CN217598532U - Parking device and automobile - Google Patents

Abstract

The application discloses parking device and car, parking device includes: the brake comprises a support plate, a first brake shoe, a second brake shoe and a parking assembly; the first brake shoe and the second brake shoe are respectively connected with the supporting plate; the parking component is rotatably connected with the supporting plate and is abutted between the first brake shoe and the second brake shoe; the parking assembly comprises a first rotating frame and a second rotating frame, and the first rotating frame is rotatably connected with the second rotating frame and the supporting plate; the first rotating frame is abutted against the first brake shoe, and the second rotating frame is abutted against the second brake shoe; when the second rotating frame rotates along the first direction, the first rotating frame is driven to rotate along the second direction, so that the first rotating frame pushes the first brake shoe, and the second rotating frame pushes the second brake shoe, so that the first brake shoe and the second brake shoe are far away from each other. The parking device has the advantages of compact structure, space saving, less parts, simpler structure and easy assembly.

Description

Parking device and automobile

Technical Field

The application relates to the technical field of automobiles, in particular to a parking device and an automobile.

Background

After the automobile stops running, in order to prevent the automobile from sliding and avoid safety accidents, the automobile is provided with a parking device. The parking device is used for locking wheels after the automobile stops running, so that the automobile is parked.

However, the conventional parking device has a large volume, occupies a large space when being mounted on an automobile, and has a large number of parts, high assembly difficulty and high assembly cost.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a parking device and car, parking device compact structure can save space, and spare part quantity is less, and the structure is fairly simple, easily assembles.

The present application provides in a first aspect a parking apparatus comprising: the brake comprises a support plate, a first brake shoe, a second brake shoe and a parking assembly; the first brake shoe and the second brake shoe are respectively connected with the supporting plate; the parking component is rotatably connected with the supporting plate and is abutted between the first brake shoe and the second brake shoe; the parking assembly comprises a first rotating frame and a second rotating frame, and the first rotating frame is rotatably connected with the second rotating frame and the supporting plate; the first rotating frame is abutted against the first brake shoe, and the second rotating frame is abutted against the second brake shoe; when the second rotating frame rotates along the first direction, the first rotating frame is driven to rotate along the second direction, so that the first rotating frame pushes the first brake shoe, the second rotating frame pushes the second brake shoe, the first brake shoe and the second brake shoe are far away from each other, and the first direction is opposite to the second direction.

In some embodiments, the parking device further comprises a connecting spring; one end of the connecting spring is connected with the first brake shoe, and the other end of the connecting spring is connected with the second brake shoe; when the first brake shoe and the second brake shoe are far away from each other, the connecting spring is stretched; when the second rotating frame rotates along the second direction, the second rotating frame drives the first rotating frame to rotate along the first direction, and the connecting spring resets to drive the first brake shoe and the second brake shoe to approach each other.

In some embodiments, the first rotating frame is provided with a first clamping groove, the first brake shoe is provided with a first matching groove, and the first clamping groove and the first matching groove are mutually clamped so that the first rotating frame abuts against the first brake shoe.

In some embodiments, the second rotating frame is provided with a second clamping groove, the second brake shoe is provided with a second matching groove, and the second clamping groove and the second matching groove are mutually clamped so that the second rotating frame abuts against the second brake shoe.

In some embodiments, the first rotating frame, a part of the second rotating frame, the first brake shoe and the second brake shoe are positioned on one side of the support plate, and the other part of the second rotating frame penetrates through the support plate and extends to the other side of the support plate; the parking zipper is connected with the part of the second transmission frame extending to the other side of the supporting plate.

In some embodiments, the parking device further comprises a fixing bracket, wherein the fixing bracket comprises a first fixing plate, a second fixing plate and a first rotating shaft, the first fixing plate and the second fixing plate are opposite at intervals and fixedly connected with the supporting plate; a portion of the first rotating frame is located in the space between the first fixing plate and the second fixing plate, the first rotating shaft penetrates through the first fixing plate, the first rotating frame and the second fixing plate, and the first rotating frame can rotate around the first rotating shaft.

In some embodiments, the parking assembly further comprises a second pivot shaft, the first turret including first and second opposed and spaced apart pivot plates, at least a portion of the second turret being located in the space between the first and second pivot plates, the second pivot shaft extending through the first and second pivot plates, the first and second turrets being rotatable about the second pivot shaft.

In some embodiments, the parking device further includes a first shoe pressing spring and a second shoe pressing spring, each of the first shoe pressing spring and the second shoe pressing spring includes a first clamping portion, an intermediate connecting portion, and a second clamping portion, and the first clamping portion and the second clamping portion are respectively fixedly connected to two opposite ends of the intermediate connecting portion; the first clamping part and the second clamping part are protruded relative to the middle connecting part; the middle connecting part of the first shoe pressing spring penetrates through the supporting plate and the first brake shoe, the first clamping part of the first shoe pressing spring is abutted against the supporting plate, and the second clamping part of the first shoe pressing spring is abutted against the first brake shoe; the middle connecting part of the second shoe pressing spring penetrates through the supporting plate and the second brake shoe, the first clamping part of the second shoe pressing spring is abutted against the supporting plate, and the second clamping part of the second shoe pressing spring is abutted against the second brake shoe.

In some embodiments, the first clamping portion is a ring structure and is provided with a buffering opening.

In some embodiments, the first clamping portion includes a first clamping section, a buffer section and a second clamping section connected in sequence, the buffer section is opposite to the buffer opening; the buffer section is arc-shaped, and the buffer section is convex towards the buffer opening.

In some embodiments, the first clamping part comprises a first connecting end and a second connecting end which are positioned at two sides of the buffer opening; the middle connecting part comprises a first straight section and a second straight section; the second clamping part comprises a first arc-shaped section and a second arc-shaped section; one end of the first straight section is fixedly connected with the first connecting end, and the first arc-shaped section is fixedly connected with the other end of the first straight section; one end of the second straight section is fixedly connected with the second connecting end, and the second arc-shaped section is fixedly connected with the other end of the second straight section.

A second aspect of the present application provides an automobile including a brake drum and the parking device of any one of the first aspect of the present application, the first brake shoe and the second brake shoe being spaced apart from each other and contactable with the brake drum to park.

The parking device provided by the embodiment of the application has a compact structure and can save space. And the parking device has fewer parts, simpler structure and easy assembly.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings used in the embodiments will be briefly described below.

Fig. 1 is a schematic structural diagram of a parking system provided in an embodiment of the present application.

Fig. 2 is a schematic structural view of another view of the parking system shown in fig. 1.

Fig. 3 is a schematic view of a split structure of the parking system shown in fig. 1.

Fig. 4 is a structural schematic diagram of a hydraulic drive device of the parking system shown in fig. 3.

Fig. 5 is a schematic view of a split structure of the hydraulic drive apparatus shown in fig. 4.

Fig. 6 is a schematic sectional structure view of the hydraulic drive apparatus shown in fig. 4.

Fig. 7 is a partially enlarged view of fig. 6.

Fig. 8 is another partial enlarged view of fig. 6.

Fig. 9 is a schematic structural view of a stroke sleeve of the hydraulic drive apparatus shown in fig. 5.

Fig. 10 is a schematic structural view of a lock sleeve of the hydraulic drive apparatus shown in fig. 5.

Fig. 11 is a schematic structural view of a moving sleeve of the hydraulic drive apparatus shown in fig. 5.

Fig. 12 is a schematic structural view of a stopper of the hydraulic drive apparatus shown in fig. 5.

Fig. 13 is a schematic structural diagram of another view angle of the limiting member of the hydraulic driving device shown in fig. 5.

Fig. 14 is a schematic structural view of a lock member of the hydraulic drive apparatus shown in fig. 5.

FIG. 15 is a schematic view of the detent lever of the detent member of FIG. 14.

Fig. 16 is a schematic view of the coupling sleeve of the latch of fig. 14.

Fig. 17 is a schematic view of the locking plug of the locking member of fig. 14.

