Tooth type self-locking mechanism and brake with same

Abstract

The utility model provides a tooth type self-locking mechanism and a brake with the tooth type self-locking mechanism. The tooth type self-locking mechanism comprises an inner gear and an outer gear which are coaxially arranged, a first tooth surface is formed on the outer ring of the inner gear, the outer gear is annular, and a second tooth surface matched with the first tooth surface is arranged on the inner side wall of the annular outer gear; the first driving mechanism is arranged on one side of the inner gear and one side of the outer gear, and the outer gear is driven by the driving mechanism to be close to or away from the inner gear so that the outer gear can be embedded into or separated from the inner gear. According to the tooth type self-locking mechanism, the parking mechanism can still be stably and reliably locked when a motor in the parking mechanism is powered off, the structure is easy to implement, and disassembly and maintenance are convenient and fast.

Description

Technical Field

[0001] The utility model relates to the field of automobile brakes, in particular to a gear-type self-locking mechanism and a brake having the same. Background Art

[0002] Brakes are important components for cars to achieve braking functions. When the vehicle is parked, the driver only needs to press the parking brake button inside the car. The motor integrated in the rear brake receives the braking command and drives the axis of the parking mechanism to move, thereby pushing the friction plate to press the brake disc, generating braking torque on the rear wheel, and keeping the vehicle stationary.

[0003] However, if the parking function is maintained, the motor driving the parking mechanism needs to be powered on all the time to keep the parking mechanism working. If the motor is powered off unexpectedly, the parking function will fail. Utility Model Content

[0004] In view of this, the utility model provides a gear-type self-locking mechanism and a brake having the same, which can stably and reliably lock the parking mechanism when the motor in the parking mechanism is powered off.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] According to the first embodiment of the present invention, the toothed self-locking mechanism comprises:

[0007] An inner gear and an outer gear are coaxially arranged, wherein the outer ring of the inner gear is formed with a first tooth surface, and the outer gear is annular, and a second tooth surface matching the first tooth surface is provided on the inner side wall of the annular outer gear;

[0008] a first driving mechanism, the first driving mechanism being arranged on one side of the inner gear and the outer gear,

[0009] The first driving mechanism drives the external gear to approach or move away from the internal gear, so that the external gear engages with or disengages from the internal gear.

[0010] Furthermore, the first driving mechanism comprises:

[0011] Driving source;

[0012] A push rod assembly connected to a side of the driving source facing the inner gear and the outer gear;

[0013] A spring is sleeved on the periphery of the inner gear, and the inner diameter of the spring is greater than the inner diameter of the outer gear.

[0014] Furthermore, the push rod assembly comprises:

[0015] A connecting rod, one end of which is connected to the driving source;

[0016] A cross bar, the intersection of which is connected to the other end of the connecting rod.

[0017] Furthermore, four abutment blocks are symmetrically arranged on the outer side wall of the external gear, and the four abutment blocks are divided into two symmetrical pairs, and the connecting line between the two pairs of symmetrical abutment blocks forms a cross.

[0018] The end of the cross rod is provided with a protruding pushing block corresponding to the abutting block.

[0019] Furthermore, the driving source includes a solenoid valve or a hydraulic cylinder.

[0020] Furthermore, the first tooth surface is provided with a plurality of first helical teeth arranged at intervals, and the second tooth surface is provided with a plurality of second helical teeth arranged at intervals.

[0021] Wherein, the inclination direction of the first oblique tooth is opposite to that of the second oblique tooth.

[0022] Furthermore, the toothed self-locking mechanism further includes a housing,

[0023] A cavity is formed inside the housing, and the coaxially arranged internal gear and external gear and the first driving mechanism are arranged in the cavity.

[0024] An annular groove, a guide groove and a placement groove are sequentially arranged in the cavity along the axial direction. The spring is arranged in the annular groove. The outer wall of the external gear and the cross rod are slidably connected in the guide groove. The driving source is arranged in the placement groove.

