Mechanical lock

Abstract

The utility model provides a mechanical lock which comprises a lock body, a connecting piece, a lock head and a lock cylinder, the lock head is connected to one end of the connecting piece, the connecting piece is further connected with a fixing piece, the fixing piece is fixed on the lock body, the lock head is provided with a lock groove, a transmission piece matched with the lock cylinder in a transmission mode is arranged in the lock body, and the transmission piece is connected with at least one clamping head in a rotating mode. The clamping head is provided with a clamping part which can be clamped into a lock groove of the lock head, a guide piece is further arranged in the lock body, a guide structure which pushes the clamping head to rotate when the clamping head rotates along with the transmission piece is arranged on the guide piece, and the clamping head is connected with an elastic piece which drives the clamping part of the clamping head to be separated from the lock groove after the lock cylinder is unlocked. The transmission piece is driven to rotate to drive the clamping head to rotate, the guiding piece is matched with the elastic piece to enable the clamping head to rotate along with rotation of the transmission piece, and therefore the clamping portion of the clamping head can be clamped into the lock groove of the lock head, compared with a traditional lock, axial reserved sliding space is not needed, the axial length is shortened, and cost is lower.

Description

Technical Field

[0001] The utility model belongs to the technical field of locks, and specifically relates to a mechanical lock for a chain lock or a steel cable lock. Background Art

[0002] At present, chain locks or steel cable locks are mainly used as vehicle locks, which can lock the vehicle wheels or lock the entire vehicle to a tree, a fence or other fixed objects. The locking structure between the steel cable or chain and the lock body of the existing such locks is relatively complex. For example, a chain lock disclosed in the application publication number CN110318600A. After the key is inserted into the keyhole and rotated forward and backward, the lock core rotates forward and backward synchronously. The sliding sleeve can slide back and forth along the axial direction of the lock body through the cooperation of the spiral groove and the transmission column, driving the pressing piece to enter and exit the locking groove. When the pressing piece slides into the locking groove and squeezes the locking column, part of the locking column is exposed and clamped into the arc groove, so as to realize the locking of the lock head. When the pressing piece slides out of the arc groove, the pressing piece does not contact the locking column, and the lock head can be pulled out of the locking cavity to realize the unlocking of the lock head. It can be seen that it has many parts and a complex structure. A space for the sliding sleeve to slide needs to be reserved in the lock body, which makes the length of the lock longer. Then the part size needs to be further lengthened, more materials are used, and the cost is higher. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is how to design a mechanical lock with a simple structure.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A mechanical lock includes a lock body, a connecting piece, and a lock head. A lock core is provided in the lock body. The lock head is connected to one end of the connecting piece. A fixing piece is also connected to the connecting piece, and the fixing piece is fixed on the lock body. A lock groove is provided on the lock head. A transmission piece that is in transmission cooperation with the lock core is provided in the lock body. At least one clamping head is rotatably connected to the transmission piece. The clamping head has a clamping portion that can be clamped into the lock groove of the lock head. A guiding piece is also provided in the lock body. A guiding structure for pushing the clamping head to rotate when the clamping head rotates with the transmission piece is provided on the guiding piece. An elastic piece that drives the clamping portion of the clamping head to disengage from the lock groove after the lock core is unlocked is connected to the clamping head.

[0006] Preferably, the clamping head is movably connected to the transmission piece through a pin shaft.

[0007] Preferably, the pin shaft is integrally connected to the clamping head or is fixedly inserted into the clamping head in a split manner. A clamping groove for the end of the pin shaft to be clamped in from the side is provided on the side wall of the transmission piece.

[0008] Preferably, the elastic member is a spring. The chuck is provided with an abutting portion extending towards the axis position of the transmission member. An installation groove is provided at the position corresponding to the transmission member and the abutting portion. The spring is embedded in the installation groove. One end of the spring abuts against the bottom of the installation groove, and the other end abuts against the abutting portion of the chuck to apply a pushing force to the chuck for a long time to make the engaging portion disengage from the locking groove.

