Belt pulley mounting structure

Abstract

The utility model relates to the technical field of belt pulley installation, and solves the problem of poor limiting effect on a belt pulley through a key and a key groove. The belt pulley installation structure comprises a power source and an output shaft arranged on the power source, a belt pulley is installed on the output shaft and comprises a hub and a shaft hole, a connecting column is installed between the shaft hole and the hub, and the front end and the rear end of the belt pulley limit the position of the belt pulley on the output shaft through the action of a clamping assembly. The clamping assembly comprises a first clamping plate and a second clamping plate, one end of the first clamping plate and one end of the second clamping plate are each provided with a clamping sleeve connected to the output shaft in a sleeving mode, the first clamping plate comprises a plate body and a plurality of clamping blocks arranged on the plate body in a protruding mode, the width of each clamping block is matched with the distance between every two adjacent connecting columns, and each clamping block is provided with a plurality of protruding columns; the second clamping plate comprises a base plate.

Description

Technical Field

[0001] The utility model relates to the technical field of pulley installation, in particular to a pulley installation structure. Background Art

[0002] The existing method of fixing the pulley and the rotating shaft of the cutting machine tool generally uses a flat key and a nut to clamp. This fixing method has the following disadvantages:

[0003] 1. It is necessary to machine keyways on the shaft and pulley, and also to machine threads for clamping. The difficulty of keyway machining is relatively increased, and the keyway has a great influence on the strength of the shaft;

[0004] 2. The actual fit between the key and the keyway usually has clearance or interference. When the two are in a clearance fit, there will be a backlash problem; when the two are in an interference fit, installation and disassembly are more difficult;

[0005] 3. Due to the existence of keys and keyways, the dynamic balance is usually not good, which can easily affect the stability of the chip cutting machine tool. Utility Model Content

[0006] In view of the shortcomings of the prior art, the utility model provides a pulley installation structure, which solves the problem that the limiting effect of the pulley by the key and the keyway is not good.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pulley installation structure, comprising a power source and an output shaft arranged on the power source, a pulley is installed on the output shaft, the pulley comprises a hub and an axial hole, a connecting column is installed between the axial hole and the hub, and the front and rear ends of the pulley limit the position of the pulley on the output shaft through the action of a clamping assembly;

[0008] The clamping assembly includes a first clamping plate and a second clamping plate, and one end of each of the first clamping plate and the second clamping plate is provided with a clamping sleeve sleeved on the output shaft;

[0009] The first clamping plate includes a plate body and a plurality of clamping blocks protruding from the plate body, the width of the clamping blocks is adapted to the spacing between adjacent connecting columns, and a plurality of protruding columns are installed on the clamping blocks;

[0010] The second clamping plate comprises a base plate, and the base plate is clamped between adjacent connecting columns through mounting protrusions, and a plurality of inner grooves are formed on the protrusions.

[0011] In one embodiment, the base plate is opposite to the plate body, and the clamping block and the protrusion extend symmetrically between adjacent connecting pillars, the protrusion is internally connected to the inner groove, and the side walls of the clamping block and the protrusion are both connected to the side walls of the connecting pillar;

[0012] The diameter of the protruding column is equal to the opening diameter of the inner groove and the position is adapted. The extension length of the protruding column on the clamping block is greater than the distance between the base plate and the plate body.

[0013] In one embodiment, the base plate and the plate body are provided with docking holes at the same position, and the docking holes penetrate the base plate and the plate body.

[0014] In one embodiment, the clamping sleeve includes a semicircular sleeve 1 and a semicircular sleeve 2 installed on the plate body and the base plate. The semicircular sleeve 1 and the semicircular sleeve 2 both have side panels extending forward and backward, and the side panels are provided with through holes.

[0015] In one embodiment, the diameter of the space enclosed by the semicircular sleeve 1 and the semicircular sleeve 2 is not greater than the diameter of the output shaft.

[0016] In one embodiment, the extension length of the protrusion on the substrate is greater than the extension length of the clamping block on the board body.

[0017] Compared with the prior art, the utility model provides a pulley installation structure, which has the following beneficial effects:

[0018] In the technical solution disclosed by the utility model, the first clamping plate and the second clamping plate are used to limit the pulley at the front and rear ends. When the key and the keyway are not used, the processing of the keyway on the output shaft or the pulley is avoided, thereby saving processing steps. In addition, the convex column and the inner groove arranged in the first clamping plate and the second clamping plate can enhance the bonding strength between the first clamping plate as a whole and the second clamping plate as a whole, thereby enhancing the left and right limiting effect on the pulley.

