Connecting rod transmission mechanism of connecting rod lock

Abstract

The utility model relates to a connecting rod transmission mechanism of a connecting rod lock, which comprises a base, a lock driving gear arranged on the base and a transmission pull rod in sliding fit with the base, tooth holes are distributed on the transmission pull rod along the sliding direction, and the transmission pull rod is in meshing transmission with the lock driving gear through the tooth holes, so that the lock driving gear drives the transmission pull rod to slide. The two ends of the transmission pull rod in the length direction are correspondingly matched with connecting rod assemblies, each connecting rod assembly comprises a transmission gear arranged on the base in a positioning and rotating mode and a connecting rod arranged on the base in a sliding fit mode, the transmission gears are in meshed transmission with tooth hole sections of the connecting rods, and the transmission pull rod and the transmission gears are in meshed transmission in a clutch mode. Along with the reciprocating sliding of the transmission pull rod, the two ends of the transmission pull rod are alternately in meshing transmission with the transmission gears of the two connecting rod assemblies, and the two ends of the transmission pull rod correspondingly drive the locking positions of the corresponding transmission gears in critical meshing. And two doors can be controlled by one lock.

Description

Technical Field

[0001] The utility model relates to a lock, more specifically to a connecting rod transmission mechanism of the lock. Background Art

[0002] The structure of the connecting rod transmission mechanism of the existing connecting rod lock includes a lock driving gear, which is connected to the lock handle. The rotation of the handle drives the lock driving gear to rotate. The lock driving gear is meshed with two connecting rods at the same time. The rotation of the lock driving gear realizes the synchronous sliding of the two connecting rods. Under the design of the connecting rod transmission mechanism, the lock can only implement the opening and closing lock control of a single door panel. For some medium and large electrical cabinets, it is necessary to use a single lock to control two adjacent door panels to facilitate control and reduce costs. Therefore, the existing connecting rod transmission mechanism cannot meet the above requirements. Summary of the invention

[0003] The purpose of the utility model invention: to overcome the defects of the prior art, the utility model provides a connecting rod transmission mechanism which can realize the connecting rod lock to control the opening and closing of two doors, and has the advantages of simple structure and stable and reliable operation.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A connecting rod transmission mechanism of a connecting rod lock includes a base and a lock driving gear arranged on the base, and is characterized in that it also includes a transmission pull rod slidably fitted on the base, the transmission pull rod has tooth holes distributed along the sliding direction, the transmission pull rod is meshed with the lock driving gear through the tooth holes for transmission, so that the lock driving gear drives the transmission pull rod to slide, and both ends of the transmission pull rod in the length direction are respectively matched with a connecting rod assembly, the connecting rod assembly includes a transmission gear positioned and rotatably arranged on the base and a connecting rod slidably fitted on the base, the transmission gear is meshed with the tooth hole section of the connecting rod for transmission, the transmission pull rod is meshed with the transmission gear in a disengageable manner, and as the transmission pull rod slides back and forth, the two ends of the transmission pull rod are alternately meshed with the transmission gears of the two groups of connecting rod assemblies for transmission, the transmission pull rod has a fully locked position in which both ends correspond to the critical meshing driving corresponding transmission gears, and a single unlocking position connected to one of the transmission gears.

[0006] Preferably, the transmission gear is provided with an avoidance special-shaped tooth with the tooth top cut off. After the tooth top of the avoidance special-shaped tooth is cut off, the end of the transmission pull rod can pass over the avoidance special-shaped tooth, thereby achieving a push-fitting between the end of the transmission pull rod and the meshing tooth adjacent to the avoidance special-shaped tooth on the transmission gear.

[0007] Preferably, the transmission gear is provided with a limiting special-shaped tooth with the tooth top cut off, and the tooth top of the limiting special-shaped tooth is cut off to form a limiting plane cut surface. When the connecting rod assembly is in the state corresponding to the locked door panel, the surface connected to the end of the tooth hole section on the connecting rod is in contact with the limiting plane cut surface for limiting cooperation.

[0008] Preferably, the transmission gear is provided with four special-shaped teeth, and the four special-shaped teeth constitute two groups of special-shaped tooth groups which are symmetrically arranged. There is a meshing tooth with complete tooth shape between two special-shaped teeth in the special-shaped tooth group. The two special-shaped teeth in the special-shaped tooth group are symmetrically arranged on both sides of the meshing tooth with complete tooth shape. One of the special-shaped teeth in the two groups of special-shaped tooth groups respectively corresponds to an avoidance special-shaped tooth and a limiting special-shaped tooth.

[0009] Preferably, the base includes a transmission assembly box and a connecting rod assembly box, the transmission pull rod and the lock drive gear are integrated and assembled in the transmission assembly box, the connecting rod and the transmission gear are assembled in the connecting rod assembly box, each connecting rod assembly is configured with a connecting rod assembly box, and a sliding channel for inserting the transmission pull rod is provided on the connecting rod assembly box.