Fig. 18 is a structural schematic view of a parking device of the parking system shown in fig. 1.

Fig. 19 is a structural schematic diagram of another view angle of the parking device shown in fig. 18.

Fig. 20 is a schematic view of a split structure of the parking device shown in fig. 18.

Fig. 21 is a structural schematic view of a support plate of the parking device shown in fig. 20.

Fig. 22 is a structural view of a first shoe spring of the parking device shown in fig. 20.

Fig. 23 is a structural view of the first compression shoe spring of fig. 22 from another perspective.

Fig. 24 is a structural schematic view of a first brake shoe and a second brake shoe of the parking device of fig. 20.

Fig. 25 is a structural schematic view of a connecting spring of the parking device shown in fig. 20.

Fig. 26 is a structural schematic view of a fixing bracket of the parking device shown in fig. 20.

Fig. 27 is a structural schematic view of a parking assembly of the parking device shown in fig. 20.

Fig. 28 is a schematic view of a split structure of the parking assembly shown in fig. 27.

Fig. 29 is a structural schematic diagram of a further view of the parking device shown in fig. 18.

Fig. 30 is a structural schematic diagram of still another view of the parking device shown in fig. 18.

Fig. 31 is a structural schematic view of a parking zipper of the parking system shown in fig. 3.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

The embodiment of the application provides an automobile, which comprises an automobile frame, wheels, a brake drum and a parking system, wherein the automobile frame comprises an automobile frame and a chassis. The wheel and the parking system are both arranged on the vehicle frame, and the brake drum is fixedly connected with the wheel. When the wheels rotate, the automobile moves forwards or backwards, and the brake drum and the wheels rotate synchronously. The parking system is used for locking or loosening the brake drum, when the brake drum is locked, the wheels stop rotating, and at the moment, the automobile is braked; when the brake drum is released, the wheels can rotate, and the automobile can normally move forwards or backwards.

Referring to fig. 1 to 3, the parking system 1000 includes a hydraulic driving device 100, a parking device 200, a parking zip 500, and a support base plate 600. One end of the parking fastener 500 is connected to the hydraulic drive device 100, and the other end of the parking fastener 500 is connected to the parking device 200. The hydraulic driving device 100 drives the parking lock 500 to move, so that the parking lock 500 drives the parking device 200 to brake or release the brake drum. The hydraulic drive device 100 and the parking device 200 are respectively connected to the support base plate 600. Wherein the hydraulic drive device 100 is fixedly connected to the support base plate 600 by four fasteners 601, and the four fasteners 601 fix the support base plate 600 and the hydraulic drive device 100 to the vehicle frame.

Referring to fig. 4 to 6, the X1 direction shown in fig. 6 is a rightward movement, i.e., a parking direction, described below, and the X2 direction shown in fig. 6 is a leftward movement, i.e., a parking release direction, described below. The hydraulic driving device 100 includes an outer casing 110, a moving sleeve 120, a limiting member 130, an elastic restoring member 140 and a locking member 150.

The outer housing 110 is provided with a stroke chamber 177 and a lock chamber 102 which are isolated from each other. The movable sleeve 120 includes a rod body 121 and a sliding guide protrusion 122 fixedly connected, and the sliding guide protrusion 122 protrudes relative to the outer circumferential surface of the rod body 121; a part of the rod body 121 and the sliding guide protrusion 122 are positioned in the stroke cavity 177, and the sliding guide protrusion 122 abuts against the cavity wall of the stroke cavity 177 to divide the stroke cavity 177 into the hydraulic cavity 101 and the movable cavity; the movable sleeve 120 is movable in the axial direction of the hydraulic drive device 100 within the stroke chamber 177. One part of the limiting member 130 is located in the stroke cavity 177 and is in transmission connection with the movable sleeve 120, and the other part of the limiting member 130 is located in the locking cavity 102; the limiting member 130 is rotatable around the axial direction of the hydraulic drive device 100. The elastic reset piece 140 is located in the movable cavity and sleeved on the movable sleeve 120 and the rod body 121, and two opposite ends of the elastic reset piece 140 are respectively fixedly connected with the rod body 121 and the cavity wall of the movable cavity; a part of the locking member 150 is located in the locking cavity 102 and can lock the limiting member 130, so that the limiting member 130 limits the movement of the moving sleeve 120.

The limiting member 130 is in transmission connection with the moving sleeve 120, specifically, the limiting member 130 is in threaded connection with the moving sleeve 120, when the limiting member 130 is not locked by the locking member 150, and when the moving sleeve 120 moves along the axial direction thereof, the limiting member 130 rotates along the axial direction thereof. The limiting member 130 can also be in transmission connection with the moving sleeve 120 through a gear rack structure, specifically, the periphery of the limiting member 130 is fixedly connected with a gear, a rack is arranged inside the moving sleeve 120, the gear is meshed with the rack, when the moving sleeve 120 moves along the axial direction thereof, the rack is driven to move, the rack drives the gear to rotate, and the gear drives the limiting member 130 to rotate.

When the automobile normally runs, the locking member 150 locks the limiting member 130, so that the limiting member 130 limits the movement of the movable sleeve 120, when the automobile needs to be parked, under the condition that the pressure in the locking cavity 102 is increased after liquid injection, the extrusion locking member 150 releases the limiting member 130, and under the condition that the pressure in the hydraulic cavity 101 is increased after liquid injection, the extrusion movable sleeve 120 moves rightwards along the axial direction of the hydraulic driving device 100, so that the limiting member 130 rotates around the axial direction of the hydraulic driving device 100, and the elastic resetting member 140 is compressed by the movable sleeve 120; the moving sleeve 120 drives the parking lock 500 to move rightward along the axial direction of the hydraulic driving device 100, and the parking lock 500 drives the parking device 200 to perform a braking action.

After the pressure in the locking chamber 102 is released, the locking member 150 is switched from the release rod 121 to the locking rod 121, so that the moving sleeve 120 is stationary relative to the outer shell 110, and the parking device 200 keeps braking.

When the pressure of the locking cavity 102 is increased after the liquid is injected again, the locking member 150 is switched from the locking rod body 121 to the releasing rod body 121, after the pressure of the hydraulic cavity 101 is released, the elastic resetting member 140 is reset to push the moving sleeve 120 to move leftward along the axial direction of the hydraulic driving device 100, so that the limiting member 130 rotates around the axial direction of the hydraulic driving device 100, the moving sleeve 120 drives the parking zipper 500 to move leftward along the axial direction of the hydraulic driving device 100, and the parking zipper 500 drives the parking device 200 to perform the brake releasing action.

Referring to fig. 7 and 8 together, the hydraulic drive apparatus 100 further includes a flexible shield 160, a first seal 161, a second seal 162, a spacer 163, a first spacer 164, a second spacer 165, a first planar bearing 166, a second planar bearing 167, a third seal 168, and a fourth seal 169. First shim 164 and second shim 165 are made of steel. Spacer sleeve 163 is made of copper. The flexible protective cover 160 is sleeved on the movable sleeve 120 and the outer shell 110 to shield a gap between the movable sleeve 120 and the outer shell 110, so as to prevent foreign objects such as water or dust from entering the gap between the movable sleeve 120 and the outer shell 110, and further prevent the foreign objects such as water or dust from entering the stroke cavity 177. The first sealing ring 161 is installed on the inner wall of the outer casing 110, and is located between the rod body 121 of the movable sleeve 120 and the outer casing 110, so as to isolate the hydraulic pressure chamber 101 from the outside, and prevent the hydraulic pressure chamber 101 from leaking to the outside. The second sealing ring 162 is installed on the sliding guide protrusion 122 and located between the sliding guide protrusion 122 and the outer casing 110, and is used for isolating the hydraulic chamber 101 from the movable chamber and preventing the hydraulic chamber 101 from leaking to the movable chamber.