[0019] By arranging a clamping sleeve on the first clamping plate and the second clamping plate of the utility model, the clamping effect can be extended to the output shaft. By clamping the output shaft in the upper and lower directions by the clamping sleeve, the first clamping plate and the second clamping plate can be strengthened to maintain a stable position on the output shaft. In addition, the clamping sleeve itself is separated into two parts, and the combination of the two parts is controlled by bolts, which is convenient for later maintenance and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the clamping assembly of the utility model;

[0023] Figure 3This is a schematic diagram of the second splint structure of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the clamping sleeve of the utility model.

[0025] In the figure: 1. power source; 2. output shaft; 3. pulley; 31. hub; 32. shaft hole; 33. connecting column; 4. clamping assembly; 41. first clamping plate; 411. plate body; 412. clamping block; 413. convex column; 42. second clamping plate; 421. base plate; 422. convex block; 423. inner groove; 43. docking hole; 5. clamping sleeve; 51. semicircular sleeve one; 52. semicircular sleeve two; 53. side panel. DETAILED DESCRIPTION

[0026] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] Figure 1-Figure 4This is an embodiment of the utility model. The specific problem addressed by this specific embodiment is that when the engine is running, vibration will be generated, and the pulley 3 will also shift and move under the action of vibration, which will cause the pulley 3 to deviate from the central axis. When the pulley 3 deviates from the central axis during operation, it will cause the belt to wear eccentrically, break or even fall off, thereby affecting the normal operation of the water pump, generator, air conditioner and fan connected to the belt, and further causing the engine to not work normally. The existing fixing method of the pulley 3 and the rotating shaft generally uses a flat key to fix and a nut to clamp, but this fixing method has the following disadvantages: first, a keyway needs to be machined on the shaft and the pulley 3, and a thread for pressing needs to be machined. The difficulty of keyway machining is relatively increased, and the keyway has a great influence on the strength of the shaft. Secondly, the actual fit between the key and the keyway is usually clearance or interference. When the two are clearance-fitted, there will be a reverse clearance problem; when the two are interference-fitted, installation and disassembly are more difficult. Due to the presence of the key and the keyway, the dynamic balance is usually not good, which is easy to affect the stability of the chip cutting machine. Based on the above existing problems, this scheme proposes a pulley installation structure. By utilizing the first clamping plate 41 and the second clamping plate 42 to limit the pulley 3 at the front and rear ends, when the key and keyway are not used, the processing of the keyway on the output shaft 2 or the pulley 3 is avoided, thereby saving processing steps. In addition, the boss 413 and the inner groove 423 arranged in the first clamping plate 41 and the second clamping plate 42 can enhance the bonding strength between the first clamping plate 41 as a whole and the second clamping plate 42 as a whole, thereby enhancing the left and right limiting effect on the pulley 3.

[0029] A pulley installation structure described in the present scheme is specifically based on an external power source 1 and an output shaft 2 arranged on the power source 1. The pulley 3 is arranged on the output shaft 2 in the same way as in the prior art. The installation structure described in this embodiment is suitable for a single model of pulley 3. The specific pulley 3 includes a hub 31 and an axial hole 32. A connecting column 33 is installed between the axial hole 32 and the hub 31. The front and rear ends of the pulley 3 limit the position of the pulley 3 on the output shaft 2 through the action of the clamping assembly 4. The clamping assembly 4 generates a limiting effect by setting a structure that is engaged between adjacent connecting columns 33.

