Belt pulley capable of preventing belt from falling off

Abstract

The utility model provides a belt pulley capable of preventing a belt from falling off. The belt pulley comprises a belt pulley body, a side baffle, a side barrier strip, an adjusting plate and a spring, the side barrier strip and the side baffle are arranged on the front side and the rear side of the belt pulley body respectively, and the adjusting plate rotationally covers the outer side of the side barrier strip with the central axis of the belt pulley body as the axis. When a belt needs to be installed, the adjusting ring is rotated, due to the arrangement of the strip-shaped holes, the side blocking strips are driven to move towards the axis of the belt wheel body and retract into the sliding grooves, and at the moment, the belt wheel body can be sleeved with the belt; after installation, the adjusting plate is loosened, and the side blocking strip extends out of the sliding groove under the action of the spring, so that the belt is blocked; the side baffles and the side blocking strips jointly act to prevent the belt from falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of belt pulleys, and particularly relates to a belt pulley for preventing a belt from slipping off. Background Art

[0002] Belt pulleys belong to hub parts and are mainly used in occasions for transmitting power over a long distance, such as the output of power of small diesel engines, the transmission of power of agricultural machinery, speed reducers, generators, etc. Since belts are rubber products and have the characteristics of thermal expansion and contraction, in the case of higher temperatures in summer, the belts are prone to expansion and then slip off the belt pulleys when they are in a high-temperature state for a long time; it is also possible that when the belt pulley is in use, since the belt is not installed in place, the belt may slip off, thus affecting the normal use of the equipment. Content of the Utility Model

[0003] In view of this, the utility model aims to provide a belt pulley for preventing a belt from slipping off to solve the above problems.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A belt pulley for preventing a belt from slipping off includes a belt pulley body, side baffles, side stop strips, an adjusting plate and springs; the side stop strips and side baffles are respectively arranged on the front and rear sides of the belt pulley body, the side baffles are annular and are connected to the belt pulley body by bolts, several chutes extending along the radial direction are arranged on the front side wall of the belt pulley, the side stop strips are slidably arranged in the chutes, and springs connected to the side stop strips are also arranged in the chutes; the adjusting plate is annular, and the adjusting plate rotates around the central axis of the belt pulley body to cover the outside of the side stop strips. A limit pin is arranged on the side stop strip, and a strip-shaped hole for the limit pin to pass through is arranged on the adjusting plate, and the length extension direction of the strip-shaped hole forms an angle with the radial direction of the belt pulley.

[0006] Further, there are 4 chutes and they are evenly distributed.

[0007] Further, a limiting member for limiting the rotation of the adjusting plate is arranged on the adjusting plate.

[0008] Further, the limiting member is a neck ring, the neck ring is arranged on the inner side wall of the inner circle of the adjusting plate, and a step for sleeving the neck ring is arranged on the belt pulley body.

[0009] Further, a fixing groove is arranged on the side stop strip, and the limit pin is screwed in the fixing groove.

[0010] Further, a dial is also arranged on the adjusting plate.

[0011] Further, several belt grooves are arranged on the belt pulley body.

[0012] Furthermore, heat dissipation grooves are axially formed along the outer periphery of the pulley body and penetrate the surface of the pulley body axially.

[0013] Compared with the prior art, the pulley for preventing belt from slipping off of the present utility model has the following advantages:

[0014] The pulley for preventing belt from slipping off of the present utility model includes a pulley body, side baffles, side stoppers, an adjusting plate and a spring; the side stoppers and side baffles are respectively arranged on the front and rear sides of the pulley body, and the adjusting plate rotates around the central axis of the pulley body to cover the outside of the side stoppers. When installing the belt, rotate the adjusting ring. Due to the arrangement of the strip holes, the side stoppers are driven to move towards the axis of the pulley body and retract into the sliding grooves. At this time, the belt can be sleeved on the pulley body; after installation, release the adjusting plate, and under the action of the spring, the side stoppers extend out of the sliding grooves to block the belt; the side baffles and side stoppers work together to prevent the belt from slipping off. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0016] Figure 1 is a schematic structural diagram of the pulley for preventing belt from slipping off according to an embodiment of the present utility model;

[0017] Figure 2 is an exploded view of the pulley for preventing belt from slipping off according to an embodiment of the present utility model;

[0018] Figure 3 is a partial sectional view of the pulley for preventing belt from slipping off according to an embodiment of the present utility model.