[0009] Preferably, the guiding structure is a guiding surface, which is the inner wall of a through groove provided in the guiding member. The guiding surface is an inclined surface or a curved surface. The chuck extends into the through groove, and the chuck is always kept in close contact with the inner wall of the guiding member under the action of the elastic member.

[0010] Preferably, there are two chucks, which are symmetrically arranged.

[0011] Preferably, the connecting member is a chain or a steel cable.

[0012] Preferably, the fixing member is connected to the middle position of the connecting member.

[0013] Preferably, the lock body further includes a housing, a core sleeve and a collar. The core sleeve is movably sleeved outside the lock core, the collar is sleeved outside the core sleeve, the housing is sleeved outside the collar. The fixing member is provided with a plug, and the plug is provided with an annular groove. The core sleeve is provided with a jack for the plug to be inserted. A long groove is provided on the collar outside the core sleeve. One end of the long groove is provided with a through groove for the plug to be inserted. The width of other parts of the long groove is smaller than the diameter of the plug and larger than the diameter of the annular groove part so that the collar can be stuck at the annular groove of the plug.

[0014] Preferably, the housing and the collar, and the collar and the core sleeve are fixed by pins.

[0015] The beneficial effects of the present utility model are as follows: By driving the transmission member to rotate to drive the chuck to rotate, and through the cooperation of the guiding member and the elastic member, the chuck can rotate when rotating with the transmission member, so that the engaging portion of the chuck can be engaged into the locking groove of the lock head. The structure of the present utility model is simple. Compared with the traditional lock, there is no need to reserve an axial sliding space, so that the axial length is shortened and the cost is lower. Description of the Drawings

[0016] Figure 1 is the schematic structural diagram of the whole of the present utility model;

[0017] Figure 2 is the schematic structural diagram of the present utility model with the housing removed;

[0018] Figure 3 is the sectional view of the present utility model;

[0019] Figure 4 is the schematic structural diagram of the lock core;

[0020] Figure 5Schematic diagram of the core sleeve structure;

[0021] Figure 6 Schematic diagram of the ferrule structure;

[0022] Figure 7 Schematic diagram of the chuck structure;

[0023] Figure 8 Schematic diagram of the structure of the guide member;

[0024] Figure 9 Schematic diagram of the structure of the transmission member;

[0025] Figure 10 Schematic diagram of the structure of the transmission member from another perspective. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment

[0028] Please refer to Figures 1 - 10, as shown in the figure, there is a chain lock, which is a mechanical lock. The chain lock includes a lock body 100, a connecting member, and a lock head 200. In this embodiment, the connecting member is a chain, and it can also be a steel cable, etc. There is a lock core 110 inside the lock body 100. The lock head 200 is connected to one end of the connecting member, and a fixing member 300 is also connected to the connecting member. The fixing member 300 is fixed on the lock body 100. The fixing member 300 is connected to the middle position of the connecting member, so there are multiple ways to lock the vehicle. For example, one way to lock the vehicle: the chain on one side of the fixing member 300 bypasses the vehicle, and the chain on the other side of the fixing member 300 bypasses a tree and connects to the position of the lock head 200; Another way to lock the vehicle: the side of the fixing member 300 where the lock head 200 is provided directly bypasses the tree and the vehicle, and locks the two together. There is a lock groove 201 on the lock head 200. The lock groove 201 is an annular groove. There is a transmission member 130 in the lock body 100 that is in transmission cooperation with the lock core 110. A transmission hole groove 131 that is in transmission cooperation with one end of the lock core 110 is provided at the center of the transmission member 130. A transmission shaft 111 that matches the shape of the hole groove is provided at the end of the lock core 110 away from the key insertion end. The transmission shaft 111 and the hole groove are non-circular, and square or D-shaped is optimal. At least one catch 140 is rotatably connected to the transmission member 130. In this embodiment, there are two catches 140, and they are symmetrically arranged. The catch 140 is movably connected to the transmission member 130 through a pin shaft 141. The catch 140 has a clamping portion 142 that can be inserted into the lock groove 201 of the lock head 200. A guiding member 150 is also provided in the lock body 100. The guiding member 150 is provided with a guiding structure that pushes the catch 140 to rotate when the catch 140 rotates with the transmission member 130. An elastic member 120 is connected to the catch 140 to drive the clamping portion 142 of the catch 140 to disengage from the lock groove 201 after the lock core 110 is unlocked. In this embodiment, the elastic member 120 is a spring. The spring can be the pushing spring in this embodiment, or a pulling spring with a reverse acting force. As long as the position of the elastic member 120 is changed, the acting force of the elastic member 120 can also change correspondingly. As long as it can achieve the elastic force applied by the clamping portion 142 of the catch 140 in the direction of disengaging from the lock groove 201 in this application, it should be within the protection scope of this application. In this embodiment, the plane where the rotation direction of the catch 140 is located is perpendicular to the plane where the rotation direction of the transmission member 130 is located.