[0025] The brake according to the second embodiment of the utility model comprises:

[0026] A clamp body, one end of which is provided with a clamping groove;

[0027] A brake assembly, the brake assembly being disposed in the clamping groove;

[0028] A second driving mechanism, the second driving mechanism is installed at the other end of the caliper body, and an output end of the second driving mechanism is connected to the brake assembly;

[0029] A driving motor, wherein an output shaft is provided inside the driving motor and extends out of two ends of the driving motor respectively, one end of the output shaft extending out of the driving motor is an output end, and the output end of the output shaft is connected to the input end of the second driving mechanism;

[0030] The gear self-locking mechanism of any embodiment of the first aspect above, wherein the internal gear of the gear self-locking mechanism is connected to the other end of the output shaft extending out of the drive motor, and the gear self-locking mechanism is used to control the second drive mechanism to drive the brake assembly to maintain the parking function when the drive motor stops working.

[0031] Furthermore, the brake assembly comprises:

[0032] A pair of friction plates, the pair of friction plates are relatively movably arranged in the clamping groove;

[0033] A brake disc is arranged between a pair of friction plates.

[0034] Furthermore, a receiving cavity is provided inside the other end of the caliper body, one end of the receiving cavity is connected to the clamping groove, and the other end of the receiving cavity is provided with an axial hole.

[0035] The second driving mechanism comprises:

[0036] A lead screw, the lead screw is arranged in the accommodating cavity along the setting direction of the accommodating cavity, and the input end of the lead screw extends out of the accommodating cavity through the shaft hole to be connected to the driving motor;

[0037] A driving block is arranged in the accommodating cavity and is screwed on the output end of the lead screw. The lead screw is driven to rotate by the driving motor so that the driving block is pressed against / away from the corresponding friction plate, thereby driving a pair of friction plates to clamp / release the brake disc.

[0038] The above technical solution of the utility model has at least one of the following beneficial effects:

[0039] According to the gear self-locking mechanism of the embodiment of the utility model, the first driving mechanism drives the outer gear close to the inner gear to be sleeved and engaged with it, or drives the outer gear away from the inner gear to achieve locking or unlocking of the inner gear. By conveniently locking the inner gear, the output shaft of the motor in the parking mechanism is locked, so that the parking mechanism can still be stably and reliably locked when the motor in the parking mechanism is powered off. The structure is easy to implement and convenient to disassemble and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic structural diagram of a toothed self-locking mechanism according to an embodiment of the first aspect of the utility model;

[0041] Figure 2 Another structural schematic diagram of the toothed self-locking mechanism of the first embodiment of the utility model;

[0042] Figure 3 It is a schematic diagram of the working state of the gear self-locking mechanism of the first aspect of the utility model in a non-parking state;

[0043] Figure 4 It is a schematic diagram of the working state of the gear-type self-locking mechanism in the parking state of the embodiment of the first aspect of the utility model;

[0044] Figure 5 A schematic diagram of the structure of a brake according to a second embodiment of the utility model;

[0045] Figure 6 This is a schematic diagram of the operation of the brake in the parking state according to the second embodiment of the utility model.

[0046] Reference numerals: 10. internal gear; 11. first helical gear;

[0047] 20. External gear; 21. Second helical gear; 22. Abutment block;

[0048] 30. First driving mechanism; 31. Driving source; 32. Push rod assembly; 321. Connecting rod; 322. Cross rod; 323. Pushing block; 33. Spring;

[0049] 40. Shell; 41. Annular groove; 42. Guide groove; 43. Placement groove;

[0050] 50. Driving motor; 51. Output shaft;

[0051] 60. Clamp body; 61. Clamping groove;

[0052] 70. Brake assembly; 71. Friction plate; 72. Brake disc;

[0053] 80. Second driving mechanism; 81. Lead screw; 82. Driving block; 83. Gear assembly. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0055] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0056] The toothed self-locking mechanism according to the embodiment of the utility model is first described in detail below with reference to the accompanying drawings.

[0057] According to the toothed self-locking mechanism of the first embodiment of the utility model, Figure 1 As shown, it may include: an inner gear 10 and an outer gear 20 which are coaxially arranged, and a first driving mechanism 30 .

[0058] The outer ring of the inner gear 10 is formed with a first tooth surface, the outer gear 20 is annular, and a second tooth surface matching the first tooth surface is provided on the inner side wall of the annular outer gear 20. The inner gear 10 is used to connect to the output shaft of the motor in the parking mechanism.

