Hydraulic clamp for machining parts for motor detection equipment

Abstract

The invention discloses a hydraulic clamp for machining parts for motor detection equipment, and particularly relates to the technical field of precision machine manufacturing and tool clamps. The clamp comprises a device body, a square plate is fixed in the device body through a mounting plate, a plurality of sliding rods distributed in a radial shape are connected to the periphery of the square plate in a sliding mode, clamping plates are hinged to the top ends of the sliding rods, the clamping plates are connected through third springs, and a radial clamping mechanism capable of adapting to the outer contours of parts of different sizes and shapes is formed. And meanwhile, a cylindrical clamping block driven by a first hydraulic cylinder is arranged in the device body, a pressing head is detachably installed at the bottom of the cylindrical clamping block through a self-adaptive clamping assembly, and axial pressing of the parts is achieved. Through the synergistic effect of radial self-adaptive clamping and the axial replaceable pressure head, the problems that an existing clamp is unstable in clamping of special-shaped and easily-deformed motor detection parts, easy to damage and low in efficiency are solved, and the machining precision and the operation convenience are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of precision machinery manufacturing and tooling fixture, in particular to a hydraulic fixture for machining of parts for motor detection equipment. BACKGROUND

[0002] Motor detection equipment, such as dynamometers, vibration test benches, noise testers, etc., contains a large number of precision mechanical parts inside, such as sensor brackets, rotor positioning sleeves, bearing seats, connecting flanges, etc. These parts usually have complex structure, high dimensional accuracy requirements, small batch size, and many varieties, and some parts are thin-walled or special-shaped structures with poor rigidity. When performing subsequent machining or repair work such as drilling, milling, tapping, etc., the traditional general fixture (such as vise, three-jaw chuck) or special fixture has obvious shortcomings: the general fixture is difficult to stably and accurately clamp special-shaped parts, which may cause workpiece deformation or displacement, affecting machining accuracy; and the special fixture designed and manufactured for each specific part is costly and time-consuming, and cannot adapt to the multi-variety and small-batch production mode.

[0003] In the prior art, there are also some fixtures driven by hydraulic or pneumatic pressure, but they often have complex structure and fixed clamping range, and have poor adaptability to parts with large size differences. In particular, for motor detection equipment parts, the clamping points need to be evenly distributed to avoid excessive local stress causing part deformation or surface damage. In addition, when machining different surfaces or performing different processes, the existing fixtures often need to replace the pressure head or clamping method, and the changing process of the existing fixtures is usually cumbersome, reducing production efficiency. Therefore, we propose a hydraulic fixture for machining of parts for motor detection equipment to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a hydraulic fixture for machining of parts for motor detection equipment to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present application provides the following technical solution: A hydraulic fixture for machining of parts for motor detection equipment, comprising a device body, a control switch is arranged outside the device body, an installation plate is fixedly installed inside the device body, a square plate is fixedly connected to the top of the installation plate, a plurality of sliding rods are radially distributed and slidably connected to the outer periphery of the square plate, a clamping plate is rotatably connected to the outside of each sliding rod by a hinged manner, a third spring is fixedly connected between the inner side walls of the clamping plate, and the third spring can make the clamping plate self-adaptively fit the outer contour of the part through elastic force, so as to clamp and fix it. The inside of the device body is provided with a cylindrical clamping block, the outside of the cylindrical clamping block is provided with an adaptive clamping assembly, the bottom of the cylindrical clamping block is detachably installed with a pressure head through the adaptive clamping assembly, and the pressure head can be pressed to fit the upper surface of the part.

[0006] Preferably, the inside of the device body is provided with a first hydraulic cylinder, and the output end of the first hydraulic cylinder is fixedly connected with the cylindrical clamping block.

[0007] Preferably, the adaptive clamping assembly comprises a second spring, an abutting plate and an abutting cylindrical rod, and the two sides of the outside of the cylindrical clamping block are symmetrically provided with clamping holes. The second spring is fixedly connected to the two sides of the outside of the cylindrical clamping block in a symmetrical manner, the abutting cylindrical rod is symmetrically and slidably connected in the clamping hole, the abutting plate is fixedly connected to the end of the abutting cylindrical rod, and one end of the second spring is fixedly connected with the abutting plate.

