CN211117252U

CN211117252U - Drum brake

Info

Publication number: CN211117252U
Application number: CN201922069176.3U
Authority: CN
Inventors: 许志明; 许文涛
Original assignee: Changxing Luola Electromechanical Co ltd
Current assignee: Changxing Luola Electromechanical Co ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-07-28
Anticipated expiration: 2029-11-26

Abstract

The utility model discloses a drum is stopped belongs to the brake equipment field, including the shell, install in a pair of brake shoe piece and brake subassembly in the shell, the both ends of brake shoe piece are hinged end and free end respectively, the brake subassembly includes the brake axle, installs the epaxial brake wheel of brake, the free end sets up relatively the brake wheel both sides, the hinged end with fixed column in the shell is articulated, the hinged end with be equipped with first damping piece between the fixed column, damping piece is used for absorbing the brake shoe piece with vibration between the shell production. The utility model discloses an increase the noise that the damping member has reduced in the drum braking process and has produced because of the vibration, increased user's use and experienced.

Description

Drum brake

[ technical field ] A method for producing a semiconductor device

The utility model relates to a brake equipment field especially relates to a drum is stopped.

[ background of the invention ]

The drum is stopped, and the cost is lower, absolute braking force is powerful, therefore use the history of on the vehicle nearly a century, among the prior art, the drum is stopped including the casing, two brake shoes and ejector pad, and in the braking process, the ejector pad promotes the outside removal of brake shoe and pastes tight casing to and produce the friction between the casing so that casing stall, reach the purpose of braking, nevertheless because the friction between brake shoe and the shell can produce the vibration, can produce the noise in the vibration process, influence user's experience.

Therefore, a drum brake capable of reducing noise is required according to the demand.

[ Utility model ] content

The utility model aims to solve the technical problem that overcome prior art not enough and provide a drum and stop, reduced the noise that produces because of the vibration in the drum braking process, increased user's use and experienced.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a drum brake comprises a shell, a pair of brake shoes and a brake assembly, wherein the brake shoes and the brake assembly are installed in the shell, two ends of each brake shoe are respectively provided with a hinged end and a free end, each brake assembly comprises a brake shaft and a brake wheel installed on the brake shaft, the free ends are oppositely arranged on two sides of the brake wheel, the hinged ends are hinged to fixed columns in the shell, a first vibration damping piece is arranged between the hinged ends and the fixed columns, and the vibration damping pieces are used for absorbing vibration between the brake shoes and the shell.

First damping piece has the ability of absorption vibration, when drum braking, the brake shoe makes the constant striking fixed column of hinged end of brake shoe because of friction with the shell, striking in-process can be continuous produces the noise, after having set up first damping piece, the object of hinged end striking is changed into first damping piece by the fixed column, make the vibration absorbed and reduce the noise that the collision produced by first damping piece, even on vibration still transmits the fixed column, the collision sound of sending also can be weakened under the effect of first damping piece, thereby can increase user's experience.

Furthermore, the hinged end is provided with an arc-shaped groove with a shape corresponding to the fixed column, and the two brake shoes are oppositely arranged on two sides of the fixed column to enable the two arc-shaped grooves to limit the accommodating groove around the fixed column. First damping piece sets up in the holding tank to in the absorption weaken the brake shoe collision to the fixed column, the shape of arc wall can be guaranteed to keep in braking process with the laminating of first damping piece, can all absorb the vibration of transmission from the brake shoe piece under any circumstance, can avoid the contact of the arbitrary position of hinged end and fixed column, the shock attenuation is effectual.

Further, first damping piece sets up in the holding tank and encircle outside the fixed column. The first vibration damping piece is an annular vibration damping piece, can absorb the collision to the fixed column transmitted from any direction, is convenient to mount and can be directly sleeved outside the fixed column.

Furthermore, the first vibration reduction piece is arranged in the arc-shaped groove and is tightly attached to the inner wall of the arc-shaped groove. First damping piece is located the arc wall, is located between hinged end and the fixed column equally, and the rigidity of first damping piece, the displacement receives the restriction, can guarantee to keep best damping effect at braking in-process.

