CN104976296B - belt installation tool - Google Patents

Abstract

A belt installation tool comprising: the eccentric rotating part is provided with a circumferential belt supporting surface and first and second axial end surfaces which are oppositely arranged, and the belt supporting surface is divided into a first belt supporting surface and a second belt supporting surface along the circumferential direction; the anti-torsion connecting part is fixedly arranged on the first end surface, the axis of the anti-torsion connecting part is used as the rotation axis of the eccentric rotating part, and the rotating radiuses of the first belt bearing surface and the second belt bearing surface are respectively smaller than or equal to the radius of the rim of the belt pulley; the rotating operation part is fixedly arranged on the second end face and is used for being matched with the rotating installation tool to drive the eccentric rotating part to rotate; set firmly in the second belt supporting surface and along the push-in portion of eccentric rotating part circumference extension, push-in portion has the belt and pushes the face, and the belt pushes the face and is equipped with the one side of antitorque connecting portion towards eccentric rotating part, and the belt pushes away the face and keeps away from the rotation operation portion gradually on the axial direction from eccentric rotating part to antitorque connecting portion. The problem of current belt mounting tool structure comparatively complicated is solved.

Description

belt installation tool

technical field

The present invention relates to a belt installation tool.

Background technique

A belt drive is a commonly used mechanical power transmission device, which includes multiple (at least two) pulleys and a belt that is sleeved on the pulleys and engaged with the pulley grooves. When assembling a belt drive, use the belt installation tool to gradually snap the belt into the pulley groove.

There are many kinds of belt installation tools in the prior art. For example, the European patent document with the publication number EP0831247B1, the US patent document with the publication number US4193310, and the publication number CN1471614A all disclose a belt installation tool. However, the existing belt installation tools all have the following problems: 1) the structure is relatively complicated; 2) the belt will be turned up during the belt installation process so that the belt will fall out, resulting in low installation efficiency; 2) the belt installation process There will be a problem that the belt crosses the groove so that the belt is damaged.

Contents of the invention

The problem to be solved by the present invention is that the structure of the existing belt installation tool is relatively complicated.

Another problem to be solved by the present invention is: when using the existing belt installation tool to install the belt, there will be a problem that the belt will come out so that the belt will come out, resulting in low installation efficiency.

Another problem to be solved by the present invention is: when using the existing belt installation tool to install the belt, the belt will cross the groove and cause the belt to be damaged.

In order to solve the above problems, the present invention provides a belt installation tool, comprising:

The eccentric rotating part has a circumferential belt bearing surface and opposite axial first and second end surfaces, and the belt bearing surface is divided into a first belt bearing surface and a second belt bearing surface along the circumferential direction;

A torsion-resistant connection part fixed on the first end surface and used to realize the torsion-proof connection between the eccentric rotation part and the pulley, the axis of the torsion-proof connection part serves as the rotation axis of the eccentric rotation part, and the first belt The radius of rotation of the support surface is smaller than the radius of the pulley rim, and the radius of rotation of the second belt support surface is equal to the radius of the pulley rim;

a rotation operation part fixed on the second end surface, the rotation operation part is used to cooperate with a rotation installation tool to drive the eccentric rotation part to rotate;

a push-in portion fixed on the second belt supporting surface and extending circumferentially along the eccentric rotation portion, the push-in portion has a belt push-in surface facing the eccentric rotation portion On one side of the anti-torsion connection part, the belt push-in surface gradually moves away from the rotation operation part in the axial direction from the eccentric rotation part to the anti-torsion connection part.

Optionally, one end of the push-in portion also extends circumferentially along the eccentric rotation portion to the first belt bearing surface, and in the axial direction from the eccentric rotation portion to the anti-torque connection portion, the push-in portion One end of the portion extending to the first belt bearing surface is farther from the torsionally fixed connection than the other end.

Optionally, in the axial direction from the eccentric rotating portion to the torsion-proof connecting portion, the radius of rotation of the first belt bearing surface gradually increases.

Optionally, it also includes a belt blocking portion fixed on the second end surface, the belt blocking portion protrudes outside the second end surface in the radially outward direction of the eccentric rotating portion, and has a The pressing portion at the outer end is at least opposite to part of the first belt supporting surface along the radial direction of the eccentric rotating portion.

Optionally, the belt blocking part has two fixing parts fixed on the second end surface, and the fixing parts protrude outside the second end surface in the radially outward direction of the eccentric rotating part. The pressing part is located on the radially outer side of the two fixing parts and is fixedly arranged with the radially outer ends of the two fixing parts.

Optionally, the fixing part is fixed on the second end surface by bolts.

Optionally, the two fixing parts form 90 degrees to each other, and the pressing part is arc-shaped.

