Automatic compensation brake mechanism and parking brake system

Abstract

A parking brake system comprises an automatic compensation brake mechanism and a disc. The automatic compensation brake mechanism comprises a first brake pad, a piston, a movable nut and a bolt. An inclined side wall is formed on the inner side of the piston. The movable nut is movably arranged in the piston. A bolt is coupled to the aperture of the movable nut and extends into the piston. When a first gap is formed between the first brake pad and the disc, the piston moves in the action direction to push the first brake pad to make contact with the disc. After the piston moves to enable a second gap to be formed between the inclined side wall of the piston and the annular part of the movable nut, the movable nut moves in the action direction corresponding to the bolt. The annular part of the movable nut is attached to the inclined side wall of the piston.

Description

Technical Field

[0001] The utility model relates to an automatic compensation brake mechanism and a parking brake system. Background Art

[0002] Generally speaking, the brake pads of the parking brake system will contact the disc, and friction will occur between the brake pads and the disc to reduce the speed of the tire and achieve the deceleration effect. However, as the number of uses increases, the friction between the disc surface and the brake pads will produce dents. The disc with dents will make the contact between the brake pads and the disc incomplete, and the braking stress of the brake pads will not be evenly applied to the disc, resulting in insufficient braking force of the parking brake system, thereby reducing the overall performance of the parking brake system. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the utility model provides an automatic compensating brake mechanism and a parking brake system.

[0004] According to a technical aspect of the utility model, the technical solution is to provide an automatic compensating brake mechanism. According to one embodiment of the utility model, an automatic compensating brake mechanism includes a brake chamber, a piston, a movable nut and a bolt. The brake chamber has a first brake pad. The piston fits the first brake pad of the brake chamber. An inclined side wall is formed on the inner side of the piston. The movable nut is movably arranged in the piston. The movable nut has a through hole and an annular portion surrounding the through hole. The bolt is coupled to the through hole of the movable nut and extends into the piston. When there is a first gap between the first brake pad and the disc, the piston moves along the action direction to push the first brake pad to contact the disc. After the piston moves so that there is a second gap between the inclined side wall of the piston and the annular portion of the movable nut, the movable nut moves along the action direction corresponding to the bolt so that the annular portion of the movable nut fits the inclined side wall of the piston.

[0005] In one embodiment of the present invention, the movable nut has a first thread, and the bolt has a second thread, and the second thread corresponds to the first thread, so that the movable nut and the bolt are coupled to each other.

[0006] In one embodiment of the present invention, the movable nut has an extending portion connected to the annular portion, and the extending portion extends to the outside of the piston.

[0007] In one embodiment of the present invention, the annular portion of the movable nut gradually shrinks toward the first brake pad.

[0008] In one embodiment of the present invention, the annular portion of the movable nut is closer to the first brake pad than the extending portion of the movable nut.

[0009] In one embodiment of the present invention, the automatic compensation brake mechanism further comprises a ball, which is located in the head end of the bolt.

[0010] In one embodiment of the present invention, the ball is fixed in the head end of the bolt.

[0011] In one embodiment of the present invention, the center of the ball is aligned with the center of the bolt.

[0012] In one embodiment of the present invention, the automatic compensation brake mechanism further comprises a brake member which abuts against the ball and is configured to push the ball to move along the action direction.

[0013] In one embodiment of the present invention, the tail end of the bolt is closer to the first brake pad than the annular portion of the movable nut.

[0014] In one embodiment of the present invention, the tail end of the bolt is aligned with the center of the piston.

[0015] According to another technical aspect of the utility model, a technical solution is to provide a parking brake system.

[0016] According to an embodiment of the present invention, a parking brake system comprises the above-mentioned automatic compensation brake mechanism and a second brake pad. The second brake pad is located on a side of the first brake pad away from the piston.

[0017] In one embodiment of the present invention, the parking brake system further comprises a disc, which is located between the first brake pad and the second brake pad.

[0018] In one embodiment of the present invention, the second brake pad contacts the disc during braking.