[0010] Preferably, the transmission assembly box and the connecting rod assembly box are of the same shape and structure to achieve universal use, and corner notches are provided at both end corners of one side of the transmission assembly box and the connecting rod assembly box in the width direction.

[0011] By adopting the above technical solution, the connecting rod transmission mechanism realizes that a single control end controls two groups of connecting rod assemblies respectively, and the two groups of connecting rod assemblies can respectively lock and unlock the door panels, thereby realizing that one lock controls two doors; and it has the advantages of stable and reliable transmission.

[0012] The utility model is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the connecting rod transmission mechanism of the connecting rod lock of the utility model;

[0014] Figure 2 This is an exploded view of the connecting rod transmission mechanism of the connecting rod lock of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the transmission gear of the utility model;

[0016] Figure 4 This is a locked state diagram of the connecting rod lock of the utility model;

[0017] Figure 5 This is a diagram showing the unlocked state of the left door leaf of the connecting rod lock of the utility model;

[0018] Figure 6 This is a diagram of the unlocked state of the right door leaf of the connecting rod lock of the utility model. DETAILED DESCRIPTION

[0019] See attached Figures 1 to 6The utility model discloses a connecting rod lock, which is equipped with a connecting rod transmission mechanism. The connecting rod transmission mechanism includes a base and a lock driving gear 31. The lock driving gear 31 is installed on the handle 2 of the connecting rod lock through a steel bolt. The handle 2 is rotatably installed on the lock shell 1. The lock driving gear 31 is driven to rotate by the handle 2. The connecting rod transmission mechanism also includes a transmission rod 32 that is slidably matched on the base 1. The transmission rod 32 is distributed with tooth holes 321 along the sliding direction. The transmission rod 32 is meshed with the lock driving gear 31 through the tooth holes 321 to realize that the lock driving gear 31 drives the transmission rod 32 to slide. The length of the transmission rod 32 There is a connecting rod assembly corresponding to both ends of the direction, and each group of connecting rod assemblies controls a door panel. The connecting rod assembly includes a transmission gear 33 that is positioned and rotatably configured on the base 1 and a connecting rod 34 that is slidably matched on the base 1. The transmission gear 33 is meshed with the tooth hole section 341 of the connecting rod 34 for transmission, and the transmission pull rod 32 is meshed with the transmission gear 33 for transmission that can be disengaged. As the transmission pull rod 32 slides back and forth, the two ends of the transmission pull rod 32 are alternately meshed with the transmission gears 33 of the two groups of connecting rod assemblies for transmission. The transmission pull rod 32 has two ends that correspond to the locking position (such as the critical meshing driving the corresponding transmission gear 33) Figure 4 ), and a single unlocked position connected to one of the transmission gears (as Figure 5 , 6 As shown). When the lock is in the locked state, both ends of the transmission rod 32 are separated from the transmission gears 33 of the two sets of connecting rod assemblies, but the end of the transmission rod 32 is in critical meshing to drive the corresponding transmission gear 33. When the lock is locked, the lock drive gear 31 and the transmission rod 32 are meshed, and the transmission rod 32 is also locked. The transmission rod 32 can stop the transmission gear 33, thereby locking the two sets of connecting rod assemblies; when the handle is rotated in one direction in the locked position, the power transmission of the lock drive gear 31-transmission rod 32-transmission gear 33-connecting rod 34 is completed to unlock the corresponding door leaf, while the other door leaf does not move; the operating handle returns to the locked position and rotates in the other direction to unlock the other door leaf; one lock controls the opening and closing of two door panels; and relying on the transmission coordination of gears and racks, it has the advantages of simple structure, stable and reliable transmission and reliable operation.

[0020] In order to further ensure the stability and reliability of the lock transmission, the corresponding meshing teeth on the transmission gear adopt a special-shaped tooth design, as follows:

[0021] In order to further make the meshing and disengagement of the transmission rod 32 and the transmission gear 33 more stable and reliable, the transmission gear 33 is provided with a avoidance special-shaped tooth 331-1 with the tooth top cut off. After the tooth top of the avoidance special-shaped tooth 331-1 is cut off, the end of the transmission rod 32 can pass over the avoidance special-shaped tooth 331-1, so that the end of the transmission rod 32 and the meshing tooth 332 adjacent to the avoidance special-shaped tooth 331-1 on the transmission gear 33 can be pushed and matched. The design of the avoidance special-shaped tooth makes the transmission rod 32 and the transmission gear 33 more compactly matched, so that the transmission rod 32 can mesh with or disengage from the transmission gear 33 more stably and reliably, and at the same time, when the transmission rod 32 is in the locked position, the transmission rod 32 can lock the transmission gear 33 more reliably.

