Riveting device for increasing riveting pulling-out force of belt wheel

Abstract

The utility model relates to the field of belt wheel machining equipment, in particular to a riveting device for increasing belt wheel riveting pulling-out force, which comprises an upper die, a lower die and a stamping column head, a machining cavity for placing a belt wheel is formed in the surface, facing the upper die, of the lower die, one end of the stamping column head is connected to the surface of the upper die, and the other end of the stamping column head can stamp the surface of the upper belt wheel. And the upper belt wheel is driven to extrude and deform in the direction close to the lower belt wheel. Through the arrangement of the lower die, the upper die and the stamping column head, the protruding part of the upper belt wheel reversely wraps the lower belt wheel, riveting and fixing between the upper belt wheel and the lower belt wheel are achieved, the pulling-out force is additionally added on the basis of the originally increased pulling-out force, the friction force between the belt wheels and a belt is sufficient to resist large loads or tension during high-speed operation, and therefore the safety of the belt is improved. The belt is not prone to slipping, the transmission efficiency is improved, it is guaranteed that the belt and the belt wheel are not prone to abrasion, and therefore the service life of the tensioning wheel is prolonged.

Description

TECHNICAL FIELD

[0001] The application relates to the field of pulley processing equipment, in particular to a riveting device for increasing the riveting pull-off force of a pulley. BACKGROUND

[0002] The tensioner is a belt tensioning device for an automobile transmission system, and mainly comprises a fixed shell, a tensioning arm, a pulley body, a torsional spring, a rolling bearing and a spring shaft sleeve, and can automatically adjust the tensioning force according to the different tightness of the belt, so that the transmission system is stable, safe and reliable.

[0003] The pulley of the prior art comprises an upper pulley, a lower pulley and a bearing, the upper pulley and the lower pulley cover the outer periphery of the bearing, and the upper pulley and the lower pulley are connected through riveting; however, the riveting part in the pulley is a double-arc, and the increase in the pull-off force is limited, so that the friction force between the pulley and the belt is insufficient to resist the tension of large load or high-speed operation, the belt is prone to slip, the transmission efficiency is reduced, excessive wear between the belt and the pulley is caused, and the service life of the tensioner is reduced. CONTENT OF THE UTILITY MODEL

[0004] In order to improve the problem of the pull-off force of the pulley, the application provides a riveting device for increasing the riveting pull-off force of a pulley.

[0005] The application provides a riveting device for increasing the riveting pull-off force of a pulley, which adopts the following technical scheme:

[0006] The riveting device for increasing the riveting pull-off force of a pulley comprises an upper die, a lower die and a stamping stud, the surface of the lower die facing the upper die is provided with a machining cavity for placing the pulley, one end of the stamping stud is connected to the surface of the upper die, and the other end of the stamping stud can stamp the surface of the upper pulley and drive the upper pulley to extrude and deform in the direction of approaching the lower pulley.

[0007] By adopting the above technical scheme, the pulley is placed in the machining cavity, and the outer periphery of the outer wheel abuts against the inner wall of the machining cavity to form a limit, so that the pulley is not easy to deviate on the lower die, and thus the positioning of the pulley on the lower die is realized; meanwhile, the upper pulley faces the upper die, the press drives the upper die to approach the lower die, the end of the stamping stud abuts against the surface of the upper pulley, and the upper pulley is driven to extrude and deform in the direction of approaching the lower pulley, the protruding part of the upper pulley wraps the lower pulley, the riveting and fixing between the upper pulley and the lower pulley are realized, additional pull-off force is added on the basis of the original increase in the pull-off force, the friction force between the pulley and the belt is sufficient to resist the tension of large load or high-speed operation, the belt is not easy to slip, the transmission efficiency is improved, the belt and the pulley are not easy to wear, and thus the service life of the tensioner is prolonged.

[0008] Optionally, the surface of the lower die facing the upper die is provided with a deformation cavity for deforming the surface of the lower pulley.

[0009] By adopting the technical scheme, when the stamping stud extrudes the surface of the upper belt wheel, drives the upper belt wheel to extrude the surface of the lower belt wheel and deforms, the deformation cavity provides space for the deformation of the lower belt wheel under pressure, reduces the wear between the lower belt wheel and the lower die, thereby guaranteeing the machining quality of the belt wheel.