Optionally, it also includes a guide part fixed on the first end face and located radially inside the second belt bearing surface, the guide part has a direction away from the first end face from the boundary of the first end face Extended guide surface.

Optionally, the anti-torsion connection part is a sleeve with key grooves on the inner peripheral surface.

Optionally, the rotating operation part is a ratchet sleeve.

Compared with the prior art, the technical solution of the present invention has the following advantages:

By setting a fixed eccentric rotating part, anti-torsion connection part, rotating operation part and push-in part in the belt installation tool, the installation of the belt can be realized in the following way: On the one hand, through the cooperation of the rotation installation tool and the rotation operation part Drive the eccentric rotating part to gradually expand the belt set on the belt supporting surface until the belt opening radius is equal to the radius of the pulley rim; on the other hand, while driving the belt to open, the belt pushing surface of the pushing part will gradually Push the belt sideways into the pulley groove. Compared with the existing belt installation tool, the structure of the belt installation tool in the technical solution of the present invention is simpler.

Further, the belt installation tool also includes a belt stopper. During the process of installing the belt, when the eccentric rotation part rotates to the position where the belt is supported on the second belt bearing surface, the pressing part of the belt stopper can rotate to the position of the two pulleys. between and press the belt that is not set on the two pulleys, so as to prevent the problem that the belt is turned up and the belt comes out, and the belt installation efficiency is improved.

Further, the belt installation tool also includes a guide part with a guide surface. During the process of installing the belt, when the belt pushing surface of the push-in part gradually pushes the belt away from the second belt supporting surface, the belt can pass through the guide surface of the guide part. Slowly slide into the pulley groove, preventing the belt from crossing the groove during the belt installation process and causing damage to the belt.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a belt installation tool in an embodiment of the present invention;

Fig. 2 is a projection view seen from the first end face of the eccentric rotating part in Fig. 1;

Fig. 3 is a projected view seen from the belt supporting surface of the eccentric rotating part in Fig. 1 .

detailed description

In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 1 , the belt installation tool 100 of this embodiment includes an eccentric rotation part 1 , a torsion-resistant connection part 2 , a rotation operation part 3 and a push-in part 5 .

The eccentric rotating part 1 has a circumferential belt bearing surface, and an opposite axial first end surface S1 and a second end surface S2. The belt bearing surface is divided into a first belt bearing surface S3 and a second belt bearing surface S4 along the circumferential direction. .

As shown in FIG. 2 and FIG. 3 , the anti-torsion connection part 2 is fixed on the first end surface S1 and is used to realize the anti-torsion connection between the eccentric rotating part 1 and the pulley 6 . The axis of the torsion-proof connection part 2 serves as the rotation axis of the eccentric rotating part 1, the rotation radius of the first belt bearing surface S3 is smaller than the radius of the pulley rim, and the rotation radius of the second belt bearing surface S4 is equal to the radius of the pulley rim.

In this embodiment, the anti-torsion connection part 2 is a sleeve provided with a keyway on the inner peripheral surface. When the sleeve is set on the shaft of the pulley 6, the anti-torsion between the eccentric rotating part 1 and the pulley 6 can be realized. connected so that the eccentric rotating part 1 and the pulley 6 can rotate synchronously. In other embodiments, other structural forms of the torsion-proof connection part 2 may also be used to realize the torsion-proof connection between the eccentric rotating part 1 and the pulley 6 .

As shown in FIG. 2 and FIG. 3 , the rotation operation part 3 is fixed on the second end surface S2 and used to cooperate with the rotation installation tool 4 to drive the eccentric rotation part 1 to rotate. In this embodiment, the rotating operation part 3 is a ratchet sleeve, and the rotating installation tool 4 is a ratchet wrench. By embedding the head of the ratchet wrench in the hole of the ratchet wrench and turning the ratchet wrench, the eccentric rotating part can be driven 1 rotates synchronously with belt pulley 6. In other embodiments, the rotation operation part 3 and the corresponding rotation installation tool 4 in other structural forms may also be used to realize the synchronous rotation of the eccentric rotation part 1 and the pulley 6 .

As shown in FIG. 3 , the push-in part 5 is fixed on the second belt supporting surface S4 and extends circumferentially along the eccentric rotation part 1 , the push-in part 5 has a belt push-in surface S5 , and the belt push-in surface S5 faces the eccentric rotation part 1 On the side where the anti-twist connection part 2 is provided, the belt push-in surface S5 is gradually away from the rotation operation part 3 in the axial direction from the eccentric rotation part 1 to the anti-twist connection part 2 .

In this embodiment, the steps of installing a belt by the belt installation tool 100 will be described below by taking the installation of a belt on two pulleys as an example. When the belt needs to be installed on three or more pulleys, the following steps for installing the belt can be adjusted accordingly.