[0019] In one embodiment of the present invention, the disc is located in the brake chamber.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] In the above-mentioned embodiment of the utility model, the first brake pad and the disc of the parking brake system will automatically compensate for the gap between the two. That is to say, when there is a first gap between the first brake pad and the disc, the piston will move along the action direction to push the first brake pad to contact the disc. In addition, after the piston moves so that there is a second gap between the inclined side wall of the piston and the annular portion of the movable nut, the movable nut can move along the action direction corresponding to the bolt so that the annular portion of the movable nut can fit the inclined side wall of the piston. In other words, the piston, the movable nut and the bolt can move along the action direction to compensate for the gap caused by the long-term friction between the first brake pad and the disc. The automatic compensation design of the piston, the movable nut and the bolt can increase the braking force of the parking brake system, thereby improving the overall performance of the parking brake system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of an automatic compensating brake mechanism according to one embodiment of the utility model.

[0023] Figure 2 It is a stereoscopic diagram of a piston, a movable nut, a bolt and a ball according to an embodiment of the utility model.

[0024] Figures 3 to 5 It is a cross-sectional view of a parking brake system in different states during operation according to an embodiment of the present invention.

[0025] Description of the figure number:

[0026] 100: Automatic compensation brake mechanism

[0027] 110: Brake chamber

[0028] 112: First brake pad

[0029] 114: Second brake pad

[0030] 120: Piston

[0031] 122: Sloped sidewalls

[0032] 130: movable nut

[0033] 132: Perforation

[0034] 134: Ring

[0035] 136: First thread

[0036] 138: Extension

[0037] 140: Bolt

[0038] 142: Second thread

[0039] 144: Tail end

[0040] 146: Headend

[0041] 150: Ball

[0042] 160: Brake parts

[0043] 200: Disc

[0044] 300: Parking brake system

[0045] D: Direction of movement

[0046] F: First gap

[0047] G: Second gap

[0048] L1: first length

[0049] L2: Second length. DETAILED DESCRIPTION

[0050] Figure 1 It is a three-dimensional diagram of an automatic compensating brake mechanism 100 according to an embodiment of the present invention. Figure 2 1 is a three-dimensional diagram of a piston 120, a movable nut 130, a bolt 140 and a ball 150 according to an embodiment of the present invention. Referring to FIG. 1 and FIG. 2 simultaneously, the automatic compensating brake mechanism 100 includes a piston 120, a movable nut 130, a bolt 140 and a ball 150. The piston 120 may be cylindrical and have an inner groove. The movable nut 130 may be aligned with the piston 120. The movable nut 130 has a through hole 132 and an annular portion 134 surrounding the through hole 132. The movable nut 130 has an extension portion 138 connected to the annular portion 134, and the extension portion 138 extends outside the piston 120. The annular portion 134 of the movable nut 130 tapers toward the piston 120. The bolt 140 may be aligned with the movable nut 130. The bolt 140 may be coupled to the through hole 132 of the movable nut 130. The bolt 140 has a second thread 142. The bolt 140 has a tail end 144 and a head end 146 opposite to the tail end 144. The ball 150 may be aligned with the bolt 140. The ball 150 is located in the head end 146 of the bolt 140. The ball 150 may press the bolt 140. The ball 150 is fixed in the head end 146 of the bolt 140. The center of the ball 150 is aligned with the center of the bolt 140.

[0051] Figures 3 to 53 and 4, the automatic compensation brake mechanism 100 includes a brake chamber 110, a piston 120, a movable nut 130 and a bolt 140. The brake chamber 110 has a first brake pad 112 and a second brake pad 114 relative to the first brake pad 112. The first brake pad 112 and the second brake pad 114 of the brake chamber 110 are used to clamp the disc 200. The first brake pad 112 and the second brake pad 114 can rub the disc 200 to reduce the speed of the tire and achieve a deceleration effect. The piston 120 is attached to the first brake pad 112 of the brake chamber 110. An inclined side wall 122 is formed on the inner side of the piston 120. The movable nut 130 is movably disposed in the piston 120. The movable nut 130 has a through hole 132 and an annular portion 134 surrounding the through hole 132. The inclined side wall 122 of the piston 120 has the effect of abutting against the annular portion 134 of the movable nut 130. The bolt 140 is coupled to the through hole 132 of the movable nut 130 and extends into the piston 120. When there is a first gap F between the first brake pad 112 and the disc 200, the piston 120 can move along the action direction D to push the first brake pad 112 to contact the disc 200. The tail end 144 of the bolt 140 is closer to the first brake pad 112 than the annular portion 134 of the movable nut 130. The tail end 144 of the bolt 140 is aligned with the center of the piston 120.

