Motor front end cover drilling positioning tool

Abstract

The utility model relates to the field of fixture, disclose motor front end cover drilling positioning frock, including bottom plate, be provided with the support piece for supporting motor front end cover on the bottom plate, the support piece periphery evenly sets up multiple sets of clamping assembly, each group of clamping assembly surrounds and forms the cavity for installing motor front end cover, and the support piece top coaxially is provided with the pressing plate component for pressing motor front end cover, and the pressing plate component top is locked and fixed through locking piece, this pressing plate component includes the body and multiple pressing plate, the both ends of body and each group of pressing plate in multiple pressing plate are detachably connected, and each group of pressing plate corresponds to one kind of motor front end cover. The utility model is intended to improve the versatility of frock, so that a set of jig can adapt to the drilling processing of multiple different models motor front end cover.

Description

Technical Field

[0001] This utility model relates to the field of fixtures, specifically to a drilling and positioning fixture for the front end cover of a motor. Background Technology

[0002] In the manufacturing and assembly of motors, the end cover, as a key structural component, directly affects the performance and reliability of the entire machine due to its machining accuracy. This is especially true for the front end cover of bottom-mounted motors, where the circumferentially distributed mounting holes and their coaxiality with the bearing housing require extremely high precision. These mounting holes must be precisely aligned with the threaded holes on the motor housing to ensure smooth assembly and fastening of the end cover. Deviations in the drilling positions can lead to assembly difficulties and increased rework costs, or even uneven bolt preload, causing vibration and noise during motor operation, and potentially affecting bearing life and transmission accuracy. Therefore, when machining the mounting holes of the front end cover, high-precision positioning fixtures must be used to ensure the positional tolerance of each hole; this is one of the core aspects of ensuring motor product quality.

[0003] Currently, the industry commonly uses specialized drilling and positioning fixtures for drilling the front end cover of this type of bottom motor. Existing fixtures typically consist of basic components such as a base, a positioning mandrel, and a clamping mechanism. The design concept is as follows: the blank of the front end cover is fitted onto the positioning mandrel of the fixture, using its inner hole as a reference, to achieve radial positioning; simultaneously, a specific end face of the end cover is pressed tightly against the positioning plane of the fixture to achieve axial positioning. Subsequently, the operator uses a manual or pneumatic clamping mechanism to press the end cover firmly onto the positioning surface. The fixture is pre-installed with drill bushings that match the hole positions on the product drawings. During machining, the drill bit is guided by the drill bushings to drill holes in the end cover. This positioning method, based on "one face, one hole," is currently the most common and fundamental technical solution.

[0004] However, this traditional positioning tooling has obvious limitations: one tooling can usually only be adapted to one specific model of end cap. When the production line needs to change to process products of different specifications, the entire tooling must be replaced. This not only increases additional manufacturing costs, but also complicates tooling management and prolongs production preparation time. Furthermore, traditional lateral clamping may cause workpiece deformation or circumferential displacement, affecting machining accuracy. At the same time, the operation of using multiple bolts for clamping is cumbersome, and clamping and disassembly are time-consuming, which seriously restricts the improvement of production efficiency. Finally, in the face of the increasing demand for small-batch, multi-variety production, the existing rigid tooling design is difficult to achieve rapid changeover and cannot meet the requirements of modern flexible manufacturing. Utility Model Content

[0005] The present invention aims to provide a drilling and positioning fixture for the front cover of a motor, so as to improve the versatility of the fixture and enable a set of fixtures to adapt to the drilling of front covers of various different models of motors.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A drilling and positioning fixture for a motor front cover includes a base plate. A support member for supporting the motor front cover is provided on the base plate. Multiple sets of clamping components are evenly arranged on the outer periphery of the support member. Each set of clamping components surrounds a cavity for installing the motor front cover. A pressure plate assembly for pressing the motor front cover is coaxially arranged above the support member, and the pressure plate assembly is locked and fixed by a locking member. The pressure plate assembly includes a body and multiple pressure plates. Both ends of the body are detachably connected to each set of pressure plates, and each set of pressure plates corresponds to a type of motor front cover.