As shown in FIG. 1 and FIG. 3 , the steps for installing the belt using the belt installation tool 100 are as follows:

The belt installation tool 100 is torsionally connected to the pulley 6 through the torsion-resistant connection part 2, and the belt push-in surface S5 of the push-in part 5 faces the pulley 6. Since the belt push-in surface S5 is from the eccentric rotation part 1 to the torsion-proof connection part 2 The axial direction of the belt gradually moves away from the rotating operation part 3, so the belt push-in surface S5 will gradually approach the pulley 6 in the axial direction from the eccentric rotating part 1 to the anti-torque connecting part 2;

One end of the belt 7 is sleeved on the first belt supporting surface S3 of the eccentric rotating part 1, and the other end is sleeved in the pulley groove of another pulley (not shown). Since the rotation radius of the first belt supporting surface S3 is less than The radius of the pulley rim, so the belt 7 is in a loose state at this time;

Rotating the rotating installation tool 4 drives the eccentric rotating part 1 and the pulley 6 to rotate synchronously according to the direction shown by arrow A in Fig. 3, so that the belt 7 previously supported on the first belt supporting surface S3 is gradually supported on the second belt supporting surface S4, Since the radius of rotation of the second belt supporting surface S4 is equal to the radius of the pulley rim, when the belt 7 is supported on the second belt supporting surface S4, the belt 7 will be opened and in a tensioned state. The radius is also equal to the pulley rim radius;

While the eccentric rotating part 1 and the pulley 6 rotate synchronously according to the direction shown by arrow A in FIG. And gradually push the belt 7 along the direction B towards the pulley 6, so that the belt 7 is slowly separated from the second belt supporting surface S4, when the part of the belt pushing surface S5 closest to the pulley 6 is in contact with the belt 7, the position The belt 7 is completely separated from the second belt supporting surface S4 and is set in the pulley groove. As the rotation angle of the eccentric rotating part 1 gradually increases, more and more parts of the belt 7 will be set in the pulley groove until the belt 7 Fully nested between two pulleys.

It can be seen from the above that the technical solution of this embodiment has the following advantages: by setting a fixed eccentric rotation part, a torsion-resistant connection part, a rotation operation part and a push-in part in the belt installation tool, the installation of the belt can be realized in the following manner : On the one hand, through the cooperation of the rotating installation tool and the rotating operation part, the eccentric rotating part is driven to gradually expand the belt set on the belt supporting surface until the opening radius of the belt is equal to the radius of the pulley rim; on the other hand, when driving the belt While opening, the belt pushing surface of the pushing part will gradually push the belt laterally into the pulley groove. Compared with the existing belt installation tool, the structure of the belt installation tool in the technical solution of this embodiment is simpler.

In this embodiment, as shown in FIG. 1 , one end of the push-in part 5 also extends along the circumferential direction of the eccentric rotating part 1 to the first belt supporting surface S3, and in the axial direction from the eccentric rotating part 1 to the torsion-resistant connecting part 2 , one end of the push-in portion 5 extending to the first belt bearing surface S3 is further away from the torsionally fixed connection portion 2 than the other end.

In this embodiment, in the axial direction from the eccentric rotating part 1 to the torsion-resistant connecting part 2, the radius of rotation of the first belt supporting surface S3 gradually increases, so that when the belt is sheathed on the first belt supporting surface S3, it can It is defined between one end of the push-in portion 5 extending to the first belt supporting surface S3 and the first belt supporting surface S3, so that the belt is not easy to fall off from the first belt supporting surface S3. In other embodiments, in the axial direction from the eccentric rotating part 1 to the torsion-proof connecting part 2, the radius of rotation of the first belt supporting surface S3 may also remain unchanged.

In this embodiment, as shown in FIG. 1 , the belt installation tool 100 further includes: a belt stopper 8 fixed on the second end surface S2, and the belt stopper 8 protrudes radially outward from the eccentric rotating part 1 at the first Outside the two end surfaces S2, there is a pressing portion 81 located at the radially outer end. Along the radial direction of the eccentric rotating unit 1, the pressing portion 81 is at least opposed to part of the first belt supporting surface S3. In this way, in the process of installing the belt, when the eccentric rotating part 1 rotates to the position where the belt is supported on the second belt supporting surface S4, the pressing part 81 of the belt blocking part 8 can rotate between the two pulleys, and Pressing the belt that is not set on the two pulleys prevents the belt from turning over and causing the belt to fall out, and improves the belt installation efficiency.