[0052] Specifically, the first brake pad 112 of the automatic compensation brake mechanism 100 and the disc 200 will automatically compensate for the gap (e.g., the first gap F) therebetween. That is, when there is the first gap F between the first brake pad 112 and the disc 200, the piston 120 will move along the action direction D to push the first brake pad 112 to contact the disc 200. Therefore, even if the disc 200 has a dent due to long-term use of the automatic compensation brake mechanism 100, the piston 120 can still move along the action direction D to make the first brake pad 112 contact the disc 200, which can improve the situation where the brake stress cannot be evenly applied to the disc 200.

[0053] In some embodiments, the movable nut 130 has a first thread 136, and the bolt 140 has a second thread 142. The second thread 142 of the bolt 140 corresponds to the first thread 136 of the movable nut 130, so that the movable nut 130 and the bolt 140 are coupled to each other. That is, the movable nut 130 can move relative to the bolt 140 along the action direction D. The bolt 140 can also move relative to the movable nut 130 along the action direction D. In addition, the movable nut 130 has an extension portion 138 connected to the annular portion 134. The extension portion 138 of the movable nut 130 extends outside the piston 120. The extension portion 138 of the movable nut 130 extends in a direction away from the piston 120. The annular portion 134 of the movable nut 130 is gradually reduced toward the first brake pad 112. The gradually reduced annular portion 134 makes the inclined side wall 122 of the piston 120 have the effect of abutting the annular portion 134 of the movable nut 130. In other words, the annular portion 134 of the movable nut 130 is tapered relative to the inclined sidewall 122 on the inner side of the piston 120. In some embodiments, the annular portion 134 of the movable nut 130 is closer to the first brake pad 112 than the extension portion 138 of the movable nut 130. In addition, the first length L1 of the bolt 140 is greater than the second length L2 of the movable nut 130. The bolt 140 having the first length L1 greater than the second length L2 allows the movable nut 130 to move relative to the bolt 140 along the action direction D.

[0054] Please refer to FIG. 4 and FIG. 5 . After the piston 120 moves so that the second gap G exists between the inclined side wall 122 of the piston 120 and the annular portion 134 of the movable nut 130, the movable nut 130 can move along the action direction D corresponding to the bolt 140, so that the annular portion 134 of the movable nut 130 can fit the inclined side wall 122 of the piston 120 again. In other words, even if the piston 120 moves toward the first brake pad 112 so that the second gap G exists between the inclined side wall 122 of the piston 120 and the annular portion 134 of the movable nut 130, the design of the movable nut 130 itself will still automatically move along the action direction D corresponding to the bolt 140. When the annular portion 134 of the movable nut 130 fits the inclined side wall 122 of the piston 120 again, the annular portion 134 of the movable nut 130 will stop moving, as shown in FIG. 5 .

[0055] In some embodiments, the piston 120, the movable nut 130, and the bolt 140 can move along the action direction D to compensate for the dents caused by the long-term friction between the first brake pad 112 and the disc 200. The disc 200 is located in the brake chamber 110. The second brake pad 114 contacts the disc 200 during braking. The automatic compensation design of the piston 120, the movable nut 130, and the bolt 140 can increase the braking force of the parking brake system 300, thereby improving the overall performance of the parking brake system 300. The parking brake system 300 includes the above-mentioned automatic compensation brake mechanism 100 and the second brake pad 114. The second brake pad 114 of the brake chamber 110 is located on the side of the first brake pad 112 away from the piston 120. For example, the second brake pad 114 of the brake chamber 110 is located on the left side of the first brake pad 112. The automatic compensation brake mechanism 100 also includes a ball 150 and a brake member 160. The ball 150 of the automatic compensating brake mechanism 100 is located in the head end 146 of the bolt 140. The brake member 160 of the automatic compensating brake mechanism 100 abuts against the ball 150 and is configured to push the ball 150 to move along the action direction D.