The spacer 163 is located between the limiting member 130 and the outer housing 110 to separate the limiting member 130 from the outer housing 110, the flatness of the spacer 163 is greater than that of the outer housing 110, when the limiting member 130 rotates, the limiting member 130 contacts with the spacer 163 and does not contact with the outer housing 110, so that the resistance to rotation of the limiting member 130 can be reduced. It is understood that the spacer 163 is made of copper and the outer housing 110 and the limiting member 130 are made of iron. Due to the difference in manufacturing processes, the smoothness of the outer shell 110 and the limiting member 130 is low, and the smoothness of the spacer 163 can be high, so that the friction force when the limiting member 130 contacts the spacer 163 is low, and the resistance to rotation of the limiting member 130 can be reduced.

The first gasket 164 and the first planar bearing 166 are installed in the locking cavity 102, and the first gasket 164 separates the first planar bearing 166 from the outer shell 110, so that balls of the first planar bearing 166 are prevented from pressing the outer shell 110 when rolling, and the outer shell 110 is prevented from being deformed; the first plane bearing 166 is located between the first spacer 164 and the limiting member 130, and balls of the first plane bearing 166 contact with the limiting member 130 to reduce friction when the limiting member 130 rotates, so that the limiting member 130 rotates smoothly. The second gasket 165 and the second planar bearing 167 are installed in the lock cavity 102, and the second gasket 165 separates the second planar bearing 167 from the lock member 150, so as to prevent the balls of the second planar bearing 167 from pressing the lock member 150 when rotating; the second plane bearing 167 is located between the second spacer 165 and the limiting member 130, and the balls of the second plane bearing 167 contact with the limiting member 130 to reduce the friction when the limiting member 130 rotates. A third seal 168 and a fourth seal 169 are used to seal the lock chamber 102.

Specifically, the outer housing 110 includes a travel sleeve 170 and a locking sleeve 180. Referring to fig. 9, the stroke sleeve 170 has a cylindrical shape, and the stroke sleeve 170 is provided with a first axial through hole 171, a first inlet/outlet port 172, a first exhaust port 173, a first annular recess 174, and a first seal groove 175. The first axial through hole 171 penetrates through the stroke sleeve 170 in the axial direction of the stroke sleeve 170, the first axial through hole 171 comprises a first hole 176 and a stroke cavity 177 which are coaxial, the inner diameter of the first hole 176 is smaller than the inner diameter of the stroke cavity 177 so as to form an abutting wall 178 between the first hole 176 and the stroke cavity 177, namely the abutting wall 178 is formed by the stroke cavity 177 close to the wall of the first hole 176, the abutting wall 178 is used for limiting the movement of the movable sleeve 120, the wall of the first hole 176 is provided with an annular first sealing groove 175, and the first sealing groove 175 is used for installing the first sealing ring 161. The portion of the stroke chamber 177 communicating with the first hole 176 forms the hydraulic pressure chamber 101. The first inlet/outlet 172 and the first exhaust port 173 are both provided in the peripheral wall of the stroke sleeve 170, and are both communicated with the hydraulic chamber 101; the first port 172 is for the hydraulic fluid to enter or exit the hydraulic chamber 101 and the first exhaust port 173 is for the gas in the hydraulic chamber 101 to exit. A first annular recess 174 is formed in an outer wall surface of the travel sleeve 170 facing away from the first bore 176 and surrounding the travel sleeve 170, the first annular recess 174 being adapted to receive the flexible boot 160. The outer wall surface of the stroke sleeve 170 facing away from the stroke cavity 177 is provided with an annular threaded section 179, the annular threaded section 179 protrudes relative to the outer wall surface of the stroke sleeve 170 and surrounds the stroke sleeve 170 circumferentially, and the annular threaded section 179 is used for connecting with the locking sleeve 180.

Referring to fig. 10, the locking sleeve 180 is cylindrical and includes a sleeve body 181 and a baffle 182. The sleeve body 181 is provided with a second axial through hole 183, a second inlet/outlet 184 and a second exhaust port 185, and the second axial through hole 183 penetrates the locking sleeve 180 along the axial direction of the locking sleeve 180. The baffle plate 182 is fixed in the second axial through hole 183 to divide the second axial through hole 183 into a first threaded hole 186 and a mounting hole 187, the mounting hole 187 includes an accommodating hole 188 and a second threaded hole 189, and the accommodating hole 188 is located between the first threaded hole 186 and the second threaded hole 189. The bulkhead 182 defines an axial through bore 1821 that communicates with the first threaded bore 186 and the receiving bore 188. The first threaded bore 186 and the receiving bore 188 each have an inner diameter that is greater than an inner diameter of the axial through bore 1821. A portion of the receiving hole 188 is used to form the lock chamber 102. The second inlet and outlet 184 and the second exhaust port 185 are both arranged on the peripheral wall of the locking sleeve 180 and are both communicated with the locking cavity 102; the second port 184 is used for allowing hydraulic oil to enter or exit the lock chamber 102, and the second exhaust port 185 is used for exhausting gas from the lock chamber 102. The first axial through hole 171 and the mounting hole 187 constitute an axial through hole of the outer housing.

The travel sleeve 170 is fixedly coupled to the locking sleeve 180 to form the outer housing 110. Specifically, the threaded annular segment 179 of the travel sleeve 170 is disposed within the first threaded bore 186 of the locking sleeve 180 and is threadably engaged with the first threaded bore 186, and an end of the travel sleeve 170 abuts the stop plate 182 of the locking sleeve 180.

Referring to fig. 11, the moving sleeve 120 includes the rod body 121 and the sliding guide protrusion 122, and further includes a stop protrusion 123. The rod body 121 is cylindrical and has a third axial through hole 124, a second annular groove 125 and a second seal groove 126. The third axial through hole 124 includes a third threaded hole 127, a middle hole 128 and a fourth threaded hole 129 sequentially arranged along the axial direction of the moving sleeve 120, the third threaded hole 127 is used for connecting the parking zipper 500, and the fourth threaded hole 129 is used for connecting the limiting member 130. The outer circumferential surface of the rod body 121 facing away from the fourth threaded hole 129 is provided with the sliding guide protrusion 122 and the stopping protrusion 123 in a protruding manner, and the sliding guide protrusion 122 and the stopping protrusion 123 are distributed at intervals along the axial direction of the moving sleeve 120. The second annular groove 125 is disposed on the outer circumferential surface of the rod body 121 away from the third threaded hole 127, and surrounds a circle along the circumferential direction of the rod body 121, and the second annular groove 125 is used for connecting the flexible shield 160. The second seal groove 126 is disposed on the outer circumferential surface of the sliding guide protrusion 122 away from the rod body 121, and is used for mounting a second seal ring 162.

Referring to fig. 12 and 13, the limiting member 130 is cylindrical, and includes a coaxial and fixed connection rotating rod and a limiting rod 133 in turn, the rotating rod includes a threaded rod 131 and a connecting rod 132 which are fixedly connected, the connecting rod 132 is located between the threaded rod 131 and the limiting rod 133, the outer diameters of the threaded rod 131 and the connecting rod 132 are the same, the outer diameter of the limiting rod 133 is greater than that of the connecting rod 132, the two ends of the limiting rod 133, which are axially opposite to each other along the limiting member 130, are a first wall surface 134 and a second wall surface 135, the first wall surface 134 faces the connecting rod 132, and the second wall surface 135 faces away from the connecting rod 132. The limit rod 133 is provided with a third seal groove 138 and a limit groove 136, and the third seal groove 138 is located on the outer circumferential surface of the limit rod 133 and used for mounting a third seal ring 168; the limiting groove 136 is located on the second wall surface 135, the groove wall surface of the limiting groove 136 is provided with a first limiting sawtooth 137, and the limiting groove 136 is used for connecting the locking piece 150.

Referring to fig. 14, the locking member 150 includes a locking rod 151, a locking housing including a connection sleeve 152 and a locking plug 153, and a locking elastic member 154, and the connection sleeve 152 and the locking plug 153 are fixedly connected by a screw. In other embodiments, the locking housing may be integrally formed. The locking casing is equipped with the locking hole.