[0059] The first driving mechanism 30 is disposed on one side of the internal gear 10 and the external gear 20 .

[0060] The first driving mechanism 30 drives the external gear 20 to approach or move away from the internal gear 10 , so that the external gear 20 is engaged (ie meshed) with or disengaged from the internal gear 10 .

[0061] Specifically, the gear self-locking mechanism according to the embodiment of the utility model includes an inner gear 10 and an outer gear 20 arranged coaxially, and the outer gear 20 is driven by a first driving mechanism 30 to approach the inner gear 20 to sleeve the inner gear 20, or to move away from the inner gear 20. Among them, since the inner gear 10 is provided with a first tooth surface on its outer ring, and the annular outer gear 20 is provided with a second tooth surface matching the first tooth surface on its inner side wall, the locking of the inner gear 10 and the outer gear 20 is achieved by the cooperation of the first tooth surface and the second tooth surface, so that the inner gear 10 connected to the output shaft of the motor in the parking mechanism locks the output shaft, thereby realizing that the parking mechanism can still be stably and reliably locked when the motor in the parking mechanism is powered off, the structure is easy to implement, convenient to disassemble and maintain, and the production cost is low.

[0062] In some embodiments, Figure 1 , Figure 2 As shown, the first driving mechanism 30 may include: a driving source 31 , a push rod assembly 32 and a spring 33 .

[0063] The push rod assembly 32 is connected to the side of the driving source 31 facing the inner gear 10 and the outer gear 20 .

[0064] The spring 33 is sleeved on the outer periphery of the inner gear 10 , and the inner diameter of the spring 33 is greater than the inner diameter of the outer gear 20 .

[0065] As a specific example, in the non-braking state, refer to Figure 3 As shown, the push rod assembly 32 connected to the driving source 31 abuts against the side wall of the outer gear 20, and the outer gear 20 is separated from the inner gear 10 and the spring 33 sleeved on the outer periphery of the inner gear 10; when in the braking state, refer to Figure 4 As shown, the driving source 31 drives the push rod assembly 32 to push the outer gear 20 toward the inner gear 10 . During the approaching process, the outer gear 20 gradually squeezes the spring 33 until it is locked with the inner gear 10 in the same plane position.

[0066] Thus, the locking or separation of the inner gear 10 and the outer gear 20 can be driven conveniently and reliably with a low failure rate.

[0067] In some embodiments, Figure 1 As shown, the push rod assembly 32 may include: a connecting rod 321 and a cross rod 322 .

[0068] One end of the connecting rod 321 is connected to the driving source 31 .

[0069] The intersection of the cross rod 322 is connected to the other end of the connecting rod 321 .

[0070] That is, the push rod assembly 32 includes a cross rod 322 and a connecting rod 321 connecting the intersection of the cross rod 322 , and the cross rod 322 is used to push the outer gear 20 to move, and the force is stable and reliable.

[0071] In some embodiments, Figure 1 As shown, four abutment blocks 21 are symmetrically arranged on the outer side wall of the external gear 20 . The four abutment blocks 21 are divided into two symmetrical pairs, and the connecting line between the two pairs of symmetrical abutment blocks 21 forms a cross.

[0072] A protruding pushing block 323 is provided at the end of the cross rod 322 corresponding to the abutting block 21 .

[0073] Therefore, an abutment block 21 is provided on the outer side wall of the external gear 20 in a relatively cross-shaped position, and a push block 323 is correspondingly provided at the end of the cross rod 322. The push block 323 is connected to the abutment block 21 to further ensure the stability of the cross rod 322 in pushing the external gear 20.

[0074] In some embodiments, the driving source 31 includes a solenoid valve or a hydraulic cylinder.

[0075] In other words, the solenoid valve or hydraulic cylinder is selected as the driving source according to the specific demand standards to improve the applicability of the self-locking mechanism.

[0076] In some embodiments, Figure 1 As shown, a plurality of first helical teeth 11 are arranged at intervals on the first tooth surface, and a plurality of second helical teeth 12 are arranged at intervals on the second tooth surface.

