A special fixture for drilling motor shaft
By designing a front and rear clamping mechanism for a special fixture for drilling motor shafts, the problem of unstable fixing of the motor shaft during drilling was solved, enabling efficient and precise drilling operations and reducing operational difficulty and labor intensity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TAIYUAN JINGFENG RAILWAY EQUIP MANUFCTURING CO LTD
- Filing Date
- 2022-08-23
- Publication Date
- 2026-06-09
AI Technical Summary
Existing special tooling for drilling motor shafts suffers from axial movement and radial rotation when fixing the motor shaft, making it difficult to guarantee drilling accuracy. It is labor-intensive, requires high operating skills, and has low work efficiency.
A special fixture for drilling motor shafts was designed, comprising a front clamping mechanism and a rear clamping mechanism. Through the adjustable setting of the front and rear clamping blocks, the axial and radial fixation of the motor shaft can be achieved, adapting to the fixation of motor shafts of different models.
This achieves stable clamping of the motor shaft, ensuring drilling accuracy, reducing the labor intensity and skill requirements of operators, and improving work efficiency.
Smart Images
Figure CN115383486B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of special machining fixtures, and in particular to a special fixture for drilling motor shafts. Background Technology
[0002] As a crucial component responsible for the rotation of the motor, the motor shaft serves as the link between the motor and the equipment for electromechanical energy conversion. It supports rotating parts and transmits torque to the driven components. Its strength and fit precision directly determine whether the motor can operate reliably under normal conditions.
[0003] Traditionally, when drilling motor shafts, the motor is placed in a special fixture, the shaft is positioned in a V-groove, and a bench drill is used for drilling. However, existing fixtures do not provide ideal fixation for the motor shaft, allowing for axial movement and radial rotation during drilling, which cannot guarantee the required drilling accuracy. Furthermore, this method is labor-intensive, demands high operator skills, and has low efficiency, failing to meet the current drilling needs for motor shafts.
[0004] Therefore, it is evident that the existing special tooling for drilling motor shafts still has inconveniences and defects in terms of structure, method, and use, and urgently needs further improvement. How to create a new special fixture for drilling motor shafts that can firmly fix the motor shaft axially and radially, ensure drilling accuracy, and reduce labor intensity and operational skill requirements has become a pressing goal for the industry. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to provide a special fixture for drilling motor shafts, which can firmly fix the motor shaft in the axial and radial directions, ensure drilling accuracy, reduce labor intensity and operation skill requirements, thereby overcoming the shortcomings of existing special tooling for drilling motor shafts.
[0006] To solve the above-mentioned technical problems, the present invention provides a special fixture for drilling motor shafts, including a base plate and a front clamping mechanism and a rear clamping mechanism disposed thereon. The front clamping mechanism includes a front support seat, a front clamping block, an adjusting rod and an adjusting nut. The front support seat is fixed to the front part of the base plate and has a motor shaft front end fixing groove on its top. The front clamping block is configured as a C-shaped flip-up component. The lower part of the C-shaped flip-up component is hinged to the lower part of the front side wall of the front support seat. The middle part of the C-shaped flip-up component has a vertical adjustment hole. One end of the adjusting rod is hinged to the front support seat, the middle part of the adjusting rod passes through the vertical adjustment hole, and the other end is threaded to the adjusting nut. When the C-shaped flip-up component flips upward to press the front end of the motor shaft, the tightening of the adjusting nut relative to the adjusting rod realizes the clamping and fixing of the front end of the motor shaft by the front clamping block.
[0007] The rear clamping mechanism includes a rear support base, a rear clamping block, and a clamping screw. The rear support base is fixed to the middle and rear part of the base plate, and its top is provided with a fixing groove for the rear end of the motor shaft. The rear clamping block achieves clamping and fixing of the rear end of the motor shaft under the tightening action of the clamping screw.
[0008] As a further improvement, the upper inner side of the C-shaped flip-up component is provided with an arc-shaped groove structure that matches the shape of the front end of the motor shaft.