Referring to fig. 15, the locking rod 151 includes a locking section 155, a sliding section 156, and an anti-rotation protrusion 156a coaxially and sequentially fixed, wherein the anti-rotation protrusion 156a is protruded from an outer surface of the sliding section 156 for cooperating with the connection sleeve 152 to limit rotation of the locking rod 151. The peripheral surface of the locking section 155 is provided with second limiting sawteeth 1551, the locking section 155 is used for being connected with the limiting groove 136, and the second limiting sawteeth 1551 are used for being meshed with the first limiting sawteeth 137; the sliding section 156 is adapted to mate with the coupling sleeve 152.

Referring to fig. 16, the connection sleeve 152 is cylindrical, the connection sleeve 152 includes a first connection section 157 and a second connection section 158 coaxially fixed, the first connection section 157 includes a first thread section, the second connection section 158 includes a second thread section, the first thread section is configured to be matched with the second threaded hole 189 of the connection sleeve 152, and the second thread section is configured to be matched with the locking plug 153. The connecting sleeve 152 is provided with a fourth axial through hole 159 which penetrates through along the axial direction, the fourth axial through hole 159 comprises a sliding guide hole 1591 and an accommodating hole 1592 which are coaxial and sequentially communicated, the sliding guide hole 1591 is used for installing the locking rod 151, the hole wall of the sliding guide hole 1591 is provided with a fourth sealing groove 1593, the fourth sealing groove 1593 is used for installing the fourth sealing ring 169, and the accommodating hole 1592 is used for installing the locking elastic piece 154. The wall surface of the slide guide 1591 is provided with an anti-rotation groove for cooperating with the anti-rotation protrusion 156a to restrict the rotation of the locking lever 151.

Referring to fig. 17, the locking plug 153 is in a column shape and is provided with a blocking hole 1531, the blocking hole 1531 penetrates through one end wall surface of the locking plug 153, and a connecting column 1532 is arranged in the blocking hole 1531. The fourth axial through hole 159 and the stopper hole 1531 constitute the above-described lock hole.

Referring to fig. 6 to 8, a portion of the rod body 121 of the moving sleeve 120, the stop protrusion 123 and the sliding guide protrusion 122 are located in the stroke cavity 177, the sliding guide protrusion 122 is in contact with the cavity wall of the stroke cavity 177, and the stop protrusion 123 can abut against the abutment wall 178 of the stroke sleeve 170. Another portion of the rod 121 is positioned within the first bore 176 of the travel sleeve 170 and is in clearance fit with the first bore 176 of the travel sleeve 170. Yet another portion of the rod body 121 is located outside of the travel chamber 177. The portion of the stroke chamber 177 between the sliding guide protrusion 122 of the moving sleeve 120 and the abutment wall 178 forms the hydraulic pressure chamber 101.

The flexible protection sleeve is sleeved on the part of the rod body 121 located outside the stroke cavity 177 and on the stroke sleeve 170, one end of the flexible protection sleeve is clamped in the first annular groove 174 of the stroke sleeve 170, and the other end of the flexible protection sleeve is clamped in the second annular groove 125 of the rod body 121.

The threaded rod 131 of the limiting member 130 is positioned in the stroke cavity 177, and the threaded rod 131 extends into the fourth threaded hole 129 of the movable sleeve 120 and is in threaded connection with the fourth threaded hole 129; a portion of the connecting rod 132 of the limiting member 130 is located in the axial through hole 1821 of the baffle 182; the other portion of the connecting rod 132 of the retainer 130 and the retainer rod 133 are located in the receiving hole 188 of the locking sleeve 180.

The elastic reset element 140 is located in the movable cavity, the rod body 121 of the movable sleeve 120 of the limiting element 130 and the connecting rod 132 of the limiting element 130 are sleeved with the elastic reset element 140, and two opposite ends of the elastic reset element 140 are respectively and fixedly connected with the baffle 182 of the locking sleeve 180 and the sliding guide protrusion 122 of the movable sleeve 120.

The first connecting section 157 of the connecting sleeve 152 is located in the second threaded hole 189 of the locking sleeve 180, and the first threaded section is screwed with the second threaded hole 189, so that the connecting sleeve 152 is fixedly connected with the locking sleeve 180. The second connecting section 158 of the connecting sleeve 152 extends out of the locking sleeve 180, the first threaded section is located in the stopping hole 1531 of the locking plug 153 and is in threaded connection with the stopping hole 1531, so that the connecting sleeve 152 is fixedly connected with the locking plug 153, and the connecting column 1532 in the stopping hole 1531 is located in the accommodating hole 1592 of the connecting sleeve 152. The sliding section 156 of the locking rod 151 is located in the sliding guide hole 1591 of the connection sleeve 152, and the rotation preventing protrusion 156a is located in the rotation preventing groove to limit the rotation of the locking rod 151. The locking section 155 of the locking rod 151 is located in the limiting groove 136 of the limiting rod 133, and the first limiting saw tooth 137 is engaged with the second limiting saw tooth 1551, so that the locking rod 151 can limit the rotation of the limiting member 130, that is, the locking rod 151 locks the limiting member 130. The locking elastic member 154 is located in the receiving hole 1592 of the connecting sleeve 152 and sleeved on the connecting post 1532 in the stopping hole 1531, and opposite ends of the locking elastic member 154 are respectively and fixedly connected to the bottom wall surfaces of the locking rod 151 and the stopping hole 1531.

The first washer 164, the second washer 165, the first planar bearing 166 and the second planar bearing 167 are all located in the receiving hole 188 of the locking sleeve 180, the first washer 164 and the first planar bearing 166 are installed between the baffle plate 182 and the first wall surface 134 of the limiting rod 133, one surface of the first washer 164 abuts against the baffle plate 182, the other surface of the first washer is in contact with the balls of the first planar bearing 166, and the balls of the first planar bearing 166 are also in contact with the first wall surface 134 of the limiting rod 133. A second spacer 165 and a second flat bearing 167 are installed between the second wall surface 135 of the stopper rod 133 and the end wall surface of the connecting sleeve 152, and one surface of the second spacer 165 is in contact with the end wall surface of the connecting sleeve 152, the other surface is in contact with the balls of the second flat bearing 167, and the balls of the second flat bearing 167 are also in contact with the second wall surface 135 of the stopper rod 133. The portion of the receiving hole 188 between the second wall surface 135 of the stopper rod 133 and the end wall surface of the connecting sleeve 152 is the lock chamber 102 described above. The spacer 163 is disposed in the axial through hole 1821 of the baffle 182 and sleeved on the connecting rod 132 of the limiting member 130.

The first sealing ring 161 is installed in the first sealing groove 175 and sleeved on the rod body 121 of the movable sleeve 120, and the first sealing ring 161 can seal a gap between the hole wall of the first hole 176 and the rod body 121 of the movable sleeve 120 to prevent oil in the hydraulic chamber 101 from leaking to the outside. The second seal ring 162 is installed in the second seal groove 126 and abuts against the wall of the stroke chamber 177, and the first seal ring 161 can seal a gap between the wall of the stroke chamber 177 and the outer circumferential surface of the sliding guide protrusion 122 to prevent the oil in the hydraulic chamber 101 from leaking to the movable chamber. The third sealing ring 168 is installed in the third sealing groove 138 and abuts against the hole wall of the accommodating hole 188 of the connecting sleeve 152, and the third sealing ring 168 can seal a gap between the hole wall of the accommodating hole 188 and the limiting rod 133 of the limiting member 130, so that oil leakage is prevented. The fourth sealing ring 169 is installed in the fourth sealing groove 1593, and is sleeved on the sliding section 156 of the locking rod 151 to seal a gap between the locking rod 151 and a wall of the sliding guide hole 1591 of the connection sleeve 152, thereby preventing oil leakage.

