Electric drive axle test run loading tool lifting appliance

Abstract

The utility model discloses an electric drive axle test run loading tool lifting appliance, which belongs to the technical field of lifting equipment, and comprises a connecting shaft, one end of the connecting shaft is provided with a clamping hook, the other end of the connecting shaft is provided with a clamping body structure, the clamping body structure comprises a clamping arm I and a clamping arm II, and the clamping arm I and the clamping arm II have the same shape, are oppositely arranged and can be matched to form the clamping body structure; the clamping body structure further comprises a spring bolt capable of limiting the maximum opening angle of the clamping body structure. When the connecting shaft is in a horizontal state, the bottom of the clamping body structure is lower than the bottom of the clamping hook, the clamping body structure and the clamping hook are matched to be connected with the two ends of the electric drive axle tool body, and the axis of the electric drive axle tool body is kept parallel to the connecting shaft. When the connecting shaft is in a horizontal state, quick clamping of the tool body can be achieved, manual adjustment time and operation difficulty are reduced, horizontal hoisting of the axis of the tool body is kept, optimization of load distribution is facilitated, local stress concentration is avoided, and the damage risk is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of hoisting equipment technology, specifically a loading tool for electric drive bridge test runs. Background Technology

[0002] An electric drive axle is a core drive component for electric vehicles (EVs) and hybrid electric vehicles (HEVs). By integrating a motor, reducer, and differential, it achieves efficient power transmission. As a type of drive axle, the electric drive axle replaces the engine and transmission in traditional gasoline vehicles. Its main functions include: power transmission, transferring motor torque to the wheels through the reducer and differential to achieve speed reduction and torque increase; differential operation, ensuring that the wheels on both sides rotate at different speeds when the vehicle is turning; and energy management, optimizing power distribution through intelligent algorithms to improve range and energy efficiency.

[0003] Electric drive axles, through integrated design and efficient power management, have become one of the core technologies for new energy commercial vehicles, especially in terms of significantly improving driving range, reducing energy consumption, and optimizing space. In the future, as the technology matures and costs decrease, its application scenarios will further expand, driving the commercial vehicle industry towards a greener and more efficient transformation.

[0004] The rapid development of heavy-duty new energy vehicles has placed higher demands on electric drive axles. Each electric drive axle needs to undergo off-line testing. To better simulate actual road conditions, loading tests need to be conducted on the off-line electric drive axles. Therefore, it is necessary to design an electric drive axle test loading fixture to achieve rapid clamping and unloading of loading fixtures.

[0005] Currently, the electric drive axle tooling body is a variable diameter shaft structure. One end has a large disc-shaped structure with evenly distributed through holes, while the other end is a shaft structure. Existing lifting devices cannot form a parallel axis of the shaft structure of the electric drive axle tooling body, which increases the difficulty of tooling loading and is prone to damaging the tooling sample. Utility Model Content

[0006] To address the problem that the axis of the electric drive axle fixture cannot be parallel to the ground during hoisting, leading to difficulties in loading operations and easy damage, this utility model provides a loading fixture for electric drive axle testing.

[0007] This utility model is achieved through the following technical solution:

[0008] A loading fixture for electric drive axle testing includes a connecting shaft. One end of the connecting shaft is provided with a hook, and the other end of the connecting shaft is provided with a clamping structure. The clamping structure includes a first clamping arm and a second clamping arm. The first clamping arm and the second clamping arm are identical in shape, arranged opposite each other, and can cooperate to form the clamping structure. The clamping structure also includes a locking tongue that can limit the maximum opening angle of the second clamping arm and the first clamping arm. When the connecting shaft is in a horizontal state, the bottom of the clamping structure is lower than the bottom of the hook, and the clamping structure and the hook can cooperate to connect with both ends of the electric drive axle fixture body and keep the axis of the electric drive axle fixture body parallel to the connecting shaft.

