Gear hub transfer tool

Abstract

The utility model relates to a kind of gear hub transfer frock, including, lifting ring, fixed lifting arm and movable arm;Fixed lifting arm includes two hangers and two fixed clamping parts;The upper end of two hangers is connected with lifting ring, and lower end is connected with the outer end of fixed clamping part;The upper side of lifting ring is vertically fixed with handle;Lifting ring is located at the both sides of handle respectively as fixed side and rotating side, and fixed side is fixed with the upper end of hanger and is connected;Movable arm includes movable hanger and movable clamping part, and the upper end of movable hanger is rotatably connected with rotating side, and rotating side is located at the both sides of upper end and is provided with dynamic restraint device, for limiting the upper end of movable hanger along its rotating shaft axial movement, and the lower end of movable hanger is connected with the outer end of movable clamping part;Lifting ring is horizontally arranged;Then the upper wall of fixed clamping part is located in the same horizontal plane, and the vertical distance between lifting ring is L1;The vertical distance between the upper wall of movable clamping part and lifting ring is L2 when being in horizontal state, and L2=L1.

Description

Technical Field

[0001] This utility model relates to a workpiece transfer device, specifically a gear hub transfer fixture. Background Technology

[0002] In the automotive manufacturing industry, gear hubs, as key transmission components, are large and heavy, and lack dedicated fixtures. Currently, manual handling or the use of general-purpose fixtures is commonly used for gear hub transfer, which presents the following problems: manual handling is labor-intensive and easily leads to operator fatigue; while using general-purpose fixtures requires repeated positioning adjustments, resulting in low transfer efficiency, a high risk of workpiece surface scratches, and a potential for disengagement. To address these issues, Chinese patent CN212832401U discloses a three-jaw fixture for transferring annular blanks. It modifies the existing clamp structure into a three-jaw structure, utilizing the principle of three points determining the center of a circle, enabling one-time alignment and clamping. This optimizes the crane operator's operation steps and eliminates the lifting and lowering operation of the crane's auxiliary hook. However, it still has the following drawbacks: firstly, it must be used in conjunction with a crane, making it unsuitable for scenarios without mechanical lifting; secondly, the clamping area lacks an effective anti-scratch layer, making the workpiece surface easily scratched during transfer. Utility Model Content

[0003] The purpose of this utility model is to solve the technical problems of existing transfer fixtures that must rely on hoisting equipment for handling and that the workpiece surface is easily damaged during the transfer process, and to provide a gear hub transfer fixture.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A gear hub transfer fixture, characterized in that it includes a lifting ring, a fixed lifting arm, and a movable arm;

[0006] The fixed boom includes two booms and two fixed clamping parts; the upper ends of the two booms are connected to lifting rings, and the lower ends are respectively connected to the outer end of one of the fixed clamping parts.

[0007] A handle is vertically fixed to the upper side of the lifting ring; the two sides of the lifting ring on the handle are a fixed side and a rotating side, respectively, and the fixed side is fixedly connected to the upper end of the lifting rod.

[0008] The movable arm includes a movable boom and a movable clamping part. The upper end of the movable boom is rotatably connected to the rotating side, and dynamic constraint devices are provided on both sides of the upper end of the rotating side to restrict the upper end of the movable boom from moving axially along its rotation axis. The lower end of the movable boom is connected to the outer end of the movable clamping part.

[0009] Define the lifting ring as horizontal; then: the upper wall of the fixed clamping part is located in the same horizontal plane, and the vertical distance between it and the lifting ring is L1; when the upper wall of the movable clamping part is in a horizontal state, the vertical distance between it and the lifting ring is L2, and L2 = L1.

[0010] Furthermore, the boom includes a fixed rod and a support rod; the inner end of the fixed rod is connected to the fixed side, its outer end is connected to the upper end of the support rod, and the lower end of the support rod is connected to the outer end of the fixed clamping part.

[0011] The movable boom includes a rotating part and a connecting part; the inner end of the rotating part is rotatably connected to the rotating side, and dynamic constraint devices are provided on both sides of the upper end of the rotating side to restrict the upper end of the movable boom from moving axially along its rotation axis; the outer end of the rotating part is connected to the upper end of the connecting part, and the lower end of the connecting part is connected to the outer end of the movable clamping part.

