Parking fixed clamp piston anti-rotation assembly

Abstract

The invention relates to the technical field of parking fixed clamps, in particular to a parking fixed clamp piston anti-rotation assembly which comprises a clamp body, a first threaded rod and a second threaded rod, the first threaded rod and the second threaded rod are both movably connected into the clamp body, and a first gear is coaxially and fixedly connected to the surface of the first threaded rod; a fourth gear is coaxially connected to the surface of the second threaded rod in a threaded mode, a transmission assembly is connected between the first gear and the fourth gear, the right end of the first threaded rod is coaxially sleeved with a threaded sleeve in a threaded mode, and pistons are coaxially and fixedly connected to the faces, opposite to the second threaded rod, of the threaded sleeve; a plurality of limiting strips arranged in an annular array are coaxially and fixedly connected to the surface of the threaded sleeve, a limiting square plate is fixedly connected to the right end of the second threaded rod, and the problem that when the screw rod and the screw rod sleeve work, if a piston and the screw rod sleeve rotate, the parking clamping force of the parking fixed clamp is likely to be insufficient is solved.

Description

Technical Field

[0001] The invention relates to the technical field of parking calipers, in particular to a parking caliper piston anti-rotation assembly. Background Art

[0002] The main function of the fixed caliper is to slow down, stop or keep the moving wheels in a stopped state. It achieves braking and parking effects through friction with the brake disc. The fixed caliper is usually composed of brake pads, parking pads, pistons, caliper bodies and other components. The caliper body of the fixed caliper is fixedly mounted on the axle and cannot rotate or move along the axis of the brake disc. The brake pads and parking pads are installed inside the caliper body, and both contact the brake disc through the action of the piston to generate braking force. The parking caliper piston mainly plays the role of pushing the parking pad to contact the brake disc, thereby generating braking force. During service braking, the hydraulic system transfers pressure to the piston, so that the piston pushes the brake pad to clamp the brake disc, thereby achieving vehicle deceleration and stopping. During parking braking, the parking brake mechanism pushes the piston mechanically to make the parking block tightly press the brake disc to ensure that the vehicle does not move when stationary.

[0003] The parking brake mechanism pushes the piston mechanically, and mainly includes a motor, a parking block, a piston and a screw. The screw is covered with a sleeve. When the parking clamp is parked, the torque output by the motor acts on the screw to rotate the screw. The screw and the sleeve thread cooperate, and the parking clamping force is transmitted to the piston through the axial linear movement of the sleeve. The piston then transmits the parking clamping force to the brake block, and the brake block clamps the brake disc, thereby realizing the parking brake of the vehicle.

[0004] However, when the screw and the screw sleeve are working, the rotation of the screw will generate axial force and rotational force on the screw sleeve, and then transmit the axial force and rotational force to the piston. If the piston and the screw sleeve rotate, it is easy for the piston to not be pushed outward, and it is also easy for the parking block's parking clamping force to fluctuate, increasing the risk of the vehicle slipping. Summary of the invention

[0005] The object of the present invention is to provide a parking caliper piston anti-rotation assembly to solve the problem that when the screw and the screw sleeve are working, if the piston and the screw sleeve rotate, the parking clamping force of the parking caliper is insufficient.

[0006] To achieve the above object, the present invention provides the following technical solutions: A parking clamp piston anti-rotation assembly comprises a clamp body, a first threaded rod and a second threaded rod, the first threaded rod and the second threaded rod are both movably connected to the clamp body, the surface of the first threaded rod is coaxially fixedly connected to the first gear, the surface of the second threaded rod is coaxially threadedly connected to the fourth gear, a transmission assembly is connected between the first gear and the fourth gear, the right end of the first threaded rod is coaxially threadedly provided with a threaded sleeve, the threaded sleeve and the second threaded rod are coaxially fixedly connected to the piston on the surface, a plurality of limit strips arranged in a ring array are coaxially fixedly connected to the surface of the threaded sleeve, the right end of the second threaded rod is fixedly connected to the limit square plate, the interior of the clamp body is provided with a first limit slide groove for the linear movement of the limit strip, and the interior of the clamp body is provided with a second limit slide groove for the linear movement of the limit square plate.