Referring to fig. 18 to 20, the parking device 200 includes a support plate 210, a first shoe spring 220, a second shoe spring 230, a first shoe 240, a second shoe 250, a connecting spring 260, a fixing bracket 270, a parking assembly 280, a connecting member 300, and a shield case 400.

Opposite ends of the first shoe pressing spring 220 are connected to the support plate 210 and the first brake shoe 240, respectively, and opposite ends of the second shoe pressing spring 230 are connected to the support plate 210 and the second brake shoe 250, respectively; both ends of the connecting spring 260 are connected with the first brake shoe 240 and the second brake shoe 250, respectively; the fixing bracket 270 is fixedly coupled to one side of the support plate 210.

The parking assembly 280 is located between the first and second brake shoes 240 and 250; the parking assembly 280 includes a first turret 281 and a second turret 282, the first turret 281 abutting the first brake shoe 240 and the second turret 282 abutting the second brake shoe 250. The first rotating frame 281 is respectively connected with the second rotating frame 282 and the fixed bracket 270 in a rotating manner; the second rotating frame 282 extends through the supporting plate 210 to a side of the supporting plate 210 facing away from the fixing bracket 270. A linkage 300 is positioned between the first and second brake shoes 240 and 250 opposite the parking assembly 280, the first and second brake shoes 240 and 250 being connected to opposite sides of the linkage 300, respectively.

The protective housing 400 is fixedly connected to the support plate 210 and encloses a portion of the second rotating frame 282 away from the fixing bracket 270, so as to prevent foreign materials such as dust and water from entering the other side of the support plate 210 from around the second rotating frame 282.

When the second rotating frame 282 rotates in the first direction, the first rotating frame 281 can be driven to rotate in the second direction, so that the first rotating frame 281 pushes the first brake shoe 240, the second rotating frame 282 pushes the second brake shoe 250, the first shoe pressing spring 220 and the second shoe pressing spring 230 deform, the first brake shoe 240 and the second brake shoe 250 overcome the elastic force of the connecting spring 260, and the first brake shoe 240 and the second brake shoe 250 move away from each other; the first direction is opposite to the second direction.

The brake drum is in a circular shell with an opening at one side, a cavity chamber is formed, and the first brake shoe 240 and the second brake shoe 250 of the brake device can contact with the inner wall surface of the cavity chamber after being separated from each other, so that parking is realized. The method comprises the following specific steps: the portion of the second pivoting frame 282 protruding from the support plate 210 is fixedly coupled to the parking zipper 500. When parking is needed, the parking lock 500 is pulled to the right by the hydraulic driving device 100, the parking lock 500 drives the second rotating frame 282 to rotate counterclockwise, the second rotating frame 282 drives the first rotating frame 281 to rotate clockwise, so that the first rotating frame 281 pushes the first brake shoe 240, the second rotating frame 282 pushes the second brake shoe 250, so that the first brake shoe 240 and the second brake shoe 250 overcome the elastic force of the connecting spring 260, the connecting spring 260 is stretched, the first brake shoe 240 and the second brake shoe 250 are away from each other, and at this time, the first brake shoe 240 and the second brake shoe 250 are respectively in contact with the brake drum to generate friction force on the brake drum, so that the brake drum stops rotating, the wheel connected with the brake drum stops rotating, and parking is achieved.

When parking is released, the parking zipper 500 is pulled leftward by the hydraulic driving device 100, the parking zipper 500 drives the second rotating frame 282 to rotate clockwise, the second rotating frame 282 drives the first rotating frame 281 to rotate counterclockwise, so that the first rotating frame 281 is far away from the first brake shoe 240, the second rotating frame 282 is far away from the second brake shoe 250, at this time, the force generated by the first brake shoe 240 and the second brake shoe 250 on the brake drum disappears, the connecting spring 260 resets, the first brake shoe 240 and the second brake shoe 250 are driven to be far away from the brake drum, the first brake shoe 240 and the second brake shoe 250 are close to each other, and then parking is released.

Referring to fig. 21, the supporting plate 210 is a circular thin plate and is provided with a connecting hole 211, a first fastening hole 212, and a second fastening hole 213, the connecting hole 211, the first fastening hole 212, and the second fastening hole 213 all penetrate through the supporting plate 210 along a thickness direction of the supporting plate 210, the connecting hole 211 is used for the parking component 280 to penetrate through, the first fastening hole 212 is used for connecting the first shoe pressing spring 220, and the second fastening hole 213 is used for connecting the second shoe pressing spring 230.

Referring to fig. 22 and 23, the first shoe pressing spring 220 is elastically deformable and includes a first clamping portion 221, an intermediate connecting portion 222, and a second clamping portion 223, the first clamping portion 221 and the second clamping portion 223 are respectively fixedly connected to opposite ends of the intermediate connecting portion 222, the first clamping portion 221 protrudes to both sides with respect to the intermediate connecting portion 222, and the second clamping portion 223 protrudes to both sides with respect to the intermediate connecting portion 222. The first clamping portion 221 is of an annular structure and has a buffering opening 224, a first connecting end and a second connecting end, and the first connecting end and the second connecting end are respectively disposed on two sides of the buffering opening 224. The first clamping portion 221 includes a first clamping section 2211, a buffer section 2212 and a second clamping section 2213, and each of the first clamping section 2211 and the second clamping section 2213 has an annular structure with an opening. The buffering section 2212 is opposite to the buffering opening 224 and is arc-shaped, and the convex side of the buffering section 2212 faces the buffering opening 24. The two ends of the buffering section 2212 are respectively and fixedly connected with one end of the first clamping section 2211 and one end of the second clamping section 2213, and the first clamping section 2211 and the second clamping section 2213 are symmetrically distributed on the two sides of the buffering section 2212. The other end of the first clamping section 2211 forms the first connection end and the other end of the second clamping section 2213 forms the second connection end. First joint section 2211 has elastic deformation ability, and buffering section 2212 is the arc, can increase the elasticity of first joint section 2211, prevents that first joint section 2211 from appearing the rigidity and warp. First and second clamping segments 2211 and 2213 are each adapted to clamp to support plate 210 to facilitate coupling support plate 210 to first brake shoe 240.

The middle connection portion 222 includes a first flat section 225 and a second flat section 226, the first flat section 225 and the second flat section 226 are parallel to each other, one end of the first flat section 225 is fixedly connected to the other end of the first clamping section 2211, and one end of the second flat section 226 is fixedly connected to the other end of the second clamping section 2213. The first and second flat sections 225 and 226 allow the first shoe spring 220 to have a sufficient length to connect the support plate 210 and the first brake shoe 240.

The second clamping portion 223 includes a first arc-shaped segment 227 and a second arc-shaped segment 228, one end of the first arc-shaped segment 227 is fixedly connected with the other end of the first straight segment 225, and one end of the second arc-shaped segment 228 is fixedly connected with the second straight segment 226. First arcuate segment 227 and second arcuate segment 228 are each arcuate and each project away from intermediate link 222 to facilitate removal of first shoe spring 220, and in particular to facilitate passing second clamping segment 2213 through first brake shoe 240, clamping second clamping segment 2213 to first brake shoe 240, and removal of first shoe spring 220.

The second pressure shoe spring 230 has the same structure as the first pressure shoe spring 220, and please refer to the description of the first pressure shoe spring 220 for the specific structure and connection relationship of the components.

Referring to fig. 24, the first brake shoe 240 has an arc shape and includes a first connection plate 241 and a first brake plate 242, one side of the first brake plate 242 is fixedly connected to one side of the first connection plate 241, and the first brake plate 242 and the first connection plate 241 are perpendicular to each other. The first connecting plate 241 is provided with a first avoidance hole 243, a first through hole 244 and a second through hole 245, the first avoidance hole 243, the first through hole 244 and the second through hole 245 all penetrate through the first connecting plate 241 along the thickness direction of the first connecting plate 241, the first avoidance hole 243 is used for the first shoe pressing spring 220 to penetrate through, and the first through hole 244 and the second through hole 245 are used for being connected with the connecting spring 260. The first connection plate 241 has a first engagement groove 246 and a second engagement groove 247 at both ends thereof, the first engagement groove 246 being adapted to be engaged with the first rotating frame 281, and the second engagement groove 247 being adapted to be connected with the connection member 300.

