Rotation locking device and brake

Abstract

The utility model relates to the technical field of lead screws, and particularly discloses a rotary locking device and a brake. The device is used for stopping a to-be-locked piece from rotating and comprises a clamp body and an anti-rotating pin assembly. A positioning hole penetrates through the clamp body, and a piece to be locked is installed on the clamp body. The anti-rotating pin assembly is arranged in the positioning hole in a penetrating mode and comprises an anti-rotating pin cover and an anti-rotating pin, the anti-rotating pin can rotate around the axis of the anti-rotating pin relative to the anti-rotating pin cover, the anti-rotating pin extends out of one end of the positioning hole, the anti-rotating pin cover is detachably installed at the other end of the positioning hole, and rotation of the to-be-locked piece relative to the clamp body is stopped when the to-be-locked piece makes contact with the anti-rotating pin. According to the device, the anti-rotation pin assembly is positioned through the through positioning hole in the clamp body, the purpose of stopping rotation of the to-be-locked piece is achieved in combination with the optimized design of the structure of the anti-rotation pin assembly, the occupied space is reduced, and the reliability of rotation locking is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lead screws, in particular to a rotation locking device and a brake. Background Art

[0002] The brake used in an automobile realizes braking through the frictional force of friction plates. The friction plates include an inner friction plate and an outer friction plate. Among them, the outer friction plate is installed on the clamp body, and the inner friction plate is installed on the clamp body. A piston and a ball screw assembly are arranged in the clamp body. Driven by a motor, the lead screw rotates, and the nut moves linearly, thereby driving the piston to eject from the clamp body and pushing the inner friction plate and the outer friction plate to move close to the brake disc in a linkage manner to realize braking.

[0003] The ball screw is a key component for realizing the conversion of rotation into linear motion. The rotational force generated by the motor causes the lead screw to rotate. During the loading or unloading process, it is necessary to restrict the rotation of the nut so that the nut can only move linearly, and an axial force is generated on the nut. In the existing design, one of the lead screw and the nut always rotates, and the other moves linearly. The part moving linearly needs to restrict the degree of freedom of the rotating part. The rotation locking device is a key structure for realizing this function. In actual use, this device has various forms.

[0004] In the prior art, the rotation locking device is hidden inside the clamp body and fixed together with the nut. The installation space for the anti-rotation pin is relatively small, and it is not easy to be reliably fixed with the nut. In addition to the lead screw and the clamp body, the anti-rotation pin slides in an intermediate part, and the structure is relatively complex, and the radial dimension space is large. Moreover, the installation space left for the anti-rotation pin is small, which causes the length of the anti-rotation pin to be greatly limited, and the strength and reliability are relatively poor. At the same time, in some of the prior art solutions, it is necessary to machine a special-shaped guide groove on the inner wall of the piston cylinder of the clamp body for the anti-rotation pin to slide. The guide groove is a special-shaped structure machined in the hole, and the processing technology is complex and the processing difficulty is high.

[0005] In summary, in the technical solutions of the existing rotation locking devices, most of the rotation locking devices are installed on the nut of the ball screw assembly, and the installation space on the nut is relatively small, and the reliability of rotation locking is poor. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a rotation locking device and a brake to optimize the specific structure of the anti-rotation pin assembly, reduce the occupied space, and improve the reliability of rotation locking.

[0007] To achieve the above object, the utility model adopts the following technical solutions:

[0008] A rotation locking device for preventing rotation of a piece to be locked. The rotation locking device includes a clamp body and an anti-rotation pin assembly. The clamp body is penetrated with a positioning hole, and the piece to be locked is installed on the clamp body. The anti-rotation pin assembly is inserted through the positioning hole. The anti-rotation pin assembly includes an anti-rotation pin cover and an anti-rotation pin. The anti-rotation pin can rotate relative to the anti-rotation pin cover around the axis of the anti-rotation pin. One end of the anti-rotation pin extends out of the positioning hole, and the anti-rotation pin cover is detachably installed at the other end of the positioning hole. The rotation of the piece to be locked relative to the clamp body is stopped when the piece to be locked contacts the anti-rotation pin.