[0007] Preferably, the caliper body is provided with a plurality of filling components, and the plurality of filling components are respectively used to fill the gaps caused by the wear of the limiting insert and the limiting square plate.

[0008] Preferably, the filling assembly comprises a filling block and a filling sheet, each of the two sides of the limiting strip has a filling block, and each of the filling blocks and the limiting strip has a filling sheet between them.

[0009] Preferably, a plurality of push blocks are installed in the clamp body, each of the push blocks is used in a one-to-one correspondence with a filling block, and the push blocks are used to squeeze the filling block to move and fill the gap.

[0010] Preferably, the surface of each of the pushing blocks in contact with the filling block is set as a first inclined surface, and the pushing block moves downward and squeezes the filling block to move horizontally with the first inclined surface.

[0011] Preferably, a plurality of auxiliary blocks are installed in the caliper body, one side of each of the auxiliary blocks is in contact with the surface of the filling block, the other side of each of the auxiliary blocks is set as a fourth inclined surface, the caliper body has a first inclined wall matching the fourth inclined surface, and the top end of the auxiliary block is slidably connected to the bottom end of the push block.

[0012] Preferably, the surface of the threaded sleeve is provided with an auxiliary embedding groove for the auxiliary block to embed.

[0013] Preferably, the surfaces of the two pistons are provided with limit grooves, and a plurality of evenly distributed limit blocks are rotatably connected in the caliper body. The plurality of limit blocks are respectively used in conjunction with the limit grooves provided on the two pistons, and the limit grooves are used for the limit blocks to be rotatably embedded when parking.

[0014] Preferably, the upper and lower ends of each of the limit inserts are fixedly connected with a rotating shaft, the rotating shaft and the clamp body are rotationally connected, and a torsion spring is fixedly connected between the limit insert and the clamp body.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting a limit bar, when the limit bar is in the first limit slot, the threaded sleeve can only move linearly but cannot rotate, so that the piston connected thereto cannot rotate, thereby achieving the purpose of anti-rotation; by setting a limit square plate, when the limit square plate is in the second limit slot, the second threaded rod can only move linearly but cannot rotate, so that the piston connected thereto cannot rotate, thereby achieving the purpose of anti-rotation; 2. By setting up a filling component, when the limit bar or the limit square plate is worn, the filling block is moved toward the limit bar to fill the gap caused by wear. Filling the gap caused by wear in time is helpful to prevent the anti-rotation ability from decreasing; 3. By setting the limit insert, when the two parking blocks clamp the brake disc for parking, the piston will tend to rotate. By rotating the limit insert and embedding it into the limit insert groove, the rotation of the piston can be directly limited, which is beneficial to strengthen the strength of limiting the rotation of the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A front cross-sectional view of the present invention as a whole; Figure 2 It is a structural schematic diagram of the transmission assembly of the present invention; Figure 3 It is a structural schematic diagram of the threaded sleeve of the present invention; Figure 4 It is a structural schematic diagram of the limiting square plate of the present invention; Figure 5 It is a partial left sectional view of the present invention; Figure 6 For the present invention Figure 5 The enlarged view of point A in the middle; Figure 7 It is a structural schematic diagram of the push block of the present invention; Figure 8 It is a structural schematic diagram of the auxiliary block of the present invention; Fig. 9 A top sectional view of a part of the present invention; Fig.10 It is a schematic diagram of the state of the limiting insert block in the parking state of the present invention; Fig.11 It is a schematic structural diagram of the limiting insert of the present invention.