Furthermore, the fixing column is provided with a limiting part for axially limiting the first vibration damping part or a positioning part for axially positioning the vibration damping part. The locating part can keep the laminating of hinged end and first damping piece with first damping piece restriction between hinged end and fixed column, maintains best damping effect, can make vibration homodisperse to whole first damping piece on, prevents first damping piece local deformation, and the setting element then can allow first damping piece to have certain, the displacement that does not influence the damping effect in the axial.

The utility model provides a drum brake, includes the shell, install in a pair of brake shoe and brake subassembly in the shell, the both ends of brake shoe are hinged end and free end, the hinged end with fixed post in the shell is articulated, brake subassembly includes the brake axle, installs epaxial brake wheel of brake, the free end sets up relatively the brake wheel both sides, the brake axle with the shell rotates to be connected, the brake axle with be equipped with second damping piece between the shell, second damping piece is used for absorbing the brake shoe with the vibration that produces between the shell.

In the braking process, the shell generates vibration due to friction between the brake shoe and the shell, the shell continuously collides with the brake shaft to generate noise, and after the second vibration damping piece is arranged, the impact of the shell on the brake shaft is absorbed by the second vibration damping piece, so that the noise generated in the braking process is weakened, and the effect of the noise is the same as that of the first vibration damping piece.

Furthermore, the shell is provided with a shaft hole for accommodating the brake shaft, and the brake shaft is in running fit with the shaft hole. The shaft hole provides the passageway that stretches into the shell for the brake axle and provides installation space for second damping piece, and in braking process, the shaft hole pore wall can bump with the brake axle, and the second damping piece can absorb the striking of shaft hole pore wall to the brake axle.

Further, the second damping piece is arranged in the shaft hole and surrounds the brake shaft. The second vibration damping piece surrounds outside the brake shaft, so that the brake shaft can be prevented from colliding with the inner wall of the shaft hole when the drum brake is used for braking, vibration generated by collision between the brake shaft and the inner wall of the shaft hole is absorbed, the second vibration damping piece is an annular vibration damping piece, and the installation is convenient and simple.

Further, the second damping piece is limited in the shaft hole by the brake wheel. The brake wheel stops the second vibration damping piece to keep the second vibration damping piece in full contact with the shaft hole in the braking process, so that vibration is dispersed to the whole second vibration damping piece, and the second vibration damping piece is prevented from being locally deformed.

Further, the second vibration damping parts are arranged on the inner wall of the shaft hole at intervals along the circumferential direction. The second damping piece is fixed at the shaft hole inner wall, and the displacement receives the restriction, consequently can not take place to rock, remains throughout at best damping state to there is the clearance between the second damping piece, has great deformation space, helps the absorption to the vibration.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The invention will be further explained with reference to the drawings:

fig. 1 is a schematic structural view of a first drum brake according to an embodiment of the present invention;

fig. 2 is a top view of a brake shoe according to an embodiment of the present invention;

fig. 3 is an exploded view of a brake shoe according to a first embodiment of the present invention;

fig. 4 is a top view of a brake shoe according to a second embodiment of the present invention;

fig. 5 is a schematic structural view of a second drum brake in the embodiment of the present invention;

fig. 6 is a schematic structural diagram of a housing in the fourth embodiment of the present invention;

fig. 7 is a schematic structural view of a fifth-middle drum brake according to an embodiment of the present invention.

Reference numerals:

the elastic restoring device comprises a shell 100, a fixed column 110, a first restoring piece 120, an annular spring rod 121, a bent end 122, a second restoring piece 130 and a shaft hole 140;

the brake shoe 200, the hinge end 210, the receiving groove 211, the free end 220, the first insertion hole 230, the second insertion hole 240 and the arc-shaped groove 250;

the brake assembly 300, the brake shaft 310, the brake wheel 320, the roller 330 and the limit plate 340;

a first damping member 400, a second damping member 410, a limiting member 420;

the device 500 is driven.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example one

Referring to fig. 1, the utility model provides a drum brake, including shell 100, install a pair of brake shoe 200 and brake assembly 300 in shell 100, the both ends of brake shoe 200 are hinged end 210 and free end 220 respectively, brake assembly 300 includes brake axle 310, install the brake wheel 320 on brake axle 310, free end 220 sets up in brake wheel 320 both sides relatively, hinged end 210 is articulated with the fixed column 110 in the shell 100, be equipped with first damping piece 400 between hinged end 210 and the fixed column 110, damping piece is used for absorbing the vibration between brake shoe 200 and the production of shell 100.