[0009] The tooling body is connected to a disc-shaped through hole at one end via a hook. The other end is adjusted to open the clamping structure and engage with the shaft at the other end to complete the clamping. The arc-shaped structures of clamping arms one and two can be adapted to the variable-diameter shaft of the tooling body to ensure a close fit of the clamping surfaces. The locking tongue can limit the maximum angle and prevent excessive opening that could lead to clamping failure. When the connecting shaft is in a horizontal state, the tooling body can be quickly clamped, reducing manual adjustment time and operational difficulty. Maintaining the horizontal lifting of the tooling body's axis helps optimize load distribution, avoid localized stress concentration, and reduce the risk of damage.

[0010] A further improvement of this utility model is that the aforementioned clamping structure also includes a second connecting plate, which is a U-shaped structure with its opening facing downwards. The lower end of the second connecting plate is connected to the top ends of the first and second clamping arms. The locking tongue is rotatably mounted on the second connecting plate via a rotating shaft. The second connecting plate allows the clamping structure to adapt to the variable-diameter shaft end of the electric drive bridge tooling body, thus improving the clamping fit between the clamping structure and the variable-diameter shaft end. Since the improved fit between the clamping structure and the variable-diameter shaft end is achieved by supplementing the length of the second connecting plate, it is equivalent to improving the overall structural strength of the clamping structure. The locking tongue rotates flexibly via the rotating shaft, improving the ease of operation of the locking tongue component.

[0011] A further improvement of this invention is that the top end of the second clamping arm is rotatably mounted on the lower end of the second connecting plate via the second rotating shaft. Both the second clamping arm and the first clamping arm are located at the lower end of the second connecting plate, forming an almost symmetrical arrangement, which helps to improve the dynamic adjustment capability of the entire clamping structure.

[0012] A further improvement of this invention is that the second connecting plate is rotatably mounted on the connecting shaft. This rotatable mounting of the second connecting plate on the connecting shaft allows the clamping structure to self-adjust as the electric drive bridge tooling body undergoes hoisting, ensuring that the axis of the tooling body and the connecting shaft remain horizontal during hoisting.

[0013] A further improvement of this utility model is that the aforementioned locking arm two is provided with several locking notches that can cooperate with the locking tongue. The several locking notches and the locking tongue form multiple angles, improving the adaptability of the clamping structure during use.

[0014] A further improvement of this utility model is that a pressure plate is provided above the aforementioned locking arm one, and the pressure plate is connected to the hinge end of the locking tongue. By setting the pressure plate, the locking tongue and the pressure plate can be positioned on both sides of the connecting plate two during the opening and closing of the locking tongue, improving operational convenience and expanding the operating field of vision.

[0015] A further improvement of this utility model is that a compression spring is provided between the bottom surface of the pressure plate and the first locking arm, which can push the locking tongue to press against the second locking arm. The compression spring provides a continuous preload to the pressure plate, ensuring close contact between the locking tongue and the locking notch, and supplementing the clamping force of the clamping structure; secondly, the compression spring can automatically reset after the external force of the opening operation of the locking tongue is released, reducing manual intervention.

[0016] A further improvement of this utility model is that a support plate is provided on the connecting plate two below the pressure plate, and the top surface of the support plate is connected to the compression spring. The support plate forms a support at the bottom of the compression spring, which optimizes the structural layout and increases the force exertion space of the compression spring.

[0017] A further improvement of this utility model is that one end of the connecting shaft is connected to the hook via a connecting plate; the connecting plate is vertically arranged, with its upper part connected to the connecting shaft and its lower part connected to the hook, and the connecting shaft and the hook located on opposite sides of the connecting plate. The hook connects to the connecting shaft via the connecting plate, and the hook is lower than the height of the connecting shaft in the vertical space during use, thus forming a clamping structure at the other end of the connecting shaft to maintain the balanced force of the lifting device structure.

[0018] A further improvement of this invention is that a lifting ring is provided on the connecting shaft, and the lifting ring is located between the hook and the clamping structure. The lifting ring facilitates the establishment of a lifting point for the lifting device.