The second brake shoe 250 has the same structure as the first brake shoe 240 and includes a second connecting plate 251 and a second brake plate 252, the second connecting plate 251 is provided with a second avoiding hole 253, a third through hole 254 and a fourth through hole 255, the second avoiding hole 253 is used for the second shoe spring 230 to pass through, and the third through hole 254 and the fourth through hole 255 are used for the connection with the connecting spring 260. The two ends of the second connecting plate 251 are respectively provided with a third matching groove 256 and a fourth matching groove 257, the third matching groove 256 is used for being clamped with the second rotating frame 282, and the fourth matching groove 257 is used for being connected with the connecting piece 300.

Referring to fig. 25, the connection spring 260 includes a first elastic member 261 and a second elastic member 262, the first elastic member 261 including a first spiral section 263, a first connection hook 264 and a second connection hook 265, the first connection hook 264 and the second connection hook 265 respectively connecting opposite ends of the first spiral section 263. The first coupling hooks 264 are adapted to be coupled with the first through holes 244 of the support plate 210, and the second coupling hooks 265 are adapted to be coupled with the third through holes 254 of the support plate 210. The second elastic member 262 includes a second spiral section 266, a third coupling hook 267 and a fourth coupling hook 268, the third coupling hook 267 and the fourth coupling hook 268 are coupled to opposite ends of the second spiral section 266, respectively, the third coupling hook 267 is adapted to be coupled to the second penetration hole 245 of the support plate 210, and the fourth coupling hook 268 is adapted to be coupled to the fourth penetration hole 255 of the support plate 210.

Referring to fig. 26, the fixing bracket 270 includes a first fixing plate 271, a second fixing plate 272, a first connecting shaft 273, a first pin pipe 274, a second pin pipe 275, and a first split pin 276, and the first fixing plate 271 and the second fixing plate 272 are fixedly coupled to the support plate 210, respectively. The first fixing plate 271 and the second fixing plate 272 are disposed opposite to each other at an interval, and the first connecting shaft 273 is located between the first fixing plate 271 and the second fixing plate 272 and fixedly connected to the first fixing plate 271 and the second fixing plate 272. The first pin tube 274, the second pin tube 275 and the first cotter pin 276 are adapted to cooperate with the first connecting shaft 273 such that the first rotating bracket 281 of the parking assembly 280 is rotatably connected to the fixed bracket 270.

Referring to fig. 27 and 28, the parking assembly 280 includes first and second rotating frames 281 and 282, and further includes a second connecting shaft 293 and a second cotter pin 292. The first rotating frame 281 comprises a first rotating plate 283, a first intermediate connecting plate 284 and a second rotating plate 285, wherein the first rotating plate 283 and the second rotating plate 285 are fixedly connected to two opposite sides of the first intermediate connecting plate 284, the first rotating plate 283 and the second rotating plate 285 are arranged oppositely and at intervals, and both the first rotating plate 283 and the second rotating plate 285 are provided with a first clamping groove 286, and the first clamping groove 286 is used for being clamped with the first matching groove 246 of the first brake shoe 240. The second rotating frame 282 of the parking assembly 280 includes a third rotating plate 287, a second intermediate connecting plate 288 and a fourth rotating plate 289, wherein both sides of the second intermediate connecting plate 288 are respectively fixedly connected with the third rotating plate 287 and the fourth rotating plate 289, the third rotating plate 287 and the fourth rotating plate 289 are arranged opposite to each other and spaced apart from each other, and the third rotating plate 287 and the fourth rotating plate 289 are respectively provided with a second clamping groove 290, and the second clamping groove 290 is used for being mutually clamped with the third matching groove 256 of the second brake shoe 250. The third rotating plate 287 and the fourth rotating plate 289 are also provided with a third catching groove 291, and the third catching groove 291 is used for connecting the parking zipper 500. The height of the fourth rotating plate 289 is smaller than the height of the third rotating plate 287. The first and second catch slots 286, 290 are located on opposite sides of the park assembly 280. The second connecting shaft 293 and the second cotter pin 292 serve to rotatably connect the first and second rotating frames 281 and 282.

In this embodiment, referring to fig. 29 and 30, the first rotating frame 281 and the fixed frame 270 are rotatably connected by a first connecting shaft 273. Specifically, at least a portion of the first rotating frame 281 is located in an interval between the first fixing plate 271 and the second fixing plate 272, the first connecting shaft 273 sequentially penetrates through the first fixing plate 271, the first rotating plate 283, the second rotating plate 285 and the second fixing plate 272, and extends out of one side of the second fixing plate 272 away from the first fixing plate 271, the first connecting shaft 273 is provided with a first pin 274 and a second cotter pin 292 at one side of the second fixing plate 272 away from the first fixing plate 271, and the first connecting shaft 273 is provided with a second pin 275 at one side of the first fixing plate 271 away from the second fixing plate 272.

The first and second rotating frames 281 and 282 are rotatably connected by a second connecting shaft 293. The third rotating plate 287 is at least partially positioned in the space between the first rotating plate 283 and the second rotating plate 285, and the second connecting shaft 293 penetrates the first rotating plate 283, the third rotating plate 287 and the second rotating plate 285 and protrudes out of the second rotating plate 285. The portion of the second connecting shaft 293 extending beyond the second pivoting plate 285 engages a first cotter 276.

The first brake shoe 240, the second brake shoe 250, the first rotating frame 281 and the fixing frame 270 are positioned on the same side of the support plate 210, and the concave portions of the first brake shoe 240 and the second brake shoe 250 are opposite to each other, and the first engagement groove 246 of the first brake shoe 240 and the third engagement groove 256 of the second brake shoe 250 are spaced apart from each other; the second engagement groove 247 of the first brake shoe 240 and the fourth engagement groove 257 of the second brake shoe 250 are spaced apart and opposed to each other.

A portion of the first rotating frame 281 and a portion of the second rotating frame 282 are positioned in the space between the first and third fitting grooves 246 and 256, the third rotating plate 287 of the second rotating frame 282 passes through the coupling hole 211 of the support plate 210, and the fourth rotating plate 289 and a portion of the third rotating plate 287 are positioned at a side of the support plate 210 facing away from the fixed bracket 270. First fitting groove 246 of first brake shoe 240 is engaged with first engaging groove 286. The third fitting groove 256 of the second brake shoe 250 is engaged with the second engagement groove 290.

The link member 300 is located in the space between the second fitting groove 247 of the first brake shoe 240 and the fourth fitting groove 257 of the second brake shoe 250, and opposite sides of the link member 300 are respectively inserted into the second fitting groove 247 and the fourth fitting groove 257 and abut against the groove wall surfaces of the second fitting groove 247 and the fourth fitting groove 257.

The intermediate connecting portion 222 of the first shoe pressing spring 220 passes through the first avoiding hole 243 and the first clamping hole 212, the first clamping portion 221 is abutted against one side of the first connecting plate 241, which is far away from the supporting plate 210, the second clamping portion 223 is abutted against one side of the supporting plate 210, which is far away from the first brake shoe 240, so that the first shoe pressing spring 220 connects the first brake shoe 240 with the supporting plate 210, and the intermediate connecting portion 222 of the first shoe pressing spring 220 can move in the first avoiding hole 243 in the left-right direction.

The second intermediate connecting portion of the second shoe pressing spring 230 passes through the second avoiding hole 253 and the second clamping hole 213, the third clamping portion abuts against one side of the second connecting plate 251 away from the supporting plate 210, the fourth clamping portion abuts against one side of the supporting plate 210 away from the second brake shoe 250, so that the second shoe pressing spring 230 connects the second brake shoe 250 with the supporting plate 210, and the second intermediate connecting portion of the second shoe pressing spring 230 can move in the second avoiding hole 253 in the left-right direction.