[0009] In a further improvement, the outer side of the C-shaped flip-up component is provided with an inclined plane, the adjustment hole extends to the center of the inclined plane, and the adjustment nut abuts against the inclined plane when tightened.
[0010] In a further improvement, the lower part of the C-shaped flip-up component and the lower part of the adjusting rod are both hinged to the front support seat by elastic cylindrical pins, and the adjusting nut is a wing nut.
[0011] In a further improvement, the rear clamping mechanism also includes a support base disposed below the rear clamping block. The support base is fixed to the rear of the base plate. A support column is provided on the upper rear side of the support base. The top of the support column abuts against the rear end of the rear clamping block. A threaded hole matching the clamping screw is provided on the upper front side of the support base. The front end of the rear clamping block is configured as an arc-shaped groove structure matching the shape of the rear end of the motor shaft. A horizontal guide groove is provided in the middle of the rear clamping block. The clamping screw passes through the horizontal guide groove and is threadedly connected to the threaded hole. The rear clamping block slides horizontally relative to the clamping screw to avoid motor disassembly and assembly.
[0012] As a further improvement, the rear end of the bottom of the rear clamping block is provided with a limiting groove for the top of the support column to be placed.
[0013] As a further improvement, a spring is fitted around the outer circumference of the clamping screw, and the nut of the clamping screw is a wing-shaped nut.
[0014] In a further improvement, the rear clamping mechanism also includes a positioning block, one end of which protrudes from the groove of the rear end fixing groove of the motor shaft, for axial positioning of the rear end of the motor shaft.
[0015] In a further improvement, the rear clamping mechanism also includes a drill sleeve fixing plate extending above the fixing groove at the rear end of the motor shaft. The drill sleeve fixing plate is provided with a through hole corresponding to the motor shaft hole to be drilled, and the drill sleeve is fixed in the through hole.
[0016] As a further improvement, the drill bushing fixing plate is also provided with a clamping plate for pressing the drill bushing.
[0017] With this design, the present invention has at least the following advantages:
[0018] This invention relates to a special fixture for drilling motor shafts. By incorporating a front clamping mechanism and a rear clamping mechanism, it can fix both sides of a bidirectional output shaft motor. Furthermore, the adjustable front and rear clamping blocks can accommodate axial and radial fixation of motor shafts of different sizes and models, preventing axial movement and radial rotation of the motor shaft during drilling and ensuring drilling accuracy. This special fixture is also easy to install and remove, simple to operate, highly efficient, reduces the labor intensity of operators, and significantly lowers the skill requirements for operators. Attached Figure Description
[0019] The above is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0020] Figure 1 This is a schematic diagram of the structure of the special jig for drilling motor shafts of the present invention for clamping motor shafts.
[0021] Figure 2 This is an exploded structural diagram of the special fixture for drilling motor shafts according to the present invention.
[0022] Figure 3 This is a schematic diagram of the front clamping block in the special fixture for drilling motor shafts of the present invention.
[0023] Figure 4 This is a schematic diagram of the rear clamping block in the special fixture for drilling motor shafts of the present invention. Detailed Implementation
[0024] This application presents a special fixture for drilling motor shafts, used in motors with bidirectional output shafts. It uses a front and rear clamping mechanism to axially and radially fix the front and rear ends of the motor shaft, enabling drilling and opening of holes on the rear end of the motor shaft. The fixture features a simple structure, convenient assembly and disassembly, high efficiency, good consistency in processing dimensions and accuracy, reduced labor intensity for operators, and significantly lower skill requirements. Specific embodiments are as follows.
[0025] See attached document Figure 1 and 2 As shown, the special fixture for drilling motor shafts in this embodiment includes a base plate 1 and a front clamping mechanism and a rear clamping mechanism disposed thereon.