[0009] As an alternative technical solution of the rotation locking device, one end of the anti-rotation pin is a pin root part, and the other end is a pin contact part. The pin contact part passes through the positioning hole, and the pin contact part is in anti-rotation cooperation with the positioning hole. The pin contact part is used to contact the piece to be locked, and the piece to be locked can move relative to the pin contact part. One end of the anti-rotation pin cover is recessed with a blind hole, and a plurality of anti-rotation pin cover riveting edges are circumferentially and evenly distributed on the edge of the blind hole. The pin root part is rotationally matched with the blind hole, and both ends of the pin root part are respectively attached to the bottom of the blind hole and the anti-rotation pin cover riveting edge.

[0010] As an alternative technical solution of the rotation locking device, the anti-rotation pin cover riveting edge is an L-shaped plate. The horizontal plate of the anti-rotation pin cover riveting edge is fixedly connected to the anti-rotation pin cover, and the vertical plate of the anti-rotation pin cover riveting edge is used to contact the pin root part.

[0011] As an alternative technical solution of the rotation locking device, the positioning hole includes a coaxial accommodating hole and an avoidance hole. The aperture of the accommodating hole is larger than that of the avoidance hole. One end of the anti-rotation pin is a pin root part, and the other end is a pin contact part. The pin contact part is used to contact the piece to be locked. The anti-rotation pin cover and the accommodating hole enclose an accommodating cavity, and the pin root part is rotatably installed in the accommodating cavity. The anti-rotation pin passes through the avoidance hole.

[0012] As an alternative technical solution of the rotation locking device, the pin root part is a columnar part, and the axis of the pin root part coincides with the axis of the anti-rotation pin. The pin root part rotates relative to the anti-rotation pin cover around the axis of the pin root part.

[0013] As an alternative technical solution of the rotation locking device, the anti-rotation pin assembly further includes a sealing ring. The sealing ring is sleeved on the side surface of the anti-rotation pin cover, and the sealing ring is clamped between the anti-rotation pin cover and the hole wall of the positioning hole.

[0014] As an alternative technical solution of the rotation locking device, a sealing groove of the anti-rotation pin cover is annularly arranged on the side surface of the anti-rotation pin cover, and the sealing ring is fitted and installed in the sealing groove.

[0015] As an alternative technical solution of the rotation locking device, the side surface of the anti-rotation pin cover is provided with an anti-rotation pin cover thread, and the anti-rotation pin cover thread is in close fit with the hole wall of the positioning hole.

[0016] A brake, comprising a brake main body and the above-mentioned rotation locking device. The brake main body includes a nut body, the piece to be locked is the nut body, a chute for the anti-rotation pin is concavely provided on the surface of the nut body, a part of the anti-rotation pin is placed in the chute for the anti-rotation pin, and the nut body can move relative to the anti-rotation pin.

[0017] As an alternative technical solution of the brake, two opposite main stress surfaces of the anti-rotation pin are provided on the side wall of the anti-rotation pin; when the nut body is in contact with the anti-rotation pin, the main stress surfaces of the anti-rotation pin are in fit with the wall of the chute for the anti-rotation pin, so that the nut body and the anti-rotation pin are in anti-rotation fit.

[0018] As an alternative technical solution of the brake, the main stress surface of the anti-rotation pin is in anti-rotation fit with the hole wall of the positioning hole; a guiding fillet of the anti-rotation pin is arranged at the edge of the main stress surface of the anti-rotation pin, and the guiding fillet of the anti-rotation pin is used for guiding when the anti-rotation pin extends into the chute for the anti-rotation pin.

