Tool for assembling elastic belt

Abstract

The utility model discloses a tool for assembling an elastic belt, which comprises a connecting plate, a fixing sleeve, a connecting sleeve and an arc-shaped plate, the fixing sleeve is fixedly connected with the connecting plate, the connecting sleeve is mounted on the connecting plate, the fixing sleeve and the connecting plate are respectively positioned on two sides of the connecting plate, the arc-shaped plate is fixedly connected with the connecting plate, and the arc-shaped plate is fixedly connected with the connecting plate. The arc-shaped plate is located on the side, close to the connecting sleeve, of the connecting plate, the arc-shaped plate is bent towards the side close to the connecting sleeve, the side, away from the connecting sleeve, of the arc-shaped plate is provided with an inclined face, the end, away from the connecting plate, of the inclined face inclines towards the direction close to the connecting sleeve, and one end of the arc-shaped plate is provided with an abutting fillet edge. An abutting chamfer is arranged at the connecting position of the abutting fillet edge and the connecting plate, and a belt wheel containing groove is formed in the side, close to the connecting sleeve, of the arc-shaped plate. The beneficial effects of the utility model are that: can be applicable to two kinds of belt wheels with and without the wheel groove, reach the advantage of good applicability.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling, and particularly relates to a tooling for assembling an elastic belt. Background Art

[0002] The crankshaft of an automobile engine drives the water pump and the generator to operate through a belt. The belt needs to be kept in a tensioned state to achieve transmission. A tensioning wheel is installed on a traditional automobile engine to tighten the belt to obtain sufficient tension. Due to the addition of a tensioning wheel mechanism in the product, not only does the product cost increase, but the additional structure also increases the probability of engine abnormal noise. Therefore, some engines in the prior art adopt an elastic belt structure, by canceling the tensioning wheel and using an elastic belt for installation. When installing the elastic belt, it is necessary to stretch the belt, make the belt elastically deformed and opened, then install the belt on the pulley, and then release the belt to make the belt elastically contract and cooperate with the pulley, so that the elastic belt can still maintain a tensioned state after being installed on the pulley. The tension required for the elastic belt is relatively large, and the tensile force required for the assembly of some elastic belts reaches 400 N·m. Therefore, a tooling is needed for the assembly of the elastic belt.

[0003] The Chinese utility model patent with the publication number CN206175587U discloses a belt installation tooling for an engine elastic belt, belonging to the technical field of automobiles. It solves the problem of how to improve the installation efficiency of the elastic belt. It includes an arc-shaped installation block. An arc-shaped card slot that runs through from one end to the other end of the installation block is arranged on the inner side surface of the installation block. Claw teeth are arranged on the inner peripheral surface of the installation block. The outer peripheral surface of the installation block near the outside has an inclined baffle edge, and a guiding inclined surface that is inclined relative to the radial cross-section of the installation block is arranged on the inner side of the inclined baffle edge. It is connected to the driving pulley in a clamping manner, which is convenient for disassembly and assembly; at the same time, by designing the inclined baffle edge and using the guiding of the inclined baffle edge, the assembly speed of the belt is improved; the installation efficiency of the elastic belt is greatly improved, making the installation of the elastic belt more convenient.

[0004] The above-mentioned belt installation tooling for the engine elastic belt can only be applied to the pulley with a pulley groove on the hub. When used on a pulley without a designed pulley groove, the claw teeth cannot be installed on the hub, resulting in the installation block not being able to be fixed to the guide pulley. Therefore, there is a technical problem of poor applicability in the prior art. Summary of the Utility Model

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a tooling for assembling an elastic belt, which includes a connecting plate, a fixed sleeve, a connecting sleeve and an arc-shaped plate, and the tooling for assembling the elastic belt has the advantage of good applicability.

