A lock and a trailer hitch

Abstract

This utility model provides a trailer hitch, including a connector and a tow hook detachably connected to the connector. The connector has an open-bottomed connector cavity. The tow hook includes a connector end that inserts into the connector cavity. One end of the connector end extending into the connector cavity has a mounting cavity. A push rod assembly is provided in the mounting cavity. The push rod assembly fixes the connector end into the connector cavity, and the push rod assembly is locked by a locking assembly. During disassembly, the push rod assembly can be unlocked by the locking assembly before the tow hook can be removed from the connector, reducing the risks associated with the trailer hitch.

Description

Technical Field

[0001] This utility model relates to the field of trailer technology, and in particular to a lock and trailer hook. Background Technology

[0002] As people's lifestyles continue to change, more and more people have higher demands for the towing capabilities of their vehicles. Currently, most vehicles use fixed tow hooks, which are directly or indirectly connected to the vehicle's support structure via an adapter chassis. The problem with this installation method is that since the hook part of the tow hook permanently extends beyond the rear bumper, it reduces the vehicle's aesthetics and weakens the safety function of the rear bumper, posing a safety hazard to users.

[0003] The above problems can be solved by detachable trailer hitches, but in the existing technology, detachable designs are usually fixed with screws, which can be removed with ordinary tools or even unscrewed by hand, which makes it possible for the trailer hitch to be stolen or lost. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a tow hook that aims to solve the problem in the prior art where the hook part of the tow hook permanently extends beyond the rear bumper, thus reducing the aesthetics of the car and weakening the safety function of the rear bumper, posing a safety hazard to the user. In addition, the tow hook extending beyond the rear bumper may damage other vehicles during parking operations, causing economic losses to the user.

[0005] This utility model provides a lock, including a mounting sleeve, a lock sleeve, and a lock cylinder. The mounting sleeve has an open mounting chamber at one end, and the lock sleeve is installed in the mounting chamber. The lock sleeve has an open mounting channel at both ends, and the lock cylinder is installed in the mounting channel. The lock sleeve has a locking hole, and the lock cylinder has a locking protrusion corresponding to the locking hole. A locking elastic element is provided between the lock cylinder and the inner bottom wall of the mounting chamber. In the locked state, the locking protrusion is engaged in the locking hole, and the locking elastic element is compressed by the lock cylinder along a first direction. In the unlocked state, the locking protrusion disengages from the locking hole, and the locking elastic element ejects the lock cylinder along a second direction, wherein the first direction and the second direction are opposite.

[0006] Furthermore, a lever assembly is connected to the end of the lock cylinder extending into the mounting channel, and the locking protrusion protrudes from the lever assembly. The lock cylinder is rotatably connected to the mounting channel, and the lock cylinder drives the locking protrusion to disengage from the locking hole by rotation.

[0007] Furthermore, the paddle assembly includes a rotary paddle and a locking paddle. The rotary paddle is connected to the lock cylinder. A rotary lever is protruding from the rotary paddle. The rotary lever extends along the first direction and is offset from the central axis of the lock cylinder. A locking protrusion is formed on the locking paddle. A slotted hole corresponding to the rotary lever is opened on the locking paddle. The rotary lever is inserted into the slotted hole. The lock cylinder is used to drive the rotary lever to rotate around the central axis of the lock cylinder, thereby causing the rotary lever to slide in the slotted hole to drive the locking protrusion to disengage from the locking hole.

[0008] Furthermore, the rotary lever has a locking hole, which includes a vertical edge and a curved edge connected to each other. The locking hole is a non-circular closed curve, and the end of the lock cylinder is adapted to the locking hole to drive the rotary lever to rotate.

[0009] Furthermore, the lock lever has a receiving groove, and a lever elastic element is provided between the receiving groove and the inner peripheral wall of the lock sleeve. In the locked state, the lever elastic element drives the locking protrusion to engage in the locking hole. In the unlocked state, the locking protrusion disengages from the locking hole and the lever elastic element is compressed.