[0012] Furthermore, the angle between the upper end of the support rod and the outer end of the fixed rod is an obtuse angle, and the angle between its lower end and the outer end of the fixed clamping part is a right angle.

[0013] The angle between the upper end of the connecting part and the outer end of the rotating part is obtuse, and the angle between its lower end and the outer end of the movable clamping part is right.

[0014] Furthermore, the inner ends of the two fixing rods are cross-fixed at a point, and their cross-section is connected to the fixing side.

[0015] Furthermore, a crossbar perpendicular to the fixed rods is provided between the two fixed rods, and the number of crossbars is ≥1.

[0016] Furthermore, the length of the fixed clamping part is equal to the length of the movable clamping part.

[0017] Furthermore, the central axes of both the fixed clamping parts and the movable clamping parts point towards the central axis of the lifting ring.

[0018] Furthermore, the dynamic constraint device is a shim or an elastic retaining ring, which is vertically arranged, and the distance between the two is adapted to the upper diameter of the movable rod.

[0019] Furthermore, both the fixed clamping part and the movable clamping part are provided with a brass anti-scratch layer with a thickness of 3mm and a tolerance of ±0.1mm.

[0020] Furthermore, the lifting ring, fixed boom, and movable boom are all made of Q235 carbon structural steel.

[0021] The advantages of this utility model compared to the prior art are as follows:

[0022] 1. This utility model discloses a gear hub transfer fixture that achieves self-locking and anti-disengagement through the linkage design of the fixed boom and the movable boom. When lifted, the gear hub to be transferred is subjected to gravity, which automatically triggers the centripetal clamping force, forming a self-locking effect of "the more you lift, the tighter it becomes", which completely avoids the safety hazard of the gear hub falling off during the transfer process and effectively ensures the normal transfer of the gear hub. Because of the self-locking effect, this gear hub transfer fixture can be used for manual handling or mechanical hoisting.

[0023] 2. The present invention provides a gear hub transfer fixture with a segmented lifting rod design, which ensures overall rigidity and allows the movable arm to have independent rotational freedom, making it easy to quickly adapt to the clamping requirements of gear hubs of different sizes.

[0024] 3. The two fixing rods of the gear hub transfer fixture of this utility model are cross-fixed at one point, which concentrates the force to the fixing side of the lifting ring, significantly improving the overall structural strength of the fixture, and is suitable for heavy gear hub transfer.

[0025] 4. The gear hub transfer fixture of this utility model adopts a crossbar to vertically connect two fixed rods, providing reverse tensile force constraint, effectively suppressing the outward opening tendency of the boom under load, and ensuring clamping stability.

[0026] 5. The gear hub transfer fixture of this utility model adopts a design with the fixed clamping part and the movable clamping part of equal length, so that the three clamping points form symmetrical support for the gear hub, avoiding workpiece displacement due to uneven force; at the same time, the central axis of the clamping part is pointed to the center of the lifting ring, ensuring that the gravity component is accurately converted into centripetal clamping force when lifting, and enhancing the reliability of the self-locking effect.

[0027] 6. The present invention provides a gear hub transfer fixture that restricts the axial movement of the movable arm along its rotation axis through a dynamic constraint device, while retaining the circumferential rotational degree of freedom to prevent workpiece displacement caused by vibration.

[0028] 7. The gear hub transfer fixture of this utility model adopts a brass anti-scratch layer with a hardness significantly lower than that of the gear hub surface. Through the hardness gradient protection mechanism, the risk of scratching the gear hub surface during the transfer process is completely eliminated. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of the gear hub transfer tool of this utility model;

[0030] Figure 2 This is a front view of an embodiment of the present utility model;

[0031] Figure 3 for Figure 2 The right view;

[0032] Figure 4 This is a three-dimensional structural diagram of the lifting ring, handle, and gasket in an embodiment of this utility model;

[0033] Figure 5 This is a front view of the lifting ring, handle, and gasket in an embodiment of this utility model;

[0034] Figure 6 for Figure 5 The right view;

[0035] Figure 7 This is a schematic diagram of the structure of the fixed boom in an embodiment of this utility model;

[0036] Figure 8 This is a schematic diagram of the movable arm in an embodiment of the present invention;

[0037] Figure 9 This is a reference diagram showing the usage state of the gear hub to be transferred in an embodiment of this utility model;

[0038] Figure 10 This is a reference diagram showing another perspective of the usage state of clamping the gear hub to be transferred according to an embodiment of this utility model.