The brake wheel 320 has two rollers 330, the free ends 220 are respectively kept engaged with the two rollers 330, during braking, the brake wheel 320 rotates to make the two rollers 330 push the free end 220 to move towards the housing 100, and the engagement can ensure that the rollers 330 are kept in contact with the free end 220, making the braking more responsive, as the rolling brake shoes 200 of the brake wheel 320 begin to rub against the housing 100, so that the hinged end 210 of the brake shoe 200 continuously impacts the fixing post 110, noise is continuously generated during the impact process, after the first vibration dampers 400 are provided, the object struck by the hinge end 210 is changed from the fixing column 110 to the first vibration dampers 400, so that vibration is absorbed by the first vibration dampers 400 and noise generated by collision is reduced, even if vibration is still transmitted to the fixing post 110, the emitted impact sound is attenuated by the first vibration dampers 400, so that the user experience can be increased.

First damping piece 400's material is rubber class material such as rubber, silica gel, is rich in elasticity, can produce great deformation under very little exogenic action, can the reconversion after removing external force, when receiving the collision of brake shoe 200, turns into the power of first damping piece 400 deformation with the power of collision to reach the purpose of eliminating the vibration, can resume fast after the deformation, can not leave the vestige, use for a long time.

Referring to fig. 2 and 3, a first reset member 120 and a second reset member 130 are disposed between two brake shoes 200, each brake shoe 200 has a first insertion hole 230 and a second insertion hole 240 protruding from two positions, the first insertion hole 230 is close to a free end 220, the second insertion hole 240 is close to a hinged end 210, the first reset member 120 is a ring-shaped spring rod 121 having an opening, two bent ends 122 are formed at the opening of the ring-shaped spring rod 121, the bent ends 122 are inserted into the first insertion hole 230 to complete connection with the brake shoes 200, the ring-shaped spring rod 121 is attached to the brake shoes 200, the second reset member 130 is a tension spring, and two ends of the tension spring are respectively inserted into the two second insertion holes 240.

Under the action of the first and

second reset members

120 and 130, the hinged end 210 is kept outside the fixed column 110, the free end 220 is kept in contact with the roller 330, and can be reset quickly after braking is finished, the position change at the free end 220 is large in the braking process, and the anti-breaking capacity of the tension spring is inferior to that of the annular spring rod 121, so that the tension spring is not used as a reset member at the free end 220, and the protruding insertion hole can limit the annular spring rod 121 between the brake shoe 200 and the shell 100, so that the displacement of the annular spring rod in the axial direction of the drum brake is limited.

Example two

On the basis of the first embodiment, the present embodiment illustrates how the damping member is disposed between the hinged end 210 and the fixed column 110, specifically: referring to fig. 1, the hinged end 210 has an arc-shaped groove 250 with a shape corresponding to the fixed column 110, two brake shoes 200 are oppositely arranged on two sides of the fixed column 110, so that the two arc-shaped grooves 250 define an accommodating groove 211 surrounding the fixed column 110, a first vibration damping part 400 is arranged in the accommodating groove 211, so as to absorb and weaken the collision of the brake shoes 200 on the fixed column 110, the shape of the arc-shaped groove 250 can ensure that the first vibration damping part 400 is attached to the arc-shaped groove in the braking process, the vibration transmitted from the brake shoes 200 can be absorbed under any condition, the contact between the hinged end 210 and any part of the fixed column 110 can be avoided, and the vibration damping effect is good.

First damping piece 400 is annular rubber spare, resets under 130 effects at the second, and arc wall 250 remains throughout with first damping piece 400 laminating in braking process, and first damping piece 400 can all absorb the vibration of following transmission on the brake shoe 200 under any circumstance, can avoid the contact of articulated end 210 and the arbitrary position of fixed column 110, and the damping is effectual.