[0019] The beneficial effects of the present utility model are as follows:

[0020] Through the limitation of arranging the positioning hole on the pliers body and installing the piece to be locked on the pliers body, the rotation locking device realizes the positioning and assembly of the anti-rotation pin assembly on the piece to be locked. The above improvements expand the installation space of the rotation locking device, enabling the anti-rotation pin assembly to reliably fix the piece to be locked. The bearing capacity is strong enough, the force is reliable and the service life is long. Combined with the optimized design of the structure of the anti-rotation pin assembly, the synchronous rotation of the anti-rotation pin and the anti-rotation pin cover is avoided, and the situation of loosening at the anti-rotation pin cover caused by the change of the force at the anti-rotation pin is avoided. Therefore, while meeting the anti-rotation requirement for the piece to be locked, the risk of loosening of the anti-rotation pin assembly is reduced, the long-term stable operation of the rotation locking device is ensured, the reliability of rotation locking is improved, and the occupied space is reduced.

[0021] The brake utilizes the cooperation between the anti-rotation pin assembly and the anti-rotation pin chute to stop the nut body, enabling relative sliding between the anti-rotation pin and the nut body during the forward and backward movement of the nut body relative to the brake body. During the operation of the brake, the anti-rotation pin is fixed in the positioning hole, and the anti-rotation pin is inserted into the anti-rotation pin chute, thereby restricting the rotational freedom of the nut body and playing a role in restricting the rotation of the nut body. The design of setting the anti-rotation pin chute on the nut body takes into account the advantage of low difficulty in machining grooves on the outer cylindrical surface of the nut body, and the design of setting the positioning hole on the pliers body takes into account the advantage of low difficulty in machining holes on the outer cylindrical surface of the pliers body. The above two considerations overall reduce the machining difficulty. Using the anti-rotation pin assembly to stop the nut body on the brake body can reduce the number of components, reduce the total assembly time, and improve the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a sectional view of the brake provided in Embodiment 1 of the present utility model;

[0023] Figure 2 is Figure 1 a partial enlarged view of A in

[0024] Figure 3 is an exploded view of the anti-rotation pin assembly provided in Embodiment 1 of the present utility model;

[0025] Figure 4 is a structural schematic diagram of the anti-rotation pin assembly, nut body, and lead screw body provided in Embodiment 1 of the present utility model;

[0026] Figure 5 is a partial sectional view of the brake provided in Embodiment 2 of the present utility model.

[0027] In the figure:

[0028] 10. Brake body; 110. Pliers body; 120. Outer brake block; 130. Brake disc; 140. Inner brake block; 150. Nut body; 151. Anti-rotation pin chute; 160. Lead screw body; 170. Bearing assembly; 180. Motor drive unit;

[0029] 200. Anti-rotation pin assembly; 210. Anti-rotation pin cover; 211. Tightening tool hole; 212. Anti-rotation pin cover sealing groove; 213. Anti-rotation pin cover thread; 214. Anti-rotation pin cover riveting edge; 220. Sealing ring; 230. Anti-rotation pin; 231. Pin root; 232. Main stress surface of anti-rotation pin; 233. Anti-rotation pin guiding fillet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0034] Embodiment 1

[0035] As Figures 1 to 4As shown in the figure, the present embodiment provides a rotation locking device for preventing the rotation of a to-be-locked member. The rotation locking device includes a clamp body 110 and an anti-rotation pin assembly 200. The clamp body 110 is penetrated with a positioning hole, and the to-be-locked member is installed on the clamp body 110. The anti-rotation pin assembly 200 is inserted into the positioning hole. The anti-rotation pin assembly 200 includes an anti-rotation pin cover 210 and an anti-rotation pin 230. The anti-rotation pin 230 can rotate relative to the anti-rotation pin cover 210 around the axis of the anti-rotation pin 230. One end of the anti-rotation pin 230 extends out of the positioning hole, and the anti-rotation pin cover 210 is detachably installed at the other end of the positioning hole. The rotation of the to-be-locked member relative to the clamp body 110 is stopped when the to-be-locked member contacts the anti-rotation pin 230.

