A fixture for testing the welding strength of an electric motor

Abstract

The utility model relates to motor welding strength test technical field, and disclose a motor welding strength test is with clamp, including base, support rod and upper clamp piece, the support rod is penetrated and has been offered screw groove, the inside screw groove is connected with control screw rod, the side surface fixed connection of control screw rod has rotary head. This motor welding strength test is with clamp, has reduced the direct extrusion and friction to the surface of casing, thereby avoided the big scratch to the motor casing when testing, does not influence motor welding use again, the steel rope passes through the rope buckle, and is connected with the tension meter, and the steel rope is pulled up until the upper casing and lower casing separate, reads the tension meter count value and draws the welding quality, and the operation process is simple, and data reading is convenient, improves the test efficiency, and two groups of upper clamp piece are engaged with motor upper casing, and the connecting screw rod passes through the extension plate and forms the fastening, ensures that the upper casing is fixed firm, and will not loosen in the testing process because of stress.

Description

Technical Field

[0001] This utility model relates to the field of motor welding strength testing technology, specifically a fixture for testing motor welding strength. Background Technology

[0002] In the field of motor manufacturing, welding quality is a key factor affecting the reliability and safety of motors. During the welding strength test, a fixture is used to fix the motor.

[0003] According to a fixture for testing the welding strength of a motor published in CN212410264U, this solution can fix a permanent magnet stepper motor, making it convenient to test the welding strength of the permanent magnet stepper motor. At the same time, it has a simple structure, long service life, and low cost. It can conveniently and easily test the welding strength between the upper or lower housing and the fixing plate, and can also test the welding strength between the upper and lower housings, reducing the spot welding defect rate, improving the quality of spot welding and riveting strength, and preventing batch defective products from leaving the machine.

[0004] However, in actual operation, the inventors found the following problems: The above solution places the motor in the clamping space of the lower clamp, with the end of the locking bolt on the lower clamp abutting against the side of the upper housing. The upper clamp is located above the lower clamp, with the end of the locking bolt on the upper clamp abutting against the side of the lower housing. The push rod of the thrust gauge pushes the clamp seat of the upper clamp from top to bottom, and the upper clamp moves downward until the upper housing separates from the lower housing. The reading of the thrust gauge at this time is recorded to complete the motor welding strength test. However, the clamping method of abutting with the locking bolt will cause large scratches on the motor housing during the test, affecting the welding use in the future.

[0005] Based on this, the present invention provides a fixture for testing the welding strength of an electric motor. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a fixture for testing the welding strength of motors. It has the advantages of reducing direct pressure and friction on the surface of the housing, thereby avoiding large scratches on the motor housing during testing and not affecting the re-welding and use of the motor. It solves the problem in the background technology that the fixture, which uses locking bolts to abut against the motor, causes large scratches on the motor housing during testing, affecting its re-welding and use.

[0007] This utility model provides the following technical solution: a fixture for testing the welding strength of an electric motor, comprising a base, a support rod, and an upper clamping block. The support rod has a threaded groove through it, and a control screw is threadedly connected inside the threaded groove. A rotating head is fixedly connected to the side of the control screw, and a fixing rod is attached to the surface of the rotating head. A lower contact block is fixedly connected to the side of the fixing rod, and an adjusting rod is slidably connected inside the fixing rod. An upper contact block is fixedly connected to the side of the adjusting rod.

[0008] Preferably, the outer arc surface of the upper clamping block is fixedly connected to two sets of extension plates, both sets of extension plates are provided with threaded holes, the internal threads of the threaded holes are connected to connecting screws, and the top of the extension plates is fixedly connected to a rope loop.

[0009] Preferably, a support rod is fixedly installed on the top of the base, and there are four sets of support rods, which are evenly distributed.

[0010] Preferably, the support rod has two sets of limiting grooves through it, and the inside of each of the two sets of limiting grooves is fitted with a limiting rod, and a fixing rod is fixedly connected to the side of the limiting rod.

[0011] Preferably, the side of the fixing rod has a threaded connection hole, and the adjusting rod has a through-hole.

[0012] Preferably, the lower contact block and the upper contact block have the same shape characteristics.

