Belt mounting tool for belt pulley

Abstract

The utility model discloses a belt installation tool for a belt pulley. The belt installation tool is provided with a belt leading-in face and a belt leading-out face which are located in the radial direction of the belt pulley. The distance between the belt lead-in surface and the rotating axis of the belt pulley is smaller than the radius of the belt pulley; the distance between the belt leading-out surface and the rotating axis of the belt pulley is not less than the radius of the belt pulley; when a belt is assembled on the belt pulley through the belt mounting tool, the belt mounting tool is arranged on the belt pulley, and the belt is led into the belt mounting tool from the belt leading-in face along with rotation of the belt mounting tool and led out to a belt groove of the belt pulley through the belt leading-out face. The belt can be quickly and simply assembled into the belt groove of the belt pulley, and the assembly damage to the belt pulley is reduced.

Description

Belt mounting fixture for pulleys Technical Field

[0001] This utility model relates to the field of belt tooling, specifically to a belt installation tooling for pulleys. Background Technology

[0002] Currently, when assembling an engine with an elastic belt, the belt groove of the drive pulley is obscured by the pulley itself, making it inconvenient to assemble by moving around the drive pulley. Traditional tools such as screwdrivers are used to pry the elastic belt into the belt groove, while simultaneously rotating the pulley to install the elastic belt onto the pulley. This operation is complex, difficult, time-consuming, and labor-intensive. This method can sometimes cause the paint on the pulley to peel off, and at the prying point, the pulley is prone to being pressed inward, forming a notch, which can damage the pulley and affect its appearance.

[0003] Therefore, to solve the above problems, a belt installation tool for pulleys is needed, which can quickly and easily install the belt into the belt groove of the pulley, reducing assembly damage to the pulley. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to overcome the defects in the prior art and provide a belt installation fixture for pulleys, which can quickly and easily assemble the belt into the belt groove of the pulley and reduce assembly damage to the pulley.

[0005] The present invention relates to a belt mounting fixture for a pulley, the belt mounting fixture having a belt inlet surface and a belt outlet surface located radially on the pulley;

[0006] The distance between the belt inlet surface and the pulley rotation axis is less than the radius of the pulley; the distance between the belt outlet surface and the pulley rotation axis is not less than the radius of the pulley.

[0007] Furthermore, the distance between the belt inlet surface and the pulley rotation axis and the distance between the belt outlet surface and the pulley rotation axis shall not exceed the diameter of the pulley.

[0008] Furthermore, the belt installation fixture also has a belt guide face located between the belt inlet face and the belt outlet face;

[0009] When the belt is assembled on the pulley by the belt mounting fixture, the belt is guided and pressed against the belt guide surface by the belt guide surface.

[0010] Furthermore, the belt guide surface includes two corresponding to the two ends located at both ends of the belt guide surface along its length.

[0011] Furthermore, the belt lead-out surface is located between the two belt guide surfaces.

[0012] Furthermore, the belt mounting fixture has an inlet flange located on the outer side of the belt guide face;

[0013] When the belt is assembled on the pulley by the belt mounting fixture, the guide edge is used to prevent the belt from detaching from the belt guide face.

[0014] Furthermore, the belt mounting fixture has a guide edge that protrudes radially from the belt lead-out surface along the pulley, and the guide edge is located on the outer side of the belt lead-out surface; the thickness of the guide edge gradually increases inward along the rotation direction of the pulley.

[0015] Furthermore, the inner surface of the leading edge is inclined inward toward the axis of rotation of the pulley.

[0016] Furthermore, the belt installation fixture has an assembly groove that is radially outwardly fastened to the pulley, and the surface opposite to the bottom of the assembly groove forms the belt lead-out surface.

[0017] Furthermore, the belt mounting fixture is coaxially assembled with the pulley, and the belt inlet surface and belt outlet surface are arranged radially opposite to each other on the pulley.

[0018] Furthermore, the belt inlet surface is an arc surface I with its center on the pulley rotation axis, and the belt outlet surface is an arc surface II with its center on the pulley rotation axis.