[0036] Through the setting of the positioning hole on the clamp body 110 and the limitation that the to-be-locked member is installed on the clamp body 110, the positioning and assembly of the anti-rotation pin assembly 200 on the to-be-locked member are realized. The above improvements expand the installation space of the rotation locking device, enabling the anti-rotation pin assembly 200 to reliably fix the to-be-locked member. It has a strong enough bearing capacity, reliable force application and a long service life. Combined with the optimized design of the structure of the anti-rotation pin assembly 200, the synchronous rotation of the anti-rotation pin 230 and the anti-rotation pin cover 210 is avoided, and the situation of loosening at the anti-rotation pin cover 210 caused by the force change at the anti-rotation pin 230 is avoided. Thus, while meeting the requirement of preventing the rotation of the to-be-locked member, the risk of loosening of the anti-rotation pin assembly 200 is reduced, ensuring the long-term stable operation of the rotation locking device, enhancing the reliability of rotation locking, and reducing the occupied space.

[0037] In this embodiment, one end of the anti-rotation pin 230 is a pin root 231, and the other end is a pin contact part. The pin contact part passes through the positioning hole, and the pin contact part is in anti-rotation cooperation with the positioning hole. The pin contact part is used to contact the to-be-locked member, and the to-be-locked member can move relative to the pin contact part. One end of the anti-rotation pin cover 210 is recessed with a blind hole, and a plurality of anti-rotation pin cover riveting edges 214 are circumferentially and uniformly distributed on the edge of the blind hole. The pin root 231 is in rotational cooperation with the blind hole, and both ends of the pin root 231 are respectively in contact with the bottom of the blind hole and the anti-rotation pin cover riveting edges 214.

[0038] Through the anti-rotation cooperation between the pin contact part and the positioning hole, the relative rotation between the pin contact part and the positioning hole is avoided, ensuring the relative movement between the to-be-locked member and the pin contact part. Combined with the rotational cooperation between the pin root 231 and the blind hole, the anti-rotation pin 230 can rotate relative to the anti-rotation pin cover 210 around the axis of the anti-rotation pin 230. The limitation that both ends of the pin root 231 are respectively in contact with the bottom of the blind hole and the anti-rotation pin cover riveting edges 214 avoids the situation that the pin root 231 detaches from the blind hole, ensuring the long-term stable operation of the anti-rotation pin assembly 200.

[0039] The above design enables the anti-rotation pin assembly 200 to be disassembled and assembled as a whole structure, and the installation is completed by screwing in during the assembly process, thereby reducing the assembly difficulty and improving the assembly convenience.

[0040] Furthermore, the riveting edge 214 of the anti-rotation pin cover is an L-shaped plate. The horizontal plate of the riveting edge 214 of the anti-rotation pin cover is fixedly connected to the anti-rotation pin cover 210, and the vertical plate of the riveting edge 214 of the anti-rotation pin cover is used to contact the pin root 231.

[0041] In this embodiment, the riveting edge 214 of the anti-rotation pin cover is a straight plate before processing. Before riveting, the anti-rotation pin 230 can be freely inserted into the blind hole. After the pin root 231 is installed in place and riveted with a riveting tool, the riveting edge 214 of the anti-rotation pin cover is pressed and deformed, changing from a straight plate to an L-shaped plate by the force. After the riveting edge 214 of the anti-rotation pin cover is pressed and deformed, the anti-rotation pin 230 can be positioned in the blind hole, and the pin root 231 can rotate in the blind hole but cannot come out.

[0042] After installing the sealing ring 220 and riveting the anti-rotation pin 230 in the blind hole, the anti-rotation pin assembly 200 is assembled. During the overall assembly process of the brake, using the anti-rotation pin assembly 200 can reduce the number of components, reduce the overall assembly time, and improve the assembly efficiency.

[0043] In this embodiment, the pin root 231 is a columnar part, and the axis of the pin root 231 coincides with the axis of the anti-rotation pin 230. The pin root 231 rotates relative to the anti-rotation pin cover 210 around the axis of the pin root 231.

[0044] Through the above structural optimization, the specific structure is simplified, the assembly difficulty and production cost of the anti-rotation pin 230 are reduced, and the space occupied by the anti-rotation pin assembly 200 is reduced.

[0045] Exemplarily, the anti-rotation pin assembly 200 further includes a sealing ring 220. The sealing ring 220 is sleeved on the side surface of the anti-rotation pin cover 210, and the sealing ring 220 is clamped between the anti-rotation pin cover 210 and the hole wall of the positioning hole.

