Junction box threading nut locking device and assembly production line

Abstract

The utility model relates to the technical field of motor production and manufacturing, in particular to a junction box threading nut locking device and an assembly production line, the locking device comprises a device body, the device body comprises a base, a motor, a torque limiter, a first working head, a slide rail and a first base, and the base provides a mounting basis for each device; the motor is mounted on the base; the torque limiter is arranged on a rotating shaft of the motor; the first working head is connected with the torque limiter and is provided with an opening convenient for sleeving a threading nut; the sliding rail is arranged on the base, and the length direction of the sliding rail is parallel to a rotating shaft of the motor. The first base reciprocates on the sliding rail after being connected with the sliding rail; the torque limiter is located between the motor and the first base. The assembly line comprises a device body, a material conveying assembly and a material pushing assembly. The device is stable in output, and the torsion is adjusted as required; the safety is high; the operation stability is good, and the batch operation efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of motor production and manufacturing, and in particular to a terminal box threading nut locking device and an assembly production line. Background Art

[0002] Some motors on the market are generally equipped with independent junction boxes on the casing to facilitate the connection of power cables and control lines. This type of junction box is equipped with a wire nut, also known as a wire connector, at the position where the external line is introduced. This structural component is generally manually installed and locked on the wire opening (screw hole) of the junction box. The external cable is introduced into the junction box after passing through the wire nut and connected to the terminal in the built-in box. The wire nut not only ensures that the junction box is dustproof and waterproof, but also has a certain anti-seismic effect. The cable will not be constrained by the wire nut, and the vibration effect during the operation of the motor is also reduced. To a certain extent, the loosening of the terminal can be avoided.

[0003] However, the traditional way of installing threading nuts is not only inefficient, but also very easy to cause improper installation due to unskilled operators or improper force. During multiple adjustments and reinstallations, it is easy to cause damage to the thread and cause problems such as thread slippage and loosening, which will also destroy the dust and water resistance in subsequent use. In some applications where the motor is larger, the size of the threading nut will also increase accordingly. At this time, not only the above problems exist, but also the large torque required during the installation process will cause the operator to quickly fatigue, thereby reducing production efficiency. In order to reduce the labor burden of the operator, a torque wrench is often used to assist the operation. The torque wrench can effectively reduce the intensity of the operation and reduce the resulting misoperation, but it is not easy to accurately control the direction of force during operation. There are still problems such as thread slippage caused by the deviation of the direction of force. In addition, the large torque makes the thread in the nut or the terminal box hole more easily damaged. In addition, some products use a spray coating process to form a uniform coating on the surface. If the coating is damaged, the product may not meet the factory or use requirements and cause losses. Since the torque wrench body is large, it is easy for the wrench to hit the junction box or the surface of the nut due to slipping from the nut if it is not operated properly. The surface of the nut may cause hidden dangers in subsequent use (for example, the threads may slip during disassembly). The existence of such risks also makes the method of using a torque wrench to assist the operation no more advantageous than the pure manual installation method. In summary, the existing method has the following disadvantages for the installation of threading nuts:

[0004] 1) Pure manual method: The output is unstable and it is not easy to install it in one go; repeated installation process can easily damage the nuts and screw threads; the output is insufficient and the efficiency is low when dealing with products with larger specifications;

[0005] 2) Torque wrench auxiliary mode: The direction of force output is difficult to control. Forcing the operation when the nut and the screw hole are not fully aligned will cause more serious thread slippage and cause greater damage to the thread of the nut or screw hole. Since the wrench body is heavy, there is a risk of damaging the junction box or the surface of the nut when holding the wrench.

[0006] 3) Low efficiency, difficult to sustain high-intensity operations.

[0007] The current industry lacks products or operating methods that can effectively deal with the above problems. In addition, compared with production lines with increasingly higher automation, traditional operating methods have weaker batch and continuous operation capabilities, which will undoubtedly affect overall production efficiency. Utility Model Content

[0008] The purpose of the utility model is to provide a junction box threading nut locking device and an assembly production line to solve the above technical problems.