[0017] In the figure: 1, clamp body; 2, first threaded rod; 3, threaded sleeve; 4, limit strip; 5, piston; 6, limit embedded groove; 7, limit embedded block; 8, rotating shaft; 9, torsion spring; 10, avoidance groove; 11, first gear; 12, second gear; 13, transmission rod; 14, third gear; 15, fourth gear; 16, second threaded rod; 17, limit square plate; 18, second limit slide groove; 19, push block; 20, first inclined surface; 21, T-shaped inclined block; 22, T-shaped inclined groove; 23, auxiliary block; 24, second inclined surface; 25, third inclined surface; 26, fourth inclined surface; 27, auxiliary embedded groove; 28, filling block; 29, filling sheet; 30, parking block. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figures 1 to 11 , the present invention provides a technical solution.

[0020] A parking caliper piston anti-rotation assembly comprises a caliper body 1, a first threaded rod 2 and a second threaded rod 16, wherein the first threaded rod 2 and the second threaded rod 16 are both movably connected in the caliper body 1, a first gear 11 is coaxially fixedly connected to the surface of the first threaded rod 2, a fourth gear 15 is coaxially threadedly connected to the surface of the second threaded rod 16, a transmission assembly is connected between the first gear 11 and the fourth gear 15, and the transmission assembly is used to make the first gear 11 and the fourth gear 15 rotate synchronously. When the motor drives the first threaded rod 2 to rotate, the rotation of the first threaded rod 2 drives the first gear 11 to rotate, and the fourth gear 15 rotates synchronously through the transmission assembly. The right end of the first threaded rod 2 is coaxially threadedly provided with a threaded sleeve 3, and the threaded sleeve 3 is coaxially fixedly connected to the second threaded rod 16 on one side thereof. The surface of the plug 5 and the threaded sleeve 3 are coaxially fixedly connected with a plurality of limit strips 4 arranged in a circular array, the right end of the second threaded rod 16 is fixedly connected with a limit square plate 17, and the interior of the caliper body 1 is provided with a first limit slot for the limit strip 4 to move linearly, and the interior of the caliper body 1 is provided with a second limit slot 18 for the limit square plate 17 to move linearly. By setting the limit strip 4, when the limit strip 4 is in the first limit slot, the threaded sleeve 3 can only move linearly but not rotate, so that the piston 5 connected thereto cannot rotate, thereby achieving the purpose of anti-rotation. By setting the limit square plate 17, when the limit square plate 17 is in the second limit slot 18, the second threaded rod 16 can only move linearly but not rotate, so that the piston 5 connected thereto cannot rotate, thereby achieving the purpose of anti-rotation.

[0021] Please refer to Figure 1 and Figure 2 The transmission assembly includes a second gear 12, a transmission rod 13 and a third gear 14. The second gear 12 is meshed with the first gear 11. The second gear 12 and the third gear 14 are coaxially fixedly connected to the two ends of the transmission rod 13 respectively. The third gear 14 is meshed with the fourth gear 15. When the first threaded rod 2 rotates, the first gear 11 is driven to rotate. The rotation of the first gear 11 will drive the second gear 12 to rotate. The rotation of the second gear 12 will drive the transmission rod 13 to rotate. The rotation of the transmission rod 13 will drive the third gear 14 to rotate. The rotation of the third gear 14 will drive the fourth gear 15 to rotate.

[0022] Please refer to Figures 9 to 11 , the surfaces of the two pistons 5 are provided with limiting embedding grooves 6, and a plurality of evenly distributed limiting embedding blocks 7 are rotatably connected in the caliper body 1. The plurality of limiting embedding blocks 7 are respectively used in conjunction with the limiting embedding grooves 6 provided on the two pistons 5. The limiting embedding grooves 6 are used for the limiting embedding blocks 7 to be rotatably embedded when parking. When the two parking blocks 30 are used to clamp the brake disc to park the car, the parking blocks 30 will have a tendency to rotate, and the force is transmitted to the piston 5, so that the piston 5 also has a tendency to rotate. Although the rotation of the piston 5 can be indirectly restricted by restricting the rotation of the threaded sleeve 3, during the parking process, when an external force acts on the piston 5 and the piston 5 has a tendency to rotate, the limiting embedding block 7 is rotatably embedded in the limiting embedding groove 6, so that the rotation of the piston 5 can be directly restricted, which is beneficial to strengthen the strength of restricting the rotation of the piston 5.