[0056] In summary, the first brake pad 112 and the disc 200 of the parking brake system 300 automatically compensate for the gap (e.g., the first gap F) therebetween. That is, when the first brake pad 112 and the disc 200 have the first gap F, the piston 120 moves along the action direction D to push the first brake pad 112 to contact the disc 200, so that the first gap F disappears. In addition, after the piston 120 moves so that the second gap G exists between the inclined side wall 122 of the piston 120 and the annular portion 134 of the movable nut 130, the movable nut 130 can move along the action direction D corresponding to the bolt 140, so that the annular portion 134 of the movable nut 130 can be again attached to the inclined side wall 122 of the piston 120, so that the second gap G disappears. In other words, the piston 120, the movable nut 130, and the bolt 140 can move along the action direction D to compensate for the dents caused by the long-term friction between the first brake pad 112 and the disc 200. The automatic compensation design of the piston 120 , the movable nut 130 , and the bolt 140 can improve the braking force of the parking brake system 300 , and improve the situation where the performance of the parking brake system 300 is reduced due to the generation of dents.

Claims

1. An automatic compensating brake mechanism, characterized in that: Include: A brake chamber (110) having a first brake pad (112); A piston (120) is attached to the first brake pad (112) of the brake chamber (110) and has an inclined side wall (122) formed on its inner side; a movable nut (130) movably disposed in the piston (120) and having a through hole (132) and an annular portion (134) surrounding the through hole (132); and A bolt (140) is coupled to the through hole (132) of the movable nut (130) and extends into the piston (120), wherein when a first gap (F) is provided between the first brake pad (112) and a disc (200), the piston (120) moves along an action direction (D) to push the first brake pad (112) to contact the disc (200), and after the piston (120) moves so that a second gap (G) is provided between the inclined side wall (122) of the piston (120) and the annular portion (134) of the movable nut (130), the movable nut (130) moves along the action direction (D) corresponding to the bolt (140) so that the annular portion (134) of the movable nut (130) fits against the inclined side wall (122) of the piston (120).

2. The automatic compensating brake mechanism according to claim 1, characterized in that: The movable nut (130) has a first thread (136), and the bolt (140) has a second thread (142), and the second thread (142) corresponds to the first thread (136), so that the movable nut (130) and the bolt (140) are coupled to each other.

3. The automatic compensating brake mechanism according to claim 1, characterized in that: The movable nut (130) has an extension portion (138) connected to the annular portion (134), and the extension portion (138) extends outside the piston (120).

4. The automatic compensating brake mechanism according to claim 3, characterized in that: The annular portion (134) of the movable nut (130) gradually shrinks toward the first brake pad (112).

5. The automatic compensating brake mechanism according to claim 3, characterized in that: The annular portion (134) of the movable nut (130) is closer to the first brake pad (112) than the extending portion (138) of the movable nut (130).

6. The automatic compensating brake mechanism according to claim 1, characterized in that: Also includes: A ball (150) is located in a head end (146) of the bolt (140).

7. The automatic compensating brake mechanism according to claim 6, characterized in that: The ball (150) is fixed in the head end (146).

8. The automatic compensating brake mechanism according to claim 6, characterized in that: The center of the ball (150) is aligned with the center of the bolt (140).

9. The automatic compensating brake mechanism according to claim 6, characterized in that: Also includes: A brake member (160) abuts against the ball (150) and is configured to push the ball (150) to move along the movement direction (D).

10. The automatic compensating brake mechanism according to claim 1, characterized in that: A rear end (144) of the bolt (140) is closer to the first brake pad (112) than the annular portion (134) of the movable nut (130).

11. The automatic compensating brake mechanism according to claim 10, characterized in that: The tail end (144) of the bolt (140) is aligned with the center of the piston (120).

12. A parking brake system, characterized in that: Include: The automatic compensating brake mechanism according to any one of claims 1 to 11; and A second brake pad (114) is located on a side of the first brake pad (112) of the automatic compensating brake mechanism (100) away from the piston (120).

13. The parking brake system according to claim 12, characterized in that: Also includes: The disc (200) is located between the first brake pad (112) and the second brake pad (114).

14. The parking brake system according to claim 13, characterized in that: The second brake pad (114) contacts the disc (200) during braking.

15. The parking brake system according to claim 13, characterized in that: The disc (200) is located in the brake chamber (110).

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