[0026] The front clamping mechanism includes a front support seat 7, a front clamping block 2, an adjusting rod 4, and an adjusting nut 3. The front support seat 7 is fixed to the front part of the base plate 1 by screws, and its top is provided with a motor shaft front end fixing groove 71. The motor shaft front end fixing groove 71 adopts a V-shaped groove, an inverted trapezoidal groove, or an arc-shaped groove structure to achieve radial fixing of the front end A of the motor shaft.
[0027] The front clamping block 2 is configured as a C-shaped flip-up component. The lower part of the C-shaped flip-up component is directly hinged to the lower part of the front side wall of the front support seat 7 via an elastic cylindrical pin 21. The middle part of the C-shaped flip-up component is provided with a vertical adjustment hole 22. The lower part of the adjustment rod 4 is also hinged to the middle part of the front side wall of the front support seat 7 via an elastic cylindrical pin 41, so that both the C-shaped flip-up component and the adjustment rod can be flipped up and down relative to the front support seat 7. The middle part of the adjustment rod 4 passes through the vertical adjustment hole 22, and its other end is threaded to the adjustment nut 3. When the C-shaped flip-up component flips upward until its upper part presses against the front end A of the motor shaft, the adjustment rod 4 drives the adjustment nut 3 to move to the optimal position in the vertical adjustment hole 22, and the front clamping block 2 presses and fixes the front end A of the motor shaft under the tightening action of the adjustment nut 3. In this application, the optimal position refers to the tightest position when the adjusting rod 4 is in the optimal contact position between the front clamping block 2 and the front end A of the motor shaft, generally referring to the highest position that the adjusting rod 4 can reach in the vertical adjusting hole 22. By adjusting the tightness of the adjusting rod 4, the front clamping mechanism can adjustably clamp and fix motor shafts of different models, making it suitable for clamping and fixing various types of motor shafts. Alternatively, the lower part of the C-shaped flip-up component can also be connected to the lower part of the front sidewall of the front support seat 7 via a connecting post 5. The connecting post 5 is fixedly connected to the front support seat 7 by screws, and the lower part of the C-shaped flip-up component is hinged to the connecting post 5 via an elastic cylindrical pin. Similarly, the lower part of the adjusting rod 4 can also be connected to the middle part of the front sidewall of the front support seat 7 via a connecting post 6. The connecting post 6 is fixedly connected to the front support seat 7 by screws, and the lower part of the adjusting rod 4 is hinged to the connecting post 6 via an elastic cylindrical pin.
[0028] More specifically, as shown in the appendix Figure 3 As shown, the upper inner side of the C-shaped rotatable component is provided with an arc-shaped groove structure 24 that matches the shape of the front end A of the motor shaft. The outer side of the C-shaped rotatable component is provided with an inclined plane 23, and the vertical adjustment hole 22 extends to the center of the inclined plane 23. When the C-shaped rotatable component is flipped upward, its arc-shaped groove structure 24 presses against the front end A of the motor shaft, the adjustment rod 4 moves to the optimal position in the vertical adjustment hole 22, and the adjustment nut 3 is tightened relative to the adjustment rod 4, thereby achieving a tight contact with the inclined plane 23, and finally achieving the axial and radial clamping and fixing of the front end A of the motor shaft by the front clamping block 2.
[0029] In this embodiment, the front clamping block 2 can adjust the flipping angle according to the different sizes and models of the motor shaft. Through the cooperation of the adjusting nut 3 and the adjusting rod 4, it can achieve fixed clamping at different flipping angles, so that the special fixture can be used to fix the motor shaft of different models and sizes axially and radially, avoiding the axial movement and radial rotation of the motor shaft during drilling, and ensuring the accuracy requirements of drilling.
[0030] The adjusting nut 3 is a wing-shaped nut, which is convenient for operators to tighten.