[0010] Furthermore, a locking element is provided between the locking lever and the inner bottom wall of the mounting chamber. The locking element includes a rod and a top block. One end of the rod is connected to the top block, and the other end extends to the outside of the mounting sleeve. The locking elastic element is located between the top block and the locking sleeve.

[0011] Furthermore, a sliding groove is provided on the top block, and the locking lever is movably accommodated in the sliding groove.

[0012] Furthermore, an arc-shaped groove is provided at the bottom of the slide, and the paddle elastic element is a spring. The arc-shaped groove is used to accommodate the paddle elastic element.

[0013] Furthermore, the lock sleeve has a strip-shaped groove, which allows the locking protrusion to pass through and enter the locking hole.

[0014] This utility model provides a trailer hitch, including the lock as described in any of the above claims.

[0015] Beneficial Effects: This utility model provides a trailer hitch, including a connector and a tow hook detachably connected to the connector. The connector has an open-bottomed connector cavity. The tow hook includes a connector end that inserts into the connector cavity. One end of the connector end extending into the connector cavity has a mounting cavity. A push rod assembly is provided in the mounting cavity. The push rod assembly fixes the connector end into the connector cavity, and the push rod assembly is locked by a locking assembly. During disassembly, the push rod assembly can be unlocked by the locking assembly before the tow hook can be removed from the connector, reducing the risks associated with the trailer hitch. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the trailer hook and the connector of this utility model when they are connected.

[0018] Figure 2 for Figure 1 Sectional view along the AA direction;

[0019] Figure 3 for Figure 1 Cross-sectional view along the BB direction;

[0020] Figure 4 This is a schematic diagram of the structure of the trailer hook and the connector of this utility model during disassembly;

[0021] Figure 5 This is a schematic diagram of the structure when the top rod assembly and the lock assembly of this utility model are connected;

[0022] Figure 6 This is an exploded view of the structure of the push rod assembly of this utility model;

[0023] Figure 7 This is an exploded view of the structure of the lock assembly of this utility model;

[0024] Figure 8 This is a schematic diagram of the structure of the lock assembly of this utility model when connected to the top rod lever;

[0025] Figure 9 This is a schematic diagram of the structure of the lock assembly of this utility model when connected to the top rod lever (excluding the mounting sleeve).

[0026] Figure 10 This is a schematic diagram of the connection between the lock cylinder, rotary lever, lock lever, and locking component of this utility model.

[0027] Figure 11 This is a schematic diagram of the structure of the rotary lever, locking lever, and locking element of this utility model when they are connected;

[0028] Figure 12 This is an exploded view of the structure of the rotary lever, locking lever, and locking component of this utility model;

[0029] Figure 13 This is an exploded view of the structure of the card holder and drive rod of this utility model.

[0030] In the diagram: 1. Plug-in socket; 11. Plug-in cavity; 111. First groove; 12. Limiting groove; 2. Hook; 21. Plug-in end; 211. Through hole; 212. Limiting block; 22. Mounting cavity; 221. First cavity; 222. Second cavity; 223. Drive elastic element; 224. Drive rod; 3. Push rod assembly; 31. First push rod; 311. Pressing section; 312. Gap section; 314. Inclined section; 315. Slot; 32. Ball bearing; 33. Push rod elastic element; 4. Lock assembly; 41. Mounting sleeve; 411. Mounting chamber; 412. Handle lever; 4 13. Locking hole; 42. Lock sleeve; 421. Installation channel; 422. Strip groove; 43. Lock cylinder; 44. Locking elastic element; 5. Turning handle; 6. Top rod lever; 61. Top rod strip hole; 62. Insertion hole; 7. Rotating lever; 71. Rotating lever; 8. Locking lever; 81. Locking plate strip hole; 82. Receiving groove; 83. Lever element; 84. Locking protrusion; 9. Locking element; 91. Insert rod; 92. Top block; 921. Slide groove; 922. Arc groove; 10. Locking seat; 101. First mounting groove; 102. Locking element; 103. Locking element elastic element. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0032] Please see Figures 1 to 13 This utility model provides a trailer hitch, including a connector 1 and a tow hook 2 detachably connected to the connector 1. The connector 1 has a connector cavity 11 with an open bottom. The tow hook 2 includes a connector end 21 that is inserted into the connector cavity 11. One end of the connector end 21 extending into the connector cavity 11 has a mounting cavity 22. A push rod assembly 3 is provided in the mounting cavity 22. The push rod assembly 3 is used to fix the connector end 21 in the connector cavity 11. A locking assembly 4 is provided at the end of the connector end 21 extending out of the connector cavity 11. The locking assembly 4 is used to lock the push rod assembly 3.