[0077] The first oblique teeth 11 and the second oblique teeth 12 have inclination directions opposite to each other.

[0078] That is, the first helical teeth 11 on the first tooth surface are arranged opposite to the second helical teeth 12 on the second tooth surface, so that the locking of the internal gear 10 and the external gear 20 when they are engaged with each other is more stable and reliable.

[0079] In some embodiments, Figure 1 As shown, the toothed self-locking mechanism may further include a housing 40 .

[0080] A cavity is formed inside the housing 40 , and the coaxially arranged internal gear 10 , external gear 20 , and first driving mechanism 30 are disposed in the cavity.

[0081] An annular groove 41 , a guide groove 42 and a placement groove 43 are sequentially arranged in the cavity along the axial direction. A spring 33 is arranged in the annular groove 41 . The outer wall of the external gear 20 is slidably connected to the cross rod 322 in the guide groove 42 . The driving source 31 is arranged in the placement groove 43 .

[0082] Therefore, on the one hand, the various components of the gear self-locking mechanism are protected, and on the other hand, the reliability during driving is improved and the failure rate is reduced by limiting the placement of each component.

[0083] The brake according to the second embodiment of the utility model is described in detail below with reference to the accompanying drawings. Figure 1 , Figure 5 , Figure 6 As shown, it may include: a caliper body 60, a brake assembly 70, a second driving mechanism 80, a driving motor 50 and a gear-type self-locking mechanism.

[0084] One end of the clamp body 60 is provided with a clamping groove 61 .

[0085] The brake assembly 70 is disposed in the clamping groove 61 .

[0086] The second driving mechanism 80 is installed at the other end of the caliper body 60 , and an output end of the second driving mechanism 80 is connected to the brake assembly 70 .

[0087] An output shaft 51 is provided inside the driving motor 50 and extends out from both ends of the driving motor 50 . One end of the output shaft 51 extending out of the driving motor 50 is the output end. The output end of the output shaft 51 is connected to the input end of the second driving mechanism 80 .

[0088] The internal gear 10 of the gear self-locking mechanism is connected to the other end of the output shaft 51 extending out of the drive motor 50. The gear self-locking mechanism is used to control the second drive mechanism 80 to drive the brake assembly 70 to maintain the parking function when the drive motor 50 stops working.

[0089] Specifically, a clamping groove 61 is opened at one end of the caliper body 60, and a brake assembly 70 is arranged in the clamping groove 61. A second driving mechanism 80 is arranged inside the other end of the caliper body 60. The output end of the second driving mechanism 80 is connected to the brake assembly 70, and the input end of the second driving mechanism 80 is simultaneously connected to the output end of the output shaft 51 of the driving motor 50. The driving motor 50 drives the brake assembly 70 through the second driving mechanism 80 to realize the parking function, and the gear self-locking mechanism is used to maintain the parking function. When the driving motor 50 is disabled, the output shaft 51 of the driving motor 50 can be locked to drive the second driving mechanism 80 to maintain the parking function.

[0090] In some embodiments, Figure 5 As shown, the brake assembly 70 may include: a pair of friction plates 71 and a brake disc 72 .

[0091] A pair of friction plates 71 are relatively movably disposed in the clamping groove 61 .

[0092] The brake disc 72 is disposed between the pair of friction plates 71 .

[0093] In some embodiments, Figure 5 , Figure 6 As shown, a receiving cavity (not shown) is provided inside the other end of the caliper body 60 , one end of the receiving cavity is connected to the clamping groove, and the other end of the receiving cavity is provided with an axial hole.

[0094] The second driving mechanism 80 may include a lead screw 81 and a driving block 82 .

[0095] The lead screw 81 is arranged in the accommodating cavity along the setting direction of the accommodating cavity, and the input end of the lead screw 81 extends out of the accommodating cavity through the shaft hole to connect the drive motor 50. Specifically, the input end of the lead screw 81 is connected to the output end of the output shaft 51 of the drive motor 50 through the gear assembly 83.

[0096] The driving block 82 is disposed in the accommodating cavity and is screwed onto the output end of the lead screw 81 . The lead screw 81 is driven by the driving motor 50 to rotate so that the driving block 82 is pressed against / away from the corresponding friction plate 71 , thereby driving a pair of friction plates 71 to clamp / release the brake disc 72 .

