Wheel removal device

Abstract

The utility model discloses a kind of wheel dismounting devices, including draw bar, still include two U-shaped plates, two the U-shaped plate opening is oppositely arranged, the U-shaped plate top is provided with groove, the U-shaped plate bottom is provided with clamping groove, two the U-shaped plate between through hole is connected with first screw rod, positioning sleeve is set on the first screw rod between two the U-shaped plate, the first screw rod both ends are threadedly connected with first nut, the draw bar's needle passes through groove.Compared with prior art, the utility model is clamped to the bottom of pulley through the clamping groove of two U-shaped plates, simultaneously, draw bar jaw can hold two U-shaped plates, effectively solve the problem that draw bar jaw cannot directly hold the bottom of pulley due to the gap between pulley and shaft body is too small, so that draw bar can stably dismount pulley from shaft body.

Description

Technical Field

[0001] This utility model relates to the field of pulley technology, and in particular to a pulley disassembly device. Background Technology

[0002] In mechanical transmission systems, pulleys are important power transmission components and are widely used in various equipment such as motors, pumps, and reducers. Pulleys are usually fixed to the shaft by key connections, interference fits, or other methods. During equipment maintenance, repair, or component replacement, it is necessary to remove the pulleys from the shaft.

[0003] Currently, the most commonly used pulley removal tool in the industry is the puller. Its working principle involves gripping the edge or bottom of the pulley with jaws, then using a pin to press against the end of the shaft, applying axial force to separate the pulley from the shaft. However, in practical applications, after the pulley is fixed to the shaft, other adjacent mechanisms are often mounted on the shaft, such as bearing housings, gear sets, motor end covers, or other transmission components. The installation distance between these mechanisms and the pulley is usually small, creating a narrow gap.

[0004] Because the puller jaws themselves have a certain thickness and clamping angle requirements, the narrow gap cannot provide enough space for the jaws to engage, making it difficult for them to directly clamp onto the effective force-bearing position at the bottom of the pulley. Forcing clamping not only easily leads to jaw slippage and inaccurate positioning, but may also cause impact damage to the pulley edge or adjacent mechanisms, affecting the precision and lifespan of equipment components. In such cases, operators often need to use pry bars, hammers, or other auxiliary tools for forced disassembly, which is not only inefficient and labor-intensive, but also carries the risk of shaft deformation and pulley damage due to uneven force, causing numerous inconveniences for equipment maintenance. Utility Model Content

[0005] The main purpose of this utility model is to provide a pulley disassembly device, which uses two U-shaped plates to clamp the bottom of the pulley through the slots, and the puller claw can hold the two U-shaped plates at the same time. This effectively solves the problem that the puller claw cannot directly clamp the bottom of the pulley because the gap between the pulley and the shaft is too small, so that the puller can stably disassemble the pulley from the shaft.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A puller is provided for disassembling a puller and two U-shaped plates with their openings facing each other. The top of each U-shaped plate has a groove, and the bottom of each U-shaped plate has a slot. A first screw is connected between the two U-shaped plates through a through hole. A positioning sleeve is fitted on the first screw located between the two U-shaped plates. The two ends of the first screw are threaded with first nuts. The puller's pin passes through the groove.

[0007] Furthermore, positioning grooves are provided on the opposite sides of the two U-shaped plates.

[0008] Furthermore, the two U-shaped plates are fixedly connected by several connecting components.

[0009] Furthermore, the connecting assembly includes a connecting groove formed at the bottom of one side of the U-shaped plate, a second screw inserted between the two connecting grooves, and a second nut threadedly connected to the end of the second screw located on the outer side of the two U-shaped plates.

[0010] Furthermore, one end of the connecting groove extends to the side wall of the U-shaped plate to form an opening.

[0011] Furthermore, both the groove and the slot are V-shaped.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention uses two U-shaped plates to clamp the bottom of the pulley in slots, while the puller claw can hold the two U-shaped plates. This effectively solves the problem that the puller claw cannot directly clamp the bottom of the pulley due to the small gap between the pulley and the shaft, allowing the puller to stably remove the pulley from the shaft.

[0013] The first screw, positioning sleeve, and first nut of this utility model fix the relative positions of the two U-shaped plates, and the second screw and second nut lock the bottom of the U-shaped plates. This can prevent the U-shaped plates from shifting or opening at the bottom during puller operation, ensure that the disassembly force is stably transmitted to the pulley, reduce the safety risks during the disassembly process, and improve the success rate of the operation.

[0014] The symmetrical design of the V-shaped groove and V-shaped card slot of this utility model, with the V-shaped structure's ability to accommodate different diameters, can flexibly adapt to the clamping needs of various specifications of pulleys by adjusting the relative distance between the two U-shaped plates. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a pulley disassembly device according to the present invention.

[0016] Figure 2 This is a schematic diagram showing the connection of two U-shaped plates in a pulley disassembly device according to this utility model.

[0017] Figure 3 This is a schematic diagram of the U-shaped plate structure of a pulley disassembly device according to the present invention.

[0018] In the diagram: 1. Puller; 2. U-shaped plate; 3. Positioning sleeve; 4. Positioning groove; 5. Second screw; 6. Connecting groove; 7. First screw; 8. First nut; 9. Groove; 10. Slot; 11. Through hole; 12. Second nut. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] like Figure 1-3 As shown, a pulley disassembly device includes a puller 1 and two U-shaped plates with opposite openings, as well as a positioning sleeve 3, a first screw 7, a first nut 8, a second screw 5, and a second nut 12.