[0029] In this embodiment, the pin shaft 141 on the chuck 140 is integrally connected to the chuck 140. It can also be other technical solutions equivalent to this embodiment. For example, the invention object of this application can also be achieved by fixing and inserting the pin shaft 141 into the chuck 140 in a split manner. However, this means is substantially the same as this application. A slot 132 for the end of the pin shaft 141 to be inserted from the side is provided on the side wall of the transmission member 130. The side wall of the slot 132 is open, which facilitates the insertion of the pin shaft 141 of the chuck 140. After the chuck 140 is installed, the transmission member 130 is installed on the inner wall of the lock body 100, and then the outer shell 101 of the lock body 100 outside the transmission member 130 is closely arranged against the transmission member 130, so that the opening of the slot 132 is closed. Therefore, the pin shaft 141 of the transmission member 130 will not slide out of the slot 132. The slot 132 is also integrally formed with the transmission member 130 and does not require additional processing, further reducing the processing procedures.

[0030] In this embodiment, the chuck 140 is provided with an abutting portion 143 extending towards the axis position of the transmission member 130. An installation groove 133 is provided at the corresponding position of the transmission member 130 and the abutting portion 143. A spring is embedded in the installation groove 133. One end of the spring abuts against the bottom of the installation groove 133, and the other end abuts against the abutting portion 143 of the chuck 140 to continuously apply an elastic force to push the chuck 140 to separate the clamping portion 142 from the locking groove 201.

[0031] The guiding structure is a guiding surface 151, which is the inner wall of a through groove 1032 provided in the guiding member 150. The guiding surface 151 is an inclined surface or a curved surface. The chuck 140 extends into the through groove 1032, and due to the action of the elastic member 120, the chuck 140 is always kept in close contact with the inner wall of the guiding member 150. Since there are two chucks 140, there are also two guiding surfaces 151 in this embodiment, which are also symmetrically arranged.

[0032] In this embodiment, the lock body 100 further includes a housing 101, a core sleeve 102, and a collar 103. The core sleeve 102 is movably sleeved outside the lock core 110, the collar 103 is sleeved outside the core sleeve 102, and the housing 101 is sleeved outside the collar 103. The fixing member 300 is provided with a plug, and the plug is provided with an annular groove 121. The core sleeve 102 is provided with a jack 1021 for the plug to be inserted. A long groove 1031 is provided on the collar 103 outside the core sleeve 102. One end of the long groove 1031 is provided with a through groove 1032 for the plug to be inserted. The width of other parts of the long groove 1031 is smaller than the diameter of the plug and larger than the diameter of the annular groove 121 part so that the collar 103 can be stuck at the annular groove 121 of the plug. The housing 101 and the collar 103, and the collar 103 and the core sleeve 102 are fixed by a pin shaft 141. In this embodiment, when installing the fixing member 300, the lock core 110, the core sleeve 102, the collar 103, and the housing 101 are sleeved one by one. First, the jack of the core sleeve 102, the through groove 1032 of the long groove 1031 of the collar 103, and the jack of the housing 101 are concentrically aligned. Then, the fixing member 300 is inserted. Next, the collar 103 is rotated so that one end of the long groove 1031 of the collar 103 away from the through groove 1032 can limit the fixing member 300. Finally, the core sleeve 102, the collar 103, and the housing 101 are fixed by a pin shaft or fixed together by other means. In this embodiment, the guiding member is snap-connected to the core sleeve 102 to form a relative fixation, or the guiding member can also be fixed to the housing 101.