[0009] In a first aspect, the utility model provides a wiring nut locking device for a junction box, comprising a device body, through which a wiring nut is screwed into a nut hole of a junction box, wherein the device body comprises:

[0010] A base, the base providing a mounting base for each device;

[0011] A motor, wherein the motor is mounted on the base;

[0012] A torque limiter, the torque limiter is arranged on the rotating shaft of the motor;

[0013] A first working head, the first working head is connected to the torque limiter and rotates with the torque limiter to apply a force to the threading nut to make it screw, so as to help it be screwed into the nut hole of the junction box, the first working head has an opening for inserting the threading nut, and the inner wall of the opening has an inner hexagonal structure matching the outer hexagonal structure of the threading nut;

[0014] A slide rail, the slide rail is arranged on the base, and a length direction of the slide rail is parallel to the rotating shaft of the motor;

[0015] a first base, the first base being connected to the slide rail and reciprocating thereon;

[0016] The torque limiter is located between the motor and the first base.

[0017] The utility model helps to improve the working efficiency by setting the device body, ensures that the threading nut is screwed into place, and is not easy to damage the appearance of the nut or the junction box. During operation, the threading nut is first manually screwed into the nut hole of the junction box, and then the junction box is placed on the first base, the first base is pushed forward to make the first working head sleeve into the threading nut, and the first working head is rotated after starting the motor. During the process, the threading nut is gradually screwed into and tightened in the nut hole. When it is tightened to a certain degree (that is, the torque adjusted by the torque limiter is suitable for the tight fit of the current junction box and the threading nut), the torque limiter slips, and at this time it means that the nut is in place.

[0018] Preferably, the device body comprises:

[0019] A coupling connects the motor and the torque limiter.

[0020] The utility model provides a coupling, which can protect the torque limiter from being damaged by secondary damage when the torque limiter fails. When setting, the rated torque of the coupling is slightly greater than the current working torque of the torque limiter, or the rated torque of the coupling is set to the maximum adjustable torque of the torque limiter.

[0021] Preferably, the device body comprises:

[0022] a second base, the second base being disposed on the base;

[0023] A bearing, wherein the bearing is disposed on the second base;

[0024] A connecting shaft, after passing through the bearing, has one end connected to the torque limiter and the other end connected to the coupling.

[0025] In the case of setting a coupling, the utility model provides a good and stable intermediate connection effect for the coupling and the torque limiter through the connecting shaft, the bearing and the second base to facilitate the structural connection setting.

[0026] Preferably, the device body comprises:

[0027] a third base, the third base being disposed on the base and located between the slide rail and the second base;

[0028] The torque limiter is fixed on the third base.

[0029] Preferably, a push handle is provided on the first base to facilitate manual operation to push the first base toward the torque limiter or to pull the first base away from the working position after the operation is completed.

[0030] In a second aspect, the utility model provides a wiring nut assembly production line for a junction box, comprising:

[0031] The device body;

[0032] A material conveying assembly, the material conveying assembly includes a front conveyor and a rear conveyor, the conveying directions of the two conveyors are perpendicular to the slide rail of the device body, and the slide rail is located between the front conveyor and the rear conveyor;

[0033] A pusher assembly is located at one side of the slide rail and has a second working head for pushing the first base out or pulling it back to the torque limiter.

[0034] When the utility model is configured for an assembly production line, the device body includes at least two first bases. After the plurality of first bases are sequentially transported to the pushing position by the feeding assembly, the pushing assembly pushes them along the slide rail to the assembly station for nut tightening.

[0035] Preferably, the feeding assembly comprises:

[0036] Lifting platform;

[0037] A middle conveyor, the middle conveyor is located between the front conveyor and the rear conveyor, and the middle conveyor is erected on the lifting platform;

[0038] The slide rail comprises:

[0039] A first section of track, the first section of track is located at the middle section of the conveyor and between two sections of conveyor tracks of the middle section of the conveyor;

[0040] A second track section, wherein the second track section is located between the first track section and the first working head.

[0041] The utility model solves the problem of transition at the material pushing station during sequential conveying of a plurality of first bases by arranging a lifting platform and a middle section conveyor, so that the first bases can be connected to the slide rail.

[0042] Preferably, the length of the second track section is greater than the length of the first base.