[0031] The rear clamping mechanism described in this embodiment includes a rear support base 8, a rear clamping block 14, a clamping screw 13, and a support base 15. The rear support base 8 is fixed to the middle and rear part of the base plate 1 by screws, and its top is provided with a motor shaft rear end fixing groove 81 for placing the rear end B of the motor shaft. Similarly, the motor shaft rear end fixing groove 81 can adopt a V-groove, an inverted trapezoidal groove, or an arc-shaped groove structure to achieve radial fixing of the rear end B of the motor shaft. The support base 15 is fixed to the rear part of the base plate 1 by screws and is located below the rear clamping block 14. The upper rear side of the support base 15 is provided with a support column 16, the top of which abuts against the rear end of the rear clamping block 14, providing support for the rear clamping block 14. The upper front side of the support base 15 is provided with a threaded hole 17 that matches the clamping screw 13. The front end of the rear clamping block 14 is configured as an arc-shaped groove structure 141 that matches the shape of the rear end B of the motor shaft. A horizontal guide groove 142 is provided in the middle of the rear clamping block 14. The clamping screw 13 passes through the horizontal guide groove 142 and is threadedly connected to the threaded hole 17. The rear clamping block 14 slides horizontally relative to the clamping screw 13 to avoid disassembly and assembly of the motor. Under the tightening action of the clamping screw 13, the rear clamping block 14 is pressed and fixed to the rear end B of the motor shaft, thereby achieving clamping and fixing of the motor shaft.
[0032] See attached document Figure 4 As shown, the rear end of the rear clamping block 14 in this embodiment is provided with a limiting groove 143 for the top of the support column 16 to be placed, which can limit the support position of the support column 16 and prevent the rear clamping block 14 from tilting or misaligning during the clamping process, thus playing a limiting role for the support column 16.
[0033] Furthermore, a spring 18 is sleeved around the outer circumference of the clamping screw 13, providing elastic support for the rear clamping block 14. The nut of the clamping screw 13 is a wing-shaped nut, which facilitates tightening by the operator.
[0034] In a further improvement, the rear clamping mechanism also includes a positioning block 12, which is fixed to the rear side wall of the rear support 8 by screws. One end of the positioning block 12 protrudes from the groove of the rear end fixing groove 81 of the motor shaft and is used to axially position the rear end B of the motor shaft.
[0035] In this embodiment, the rear clamping mechanism further includes a drill sleeve fixing plate 9 extending above the rear end fixing groove 81 of the motor shaft. The drill sleeve fixing plate 9 is fixed to the rear support base 8 by screws, and its end extends above the rear end fixing groove 81 of the motor shaft. The drill sleeve fixing plate 9 is provided with a through hole 91 corresponding to the motor shaft hole to be drilled, and the drill sleeve 10 is fixed in the through hole 91. The drill sleeve fixing plate 9 is also provided with a clamping plate 11 for clamping the drill sleeve 10. The clamping plate is fixed to the upper surface of the drill sleeve fixing plate 9 by screws, and is used to clamp the drill sleeve 10, so that the drilling machine can drill the rear end of the motor shaft from above after passing through the drill sleeve 10.
[0036] When using the special fixture for drilling motor shafts of the present invention, the motor is first placed in the fixture, that is, the front end A of the motor shaft is placed in the front end fixing groove 71 of the motor shaft, and the rear end B of the motor shaft is placed in the rear end fixing groove 81 of the motor shaft. The rear end B of the motor shaft is first axially positioned by the positioning block 12. Then, the rear clamping block 14 is pressed and connected to the rear end B of the motor shaft through the horizontal guide groove 142, and tightened by the clamping bolt 13 to achieve the clamping and fixing of the rear clamping block 14 to the rear end B of the motor shaft. Next, the front clamping block 2 is rotated upward and flipped to the front end A of the motor shaft, so that the arc-shaped groove structure 24 of the front clamping block 2 is connected to the front end A of the motor shaft. Then, the adjusting nut 3 drives the adjusting rod 4 to rotate to the optimal position through the vertical adjusting groove 22 and tightens it to achieve the axial and radial clamping and fixing of the front end A of the motor shaft by the front clamping block 2. At this time, the rear end of the motor shaft can be drilled from above by a bench drill.