[0097] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A toothed self-locking mechanism, characterized in that: include: An inner gear and an outer gear are coaxially arranged, wherein the outer ring of the inner gear is formed with a first tooth surface, and the outer gear is annular, and a second tooth surface matching the first tooth surface is provided on the inner side wall of the annular outer gear; a first driving mechanism, the first driving mechanism being arranged on one side of the inner gear and the outer gear, The first driving mechanism drives the external gear to approach or move away from the internal gear, so that the external gear engages with or disengages from the internal gear.

2. The toothed self-locking mechanism according to claim 1, characterized in that: The first driving mechanism comprises: Driving source; A push rod assembly connected to a side of the driving source facing the inner gear and the outer gear; A spring is sleeved on the periphery of the inner gear, and the inner diameter of the spring is greater than the inner diameter of the outer gear.

3. The toothed self-locking mechanism according to claim 2, characterized in that: The push rod assembly comprises: A connecting rod, one end of which is connected to the driving source; A cross bar, the intersection of which is connected to the other end of the connecting rod.

4. The toothed self-locking mechanism according to claim 3, characterized in that: Four abutment blocks are arranged on the outer side wall of the external gear, and the four abutment blocks are divided into two symmetrical pairs, and the connecting line between the two pairs of symmetrical abutment blocks forms a cross. The end of the cross rod is provided with a protruding pushing block corresponding to the abutting block.

5. The toothed self-locking mechanism according to claim 2, characterized in that: The driving source includes a solenoid valve or a hydraulic cylinder.

6. The toothed self-locking mechanism according to claim 1, characterized in that: The first tooth surface is provided with a plurality of first helical teeth arranged at intervals, and the second tooth surface is provided with a plurality of second helical teeth arranged at intervals. Wherein, the inclination direction of the first oblique teeth is opposite to that of the second oblique teeth.

7. The toothed self-locking mechanism according to claim 4, characterized in that: Also includes a housing, A cavity is formed inside the housing, and the coaxially arranged internal gear and external gear and the first driving mechanism are arranged in the cavity. An annular groove, a guide groove and a placement groove are sequentially arranged in the cavity along the axial direction. The spring is arranged in the annular groove. The outer wall of the external gear and the cross rod are slidably connected in the guide groove. The driving source is arranged in the placement groove.

8. A brake, characterized in that: include: A clamp body, one end of which is provided with a clamping groove; A brake assembly, the brake assembly being disposed in the clamping groove; A second driving mechanism, the second driving mechanism is installed at the other end of the caliper body, and an output end of the second driving mechanism is connected to the brake assembly; A driving motor, wherein an output shaft is provided inside the driving motor and extends out of two ends of the driving motor respectively, one end of the output shaft extending out of the driving motor is an output end, and the output end of the output shaft is connected to an input end of the second driving mechanism; The gear self-locking mechanism described in any one of claims 1 to 7, wherein the internal gear of the gear self-locking mechanism is connected to the other end of the output shaft extending out of the drive motor, and the gear self-locking mechanism is used to control the second drive mechanism to drive the brake assembly to maintain the parking function when the drive motor stops working.

9. The brake according to claim 8, characterized in that The brake assembly comprises: A pair of friction plates, the pair of friction plates are relatively movably arranged in the clamping groove; A brake disc is arranged between a pair of friction plates.

10. The brake according to claim 9, characterized in that The other end of the caliper body is provided with a receiving cavity, one end of the receiving cavity is connected to the clamping groove, and the other end of the receiving cavity is provided with an axial hole. The second driving mechanism comprises: A lead screw, the lead screw is arranged in the accommodating cavity along the setting direction of the accommodating cavity, and the input end of the lead screw extends out of the accommodating cavity through the shaft hole to be connected to the driving motor; A driving block is arranged in the accommodating cavity and is screwed on the output end of the lead screw. The driving motor drives the lead screw to rotate so that the driving block is pressed against / away from the corresponding friction plate, thereby driving a pair of friction plates to clamp / release the brake disc.

Images