[0010] Optionally, the upper die comprises a pressing plate, a guide ring and a die plate, the pressing plate is connected to the surface of the die plate facing the lower die, the surface of the pressing plate facing the lower die is provided with a sliding cavity for the sliding of the guide ring, the end of the stamping stud is connected to the surface of the die plate, the surface of the guide ring is provided with a sliding rail for the sliding of the stamping stud, when the upper die approaches the lower die, the end surface of the guide ring abuts against the surface of the upper belt wheel, drives the guide ring to slide along the inner wall of the sliding cavity towards the die plate, the end of the stamping stud slides along the inner wall of the sliding rail towards the upper belt wheel and extrudes the surface of the upper belt wheel, and the surface of the pressing plate abuts against the surface of the upper belt wheel to form positioning.

[0011] By adopting the technical scheme, when the belt wheel is placed in the machining cavity, the surface of the belt wheel abuts against the inner wall of the machining cavity to form limiting, the pressing machine abuts against the surface of the die plate and drives the pressing plate to approach the upper belt wheel, the end surface of the guide ring abuts against the surface of the upper belt wheel to form limiting, the pressing machine continues to extrude the pressing plate, drives the guide ring to slide along the inner wall of the sliding cavity towards the die plate, drives the end of the stamping stud to slide along the inner wall of the sliding rail towards the upper belt wheel, the end of the stamping stud protruding from the end surface of the guide ring extrudes the surface of the upper belt wheel to deform, drives the surface of the upper belt wheel to extrude the surface of the lower belt wheel to deform and fix, realizes the riveting and fixing between the upper belt wheel and the lower belt wheel, and at the same time, the surface of the pressing plate abuts against the surface of the upper belt wheel to form positioning, so that the staff can directly infer the riveting condition between the lower belt wheel and the upper belt wheel, thereby improving the production efficiency of the belt wheel.

[0012] Optionally, the upper die further comprises an elastic member, one end of the elastic member in the elastic force direction is connected to the surface of the guide ring, the other end of the elastic member in the elastic force direction is connected to the surface of the die plate, and the elastic member has a tendency to drive the guide ring to slide away from the die plate in the elastic force direction.

[0013] By adopting the technical scheme, when the stamping stud extrudes the surface of the upper belt wheel to deform, the pressing machine is reset, the pressure on the pressing plate disappears, the elastic member drives the guide ring to slide along the inner wall of the sliding cavity away from the die plate in the elastic force direction, drives the stamping stud to slide along the inner wall of the sliding rail away from the upper belt wheel, and the end of the stamping stud is separated from the surface of the upper belt wheel, thereby realizing the material removal of the stamping stud without manual pushing of the guide ring by the staff, thereby improving the machining efficiency of the belt wheel.

[0014] Optionally, the surface of the guide ring facing the die plate is provided with a limiting cavity for the end of the elastic member to embed.

[0015] By adopting the technical scheme, the end of the elastic member is embedded in the limiting cavity, the end of the elastic member abuts against the inner wall of the limiting cavity to form limiting, the elastic member is not easy to be separated from the limiting cavity, and therefore the connection stability between the elastic member and the guide ring is improved.

[0016] Optionally, the surface of the guide ring is provided with a avoiding cavity for embedding the upper pulley.

[0017] By adopting the technical scheme, when the press drives the template to be close to the lower die, the end face of the guide ring abuts against the surface of the upper pulley, the end of the upper pulley is embedded in the avoiding cavity, and the outer peripheral surface of the upper pulley abuts against the inner wall of the avoiding cavity to form positioning, so that the upper pulley is not easy to deviate in the avoiding cavity, the abrasion between the upper pulley and the guide ring is reduced, and therefore the production quality of the pulley is improved.

[0018] Optionally, the bottom wall of the processing cavity is provided with a limiting groove for embedding the end of the bearing.

[0019] By adopting the technical scheme, when the pulley is placed in the processing cavity, the outer peripheral surface of the pulley abuts against the inner wall of the processing cavity to form limiting, and the end of the bearing is embedded in the limiting groove, and the outer peripheral surface of the bearing abuts against the inner wall of the limiting groove to form limiting, so that the pulley is not easy to deviate in the processing cavity during the processing, and therefore the processing quality of the pulley is improved.