[0019] Furthermore, the front surface of the belt guide is a plane tangent to the end of the arc surface I, and the two front surfaces of the belt guide are connected to the two ends of the arc surface I respectively.

[0020] Furthermore, the arc surface I and arc surface II are parallel to the outer circular surface of the pulley.

[0021] Furthermore, the belt mounting fixture is provided with an auxiliary rotating shaft, the central axis of which coincides with the central axis of the pulley.

[0022] Furthermore, the belt mounting fixture has a positioning part for assembling and positioning with the pulley.

[0023] Furthermore, the belt mounting fixture has a clearance portion for avoiding the existing structure of the pulley.

[0024] Furthermore, the belt installation fixture includes an inlet section with an arc surface I and an outlet section with an arc surface II. The inlet section and the outlet section are assembled in a detachable manner, and the positioning part is located on the inlet section.

[0025] The beneficial effects of this utility model are as follows: The belt installation fixture for pulleys disclosed in this utility model, through the setting of a belt inlet surface and a belt outlet surface, enables the belt to be introduced into the belt installation fixture by the belt inlet surface, whose radial dimension is smaller than the radius of the pulley, under the rotation of the belt installation fixture installed on the pulley. Subsequently, during the rotation of the belt installation fixture, the belt gradually transitions to the belt outlet surface, whose radial dimension is not smaller than the radius of the pulley. As the rotation continues, the belt is then directly introduced into the belt groove of the pulley from the belt outlet surface for assembly. This allows for quick and easy assembly of the belt into the belt groove of the pulley without damaging the pulley, resulting in better quality. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0027] Figure 1 is a schematic diagram of the structure of this utility model;

[0028] Figure 2 is a schematic diagram of the inner structure of Figure 1 of this utility model;

[0029] Figure 3 is a schematic diagram of the AA-direction structure of this utility model as shown in Figure 2;

[0030] Figure 4 is a schematic diagram of the structure of this utility model with the introduction of a split design;

[0031] Figure 5 is a top view of the structure of the lead-out split of this utility model.

[0032] Reference numerals: 1. Belt lead-in surface, 2. Belt lead-out surface, 3. Belt guide surface, 4. Lead-in edge, 5. Lead-out edge, 6. Assembly groove, 7. Auxiliary shaft, 8. Positioning hole, 9. Clearance part, 101. Lead-in part, 102. Detailed Implementation

[0033] Figures 1 to 5 are schematic diagrams of the structure of this utility model. As shown in the figures, the belt mounting fixture for the pulley in this embodiment has a belt inlet surface 1 and a belt outlet surface 2 located radially on the pulley. The distance between the belt inlet surface 1 and the rotation axis of the pulley is less than the radius of the pulley; the distance between the belt outlet surface 2 and the rotation axis of the pulley is not less than the radius of the pulley; and the sum of the distances between the belt inlet surface 1 and the rotation axis of the pulley and the distances between the belt outlet surface 2 and the rotation axis of the pulley does not exceed the diameter of the pulley. When the belt is assembled on the pulley by the belt mounting fixture, the belt mounting fixture is set on the pulley. The belt mounting fixture can be driven to rotate and assembled on the pulley, or fixed to the pulley, or, in this solution, the belt tension force and the limiting structure of the pulley and the belt mounting fixture are used to make the belt mounting fixture approximately fixed to the pulley, etc., which will not be described in detail here. With the belt inlet surface 1 and belt outlet surface 2, the belt can be introduced onto the belt installation fixture by the belt inlet surface 1, whose radial dimension is smaller than the pulley radius, under the rotation of the belt installation fixture mounted on the pulley. Then, as the belt installation fixture rotates, the belt gradually transitions to the belt outlet surface 2, whose radial dimension is not smaller than the pulley radius. As the rotation continues, the belt is then directly introduced into the belt groove of the pulley from the belt outlet surface 2. This allows for quick and easy assembly of the belt into the belt groove of the pulley without damaging the pulley, resulting in better quality.