In this embodiment, the belt blocking part 8 has two fixing parts 82 fixed on the second end surface S2, the fixing parts 82 protrude outside the second end surface S2 along the radially outward direction of the eccentric rotating part 1, and the pressing part 81 Located on the radially outer side of the two fixing parts 82 and fixedly arranged with the radially outer ends of the two fixing parts 82, so that the part of the belt blocking part 8 between the two fixing parts 82 and the pressing part 81 forms a closed opening (not identified).

In the present embodiment, the two fixing parts 82 are 90 degrees to each other, and the pressing part 81 is arc-shaped, so that the outer contour of the belt blocking part 8 is generally fan-shaped.

In this embodiment, the fixing portion 82 is fixed on the second end surface S2 by bolts (not marked). In other embodiments, the fixing portion 82 may also be fixed on the second end surface S2 by other means, such as welding.

In this embodiment, as shown in FIG. 2 and FIG. 3 , the belt installation tool 100 further includes: a guide portion 9 fixed on the first end surface S1 and located radially inside the second belt support surface S4, the guide portion 9 has a The first end surface S1 is bounded by a guide surface 91 extending away from the first end surface S1, so that the distance between the guide surface 91 and the axis of the torsion-proof connection 2 is equal to the radius of rotation of the second belt bearing surface S4 and the pulley pulley edge radius. When the belt push-in surface S5 of the push-in part 5 gradually pushes the belt away from the second belt support surface S4, the belt can slowly slide into the pulley groove through the guide surface 91 of the guide part 9, which prevents the belt from collapsing during the belt installation process. There is a problem that the belt crosses the groove so that the belt is damaged.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention should be based on the scope defined in the claims.

Claims (9)

1. A belt installation tool, characterized in that, comprising: The eccentric rotating part has a circumferential belt bearing surface and opposite axial first and second end surfaces, and the belt bearing surface is divided into a first belt bearing surface and a second belt bearing surface along the circumferential direction; A torsion-resistant connection part fixed on the first end surface and used to realize the torsion-proof connection between the eccentric rotation part and the pulley, the axis of the torsion-proof connection part serves as the rotation axis of the eccentric rotation part, and the first belt The radius of rotation of the support surface is smaller than the radius of the pulley rim, and the radius of rotation of the second belt support surface is equal to the radius of the pulley rim; a rotation operation part fixed on the second end surface, the rotation operation part is used to cooperate with a rotation installation tool to drive the eccentric rotation part to rotate; a push-in portion fixed on the second belt supporting surface and extending circumferentially along the eccentric rotation portion, the push-in portion has a belt push-in surface facing the eccentric rotation portion On one side of the anti-torsion connection part, the belt push-in surface gradually moves away from the rotation operation part in the axial direction from the eccentric rotation part to the anti-torsion connection part; a guide portion fixed on the first end surface and located radially inside the second belt supporting surface, the guide portion has a guide surface extending from the boundary of the first end surface in a direction away from the first end surface, so The size of the guide portion in the circumferential direction of the eccentric rotation portion is smaller than that of the push-in portion, and the guide portion is disposed near an end of the push-in surface of the push-in portion that is away from the rotation operation portion. 2. The belt installation tool according to claim 1, characterized in that, one end of the push-in part also extends along the circumferential direction of the eccentric rotating part to the first belt supporting surface, from the eccentric rotating part to the anti- In the axial direction of the twist connection part, one end of the push-in part extending to the first belt bearing surface is further away from the torsion-resistant connection part than the other end. 3. The belt installation tool according to claim 2, characterized in that, in the axial direction from the eccentric rotating portion to the anti-torsion connection portion, the rotational radius of the first belt bearing surface gradually increases. 4. The belt installation tool according to claim 1, further comprising a belt blocking portion fixed on the second end surface, the belt blocking portion extending radially outward from the eccentric rotating portion Out of the second end surface, there is a pressing portion located at the radially outer end, and along the radial direction of the eccentric rotating portion, the pressing portion is at least opposite to a part of the first belt supporting surface. 5. The belt installation tool according to claim 4, wherein the belt blocking part has two fixing parts fixed on the second end surface, and the fixing parts are arranged along the radial direction of the eccentric rotating part. The outer direction protrudes outside the second end surface, and the pressing portion is located on the radially outer side of the two fixing portions and is fixedly arranged with the radially outer ends of the two fixing portions. 6. The belt installation tool according to claim 5, wherein the fixing part is fixed on the second end surface by bolts. 7. The belt installation tool according to claim 5, characterized in that, the two fixing parts are 90 degrees to each other, and the pressing part is arc-shaped. 8. The belt installation tool according to any one of claims 1 to 7, characterized in that, the anti-torsion connection part is a sleeve with a keyway on the inner peripheral surface. 9. The belt installation tool according to any one of claims 1 to 7, wherein the rotating operation part is a ratchet sleeve.