[0006] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0007] A tool for assembling an elastic belt, comprising a connecting plate, a fixing sleeve, a connecting sleeve and an arc plate, wherein the fixing sleeve is fixedly connected to the connecting plate, the connecting sleeve is installed on the connecting plate, the fixing sleeve and the connecting plate are respectively located on both sides of the connecting plate, the arc plate is fixedly connected to the connecting plate, the arc plate is located on a side of the connecting plate close to the connecting sleeve, the arc plate is bent toward the side close to the connecting sleeve, an inclined surface is provided on a side of the arc plate away from the connecting sleeve, the inclined surface is inclined toward a direction close to the connecting sleeve away from an end of the connecting plate, an abutting rounded edge is provided at one end of the arc plate, an abutting chamfer is provided at the connection between the abutting rounded edge and the connecting plate, and a pulley accommodating groove is provided on the side of the arc plate close to the connecting sleeve.

[0008] Through such an arrangement: the elastic belt is connected to the pulley axis through the connecting sleeve, and the arc plate stretches the elastic belt to the outer peripheral surface of the guide wheel, and makes the elastic belt slide along the inclined surface to the guide wheel, thereby realizing the function of installing the elastic belt on the pulley without wheel groove. It can be applicable to both pulleys with wheel grooves and those without wheel grooves, achieving the advantage of better applicability.

[0009] Preferably, the axis center of the fixing sleeve coincides with the axis center of the connecting sleeve.

[0010] Such an arrangement makes it easier to rotate the fixing sleeve.

[0011] Preferably, a pulley engagement space is provided at one end of the arc-shaped plate away from the connecting plate.

[0012] Such an arrangement makes it easier to install the elastic belt.

[0013] Preferably, the connecting plate is fan-shaped as a whole, and the angle between the two side surfaces of the connecting plate is 60°.

[0014] Through such an arrangement, it is possible to prevent the angles between the two side surfaces of the connecting plate from being too small or too large.

[0015] Preferably, the connecting plate is provided with a weight-reducing hole, and the weight-reducing hole is located between the fixing sleeve and the arc-shaped plate.

[0016] Through such a setting, the weight can be reduced and it is convenient for personnel to carry out assembly operations.

[0017] Preferably, the arc center of the arc-shaped plate is located on the axis of the connecting sleeve.

[0018] Such an arrangement prevents the arc-shaped plate from colliding with the pulley during rotation, thereby improving reliability.

[0019] Preferably, a support section is provided at one end of the connecting plate away from the abutting rounded edge.

[0020] Through such an arrangement, the structural strength of the connecting plate is enhanced.

[0021] Preferably, the cross-sectional profile of the inner wall of the connecting sleeve is a regular hexagon, and the cross-sectional profile of the inner wall of the fixing sleeve is a square.

[0022] With such a setting, the reliability between the connecting sleeve and the fastener on the engine crankshaft is improved.

[0023] Preferably, the connecting sleeve is detachably connected to the connecting plate.

[0024] With such a setting, the applicability is improved.

[0025] Preferably, the connecting sleeve is provided with a cylindrical boss, and the connecting plate is provided with a groove matching the cylindrical boss.

[0026] With such a setting, the effect of improving the applicability is achieved.

[0027] Compared with the prior art, the utility model has achieved beneficial technical effects:

[0028] By connecting the connecting sleeve to the fastener at the axis of the pulley, the connecting sleeve and the connecting plate can be supported by the crankshaft and the fastener. By connecting the wrench to the fixing sleeve, when the wrench rotates the fixing sleeve, the fixing sleeve drives the connecting plate and the arc-shaped plate to rotate. Thus, the elastic belt is stretched to the outer peripheral surface of the guide pulley by the arc-shaped plate, and the elastic belt slides onto the guide pulley along the inclined surface, realizing the function of installing the elastic belt on a pulley without a groove. It can be applicable to two types of pulleys with and without grooves, achieving the advantage of good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a tooling for assembling an elastic belt in an embodiment of the utility model;

[0030] Figure 2 is a schematic structural diagram of the connecting plate in an embodiment of the utility model;

[0031] Figure 3 is a schematic structural diagram of the connecting sleeve and the fixing sleeve in an embodiment of the utility model.