[0008] Preferably, the top of the pressure head is symmetrically provided with a containing cavity matched with the abutting cylindrical rod, the inside of the pressure head is fixedly connected with a hollow cylindrical rod on one side of each containing cavity, the hollow cylindrical rod is fixedly connected with a first spring, the end of the first spring is fixedly connected with a clamping block, the clamping block is slidably connected with the hollow cylindrical rod, and one end of the clamping block extends out of the outside of the pressure head and can be in contact with the end of the abutting cylindrical rod.

[0009] Preferably, the top of the mounting plate is fixedly connected with a fixing frame, the top of the fixing frame is rotatably connected with a second hydraulic cylinder, the square plate and the mounting plate are fixedly connected with a connecting rod, the outside of the connecting rod is rotatably connected with a circular rotating plate, and the output end of the second hydraulic cylinder is hingedly connected with the circular rotating plate.

[0010] Preferably, a plurality of second sliding grooves are radially arranged on the circular rotating plate. The bottom of the square plate is provided with a plurality of first sliding grooves corresponding to the sliding rods and slidably connected with the sliding rods, the bottom of each sliding rod is fixedly connected with a sliding cylindrical rod, and the sliding cylindrical rod extends into the corresponding second sliding groove and is slidably connected therewith.

[0011] Preferably, the outside of each clamping plate is fixedly connected with a bearing plate, the top of each bearing plate is fixedly connected with a fixed cylindrical rod, and the two ends of the third spring are respectively fixedly connected with the fixed cylindrical rods of the adjacent two clamping plates.

[0012] Preferably, the inner side wall of each clamping plate is fixedly connected with a plurality of fourth springs, the end of each fourth spring is fixedly connected with an elastic fixing plate, and the elastic fixing plate is slidably connected with the inner side wall of the clamping plate.

[0013] Preferably, the outside of the device body is rotatably connected to an openable and closable protective door via a hinge, and the outside of the device body is also slidably connected to a protective partition.

[0014] Preferably, a third sliding groove is provided on the outside of the device body, and a threaded rod is fixedly connected to the outside of the protective partition. The threaded rod is slidably connected to the third sliding groove, and a fixing nut is threaded to one end of the threaded rod that extends outside the device body. By tightening the fixing nut, it can be brought close to the outer wall of the device body to fix the protective partition.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This hydraulic clamp for machining parts in motor testing equipment comprises a clamping mechanism consisting of multiple radially distributed, bottom-hinged, and top-connected snap-fit ​​plates linked by a third spring. When a second hydraulic cylinder drives a circular rotating plate, the sliding cylindrical rod, in conjunction with a second sliding groove, forces all sliding rods to synchronously retract towards the center or expand outward. The presence of the third spring allows each snap-fit ​​plate to generate an independent fine-tuning displacement upon contact with the workpiece, ensuring that the clamping force is evenly distributed across multiple points on the workpiece's outer contour. This effectively avoids stress concentration caused by workpiece dimensional tolerances or irregular shapes, making it particularly suitable for the safe clamping of thin-walled or easily deformable parts.

[0016] 2. This hydraulic clamp for machining parts in motor testing equipment achieves rapid and reliable assembly and disassembly of the pressure head through a designed self-adaptive locking assembly combined with a first spring and locking block structure inside the pressure head. When replacing the pressure head, simply press the abutment plate inward to overcome the force of the second spring, causing the locking block to disengage from the locking hole. During installation, align the pressure head with the cylindrical locking block and push it upward; the locking block retracts under pressure and then springs back to lock into the locking hole under the action of the first spring. This modular design allows for quick replacement of different types of pressure heads according to processing requirements (such as flat clamping, V-groove positioning, etc.), improving the flexibility of the clamp and production efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the device in this invention; Figure 3 This is an enlarged structural diagram of point A in this invention; Figure 4 This is a schematic diagram of the pressure head assembly in this invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the pressure head assembly in this invention; Figure 6 This is a schematic diagram of the adaptive snap-fit ​​component in this invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the adaptive snap-fit ​​component in this invention; Figure 8 This is a schematic diagram of the bottom structure of the adaptive snap-fit ​​component in this invention; Figure 9 This is a schematic diagram of the snap-fit ​​plate in this invention.