[0022] In addition, the transmission gear 33 is provided with a position-limiting special-shaped tooth 331-2 with the top of the tooth cut off, and the top of the tooth of the position-limiting special-shaped tooth 331-2 is cut off to form a position-limiting plane cut surface 331-21. When the connecting rod assembly corresponds to the state of locking the door panel, the surface 342 connected to the end of the tooth hole section 341 on the connecting rod 34 and the position-limiting plane cut surface 331-21 are in abutment and position-limiting cooperation. When the connecting rod 34 is in a position to lock the door leaf, the meshing teeth on the transmission gear and the surface connected to the end of the tooth hole section on the connecting rod 34 are stopped and limited to prevent the connecting rod 34 from continuing to slide. The position-limiting plane cut surface and the surface connected to the end of the tooth hole section on the connecting rod 34 are in abutment to achieve surface contact, thereby protecting the transmission gear and the connecting rod 34.

[0023] When the transmission gear has a special-shaped tooth design, the corresponding special-shaped teeth need to be assembled until they are corresponding, that is, the transmission gear needs to identify the installation direction. In order to make the installation simpler and the processing more convenient, the following design is adopted: the transmission gear 33 is provided with four special-shaped teeth 331, and the four special-shaped teeth 331 constitute two groups of special-shaped teeth that are symmetrically arranged. There is a meshing tooth 332 with a complete tooth shape between the two special-shaped teeth 331 in the special-shaped tooth group. The two special-shaped teeth 331 in the special-shaped tooth group are symmetrically arranged on both sides of the meshing tooth 332 with a complete tooth shape. One of the special-shaped teeth in the two groups of special-shaped teeth respectively constitutes the avoidance special-shaped tooth 331-1 and the limit special-shaped tooth 331-2. Figure 4 As shown, four special-shaped teeth 331 of corresponding symmetrical design are designed on the transmission gear. During processing, the four special-shaped teeth 331 have no functional restrictions and can be used as avoidance special-shaped teeth and limit special-shaped teeth. After the transmission gear is assembled, two special-shaped teeth 331 are vacant, and the special-shaped teeth 331 in the corresponding positions cooperate with the connecting rod 34 and the transmission pull rod 32 to achieve the corresponding functions, that is, as avoidance special-shaped teeth and limit special-shaped teeth; in this way, it is only necessary to assemble the special-shaped tooth group to the corresponding positions of the transmission pull rod 32 and the connecting rod 34, and at the same time, the transmission gears in the two groups of connecting rod assemblies can be used interchangeably.

[0024] The connecting rod transmission mechanism adopts modular design to facilitate assembly and processing and reduce the cost of the lock; specifically, the connecting rod transmission mechanism includes a transmission assembly box 35 and a connecting rod assembly box 36, the transmission rod 32 and the lock driving gear 31 are integrated and assembled in the transmission assembly box 35, the connecting rod 34 and the transmission gear 33 are assembled in the connecting rod assembly box 36, each group of connecting rod components is equipped with a connecting rod assembly box 36, and the connecting rod assembly box 36 is provided with a sliding channel 361 for inserting the transmission rod 32. The connecting rod transmission mechanism is associated with the base through the transmission assembly box and the connecting rod assembly box. Since the transmission rod is in a critical meshing state with the transmission gear of the connecting rod assembly when the lock is locked, when assembling, it is only necessary to insert the transmission rod into the sliding channel, and its assembly and disassembly operations are simple and convenient.

[0025] In order to further reduce the production cost of the lock, the transmission assembly box 35 and the connecting rod assembly box 36 are designed to be of the same shape and structure, so that they can be used interchangeably. A missing corner groove a is provided at both ends of one side of the transmission assembly box 35 and the connecting rod assembly box 36 in the width direction. The design of the missing corner groove a realizes position avoidance during assembly. Figure 1 As shown, a compact arrangement is achieved.