[0046] By arranging the sealing ring 220 between the anti-rotation pin cover 210 and the hole wall of the positioning hole, the space between the two can be effectively filled, thereby playing a role in waterproofing and dustproofing, reducing the risk of damage to the rotation locking device, and extending the service life.

[0047] Furthermore, a sealing groove 212 of the anti-rotation pin cover is annularly provided on the side surface of the anti-rotation pin cover 210, and the sealing ring 220 is fitted and installed in the sealing groove 212 of the anti-rotation pin cover.

[0048] Through the design of installing the sealing ring 220 in the sealing groove 212 of the anti-rotation pin cover, the sealing ring 220 can be fixed in the sealing groove 212 of the anti-rotation pin cover, thereby reducing the risk of the sealing ring 220 shifting in position accidentally and ensuring the long-term stable operation of the anti-rotation pin assembly 200.

[0049] In this embodiment, an anti-rotation pin cover thread 213 is provided on the side surface of the anti-rotation pin cover 210, and the anti-rotation pin cover thread 213 is in close fit with the hole wall of the positioning hole.

[0050] By setting the anti-rotation pin cover thread 213, the installation stability of the anti-rotation pin cover 210 in the positioning hole is ensured, the long-term stable operation of the anti-rotation pin cover 210 is ensured, and the risk of the anti-rotation pin assembly 200 disengaging due to an accident is reduced.

[0051] Specifically, a hexagonal prism-shaped tightening tool hole 211 is provided at the other end of the anti-rotation pin cover 210. During the installation process, a hexagonal prism-shaped tool is inserted into the tightening tool hole 211, and after applying the installation torque, the anti-rotation pin cover 210 is fixed on the pliers body 110.

[0052] This embodiment also provides a brake, which includes a brake body 10 and the above-mentioned rotation locking device. The brake body 10 includes a nut body 150, the part to be locked is the nut body 150, an anti-rotation pin chute 151 is recessed on the surface of the nut body 150, a part of the anti-rotation pin 230 is placed in the anti-rotation pin chute 151, and the nut body 150 can move relative to the anti-rotation pin 230.

[0053] This brake uses the cooperation between the anti-rotation pin assembly 200 and the anti-rotation pin chute 151 to stop the nut body 150. When the nut body 150 moves back and forth relative to the brake body 10, relative sliding occurs between the anti-rotation pin 230 and the nut body 150. During the operation of the brake, the anti-rotation pin 230 is fixed in the positioning hole and does not move. The anti-rotation pin 230 is inserted into the anti-rotation pin chute 151, thereby restricting the rotational freedom of the nut body 150 and playing a role in restricting the rotation of the nut body 150. The design of setting the anti-rotation pin chute 151 on the nut body 150 takes into account the advantage of low difficulty in machining grooves on the outer cylindrical surface of the nut body 150. The design of setting the positioning hole on the pliers body 110 takes into account the advantage of low difficulty in machining holes on the outer cylindrical surface of the pliers body 110. The above two considerations overall reduce the machining difficulty. Using the anti-rotation pin assembly 200 to stop the nut body 150 on the brake body 10 can reduce the number of components, reduce the total assembly time, and improve the assembly efficiency.

[0054] Specifically, the brake body 10 further includes a caliper body 110, a motor drive unit 180, a lead screw body 160, a brake disc 130, an inner brake block 140, and an outer brake block 120. The lead screw body 160 is in transmission connection with a nut body 150. The nut body 150 is movably connected to the caliper body 110. The caliper body 110 serves as the housing of the nut body 150, and the rotation locking device is fixedly connected to the caliper body 110. Drilling is performed on the caliper body 110 for simple machining processes such as thread machining. The machining is simple and the machining cost is low. The motor drive unit 180 is fixed on the caliper body 110. The interior of the motor drive unit 180 consists of a motor, gears, etc. After the motor rotates, it drives the lead screw body 160 to rotate. The anti-rotation pin assembly 200 restricts the rotational freedom of the nut body 150. The nut body 150 can only translate and move along the axis direction of the cylinder hole of the caliper body 110, thereby pushing the inner brake block 140 towards the brake disc 130. The reaction force drives the caliper body 110 and the motor drive unit 180 to move in the opposite direction, and drives the outer brake block 120 to also move towards the brake disc 130, thus realizing the clamping process.

