Riveting pre-tightening roller

Abstract

The riveting pre-tightening roller comprises an installation shaft, a bearing and a roller assembly, the installation shaft coaxially penetrates through the roller assembly, the bearing is installed between the end portion of the roller assembly and the installation shaft, the installation shaft is provided with a limiting portion, the limiting portion abuts against the inner end face of the bearing, and the end face of the roller assembly is provided with a riveting edge; the riveting pre-tightening roller provided by the utility model does not need to be fixed by a snap spring and is more convenient to install, and the bearing is not easy to damage.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drum technical field especially relates to a riveting pre -tightening drum. BACKGROUND

[0002] The drum needs to be used to support the running belt on the running machine, and the existing drum is shown in the patent with the application number CN201220237121.4, which comprises a drum pipe, a bearing seat, a clasp spring, a bearing and a shaft, the shaft is fixed with the bearing on the outer side through the clasp spring, the installation of the clasp spring consumes more labor, and the bearing is easily damaged when the clasp spring is installed. SUMMARY

[0003] The utility model discloses in order to solve the above -mentioned shortcomings of the existing drum, propose a riveting pre -tightening drum, need not clasp spring fixed, install more convenient, bearing is not easy to damage.

[0004] In order to achieve the above object, the utility model adopts the following technical scheme:

[0005] A riveting pre -tightening drum, including installation shaft, bearing and drum assembly, installation shaft coaxial through drum assembly, bearing is installed between the end of drum assembly and installation shaft, the limit part is set up on installation shaft, and the limit part is opposite with the inner end surface of bearing, and the end surface of drum assembly is provided with riveting edge;

[0006] The riveting edge includes the riveting front state and the riveting rear state;

[0007] In the riveting front state, the distance from the riveting edge to the installation shaft is greater than or equal to the distance from the outer periphery of the bearing to the installation shaft;

[0008] In the riveting rear state, the riveting edge is folded inward, and the outer end surface of the outer ring of the bearing is opposite.

[0009] Through the above setting, first, the bearing is riveted by the riveting edge, and the drum assembly is more convenient, second, the clasp spring is not needed, the first face improves the appearance of the drum, on the other hand, reduces the knocking of the bearing, and the bearing is not easy to damage, and the labor intensity is also reduced.

[0010] Further, the thickness of the riveting edge gradually decreases from one end of the riveting edge close to the drum assembly to the other end.

[0011] Through the above setting, the riveting edge is conveniently bent.

[0012] Further, the end surface of the drum assembly is provided with a machining groove in the circumferential direction, and the machining groove forms the riveting edge close to the installation shaft.

[0013] Through the above setting, the riveting edge is conveniently machined.

[0014] Further, in the riveting pre-state, the riveting side close to the installation shaft is parallel to the outer circumferential surface of the bearing, and the riveting side away from the installation shaft is a conical surface, the included angle between the conical surface and the horizontal plane is a, 30°<a<60°.

[0015] Through the above setting, the riveting side can be stably folded inward after riveting.

[0016] Further, a fillet is arranged on the outer end surface of the bearing, the arc length of the fillet is l, and the height of the riveting side is h, h>l.

[0017] Through the above setting, the riveting side can stably wrap the outer ring of the bearing after riveting, and can extend to the outer end surface of the outer ring of the bearing, thereby improving the support of the outer end surface of the bearing.

[0018] Further, the limiting part comprises a boss arranged on the installation shaft.

[0019] Further, the limiting part further comprises a resilient gasket, the resilient gasket is arranged between the boss and the inner end surface of the bearing, one side of the resilient gasket abuts against the boss, and the other side of the resilient gasket abuts against the inner end surface of the bearing.

[0020] Through the above setting, on the one hand, the impact force of the inner end surface of the bearing can be reduced to protect the bearing, and on the other hand, the gap between the inner end surface of the bearing and the limiting part can be prevented to reduce the noise and stability of the bearing.

[0021] Further, the inner circumferential surface of the bearing is tightly fitted with the installation shaft, and the outer circumferential surface of the bearing is loosely fitted with the roller assembly.

[0022] Through the above setting, the outer ring of the bearing is less stressed during assembly of the roller, thereby further preventing damage to the bearing.

[0023] Further, the roller assembly comprises a roller body and a bearing seat locked at both ends of the roller body, the bearing seat is sleeved on the bearing, and the riveting side is arranged on the outer end surface of the bearing seat. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a partial sectional view of the roller of the embodiment.

[0025] Figure 2 It is an enlarged view of A of Figure 1

[0026] Figure 3 It is a schematic view of the riveting side of the embodiment in the riveting post-state. DETAILED DESCRIPTION

[0027] The technical scheme of the present application will be further specifically described below by means of embodiments in combination with the drawings.