[0033] In this application, the trailer hitch is a vehicle accessory. The tow hook 2 can be installed on the connector 1 when needed, or removed from the connector 1 after use. The trailer hitch of this application is configured such that the connector 1 is an accessory fixed to the vehicle body, with its bottom open. The connector end 21 can be inserted into the connector cavity 11 from the bottom of the connector 1, and the tow hook 2 is U-shaped.

[0034] According to some embodiments of the present invention, the push rod assembly 3 includes a first push rod 31, a ball bearing 32, and a push rod elastic member 33. The end of the insertion end 21 extending into the insertion cavity 11 has several through holes 211. The ball bearing 32 is movably installed in the through holes 211. The push rod assembly 3 is movably installed in the mounting cavity 22. The push rod elastic member 33 is connected to the first push rod 31. The first push rod 31 includes a pressing section 311 and a gap section 312. The diameter of the pressing section 311 is larger than the diameter of the gap section 312. A first groove 111 is formed on the inner wall of the insertion cavity 11. The push rod elastic member 33 is used to drive the... The first push rod 31 moves along a first direction and aligns the abutting section 311 with the through hole 211, thereby pressing the ball 32 against the first groove 111, fixing the plug seat 1 and the hook 2 in the first direction. The first push rod 31 is used to move along a second direction to compress the push rod elastic element 33 and align the gap section 312 with the through hole 211, so that the ball 32 can disengage from the first groove 111, thereby separating the plug seat 1 and the hook 2 along the second direction, the first direction being opposite to the second direction. The locking assembly 4 is used to lock the first push rod 31. Understandably, since the diameter of the pressing section 311 in the first push rod 31 is larger than the diameter of the gap section 312, when the pressing section 311 moves to the position corresponding to the through hole 211, the pressing section 311 compresses the space of the ball 32 in the mounting cavity 22. A portion of the ball 32 is squeezed into the first groove 111, and the other portion remains in the through hole 211, thus fixing the insertion end 21 and the insertion seat 1 relatively. Therefore, under the elastic action of the push rod elastic element 33, the pressing section 311 is driven to maintain the compression of the ball 32. When disassembly is required, the gap section 312 in the first push rod 31 is driven to move to the position corresponding to the through hole 211. The space between the gap section 312 and the mounting cavity 22 increases, allowing a portion of the ball 32 to enter the mounting cavity 22, while the other portion remains in the through hole 211. Since the ball detaches from the first groove 111, the insertion end 21 and the insertion seat 1 can be separated, thus completing the disassembly. In one specific embodiment, the push rod elastic element 33 is a spring, and the first push rod 31 passes through the spring. The spring is located below the abutting section 311, and the gap section 312 is located above the abutting section 311. Therefore, the spring force is upward, i.e., the first direction is vertically upward, and the second direction is vertically downward. During installation, the opening of the insertion cavity 11 faces downward, and the insertion end 21 enters the insertion cavity 11 vertically.

[0035] To prevent the ball bearing 32 from jamming when switching between the gap section 312 and the abutment section 311, the gap section 312 and the abutment section 311 are connected by an inclined section 314. The ball bearing 32 can switch between the gap section 312 and the abutment section 311 through the inclined section 314.

[0036] According to some embodiments of the present invention, a first driving member is provided on one end of the plug-in end 21 extending outside the plug-in cavity 11, the lock assembly 4 is installed in the first driving member, the first driving member is connected to the top rod, and the first driving member can be held by hand to drive the top rod to move along the second direction.