[0032] Among them, the technical features represented by the reference numerals are as follows:

[0033] 11. Connecting plate; 12. Fixing sleeve; 13. Weight-reducing hole; 14. Support section; 21. Connecting sleeve; 22. Cylindrical boss; 23. Groove; 31. Arc-shaped plate; 32. Inclined surface; 33. Contact rounded edge; 34. Contact chamfer; 35. Accommodating groove; 36. Connecting space. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] In order to make the purpose, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with embodiments. However, the scope of protection required by the present utility model is not limited to the specific embodiments described below.

[0035] Reference Figures 1-3 , a tooling for assembling an elastic belt, including a connecting plate 11, a fixing sleeve 12, a connecting sleeve 21 and an arc plate 31.

[0036] The connecting sleeve 21 is installed on the connecting plate 11. The cross-sectional profile of the inner wall of the connecting sleeve 21 is a regular hexagon. The connecting sleeve 21 is detachably connected to the connecting plate 11. The connecting sleeve 21 is provided with a cylindrical boss 22, and the connecting plate 11 is provided with a groove 23 that cooperates with the cylindrical boss 22.

[0037] The fixing sleeve 12 is fixedly connected to the connecting plate 11. The fixing sleeve 12 and the connecting plate 11 are respectively located on both sides of the connecting plate 11. The axis of the fixing sleeve 12 coincides with the axis of the connecting sleeve 21. The cross-sectional profile of the inner wall of the fixing sleeve 12 is a square. The connecting plate 11 is provided with a weight-reducing hole 13, and the weight-reducing hole 13 is located between the fixing sleeve 12 and the arc plate 31.

[0038] The arc plate 31 is fixedly connected to the connecting plate 11. The arc plate 31 is located on the side of the connecting plate 11 close to the connecting sleeve 21. The arc plate 31 bends towards the side close to the connecting sleeve 21. The side of the arc plate 31 away from the connecting sleeve 21 is provided with an inclined surface 32. One end of the inclined surface 32 away from the connecting plate 11 inclines towards the direction close to the connecting sleeve 21. One end of the arc plate 31 is provided with a butting rounded edge 33. The connection part of the butting rounded edge 33 and the connecting plate 11 is provided with a butting chamfer 34. The side of the arc plate 31 close to the connecting sleeve 21 is provided with a pulley accommodating groove 35. One end of the arc plate 31 away from the connecting plate 11 is provided with a pulley connecting vacancy 36. The connecting plate 11 is integrally fan-shaped, and the included angle between the two side surfaces of the connecting plate 11 is 60°. The center of the arc of the arc plate 31 is located on the axis of the connecting sleeve 21. One end of the connecting plate 11 away from the butting rounded edge 33 is provided with a supporting section 14. Through the setting of the supporting section 14, the effect of strengthening the structural strength of the connecting plate 11 is achieved.

[0039] The pulley needs to be installed on the engine crankshaft, so there are fasteners for connecting the pulley axis position to the engine crankshaft. The connecting sleeve 21 is sleeved on the fastener of the pulley. Since the arc-shaped plate 31 is on the side of the connecting plate 11 close to the connecting sleeve 21, the arc-shaped plate 31 can be located at the outer peripheral surface of the pulley, and the pulley is located in the pulley receiving groove 35. Then, the elastic belt is hung on the abutting rounded edge 33 of the arc-shaped plate 31. Use a wrench to rotate the fixing sleeve 12. The fixing sleeve 12 drives the connecting plate 11 and the arc-shaped plate 31 to rotate. The arc-shaped plate 31 abuts against the elastic belt through the abutting chamfer 34. The elastic belt slides along the inclined direction of the abutting chamfer 34 during the rotation of the connecting plate 11 and the arc-shaped plate 31 to the abutting rounded edge 33, and then slides from the abutting rounded edge 33 to the outer peripheral surface of the arc-shaped plate 31. Thus, the elastic belt can be expanded by the arc-shaped plate 31 to cause elastic deformation of the elastic belt. The elastic belt on the outer peripheral surface of the arc-shaped plate 31 slides along the inclined surface 32 in the direction away from the connecting plate 11 until the elastic belt disengages from the arc-shaped plate 31. Thus, the elastic belt can be guided by the inclined surface 32 to slide onto the pulley, realizing the assembly of the elastic belt.

