CN113685542B

CN113685542B - Hydraulic drive parking locking mechanism, parking system and gearbox

Info

Publication number: CN113685542B
Application number: CN202110992265.4A
Authority: CN
Inventors: 苏鹏; 唐心宇; 韩启锋; 许艳利
Original assignee: Kuntye Vehicle System Changzhou Co Ltd
Current assignee: Kuntai Vehicle System Changzhou Co ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2023-01-31
Anticipated expiration: 2041-08-27
Also published as: CN113685542A

Abstract

The invention discloses a hydraulic drive parking locking mechanism, a parking system and a gearbox, wherein the hydraulic drive parking locking mechanism comprises a parking support, a driving mechanism and a pawl are arranged on the parking support, the driving mechanism is connected with a connecting rod assembly parallel to the driving mechanism to drive the pawl to rotate, the extending end of the connecting rod assembly is provided with a pushing block, the diameter of the pushing block close to the rear end part of the pawl is smaller than that of the pushing block far away from the front end part of the pawl, a pawl spring is arranged between the second bottom end of the pawl and the parking support, the pushing block is always abutted against the first bottom end of the pawl, and the pushing block synchronously moves in the same direction along with a piston rod to enable the front end part or the rear end part to be abutted against the first bottom end so as to change the height of a locking top block of the pawl and realize the switching of parking and starting states. The invention ensures that the parking system has higher integration, is more intelligent and saves the internal space layout.

Description

Hydraulic drive parking locking mechanism, parking system and gearbox

Technical Field

The invention relates to the technical field of automobile gearboxes, in particular to a hydraulically-driven parking locking mechanism, a parking system and a gearbox.

Background

With the continuous development of the automobile industry, the automation and integration of automobiles become more and more obvious, and a parking brake safety mechanism needs to be designed for preventing the automobiles from sliding unexpectedly when the automobiles are parked.

Various such parking lock mechanisms are known from the prior art. They usually comprise a pawl which is pivotably supported on a pawl pin and engages in or disengages from a parking lock gear wheel connected to the output end of the automatic transmission, and a locking element which is arranged on a connecting rod connected to a selector disc supported on the pin and which, in the locked state, is clamped between the pawl and a guide plate in order to prevent the pawl from being pressed out of the backlash of the parking lock gear wheel.

The current parking locking mechanical system has the drawback of some traditional mechanical parking, and a lot of motor transmission locking mechanical system that have now are open-type, need manually carry out mechanical lock after the parking and die, and this leads to appearing easily because driver's forgetting leads to locking to die unsuccessfully, especially on having the subaerial of slope, produces the swift current car phenomenon. In addition, the existing parking locking mechanism has larger volume and low integration, and does not meet the development requirement of high automation and high integration of the existing automobile industry.

Therefore, it is necessary to provide a new parking lock mechanism in order to solve the above problems.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a hydraulically-driven parking locking mechanism, a parking system and a gearbox.

The purpose of the invention is realized by the following technical scheme:

a hydraulic drive parking locking mechanism comprises a parking support, wherein a driving mechanism and a pawl are arranged on the parking support, the driving mechanism comprises a pressure regulating electromagnetic valve and a piston cylinder which are communicated, a piston rod is coaxially arranged in the piston cylinder, a return spring is sleeved on the piston rod, the outer end of the piston rod protrudes out of the piston cylinder, the outer end of the piston rod is connected with a connecting rod assembly which is parallel to the piston rod, the connecting rod assembly extends from the outer end of the piston rod to the inner end of the piston rod and synchronously moves in the same direction with the piston rod, the extending end of the connecting rod assembly is provided with a pushing block, the diameter of the pushing block close to the rear end of the pawl is smaller than that of the pushing block far away from the front end of the pawl, a pawl spring is arranged between the second bottom of the pawl and the parking support, the pushing block is always abutted against the first bottom end of the pawl, and the pushing block synchronously moves in the same direction along with the piston rod to enable the front end or the rear end to be abutted against the first bottom end of the pawl, so as to change the height of the top block of the pawl; in the parking state, the front end part is abutted against the first bottom end, and the locking block is clamped with the ratchet wheel; under the starting state, the rear end portion is abutted to the first bottom end, and the locking block is separated from the ratchet wheel.

Preferably, the parking support includes first mounting panel and second mounting panel, the second mounting panel set up perpendicularly in the tail end of first mounting panel, and the two surface is straight, actuating mechanism set up in on the first mounting panel, the pawl pass through the pawl round pin pivot set up in on the second mounting panel, the border of first mounting panel and second mounting panel is provided with a set of mounting hole.