[0037] Furthermore, the first driving component is a rotary handle 5, which is rotatably connected to one end of the insertion end 21 extending to the outside of the insertion cavity 11. The lock assembly 4 is installed inside the rotary handle 5, and the rotary handle 5 is used to rotate to drive the first push rod 31 to move in the second direction.

[0038] According to some embodiments of the present invention, the lock assembly 4 includes a mounting sleeve 41, a lock sleeve 42, and a lock cylinder 43. The mounting sleeve 41 is mounted on the turning handle 5 and has a mounting chamber 411 with an open end. The lock sleeve 42 is mounted in the mounting chamber 411 and has a mounting channel 421 with open ends. The lock cylinder 43 is mounted in the mounting channel 421. The lock sleeve 42 has a locking hole 413, and the lock cylinder 43 has a protruding part that engages with the lock cylinder 43. A locking protrusion 84 corresponds to the stop hole 413. A locking elastic element 44 is provided between the lock cylinder 43 and the inner bottom wall of the mounting cavity 22. In the locked state, the locking protrusion 84 is engaged in the lock hole 413, and the locking elastic element 44 is compressed by the lock cylinder 43 along a third direction. In the unlocked state, the locking protrusion 84 disengages from the lock hole 413, and the locking elastic element 44 ejects the lock cylinder 43 along a fourth direction, which is opposite to the direction of the third and fourth directions. In this embodiment, when the key is inserted into the lock cylinder 43, the teeth of the key push the upper / lower pins in the lock cylinder 43 to a specific height, aligning the shear line at the junction of all the upper / lower pins, allowing the lock cylinder 43 to rotate relative to the lock sleeve 42. In this embodiment, both the third and fourth directions are located in the horizontal direction. In this embodiment, the mounting sleeve 41 has irregular edges. When the mounting sleeve 41 is mounted on the screw handle 5, the screw handle 5 can drive the mounting sleeve 41 to rotate, or the mounting sleeve 41 can drive the screw handle 5 to rotate.

[0039] According to some embodiments of this utility model, a push rod lever 6 is connected to one end of the first push rod 31 extending outside the mounting cavity 22. The push rod lever 6 has a push rod slot 61, the extension direction of which is perpendicular to the second direction. A handle lever 412 protrudes from the central axis of the rotary handle 5. The handle lever 412 is inserted into the push rod slot 61. The rotary handle 5 drives the handle lever 412 to rotate around its central axis, thereby causing the handle lever 412 to slide within the push rod slot 61 to drive the first push rod 31 to move along the second direction. In this embodiment, the handle lever 412 deviates from the central axis of the rotary handle 5. During rotation, its interaction with the push rod slot 61 converts the rotational motion of the handle lever 412 into the linear motion of the first push rod 31. Accordingly, when the first push rod 31 moves in a straight line, the engagement between the handle lever 412 and the push rod slot 61 converts the linear motion of the first push rod 31 into the rotational motion of the handle lever 412.

[0040] According to some embodiments of the present invention, a rotary lever 7 is connected to the end of the lock cylinder 43 extending into the mounting channel 421. A rotary lever 71 is protruding from the rotary lever 7. A locking lever 8 is connected to the rotary lever 7. A locking protrusion 84 is formed on the locking lever 8. The rotary lever 71 extends along the first direction and deviates from the central axis of the lock cylinder 43. A locking plate slot 81 corresponding to the rotary lever 71 is opened on the locking lever 8. The rotary lever 71 is inserted into the locking plate slot 81. The lock cylinder 43 is used to drive the rotary lever 71 to rotate around the central axis of the lock cylinder 43, thereby causing the rotary lever 71 to slide in the locking plate slot 81 to drive the locking protrusion 84 to disengage from the locking hole 413. In this embodiment, the rotary lever 7 has a locking hole, which includes a vertical edge and a curved edge connected to each other. The curved edge is a non-circular closed curve. The end of the lock cylinder 43 is adapted to the locking hole to drive the rotary lever 7 to rotate. Since the rotary lever 71 is off-center from the central axis of the lock cylinder 43, the engagement between the rotary lever 71 and the lock plate slot 81 during the rotation of the lock cylinder 43 converts the rotational motion of the rotary lever 71 into the linear motion of the lock lever 8. Correspondingly, when the lock lever 8 performs linear motion, the engagement between the rotary lever 71 and the lock plate slot 81 converts the linear motion of the lock lever 8 into the rotational motion of the rotary lever 71. In this embodiment, the rotary lever 7 is used to drive the lock cylinder 43 to rotate, or the lock cylinder 43 rotates the rotary lever 7.