[0040] This embodiment has the following advantages:

[0041] By connecting the connecting sleeve 21 to the fastener at the axis of the pulley, the crankshaft and the fastener can provide support force for the connecting sleeve 21 and the connecting plate 11. Connect the wrench to the fixing sleeve 12. Rotate the fixing sleeve 12 with the wrench. The fixing sleeve 12 drives the connecting plate 11 and the arc-shaped plate 31 to rotate. Thus, the elastic belt is expanded by the arc-shaped plate 31 to the outer peripheral surface of the guide pulley, and the elastic belt slides onto the guide pulley along the inclined surface 32, realizing the function of installing the elastic belt on the pulley without a groove. It can be applicable to two types of pulleys with and without grooves, achieving the advantage of good applicability.

[0042] The fixing sleeve 12 and the connecting sleeve 21 are coaxially arranged, so that the fixing sleeve 12 can rotate around the axis of the connecting sleeve 21, so that the position of the fixing sleeve 12 remains unchanged when the wrench drives the fixing sleeve 12 to rotate, playing the role of facilitating the rotation of the fixing sleeve 12.

[0043] When the connecting sleeve 21 is sleeved on the fastener on the engine crankshaft, the arc-shaped plate 31 covers a part of the outer peripheral surface of the pulley. One end of the pulley away from the connecting sleeve 21 is located in the pulley connection vacancy 36. Thus, it is convenient to assemble the elastic belt expanded by the arc-shaped plate 31 onto the pulley, preventing the elastic belt from sliding too far along the inclined direction of the inclined surface 32, so that when the side of the elastic belt close to the connecting plate 11 still contacts the arc-shaped plate 31, the side of the elastic belt away from the connecting plate 11 can be matched to the pulley, playing the role of facilitating the installation of the elastic belt.

[0044] The included angle between the two side surfaces of the connecting plate 11 is set to 60°. This prevents the included angle between the two side surfaces of the connecting plate 11 from being too small. After the connecting sleeve 21 is sleeved on the engine crankshaft, the arc-shaped plate 31 wraps around the elastic pulley with a large contact area, making it easy to be firmly fixed on the elastic pulley of the crankshaft and not easy to come off during the rotation of the elastic pulley of the crankshaft. And it prevents the included angle between the two side surfaces of the connecting plate 11 from being too large. After the elastic belt is clamped with the pulley, it can make the arc-shaped plate 31 separate from the elastic belt as soon as possible, so that the elastic belt can be pressed on the pulley as soon as possible, which is convenient for removing the tool in time. Otherwise, it is easy to turn the elastic belt in the direction away from the connecting plate 11, and instead fails to achieve the assembly effect. And it can also play a role in weight reduction.

[0045] Through the setting of the weight-reducing holes 13, it plays a role in reducing weight and is convenient for personnel to carry out assembly operations.

[0046] The center of the arc of the arc-shaped plate 31 coincides with the axis of the connecting sleeve 21. When the connecting plate 11 and the arc-shaped plate 31 rotate around the axis of the connecting sleeve 21, the distance between the arc-shaped plate 31 and the connecting sleeve 21 remains unchanged. Thus, the distance between the arc-shaped plate 31 and the pulley remains unchanged during the rotation process, preventing the arc-shaped plate 31 from colliding with the pulley during rotation and playing a role in improving reliability.

