Spliced herringbone synchronous belt wheel

Abstract

The utility model discloses a spliced herringbone synchronous pulley, and relates to the technical field of herringbone synchronous pulley structure, the bottom surface of the screw head of bolt is fixed with the protective tube of being sleeved in the outside of bolt, the lower end part of protective tube and bolt all are downwardly through the bottom surface of second pulley, and the outside of protective tube extension end is sleeved with the thimble, and a plurality of blind holes are formed in the top surface of thimble, and the hole bottom of blind hole is provided with spring, the extension end of bolt is threadedly connected with the nut, under the thread connection force of nut and bolt, the thimble is pressed and fixed between the nut and second pulley, and the spring in thimble is pressed on the bottom surface of second pulley, and the screw head of bolt is pressed on the top surface of first pulley, the utility model has the advantages of preventing bolt bending deformation and long service life.

Description

Technical Field

[0001] This utility model relates to the technical field of herringbone synchronous belt pulley structures, and in particular to a spliced ​​herringbone synchronous belt pulley. Background Technology

[0002] The structure of the herringbone synchronous belt pulley produced in a certain workshop is as follows: Figures 1-5 As shown, the herringbone synchronous pulley includes a first pulley 1 and a second pulley 2. The structure of the first pulley 1 is the same as that of the second pulley 2. Multiple transmission teeth 3 are fixed on the outer cylindrical surface of the first pulley 1 along its circumference. Each transmission tooth 3 is inclined. A central hole 4 is opened in the middle of the first pulley 1, penetrating its top and bottom surfaces. Two through holes 5 are also opened in the first pulley 1, located on the left and right sides of the central hole 4 respectively. Both through holes 5 penetrate the top and bottom surfaces of the first pulley 1. The first pulley 1 is supported on the top surface of the second pulley 2, and the center hole 4 of the first pulley 1 is connected to the center hole 4 of the second pulley 2. The two through holes 5 of the first pulley 1 are respectively connected to the two through holes 5 of the second pulley 2. A bolt 6 is inserted between the through hole 5 of the first pulley 1 and the through hole 5 of the second pulley 2. A nut 7 is threaded onto the threaded section of the bolt 6. Under the threaded connection force between the nut 7 and the bolt 6, the first pulley 1 and the second pulley 2 are fixed between the screw head 8 of the bolt 6 and the nut 7.

[0003] The method of using this herringbone synchronous pulley is as follows: take out two herringbone synchronous pulleys, install the two herringbone synchronous pulleys onto two shafts respectively, and then install a belt between the two herringbone synchronous pulleys. Power is input to one shaft through the motor, the shaft drives the belt to move, and the belt drives the herringbone synchronous pulley on the other shaft to rotate.

[0004] The technical advantages of this herringbone synchronous pulley are: when the transmission tooth 3 on the first pulley 1 of the herringbone synchronous pulley is damaged, the worker can first unscrew the nut 7, then remove the bolt 6, then remove the damaged first pulley 1, and finally the worker reconnects the new first pulley with the original second pulley 2 by the bolt 6. At this time, the herringbone synchronous pulley can continue to be used, thereby saving the cost of use.

[0005] However, although this herringbone synchronous pulley is replaceable, the following technical defects still emerge during use: I. When the first pulley 1 of the herringbone synchronous pulley is subjected to an external load, the first pulley 1 has a tendency to move relative to the second pulley 2. The first pulley 1 will shear the bolt 6, thereby causing the bolt 6 to bend and deform, which makes it impossible to remove the bolt 6 and thus impossible to replace the first pulley 1.

[0006] II. After the herringbone synchronous pulley has been running for a long time, the nut 7 is prone to falling off the bolt 6 [the reason for falling off is that the first pulley 1 and the second pulley 2 vibrate for a long time, and after the vibration is transmitted to the nut 7, the nut 7 falls off the bolt 6]. This leads to the automatic separation of the first pulley 1 and the second pulley 2 of the herringbone synchronous pulley. Therefore, this type of herringbone synchronous pulley cannot be used for a long time and has a technical defect of short service life.

[0007] Therefore, there is an urgent need for a spliced ​​herringbone synchronous pulley that can prevent bolt bending and deformation and has a long service life. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a spliced ​​herringbone synchronous pulley that can prevent bolt bending and deformation and has a long service life.