Preferably, a limiting groove is formed in the second mounting plate, and the bottom end of the pawl spring is clamped in the limiting groove; the front end of the second mounting plate is provided with a bending part which is bent upwards, and the top of the bending part is provided with an arc-shaped notch matched with the outer contour of the pushing block.

Preferably, the piston cylinder is arranged in a shell, a locking mechanism is arranged in the shell, the locking mechanism is positioned at the front end of the piston cylinder and is perpendicular to the piston rod, and when the piston rod moves forwards to the maximum distance, the locking mechanism is clamped with the piston rod to lock the piston rod.

Preferably, the locking mechanism comprises a locking sliding block, a parking electromagnet and an elastic end cover, a locking hole is formed in the axis of the locking sliding block, the piston rod penetrates through the locking hole, the elastic end cover is abutted to one end of the locking sliding block, so that the inner wall of the locking hole is abutted to the outer wall of the piston rod, a concave groove is formed in the piston rod, when the piston rod moves forwards to enable the concave groove to be abutted to the locking Kong Kajie, the locking mechanism locks the piston rod, and the parking electromagnet is connected with the other end of the locking sliding block to drive the locking sliding block to move towards the elastic end cover so as to release locking.

Preferably, the elastic end cover comprises a locking spring and a cover body, the cover body is embedded on the shell, and the locking spring is arranged between the cover body and the locking sliding block.

Preferably, the connecting rod assembly includes connecting piece and connecting rod, the front end of connecting rod pass through the connecting piece with the outer end rigid coupling of piston rod, the latter half of connecting rod with the piston rod is parallel, the former half of connecting rod certainly the latter half to the connecting piece slope, promote the piece set up in the tail end of latter half.

Preferably, the back half is sleeved with a return spring, one end of the return spring is abutted to a clamping block on the connecting rod, and the other end of the return spring is abutted to the front end of the pushing block, so that the pushing block can be opposite to the connecting rod in a sliding manner.

Preferably, a displacement sensor is arranged outside the housing and above the locking mechanism.

The invention also discloses a parking system which comprises a ratchet wheel and the hydraulic drive parking locking mechanism, wherein the ratchet wheel is matched and connected with the pawl.

The invention also discloses a gearbox, which comprises a gearbox shell and the hydraulic drive parking locking mechanism arranged on the shell.

The invention has the following beneficial effects:

1. the driving mechanism and the pawl are arranged in front and at the back and are in transmission connection through a connecting rod assembly parallel to the piston rod, so that the space distance between the driving mechanism and the pawl is greatly reduced, the overall size of the hydraulic parking locking mechanism is reduced, and the space occupied by a parking system is saved; the driving mechanism and the pawl are integrated on the parking support, so that the parking support can be integrally assembled and replaced, the integration degree of a parking system is improved, and the degree and efficiency of automatic production are improved;

2. the structure that the diameter of the front end part of the pushing block is larger than that of the rear end part of the pushing block enables the front end part of the pushing block to be abutted to the pawl under the condition that hydraulic oil is not arranged in the piston cylinder, so that the pawl clamps the ratchet wheel to achieve parking, the parking state is achieved when the vehicle is flamed out, the link that the vehicle is locked through other mechanisms after the vehicle stops is omitted, and the safety and the convenience of the vehicle are improved;

3. the locking mechanism is arranged on the piston rod to lock the piston rod, the maximum distance of the stroke of the piston rod is limited, the locking mechanism realizes real-time automatic locking through the elastic end cover, the elastic end cover realizes elastic pushing through the locking spring, the structure is simple, the reliability is high, locking failure of the locking mechanism is avoided, unlocking is carried out through the parking electromagnet, and convenience and rapidness are realized;

4. the connecting rod assembly is parallel to the piston rod, so that the connecting distance between the driving mechanism and the pawl can be saved to the maximum extent, and the volume of the whole equipment is saved;

5. set up return spring on the latter half of connecting rod and make to promote the piece have certain elasticity, can slide relative to the connecting rod, such structure makes when the speed of a motor vehicle is too big, and the pawl can promote and promote the piece and smooth backward for the speed of a motor vehicle is higher than unable realization parking under certain speed of a motor vehicle, improves the safety in utilization.