[0055] The specific components on the brake body 10 are conventional structures in the art. Their setting methods and working principles are common knowledge in the art and are well-known to those skilled in the art, so no more detailed description will be given here.

[0056] In this embodiment, two opposite main anti-rotation pin force-receiving surfaces 232 are provided on the side wall of the anti-rotation pin 230. When the nut body 150 comes into contact with the anti-rotation pin 230, the main anti-rotation pin force-receiving surfaces 232 are in fit with the wall of the anti-rotation pin chute 151, so that the nut body 150 and the anti-rotation pin 230 are in a rotation-stopping fit.

[0057] By setting the main anti-rotation pin force-receiving surfaces 232, the rotation of the anti-rotation pin 230 relative to the nut body 150 is restricted. The anti-rotation purpose is achieved by the plane contact between the main anti-rotation pin force-receiving surfaces 232 and the wall plane of the anti-rotation pin chute 151. Compared with line contact or point contact, plane contact has stronger load-bearing capacity, more reliable operation and longer service life.

[0058] Furthermore, the main anti-rotation pin force-receiving surfaces 232 are in rotation-stopping fit with the wall of the positioning hole. The edge of the main anti-rotation pin force-receiving surfaces 232 is provided with an anti-rotation pin guiding fillet 233, and the anti-rotation pin guiding fillet 233 is used for guiding when the anti-rotation pin 230 extends into the anti-rotation pin chute 151.

[0059] The anti-rotation pin guiding fillet 233 can play a guiding role during the sliding process to reduce the sliding resistance.

[0060] Embodiment Two

[0061] As Figure 5As shown in the figure, the rotation locking device of the second embodiment is basically the same as that of the first embodiment. The difference between the two is that the positioning hole includes a coaxial accommodating hole and an avoidance hole, and the aperture of the accommodating hole is larger than that of the avoidance hole; one end of the anti-rotation pin 230 is the pin root 231, and the other end is the pin contact part. The pin contact part is used to contact the part to be locked. The anti-rotation pin cover 210 and the accommodating hole enclose an accommodating cavity, and the pin root 231 is rotatably installed in the accommodating cavity. The anti-rotation pin 230 passes through the avoidance hole.

[0062] The fact that the pin root 231 is rotatably installed in the accommodating cavity makes the anti-rotation pin cover 210 and the anti-rotation pin 230 independent of each other, thus simplifying the structure of the anti-rotation pin assembly 200 and reducing the manufacturing difficulty of the production cost of the anti-rotation pin assembly 200. The rotation locking device assembled through the above process does not affect the overall function, reduces the assembly difficulty, and reduces the risk of the anti-rotation pin 230 shifting in position due to accidents.

[0063] As Figures 1 to 5 shown in the figure, this embodiment also provides a brake, which includes a brake body 10 and the above rotation locking device. The brake body 10 includes a nut body 150. The part to be locked is the nut body 150. An anti-rotation pin chute 151 is recessed on the surface of the nut body 150. Part of the anti-rotation pin 230 is placed in the anti-rotation pin chute 151, and the nut body 150 can move relative to the anti-rotation pin 230.

[0064] This brake uses the cooperation between the anti-rotation pin assembly 200 and the anti-rotation pin chute 151 to stop the nut body 150, so that relative sliding occurs between the anti-rotation pin 230 and the nut body 150 during the forward and backward movement of the nut body 150 relative to the brake body 10. During the working process of the brake, the anti-rotation pin 230 is fixed in the positioning hole and does not move. The anti-rotation pin 230 is inserted into the anti-rotation pin chute 151, thereby restricting the rotational freedom of the nut body 150 and playing a role in restricting the rotation of the nut body 150. The design of setting the anti-rotation pin chute 151 on the nut body 150 takes into account the advantage that it is easier to machine a groove on the outer cylindrical surface of the nut body 150. The design of setting the positioning hole on the clamp body 110 takes into account the advantage that it is easier to machine a hole on the outer cylindrical surface of the clamp body 110. The above two considerations overall reduce the machining difficulty. Using the anti-rotation pin assembly 200 on the brake body 10 to stop the nut body 150 can reduce the number of components, reduce the total assembly time, and improve the assembly efficiency.