[0039] Among them, 1-lifting ring, 2-fixed boom, 3-movable boom, 4-dynamic restraint device, 12-handle, 21-fixed rod, 22-support rod, 23-fixed clamping part, 24-crossbar, 31-rotating part, 32-connecting part, 33-movable clamping part, 41-shield. Detailed Implementation

[0040] To better understand the purpose, structure, and function of this utility model, the following detailed description of a gear hub transfer fixture proposed by this utility model is provided in conjunction with the accompanying drawings and embodiments.

[0041] like Figure 1-3As shown, a gear hub transfer fixture includes a lifting ring 1, a fixed lifting arm 2, a movable arm 3, a dynamic constraint device 4, and a handle 12. The fixed lifting arm 2 is made of Q235 carbon structural steel and includes two lifting rods and two fixed clamping parts 23. The upper ends of the two lifting rods are connected to the lifting ring 1, and the lower ends of the two lifting rods are respectively connected to the outer end of a fixed clamping part 23. A handle 12 is vertically fixed to the upper side of the lifting ring 1. The lifting ring 1 is located on the fixed side and the rotating side on both sides of the handle 12, and the fixed side is fixedly connected to the upper end of the lifting rod. The movable arm 3 is made of Q235 carbon structural steel. The device comprises a movable lifting rod and a movable clamping part 33. The upper end of the movable lifting rod is rotatably connected to the rotating side, and dynamic constraint devices 4 are provided on both sides of the upper end of the rotating side to restrict the axial movement of the upper end of the movable lifting rod along its rotation axis. The lower end of the movable lifting rod is connected to the outer end of the movable clamping part 33. The lifting ring 1 is defined as being horizontally positioned. Then, the upper wall surface of the fixed clamping part 23 is located in the same horizontal plane, and the vertical distance between it and the lifting ring 1 is L1. When the upper wall surface of the movable clamping part 33 is in a horizontal state, the vertical distance between it and the lifting ring 1 is L2, and L2 = L1. In use, clamp the fixed clamping part 23 at the bottom of the gear hub to be transferred, then rotate and adjust the angle of the movable arm 3 to lock the movable clamping part 33 to the bottom of the gear hub to be transferred. Pull the handle 12 upward, and the fixed lifting arm 2 and the movable arm 3 will trigger a self-locking state. During the lifting process, the components generate a centripetal clamping force to achieve a self-locking effect of "the more you lift, the tighter it gets" and avoid the phenomenon of disengagement.

[0042] like Figure 4-6 As shown, the lifting ring 1 is made of Q235 carbon structural steel. A handle 12 is vertically fixed to the upper side of the lifting ring 1. The two sides of the lifting ring 1 on the handle 12 are the fixed side and the rotating side, respectively. A dynamic constraint device 4 is provided on the rotating side. The dynamic constraint device 4 consists of two shims 41 fixedly sleeved on the rotating side. The distance between the two shims 41 is adapted to the width of the upper end of the movable rod along its rotation axis.

[0043] In another embodiment, the dynamic constraint device 4 may use an elastic retaining ring instead of the gasket 41.

[0044] like Figure 7As shown, the lifting rod includes a fixed rod 21 and a support rod 22. The inner end of the fixed rod 21 (i.e., the upper end of the lifting rod) is fixedly connected to the fixed side on the lifting ring 1. The outer end of the fixed rod 21 is connected to the upper end of the support rod 22 at an obtuse angle. The lower end of the support rod 22 (i.e., the lower end of the lifting rod) is connected to the outer end of the fixed clamping part 23 at a right angle. The two fixed clamping parts 23 are located on the same horizontal plane. The fixed clamping part 23 is used to support the gear hub to be transferred. The fixed clamping part 23 is provided with a brass anti-scratch layer to prevent the gear hub from being scratched. Its thickness is 3mm and the tolerance is ±0.1mm. According to the hardness test (GB / T4340.1), the Vickers hardness of the brass anti-scratch layer is HV80-100, and the Vickers hardness of the gear hub surface is HV300+. The Vickers hardness of the brass anti-scratch layer is significantly lower than that of the gear hub surface, realizing hardness gradient protection to prevent scratching of the outer surface of the gear hub during the transfer process. A crossbar 24 is also provided between the two fixed rods 21. The crossbar 24 provides tension to the two fixed rods 21 to limit their opening. In use, the two fixed clamping parts 23 on the fixed boom 2 are used to support the gear hub.