[0023] Furthermore, the opposite sides of the two pistons 5 are coaxially fixedly connected with parking blocks 30, and the caliper body 1 is provided with two limiting guide grooves for the linear movement of the two parking blocks 30 respectively, and the groove walls of the two limiting guide grooves are provided with avoidance grooves 10 for the rotation of the limiting inserts 7.

[0024] The upper and lower ends of each limiting insert 7 are fixedly connected with a rotating shaft 8, and the rotating shaft 8 is rotatably connected to the caliper body 1. A torsion spring 9 is fixedly connected between the limiting insert 7 and the caliper body 1. By setting the torsion spring 9, the limiting insert 7 is rotated by force, and when the force is lost, it will automatically reset and rotate under the elastic force of the torsion spring 9. In the technical solution of the present application, when parking, the piston 5 needs to move to push the parking block 30 to clamp the brake disc, so that the piston 5 moves into the limiting guide groove. The diameter of the limiting guide groove is larger than the diameter of the piston 5, and it cannot be with the piston 5 fits together, making the piston 5 lose the limit of the groove wall. At this time, the limit insert 7 automatically rotates and embeds into the limit insert groove 6 under the elastic force of the torsion spring 9 to prevent the piston 5 from rotating. When stopping parking, the parking block 30 is retracted. At this time, the parking block 30 will squeeze the limit insert 7, so that the limit insert 7 turns to the avoidance groove 10. When parking next time, the limit insert 7 will automatically reset and embed into the limit insert groove 6, which is conducive to achieving that the piston 5 can be limited when parking, and the parking block 30 will not be hindered when retracting, thereby achieving unexpected beneficial effects.

[0025] The caliper body 1 is provided with a plurality of filling components, which are respectively used to fill the gaps caused by the wear of the limit insert 7 and the limit square plate 17. During the long-term use of the fixed caliper, on the one hand, during the braking process, the force exerted on the parking block 30 will be transmitted to the limit strip 4 and the limit square plate 17, which may cause a small relative movement at the contact part with the caliper body 1. This relative movement will cause wear under long-term repeated action. On the other hand, external environmental factors may also accelerate the wear. After the limit strip 4 and the limit square plate 17 are worn, a gap will be generated between them and the caliper body 1, resulting in a decrease in the anti-rotation ability. By setting the filling components, the gaps caused by the wear can be filled in time, which is conducive to preventing the anti-rotation ability from decreasing.

[0026] The filling assembly includes a filling block 28 and a filling sheet 29. Each of the two sides of the limiting strip 4 has a filling block 28, and each of the filling blocks 28 and the limiting strip 4 has a filling sheet 29. When the limiting strip 4 or the limiting square plate 17 is worn, the filling block 28 is moved toward the limiting strip 4 to fill the gap formed by the wear. By setting the filling sheet 29, the filling sheet 29 is made of rubber material, and the filling sheet 29 can fit with the limiting strip 4. Since the filling sheet 29 is relatively soft, after the limiting strip 4 and the filling sheet 29 are pressed against each other, the filling sheet 29 will fit with the worn surface of the limiting strip 4.

[0027] A plurality of push blocks 19 are installed in the pliers body 1. Each push block 19 is used in conjunction with a filling block 28. The push block 19 is used to squeeze the filling block 28 to move and fill the gap. By moving the push block 19, the filling block 28 is squeezed and pushed to move, so that the filling block 28 and the filling sheet 29 always fit the surface of the limit strip 4.

[0028] Furthermore, the surface of each pushing block 19 in contact with the filling block 28 is set to be a first inclined surface 20. The pushing block 19 moves downward and squeezes the filling block 28 to move horizontally with the first inclined surface 20. The pushing block 19 can be driven to move downward by the electric push rod. Through such a setting, the moving direction of the pushing block 19 is not in the same direction as the rotation direction of the resistance limit bar 4. Compared with making the pushing block 19 and the rotation direction of the resistance limit bar 4 in the same direction to squeeze the filling block 28 to move, it is beneficial to reduce the rotational force transmitted from the limit bar 4 to the electric push rod.