[0037] This special fixture is an economical and practical special machining fixture, mainly used for batch processing of end holes of various series of motor shafts. It is suitable for bench drills. The various parts of this special fixture are easy to install and remove, simple to operate, and highly efficient, meeting the requirements for rapid switching of multiple types of motor shafts.
[0038] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.
[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, or alterations made by those skilled in the art using the disclosed technical content shall fall within the protection scope of the present invention.
Claims
1. A special fixture for drilling motor shafts, characterized in that, The device includes a base plate and a front clamping mechanism and a rear clamping mechanism mounted thereon. The front clamping mechanism includes a front support seat, a front clamping block, an adjusting rod, and an adjusting nut. The front support seat is fixed to the front part of the base plate and has a motor shaft front end fixing groove on its top. The front clamping block is a C-shaped flip-up component. The lower part of the C-shaped flip-up component is hinged to the lower part of the front side wall of the front support seat. The middle part of the C-shaped flip-up component has a vertical adjustment hole. One end of the adjusting rod is hinged to the front support seat, the middle part of the adjusting rod passes through the vertical adjustment hole, and the other end is threaded to the adjusting nut. When the C-shaped flip-up component flips upward to press the front end of the motor shaft, the tightening of the adjusting nut relative to the adjusting rod achieves the clamping and fixing of the front end of the motor shaft by the front clamping block. The rear clamping mechanism includes a rear support base, a rear clamping block, and a clamping screw. The rear support base is fixed to the middle and rear part of the base plate, and its top is provided with a motor shaft rear end fixing groove. The rear clamping block achieves clamping and fixing of the motor shaft rear end under the tightening action of the clamping screw. The upper inner side of the C-shaped flip-up component is provided with an arc-shaped groove structure that matches the shape of the front end of the motor shaft; the outer side of the C-shaped flip-up component is provided with an inclined plane, the adjustment hole extends to the center of the inclined plane, and the adjustment nut abuts against the inclined plane when tightened; the lower part of the C-shaped flip-up component and the lower part of the adjustment rod are both hinged to the front support seat by elastic cylindrical pins, and the adjustment nut is a wing nut.
2. The special fixture for drilling motor shafts according to claim 1, characterized in that, The rear clamping mechanism also includes a support base disposed below the rear clamping block. The support base is fixed to the rear of the base plate. A support column is provided on the upper rear side of the support base. The top of the support column abuts against the rear end of the rear clamping block. A threaded hole matching the clamping screw is provided on the upper front side of the support base. The front end of the rear clamping block is configured as an arc-shaped groove structure matching the shape of the rear end of the motor shaft. A horizontal guide groove is provided in the middle of the rear clamping block. The clamping screw passes through the horizontal guide groove and is threadedly connected to the threaded hole. The rear clamping block slides horizontally relative to the clamping screw to avoid motor disassembly and assembly.
3. The special fixture for drilling motor shafts according to claim 2, characterized in that, The rear end of the rear clamping block is provided with a limiting groove for the top of the support column to be placed.
4. The special fixture for drilling motor shafts according to claim 3, characterized in that, The clamping screw has a spring sleeved on its outer circumference, and the nut of the clamping screw is a wing-shaped nut.
5. The special fixture for drilling motor shafts according to claim 2, characterized in that, The rear clamping mechanism also includes a positioning block, one end of which protrudes from the groove of the rear fixing groove of the motor shaft, for axial positioning of the rear end of the motor shaft.
6. The special fixture for drilling motor shafts according to claim 5, characterized in that, The rear clamping mechanism also includes a drill sleeve fixing plate extending above the fixing groove at the rear end of the motor shaft. The drill sleeve fixing plate is provided with a through hole corresponding to the motor shaft hole to be drilled, and the drill sleeve is fixed in the through hole.
7. The special fixture for drilling motor shafts according to claim 6, characterized in that, The drill bushing fixing plate is also provided with a clamping plate for pressing the drill bushing.