[0028] For example, Figures 1 to 3 ​A riveting pre-tightening roller comprises a mounting shaft 3, a bearing 4 and a roller assembly 5, the mounting shaft 3 penetrates the roller assembly 5 coaxially, the bearing 4 is installed between the end of the roller assembly 5 and the mounting shaft 3, a limiting part 6 is arranged on the mounting shaft 3, the limiting part 6 abuts against the inner end surface of the bearing 4, and the end surface of the roller assembly 5 is provided with a riveting edge 7;

[0029] The riveting edge 7 comprises a pre-riveting state and a post-riveting state;

[0030] In the pre-riveting state, the distance between the riveting edge 7 and the mounting shaft 3 is greater than or equal to the distance between the outer periphery of the bearing 4 and the mounting shaft 3;

[0031] In the post-riveting state, the riveting edge 7 is folded inward, and the riveting edge 7 abuts against the outer end surface of the outer ring of the bearing 4.

[0032] Through the above arrangement, firstly, the bearing 4 is pre-tightened by the riveting edge 7, and the roller assembly is more convenient to assemble, secondly, the snap spring is not needed to assemble, which improves the appearance of the roller on the one hand, and reduces the impact on the bearing 4, so that the bearing 4 is not easy to be damaged, and the labor intensity is also reduced.

[0033] The roller of the present application is not limited to the field of treadmills, but can also be used in the technical field of synchronous belt structures or other structures, and the present application is only explained in the field of treadmills; the roller assembly 5 is coaxially sleeved on the mounting shaft 3, the bearings 4 are installed between the two ends of the roller assembly 5 and the mounting shaft 3 to reduce the rotation resistance of the roller assembly 5, wherein the bearing 4 comprises an inner ring and an outer ring, the bearing 4 can adopt a ball bearing or a roller bearing, or other bearings, which can be adjusted according to the actual situation, and the inner diameter of the bearing 4 is adapted to the outer diameter of the end of the mounting shaft 3; when assembling the roller, the roller assembly 5 is first sleeved on the mounting shaft 3, at this time, the riveting edge 7 is in the pre-riveting state, and the distance between the riveting edge 7 and the mounting shaft 3 is greater than or equal to the distance between the inner periphery and the outer periphery of the bearing 4; when the bearing 4 is installed from the end of the mounting shaft 3, the riveting edge 7 can enter the end of the roller assembly 5, and the riveting edge 7 does not interfere with the bearing 4, as shown in Figure 1 , the side of the bearing 4 close to the middle of the mounting shaft 3 abuts against the limiting part 6, and the limiting part 6 prevents the bearing 4 from moving further to the middle of the mounting shaft 3; then a riveting device is used to rivet the end of the riveting edge 7 away from the roller assembly 5, after the riveting edge 7 is folded inward, the riveting edge 7 wraps the outer end surface of the outer ring of the bearing 4, as shown in Figure 3 , preventing the bearing 4 from coming out of the end of the roller assembly 5, thus realizing the pre-tightening of the bearing 4; the bearing 4 of the roller of the present application is not locked by a snap spring, so less labor is needed, labor is saved, the bearing 4 is not easy to be impacted during assembly, the bearing 4 is protected, the service life of the bearing 4 is improved, and the appearance of the end surface of the roller is improved due to the reduction of the use of the snap spring.

[0034] As an implementation manner, the thickness of the riveting edge 7 gradually decreases from the end of the riveting edge 7 close to the roller assembly 5 to the other end.

[0035] The above settings facilitate bending and riveting of the edge 7.

[0036] As one implementation, the end face of the roller assembly 5 is provided with a machining groove 8 along the circumferential direction, and the machining groove 8 forms the aforementioned riveting edge 7 on the side near the mounting shaft 3.

[0037] The above settings facilitate the processing of the riveting edge 7.

[0038] The cross-section of the machining groove 8 in this application is specifically V-shaped and can be machined by a machine tool or milling machine. The machining groove 8 is arranged circumferentially around the end face of the roller assembly 5. The riveting edge 7 is annular. The machining groove 8 is close to the bearing 4. After the riveting edge 7 is riveted, it can well wrap the outer ring of the bearing 4 and improve the stability of the bearing 4.

[0039] As one implementation method, in the pre-riveting state, the side of the riveting edge 7 closest to the mounting shaft 3 is parallel to the outer peripheral surface of the bearing 4, and the side of the riveting edge 7 furthest from the mounting shaft 3 is a conical surface, with an angle α (30°) between the conical surface and the horizontal plane. <a<60°。

[0040] With the above settings, the riveted edge 7 can be stably folded inward after being riveted.

[0041] As one implementation method, a fillet is provided on the outer end face of the bearing 4, the arc length of the fillet is l, and the height of the riveting edge 7 is h, where h>l.

[0042] With the above settings, the riveting edge 7 can stably wrap around the outer ring of the bearing 4 after being riveted, and can extend to the outer end face of the outer ring of the bearing 4, thereby improving the support for the outer end face of the bearing 4.

[0043] like Figure 2 The height of the riveting edge 7 in this application is specifically as follows: when the mounting shaft 3 is set horizontally and the riveting edge 7 is in the pre-riveting state, the horizontal distance from one side of the riveting edge 7 close to the roller assembly 5 to the other side is h>l. After the riveting edge 7 is riveted, the riveting edge 7 can wrap around the entire rounded corner and can wrap around the end face of the outer ring away from the middle of the mounting shaft 3, thereby improving the limiting effect of the riveting edge 7 on the bearing 4.