[0043] It should be noted that the length of the first base refers to its length along the slide rail. By setting the length of the second track to be greater than the length of the first base, the first base can be completely dropped onto the second track during the pushing process, so that it is in a stable sliding state when it finally contacts the first working head, thereby avoiding the situation where the other part of the first base is still on the separated first track when contacting the first working head due to the insufficient length of the second track, thereby preventing it from being accurately aligned and inserted into the opening of the first working head.

[0044] Preferably, the pushing assembly comprises a pushing cylinder, and the second working head is provided at the end of a push rod of the pushing cylinder.

[0045] Preferably, the second working head adopts a suction cup, and the suction cup is connected to a negative pressure generating device.

[0046] In order to facilitate pushing of materials, the utility model can also pull the first base back to the conveying track of the feeding assembly after completing the threading nut locking operation. The second working head can be set as a suction cup. After the suction cup is connected to the negative pressure generating device, the suction cup surface generates negative pressure and then adsorbs the side wall of the first base, so that the first base is pulled back to the conveying path of the feeding assembly when the pushing cylinder is retracted.

[0047] Beneficial effects: Due to the adoption of the above technical solution, the utility model has the following advantages:

[0048] 1) The output is stable, the torque can be adjusted as needed, and it is more adaptable to the working object (here refers to threading nuts of different sizes and corresponding junction boxes);

[0049] 2) High safety. Overload protection is achieved by adjusting the torque, which can effectively avoid the structural damage caused by forced operation when the nut and the screw hole are not aligned in traditional operations;

[0050] 3) Good operation stability and high batch operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A structural schematic diagram of the device body of the utility model;

[0052] Figure 2 This is a three-dimensional view of the device body of the utility model after the base is hidden;

[0053] Figure 3 The utility model is a structural schematic diagram of an assembly production line. DETAILED DESCRIPTION

[0054] In order to make the technical means, creative features, purpose and efficacy of the utility model easy to understand, the utility model is further described below in conjunction with specific diagrams. It should be noted that the terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the utility model are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described here can be implemented in an order other than that illustrated or described here. In addition, the term "including" or "having" and any variation thereof are intended to cover non-exclusive inclusions, for example, a product or device containing a series of components or units is not necessarily limited to those components or units clearly listed, but may include other components or components that are not clearly listed or inherent to these products or devices.

[0055] Reference Figure 1 , Figure 2 The utility model provides a terminal box threading nut locking device, including a device body, through which the threading nut 902 is screwed into the nut hole of the terminal box 901. The device body includes a base 1, a motor 2, a torque limiter 3, a first working head 401, a slide rail 5, and a first base 601. Among them, the base 1 provides an installation foundation for various components; the motor 2 is installed on the base 1; the torque limiter 3 is arranged on the rotating shaft of the motor 2; the first working head 401 is connected to the torque limiter 3, and after rotating with the torque limiter 3, it applies a force to the threading nut 902 to make it screw, so as to help it be tightened in the nut hole of the terminal box 901, and the first working head 401 has an opening for facilitating the insertion of the threading nut 902, and the inner wall of the opening has an inner hexagonal structure matching the outer hexagonal structure of the threading nut 902; the slide rail 5 is arranged on the base 1, and its length direction is parallel to the rotating shaft of the motor 2; the first base 601 reciprocates on the slide rail 5 after being connected to the slide rail 5;

[0056] The torque limiter 3 is located between the motor 2 and the first base 601 .

[0057] In some of the embodiments, the first base 601 is provided with an embedding groove for facilitating embedding of the junction box 901, so that it can play a certain clamping role on the junction box 901 and prevent it from being displaced during the threading nut locking operation and affecting the operation effect.

[0058] In order to prevent the output of the motor from damaging the torque limiter when the torque limiter fails and cannot slip, the utility model can be arranged in the following structure: the device body includes a coupling 7, and the coupling 7 connects the motor 2 and the torque limiter 3.

[0059] The utility model provides a coupling, which can protect the torque limiter from being damaged by secondary damage when the torque limiter fails. When setting, the rated torque of the coupling is slightly greater than the current working torque of the torque limiter, or the rated torque of the coupling is set to the maximum adjustable torque of the torque limiter.