The first vibration damping piece 400 and the fixed column 110 can be in clearance fit or interference fit, when the fit mode is clearance fit, the first vibration damping piece 400 has axial and radial displacement, the installation is convenient, and only the first vibration damping piece 400 is required to be sleeved on the outer side of the fixed column 110; when the fitting manner is interference fit, the first vibration damping member 400 is tightly attached to the fixing column 110 and kept tightened, the first vibration damping member 400 is kept stable to maintain an optimal vibration damping state, and the axial displacement amount is extremely small.

First damping piece 400 has certain axial displacement trend, if the position at the axial direction changes, when hinged end 210 collides with first damping piece 400, hinged end 210 can only contact with the local of first damping piece 400, make the local of first damping piece 400 take place deformation, in order to keep first damping piece 400 can contact with hinged end 210 completely, eliminate local deformation and keep the best damping effect, be equipped with the locating part 420 of restriction first damping piece 400 displacement on fixed column 110, in addition, also can set up the setting element, in order to allow first damping piece 400 to have certain, the displacement that does not influence the damping effect in the axial.

Referring to fig. 4, in addition, the first vibration damping member 400 may also be an arc-shaped rubber member arranged in the arc-shaped groove 250 and having a shape corresponding to that of the fixed column 110, the arc-shaped rubber member may be kept attached to the fixed column 110, the same vibration damping effect as that of the annular rubber member may be achieved, and the step of installing the first vibration damping member 400 may be skipped; the axial displacement and the radial displacement of the arc-shaped rubber piece are limited, so that the optimal vibration damping state can be kept.

EXAMPLE III

The utility model provides another kind of drum brake with noise reduction effect, refer to fig. 5, including shell 100, install a pair of brake shoe 200 and brake subassembly 300 in shell 100, the both ends of brake shoe 200 are hinged end 210 and free end 220, hinged end 210 is articulated with fixed column 110 in the shell 100, brake subassembly 300 includes brake axle 310, install brake wheel 320 on brake axle 310, free end 220 sets up in brake wheel 320 both sides relatively, brake axle 310 rotates with shell 100 to be connected, be equipped with second damping piece 410 between brake axle 310 and the shell 100, second damping piece 410 is used for absorbing the vibration that produces between brake shoe 200 and the shell 100.

During braking, the brake shoe 200 and the housing 100 generate vibration due to friction, the housing 100 continuously collides with the brake shaft 310 to generate noise, and after the second damping member 410 is disposed, the impact of the housing 100 on the brake shaft 310 is absorbed by the second damping member 410, so that the noise generated during braking is weakened, which has the same function as the first damping member 400.

The second damping member 410 is made of rubber material, which is the same as the first damping member 400 in the first embodiment, wherein the two types of drum brakes have the same structure except for the position where the damping member is arranged.

Example four

In the present embodiment, on the basis of the third embodiment, how the second damping member 410 is disposed between the housing 100 and the brake shaft 310 is described, specifically: referring to fig. 5 and 6, the casing 100 is provided with a shaft hole 140 for accommodating the brake shaft 310, the brake shaft 310 is rotatably matched with the shaft hole 140, the bottom of the casing 100 is provided with a driving device 500 for connecting a brake cable, the driving device 500 is engaged with the brake shaft 310, the brake shaft 310 is engaged with the driving device 500 and then passes through the shaft hole 140 to extend to a position between the free ends 220, the second vibration damping member 410 is an annular rubber member positioned in the shaft hole 140 and surrounding the outside of the brake shaft 310, the second vibration damping member 410 surrounds the outside of the brake shaft 310, when the brake is braked, the wall of the shaft hole 140 collides with the brake shaft 310, and the second vibration damping member 410 can prevent the brake shaft 310 from colliding with the inner wall of the shaft hole 140 and absorb vibration generated by collision.

The driving device 500 is connected to a brake cable, and pulling the brake cable during braking can control the driving device 500 to operate to rotate the brake shaft 310 and the brake wheel 320, thereby pushing the brake shoe 200 to contact the housing 100 for friction braking.