[0065] Specifically, the brake body 10 further includes a caliper body 110, a bearing assembly 170, a motor drive unit 180, a lead screw body 160, a brake disc 130, an inner brake block 140, and an outer brake block 120. The lead screw body 160 is in transmission cooperation with the nut body 150, and the lead screw body 160 is rotatably connected to the caliper body 110 through the bearing assembly 170. The nut body 150 is movably connected to the caliper body 110. The caliper body 110 serves as the housing of the nut body 150, and the rotation locking device is fixedly connected to the caliper body 110. Drilling is performed on the caliper body 110 for simple machining processes such as threading. The machining is simple and the machining cost is low. The motor drive unit 180 is fixed on the caliper body 110. The inside of the motor drive unit 180 is composed of a motor, gears, etc. After the motor rotates, it drives the lead screw body 160 to rotate. The anti-rotation pin assembly 200 restricts the rotational freedom of the nut body 150. The nut body 150 can only translate and move along the axis direction of the cylinder hole of the caliper body 110 inside the caliper body 110, thereby pushing the inner brake block 140 towards the brake disc 130. The reaction force drives the caliper body 110 and the motor drive unit 180 to move in the opposite direction, and drives the outer brake block 120 to also move towards the brake disc 130, thus realizing the clamping process.

[0066] The specific components on the brake body 10 are conventional structures in the art. Their setting methods and working principles are common knowledge in the art and are well-known to those skilled in the art, so no further elaboration will be made here.

[0067] In the general assembly of the brake, first press the anti-rotation pin 230 into the positioning hole, and then tighten the anti-rotation pin cover 210.

[0068] In this embodiment, two opposite main anti-rotation pin force-receiving surfaces 232 are provided on the side wall of the anti-rotation pin 230; when the nut body 150 comes into contact with the anti-rotation pin 230, the main anti-rotation pin force-receiving surfaces 232 are in fit with the wall of the anti-rotation pin chute 151, so that the nut body 150 and the anti-rotation pin 230 are in anti-rotation cooperation.

[0069] By setting the main anti-rotation pin force-receiving surfaces 232, the rotation of the anti-rotation pin 230 relative to the nut body 150 is restricted. The anti-rotation purpose is achieved by the flat contact between the main anti-rotation pin force-receiving surfaces 232 and the wall plane of the anti-rotation pin chute 151. Compared with line contact or point contact, flat contact has stronger load-bearing capacity, more reliable work and longer service life.

[0070] Furthermore, the main anti-rotation pin force-receiving surfaces 232 are in anti-rotation cooperation with the wall of the positioning hole; a guide fillet 233 of the anti-rotation pin is provided at the edge of the main anti-rotation pin force-receiving surfaces 232. The guide fillet 233 of the anti-rotation pin is used for guiding when the anti-rotation pin 230 extends into the anti-rotation pin chute 151.

[0071] The anti-rotation pin guiding fillet 233 can play a guiding role during the sliding process to reduce the sliding resistance.

[0072] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A rotation locking device for preventing rotation of a to-be-locked member, characterized in that, Comprising: A pliers body (110) having a positioning hole therethrough, and the to-be-locked member is installed on the pliers body (110); An anti-rotation pin assembly (200) is inserted through the positioning hole. The anti-rotation pin assembly (200) includes an anti-rotation pin cover (210) and an anti-rotation pin (230). The anti-rotation pin (230) can rotate relative to the anti-rotation pin cover (210) around the axis of the anti-rotation pin (230). One end of the anti-rotation pin (230) extends out of the positioning hole, and the anti-rotation pin cover (210) is detachably installed at the other end of the positioning hole. The rotation of the to-be-locked member relative to the pliers body (110) is stopped when the to-be-locked member contacts the anti-rotation pin (230).