[0019] In the diagram: 1. Device body; 2. Control switch; 3. Protective partition; 4. Protective door; 6. Mounting plate; 7. First hydraulic cylinder; 8. Cylindrical locking block; 9. Pressure head; 10. Hollow round rod; 11. First spring; 12. Locking block; 13. Second spring; 14. Abutment plate; 15. Abutment cylindrical rod; 17. Square plate; 18. Locking plate; 19. Sliding rod; 20. Third spring; 21. Fixing frame; 22. Second hydraulic cylinder; 23. First sliding groove; 24. Circular rotating plate; 25. Second sliding groove; 26. Sliding cylindrical rod; 27. Bearing plate; 28. Fourth spring; 29. ​​Elastic fixing plate; 30. Fixed round rod; 31. Third sliding groove; 32. Threaded rod; 33. Fixing nut. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example: Figures 1-9 As shown, the present invention provides a hydraulic clamp for processing parts of motor testing equipment, including a device body 1, and a control switch 2 is provided on the outside of the device body 1. The device body 1 is characterized in that: a mounting plate 6 is fixedly installed inside the device body 1, a square plate 17 is fixedly connected to the top of the mounting plate 6, and a plurality of radially distributed sliding rods 19 are slidably connected to the outer periphery of the square plate 17. Each sliding rod 19 is rotatably connected to a snap-fit ​​plate 18 by a hinge, and a third spring 20 is fixedly connected between the inner sidewalls of the snap-fit ​​plate 18. The third spring 20 can make the snap-fit ​​plate 18 adaptively conform to the outer contour of the part through the elastic force, so as to clamp and fix it. The device body 1 has a cylindrical snap-fit ​​block 8 inside and an adaptive snap-fit ​​component outside. The bottom of the cylindrical snap-fit ​​block 8 is detachably mounted with a pressure head 9 through the adaptive snap-fit ​​component. The pressure head 9 can press down to fit the upper surface of the component.

[0022] It should be noted that in this embodiment, the fixture constitutes the core radial adaptive clamping mechanism through the square plate 17, sliding rod 19, snap-fit ​​plate 18, and third spring 20. When the mechanism is activated, the multiple snap-fit ​​plates 18 can synchronously retract towards the center, and under the action of the third spring 20, each independently fine-tune its angle and position, thereby tightly and evenly conforming to the outer contour of irregular or easily deformable workpieces, achieving stable and damage-free flexible clamping. At the same time, the cylindrical snap-fit ​​block 8 and the detachable pressure head 9 provide an axial clamping function from above, forming a composite clamping solution for the workpiece.

[0023] The device body 1 is equipped with a first hydraulic cylinder 7, and the output end of the first hydraulic cylinder 7 is fixedly connected to the cylindrical snap-fit ​​block 8.

[0024] It should be noted that in this embodiment, the first hydraulic cylinder 7 serves as the power source for the axial clamping mechanism. The extension and retraction of its piston rod directly drives the cylindrical clamping block 8 and the pressure head 9 mounted at its bottom to move vertically. When the piston rod of the first hydraulic cylinder 7 extends, it pushes the pressure head 9 downward to press against the upper surface of the workpiece; when the piston rod retracts, the pressure head 9 lifts up, releasing the workpiece. This achieves automated control of the axial clamping and releasing of the workpiece.

[0025] The adaptive snap-fit ​​assembly includes a second spring 13, an abutment plate 14 and an abutment cylindrical rod 15, and snap-fit ​​holes are symmetrically opened on both sides of the outer side of the cylindrical snap-fit ​​block 8; The second spring 13 is symmetrically fixedly connected to both sides of the outer cylindrical snap block 8, and the abutting cylindrical rod 15 is symmetrically slidably connected in the snap hole. The abutting plate 14 is fixedly connected to the end of the abutting cylindrical rod 15, and one end of the second spring 13 is fixedly connected to the abutting plate 14.

[0026] It should be noted that, in this embodiment, the adaptive snap-fit ​​assembly is the key component for enabling the quick assembly and disassembly of the pressure head 9. In its natural state, the elastic force of the second spring 13 acts on the abutment cylindrical rod 15 through the abutment plate 14, causing it to tend to extend downwards. When it is necessary to disassemble the pressure head 9, pressing the abutment plates 14 on both sides inwards simultaneously overcomes the force of the second spring 13, thereby causing the abutment cylindrical rod 15 to retract upwards and release the lock on the pressure head 9.