[0026] The lock of the present invention can realize one lock to control two doors (such as Figures 5 and 6 ); To facilitate the description of the working process of the lock, the two connecting rod assemblies are defined as an upper connecting rod assembly and a lower connecting rod assembly according to the positions in the accompanying drawings, but this definition is only used for distinction in expression and does not limit the scope of protection of the invention; Figure 5 As shown, the lock is in the locked state, the handle and the transmission rod are in the locked position, the two ends of the transmission rod and the transmission gears in the two sets of connecting rod assemblies are in a critical state, and the transmission rod realizes a stop lock on the transmission gear; Figure 6 As shown, when the left door is opened, the handle rotates counterclockwise, the lock drive gear 31 drives the transmission pull rod 32 to slide upward, the transmission pull rod 32 engages with the transmission gear of the upper connecting rod assembly for transmission, the transmission pull rod 32 drives the transmission gear to rotate, and the transmission gear drives the connecting rod of the upper connecting rod assembly to move and complete the unlocking of the left door leaf. During this process, the right door leaf does not move; when the right door leaf is unlocked again, the lock returns to the state as shown in the figure. Figure 5 The locked state shown; Figure 6 As shown, when the door is opened on the right side, the handle rotates clockwise, the lock drive gear 31 drives the transmission rod 32 to slide downward, the transmission rod 32 engages with the transmission gear of the lower connecting rod assembly for transmission, the transmission rod 32 drives the transmission gear to rotate, and the transmission gear drives the connecting rod of the lower connecting rod assembly to move and complete the unlocking of the right door leaf. During this process, the left door leaf does not move.

[0027] The dual-control lock of the present invention has the advantages of stable and reliable transmission, convenient assembly and disassembly operation and convenient subsequent maintenance.

Claims

1. A connecting rod transmission mechanism of a connecting rod lock, comprising a base and a lock driving gear arranged on the base, characterized in that: The transmission rod is also included in the transmission pull rod which is slidably engaged on the base. The transmission pull rod has tooth holes distributed along the sliding direction. The transmission pull rod is meshed with the lock driving gear through the tooth holes for transmission, so that the lock driving gear drives the transmission pull rod to slide. Both ends of the transmission pull rod in the length direction are respectively matched with a connecting rod assembly. The connecting rod assembly includes a transmission gear which is positioned and rotatably configured on the base and a connecting rod which is slidably engaged on the base. The transmission gear is meshed with the tooth hole section of the connecting rod for transmission. The transmission pull rod is meshed with the transmission gear in a disengageable manner. As the transmission pull rod slides back and forth, the two ends of the transmission pull rod are alternately meshed with the transmission gears of the two groups of connecting rod assemblies for transmission. The transmission pull rod has a fully locked position in which both ends correspond to the critical meshing driving the corresponding transmission gear, and a single unlocking position connected to one of the transmission gears.

2. The connecting rod transmission mechanism of the connecting rod lock according to claim 1, characterized in that: The transmission gear is provided with an avoidance special-shaped tooth with the tooth top cut off. After the tooth top of the avoidance special-shaped tooth is cut off, the end of the transmission pull rod can pass over the avoidance special-shaped tooth, thereby achieving a push-fitting between the end of the transmission pull rod and the meshing tooth adjacent to the avoidance special-shaped tooth on the transmission gear.

3. The connecting rod transmission mechanism of the connecting rod lock according to claim 1, characterized in that: The transmission gear is provided with a limiting special-shaped tooth with the tooth top cut off, and the tooth top of the limiting special-shaped tooth is cut off to form a limiting plane cut surface. When the connecting rod assembly corresponds to the state of locking the door panel, the surface connected to the end of the tooth hole section on the connecting rod is in contact with the limiting plane cut surface for limiting cooperation.

4. The connecting rod transmission mechanism of the connecting rod lock according to claim 2, characterized in that: The transmission gear is provided with a limiting special-shaped tooth with the top of the tooth cut off, and the top of the tooth of the limiting special-shaped tooth is cut off to form a limiting plane cut surface. When the connecting rod assembly corresponds to the state of the locked door panel, the surface connected to the end of the tooth hole section on the connecting rod is in abutment and limited cooperation with the limiting plane cut surface. The transmission gear is provided with four special-shaped teeth, and the four special-shaped teeth constitute two groups of special-shaped tooth groups that are symmetrically arranged. There is a meshing tooth with complete tooth shape between two special-shaped teeth in the special-shaped tooth group. The two special-shaped teeth in the special-shaped tooth group are symmetrically arranged on both sides of the meshing tooth with complete tooth shape. One of the special-shaped teeth in the two groups of special-shaped tooth groups corresponds to an avoidance special-shaped tooth and a limiting special-shaped tooth, respectively.

5. The connecting rod transmission mechanism of the connecting rod lock according to claim 1, 2, 3 or 4, characterized in that: The base includes a transmission assembly box and a connecting rod assembly box. The transmission pull rod and the lock drive gear are integrated and assembled in the transmission assembly box. The connecting rod and the transmission gear are assembled in the connecting rod assembly box. Each connecting rod assembly is equipped with a connecting rod assembly box. A sliding channel for inserting the transmission pull rod is provided on the connecting rod assembly box.

6. The connecting rod transmission mechanism of the connecting rod lock according to claim 5, characterized in that: The transmission assembly box and the connecting rod assembly box have the same shape and structure to achieve universal use. Corner-cut grooves are provided at both end corners of one side of the transmission assembly box and the connecting rod assembly box in the width direction.

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