2. The rotary locking device according to claim 1, wherein, One end of the anti-rotation pin (230) is a pin root portion (231), and the other end is a pin contact portion. The pin contact portion passes through the positioning hole, and the pin contact portion is in non-rotating fit with the positioning hole. The pin contact portion is used to contact the to-be-locked member, and the to-be-locked member can move relative to the pin contact portion. One end of the anti-rotation pin cover (210) is recessed with a blind hole, and a plurality of anti-rotation pin cover riveting edges (214) are circumferentially distributed on the edge of the blind hole. The pin root portion (231) is in rotational fit with the blind hole, and both ends of the pin root portion (231) are respectively in contact with the bottom of the blind hole and the anti-rotation pin cover riveting edge (214).

3. The rotational locking device according to claim 2, wherein The anti-rotation pin cover riveting edge (214) is an L-shaped plate. The horizontal plate of the anti-rotation pin cover riveting edge (214) is fixedly connected to the anti-rotation pin cover (210), and the vertical plate of the anti-rotation pin cover riveting edge (214) is used to contact the pin root portion (231).

4. The rotational locking device according to claim 1, wherein The positioning hole includes a coaxially connected accommodating hole and an avoidance hole. The aperture of the accommodating hole is larger than that of the avoidance hole. One end of the anti-rotation pin (230) is a pin root portion (231), and the other end is a pin contact portion. The pin contact portion is used to contact the to-be-locked member. The anti-rotation pin cover (210) and the accommodating hole enclose an accommodating cavity, and the pin root portion (231) is rotatably installed in the accommodating cavity. The anti-rotation pin (230) passes through the avoidance hole.

5. The rotational locking device according to claim 2 or 4, characterized in that The pin root portion (231) is a columnar member, and the axis of the pin root portion (231) coincides with the axis of the anti-rotation pin (230). The pin root portion (231) rotates relative to the anti-rotation pin cover (210) around the axis of the pin root portion (231).

6. The rotational locking device according to claim 2 or 4, characterized in that, The anti-rotation pin assembly (200) further includes a sealing ring (220). The sealing ring (220) is sleeved on the side surface of the anti-rotation pin cover (210), and the sealing ring (220) is clamped between the anti-rotation pin cover (210) and the hole wall of the positioning hole.

7. The rotational locking device according to claim 6, characterized in that, The side surface of the anti-rotation pin cover (210) is provided with an anti-rotation pin cover sealing groove (212), and the sealing ring (220) is fitted and installed in the sealing ring (220).

8. The rotational locking device according to claim 2 or 4, characterized in that, The side surface of the anti-rotation pin cover (210) is provided with an anti-rotation pin cover thread (213), and the anti-rotation pin cover thread (213) is in close fit with the hole wall of the positioning hole.

9. Brake, characterized in that, Comprising a brake body (10) and the rotational locking device according to any one of claims 1-8, the brake body (10) includes a nut body (150), the member to be locked is the nut body (150), a rotation prevention pin chute (151) is recessed on the surface of the nut body (150), a part of the rotation prevention pin (230) is placed in the rotation prevention pin chute (151), and the nut body (150) can move relative to the rotation prevention pin (230).

10. The brake according to claim 9, characterized in that, Two opposite main force-bearing surfaces (232) of the rotation prevention pin are provided on the side wall of the rotation prevention pin (230); when the nut body (150) comes into contact with the rotation prevention pin (230), the main force-bearing surface (232) of the rotation prevention pin is in fit with the groove wall of the rotation prevention pin chute (151), so that the nut body (150) and the rotation prevention pin (230) are in a rotation prevention fit.

11. The brake according to claim 10, characterized in that, The main force-bearing surface (232) of the rotation prevention pin is in a rotation prevention fit with the hole wall of the positioning hole; a rotation prevention pin guiding fillet (233) is provided at the edge of the main force-bearing surface (232) of the rotation prevention pin, and the rotation prevention pin guiding fillet (233) is used for guiding when the rotation prevention pin (230) extends into the rotation prevention pin chute (151).

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