[0060] After the coupling is set in the utility model, the length of the connection structure is relatively long. In order to increase the stability of the motor output, it can be set in the following structure: the device body includes a second base 602, a bearing and a connecting shaft 8, and the second base 602 is set on the base 1; the bearing is set on the second base 602; after the connecting shaft 8 passes through the bearing, one end is connected to the torque limiter 3 and the other end is connected to the coupling 7. The connecting shaft 8, the bearing and the second base 602 provide a good and stable intermediate connection effect for the coupling 7 and the torque limiter 3, so that the power output is smooth.

[0061] In order to ensure that the torque limiter is stably supported during operation, the present invention can be configured as follows: the device body includes a third base 603 , which is disposed on the base 1 and located between the slide rail 5 and the second base 602 ; the torque limiter 3 is fixed on the third base 603 .

[0062] In some embodiments, such as Figure 1 As shown, a push handle 6001 is also provided on the first base 601, which is convenient for manual operation to push the first base 601 toward the side of the torque limiter 3 or to pull the first base 601 away from the working position after completing the threading nut locking operation, so as to remove the workpiece (i.e., the junction box with the threading nut tightened).

[0063] Reference Figure 3 The utility model also provides a wiring nut assembly production line for a junction box, which includes a device body, a feeding component, and a pushing component.

[0064] The material conveying assembly includes a front conveyor 1001 and a rear conveyor 1002, the conveying directions of the two conveyors are perpendicular to the slide rail of the device body, and the slide rail is located between the front conveyor 1001 and the rear conveyor 1002;

[0065] The pusher assembly is located at one side of the slide rail and has a second working head 402 which is convenient for pushing the first base 601 toward or pulling it back to the torque limiter / first working head 401 .

[0066] When configuring an assembly production line, the device body of the utility model includes at least two first bases 601. After the multiple first bases 601 are sequentially transported to the pushing position by the feeding assembly, the pushing assembly pushes them along the slide rail to the assembly station for nut tightening.

[0067] It should be noted that Figure 3 Not all features of the device body are shown, only the first working head, the slide rail and the first base are shown.

[0068] In some embodiments, the material conveying assembly includes a lifting platform and a middle conveyor 1003, the middle conveyor 1003 is located between the front conveyor 1001 and the rear conveyor 1002, and the middle conveyor 1003 is mounted on the lifting platform;

[0069] The slide rail includes a first section of track 501 and a second section of track 502 . The first section of track 501 is located at the middle conveyor 1003 , between the two sections of conveying tracks of the middle conveyor 1003 ; the second section of track 502 is located between the first section of track 501 and the first working head 401 .

[0070] The utility model solves the transition problem at the material pushing station during the sequential transportation of multiple first bases by arranging a lifting platform and a middle section conveyor, so that the utility model can better connect the vertical transportation of the slide rail.

[0071] The utility model can further set the length of the second track 502 to be greater than the length of the first base 601. It should be noted that the length of the first base refers to its length along the slide rail. By setting the length of the second track to be greater than the length of the first base, the first base can completely fall on the second track during the pushing process, so that it is finally in a stable sliding state when it contacts the first working head, avoiding the situation where the other part of the first base is still on the separated first track when contacting the first working head due to the insufficient length of the second track, so that it cannot be accurately aligned and inserted into the opening of the first working head.

[0072] In order to facilitate the realization that the pusher assembly has the function of pushing the first base and also has the function of pulling it back to the conveying path of the feeder assembly, the utility model can be arranged in the following structure: In some embodiments, such as Figure 3 As shown, the pushing assembly includes a pushing cylinder 2001 , and a second working head 402 is provided at the end of the push rod of the pushing cylinder 2001 .

[0073] In some preferred embodiments, the second working head 402 adopts a suction cup, which is connected to a negative pressure generating device.