Claims

1. A mechanical lock, comprising a lock body, a connecting piece, and a lock head, wherein the lock body has a lock core, the lock head is connected to one end of the connecting piece, the connecting piece is also connected to a fixing piece, the fixing piece is fixed to the lock body, and the lock head has a lock groove, characterized in that: The lock body is provided with a transmission member that cooperates with the lock core. At least one clamping head is rotatably connected to the transmission member. The clamping head has a clamping portion that can be clamped into a lock groove of the lock head. A guide member is also provided in the lock body. The guide member is provided with a guide structure that pushes the clamping head to rotate when the clamping head rotates with the transmission member. The clamping head is connected to an elastic member that drives the clamping portion of the clamping head to disengage from the lock groove after the lock core is unlocked.

2. A mechanical lock according to claim 1, characterized in that: The clamping head and the transmission member are movably connected via a pin shaft.

3. A mechanical lock according to claim 2, characterized in that: The pin shaft is connected to the clamp head in an integral manner, or is fixedly inserted into the clamp head in a split manner, and a side wall of the transmission member is provided with a clamping groove for the end of the pin shaft to be clamped in from the side.

4. A mechanical lock according to claim 1, 2 or 3, characterized in that: The elastic member is a spring, and a contact portion extending toward the axial center position of the transmission member is provided on the clamping head. A mounting groove is provided at the corresponding position of the transmission member and the contact portion. The spring is embedded in the mounting groove. One end of the spring abuts against the bottom of the mounting groove, and the other end abuts against the abutting portion of the clamping head to apply elastic force for a long time to push the clamping head so that the clamping portion is separated from the lock groove.

5. A mechanical lock according to claim 1, 2 or 3, characterized in that: The guide structure is a guide surface, which is the inner wall of a through slot set in the guide member. The guide surface is an inclined surface or a curved surface. The clamp extends into the through slot and is always kept in close contact with the inner wall of the guide member through the action of the elastic member.

6. A mechanical lock according to claim 1, characterized in that: There are two clamping heads, which are symmetrically arranged.

7. A mechanical lock according to claim 1, characterized in that: The connecting piece is a chain or a steel cable.

8. A mechanical lock according to claim 1, characterized in that: The fixing member is connected to the middle position of the connecting member.

9. A mechanical lock according to claim 1, characterized in that: The lock body also includes an outer shell, a core sleeve and a clamping sleeve. The core sleeve is movably sleeved on the outside of the lock core, the clamping sleeve is sleeved on the outside of the core sleeve, and the outer shell is sleeved on the outside of the clamping sleeve. The fixing part is provided with a plug, and the plug is provided with an annular groove. The core sleeve is provided with a jack for inserting the plug, and a long groove is provided on the clamping sleeve outside the core sleeve. A through groove is provided at one end of the long groove for inserting the plug, and the width of the other part of the long groove is smaller than the diameter of the plug but larger than the diameter of the annular groove so that the clamping sleeve can be stuck in the annular groove of the plug.

10. A mechanical lock according to claim 9, characterized in that: The shell and the clamping sleeve, and the clamping sleeve and the core sleeve are fixed by pins.

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