A first coupling hook 264 of the first elastic member 261 is coupled to the first through-hole 244 of the first brake shoe 240, and a second coupling hook 265 of the first elastic member 261 is coupled to the third through-hole 254 of the second brake shoe 250. The second coupling hook 265 of the second elastic member 262 is coupled to the second through-hole 245 of the first brake shoe 240, and the fourth coupling hook 268 of the second elastic member 262 is coupled to the fourth through-hole 255 of the second brake shoe 250.

The protective housing 400 is fixed to a side of the support plate 210 facing away from the first brake shoe 240 and the like, and surrounds the connection hole 211 of the support plate 210.

Referring to fig. 31, the parking fastener 500 includes a rope 510, a fixing block 520, and a fastening block 530, the fixing block 520 and the fastening block 530 are respectively fixedly connected to opposite ends of the rope 510, an external thread is disposed on an outer circumference of the fixing block 520, and the fixing block 520 is located in a third threaded hole 127 of a rod body 121 of the movable sleeve 120 and is threadedly coupled to the third threaded hole 127, so that the fixing block 520 and the rod body 121 of the movable sleeve 120 are fixedly connected. The clamping block 530 is in a column shape and clamped with the third clamping groove 291 on the third rotating plate 287 and the fourth rotating plate 289, so that the clamping block 530 is fixedly connected with the second rotating frame 282.

The outer side of the stroke sleeve 170 is fixedly connected to the support base plate 600 by four fasteners 601, so that the parking device 200 is fixedly connected to the support base plate 600. The support base plate 600 is disposed on the shield case 400 away from the parking device 200. So that the hydraulic drive apparatus 100 is connected to the support base 600.

In this embodiment, when the automobile normally travels, the hydraulic chamber 101 and the locking chamber 102 are in a pressure-releasing state, the locking section 155 of the locking rod 151 is located in the limiting groove 136 of the limiting rod 133, and the first limiting saw tooth 137 and the second limiting saw tooth 1551 are engaged with each other, the stopping protrusion 123 of the moving sleeve 120 abuts against the abutting wall 178 of the stroke sleeve 170, at this time, the limiting member 130 is fixedly connected to the locking rod 151, and the locking rod 151 limits the rotation of the limiting member 130, so that the limiting member 130 limits the movement of the moving sleeve 120.

When the vehicle needs to be parked, hydraulic oil is injected into the locking cavity 102 from the first inlet/outlet 172, so that the pressure in the locking cavity 102 is gradually increased, the locking rod 151 is pushed by the pressure generated by the hydraulic oil, the locking section 155 of the locking rod 151 is separated from the limiting groove 136 of the limiting rod 133, the locking rod 151 pushes the locking elastic piece 154 and is abutted against the connecting column 1532, and the locking elastic piece 154 is compressed by the locking rod 151. At this time, the locking rod 151 is separated from the limiting member 130, and the locking of the limiting member 130 by the locking rod 151 is released, so that the limiting member 130 can rotate around the axial direction thereof. Then, hydraulic oil is injected into the hydraulic chamber 101 from the second port 184, so that the pressure in the hydraulic chamber 101 gradually increases, and the pressure generated by the hydraulic oil pushes the sliding guide protrusion 122, so that the sliding guide protrusion 122 and the rod body 121 gradually move in the direction of the movable chamber (rightward), that is, the rod body 121 gradually moves toward the inside of the stroke chamber 177. In the process of moving the sliding guide protrusion 122 and the rod body 121, the limiting member 130 rotates along with the movement of the rod body 121, and the threaded rod 131 of the limiting member 130 gradually moves into the fourth threaded hole 129 of the moving sleeve 120, so as to prevent the limiting member 130 from affecting the movement of the rod body 121. At this time, the length of the rod body 121 exposed outside the stroke cavity 177 is gradually shortened, and the rod body 121 drives the flexible shield 160 to be gradually folded so as to match with the length of the part of the rod body 121 exposed outside; at the same time, the elastic restoring member 140 is compressed by the sliding guide protrusion 122.

When the rod body 121 gradually moves towards the inside of the stroke cavity 177, the fixing block 520 of the parking zipper 500 is driven to move, so that the rope 510 pulls the clamping block 530, the clamping block 530 drives the second rotating frame 282 to rotate clockwise around the second connecting shaft 293, and the second rotating frame 282 drives the first rotating frame 281 to rotate counterclockwise around the first connecting shaft 273 and the second connecting shaft 293. At least portions of the first and second turrets 281 and 282 are moved away from each other with an increased angle therebetween, the first and second turrets 281 and 282 push the first and second brake shoes 240 and 250 away from each other against the elastic force of the first and second elastic members 261 and 262, at which time the first and second spiral sections 263 and 266 of the first and second elastic members 261 and 262 are both stretched, the first shoe spring 220 is displaced in the first avoidance hole 243, and the second shoe spring 230 is displaced in the second avoidance hole 253. The first brake shoe 240 and the second brake shoe 250 are both in contact with the inner wall surface of the hollow chamber of the brake drum, and generate friction force with the inner wall surface of the hollow chamber of the brake drum, and the friction force brakes the brake drum, so that the brake drum stops rotating, the wheel connected with the brake drum stops rotating, and parking is achieved.

The latch chamber 102 is then vented through the first vent 173, causing the pressure within the latch chamber 102 to decrease. At this time, the locking elastic member 154 is reset to drive the locking rod 151 to move leftward, so that the locking section 155 of the locking rod 151 is located in the limiting groove 136 of the limiting rod 133, and the first limiting saw tooth 137 and the second limiting saw tooth 1551 are engaged with each other. The stopper 130 is locked by the locking rod 151 so as not to rotate, and the moving sleeve 120 is restricted by the stopper 130 so as not to move, so that the parking zipper 500 maintains a state of applying a force to the second rotating frame 282, and the first and second brake shoes 240 and 250 maintain a state of being in contact with a brake drum, thereby preventing a parking force from being lowered and maintaining a parking state.

When the parking state needs to be released, hydraulic oil is injected into the locking cavity 102 again from the first inlet/outlet 172, so that the pressure in the locking cavity 102 is gradually increased, the pressure generated by the hydraulic oil pushes the locking rod 151, the locking section 155 of the locking rod 151 is separated from the limiting groove 136 of the limiting rod 133, the locking rod 151 pushes the locking elastic piece 154, and the locking elastic piece 154 is compressed by the locking rod 151. At this time, the locking rod 151 is separated from the limiting member 130, and the locking of the limiting member 130 by the locking rod 151 is released, so that the limiting member 130 can rotate around the axial direction thereof. The hydraulic pressure chamber 101 is then depressurized through the second exhaust port 185, so that the pressure inside the hydraulic pressure chamber 101 is reduced. At this time, the elastic reset element 140 is reset, and pushes the moving sleeve 120 to move leftward, that is, the rod body 121 gradually moves toward the outside of the stroke cavity 177. In the moving process of the rod body 121, the limiting member 130 rotates along with the movement of the rod body 121, and the threaded rod 131 of the limiting member 130 gradually moves out of the fourth threaded hole 129 of the moving sleeve 120, so as to prevent the limiting member 130 from affecting the movement of the rod body 121. At this time, the length of the rod body 121 exposed outside the stroke cavity 177 gradually increases, and the rod body 121 drives the flexible shield 160 to gradually expand so as to match the length of the exposed part of the rod body 121.