[0074] In order to facilitate the pushing of materials, the utility model can also pull the first base back to the conveying track of the feeding assembly after completing the threading nut locking operation. The second working head can be set as a suction cup. After the suction cup is connected to the negative pressure generating device, the suction cup surface generates negative pressure and then adsorbs the side wall of the first base, so that the first base is pulled back to the conveying path of the feeding assembly when the pushing cylinder is retracted. In this example setting, the side wall of the first base facing the suction cup is set as a vertical smooth plane.

[0075] It should be noted that, in order to cooperate with the feeding assembly, the utility model is provided with a photoelectric switch at the connection position of each section of the conveyor to detect whether the first base is in place, and is used to detect whether the first base has reached the pushing position, whether it has reached the locking operation position, etc. Since the setting of the photoelectric switch and the related electric control action setting and principle belong to the prior art, they will not be elaborated here.

[0076] In summary, the utility model helps to improve the working efficiency by setting the device body, ensures that the threading nut is screwed into place, and is not easy to damage the appearance of the nut or the junction box. During operation, the threading nut is first manually screwed into the nut hole of the junction box, and then the junction box is placed on the first base, and the first base is pushed forward to allow the first working head to be inserted into the threading nut. After starting the motor, the first working head is rotated. During the process, the threading nut is gradually screwed into and tightened in the nut hole. When it is tightened to a certain degree (that is, the torque limiter is adjusted to a torque suitable for the tight fit of the current junction box and the threading nut), the torque limiter slips, and this indicates that the nut is in place.

[0077] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A wiring nut locking device for a junction box, comprising a device body, characterized in that: The device body comprises: A base, the base providing a mounting base for each device; A motor, wherein the motor is mounted on the base; A torque limiter, the torque limiter is arranged on the rotating shaft of the motor; A first working head, the first working head is connected to the torque limiter, the first working head has an opening for inserting the threading nut, and the inner wall of the opening has an inner hexagonal structure matching the outer hexagonal structure of the threading nut; A slide rail, the slide rail is arranged on the base, and a length direction of the slide rail is parallel to the rotating shaft of the motor; a first base, the first base being connected to the slide rail and reciprocating thereon; The torque limiter is located between the motor and the first base.

2. The junction box threading nut locking device according to claim 1, characterized in that: The device body comprises: A coupling connects the motor and the torque limiter.

3. The terminal box threading nut locking device according to claim 2, characterized in that: The device body comprises: a second base, the second base being disposed on the base; A bearing, wherein the bearing is disposed on the second base; A connecting shaft, after passing through the bearing, has one end connected to the torque limiter and the other end connected to the coupling.

4. The terminal box threading nut locking device according to claim 3, characterized in that: The device body comprises: a third base, the third base being disposed on the base and located between the slide rail and the second base; The torque limiter is fixed on the third base.

5. The terminal box threading nut locking device according to claim 1, characterized in that: A push handle is provided on the first base.

6. Junction box threading nut assembly production line, characterized in that: The junction box threading nut assembly production line includes: A device body, wherein the device body is the device body according to any one of claims 1 to 5; A material conveying assembly, the material conveying assembly includes a front conveyor and a rear conveyor, the conveying directions of the two conveyors are perpendicular to the slide rail of the device body, and the slide rail is located between the front conveyor and the rear conveyor; A pusher assembly is located at one side of the slide rail and has a second working head for pushing the first base toward one side of the torque limiter.

7. The assembly line for the wiring nut of the junction box according to claim 6, characterized in that: The feeding assembly comprises: Lifting platform; A middle conveyor, the middle conveyor is located between the front conveyor and the rear conveyor, and the middle conveyor is erected on the lifting platform; The slide rail comprises: A first section of track, the first section of track is located at the middle section of the conveyor and between two sections of conveyor tracks of the middle section of the conveyor; A second track section, wherein the second track section is located between the first track section and the first working head.

8. The assembly line for the wiring nut of the junction box according to claim 7, characterized in that: The length of the second track section is greater than the length of the first base.

9. The assembly line for the wiring nut of the junction box according to claim 6, characterized in that: The pushing assembly comprises a pushing cylinder, and the second working head is arranged at the end of a push rod of the pushing cylinder.

10. The assembly line for the wiring nut of the junction box according to claim 9, characterized in that: The second working head adopts a suction cup, and the suction cup is connected to a negative pressure generating device.

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