[0020] Optionally, the stamping stud is fixed on the plate surface of the template by a bolt.

[0021] By adopting the technical scheme, when the stamping stud needs to be replaced due to abrasion, the bolt is unscrewed to realize the disassembly of the stamping stud and the template, so that the replacement of the stamping stud is facilitated, the entire upper die does not need to be replaced, the material consumption is reduced, and the concept of energy saving is embodied.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] 1. The lower die, the upper die and the stamping stud are arranged, the protruding part of the upper pulley wraps the lower pulley, the riveting and pressing fixation between the upper pulley and the lower pulley is realized, additional pulling force is added on the basis of the original pulling force, the friction force between the pulley and the belt is sufficient to resist the tension when a large load or high speed is operated, the belt is not easy to slip, the transmission efficiency is improved, the abrasion between the belt and the pulley is prevented, and therefore the service life of the tension pulley is prolonged;

[0024] 2. The deformation cavity is arranged, the deformation cavity provides space for the pressure deformation of the lower pulley, the abrasion between the lower pulley and the lower die is reduced, and therefore the processing quality of the pulley is ensured;

[0025] 3. The setting of the pressing plate, the guide ring and the template realizes riveting and fixing between the upper belt wheel and the lower belt wheel, and the pressing plate surface abuts against the surface of the upper belt wheel to form positioning, so that the worker can directly infer the riveting condition between the lower belt wheel and the upper belt wheel, thereby improving the production efficiency of the belt wheel. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure in the embodiment of the present application.

[0027] Figure 2 is a sectional view in the embodiment of the present application, mainly showing the riveting and pressing state of the lower belt wheel and the upper belt wheel.

[0028] Figure 3 is a sectional view in the embodiment of the present application, mainly showing the state of the belt wheel placed on the lower die.

[0029] Mark explanation: 1, upper die; 11, template; 12, pressing plate; 121, sliding cavity; 13, guide ring; 131, avoiding cavity; 132, slide rail; 133, limiting cavity; 14, elastic piece; 2, lower die; 21, fixed plate; 211, threaded hole; 22, positioning ring; 221, processing cavity; 222, limiting groove; 223, deformation cavity; 3, stamping stud; 4, upper belt wheel; 5, bearing; 6, lower belt wheel. DETAILED DESCRIPTION

[0030] The following will be described in detail in combination with the accompanying drawings. Figures 1-3 The present application will be further described in detail.

[0031] The embodiment of the present application discloses a riveting and pressing device for increasing the riveting and pulling force of a belt wheel. Referring to Figure 1 and Figure 2The application discloses a riveting device for increasing the pull-off force of a pulley, which comprises an upper die 1, a lower die 2 and a stamping stud 3, wherein the lower die 2 comprises a fixed plate 21 and a positioning ring 22; in the embodiment, the fixed plate 21 is a circular plate, and the positioning ring 22 is integrally formed coaxially on the surface of the fixed plate 21; a plurality of threaded holes 211 are formed on the surface of the fixed plate 21 in a spaced-apart manner in the circumferential direction, and a plurality of bolts are correspondingly screwed and fixed on the surface of the base, so that the lower die 2 is fixed on the surface of the base; a machining cavity 221 for placing the pulley is coaxially formed in the positioning ring 22, and a limiting groove 222 for embedding the end of a bearing 5 is coaxially formed in the bottom wall of the machining cavity 221; the limiting groove 222 penetrates through the outer wall of the fixed plate 21 along the axis of the positioning ring 22; the end of the stamping stud 3 is fixed on the surface of the upper die 1 through a bolt; when the pulley is placed in the machining cavity 221, the outer circumferential surface of the pulley abuts against the inner wall of the machining cavity 221 to form a limit, and the upper pulley 4 faces the upper die 1; the press drives the upper die 1 to move close to the lower die 2, drives the stamping stud 3 to stamp the surface of the upper pulley 4, and drives the surface of the upper pulley 4 to deform towards the surface of the lower pulley 6; the protruding part of the upper pulley 4 wraps the lower pulley 6, so that the upper pulley 4 and the lower pulley 6 are fixed through riveting; on the basis of the original increase in the pull-off force, an additional pull-off force of 500-1500 N is added, so that the friction force between the pulley and the belt is sufficient to resist the tension in the case of large load or high-speed operation, the belt is not easy to slip, the transmission efficiency is improved, the wear between the belt and the pulley is prevented, and thus the service life of the tension pulley is prolonged.