[0013] Preferably, the threaded connection hole and one of the sets of mating holes are internally threaded with positioning screws.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This motor welding strength testing fixture uses a control screw to rotate inside a support rod, driving a fixedly connected rotating head to rotate. During this rotation, a limiting rod fixed to the support rod slides within the support rod, creating a limiting relationship that pushes the fixed rod horizontally. This allows it to fit the lower housing of the motor, ensuring the top of the lower contact block fixed to the side of the fixed rod contacts the lower housing. An adjusting rod then slides inside the fixed rod, bringing the upper contact block on its side into contact with the top of the lower housing. A positioning screw passes through the threaded connection hole in the fixed rod and aligns with the mating hole in the adjusting rod for threaded positioning, thus clamping the lower housing. Two sets of upper clamping blocks engage with the upper housing, and a connecting screw passes through an extension plate for final fastening. A steel rope is passed through the motor housing and connected to a tension gauge. Pulling the rope upwards until the upper and lower housings separate allows for measurement of the welding quality. The clamping method, using contact blocks that grip the housing, reduces direct pressure and friction on the housing surface compared to existing bolt-locking methods. This avoids significant scratches on the motor housing during testing and does not affect the motor's re-welding. The steel rope passes through a rope loop and connects to the tension gauge. Pulling the rope upwards until the upper and lower housings separate allows for measurement of the welding quality. The operation is simple, data reading is convenient, and testing efficiency is improved. Two sets of upper clamping blocks engage with the motor's upper housing, and connecting screws pass through the extension plate to form a secure fastener, ensuring the upper housing is firmly fixed and will not loosen under stress during testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0017] Figure 2 This utility model Figure 1 A schematic diagram of a partial structure;

[0018] Figure 3 This utility model Figure 1 Partial structural diagram;

[0019] Figure 4 This utility model Figure 3 A schematic diagram showing the connection between the control screw and the rotating head.

[0020] In the picture:

[0021] 1. Base;

[0022] 2. Support rod; 201. Control screw; 202. Limiting rod; 203. Fixing rod; 204. Lower contact block; 205. Positioning screw; 206. Adjusting rod; 207. Upper contact block; 208. Connecting hole; 209. Rotating head;

[0023] 3. Upper clamping block; 301. Extension plate; 302. Connecting screw; 303. Rope threading buckle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 A fixture for testing the welding strength of an electric motor includes a base 1, a support rod 2, and an upper clamping block 3. The support rod 2 has a threaded groove through it, and a control screw 201 is threaded into the groove. A rotating head 209 is fixedly connected to the side of the control screw 201. A fixing rod 203 is attached to the surface of the rotating head 209, and a lower contact block 204 is fixedly connected to the side of the fixing rod 203. An adjusting rod 206 is slidably connected inside the fixing rod 203, and an upper contact block 207 is fixedly connected to the side of the adjusting rod 206. The rotation of the control screw 201 within the support rod 2 drives the fixedly connected rotating head 209 to rotate. During the rotation of the rotating head 209 within the fixing rod 203, a limiting rod 202 fixedly connected to the fixing rod 203 slides within the support rod 2, creating a limiting relationship that pushes the fixing rod 203 horizontally. This allows for adaptation to electric motors. The lower housing is clamped by a locking block 204 fixedly connected to the side of the fixing rod 203, which contacts the top of the lower contact block 204 with the lower housing of the motor. The adjusting rod 206 slides inside the fixing rod 203, so that the upper contact block 207 on the side of the adjusting rod 206 contacts the top of the lower housing of the motor. The positioning screw 205 passes through the threaded connection hole of the fixing rod 203 and the mating hole 208 of the adjusting rod 206 to perform threaded positioning, thereby completing the clamping of the lower housing. The two sets of upper clamping blocks 3 are engaged with the upper housing of the motor, and the connecting screw 302 passes through the extension plate 301 to form a fastening. The clamping method of contacting the housing with the contact block reduces the direct extrusion and friction on the housing surface compared with the locking bolt abutment method in the prior art, thereby avoiding large scratches on the motor housing during testing and not affecting the re-welding and use of the motor.