[0019] As can be seen from the above technical solution, the beneficial effects of this utility model are as follows: the hook connects to the disc-shaped through hole at one end of the electric drive bridge tooling body, and the clamping structure at the other end is adjusted to open and cooperate with the shaft at the other end to complete the clamping. The arc-shaped structure of the first and second clamping arms can be adapted to the variable diameter shaft part of the tooling body to ensure the fit of the clamping surface. The locking tongue can limit the maximum angle and prevent excessive opening that could lead to clamping failure. When the connecting shaft is in a horizontal state, the tooling body can be quickly clamped, reducing manual adjustment time and operation difficulty. Maintaining the horizontal lifting of the axis of the tooling body helps to optimize load distribution, avoid local stress concentration, and reduce the risk of damage. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a first structural schematic diagram of a specific embodiment of the present utility model.

[0022] Figure 2 This is a second structural schematic diagram of a specific embodiment of the present utility model.

[0023] In the attached diagram: 10, connecting shaft; 11, lifting ring; 20, connecting plate one; 21, hook; 30, connecting plate two; 31, clamping arm one; 311, extension section; 312, clamping section; 313, supporting section; 32, clamping arm two; 321, locking notch; 33, rotating shaft two; 40, locking tongue; 41, rotating shaft one; 42, pressure plate; 43, supporting plate; 44, compression spring; 50, electric drive bridge tooling body. Detailed Implementation

[0024] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0025] like Figures 1-2 As shown, this utility model discloses a lifting fixture for loading and unloading an electric drive axle during testing, including a connecting shaft 10 with a lifting ring 11 on it. The lifting ring 11 facilitates the formation of a lifting point for the fixture. One end of the connecting shaft 10 is provided with a hook 21, and the other end is provided with a clamping structure, which includes a first clamping arm 31 and a second clamping arm 32. The first clamping arm 31 and the second clamping arm 32 are identical in shape, arranged opposite each other, and can cooperate to form the clamping structure. The clamping structure also includes a locking tongue 40 that can limit its maximum opening angle. When the connecting shaft 10 is in a horizontal state, the bottom of the clamping structure is lower than the bottom of the hook 21, and the clamping structure and the hook 21 can connect to both ends of the electric drive axle fixture body 50 and keep the axis of the electric drive axle fixture body 50 parallel to the connecting shaft 10. The first clamping arm 31 and the second clamping arm 32 are both arc-shaped structures that can cooperate to clamp and support each other.

[0026] The tooling body 50 is connected to a disc-shaped through hole at one end by a hook. The other end is adjusted to open the clamping structure and cooperate with the shaft at the other end to complete the clamping. The arc-shaped structure of clamping arm 31 and clamping arm 32 can be adapted to the variable diameter shaft of the tooling body to ensure the fit of the clamping surface. The locking tongue 40 can limit the maximum angle to prevent excessive opening and clamping failure. When the connecting shaft 10 is in a horizontal state, this structure can realize the quick clamping operation of the tooling body, reduce the manual adjustment time and operation difficulty, keep the axis of the tooling body horizontally lifted, help optimize the load distribution, avoid local stress concentration, and reduce the risk of damage.

[0027] The lifting ring 11 has a plate-like structure with a hook hole at the top for easy hooking and a through hole at the bottom for the connecting shaft 10 to pass through and be fitted. The plate-like structure of the lifting ring 11 has a thickness of 10mm-15mm. The connecting shaft 10 has scale lines for positioning reference when the lifting ring 11 slides along it. The lifting ring 11 is located between the hook 21 and the clamping structure.