[0027] The top of the pressure head 9 is symmetrically provided with receiving cavities that are adapted to the abutting cylindrical rod 15. A hollow cylindrical rod 10 is fixedly connected to one side of each receiving cavity inside the pressure head 9. A first spring 11 is fixedly connected inside the hollow cylindrical rod 10. A locking block 12 is fixedly connected to the end of the first spring 11. The locking block 12 is slidably connected to the hollow cylindrical rod 10, and one end of the locking block 12 extends out of the pressure head 9 and can contact the end of the abutting cylindrical rod 15.

[0028] It should be noted that in this embodiment, the locking block 12 and the first spring 11 inside the pressure head 9 constitute a locking mechanism. When installing the pressure head 9, align the locking hole of the pressure head 9 with the abutting cylindrical rod 15 at the bottom of the cylindrical locking block 8 and push it upwards. The inclined surface of the abutting cylindrical rod 15 will press the locking block 12, compressing the first spring 11 and causing it to retract into the hollow rod 10. When the pressure head 9 is in place, the locking block 12 quickly pops out under the elastic force of the first spring 11, locking the bottom of the abutting cylindrical rod 15, thus achieving a reliable connection between the pressure head 9 and the cylindrical locking block 8. For disassembly, press the abutting plate 14 to move the abutting cylindrical rod 15 upwards and disengage it from the locking block 12, and the pressure head 9 can be removed. This design enables quick replacement of the pressure head, adapting to different processing requirements.

[0029] A fixing frame 21 is fixedly connected to the top of the mounting plate 6. A second hydraulic cylinder 22 is rotatably connected to the top of the fixing frame 21. A connecting rod is fixedly connected between the square plate 17 and the mounting plate 6. A circular rotating plate 24 is rotatably connected to the outside of the connecting rod. The output end of the second hydraulic cylinder 22 is hinged to the circular rotating plate 24.

[0030] It should be noted that, in this embodiment, the second hydraulic cylinder 22, the fixed frame 21, and the circular rotating plate 24 together constitute the driving part of the radial clamping mechanism. The cylinder body of the second hydraulic cylinder 22 can swing around the hinge point on the fixed frame 21, and the extension and retraction motion of its piston rod is converted into the rotational motion of the circular rotating plate 24 around the central connecting rod through the hinge point. The circular protective shell 16 is used to prevent chips and coolant from entering the interior of the driving mechanism, thus providing protection.

[0031] The circular rotating plate 24 has multiple radially distributed second sliding grooves 25. The bottom of the square plate 17 is provided with a plurality of first sliding grooves 23 corresponding to and slidably connected to the sliding rods 19. The bottom of each sliding rod 19 is fixedly connected to a sliding cylindrical rod 26, which extends into the corresponding second sliding groove 25 and is slidably connected thereto.

[0032] It should be noted that, in this embodiment, the rotational motion of the circular rotating plate 24 is converted into the synchronous radial linear motion of all sliding rods 19 through the cooperation of the second sliding groove 25 and the sliding cylindrical rod 26. When the second hydraulic cylinder 22 drives the circular rotating plate 24 to rotate, the inclined surface of the second sliding groove 25 forces the sliding cylindrical rod 26 embedded therein to drive the sliding rods 19 to move synchronously in a centrifugal clamping or centrifugal releasing motion along the first sliding groove 23 on the square plate 17, thereby driving the top snap-fit ​​plate 18 to complete the clamping or releasing action of the workpiece.

[0033] Each of the snap-fit ​​plates 18 has a bearing plate 27 fixedly connected to its outer side, and a fixed round rod 30 fixedly connected to the top of each bearing plate 27. The two ends of the third spring 20 are respectively fixedly connected to the fixed round rods 30 of the two adjacent snap-fit ​​plates 18.