[0041] According to some embodiments of this utility model, the locking lever 8 has a receiving groove 82, and a lever elastic member 83 is provided between the receiving groove 82 and the inner peripheral wall of the lock sleeve 42. In the locked state, the lever elastic member 83 drives the locking protrusion 84 to engage in the locking hole 413. In the unlocked state, the locking protrusion 84 disengages from the locking hole 413 and the lever elastic member 83 is compressed. In this embodiment, the lever elastic member 83 is a spring.

[0042] According to some embodiments of this utility model, a locking member 9 is provided between the locking lever 8 and the inner bottom wall of the mounting chamber 411. The locking member 9 includes a plug rod 91 and a top block 92. One end of the plug rod 91 is connected to the top block 92, and the other end extends to the outside of the mounting sleeve 41. A locking elastic member 44 is provided between the top block 92 and the locking sleeve 42. A plug hole 62 is provided on the top rod lever 6, and the locking elastic member 44 is used to drive the plug rod 91 to insert into the plug hole 62 to lock the first top rod 31. Further, a sliding groove 921 is provided on the top block 92, and the locking lever 8 is movably accommodated in the sliding groove 921. Since the first top rod 31 is held in the position corresponding to the through hole 211 by the top rod elastic member 33, the ball 32 is continuously allowed to enter the first groove 111. During vehicle operation, bumps can cause the first push rod 31 to shift, potentially leading to a misalignment between the clamping section 311 and the through hole 211, causing the insertion end 21 to disengage from the insertion cavity 11. When the insertion rod 91 is inserted into the insertion hole 62, the first push rod 31 is locked, preventing it from shifting. Simultaneously, since the handle lever 412 on the mounting sleeve 41 is inserted into the push rod slot 61, the mounting sleeve 41 is also fixed in place when the first push rod 31 cannot move, preventing the handle 5 from rotating. Therefore, the lock assembly 4 can lock the push rod assembly 3, preventing accidental activation of the handle 5 without a key to unlock the lock cylinder 43, and effectively preventing the tow hook from being stolen.

[0043] Furthermore, an arc-shaped groove 922 is provided at the bottom of the slide groove 921, the paddle elastic element 83 is a spring, and the arc-shaped groove 922 is used to accommodate the paddle elastic element 83.

[0044] Furthermore, the lock sleeve 42 is provided with a strip groove 422, which allows the locking protrusion 84 to pass through and enter the locking hole 413.

[0045] In a preferred embodiment, the mounting cavity 22 is provided with a retaining seat 10, which is used to engage with the first push rod 31 so that the first push rod 31 continuously compresses the push rod elastic member 33. Specifically, the retaining seat 10 has a first mounting groove 101 in its radial direction, and a retaining member 102 and a retaining member 102 elastic member are rotatably connected in the first mounting groove 101. The end of the first push rod 31 extending onto the retaining seat 10 has a retaining groove 315, and the retaining member 102 elastic member is used to drive the retaining member 102 to engage into the retaining groove 315 so that the first push rod 31 continuously compresses the push rod elastic member 33.

[0046] Furthermore, the mounting cavity 22 is divided into a first cavity 221 and a second cavity 222 by the mounting bracket 10. The first cavity 221 is used to accommodate the rod body of the first push rod 31. The second cavity 222 is for the end of the first push rod 31 with the slot 315 to enter. The second cavity 222 is provided with a driving elastic element 223 and a driving rod 224. One end of the driving rod 224 extends into the second cavity 222 and the other end extends out of the second cavity 222. When the insertion end 21 is inserted into the insertion cavity 11, the driving rod 224 is used to move along the second direction to drive the mounting bracket 102 to separate from the slot 315. When the insertion end 21 is pulled out into the insertion cavity 11, the driving elastic element 223 is used to drive the driving rod 224 to move along the first direction so that the mounting bracket 102 is engaged in the slot 315.