[0028] The clamping structure also includes a second connecting plate 30, which is a U-shaped structure with its opening facing downwards. The lower end of the second connecting plate 30 is connected to the top ends of the first clamping arm 31 and the second clamping arm 32. The first clamping arm 31 is fixedly connected to the second connecting plate 30, and the connection method can be welding or integral molding. The locking tongue 40 is rotatably mounted on the second connecting plate 30 via a first rotating shaft 41. The top end of the second clamping arm 32 is rotatably mounted on the lower end of the second connecting plate 30 via a second rotating shaft 33. The second clamping arm 32 and the first clamping arm 31 are both located at the lower end of the second connecting plate 30, forming an almost symmetrical arrangement, which helps to improve the dynamic adjustment capability of the entire clamping structure. The second connecting plate 30 is designed to accommodate the clamping structure's ability to grip the variable-diameter shaft end of the electric drive bridge tooling body 50, thus improving the clamping fit between the clamping structure and the variable-diameter shaft end. Since the improved fit between the clamping structure and the variable-diameter shaft end is achieved by supplementing the length of the second connecting plate 30, it is equivalent to improving the overall structural strength of the clamping structure. The locking tongue 40 rotates flexibly via the first rotating shaft 41, improving the ease of operation of the locking tongue 40 component.

[0029] The second connecting plate 30 is rotatably mounted on the connecting shaft 10. The rotatable mounting of the second connecting plate 30 on the connecting shaft 10 allows the clamping structure to adaptively adjust as the electric drive bridge tooling body 50 is hoisted, keeping the axis of the tooling body and the connecting shaft 10 horizontal during the hoisting process.

[0030] One end of the connecting shaft (10) is connected to the hook (21) via a connecting plate (20). The connecting plate (20) is vertically arranged, with its upper part connected to the connecting shaft (10) and its lower part connected to the hook (21). The connecting shaft (10) and the hook (21) are located on opposite sides of the connecting plate (20). The hook 21 is connected to the connecting shaft 10 via the connecting plate (20), and the hook 21 is lower than the height of the connecting shaft 10 in vertical space during use, thus forming a clamping structure at the other end of the connecting shaft 10 to maintain the balanced force of the lifting device structure.

[0031] The hook 21 is cylindrical in shape. At the end of the cylindrical structure away from the connecting shaft 10, there is an anti-detachment boss. The diameter of the anti-detachment boss is larger than the diameter of the cylindrical structure and smaller than the diameter of the through hole of the disc-shaped structure of the electric drive bridge tooling body 50.

[0032] The second locking arm 32 is provided with several locking notches 321 that can cooperate with the locking tongue 40. The several locking notches 321 and the locking tongue 40 form multiple angles, which improves the adaptability of the clamping structure during use.

[0033] A pressure plate 42 is provided above the locking arm 31, and the pressure plate 42 is connected to the hinge end of the locking tongue 40. By setting the pressure plate 42, the locking tongue 40 and the pressure plate 42 can be arranged on both sides of the connecting plate 30 during the operation of opening and closing the locking tongue 40, which improves the convenience of operation and widens the operating field of vision.

[0034] A compression spring 44 is provided between the bottom surface of the pressure plate 42 and the first locking arm 31, which can push the locking tongue 40 to press against the second locking arm 32. The compression spring 44 provides a continuous preload to the pressure plate 42, ensuring that the locking tongue 40 is in close contact with the locking notch 321, thereby enhancing the clamping force of the clamping structure. In addition, when the external force is released, the compression spring 44 can drive the locking tongue 40 to automatically reset, reducing manual intervention.

[0035] A support plate 43 is provided on the connecting plate 30 below the pressure plate 42, and the top surface of the support plate 43 is connected to the compression spring 44. The support plate 43 forms a support at the bottom of the compression spring 44, which optimizes the structural layout and increases the force exertion space of the compression spring 44.

[0036] The connecting plate 2 30, the clamping arm 1 31 and the clamping arm 2 32 are all double-layer plate structures, and reinforcing ribs are provided between the double-layer plates; the clamping arm 2 32 is embedded in the interlayer of the connecting plate 2 30 through the rotating shaft 2 33.

[0037] The clamping arm 31 includes an extension section 311 connected to the connecting plate 30. The end of the extension section 311 away from the connecting plate 30 has a downwardly extending clamping section 312. The end of the clamping section 312 away from the extension section 311 is connected to a supporting section 313. The extension section 311 and the supporting section 313 are symmetrically arranged at both ends of the clamping section 312, and both the extension section 311 and the supporting section 313 form an angle with the clamping section 312. This angle design helps to improve the structural strength of the clamping arm 31. The structure of the clamping arm 32 is the same as that of the clamping arm 31. After the clamping arms 31 and 32 are connected to one end of the shaft of the electric drive axle tooling body, the clamping structure is clamped under the weight of the electric drive axle tooling body.