[0034] In this embodiment, the belt mounting fixture also has a belt guide surface 3 located radially to the pulley, which is situated between the belt inlet surface 1 and the belt outlet surface 2. When the belt is assembled onto the pulley via the belt mounting fixture, the belt is guided and pressed against the belt guide surface 3 through the belt inlet surface 1. It should be understood that the belt has a certain elastic deformation capacity. When assembled onto the pulley via the belt mounting fixture, the belt continuously presses against the corresponding surface of the belt mounting fixture. For example, it is pressed against the belt inlet surface 1 during the belt inlet process, pressed against the belt guide surface 3 during the belt transition from the belt inlet surface 1 to the belt outlet surface 2, and pressed against the belt outlet surface 2 during the belt exit process, etc., which will not be elaborated further here. The belt guide surface 3 is used to further restrict the belt position, increase the contact area between the belt mounting fixture and the belt, and facilitate the efficient guidance of the belt into the belt groove of the pulley by the belt mounting fixture.

[0035] In this embodiment, the belt guide surface 3 includes two sections located at opposite ends of the belt guide surface 1 along its length. This ensures the belt is reliably mounted on the belt installation fixture with tension on both sides. During the belt's introduction into the belt groove, a preload is continuously applied, reducing the risk of the belt detaching from the installation fixture and improving installation efficiency.

[0036] In this embodiment, the belt lead-out surface 2 is located between the two belt guide surfaces 3. This further limits the range of the belt lead-out surface 2, reduces the redundancy design of the belt installation fixture, and prevents the belt from interfering with the belt introduction surface 1 when the belt is introduced into the belt installation fixture due to the excessive size of the belt lead-out surface 2, thus affecting assembly efficiency and reducing the adverse factors of the belt being introduced into the belt installation fixture.

[0037] In this embodiment, the belt mounting fixture has a guide edge 4 located outside the belt guide surface 3. When the belt is assembled onto the pulley via the belt mounting fixture, the guide edge prevents the belt from detaching from the belt guide surface. The end of the guide edge 4 near the belt guide surface 1 does not extend radially beyond the belt guide surface 1 on the pulley. "Outside" refers to the direction away from the pulley axially after the belt mounting fixture is assembled onto the pulley; the directions inside and outside are opposite and will not be described further here. The guide edge 4 further guides the belt within the belt mounting fixture, preventing the belt from detaching from the fixture during rotation, thus improving the assembly efficiency of the belt on the pulley.

[0038] In this embodiment, the belt installation fixture has a guide edge 5 that protrudes radially from the belt lead-out surface 2 along the pulley. The guide edge 5 is located on the outer side of the belt lead-out surface 2. Along the rotation direction of the pulley, the thickness of the guide edge 5 gradually increases inward. That is, the inner side of the guide edge 5 cooperates with the belt lead-out surface 2, so that the belt is guided into the belt groove. More specifically, when the belt passes the side of the guide edge 5 on the belt lead-out surface 2, the guide edge 5, whose thickness gradually increases inward, actively guides the belt into the belt groove of the pulley. The belt can be introduced into the belt groove without the aid of auxiliary tools, reducing the difficulty of operation and improving the quality of the finished product.

[0039] In this embodiment, the inner surface of the outlet edge 5 is inclined inward toward the axis of rotation of the pulley. More specifically, the inner surface of the outlet edge 5 is a curved surface that smoothly transitions to the top surface of the outlet edge 5, and the end of the outlet edge 5 near the belt inlet is a rounded curved surface that is inclined toward the belt inlet side, which is more conducive to the belt passing smoothly through the outlet edge 5 and being guided into the belt groove.

[0040] In this embodiment, the belt mounting fixture has an assembly groove 6 that is radially outwardly fastened to the pulley, and the surface opposite to the bottom of the assembly groove 6 forms a belt lead-out surface 2. The belt mounting fixture is externally fastened to the pulley through the assembly groove 6, and the part of the belt mounting fixture with the assembly groove 6 has an arc-shaped structure that conforms to the outer contour of the pulley, and the assembly groove 6 also conforms to the outer contour of the pulley at the assembly position.