[0047] Furthermore, the end of the drive rod 224 extending into the second cavity 222 has a drive ramp, which is used to drive the card 102 to separate from the card slot 315 when the drive rod 224 moves along the first direction.

[0048] Furthermore, a limiting groove 12 is formed on the plug-in base 1, and a limiting block 212 corresponding to the limiting groove 12 is protruding on the plug-in end 21. The limiting block 212 is engaged in the limiting groove 12 to fix the plug-in base 1 and the tow hook 2 in the circumferential direction. In some preferred embodiments, the first groove 111 is an annular groove to facilitate the ball bearing 32 to enter the first groove 111 in the horizontal direction. Correspondingly, the plug-in end 21 is cylindrical, and the plug-in cavity 11 is also cylindrical. Without the limiting block 212, the plug-in end 21 is prone to rotate relative to the plug-in cavity 11, resulting in reduced stability of the tow hook. Therefore, the limiting block 212 effectively prevents the plug-in end 21 from rotating circumferentially relative to the plug-in cavity 11.

[0049] The working principle of the trailer hook in this application will be explained in conjunction with the above-described embodiments. When the trailer hook 2 is separated from the plug-in seat 1, the first push rod 31 compresses the push rod elastic member 33. Under the elastic force of the locking member 102, the locking member 102 is engaged in the locking groove 315, so that the first push rod 31 continues to compress the push rod elastic member 33. At the same time, the gap section 312 corresponds to the position of the through hole 211, and a space is reserved between the gap section 312 and the mounting cavity 22 for the ball bearing 32 to enter. Under the action of the driving elastic member 223, the end of the driving rod 224 extends to the outside of the second cavity 222, that is, the end of the driving rod 224 is exposed outside the plug-in end 21. At the same time, under the elastic force of the locking elastic member 44, the plug rod 91 disengages from the plug-in hole 62, the locking protrusion 84 disengages from the locking hole 413, and the paddle elastic member 83 is compressed. As the locking protrusion 84 disengages from the locking hole 413, under the elastic force of the locking elastic element 44, the top block 92, the rotary lever 7, the locking lever 8, the lock sleeve 42, and the lock cylinder 43 are pressed into the mounting sleeve 41. The locking protrusion 84 abuts against the inner peripheral wall of the mounting sleeve 41, and the end faces of the lock cylinder 43 and the lock sleeve 42 protrude more than the end face of the turning handle 5. At this time, when the key is inserted into the lock cylinder 43, the locking lever 8 drives the rotary lever 7 to rotate, which in turn drives the lock cylinder 43 to rotate relative to the lock sleeve 42. The lock cylinder 43 cannot be reset, and the key cannot be pulled out, effectively preventing the key from being accidentally pulled out. At the same time, the above component status indicates that the first top rod 31 has not been locked.