[0038] This utility model discloses a loading fixture for electric drive axle testing. A hook connects to a disc-shaped through-hole at one end of the fixture body, while the other end's clamping structure opens and engages with the shaft at the other end for clamping. The arc-shaped structures of clamping arms one and two can adapt to the variable-diameter shaft portion of the fixture body, ensuring a close fit of the clamping surfaces. The locking tongue limits the maximum angle, preventing excessive opening and clamping failure. When the connecting shaft is horizontal, it enables rapid clamping of the fixture body, reducing manual adjustment time and operational difficulty. Maintaining horizontal lifting of the fixture body's axis helps optimize load distribution, avoids localized stress concentration, and reduces the risk of damage.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A loading fixture for electric drive bridge test runs, comprising a connecting shaft (10), characterized in that, One end of the connecting shaft (10) is provided with a hook (21), and the other end of the connecting shaft (10) is provided with a clamping structure. The clamping structure includes a first clamping arm (31) and a second clamping arm (32). The first clamping arm (31) and the second clamping arm (32) have the same shape, are arranged opposite to each other, and can cooperate to form a clamping structure. The clamping structure also includes a locking tongue (40) that can limit its maximum opening angle. When the connecting shaft (10) is in a horizontal state, the bottom of the clamping structure is lower than the bottom of the hook (21), and the clamping structure and the hook (21) can cooperate to connect with both ends of the electric drive bridge tooling body (50) and keep the axis of the electric drive bridge tooling body (50) parallel to the connecting shaft (10).

2. The electric drive axle test loading fixture according to claim 1, characterized in that, The clamping structure also includes a second connecting plate (30), which is a U-shaped structure with the opening facing downwards. The lower end of the second connecting plate (30) is connected to the top end of the first locking arm (31) and the second locking arm (32). The locking tongue (40) is rotatably mounted on the second connecting plate (30) via a first rotating shaft (41).

3. The electric drive axle test loading fixture according to claim 2, characterized in that, The top end of the second clamping arm (32) is rotatably mounted on the lower end of the second connecting plate (30) via the second rotating shaft (33).

4. The electric drive axle test loading fixture according to claim 2, characterized in that, The second connecting plate (30) is rotatably mounted on the connecting shaft (10).

5. A loading fixture for electric drive bridge testing according to any one of claims 1 to 4, characterized in that, The second locking arm (32) is provided with several locking notches (321) that can cooperate with the locking tongue (40).

6. The electric drive axle test loading fixture according to claim 5, characterized in that, A pressure plate (42) is provided above the first locking arm (31), and the pressure plate (42) is connected to the hinge end of the locking tongue (40).

7. The electric drive axle test loading fixture according to claim 6, characterized in that, A compression spring (44) is provided between the bottom surface of the pressure plate (42) and the first locking arm (31) to push the locking tongue (40) to press against the second locking arm (32).

8. The electric drive axle test loading fixture according to claim 7, characterized in that, A support plate (43) is provided on the connecting plate 2 (30) below the pressure plate (42), and the top surface of the support plate (43) is connected to the compression spring (44).

9. A loading fixture for electric drive bridge testing according to any one of claims 1 to 4, characterized in that, One end of the connecting shaft (10) is connected to the hook (21) via the connecting plate (20); the connecting plate (20) is vertically arranged, the upper part of the connecting plate (20) is connected to the connecting shaft (10), and the lower part of the connecting plate (20) is connected to the hook (21). The connecting shaft (10) and the hook (21) are located on opposite sides of the connecting plate (20).

10. A loading fixture for electric drive bridge testing according to any one of claims 1 to 4, characterized in that, The connecting shaft (10) is provided with a lifting ring (11), which is located between the hook (21) and the clamping structure.

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