[0009] The purpose of this utility model is achieved through the following technical solution: a spliced ​​herringbone synchronous pulley, which includes a first pulley and a second pulley. Multiple transmission teeth are fixed on the outer cylindrical surface of the first pulley along its circumference. Each transmission tooth is inclined. A central hole penetrating the top and bottom surfaces of the first pulley is opened in the middle of the first pulley. Two through holes are also opened in the first pulley, located on the left and right sides of the central hole respectively. Both through holes penetrate the top and bottom surfaces of the first pulley. A bolt is inserted between the through hole of the first pulley and the through hole of the second pulley. A protective tube is fixed on the bottom surface of the bolt head and sleeved outside the bolt. The lower ends of the protective tube and the bolt both penetrate downward through the bottom surface of the second pulley. The length of the bolt is greater than the length of the protective tube. A collar is sleeved on the outside of the extended end of the protective tube. Multiple blind holes are opened on the top surface of the collar, and springs are installed at the bottom of the blind holes. A nut is threaded onto the extended end of the bolt. Under the threaded connection force between the nut and the bolt, the collar is pressed and fixed between the nut and the second pulley. The spring inside the collar presses against the bottom surface of the second pulley, and the bolt head presses against the top surface of the first pulley.

[0010] The structure of the first pulley is the same as that of the second pulley.

[0011] Each transmission gear is tilted.

[0012] The outer diameter of the protective tube is equal to the diameter of the through hole.

[0013] The two protective tubes are symmetrical about the center hole.

[0014] This utility model has the following advantages: it can prevent bolt bending and deformation and has a long service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the existing herringbone synchronous belt pulley. Figure 2 for Figure 1 A bottom view; Figure 3 for Figure 1 Main section diagram; Figure 4 This is a schematic diagram of the first pulley. Figure 5 for Figure 4 Main section diagram; Figure 6 This is a schematic diagram of the structure of this utility model; Figure 7 for Figure 6 A bottom view; Figure 8 for Figure 6 Main section diagram; Figure 9 This is a schematic diagram showing the connection between the bolt and the protective tube of this utility model; Figure 10 for Figure 9 Main section diagram; Figure 11 This is a schematic diagram showing the connection between the collar and the spring; Figure 12 This is a diagram illustrating how to unscrew a nut from a bolt. Figure 13 This is a diagram illustrating how to remove the collar from the protective tube. Figure 14 This is a diagram illustrating the removal of the bolts and protective tube. In the picture: 1-First pulley, 2-Second pulley, 3-Transmission gear, 4-Center hole, 5-Through hole, 6-Bolt, 7-Nut, 8-Threaded head, 9-Protective tube, 10-Collar, 11-Blind hole, 12-Spring. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description: like Figures 6-11 As shown, a spliced ​​herringbone synchronous pulley includes a first pulley 1 and a second pulley 2. The structure of the first pulley 1 is the same as that of the second pulley 2. Multiple transmission teeth 3 are fixed on the outer cylindrical surface of the first pulley 1 along its circumference. Each transmission tooth 3 is inclined. A central hole 4 is opened in the middle of the first pulley 1, penetrating its top and bottom surfaces. Two through holes 5 are also opened in the first pulley 1, located on the left and right sides of the central hole 4 respectively. Both through holes 5 penetrate the top and bottom surfaces of the first pulley 1.

[0017] A bolt 6 passes through the through hole 5 of the first pulley 1 and the through hole 5 of the second pulley 2. A protective tube 9 is fixed to the bottom surface of the bolt head 8, which is sleeved on the outside of the bolt 6. The lower ends of both the protective tube 9 and the bolt 6 penetrate downward through the bottom surface of the second pulley 2. The length of the bolt 6 is greater than the length of the protective tube 9. A collar 10 is sleeved on the outside of the extended end of the protective tube 9. Multiple blind holes 11 are opened on the top surface of the collar 10, and a spring 12 is installed at the bottom of the blind holes 11. The outer diameter of the protective tube 9 is equal to the diameter of the through hole 5. The two protective tubes 9 are symmetrical about the central hole 4.

[0018] The bolt 6 has a nut 7 threadedly connected to its extension end. Under the threaded connection force between the nut 7 and the bolt 6, the collar 10 is pressed and fixed between the nut 7 and the second pulley 2. The spring 12 inside the collar 10 presses against the bottom surface of the second pulley 2, and the screw head 8 of the bolt 6 presses against the top surface of the first pulley 1.

[0019] The method of using this herringbone synchronous pulley is as follows: take out two herringbone synchronous pulleys, install the two herringbone synchronous pulleys onto two shafts respectively, and then install a belt between the two herringbone synchronous pulleys. Power is input to one shaft through the motor, the shaft drives the belt to move, and the belt drives the herringbone synchronous pulley on the other shaft to rotate.