[0050] When the hook 2 needs to be installed on the connector 1, the connector end 21 is aligned with the connector cavity 11, and the hook 2 is pushed vertically upward. Since the end of the drive rod 224 is exposed outside the connector end 21, the end of the drive rod 224 first abuts against the upper wall of the mounting cavity 22. During the vertical upward movement of the connector end 21, the drive rod 224 is pressed and displaced vertically downward, and the drive ramp first abuts against the locking piece 102. Under the action of the drive ramp, the locking piece 102 rotates, and the elastic element of the locking piece 102 is further compressed until the locking piece 102 separates from the slot 315. At this time, the position of the through hole 211 corresponds exactly to the position of the first groove 111. Since the first push rod 31 lacks the fixing effect of the locking piece 102, under the action of the elastic element 33, the first push rod 31 displaces vertically upward, and the pressing section 311 pushes the ball 32 out of the first groove 111, thereby fixing the connector end 21 in the connector cavity 11. As the first push rod 31 moves upward, it simultaneously drives the push rod lever 6 to move upward. Since the handle lever 412 is inserted into the push rod slot 61, during the upward movement of the push rod lever 6, the handle lever 412 slides within the push rod slot 61, thereby causing the mounting sleeve 41 to rotate. Since the mounting sleeve 41 is connected to the turning handle 5, it causes the turning handle 5 to reset. At this time, the insertion end 21 is fixed in the insertion cavity 11. Since the end faces of the lock cylinder 43 and the lock sleeve 42 are more prominent than the end face of the turning handle 5, pressing the end faces of the lock cylinder 43 and the lock sleeve 42 causes the lock cylinder 43, the lock sleeve 42, the lock lever 8, the turning lever 7, and the push block 92 to move within the mounting sleeve 41, and the locking elastic element 44 is compressed by the push block 92. Until the end faces of the lock cylinder 43 and the lock sleeve 42 are aligned with the end face of the rotary handle 5, the locking protrusion 84 on the lock lever 8 moves to correspond to the position of the locking hole 413. Under the elastic force of the lever elastic element 83, the lock lever 8 moves, and the locking protrusion 84 enters the locking hole 413. The rotary lever 71, which is inserted into the lock plate slot 81, drives the lock cylinder 43 to rotate relative to the lock sleeve 42 and thus reset, allowing the key to be removed. During the movement of the lock lever 8, the insertion rod 91 is inserted into the insertion hole 62, locking the first push rod 31. It is worth noting that when the handle 5 has not yet moved the first push rod 31 to the position corresponding to the insertion rod 91 and the insertion hole 62, pressing the end faces of the lock cylinder 43 and the lock sleeve 42 will cause the first push rod 31 to block the push rod. At this time, the end faces of the lock cylinder 43 and the lock sleeve 42 cannot remain flat, and the locking protrusion 84 cannot be displaced to correspond to the locking hole 413, thereby effectively preventing the key from being pulled out before the first push rod 31 is locked.

[0051] When it is necessary to remove the hook 2 from the socket 1, insert the key into the lock cylinder 43. The lock cylinder 43 can rotate relative to the lock sleeve 42. Turning the key drives the lock cylinder 43 to rotate, which in turn drives the rotary lever 7 to rotate. During the rotation of the rotary lever 7, the rotary lever 71 inserted into the lock plate slot 81 drives the lock lever 8 to move. The lever elastic element 83 is compressed by the lock lever 8, and the locking protrusion 84 disengages from the locking hole 413. Under the action of the locking elastic element 44, the top block 92, rotary lever 7, lock lever 8, lock sleeve 42, and lock cylinder 43 move within the mounting sleeve 41. The locking protrusion 84 abuts against the inner peripheral wall of the mounting sleeve 41. The end faces of the lock cylinder 43 and lock sleeve 42 are more prominent than the end face of the turning handle 5. The insertion rod 91 disengages from the socket 62, the first top rod 31 is unlocked, and the mounting sleeve 41 is rotated by turning the handle 5. Since the handle lever 412 on the mounting sleeve 41 is inserted into the push rod slot 61, the handle lever 412 drives the push rod paddle 6 to drive the first push rod 31 to move, and the first push rod 31 compresses the push rod elastic element 33. When the first push rod 31 moves to the position where the gap section 312 corresponds to the through hole 211, the ball 32 disengages from the first groove 111 and enters the mounting cavity 22, and the insertion end 21 can move relative to the insertion cavity 11. As the insertion end 21 disengages from the insertion cavity 11, under the action of the driving elastic element 223, the driving rod 224 moves upward and returns to its initial position, i.e., the end of the driving rod 224 is exposed outside the insertion end 21, releasing the restriction of the driving rod 224 on the locking member 102. When the first push rod 31 drives the locking groove 315 to move to a position corresponding to the locking member 102, under the elastic force of the locking member 102, the locking member 102 is locked into the locking groove 315, causing the first push rod 31 to continuously compress the push rod elastic element 33. When the insertion end 21 completely disengages from the insertion cavity 11, it returns to the state where the tow hook 2 is separated from the insertion seat 1.