[0034] It should be noted that, in this embodiment, the support plate 27 and the fixed round rod 30 provide reliable mounting points for the third spring 20. This connection method allows the third spring 20 to effectively apply preload, connecting multiple snap-fit ​​plates 18 into a flexible whole. During clamping, the third spring 20 allows each snap-fit ​​plate 18 to independently undergo minute displacement and deflection according to the workpiece contour, ensuring uniform distribution of clamping force and avoiding local stress concentration that could damage the workpiece.

[0035] Multiple fourth springs 28 are fixedly connected to the inner sidewall of the snap-fit ​​plate 18. Each end of the fourth spring 28 is fixedly connected to an elastic fixing plate 29. The elastic fixing plate 29 is slidably connected to the inner sidewall of the snap-fit ​​plate 18.

[0036] It should be noted that in this embodiment, the fourth spring 28 and the elastic fixing plate 29 constitute a secondary buffer clamping surface. The elastic fixing plate 29 is in direct contact with the workpiece surface, and the fourth spring 28 can further absorb the impact and vibration during clamping, and provide a gentler and more uniform contact pressure. This buffer structure can effectively protect the workpiece surface, especially the machined surface or soft material workpiece, preventing indentations or scratches, and significantly improving the clamp's ability to protect precision workpieces.

[0037] The device body 1 is connected to an openable and closable protective door 4 via a hinge, and a protective partition 3 is also slidably connected to the outside of the device body 1.

[0038] It should be noted that, in this embodiment, the protective door 4 facilitates routine inspection, maintenance, and repair of the hydraulic components and mechanical structures inside the device body 1. The protective partition 3 plays an important safety protection role during the processing, effectively blocking the splashing of cutting fluid and chips, protecting the safety of operators, and maintaining a clean working environment.

[0039] The device body 1 has a third sliding groove 31 on its outside. The protective partition 3 is fixedly connected to a threaded rod 32. The threaded rod 32 is slidably connected to the third sliding groove 31. One end of the threaded rod 32 that extends out of the device body 1 is threadedly connected to a fixing nut 33. By tightening the fixing nut 33, it can be brought close to the outer wall of the device body 1 to fix the protective partition 3.

[0040] It should be noted that in this embodiment, the third sliding groove 31, the threaded rod 32, and the fixing nut 33 together constitute the height adjustment and locking mechanism of the protective partition 3. The operator can slide the protective partition 3 up and down to a suitable height according to the processing needs and the size of the workpiece, and then tighten the fixing nut 33 to press it against the outer wall of the device body 1, thereby firmly locking the protective partition 3 in this position, ensuring the effectiveness of protection and the flexibility of operation.

[0041] In summary, this hydraulic clamping fixture for machining parts in motor testing equipment involves selecting a suitable pressure head 9 based on the characteristics of the part being machined and installing it onto the cylindrical clamping block 8. The workpiece to be machined is initially placed in the fixture's working area. The second hydraulic cylinder 22 is activated via control switch 2, driving the radial clamping mechanism to adaptively clamp the workpiece's outer contour using the clamping plate 18. The first hydraulic cylinder 7 is then activated, driving the pressure head 9 downwards to axially clamp the workpiece. After confirming the workpiece is securely clamped, the required machining operation (such as milling or drilling) is performed. After machining is complete, the first hydraulic cylinder 7 is operated to release the axial clamping, and then the second hydraulic cylinder 22 is operated to release the radial clamping, allowing the machined workpiece to be removed.

[0042] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic clamp for processing parts in a motor testing device, comprising a device body (1), wherein a control switch (2) is provided on the outside of the device body (1), characterized in that: The device body (1) is fixedly installed with an installation plate (6). A square plate (17) is fixedly connected to the top of the installation plate (6). Multiple radially distributed sliding rods (19) are slidably connected to the outer periphery of the square plate (17). Each sliding rod (19) is rotatably connected to a snap-fit ​​plate (18) by a hinge. A third spring (20) is fixedly connected between the inner sidewalls of the snap-fit ​​plate (18). The third spring (20) can make the snap-fit ​​plate (18) adaptively conform to the outer contour of the component through elastic force, so as to clamp and fix it. The device body (1) is provided with a cylindrical snap-fit ​​block (8) inside, and an adaptive snap-fit ​​component is provided on the outside of the cylindrical snap-fit ​​block (8). A pressure head (9) is detachably installed on the bottom of the cylindrical snap-fit ​​block (8) through the adaptive snap-fit ​​component. The pressure head (9) can press down to fit the upper surface of the component.