Drawings

The technical scheme of the invention is further explained by combining the accompanying drawings as follows:

FIG. 1: the structure of the embodiment of the invention is schematic;

FIG. 2 is a schematic diagram: a partial cross-sectional view of an embodiment of the invention;

FIG. 3: a partial cross-sectional view of an embodiment of the invention;

FIG. 4 is a schematic view of: the cross-sectional view taken along linebase:Sub>A-base:Sub>A in fig. 3.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the accompanying drawings. These embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art in light of these embodiments are intended to be within the scope of the present invention.

In the description of the schemes, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.

As shown in fig. 1 to 4, the invention discloses a hydraulically driven parking lock mechanism, which includes a parking support 1, a driving mechanism and a pawl 2 are arranged on the parking support 1, the driving mechanism includes a pressure regulating solenoid valve 3 and a piston cylinder 4 which are communicated, a piston rod 401 is coaxially arranged in the piston cylinder 4, a return spring 402 is sleeved on the piston rod 401, an outer end 4011 of the piston rod 401 protrudes out of the piston cylinder 4, the outer end 4011 is connected with a connecting rod assembly which is parallel to the piston rod 401, the connecting rod assembly extends from the outer end 4011 of the piston rod 401 to an inner end 4012 thereof and synchronously moves in the same direction as the piston rod 401, an extending end of the connecting rod assembly is provided with a pushing block 7, a diameter of the pushing block 7 close to a rear end 701 of the pawl 2 is smaller than a diameter of the front end 702 thereof far away from the pawl 2, a pawl spring 203 is arranged between a second bottom end 204 of the pawl 2 and the parking support 1, the pushing block 7 is always abutted against a first bottom end 201 of the pawl 2, and the pushing block 7 is moved in the same direction along with the piston rod so that the front end 701 or the top end 701 of the pawl 202 is changed in the same direction as the height of the pawl 401; in the parking state, the front end 702 abuts against the first bottom end 201, and the locking block 202 is clamped with a ratchet (not shown in the figure); in the activated state, the rear end 701 abuts against the first bottom end 201, and the lock block 202 is separated from the ratchet. In order to ensure the tightness between the piston rod 401 and the piston cylinder 4, a sealing ring 403 is arranged on the outer wall of the inner end 4012 of the piston rod 401.

According to the invention, the driving mechanism and the pawl 2 are arranged in front and at the back and are in transmission connection through the connecting rod assembly parallel to the piston rod 401, so that the space distance between the driving mechanism and the pawl 2 is greatly reduced, the integral volume of the hydraulic parking locking mechanism is reduced, and the driving mechanism and the pawl 2 are integrated on the parking support 1, so that the integral assembly and disassembly and replacement can be realized, the integration degree of a parking system is improved, the degree and efficiency of automatic production are improved, and the required installation space of the parking system is saved. The structure that the diameter of the front end 702 of the pushing block 7 is larger than the diameter of the rear end 701 of the pushing block makes the front end 702 of the pushing block 7 abut against the pawl 2 under the condition that hydraulic oil does not exist in the piston cylinder 4, so that the pawl 2 clamps the ratchet wheel to realize parking, the parking state is achieved when the vehicle is flamed out, the link that the vehicle is locked through other mechanisms after stopping is omitted, and the safety and the convenience of the vehicle are improved.

Specifically, as shown in fig. 1, the parking support 1 includes a first mounting plate 101 and a second mounting plate 102, the second mounting plate 102 is vertically disposed at a rear end of the first mounting plate 101, and surfaces of the first mounting plate 101 and the second mounting plate are flat. For the convenience of integral loading and unloading, the edges of the first mounting plate 101 and the second mounting plate 102 are provided with a set of mounting holes 104.

The drive mechanism is arranged on the first mounting plate 101 and the pawls 2 are pivotally arranged on the second mounting plate 102 by means of pawl pins 205. The second mounting plate 102 is provided with a limiting groove 103, the bottom end of the pawl spring 203 is clamped in the limiting groove 103 to limit the pawl spring 203, so that the pawl spring is prevented from displacing, the pawl spring is ensured to generate upward elastic force to the second bottom end 204 of the pawl 2 all the time, and the first bottom end 201 of the pawl 2 is enabled to be abutted against the pushing block 7 downwards.

Furthermore, the front end of the second mounting plate 102 has a bending part 1021 bending upwards, and the top of the bending part 1021 has an arc-shaped recess matching with the outer contour of the pushing block 7, so as to avoid obstructing the movement of the pushing block 7, avoid causing unnecessary wear to the pushing block 7, and have a certain guiding function.