[0019] DESCRIPTION OF THE REFERENCE NUMERALS:

[0020] 1, pulley body; 11, belt groove; 12, heat dissipation groove; 13, sliding groove; 2, side baffle; 3, side stopper; 31, fixing groove; 32, limit nail; 4, adjusting plate; 41, strip hole; 42, neck ring; 43, dial block; 5, spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0024] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0025] As Figures 1-3 shown, a pulley for preventing a belt from slipping off includes a pulley body 1, side baffles 2, side bars 3, an adjusting plate 4, and a spring 5; the side bars 3 and the side baffles 2 are respectively arranged on the front and rear sides of the pulley body 1. The side baffles 2 are annular and are connected to the pulley body 1 by bolts. A plurality of chutes 13 extending radially are provided on the front side wall of the pulley. The side bars 3 are slidably arranged in the chutes 13, and a spring 5 connected to the side bars 3 is further provided in the chutes 13; the adjusting plate 4 is annular, and the adjusting plate 4 rotates around the central axis of the pulley body 1 to cover the outside of the side bars 3. A limit nail 32 is provided on the side bars 3, and a strip hole 41 for the limit nail 32 to pass through is provided on the adjusting plate 4. The length extension direction of the strip hole 41 forms an angle with the radial direction of the pulley.

[0026] When installing the belt, rotate the adjusting ring. Due to the setting of the strip hole, the side bars are driven to move towards the axis of the pulley body, so that they retract into the chutes. At this time, the belt can be sleeved on the pulley body; after installation, release the adjusting plate, and under the action of the spring, the side bars extend out of the chutes, thus blocking the belt; the combined action of the side baffles and the side bars prevents the belt from slipping off.

[0027] Exemplarily, there are 4 sliding grooves 13 and they are evenly distributed.

[0028] Exemplarily, a limiting member for restricting the rotation of the adjusting plate 4 is provided on the adjusting plate 4.

[0029] Specifically, the limiting member is a neck ring 42. The neck ring 42 is arranged on the inner sidewall of the inner circle of the adjusting plate 4, and a step for sleeving the neck ring 42 is provided on the pulley body 1.

[0030] Exemplarily, a fixing groove 31 is provided on the side baffle 3, and a limiting nail 32 is screwed in the fixing groove 31.

[0031] Exemplarily, a dial block 43 is further provided on the adjusting plate 4 to facilitate turning the adjusting plate.

[0032] Exemplarily, a plurality of belt grooves 11 are provided on the pulley body 1.

[0033] Exemplarily, a heat dissipation groove 12 is axially formed on the outer periphery of the pulley body 1 along the axial direction of the pulley body 1, and the heat dissipation groove 12 axially penetrates the surface of the pulley body 1. The heat generated by the belt friction can be dissipated along the axial direction through the heat dissipation groove.

[0034] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pulley for preventing a belt from coming off, characterized in that: It includes a pulley body, a side baffle, a side baffle strip, an adjustment plate and a spring; the side baffle strip and the side baffle strip are respectively arranged on the front and rear sides of the pulley body, the side baffle strip is annular and is connected to the pulley body by bolts, the front side wall of the pulley is provided with a plurality of slide grooves extending along its radial direction, the side baffle strip is slidably arranged in the slide groove, and a spring connected to the side baffle strip is also arranged in the slide groove; the adjustment plate is annular, and the adjustment plate rotates around the central axis of the pulley body and covers the outer side of the side baffle strip, the side baffle strip is provided with a limiting nail, and the adjustment plate is provided with a strip hole for the limiting nail to pass through, and the length extension direction of the strip hole forms an angle with the radial direction of the pulley.

2. The pulley for preventing a belt from coming off according to claim 1, characterized in that: There are 4 chutes and they are evenly distributed.

3. The pulley for preventing a belt from coming off according to claim 1, characterized in that: A limiting piece is arranged on the adjusting plate to limit the rotation of the adjusting plate.

4. The pulley for preventing a belt from coming off according to claim 3, characterized in that: The limiting member is a neck ring, which is arranged on the inner ring side wall of the adjusting plate, and a step for sleeve-mounting the neck ring is arranged on the pulley body.

5. The pulley for preventing a belt from coming off according to claim 1, characterized in that: A fixing groove is arranged on the side baffle bar, and the limiting nail is screwed in the fixing groove.

6. The pulley for preventing a belt from coming off according to claim 1, characterized in that: A dial block is also provided on the adjusting plate.

7. The pulley for preventing a belt from coming off according to claim 1, characterized in that: A plurality of belt grooves are arranged on the pulley body.

8. The pulley for preventing a belt from coming off according to claim 1, characterized in that: The outer periphery of the pulley body is provided with a heat dissipation groove along the axial direction of the pulley body, and the heat dissipation groove penetrates the surface of the pulley body in the axial direction.

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