2. The hydraulic fixture for machining parts in a motor testing equipment according to claim 1, characterized in that: The device body (1) is equipped with a first hydraulic cylinder (7), and the output end of the first hydraulic cylinder (7) is fixedly connected to the cylindrical snap-fit ​​block (8).

3. The hydraulic fixture for machining parts in a motor testing equipment according to claim 2, characterized in that: The adaptive snap-fit ​​assembly includes a second spring (13), an abutment plate (14), and an abutment cylindrical rod (15). The cylindrical snap-fit ​​block (8) has snap-fit ​​holes symmetrically opened on both sides of its outer surface. The second spring (13) is symmetrically fixedly connected to both sides of the cylindrical snap block (8), the abutting cylindrical rod (15) is symmetrically slidably connected in the snap hole, the abutting plate (14) is fixedly connected to the end of the abutting cylindrical rod (15), and one end of the second spring (13) is fixedly connected to the abutting plate (14).

4. The hydraulic fixture for machining parts in a motor testing equipment according to claim 3, characterized in that: The top of the pressure head (9) is symmetrically provided with receiving cavities that are adapted to the abutting cylindrical rod (15). A hollow cylindrical rod (10) is fixedly connected to one side of each receiving cavity inside the pressure head (9). A first spring (11) is fixedly connected inside the hollow cylindrical rod (10). A snap-fit ​​block (12) is fixedly connected to the end of the first spring (11). The snap-fit ​​block (12) is slidably connected to the hollow cylindrical rod (10), and one end of the snap-fit ​​block (12) extends out of the pressure head (9) and can contact the end of the abutting cylindrical rod (15).

5. A hydraulic fixture for machining parts in a motor testing equipment according to claim 4, characterized in that: A fixing frame (21) is fixedly connected to the top of the mounting plate (6), and a second hydraulic cylinder (22) is rotatably connected to the top of the fixing frame (21). A connecting rod is fixedly connected between the square plate (17) and the mounting plate (6), and a circular rotating plate (24) is rotatably connected to the outside of the connecting rod. The output end of the second hydraulic cylinder (22) is hinged to the circular rotating plate (24).

6. A hydraulic fixture for machining parts in a motor testing equipment according to claim 5, characterized in that: The circular rotating plate (24) has multiple radially distributed second sliding grooves (25). The bottom of the square plate (17) is provided with a plurality of first sliding grooves (23) corresponding to and slidably connected to the sliding rods (19). The bottom of each sliding rod (19) is fixedly connected to a sliding cylindrical rod (26), which extends into the corresponding second sliding groove (25) and is slidably connected to it.

7. A hydraulic fixture for machining parts in a motor testing equipment according to claim 6, characterized in that: Each of the snap-fit ​​plates (18) is symmetrically fixedly connected to a bearing plate (27), and each of the bearing plates (27) is fixedly connected to a fixed round rod (30) on its top. The two ends of the third spring (20) are respectively fixedly connected to the fixed round rods (30) of the two adjacent snap-fit ​​plates (18).

8. A hydraulic fixture for machining parts in a motor testing equipment according to claim 7, characterized in that: The inner sidewall of the snap-fit ​​plate (18) is fixedly connected with a plurality of fourth springs (28), and the ends of the fourth springs (28) are fixedly connected with elastic fixing plates (29). The elastic fixing plates (29) are slidably connected to the inner sidewall of the snap-fit ​​plate (18).

9. A hydraulic fixture for machining parts in a motor testing equipment according to claim 8, characterized in that: The device body (1) is rotatably connected to an openable protective door (4) via a hinge, and a protective partition (3) is also slidably connected to the outside of the device body (1).

10. A hydraulic fixture for machining parts in a motor testing equipment according to claim 9, characterized in that: The device body (1) has a third sliding groove (31) on its outside. The protective partition (3) is fixedly connected to a threaded rod (32). The threaded rod (32) is slidably connected to the third sliding groove (31). The end of the threaded rod (32) extending out of the device body (1) is threadedly connected to a fixing nut (33). By tightening the fixing nut (33), it can be brought close to the outer wall of the device body (1) to fix the protective partition (3).

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