[0007] Beneficial effects: 1. By setting up multiple sets of detachable pressure plates, with each set of pressure plates corresponding to a different model of motor front cover, a set of tooling can be quickly adapted to process a variety of products of different specifications, which significantly improves the versatility of the tooling and avoids the need to manufacture special tooling for each model of workpiece.

[0008] 2. The tooling integrates a triple positioning and clamping mechanism of bottom support, lateral clamping and axial pressing. The support provides stable basic support for the workpiece, multiple clamping components apply force evenly from the outer periphery to ensure the center positioning of the workpiece, and the coaxial pressure plate component presses the workpiece on the support surface from above, effectively preventing the displacement and vibration of the workpiece during processing and ensuring the positional accuracy of drilling.

[0009] 3. By setting up support components, clamping components, and pressure plate components, the workpiece clamping process becomes simple and fast. The operator only needs to place the workpiece, and the lateral clamping components can automatically or semi-automatically achieve initial positioning. Then, the corresponding pressure plate is installed and fixed with locking components. Compared with the traditional method of adjusting the bolts one by one, the clamping and alignment time is greatly reduced, thereby significantly improving production efficiency.

[0010] Preferably, as an improvement, the end of the pressure plate away from the main body is provided with a clearance for drilling.

[0011] Beneficial effects: The clearance design provides ample operating space for the drill bit, allowing the drilling process to proceed smoothly. It avoids interference from the pressure plate itself with the processing tools, ensuring an unobstructed processing path. This not only improves processing efficiency but also prevents damage to the drill bit or tooling due to collisions, ensuring processing safety and quality.

[0012] Preferably, as an improvement, the end of the pressure plate away from the main body is also formed with an abutment portion, which is located on both sides of the clearance opening, and the abutment portion is provided with an anti-slip portion.

[0013] Beneficial effects: The abutment parts located on both sides of the clearance opening achieve a stable and balanced clamping force on the workpiece, preventing the workpiece from warping or shifting during processing. The anti-slip part further enhances the friction between the pressure plate and the workpiece surface, significantly improving the reliability and stability of clamping, thereby ensuring that the workpiece position remains consistent under drilling vibration and guaranteeing the processing accuracy of the hole.

[0014] Preferably, as an improvement, each clamping component includes a slide rod, a spring, a clamping plate, and a limiting plate. Multiple slide rods are horizontally arranged on the support member, the limiting plate is fixed to the free end of the slide rod, the clamping plate is slidably sleeved on the multiple slide rods, and the spring is sleeved on the outer periphery of the slide rod and located between the clamping plate and the limiting plate.

[0015] Beneficial effects: The spring in this clamping assembly provides continuous preload, enabling the clamping plate to automatically adapt to and hold the outer edge of the workpiece. It also has a certain tolerance for the dimensional tolerances of the workpiece. The slide bar ensures the linearity and stability of the clamping plate movement, while the limiting plate effectively prevents the clamping plate from detaching from the slide bar during workpiece loading and unloading or in case of accidents, thus improving the safety and reliability of the tooling. At the same time, it provides a support point for the spring, giving it elasticity. The three elements work together to achieve automatic centering and flexible clamping of this clamping assembly.

[0016] Preferably, as an improvement, the clamping plate includes an integrally formed slider and a support block. The slider is slidably connected to the slide rod, and the support block is disposed on the side close to the support member, with the upper end face of the support block and the top of the support member located on the same horizontal plane.

[0017] Beneficial effects: The one-piece molded structure ensures the strength and rigidity of the clamping plate, making it less prone to deformation when subjected to clamping force. In addition, the upper surface of the support block is flush with the top surface of the support component, so that the workpiece can receive both bottom support and initial lateral positioning when placed, ensuring the stability of the workpiece placement.

[0018] Preferably, as an improvement, the support member is in the shape of a ring.

[0019] Beneficial effects: The ring-shaped support can stably support the end face of the motor front cover. At the same time, its hollow structure can perfectly avoid the area that needs to be processed in the middle of the workpiece. It can provide the necessary space below for drilling operations, prevent the drill bit from colliding with the tooling base plate, and ensure the uniformity and effectiveness of the support. The structure is simple and highly functional.

[0020] Preferably, as an improvement, both the base plate and the body are provided with mounting holes for the positioning shaft to pass through.