[0032] With reference to Figure 2 and Figure 3 , the surface of the positioning ring 22 facing the upper die 1 is provided with a deformation cavity 223 for the surface deformation of the lower pulley 6; the deformation cavity 223 provides a space for the surface deformation of the lower pulley 6, reduces the wear between the lower pulley 6 and the positioning ring 22, improves the processing quality of the pulley, and prolongs the service life of the riveting device for increasing the pull-off force of the pulley.

[0033] With reference to Figure 2 and Figure 3 , the upper die 1 comprises a die plate 11, a pressing plate 12, a guide ring 13 and an elastic member 14; the pressing plate 12 is fixed on the surface of the die plate 11 through a bolt; the surface of the pressing plate 12 is provided with a sliding cavity 121 for sliding of the guide ring 13; the sliding direction of the guide ring 13 and the sliding direction of the upper die 1 are parallel to each other; the guide ring 13 is coaxially provided with an avoiding cavity 131 for embedding the end of the upper pulley 4; the avoiding cavity 131 penetrates through the outer wall of the guide ring 13 along the axis of the guide ring 13; the inner wall of the avoiding cavity 131 abuts against the outer circumferential surface of the upper pulley 4, so that the wear between the upper pulley 4 and the guide ring 13 is reduced, and thus the production quality of the pulley is improved.

[0034] With reference to Figure 2 and Figure 3, the end of the stamping stud 3 is fixed on the plate surface of the die plate 11 by bolts, the height direction of the stamping stud 3 and the sliding direction of the upper die 1 are parallel to each other, the guide ring 13 is provided with a sliding rail 132 for the stamping stud 3 to slide towards the plate surface of the die plate 11, the sliding rail 132 penetrates through the outer wall of the guide ring 13 along the axis of the guide ring 13; the elastic member 14 can be a compression spring or a tension spring, in the embodiment of the application, the elastic member 14 is a compression spring and has a certain deformation capacity, the guide ring 13 is provided with a limiting cavity 133 for the end of the elastic member 14 to embed towards the plate surface of the die plate 11, one end of the elastic member 14 in the elastic force direction is connected to the bottom wall of the limiting cavity 133, the other end of the elastic member 14 in the elastic force direction is connected to the plate surface of the die plate 11, the elastic force direction of the elastic member 14 and the sliding direction of the upper die 1 are parallel to each other, the elastic member 14 has an elastic force to drive the guide ring 13 to slide away from the die plate 11 and make the end of the stamping stud 3 tend to be located in the sliding rail 132, the guide ring 13 shields the stamping end of the stamping stud 3, so that the stamping stud 3 is not easy to be damaged by impact during storage, thereby prolonging the service life of the riveting device for increasing the riveting pull-out force of the pulley.

[0035] With reference to Figure 2 and Figure 3 When the press drives the die plate 11 to approach the pulley, the end of the upper pulley 4 is embedded in the avoiding cavity 131, the outer peripheral surface of the upper pulley 4 abuts against the inner wall of the avoiding cavity 131 to form a guide, so that the upper die 1 is not easy to deviate when approaching the lower die 2, at the same time, the end surface of the guide ring 13 abuts against the surface of the upper pulley 4, the press continues to press the plate surface of the die plate 11, drives the guide ring 13 to slide along the inner wall of the sliding cavity 121 towards the die plate 11 against the elastic force of the elastic member 14, drives the stamping stud 3 to slide along the inner wall of the sliding rail 132 towards the plate of the upper die 1, the end of the stamping stud 3 protruding from the guide ring 13 presses the surface of the upper pulley 4, drives the surface of the upper pulley 4 to deform towards the surface of the lower pulley 6, the protruding part of the upper pulley 4 wraps the lower pulley 6, and realizes the riveting and fixing between the upper pulley 4 and the lower pulley 6.