[0052] This utility model also provides a car including a trailer hitch as described in any of the above claims.

[0053] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalent elements of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0054] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A lock, characterized by: The device includes a mounting sleeve (41), a lock sleeve (42), and a lock cylinder (43). The mounting sleeve (41) has a mounting chamber (411) open at one end. The lock sleeve (42) is installed in the mounting chamber (411). The lock sleeve (42) has a mounting channel (421) open at both ends. The lock cylinder (43) is installed in the mounting channel (421). The lock sleeve (42) has a locking hole (413). The lock cylinder (43) has a locking protrusion (84) corresponding to the locking hole (413). A locking elastic element (44) is provided between the lock cylinder (43) and the inner bottom wall of the mounting chamber (411). In the locked state, the locking protrusion (84) is engaged in the locking hole (413) and the locking elastic element (44) is compressed by the lock cylinder (43) along the first direction. In the unlocked state, the locking protrusion (84) disengages from the locking hole (413) and the locking elastic element (44) ejects the lock cylinder (43) along the second direction. The first direction and the second direction are opposite.

2. The lock of claim 1, wherein: The lock cylinder (43) extends into the mounting channel (421) and is connected to a paddle assembly. The locking protrusion (84) protrudes from the paddle assembly. The lock cylinder (43) is rotatably connected to the mounting channel (421). The lock cylinder (43) rotates to drive the locking protrusion (84) to disengage from the locking hole (413).

3. The lock of claim 2, wherein: The paddle assembly includes a rotary paddle (7) and a locking paddle (8). The rotary paddle (7) is connected to the lock cylinder (43). A rotary lever (71) is protruding from the rotary paddle (7). The rotary lever (71) extends along the first direction and deviates from the central axis of the lock cylinder (43). A locking protrusion (84) is formed on the locking paddle (8). A locking plate slot (81) corresponding to the rotary lever (71) is opened on the locking paddle (8). The rotary lever (71) is inserted into the locking plate slot (81). The lock cylinder (43) is used to drive the rotary lever (71) to rotate around the central axis of the lock cylinder (43), thereby causing the rotary lever (71) to slide in the locking plate slot (81) to drive the locking protrusion (84) to disengage from the locking hole (413).

4. The lock of claim 3, wherein: The rotary lever (7) has a locking hole, which includes a vertical edge and a curved edge connected to each other. The curved edge is a non-circular closed curve. The end of the lock cylinder (43) is adapted to the locking hole to drive the rotary lever (7) to rotate.

5. The lock of claim 3, wherein: The locking lever (8) has a receiving groove (82), and a lever elastic element (83) is provided between the receiving groove (82) and the inner peripheral wall of the lock sleeve (42). In the locked state, the lever elastic element (83) drives the locking protrusion (84) to engage in the locking hole (413). In the unlocked state, the locking protrusion (84) disengages from the locking hole (413) and the lever elastic element (83) is compressed.

6. The lock according to claim 3, characterized in that: A locking element (9) is provided between the locking lever (8) and the inner bottom wall of the mounting chamber (411). The locking element (9) includes a plug rod (91) and a top block (92). One end of the plug rod (91) is connected to the top block (92), and the other end extends to the outside of the mounting sleeve (41). The locking elastic element (44) is provided between the top block (92) and the locking sleeve (42).

7. The lock of claim 6, wherein: The top block (92) has a sliding groove (921) and the locking paddle (8) is movably accommodated in the sliding groove (921).

8. The lock of claim 7, wherein: The bottom of the slide (921) is provided with an arc-shaped groove (922), the paddle elastic element (83) is a spring, and the arc-shaped groove (922) is used to accommodate the paddle elastic element (83).

9. The lock of claim 1, wherein: The lock sleeve (42) has a strip groove (422) which allows the locking protrusion (84) to pass through and enter the locking hole (413).

10. A trailer hitch characterized by: Including the lock as described in any one of claims 1-9.

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