When the rod body 121 gradually moves to the outside of the stroke cavity 177, the fixing block 520 of the parking zipper 500 is driven to move, so that the rope 510 pulls the clamping block 530, the clamping block 530 drives the second rotating frame 282 to rotate around the second connecting shaft 293 in the counterclockwise direction, and the second rotating frame 282 drives the first rotating frame 281 to rotate around the first connecting shaft 273 and the second connecting shaft 293 in the clockwise direction. At least portions of the first and second rotating frames 281 and 282 are close to each other, and an angle therebetween is reduced, an urging force of the first rotating frame 281 against the first brake shoe 240 is reduced or eliminated, an abutting force of the second rotating frame 282 against the third engaging groove 256 of the second brake shoe 250 is reduced or eliminated, and at this time, the first spiral section 263 of the first elastic member 261 and the second spiral section 266 of the second elastic member 262 are reset to bring the first brake shoe 240 and the second brake shoe 250 close to each other, the first shoe pressing spring 220 is displaced in the first escape hole 243 to a position when the shoe is not parked, and the second shoe pressing spring 230 is displaced in the second escape hole 253 to a position when the shoe is not parked. At this time, both the first brake shoe 240 and the second brake shoe 250 are separated from the inner wall surface of the hollow chamber of the brake drum, and the friction force generated on the inner wall surface of the hollow chamber of the brake drum disappears, thereby realizing the parking release.

In this embodiment, the hydraulic oil is injected into the locking cavity 102 to increase the pressure in the locking cavity 102, and the pressure is used to release the limitation of the locking member 150 on the limiting member 130, so that the limiting member 130 can rotate. Then, hydraulic oil is injected into the hydraulic cavity 101 to increase the pressure of the hydraulic cavity 101, the pressure drives the movable sleeve 120 to move towards the parking direction, at this time, the limiting member 130 rotates along with the movement of the movable sleeve 120, the movement of the movable sleeve 120 is not affected, so that the movable sleeve 120 drives the parking zipper 500, the parking zipper 500 pulls the parking assembly 280, further, the first brake shoe 240 and the second brake shoe 250 are separated from each other, and the brake drum is braked by the first brake shoe 240 and the second brake shoe 250. Then, the locking cavity 102 is decompressed, so that the locking member 150 locks the limiting member 130 again, so that the limiting member 130 cannot rotate, and the limiting member 130 limits the movement of the moving sleeve 120.

As can be seen from the above, in the present embodiment, the parking is achieved by the pressure generated by the hydraulic oil in the hydraulic chamber 101, the generated force (parking force) for pulling the parking lock 500 is large, the parking can be performed quickly, and the parking reliability is high. In addition, after parking is achieved, the pressure generated by the hydraulic oil in the locking cavity 102 enables the locking piece 150 to lock the limiting piece 130 again, so that the locking of the movable sleeve 120 is achieved, the parking stability is improved, and the phenomenon of vehicle sliding does not occur even if the vehicle is parked for a long time.

In addition, in the present embodiment, the parking device 200 is separately integrated, so that the structure is more compact, and the space can be saved. The parking device 200 has a small number of parts, a simple structure, and is easy to assemble. And the hydraulic driving device and the parking device are arranged in a stacked mode, the structure is more compact, and the whole parking system occupies less space.

In addition, in this embodiment, the first shoe pressing spring 220 and the second shoe pressing spring 230 are integrally formed, so that the number of parts of the parking device 200 is reduced, the assembly difficulty is reduced, the assembly efficiency is improved, the assembly cost is reduced, and the fatigue condition of workers is reduced.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the description of the embodiments is only provided to help understand the method and the core concept of the present application.

Claims (12)

1. A parking device characterized by comprising: the brake comprises a support plate, a first brake shoe, a second brake shoe and a parking assembly; the first brake shoe and the second brake shoe are respectively connected with the supporting plate; the parking assembly is rotatably connected with the supporting plate and abutted between the first brake shoe and the second brake shoe;

the parking assembly comprises a first rotating frame and a second rotating frame, and the first rotating frame is rotatably connected with the second rotating frame and the supporting plate; the first turret abuts the first brake shoe and the second turret abuts the second brake shoe;

when the second rotating frame rotates along a first direction, the first rotating frame is driven to rotate along a second direction, so that the first rotating frame pushes the first brake shoe, the second rotating frame pushes the second brake shoe, the first brake shoe and the second brake shoe are far away from each other, and the first direction is opposite to the second direction.

2. The parking device according to claim 1, further comprising a connecting spring; one end of the connecting spring is connected with the first brake shoe, and the other end of the connecting spring is connected with the second brake shoe; when the first brake shoe and the second brake shoe are far away from each other, the connecting spring is stretched;

when the second rotating frame rotates along the second direction, the second rotating frame drives the first rotating frame to rotate along the first direction, and the connecting spring resets to drive the first brake shoe and the second brake shoe to approach each other.

3. The parking device according to claim 1 or 2, wherein the first rotating frame is provided with a first clamping groove, the first brake shoe is provided with a first matching groove, and the first clamping groove and the first matching groove are mutually clamped so that the first rotating frame abuts against the first brake shoe.

4. The parking device according to claim 1 or 2, wherein the second rotating frame is provided with a second clamping groove, the second brake shoe is provided with a second matching groove, and the second clamping groove and the second matching groove are mutually clamped so that the second rotating frame abuts against the second brake shoe.

5. The parking device according to claim 1 or 2, wherein the first rotating frame, a portion of the second rotating frame, the first brake shoe, and the second brake shoe are located on one side of the support plate, and another portion of the second rotating frame penetrates the support plate and extends to the other side of the support plate; the parking zipper is connected with a part of the second rotating frame extending to the other side of the supporting plate.

6. The parking device according to claim 1 or 2, further comprising a fixing bracket, wherein the fixing bracket comprises a first fixing plate, a second fixing plate and a first rotating shaft, the first fixing plate and the second fixing plate are opposite to each other in a spaced mode and fixedly connected with the supporting plate; a portion of the first rotating frame is located in a space between the first fixing plate and the second fixing plate, the first rotating shaft penetrates through the first fixing plate, the first rotating frame and the second fixing plate, and the first rotating frame is rotatable around the first rotating shaft.

7. The parking device of claim 1 or 2, wherein the parking assembly further comprises a second pivot shaft, the first turret including first and second opposed and spaced apart pivot plates, at least a portion of the second turret being located in the space between the first and second pivot plates, the second pivot shaft extending through the first, second and second pivot plates, the first and second turrets being rotatable about the second pivot shaft.

8. The parking device according to claim 1 or 2, further comprising a first shoe pressing spring and a second shoe pressing spring, wherein each of the first shoe pressing spring and the second shoe pressing spring comprises a first clamping portion, an intermediate connecting portion and a second clamping portion, and the first clamping portion and the second clamping portion are fixedly connected to two opposite ends of the intermediate connecting portion respectively; the first clamping part and the second clamping part are protruded relative to the middle connecting part; the intermediate connecting portion of the first shoe pressing spring penetrates through the support plate and the first brake shoe, the first clamping portion of the first shoe pressing spring abuts against the support plate, and the second clamping portion of the first shoe pressing spring abuts against the first brake shoe;

the intermediate connecting portion of the second shoe pressing spring penetrates through the support plate and the second brake shoe, the first clamping portion of the second shoe pressing spring abuts against the support plate, and the second clamping portion of the second shoe pressing spring abuts against the second brake shoe.

9. The parking device according to claim 8, wherein the first clamping portion is of an annular structure and is provided with a buffering opening.

10. The parking device according to claim 9, wherein the first clamping portion comprises a first clamping section, a buffering section and a second clamping section which are connected in sequence, and the buffering section is opposite to the buffering opening; the buffer section is arc-shaped, and the buffer section faces the buffer opening and is protruded.

11. The parking device according to claim 10, wherein the first catching portion includes a first connection end and a second connection end located at both sides of the buffer opening; the intermediate connecting part comprises a first straight section and a second straight section; the second clamping part comprises a first arc-shaped section and a second arc-shaped section; one end of the first straight section is fixedly connected with the first connecting end, and the first arc-shaped section is fixedly connected with the other end of the first straight section; one end of the second straight section is fixedly connected with the second connecting end, and the second arc-shaped section is fixedly connected with the other end of the second straight section.

12. An automobile comprising a brake drum and a parking device as claimed in any one of claims 1 to 11, wherein said first and second brake shoes are spaced apart from each other and are contactable with said brake drum for parking.

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