The piston cylinder 4 is arranged in the shell 100, a locking mechanism is arranged in the shell 100, the locking mechanism is located at the front end of the piston cylinder 4 and is perpendicular to the piston rod 401, and when the piston rod 401 moves forwards to the maximum distance, the locking mechanism is clamped with the piston rod 401 to lock the piston rod 401. The locking mechanism is arranged to limit the maximum distance of travel of the piston rod 401 by locking the piston rod 401.

Specifically, as shown in fig. 3 and 4, the locking mechanism includes a locking slider 8, a parking electromagnet 9 and an elastic end cover 10, a locking hole 801 is formed in the axis of the locking slider 8, the piston rod 401 penetrates through the locking hole 801, the elastic end cover 10 abuts against one end of the locking slider 8, so that the inner wall of the locking hole 801 abuts against the outer wall of the piston rod 401, a concave groove 4013 is formed in the piston rod 401, when the piston rod 401 moves forward, so that the concave groove 4013 is clamped with the locking hole 801, the locking mechanism locks the piston rod 401, and the parking electromagnet 9 is connected with the other end of the locking slider 8 to drive the locking slider 8 to move towards the elastic end cover 10 to release locking.

The elastic end cap 10 includes a locking spring 1001 and a cover 1002, the cover 1002 is embedded in the housing 100, and the locking spring 1001 is disposed between the cover 1002 and the locking slider 8. The elastic force of the locking spring 1001 keeps the inner wall of the locking hole 801 in contact with the outer wall of the piston rod 401, and in order to reduce the obstruction of the locking hole 801 to the movement of the piston rod 401, the inner wall of the locking hole 801 is preferably rounded so that it more closely matches the piston rod 401. Real-time automatic locking is realized through elastic end cover 10 to locking mechanism, elastic end cover 10 realizes its elasticity through locking spring 1001 and promotes, and simple structure and reliability are high, avoid locking mechanism locking inefficacy to unblock, convenient and fast is carried out through parking electro-magnet 9.

The connecting rod assembly includes connecting piece 5 and connecting rod 6, the front end of connecting rod 6 pass through connecting piece 5 with the outer end 4011 rigid coupling of piston rod 401, the latter half 601 of connecting rod 6 with piston rod 401 is parallel, the first half 602 of connecting rod 6 certainly latter half 601 to connecting piece 5 slope, promote piece 7 set up in the tail end of latter half 601. The connecting rod assembly is parallel to the piston rod 401, so that the connecting distance between the driving mechanism and the pawl 2 can be saved to the greatest extent, and the volume of the whole device is saved.

Further, the rear half 601 is sleeved with a return spring 603, one end of the return spring 603 abuts against a clamping block 604 on the connecting rod 6, and the other end of the return spring 603 abuts against the front end 702 of the pushing block 7, so that the pushing block 7 can slide relative to the connecting rod 6. The return spring 603 is in abutting connection with the pushing block 7 through elasticity of the return spring, so that the return spring can slide relative to the connecting rod 6, and due to the structure, when the vehicle speed is too high, the pawl 2 pushes the pushing block 7 to slide backwards due to the ratchet wheel, so that the parking can not be realized when the vehicle speed is higher than a certain vehicle speed, and the use safety is improved. The safe vehicle speed in the present preferred embodiment is 3.5km/h, and when the vehicle speed is higher than 3.5km/h, parking is not performed.

In order to further improve the control of the parking lock mechanism, a displacement sensor 11 is provided outside the housing 100 above the lock mechanism. The displacement sensor 11 monitors the displacement distance of the connecting rod assembly in real time, and performs closed-loop control on the gear shifting process, so that parking is safer and more reliable.