[0041] Furthermore, the belt lead-out surface 2 is also conforming to the outer contour of the pulley, making the belt lead-out surface 2 an arc surface. This arc surface is approximately continuous with the radial outer contour of the pulley. Under the continuous pressure of the pre-tension force during belt assembly, it is beneficial to smoothly and reliably guide the belt into the belt groove.

[0042] In this embodiment, the belt mounting fixture and the pulley are coaxially assembled, and the guiding center of the belt is continuously located on the axis of the pulley. The shape of the belt is conducive to its maintenance, resulting in higher belt assembly efficiency. This structure also facilitates the rotational force application of the overall structure. Furthermore, the belt mounting fixture is provided with an auxiliary rotating shaft 7, the central axis of which coincides with the central axis of the pulley. The auxiliary rotating shaft 7 is detachably mounted on the belt mounting fixture. One end of the auxiliary rotating shaft 7 is a flat rectangular structure that is inserted into a flat rectangular groove on the belt mounting fixture. The two are assembled and cannot rotate relative to each other. The other end of the auxiliary rotating shaft 7 is a hexagonal connecting end, used to connect with other power equipment to provide the force to rotate the belt mounting fixture, thereby driving the belt to be guided to the pulley. Of course, after the belt mounting fixture and the pulley are coaxially assembled, the auxiliary rotating shaft 7 may not be provided. The rotation of the belt's driving pulley can be used to drive the belt mounting fixture to rotate, which can also achieve the purpose of guiding the belt into the belt groove. This will not be elaborated further here.

[0043] In this embodiment, the belt inlet surface 1 and the belt outlet surface 2 are arranged radially opposite to each other on the pulley to prevent interference during belt assembly, improve belt assembly efficiency, and increase the corresponding length of the belt guide surface 3, thereby improving belt assembly reliability.

[0044] In this embodiment, the belt inlet surface 1 is an arc surface I centered on the pulley's rotation axis, and the belt outlet surface 2 is an arc surface II centered on the pulley's rotation axis. The arc angles corresponding to arc surface I and arc surface II each do not exceed 180°; however, the arc angle corresponding to arc surface II should not be too small, allowing for a longer length of arc surface II, thus facilitating a stable and reliable belt outlet to the belt groove. More specifically, the arc angle corresponding to arc surface II is an obtuse angle, ranging from 90° to 120°, and in this embodiment, it is 107°.

[0045] In this embodiment, arc surface I and arc surface II are parallel to the outer circular surface of the pulley; this facilitates the more stable guidance of the belt into the belt groove. Of course, arc surface I and arc surface II can also be set at corresponding angles to the outer circular surface of the pulley. For example, arc surface II can be set to be inclined inward, which is preferable to facilitate the guidance of the belt into the belt groove. This will not be elaborated further here.

[0046] The belt guide surface 3 is a plane tangent to the end of the arc surface I, and the two belt guide surfaces 3 are connected to the two ends of the arc surface I respectively. The flat guide surface is more conducive to bearing the belt, especially the belt guide surface 3 connected to the arc surface I on both sides, which is more conducive to keeping the belt stable during the process of guiding the belt into the belt groove. Of course, the guide surface can also be a partially convex arc surface or a wavy surface, etc., which will not be elaborated here.

[0047] In this embodiment, the belt mounting fixture has a positioning part for assembling and positioning with the pulley. In this solution, the positioning part includes a positioning hole 8 for adapting to the mounting bolts on the pulley. After the belt mounting fixture is assembled on the pulley, the bolts on the pulley are located in the positioning hole 8, which serves to prevent the belt mounting fixture from detaching from the pulley.

[0048] In this embodiment, the belt mounting fixture has a clearance part 9 for avoiding the existing structure of the pulley. In this solution, the clearance part 9 includes a groove formed by the outward indentation of the inner side of the belt mounting fixture. The clearance part 9 is located near the flat groove of the belt mounting fixture for assembling the flat surface, and the clearance part 9 does not interfere with the existing structure of the belt, thus ensuring the reliable installation of the belt mounting fixture on the pulley.