[0021] Beneficial effects: The mounting holes on the base plate and the body allow the positioning shaft to pass through the pressure plate assembly, the workpiece and the base plate in sequence, achieving precise alignment of the upper, middle and lower parts. This ensures that the pressure plate assembly and the support are strictly coaxial, thereby ensuring that the workpiece is subjected to uniform force and is centered when it is pressed, which greatly improves the positioning accuracy and repeatability of the entire tooling system. Attached Figure Description

[0022] Figure 1 This is an exploded view of an embodiment of the present utility model.

[0023] Figure 2 This is a structural schematic diagram of an embodiment of the present utility model.

[0024] Figure 3 This is a cross-sectional view of an embodiment of the present utility model.

[0025] Figure 4 This is a schematic diagram of the clamping assembly in an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the pressure plate assembly in an embodiment of the present invention.

[0027] The reference numerals in the accompanying drawings include: base plate 1, support member 2, clamping assembly 3, slide bar 31, spring 32, clamping plate 33, slider 331, support block 332, limiting plate 34, pressure plate assembly 4, body 41, pressure plate 42, clearance opening 43, abutment part 44, and locking member 5. Detailed Implementation

[0028] The following detailed description illustrates the specific implementation method: The basic implementation examples are as follows: Figure 1 As shown: like Figure 1 As shown, this embodiment provides a drilling and positioning fixture for a motor front cover, including a base plate 1. The base plate 1 has a mounting hole in the middle for a positioning shaft to pass through, and a support member 2 for supporting the motor front cover is provided on the base plate 1. In this embodiment, the support member 2 is annular to facilitate supporting the end face of the motor front cover and to avoid the position of the hole to be drilled in the middle of the front cover.

[0029] like Figure 2 and Figure 3As shown, multiple sets of clamping components 3 are evenly arranged around the outer periphery of the support member 2. In this embodiment, the number of clamping components 3 is 4, and each clamping component 3 is located around the bottom plate 1 to clamp the four sides of the motor front cover. Each set of clamping components 3 encloses a cavity for installing the motor front cover. Each clamping component includes a slide rod 31, a spring 32, a clamping plate 33, and a limiting plate 34. Multiple slide rods 31 are horizontally arranged on the support member 2. In this embodiment, there are 2 slide rods 31. The limiting plate 34 is fixed to the free end of the slide rod 31 to limit the movement distance of the clamping plate 33 and prevent the clamping plate 33 from detaching due to excessive pressure. The clamping plate 33 is slidably sleeved on the multiple slide rods 31. The spring 32 is sleeved on the outer periphery of the slide rod 31 and is located between the clamping plate 33 and the limiting plate 34.

[0030] Furthermore, such as Figure 4 As shown, the clamping plate 33 includes an integrally formed slider 331 and a support block 332. The slider 331 is slidably connected to the slide rod 31. The support block 332 is located on the side close to the support member 2. The side of the support block 332 facing the support member 2 is arc-shaped, and its curvature is consistent with that of the support member 2. The upper end surface of the support block 332 is on the same horizontal plane as the top of the support member 2, so that the bottom surface of the motor front cover can be placed on the support member 2 and the support block 332, so that the support member 2 and the support block 332 jointly support the motor front cover.

[0031] like Figure 1 and Figure 5 As shown, a pressure plate assembly 4 for pressing the front end cover of the motor is coaxially arranged above the support member 2, and the pressure plate assembly 4 is locked and fixed by a locking member 5. In this embodiment, the pressure plate assembly 4 includes a body 41 and multiple pressure plates 42. The body 41 has a mounting hole in the middle for the positioning rod to pass through. After the positioning rod passes through the mounting hole, it is connected and fixed by the locking member 5, which is a nut. The two ends of the body 41 are detachably connected to each group of pressure plates 42, and each group of pressure plates 42 corresponds to a type of front end cover of the motor. Specifically, the side of the pressure plate 42 near the body 41 is provided with a receiving groove, and the two ends of the body 41 can be snapped into the receiving groove, and the snapping part is connected by bolts and nuts. The end of the pressure plate 42 away from the body 41 is provided with a clearance opening 43 for drilling, and the end of the pressure plate 42 away from the body 41 is also provided with an abutment portion 44, which is located on both sides of the clearance opening 43, and the abutment portion 44 is provided with an anti-slip portion (not shown in the figure). Specifically, the anti-slip portion consists of multiple small protrusions.