[0020] When the first pulley 1 is damaged and needs to be replaced, the worker's operating procedures are as follows: S1. The worker unscrews nut 7 from bolt 6, as follows: Figure 12 As shown; S2. The worker removes the collar 10 from the protective tube 9, as follows: Figure 13 As shown, the worker then pulled out bolt 6 and protective tube 9, as follows. Figure 14 As shown; S3. The worker removes the damaged first pulley 1, and then the worker reconnects the new first pulley with the original second pulley 2 via bolt 6, bolt 6 and collar 10. At this time, the herringbone synchronous pulley can continue to be used, thus saving the cost of use.

[0021] Because the collar 10 is pressed and fixed between the nut 7 and the second pulley 2, and the spring 12 inside the collar 10 presses against the bottom surface of the second pulley 2, the external thread of the bolt 6 and the internal thread of the nut 7 are tightly engaged under the elastic restoring force of the spring 12. This effectively prevents the nut 7 from easily falling off the bolt 6 after a period of long-term operation of the spliced ​​herringbone synchronous pulley, thus preventing the first pulley 1 and the second pulley 2 of the herringbone synchronous pulley from automatically separating. This ensures that the spliced ​​herringbone synchronous pulley can be used for a long time. Therefore, compared with other types of herringbone synchronous pulleys, this spliced ​​herringbone synchronous pulley is superior. Figures 1-5The herringbone synchronous pulley shown has the advantage of a longer service life.

[0022] Furthermore, the compressed spring 12 constantly applies an upward elastic force to the second pulley 2, thus firmly fixing the second pulley 2 to the first pulley 1. This effectively prevents the nut 7 from easily falling off the bolt 6 after a period of long-term operation, thereby preventing the first pulley 1 and the second pulley 2 of the herringbone synchronous pulley from automatically separating. This ensures that the herringbone synchronous pulley can be used for a long time. Therefore, compared with other types of herringbone synchronous pulleys, this herringbone synchronous pulley is superior. Figures 1-5 The herringbone synchronous pulley shown has the advantage of a longer service life.

[0023] Furthermore, because the bolt 6 is encased in a protective sleeve 9, when the first pulley 1 is subjected to external loads, the shear force is entirely applied to the protective sleeve 9 and not to the bolt 6, thus effectively preventing the bolt 6 from bending and deforming. Therefore, this spliced ​​herringbone synchronous pulley is superior to... Figures 1-5 The herringbone synchronous pulley shown can be easily removed from the first pulley 1 and the second pulley 2 during replacement, thereby enabling the replacement of the first pulley 1.

Claims

1. A spliced ​​herringbone synchronous pulley, comprising a first pulley (1) and a second pulley (2), wherein a plurality of transmission teeth (3) are fixedly provided on the outer cylindrical surface of the first pulley (1) along its circumference, each transmission tooth (3) being inclined, a central hole (4) penetrating the top and bottom surfaces of the first pulley (1) is provided in the middle, and two through holes (5) located on the left and right sides of the central hole (4) are also provided in the first pulley (1), both through holes (5) penetrating the top and bottom surfaces of the first pulley (1), characterized in that: A bolt (6) is inserted between the through hole (5) of the first pulley (1) and the through hole (5) of the second pulley (2). A protective tube (9) is fixed on the bottom surface of the bolt head (8) of the bolt (6) and sleeved on the outside of the bolt (6). The lower ends of the protective tube (9) and the bolt (6) both penetrate downward through the bottom surface of the second pulley (2). The length of the bolt (6) is greater than the length of the protective tube (9). A collar (10) is sleeved on the outside of the extended end of the protective tube (9). Multiple blind holes (11) are opened on the top surface of the collar (10). A spring (12) is provided at the bottom of the blind hole (11). A nut (7) is threaded onto the extended end of the bolt (6). Under the threaded connection force between the nut (7) and the bolt (6), the collar (10) is pressed and fixed between the nut (7) and the second pulley (2). The spring (12) inside the collar (10) presses against the bottom surface of the second pulley (2), and the screw head (8) of the bolt (6) presses against the top surface of the first pulley (1).

2. The spliced ​​herringbone synchronous pulley according to claim 1, characterized in that: The structure of the first pulley (1) is the same as that of the second pulley (2).

3. The spliced ​​herringbone synchronous pulley according to claim 1, characterized in that: Each transmission gear (3) is inclined.

4. The spliced ​​herringbone synchronous pulley according to claim 1, characterized in that: The outer diameter of the protective tube (9) is equal to the diameter of the through hole (5).

5. The spliced ​​herringbone synchronous pulley according to claim 1, characterized in that: The two protective tubes (9) are symmetrical about the center hole (4).

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