[0049] In this embodiment, the belt installation fixture includes an inlet section 101 with an arc surface I and an outlet section 102 with an arc surface II. The inlet section 101 and the outlet section 102 are assembled in a detachable manner. The preferred detachable method is bolt connection, with a gasket provided on the assembly surface. The detachable method can also be snap-fit ​​or pin connection, etc., which will not be elaborated here. The split structure can be applied to batches of pulleys with tolerances within a certain range, and has stronger versatility. Moreover, the split structure is easier to process and has lower molding difficulty.

[0050] The mounting positions of the positioning part, the avoidance part 9, and the auxiliary rotating shaft 7 are located on the inlet section 101, and the arc surface I and the belt guide front surface 3 are formed on the inlet section 101. More specifically, the inlet section 101 and the outlet section 102 are assembled in an upper and lower segmented manner. The arc surface I is formed by protruding downward from the bottom surface of the inlet section 101. The belt guide front surface 3 is formed on both sides of the tooling section. The inlet edge 4 is formed by extending outward from the side of the tooling section, and the end face of the inlet edge 4 close to the belt guide front surface 3 smoothly transitions with the belt guide front surface 3. The arc surface II is formed by protruding upward from the top surface of the outlet section 102. The arc surface II protrudes upward to form the outlet edge 5. The inner side of the outlet section 102 also forms an assembly groove 6. The surface opposite to the bottom of the assembly groove 6 is connected to the arc surface II.

[0051] 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A belt mounting fixture for pulleys, characterized in that: The belt installation fixture has a belt inlet surface and a belt outlet surface located radially to the pulley; the distance between the belt inlet surface and the rotation axis of the pulley is less than the radius of the pulley; the distance between the belt outlet surface and the rotation axis of the pulley is not less than the radius of the pulley; when the belt is assembled on the pulley by the belt installation fixture, the belt installation fixture is set on the pulley, the belt is introduced into the belt installation tool by the belt inlet surface as the belt installation fixture rotates, and the belt is led out into the belt groove of the pulley by the belt outlet surface.

2. The belt mounting fixture for pulleys according to claim 1, characterized in that: The belt mounting fixture also has a belt guide face located between the belt inlet face and the belt outlet face; when the belt is assembled on the pulley by the belt mounting fixture, the belt is guided and pressed against the belt guide face by the belt inlet face.

3. The belt mounting fixture for pulleys according to claim 1, characterized in that: The belt mounting fixture has an inlet flange located on the outer side of the belt guide face; when the belt is assembled on the pulley by the belt mounting fixture, the inlet flange is used to prevent the belt from detaching from the belt guide face.

4. The belt mounting fixture for pulleys according to claim 1, characterized in that: The belt mounting fixture has a guide edge that protrudes radially from the belt lead-out surface along the pulley, and the guide edge is located on the outer side of the belt lead-out surface; the thickness of the guide edge gradually increases inward along the rotation direction of the pulley.

5. The belt mounting fixture for pulleys according to claim 4, characterized in that: The inner surface of the outlet edge is inclined inward toward the axis of rotation of the pulley.

6. The belt mounting fixture for pulleys according to claim 1, characterized in that: The belt installation fixture has a mounting groove that is radially outwardly engaged with the pulley, and the surface opposite to the bottom of the mounting groove forms the belt lead-out surface.

7. The belt mounting fixture for pulleys according to claim 1, characterized in that: The belt mounting fixture is coaxially assembled with the pulley, and the belt inlet surface and belt outlet surface are arranged radially opposite to each other on the pulley.

8. The belt mounting fixture for pulleys according to claim 7, characterized in that: The belt inlet surface is an arc surface I with its center on the axis of rotation of the pulley, and the belt outlet surface is an arc surface II with its center on the axis of rotation of the pulley.

9. The belt mounting fixture for pulleys according to claim 7, characterized in that: The belt installation fixture is equipped with an auxiliary rotating shaft, the central axis of which coincides with the central axis of the pulley.

10. The belt mounting fixture for pulleys according to claim 1, characterized in that: The belt mounting fixture has a positioning part for assembling and positioning with the pulley.

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