[0045] In other embodiments, the inner ends of the two fixing rods 21 are fixed at a point, and their intersection is fixed to the fixed side of the lifting ring 1.

[0046] In other embodiments, the boom is integrally formed and does not include the fixed rod 21 and the support rod 22.

[0047] In other embodiments, a crossbar 24 may not be provided between the two fixed rods 21, or multiple crossbars 24 may be provided.

[0048] like Figure 8 As shown, the movable boom includes a rotating part 31 and a connecting part 32. The inner end of the rotating part 31 (i.e., the upper end of the movable boom) is rotatably connected to the rotating side, and dynamic constraint devices 4 (i.e., gaskets 4) are provided on both sides of the inner end of the rotating part 31 (i.e., the upper end of the movable boom). The dynamic constraint devices 4 are used to restrict the inner end of the rotating part 31 (i.e., the upper end of the movable boom) from moving axially along its rotation axis. The outer end of the rotating part 31 is connected to the upper end of the connecting part 32 at an obtuse angle, and the lower end of the connecting part 32 (i.e., the lower end of the movable boom) is connected to the outer end of the movable clamping part 33 at a right angle. The movable clamping part 33 is provided with a brass anti-scratch layer to prevent the gear hub from being scratched. The thickness of the layer is 3mm and the tolerance is ±0.1mm. In use, the movable arm 3 can be rotated around the rotating end by simply moving the movable arm 3, thereby adjusting the angle between the movable arm 3 and the fixed boom 2.

[0049] In other embodiments, the lifting ring 1, the fixed lifting arm 2, and the movable arm 3 may also be made of other known materials; the anti-scratch layer on the fixed clamping part 23 and the movable clamping part 33 may also be made of engineering plastic instead of brass anti-scratch layer.

[0050] In other embodiments, the length of the fixed clamping part 23 is equal to the length of the movable clamping part 33, but the lengths of the two may not be equal; the central axes of both the fixed clamping part 23 and the movable clamping part 33 point to the central axis of the lifting ring 1.

[0051] In this utility model, a gear hub transfer fixture is used to transfer gear hubs. When the gear hub is transferred, the two fixed clamping parts 23 of the gear hub transfer fixture contact the upper wall surface of the movable clamping part 33. Since the vertical distance L1 between the lifting ring 1 and the upper wall surface of the fixed clamping part 23 is equal to the vertical distance L2 between the lifting ring 1 and the upper wall surface of the movable clamping part 33, the gear hub transfer fixture triggers a self-locking state, which can effectively prevent the gear hub to be transferred from falling off and improve the safety of gear hub transfer.

[0052] like Figure 1-8 As shown, the assembly method of an embodiment of the gear hub transfer tooling of this utility model is as follows:

[0053] (1) Weld the two washers 41 to the rotating side of the lifting ring 1;

[0054] (2) Insert the inner end of the rotating part 31 of the movable arm 3 (i.e. the upper end of the movable rod) into the space between the two shims 41 on the rotating side, and then cover the movable clamping part 33 with a 3mm brass anti-scratch layer.

[0055] (3) Weld the inner end (i.e. the upper end of the rod) of the fixed boom 2 to the fixed side of the lifting ring 1, and then cover the fixed clamping part 23 with a 3mm brass anti-scratch layer to complete the assembly of the gear hub transfer tool.