[0029] A plurality of auxiliary blocks 23 are installed in the pliers body 1, and one side of each auxiliary block 23 is in contact with the surface of the filling block 28, and the other side of each auxiliary block 23 is set to a fourth inclined surface 26. The pliers body 1 has a first inclined wall that matches the fourth inclined surface 26. The top end of the auxiliary block 23 and the bottom end of the push block 19 are slidably connected. When the push block 19 moves downward, the auxiliary block 23 is also driven to move downward. When the auxiliary block 23 moves downward, due to the action of the fourth inclined surface 26 and the first inclined wall, the auxiliary block 23 also moves in the direction of the filling block 28, so that the auxiliary block 23 is in contact with the filling block 28, which helps to help the filling block 28 resist the rotation force.

[0030] The bottom surface of the push block 19 is set as a third inclined surface 25, and the top surface of the auxiliary block 23 is set as a second inclined surface 24 matched with the third inclined surface 25. By setting the second inclined surface 24 and the third inclined surface 25, when the push block 19 moves downward, the force acts on the second inclined surface 24, so that there is a horizontal component of force, which is convenient for guiding the auxiliary block 23 to move horizontally. The bottom end of each push block 19 is fixedly connected with a T-shaped inclined block 21, and the top end of each auxiliary block 23 is matched with a T-shaped inclined groove 22 for the T-shaped inclined block 21 to slide, so that the auxiliary block 23 and the push block 19 are slidably connected, which does not affect the movement of the auxiliary block 23 and connects the push block 19 with the auxiliary block 23.

[0031] The surface of the threaded sleeve 3 is provided with an auxiliary embedding groove 27 for the auxiliary block 23 to embed. The auxiliary embedding groove 27 is provided to prevent the auxiliary block 23 from being blocked by the threaded sleeve 3 when it moves downward, and one side surface of the auxiliary embedding groove 27 is provided as a second inclined wall that cooperates with the fourth inclined surface 26. When the auxiliary block 23 descends, it will be embedded in the auxiliary embedding groove 27. The auxiliary block 23 will resist the second inclined wall to resist the rotational force, thereby further preventing the threaded sleeve 3 from rotating.

[0032] The specific solution is as follows: the first threaded rod 2 is driven to rotate by starting the motor, the first threaded rod 2 rotates to drive the first gear 11 to rotate, the first gear 11 rotates to drive the second gear 12 to rotate, the second gear 12 rotates to drive the transmission rod 13 to rotate, the transmission rod 13 rotates to drive the third gear 14 to rotate, the third gear 14 rotates to drive the fourth gear 15 to rotate, at the same time, the first threaded rod 2 rotates to drive the threaded sleeve 3 to move in the direction of the brake disc, the fourth gear 15 rotates to drive the second threaded rod 16 to move in the direction of the brake disc, and at the same time, The limiting strip 4 and the limiting square plate 17 respectively resist the rotational force brought by the threaded sleeve 3 and the second threaded rod 16. At the same time, the movement of the second threaded rod 16 drives the limiting square plate 17 to move along the track of the second limiting slide groove 18. Then, the movement of the threaded sleeve 3 and the second threaded rod 16 respectively drives the piston 5 connected thereto to move in the direction of the brake disc. The piston 5 then drives the parking block 30 to move in the direction of the brake disc until the parking block 30 clamps the brake disc to achieve parking. At the same time, the limiting insert 7 rotates and is embedded in the limiting insert groove 6 under the elastic force of the torsion spring 9. When the limit strip 4 or the limit square plate 17 is worn, when parking, the electric push rod is started to drive the push block 19 to move downward. The downward movement of the push block 19 will push the filling block 28 to move to fill the gap caused by wear. The downward movement of the push block 19 will drive the auxiliary block 23 to move. Due to the action of the fourth inclined surface 26, the auxiliary block 23 moves obliquely downward, so that one side of the auxiliary block 23 is attached to the filling block 28.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A parking caliper piston anti-rotation assembly, comprising a caliper body (1), a first threaded rod (2) and a second threaded rod (16), characterized in that: The first threaded rod (2) and the second threaded rod (16) are both movably connected in the caliper body (1); the surface of the first threaded rod (2) is coaxially fixedly connected with a first gear (11); the surface of the second threaded rod (16) is coaxially threadedly connected with a fourth gear (15); a transmission assembly is connected between the first gear (11) and the fourth gear (15); a threaded sleeve (3) is coaxially threadedly sleeved at the right end of the first threaded rod (2); a piston (5) is coaxially fixedly connected to the surface of the threaded sleeve (3) opposite to the second threaded rod (16); a plurality of limiting strips (4) arranged in an annular array are coaxially fixedly connected to the surface of the threaded sleeve (3); the right end of the second threaded rod (16) is fixedly connected to a limiting square plate (17); a first limiting slide groove for linear movement of the limiting strip (4) is provided inside the caliper body (1); and a second limiting slide groove (18) for linear movement of the limiting square plate (17) is provided inside the caliper body (1).