In addition, the invention also discloses a parking system, which comprises the hydraulic drive parking locking mechanism and other necessary parts of the parking system, such as a ratchet wheel and the like, which are the prior art and are not described herein again. The invention also discloses a gearbox, which comprises a gearbox shell (not shown in the figure) and the parking system arranged on the gearbox shell, wherein the hydraulically-driven parking locking mechanism can be arranged on the gearbox shell in a self-assembled mode, can be integrally taken down when replaced, and is convenient and reliable.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a hydraulic drive parking locking mechanism which characterized in that: including a parking support (1), be provided with actuating mechanism and pawl (2) on parking support (1), actuating mechanism is including pressure regulating solenoid valve (3) and piston cylinder (4) that are linked together, coaxial piston rod (401) that is equipped with in piston cylinder (4), the cover is equipped with reset spring (402) on piston rod (401), outer end (4011) evaginate in piston cylinder (4), outer end (4011) is connected with a connecting rod assembly, the connecting rod assembly certainly outer end (4011) of piston rod (401) extend to its inner end (4012) direction, and with the synchronous syntropy of piston rod (401) removes, the extension end of connecting rod assembly has one and promotes piece (7), it is close to promote piece (7) the diameter of rear end portion (701) of pawl (2) is less than it keeps away from the diameter of front end portion (702) of pawl (2), the second bottom (204) of pawl (2) with be provided with parking spring (203) between support (1), promote piece (7) with first bottom (701) butt (2) make first piston rod (701) move to the synchronous syntropy of piston rod (401) end portion (201) or the first end portion (701) of pushing block (7), to vary the height of the top locking block (202) of the pawl (2); in the parking state, the front end (702) is abutted against the first bottom end (201), and the locking block (202) is clamped with the ratchet wheel; in the starting state, the rear end part (701) is abutted against the first bottom end (201), and the locking block (202) is separated from the ratchet wheel; the locking mechanism comprises a locking sliding block (8), a parking electromagnet (9) and an elastic end cover (10), a locking hole (801) is formed in the axis of the locking sliding block (8), the piston rod (401) penetrates through the locking hole (801), the elastic end cover (10) is abutted to one end of the locking sliding block (8), so that the inner wall of the locking hole (801) is abutted to the outer wall of the piston rod (401), a concave groove (4013) is formed in the piston rod (401), when the piston rod (401) moves forwards to enable the concave groove (4013) to be clamped with the locking hole (801), the locking mechanism locks the piston rod (401), the parking electromagnet (9) is connected to the other end of the locking sliding block (8) to drive the locking sliding block (8) to move towards the elastic end cover (10), and locking is released; the elastic end cover (10) comprises a locking spring (1001) and a cover body (1002), the cover body (1002) is embedded on the shell (100), and the locking spring (1001) is arranged between the cover body (1002) and the locking sliding block (8).

2. The hydraulically actuated parking lock mechanism of claim 1, wherein: parking support (1) includes first mounting panel (101) and second mounting panel (102), second mounting panel (102) set up perpendicularly in the tail end of first mounting panel (101), and the surface of the two is straight, actuating mechanism set up in on first mounting panel (101), pawl (2) through pawl round pin (205) pivot set up in on second mounting panel (102), the border of first mounting panel (101) and second mounting panel (102) is provided with a set of mounting hole (104).

3. The hydraulically actuated parking lock mechanism of claim 2, wherein: a limiting groove (103) is formed in the second mounting plate (102), and the bottom end of the pawl spring (203) is clamped in the limiting groove (103); the front end of the second mounting plate (102) is provided with a bending part (1021) which is bent upwards, and the top of the bending part (1021) is provided with an arc-shaped notch matched with the outer contour of the pushing block (7).

4. The hydraulically actuated parking lock mechanism of claim 3, wherein: the piston cylinder (4) is arranged in a shell (100), a locking mechanism is arranged in the shell (100), the locking mechanism is located at the front end of the piston cylinder (4) and perpendicular to the piston rod (401), and when the piston rod (401) moves forwards to the maximum distance, the locking mechanism is clamped with the piston rod (401) to lock the piston rod (401).

5. The hydraulically actuated parking lock mechanism of claim 4, wherein: the connecting rod assembly comprises a connecting piece (5) and a connecting rod (6), the front end of the connecting rod (6) is fixedly connected with the outer end (4011) of the piston rod (401) through the connecting piece (5), the rear half part (601) of the connecting rod (6) is parallel to the piston rod (401), the front half part (602) of the connecting rod (6) inclines towards the connecting piece (5) from the rear half part (601), and the pushing block (7) is arranged at the tail end of the rear half part (601); the back half (601) is sleeved with a return spring (603), one end of the return spring (603) is abutted to a clamping block (604) on the connecting rod (6), and the other end of the return spring is abutted to a front end portion (702) of the pushing block (7), so that the pushing block (7) can be opposite to the connecting rod (6) in a sliding manner.

6. The hydraulically actuated parking lock mechanism of claim 1, wherein: and a displacement sensor (11) is arranged outside the shell (100) and above the locking mechanism.

7. A parking system characterized by: comprising a ratchet wheel coupled to said pawl (2), and a hydraulically actuated parking lock mechanism according to any of claims 1-6.

8. A transmission, characterized by: comprising a transmission housing, and a hydraulically actuated parking lock mechanism as claimed in any one of claims 1 to 6 provided on said transmission housing.