The installation fit of second vibration damper 410 in shaft hole 140 may be a clearance fit or an interference fit, and when the fit is a clearance fit, second vibration damper 410 has axial and radial displacements; when the fitting manner is interference fit, the second vibration damping member 410 may be in interference fit with the brake shaft 310, the second vibration damping member 410 is tightly attached to the brake shaft 310 and kept taut, or the second vibration damping member 410 is in interference fit with the shaft hole 140, and the second vibration damping member 410 is kept tightly attached to the shaft hole 140, at this time, part of the second vibration damping member 410 will deform to cause arching, and the second vibration damping member 410 is easily damaged in long-time use, and in addition, the second vibration damping member 410 may also be kept in interference fit with the shaft hole 140 and the brake shaft 310, although there is an excellent vibration damping effect, the brake shaft 310 needs to overcome a large friction force when rotating, and therefore when the fitting manner is interference fit, the preferable scheme is interference fit of the second vibration damping member 410 and the brake shaft 310.

The brake shaft 310 is further provided with two limit plates 340, the limit plates 340 are respectively arranged on the upper surface and the lower surface of the brake wheel 320, the roller 330 is located between the two limit plates 340, the lower limit plate 340 can stop the second vibration damping piece 410, and the second vibration damping piece 410 is limited in the shaft hole 140 so as to ensure good vibration damping and noise reduction capabilities.

Second damping piece 410 still has another kind of setting mode, can be for fixing a plurality of rubber spare in shaft hole 140 circumference, and the rubber spare is fixed at shaft hole 140 inner wall, and the displacement receives the restriction, consequently can not take place to rock, remains throughout at best damping state, has the clearance between the rubber spare, has great deformation space, helps the absorption to the vibration.

EXAMPLE five

The drum brake of the present embodiment has the same structure as that of the drum brake of the above embodiment, except that the drum brake of the present embodiment has two vibration damping members respectively disposed in the receiving groove 211 and the shaft hole 140, and the best vibration damping effect is achieved by disposing the vibration damping members at two positions, referring to fig. 7.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims

1. The utility model provides a drum is stopped, includes the shell, install in a pair of brake shoe and brake subassembly in the shell, the both ends of brake shoe are hinged end and free end respectively, brake subassembly include the brake axle, install the epaxial brake wheel of brake, the free end sets up relatively the brake wheel both sides, the hinged end with fixed post in the shell is articulated, its characterized in that: and a first vibration damping part is arranged between the hinged end and the fixing column and is used for absorbing vibration generated between the brake shoe and the shell.

2. The drum brake of claim 1, wherein: the hinged end is provided with an arc-shaped groove with a shape corresponding to the fixed column, and the two brake shoes are oppositely arranged on two sides of the fixed column to enable the two arc-shaped grooves to limit an accommodating groove around the fixed column.

3. The drum brake of claim 2, wherein: the first vibration reduction piece is arranged in the accommodating groove and surrounds the fixing column.

4. The drum brake of claim 2, wherein: the first vibration reduction piece is arranged in the arc-shaped groove and is tightly attached to the inner wall of the arc-shaped groove.

5. A drum brake according to claim 3 wherein: and the fixing column is provided with a limiting part for axially limiting the first vibration damping part or a positioning part for axially positioning the vibration damping part.

6. The utility model provides a drum is stopped, includes the shell, install in a pair of brake shoe and brake subassembly in the shell, the both ends of brake shoe are hinged end and free end, the hinged end with fixed post in the shell is articulated, the brake subassembly include the brake axle, install the epaxial brake wheel of brake, the free end sets up relatively the brake wheel both sides, its characterized in that: the brake shaft is rotatably connected with the shell, a second vibration damping piece is arranged between the brake shaft and the shell, and the second vibration damping piece is used for absorbing vibration generated between the brake shoe and the shell.

7. The drum brake of claim 6, wherein: the shell is provided with a shaft hole for accommodating the brake shaft, and the brake shaft is in running fit with the shaft hole.

8. The drum brake of claim 7, wherein: the second damping piece is arranged in the shaft hole and surrounds the brake shaft.

9. The drum brake of claim 8, wherein: the second damping piece is limited in the shaft hole by the brake wheel.

10. The drum brake of claim 7, wherein: the second vibration damping pieces are arranged on the inner wall of the shaft hole at intervals along the circumferential direction.