[0030] The clamping assembly 4 includes a first clamping plate 41 and a second clamping plate 42. One end of each of the first clamping plate 41 and the second clamping plate 42 is provided with a clamping sleeve 5 sleeved on the output shaft 2. The first clamping plate 41 includes a plate body 411 and a plurality of clamping blocks 412 protruding from the plate body 411. The width of the clamping blocks 412 is adapted to the spacing between adjacent connecting columns 33. The clamping blocks 412 are provided with a plurality of protruding columns 413. The second clamping plate 42 includes a base plate 421. The base plate 421 is clamped between adjacent connecting columns 33 by installing protruding blocks 422. The protruding blocks 422 are provided with a plurality of inner grooves 423. The extension length of the protruding blocks 422 on the base plate 421 is greater than the extension length of the clamping blocks 412 on the plate body 411. A clamping sleeve 5 is provided on the first clamping plate 41 and the second clamping plate 42 to extend the clamping effect to the output shaft 2. The clamping sleeve 5 can enhance the stability of the position of the first clamping plate 41 and the second clamping plate 42 on the output shaft 2 by clamping the output shaft 2 in both the up and down directions. In addition, the clamping sleeve 5 is separated into two parts by itself, and the combination of the two parts is controlled by bolts, which is convenient for later maintenance and disassembly. The base plate 421 is opposite to the plate body 411, and the clamping block 412 and the protrusion 422 extend symmetrically between the adjacent connecting columns 33. The protrusion 413 is internally connected to the inner groove 423, and the clamping The side walls of the block 412 and the protrusion 422 are both connected to the side walls of the connecting column 33. The diameter of the protrusion 413 is equal to the opening diameter of the inner groove 423 and the position is adapted. The extension length of the protrusion 413 on the clamping block 412 is greater than the distance between the base plate 421 and the plate body 411. The base plate 421 and the plate body 411 are provided with docking holes 43 at the same position. The docking holes 43 penetrate the base plate 421 and the plate body 411. When in use, the spiral is screwed into the docking hole 43 of the base plate 421 and penetrates the docking hole 43 of the plate body 411 to achieve docking between the base plate 421 and the plate body 411.

[0031] The clamping sleeve 5 includes a semicircular sleeve 1 51 and a semicircular sleeve 2 52 installed on the plate body 411 and the base plate 421. The semicircular sleeve 1 51 and the semicircular sleeve 2 52 are both provided with side plates 53 extending forward and backward. The side plates 53 are provided with through holes. The diameter of the space enclosed by the semicircular sleeve 1 51 and the semicircular sleeve 2 52 is not greater than the diameter of the output shaft 2. According to the diameter of the output shaft 2, the spiral is screwed into the through hole and the semicircular sleeve 1 51 and the semicircular sleeve 2 52 are connected, thereby completing the clamping of the clamping sleeve 5 on the output shaft 2.

[0032] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pulley installation structure, comprising a power source (1) and an output shaft (2) arranged on the power source (1), a pulley (3) being installed on the output shaft (2), the pulley (3) comprising a hub (31) and an axial hole (32), a connecting column (33) being installed between the axial hole (32) and the hub (31), characterized in that: The front and rear ends of the belt pulley (3) are limited in position on the output shaft (2) by the action of a clamping assembly (4); The clamping assembly (4) comprises a first clamping plate (41) and a second clamping plate (42), and one end of each of the first clamping plate (41) and the second clamping plate (42) is provided with a clamping sleeve (5) sleeved on the output shaft (2); The first clamping plate (41) comprises a plate body (411) and a plurality of clamping blocks (412) protruding from the plate body (411); the width of the clamping blocks (412) is adapted to the spacing between adjacent connecting columns (33); and a plurality of protruding columns (413) are mounted on the clamping blocks (412); The second clamping plate (42) comprises a base plate (421), the base plate (421) is clamped between adjacent connecting columns (33) via mounting protrusions (422), and a plurality of inner grooves (423) are formed on the protrusions (422).

2. A pulley installation structure according to claim 1, characterized in that: The base plate (421) is opposite to the plate body (411), and the clamping block (412) and the protrusion (422) extend symmetrically between adjacent connecting columns (33), the protrusion (413) is internally connected to the inner groove (423), and the side walls of the clamping block (412) and the protrusion (422) are both connected to the side walls of the connecting column (33); The diameter of the convex column (413) is equal to the opening diameter of the inner groove (423) and the position is adapted, and the extension length of the convex column (413) on the clamping block (412) is greater than the distance between the base plate (421) and the plate body (411).

3. A pulley installation structure according to claim 2, characterized in that: The base plate (421) and the plate body (411) are provided with docking holes (43) at the same position, and the docking holes (43) penetrate the base plate (421) and the plate body (411).

4. A pulley installation structure according to claim 1, characterized in that: The clamping sleeve (5) comprises a semicircular sleeve 1 (51) and a semicircular sleeve 2 (52) which are mounted on the plate body (411) and the base plate (421); side plates (53) are extended forward and backward on the semicircular sleeve 1 (51) and the semicircular sleeve 2 (52); and through holes are formed on the side plates (53).

5. A pulley installation structure according to claim 4, characterized in that: The diameter of the space enclosed by the semicircular sleeve 1 (51) and the semicircular sleeve 2 (52) is not greater than the diameter of the output shaft (2).

6. A pulley installation structure according to claim 2, characterized in that: The extension length of the protrusion (422) on the base plate (421) is greater than the extension length of the clamping block (412) on the plate body (411).

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