[0047] The cross-section of the inner wall of the connecting sleeve 21 is set as a regular hexagon to match the engine crankshaft that uses external hexagon screws as fasteners, improving the reliability between the connecting sleeve 21 and the fasteners on the engine crankshaft

[0048] The connecting sleeve 21 is disassembled on the connecting plate 11, and a connecting sleeve 21 with a different inner hole size is replaced. Thus, it can adapt to the engine crankshaft with different fasteners by replacing the connecting sleeve 21, playing a role in improving applicability.

[0049] Through the cooperation of the cylindrical boss 22 and the groove 23, it plays a role in improving the reliability between the connecting sleeve 21 and the connecting plate 11. And it enables the connecting plate 11 to rotate on the connecting sleeve 21, so that when the fixed sleeve 12 drives the connecting plate 11 to rotate, it is not necessary to drive the engine crankshaft to rotate synchronously, avoiding the situation that the engine crankshaft cannot rotate temporarily during the production process and resulting in the inability to install the elastic belt, and playing a role in improving applicability.

[0050] According to the disclosure and teaching of the above specification, those skilled in the art of the present utility model can also make changes and modifications to the above embodiments. Therefore, the present utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of the present utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the utility model.

Claims

1. A tool for assembling an elastic belt, characterized in that: The invention comprises a connecting plate (11), a fixing sleeve (12), a connecting sleeve (21) and an arc-shaped plate (31), wherein the fixing sleeve (12) is fixedly connected to the connecting plate (11), the connecting sleeve (21) is installed on the connecting plate (11), the fixing sleeve (12) and the connecting plate (11) are respectively located on two sides of the connecting plate (11), the arc-shaped plate (31) is fixedly connected to the connecting plate (11), the arc-shaped plate (31) is located on a side of the connecting plate (11) close to the connecting sleeve (21), and the arc-shaped plate (31) is disposed toward The side close to the connecting sleeve (21) is bent, and the side of the arc plate (31) away from the connecting sleeve (21) is provided with an inclined surface (32), and the end of the inclined surface (32) away from the connecting plate (11) is inclined in a direction close to the connecting sleeve (21), and one end of the arc plate (31) is provided with an abutting rounded edge (33), and the connection between the abutting rounded edge (33) and the connecting plate (11) is provided with an abutting chamfer (34), and the side of the arc plate (31) close to the connecting sleeve (21) is provided with a pulley accommodating groove (35).

2. The tool for assembling an elastic belt according to claim 1, characterized in that: The axis center of the fixing sleeve (12) coincides with the axis center of the connecting sleeve (21).

3. The tool for assembling an elastic belt according to claim 1, characterized in that: A pulley connection space (36) is provided at one end of the arc-shaped plate (31) away from the connecting plate (11).

4. The tool for assembling an elastic belt according to claim 1, characterized in that: The connecting plate (11) is fan-shaped as a whole, and the angle between the two side surfaces of the connecting plate (11) is 60°.

5. The tool for assembling an elastic belt according to claim 1, characterized in that: The connecting plate (11) is provided with a weight-reducing hole (13), and the weight-reducing hole (13) is located between the fixing sleeve (12) and the arc-shaped plate (31).

6. The tool for assembling an elastic belt according to claim 1, characterized in that: The arc center of the arc-shaped plate (31) is located on the axis center of the connecting sleeve (21).

7. The tool for assembling an elastic belt according to claim 1, characterized in that: The connecting plate (11) is provided with a supporting section (14) at one end away from the abutting rounded edge (33).

8. The tool for assembling an elastic belt according to claim 1, characterized in that: The cross-sectional profile of the inner wall of the connecting sleeve (21) is a regular hexagon, and the cross-sectional profile of the inner wall of the fixing sleeve (12) is a square.

9. The tool for assembling an elastic belt according to claim 1, characterized in that: The connecting sleeve (21) is detachably connected to the connecting plate (11).

10. The tool for assembling an elastic belt according to claim 9, characterized in that: The connecting sleeve (21) is provided with a cylindrical boss (22), and the connecting plate (11) is provided with a groove (23) matching with the cylindrical boss (22).

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