[0056] like Figure 9-10 As shown, the working principle of a gear hub transfer fixture embodiment of this utility model is as follows:

[0057] (1) The operator inserts the upper wall of the two fixed clamping parts 23 into the bottom of the gear hub to be transferred;

[0058] (2) Rotate the angle of the movable arm 3 so that the movable clamping part 33 also engages with the bottom of the gear hub to be transferred;

[0059] (3) After the gear hub to be transferred is secured, the operator pulls the handle 12 upwards. The movable arm 3 and the fixed boom 2 are affected by the gravity of the gear hub to be transferred, triggering the self-locking state, so that the lifting process is "tighter and tighter", avoiding the phenomenon of the gear hub to be transferred coming off the hook.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this utility model.

Claims

1. A gear hub transfer fixture, characterized in that, include: Lifting ring (1), fixed boom (2) and movable boom (3); The fixed boom (2) includes two booms and two fixed clamping parts (23); the upper ends of the two booms are connected to the lifting ring (1), and the lower ends are respectively connected to the outer end of one of the fixed clamping parts (23); A handle (12) is vertically fixed to the upper side of the lifting ring (1); the two sides of the lifting ring (1) are the fixed side and the rotating side, respectively, and the fixed side is fixedly connected to the upper end of the lifting rod. The movable arm (3) includes a movable rod and a movable clamping part (33). The upper end of the movable rod is rotatably connected to the rotating side, and dynamic constraint devices (4) are provided on both sides of the upper end of the rotating side to restrict the upper end of the movable rod from moving axially along its rotation axis. The lower end of the movable rod is connected to the outer end of the movable clamping part (33). Define the lifting ring (1) as horizontal; then: the upper wall of the fixed clamping part (23) is located in the same horizontal plane, and the vertical distance between it and the lifting ring (1) is L1; when the upper wall of the movable clamping part (33) is in a horizontal state, the vertical distance between it and the lifting ring (1) is L2, and L2 = L1.

2. The gear hub transfer fixture according to claim 1, characterized in that: The boom includes a fixed rod (21) and a support rod (22); the inner end of the fixed rod (21) is connected to the fixed side, and its outer end is connected to the upper end of the support rod (22); the lower end of the support rod (22) is connected to the outer end of the fixed clamping part (23). The movable boom includes a rotating part (31) and a connecting part (32); the inner end of the rotating part (31) is rotatably connected to the rotating side, and dynamic constraint devices (4) are provided on both sides of the upper end of the rotating side to restrict the upper end of the movable boom from moving axially along its rotation axis; the outer end of the rotating part (31) is connected to the upper end of the connecting part (32), and the lower end of the connecting part (32) is connected to the outer end of the movable clamping part (33).

3. The gear hub transfer fixture according to claim 2, characterized in that: The angle between the upper end of the support rod (22) and the outer end of the fixed rod (21) is obtuse, and the angle between its lower end and the outer end of the fixed clamping part (23) is right. The angle between the upper end of the connecting part (32) and the outer end of the rotating part (31) is obtuse, and the angle between its lower end and the outer end of the movable clamping part (33) is right.

4. The gear hub transfer fixture according to claim 3, characterized in that: The inner ends of the two fixing rods (21) are cross-fixed at one point, and their cross-section is connected to the fixing side.

5. The gear hub transfer fixture according to any one of claims 2-4, characterized in that: A crossbar (24) is provided between the two fixed rods (21), and the number of crossbars (24) is ≥1.

6. The gear hub transfer fixture according to any one of claims 1-4, characterized in that: The length of the fixed clamping part (23) is equal to the length of the movable clamping part (33).

7. The gear hub transfer fixture according to any one of claims 1-4, characterized in that: The central axes of the two fixed clamping parts (23) and the movable clamping part (33) both point in the direction of the central axis of the lifting ring (1).

8. The gear hub transfer fixture according to claim 1, characterized in that: The dynamic constraint device (4) is a shim (41) or an elastic retaining ring. The shim (41) or the elastic retaining ring is set vertically, and the distance between the two is adapted to the width of the upper end of the movable rod along its rotation axis.

9. The gear hub transfer fixture according to any one of claims 1-4, characterized in that: Both the fixed clamping part (23) and the movable clamping part (33) are provided with a brass anti-scratch layer with a thickness of 3mm and a tolerance of ±0.1mm.

10. The gear hub transfer fixture according to claim 1, characterized in that: The lifting ring (1), fixed boom (2) and movable boom (3) are all made of Q235 carbon structural steel.

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