[0026] The upper clamping block 3 has two sets of extension plates 301 fixedly connected to its outer arc surface. Both sets of extension plates 301 have through-holes with threaded holes. The threaded holes are connected to connecting screws 302. The top of the extension plates 301 is fixedly connected to a rope loop 303. A steel rope is passed through the rope loop 303 and then connected to a tension gauge. The steel rope is then pulled upward until the upper and lower shells separate. The welding quality can be obtained by reading the tension gauge value. The operation process is simple, the data is easy to read, and the testing efficiency is improved.

[0027] Among them, the top of the base 1 is fixedly installed with support rods 2, and there are four sets of support rods 2, which are evenly distributed.

[0028] The support rod 2 has two sets of limiting grooves through it, and the inside of the two sets of limiting grooves is fitted with a limiting rod 202. The side of the limiting rod 202 is fixedly connected with a fixing rod 203.

[0029] The fixed rod 203 has a threaded connection hole on its side, and the adjusting rod 206 has a mating hole 208 through it. The threaded connection hole and one of the mating holes 208 are internally threaded with a positioning screw 205.

[0030] The lower contact block 204 and the upper contact block 207 have the same shape characteristics.

[0031] Working principle: By controlling the screw 201 to rotate inside the support rod 2, the rotating head 209 fixedly connected to it rotates. During the rotation of the rotating head 209 inside the fixed rod 203, the limiting rod 202 fixedly connected to the fixed rod 203 slides inside the support rod 2, forming a limiting relationship, which pushes the fixed rod 203 horizontally. This allows it to fit into the lower housing of the motor, and makes the top of the lower contact block 204 fixedly connected to the side of the fixed rod 203 contact the lower housing of the motor. Then, by adjusting the rod 206 to slide inside the fixed rod 203, the adjusting rod 206 moves horizontally. The upper contact block 207 contacts the top of the lower housing of the motor. Then, the positioning screw 205 passes through the threaded connection hole of the fixing rod 203 and the mating hole 208 of the adjusting rod 206 to perform threaded positioning, thereby completing the clamping of the lower housing. Then, the two sets of upper clamping blocks 3 engage with the upper housing of the motor. Then, the connecting screw 302 passes through the extension plate 301 to form a fastening. The steel rope passes through 303 and is connected to the tension gauge. The steel rope is pulled upward until the upper housing and the lower housing separate. The welding quality can be obtained by reading the value of the tension gauge.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixture for testing the welding strength of an electric motor, characterized in that, The device includes a base (1), a support rod (2), and an upper clamping block (3). The support rod (2) has a threaded groove through it. A control screw (201) is threaded inside the threaded groove. A rotating head (209) is fixedly connected to the side of the control screw (201). A fixing rod (203) is attached to the surface of the rotating head (209). A lower contact block (204) is fixedly connected to the side of the fixing rod (203). An adjusting rod (206) is slidably connected inside the fixing rod (203). An upper contact block (207) is fixedly connected to the side of the adjusting rod (206).

2. The fixture for testing the welding strength of an electric motor according to claim 1, characterized in that: The outer arc surface of the upper clamping block (3) is fixedly connected to two sets of extension plates (301). Both sets of extension plates (301) are provided with threaded holes. The threaded holes are connected to connecting screws (302). The top of the extension plates (301) is fixedly connected to a rope buckle (303).

3. The fixture for testing the welding strength of an electric motor according to claim 1, characterized in that: The base (1) is fixedly installed with a support rod (2) on its top. There are four sets of the support rods (2), and the four sets of support rods (2) are evenly distributed.

4. The fixture for testing the welding strength of an electric motor according to claim 1, characterized in that: The support rod (2) has two sets of limiting grooves through it. The inside of the two sets of limiting grooves is fitted with a limiting rod (202). The side of the limiting rod (202) is fixedly connected with a fixing rod (203).

5. A fixture for testing the welding strength of an electric motor according to claim 1, characterized in that: The fixed rod (203) has a threaded connection hole on its side, and the adjusting rod (206) has a through-hole (208).

6. A fixture for testing the welding strength of an electric motor according to claim 1, characterized in that: The lower contact block (204) and the upper contact block (207) have the same shape characteristics.

7. A fixture for testing the welding strength of an electric motor according to claim 5, characterized in that: The threaded connection hole and one of the mating holes (208) are internally threaded with a positioning screw (205).

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