[0024] The two U-shaped plates 2 together form a space to accommodate the pulley and related components. A V-shaped groove 9 is opened at the top and a V-shaped slot 10 is opened at the bottom. The large openings of the groove 9 and the slot 10 both face outwards, and a positioning groove 4 is also opened on the side that is far away from each other.

[0025] The groove 9 provides an insertion channel for the pin of the puller 1 and enables positioning. The slot 10 is used to clamp the bottom of the pulley. The V-shaped structure design can be adapted to pulleys of different diameters by adjusting the distance between the two U-shaped plates 2. The positioning groove 4 is used for the puller 1's gripper to engage, ensuring the connection stability between the gripper and the U-shaped plate 2.

[0026] A first screw 7 passes through a through hole 11 between the two U-shaped plates 2. A positioning sleeve 3 is fitted on the first screw 7. The positioning sleeve 3 of the corresponding length needs to be selected in advance according to the spacing after the U-shaped plates 2 clamp the pulley. The two ends of the first screw 7 are threaded to the first nut 8. When the slots 10 of the two U-shaped plates 2 are clamped to the bottom of the pulley, the sidewalls of the U-shaped plates 2 will fit against the positioning sleeve 3. At this time, tightening the first nut 8 can clamp and fix the two U-shaped plates 2, preventing the relative position of the two U-shaped plates 2 from shifting when the puller 1 is working, and ensuring that the upward disassembly force of the puller 1 can be stably transmitted to the pulley.

[0027] Each of the two U-shaped plates 2 has a connecting groove 6 on one side of its bottom. One end of the connecting groove 6 extends to the side wall of the U-shaped plate to form an opening. A second screw 5 is inserted between the two connecting grooves 6. The two ends of the second screw 5 are located on the outside of the U-shaped plate and are threadedly connected to the second nut 12. Tightening the second nut 12 can lock the bottom of the U-shaped plate 2, preventing the bottom of the U-shaped plate 2 from opening outward when the puller 1's gripper applies force, further improving the stability of the pulley clamping. During disassembly, the second screw 5 can be easily removed from the opening of the connecting groove 6 by unscrewing the second nut 12.

[0028] The overall disassembly process requires first adjusting the distance between the two U-shaped plates 2 according to the pulley diameter, then selecting a positioning sleeve 3 of the corresponding length and fitting it onto the first screw 7, and securing the bottom of the U-shaped plate 2 in the slot 10 to the bottom of the pulley; subsequently, tighten the first nut 8 to fix the relative positions of the two U-shaped plates 2, insert the second screw 5 and tighten the second nut 12 to lock the bottom of the U-shaped plates 2. Finally, insert the puller 1 into the positioning groove 4, align the ejector pin through the groove 9 with the shaft, and activate the puller to apply upward force, thus removing the pulley from the shaft.

[0029] Working principle: The pulley disassembly device forms a pulley accommodating space through two U-shaped plates 2 with opposite openings. The pulley is clamped by the bottom V-shaped groove 10. The relative positions of the two U-shaped plates 2 are fixed by the positioning sleeve 3 of the pre-selected length, the first screw 7, and the first nut 8. The bottom of the U-shaped plates 2 is then locked by the second screw 5 and the second nut 12 to prevent it from opening under force. The claws of the puller 1 are engaged in the positioning groove 4 on the side of the U-shaped plate 2, and the ejector pin passes through the top V-shaped groove 9 and is aligned with the shaft. Applying an upward force can disassemble the pulley from the shaft. The V-shaped groove 9 and the groove 10 can be adjusted by adjusting the spacing of the U-shaped plates 2 to accommodate pulleys of different diameters.

[0030] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent transformations or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A pulley disassembly device, comprising a puller (1), characterized in that: It also includes two U-shaped plates (2), the openings of the two U-shaped plates (2) are arranged opposite each other, the top of the U-shaped plates (2) is provided with a groove (9), the bottom of the U-shaped plates (2) is provided with a slot (10), the two U-shaped plates (2) are connected by a first screw (7) through a through hole (11), a positioning sleeve (3) is provided on the first screw (7) located between the two U-shaped plates (2), the two ends of the first screw (7) are threaded with a first nut (8), the pin of the puller (1) passes through the groove (9), and the two U-shaped plates (2) are provided with positioning grooves (4) on the sides that are far apart.

2. The pulley disassembly device according to claim 1, characterized in that: The two U-shaped plates (2) are also fixedly connected by several connecting components.

3. The pulley disassembly device according to claim 2, characterized in that: The connecting assembly includes a connecting groove (6) opened at the bottom of one side of the U-shaped plate (2), a second screw (5) is inserted between the two connecting grooves (6), and a second nut (12) is threadedly connected to the end of the second screw (5) located on the outside of the two U-shaped plates (2).

4. The pulley disassembly device according to claim 3, characterized in that: One end of the connecting groove (6) extends to the side wall of the U-shaped plate (2) to form an opening.

5. The pulley disassembly device according to claim 1, characterized in that: Both the groove (9) and the card slot (10) are V-shaped.

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