2. The parking caliper piston anti-rotation assembly according to claim 1, characterized in that: The caliper body (1) is provided with a plurality of filling components, and the plurality of filling components are respectively used to fill the gaps caused by wear of the limiting insert (7) and the limiting square plate (17).

3. The parking caliper piston anti-rotation assembly according to claim 2, characterized in that: The filling component comprises a filling block (28) and a filling sheet (29), each of the two sides of the limiting strip (4) having a filling block (28), and each of the filling blocks (28) having a filling sheet (29) between it and the limiting strip (4).

4. The parking caliper piston anti-rotation assembly according to claim 3, characterized in that: A plurality of push blocks (19) are installed in the clamp body (1), each of the push blocks (19) being used in a one-to-one correspondence with a filling block (28), and the push blocks (19) are used to squeeze the filling block (28) to move and fill the gap.

5. The parking caliper piston anti-rotation assembly according to claim 4, characterized in that: The surface of each of the pushing blocks (19) in contact with the filling block (28) is arranged as a first inclined surface (20), and the pushing block (19) moves horizontally by moving downward and cooperating with the first inclined surface (20) to squeeze the filling block (28).

6. The parking caliper piston anti-rotation assembly according to claim 5, characterized in that: A plurality of auxiliary blocks (23) are installed in the pliers body (1), one side of each auxiliary block (23) is in contact with the surface of the filling block (28), the other side of each auxiliary block (23) is provided with a fourth inclined surface (26), the pliers body (1) has a first inclined wall matched with the fourth inclined surface (26), and the top end of the auxiliary block (23) is slidably connected to the bottom end of the push block (19).

7. The parking caliper piston anti-rotation assembly according to claim 6, characterized in that: The surface of the threaded sleeve (3) is provided with an auxiliary embedding groove (27) for the auxiliary block (23) to embed.

8. The parking caliper piston anti-rotation assembly according to claim 1, characterized in that: The surfaces of the two pistons (5) are provided with limit embedding grooves (6), and a plurality of evenly distributed limit embedding blocks (7) are rotatably connected in the caliper body (1). The plurality of limit embedding blocks (7) are respectively used in conjunction with the limit embedding grooves (6) provided on the two pistons (5), and the limit embedding grooves (6) are used for the limit embedding blocks (7) to be rotatably embedded when parking.

9. The parking caliper piston anti-rotation assembly according to claim 8, characterized in that: The upper and lower ends of each of the limit inserts (7) are fixedly connected to a rotating shaft (8), the rotating shaft (8) and the clamp body (1) are rotationally connected, and a torsion spring (9) is fixedly connected between the limit insert (7) and the clamp body (1).

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