[0036] The implementation principle of the riveting device for increasing the pull-off force of the pulley is as follows: the pulley is placed in the machining cavity 221, and the outer circumferential surface of the pulley abuts against the inner wall of the machining cavity 221 to form a limit, and the upper pulley 4 faces the upper die 1; the press drives the die plate 11 to approach the pulley, and the end portion of the upper pulley 4 is embedded in the avoiding cavity 131, and the outer circumferential surface of the upper pulley 4 abuts against the inner wall of the avoiding cavity 131 to form a guide, so that the upper die 1 is not easy to deviate when approaching the lower die 2; at the same time, the end surface of the guide ring 13 abuts against the surface of the upper pulley 4, the press continues to extrude the surface of the die plate 11, drives the guide ring 13 to slide along the inner wall of the sliding cavity 121 towards the direction of approaching the die plate 11 to overcome the elastic force of the elastic element 14, drives the stamping stud 3 to slide along the inner wall of the sliding rail 132 towards the direction of approaching the surface of the upper die 1, the end portion of the stamping stud 3 extruding the surface of the guide ring 13 extrudes the surface of the upper pulley 4, drives the surface of the upper pulley 4 to deform towards the direction of approaching the surface of the lower pulley 6, and the protruding portion of the upper pulley 4 wraps the lower pulley 6, so as to realize the riveting and fixing between the upper pulley 4 and the lower pulley 6. On the basis of the original increased pull-off force, the pull-off force is additionally added, so that the friction force between the pulley and the belt is sufficient to resist the tension when the large load or high speed runs, the belt is not easy to slip, the transmission efficiency is improved, the wear between the belt and the pulley is not easy to occur, and thus the service life of the tension pulley is prolonged.

[0037] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made on the basis of the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A riveting device for increasing the pull-out force of a pulley riveting assembly, characterized in that: It includes an upper die (1), a lower die (2) and a stamping head (3). The lower die (2) has a processing cavity (221) for placing the pulley on its surface facing the upper die (1). One end of the stamping head (3) is connected to the surface of the upper die (1), and the other end of the stamping head (3) can stamp the surface of the upper pulley (4) to drive the upper pulley (4) to be squeezed and deformed in a direction closer to the lower pulley (6).

2. The riveting device for increasing the pull-out force of the pulley riveting according to claim 1, characterized in that: The lower mold (2) has a deformation cavity (223) on its surface facing the upper mold (1) for the deformation of the surface of the lower pulley (6).

3. The riveting device for increasing the pull-out force of the pulley riveting according to claim 1, characterized in that: The upper mold (1) includes a pressure plate (12), a guide ring (13), and a template (11). The pressure plate (12) is connected to the surface of the template (11) facing the lower mold (2). The surface of the pressure plate (12) facing the lower mold (2) has a sliding cavity (121) for the guide ring (13) to slide. The end of the stamping head (3) is connected to the surface of the template (11). The surface of the guide ring (13) has a slide rail (1) for the stamping head (3) to slide. 32) When the upper mold (1) approaches the lower mold (2), the end face of the guide ring (13) abuts against the surface of the upper pulley (4), driving the guide ring (13) to slide along the inner wall of the sliding cavity (121) toward the template (11), the end of the stamping column head (3) slides along the inner wall of the slide rail (132) toward the upper pulley (4) and stamps the surface of the upper pulley (4), and the plate surface of the pressure plate (12) abuts against the surface of the upper pulley (4) to form a positioning.

4. A riveting device for increasing the pull-out force of a pulley riveting according to claim 3, characterized in that: The upper mold (1) also includes an elastic element (14), one end of which is connected to the surface of the guide ring (13) in the elastic direction, and the other end of which is connected to the surface of the template (11). The elastic element (14) has the tendency to force the guide ring (13) to slide away from the template (11).

5. A riveting device for increasing the pull-out force of a pulley riveting according to claim 4, characterized in that: The guide ring (13) has a limiting cavity (133) on its surface facing the template (11) for the end of the elastic element (14) to be inserted.

6. A riveting device for increasing the pull-out force of a pulley riveting according to claim 3, characterized in that: The guide ring (13) has a clearance cavity (131) on its surface for the upper pulley (4) to be inserted.

7. A riveting device for increasing the pull-out force of a pulley riveting according to claim 1, characterized in that: The bottom wall of the processing cavity (221) is provided with a limiting groove (222) for the end of the bearing (5) to be embedded.

8. A riveting device for increasing the pull-out force of a pulley riveting according to claim 3, characterized in that: The stamped column head (3) is fixed to the template (11) by bolts.

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