[0032] The process of using the above-mentioned device is as follows: The side of the motor front cover workpiece that needs to be processed is inverted and placed stably on the annular support 2 on the base plate 1, so that its end face is supported and avoids the central drilling area; then, due to the workpiece's own weight and the placement action, it will naturally squeeze the clamping components 3 around it. At this time, the clamping plate 33 sleeved on the slide rod 31 presses the workpiece under the action of the spring 32, thereby holding the outer edge of the workpiece from the side for positioning, while the limiting plate 34 at the free end of the slide rod 31 can provide a support point for the spring 32, so that it has elasticity; next, select the corresponding pressure plate 42 according to the workpiece model, and snap the receiving groove at one end of it with both ends of the body 41 of the pressure plate assembly 4 and tighten it with bolts and nuts. Then, the positioning rod passes through the middle of the pressure plate assembly 4 in sequence. The mounting holes are installed in the center hole of the workpiece and the mounting holes of the base plate 1. Finally, the locking member 5 is tightened to press down the pressure plate 42. At this time, the abutment part 44 of the end of the pressure plate 42 away from the body 41 firmly presses the upper surface of the workpiece. The anti-slip part provided on the abutment part 44 enhances the stability of the pressing. The clearance opening 43 provided on the same end of the pressure plate 42 provides operating space for drilling. After the workpiece is completely fixed in the cavity formed by the support member 2 and the clamping member 3 by the side clamping assembly 3 and the upper pressure plate assembly 4, the drilling operation can be performed on the front end cover of the motor through the clearance opening 43. After the processing is completed, the locking member 5 is loosened and the pressure plate assembly 4 is removed. The processed workpiece can then be removed. At this time, the side clamping assembly 3 automatically resets under the rebound of the spring 32 for the next use.

[0033] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A drilling and positioning fixture for the front cover of a motor, including a base plate, characterized in that: The base plate is provided with a support member for supporting the front cover of the motor. Multiple sets of clamping components are evenly arranged around the outer periphery of the support member. Each set of clamping components surrounds a cavity for installing the front cover of the motor. A pressure plate assembly for pressing the front cover of the motor is coaxially arranged above the support member. The pressure plate assembly is locked and fixed above by a locking member. The pressure plate assembly includes a body and multiple pressure plates. Both ends of the body are detachably connected to each set of pressure plates among the multiple pressure plates. Each set of pressure plates corresponds to a type of front cover of the motor.

2. The drilling and positioning fixture for the motor front end cover according to claim 1, characterized in that: The end of the pressure plate away from the main body is provided with a clearance opening for drilling.

3. The drilling and positioning fixture for the motor front end cover according to claim 2, characterized in that: The end of the pressure plate away from the main body also has an abutment portion, which is located on both sides of the clearance opening, and the abutment portion is provided with an anti-slip portion.

4. The drilling and positioning fixture for the front cover of the motor according to claim 1, characterized in that: Each clamping component includes a slide rod, a spring, a clamping plate, and a limiting plate. Multiple slide rods are horizontally arranged on the support member. The limiting plate is fixed to the free end of the slide rod. The clamping plate is slidably sleeved on the multiple slide rods. The spring is sleeved on the outer periphery of the slide rod and is located between the clamping plate and the limiting plate.

5. The drilling and positioning fixture for the motor front end cover according to claim 4, characterized in that: The clamping plate includes an integrally formed slider and a support block. The slider is slidably connected to the slide rod. The support block is located on the side close to the support member, and the side of the support block facing the support member is arc-shaped with the same curvature as the support member. The upper surface of the support block is on the same horizontal plane as the top of the support member.

6. The drilling and positioning fixture for the motor front end cover according to claim 1, characterized in that: The support component is ring-shaped.

7. The drilling and positioning fixture for the front end cover of the motor according to claim 1, characterized in that: Both the base plate and the main body are provided with mounting holes for the positioning shaft to pass through.

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