[0044] As one implementation, the limiting part 6 includes a boss 61 provided on the mounting shaft 3.

[0045] When the boss 61 abuts against the inner end face of the bearing 4, it can limit the bearing 4 and prevent the bearing 4 from moving towards the middle of the mounting shaft 3.

[0046] As one implementation, the limiting part 6 also includes an elastic gasket 62, which is disposed between the boss 61 and the inner end face of the bearing 4. One side of the elastic gasket 62 abuts against the boss 61, and the other side of the elastic gasket 62 abuts against the inner end face of the bearing 4.

[0047] Through the above setting, on the one hand, the impact force of the inner end face of the bearing 4 can be reduced to protect the bearing 4, and on the other hand, the gap between the inner end face of the bearing 4 and the limiting portion 6 can be prevented to reduce the noise and stability of the bearing 4.

[0048] The elastic gasket 62 of the application can be made of rubber or metal gasket or gasket of other materials, which can be adjusted according to actual needs; when assembling the roller, the elastic gasket 62 is sleeved on the end portion of the mounting shaft 3, one side of the elastic gasket 62 is first abutted against the boss 61, and when the bearing 4 is assembled into the mounting shaft 3, the inner end face of the bearing 4 extrudes the elastic gasket 62, on the one hand, the inner end face of the bearing 4 is buffered to reduce the impact force of the boss 61 on the inner end face of the bearing 4, and on the other hand, the elastic gasket 62 allows a certain compression amount to ensure that there is no gap in the inner end face of the bearing 4 to prevent the bearing 4 from moving left and right in actual work.

[0049] As an implementation manner, the inner periphery of the bearing 4 is tightly fitted with the mounting shaft 3, and the outer periphery of the bearing 4 is loosely fitted with the roller assembly 5.

[0050] Through the above setting, when the roller is assembled, the outer ring of the bearing 4 is less stressed, and the bearing 4 is further prevented from being damaged.

[0051] The bearing 4 of the application can extrude its inner ring when assembled into the mounting shaft 3, so that the bearing 4 is tightly fitted on the mounting shaft 3, and when the bearing 4 enters the end portion of the roller assembly 5, the outer ring of the bearing 4 is less stressed and loosely fitted in the roller assembly 5, specifically, the pressure between the outer ring of the bearing 4 and the roller assembly 5 is less than or equal to 10N.

[0052] As an implementation manner, the roller assembly 5 comprises a roller main body 51 and bearing seats 52 locked at both ends of the roller main body 51, the bearing seats 52 are sleeved on the bearing 4, and the riveting and pressing edge 7 is arranged on the outer end face of the bearing seat 52.

[0053] The roller assembly 5 of the application is composed of the roller main body 51 and the bearing seats 52 at both ends, the roller main body 51 is basically cylindrical and coaxially arranged on the mounting shaft 3, the bearing seats 52 can be clamped, locked or welded at both ends of the roller main body 51, the outer end face of the bearing seat 52 away from the roller main body 51 is machined with a machining groove 8 to form the riveting and pressing edge 7, and the outer ring of the bearing 4 is attached to the inner side of the bearing seat 52 after the roller is assembled.

[0054] It should be understood that those skilled in the art can make improvements or changes according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the utility model.

Claims

1. A riveted preload roller, characterized in that, The device includes a mounting shaft, a bearing, and a roller assembly. The mounting shaft coaxially passes through the roller assembly. The bearing is installed between the end of the roller assembly and the mounting shaft. The mounting shaft is provided with a limiting part that abuts against the inner end face of the bearing. The end face of the roller assembly is provided with a riveted edge. The riveting edge includes a state before riveting and a state after riveting; In the pre-riveting state, the distance from the riveting edge to the mounting shaft is greater than or equal to the distance from the outer periphery of the bearing to the mounting shaft; In the riveted state, the riveted edge is folded inward and abuts against the outer end face of the outer ring of the bearing.

2. A riveting preload roller according to claim 1, characterized in that, The thickness of the riveted edge gradually decreases from one end of the roller assembly to the other.

3. A riveting preload roller according to claim 1, characterized in that, The end face of the roller assembly is provided with a machining groove along the circumferential direction, and the machining groove forms the aforementioned riveting edge on the side near the mounting shaft.

4. A riveting preload roller according to claim 2, characterized in that, In the pre-riveting state, the riveting edge near the mounting shaft is parallel to the outer circumferential surface of the bearing, and the riveting edge away from the mounting shaft is a conical surface with an angle α (30°) between the conical surface and the horizontal plane. <a<60°。 5. A riveted preload roller according to claim 1, characterized in that, The outer end face of the bearing is provided with a fillet, the arc length of the fillet is l, and the height of the riveted edge is h, where h>l.

6. A riveting preload roller according to claim 1, characterized in that, The limiting part includes a boss on the mounting shaft.

7. A riveting preload roller according to claim 6, characterized in that, The limiting part also includes an elastic gasket, which is disposed between the boss and the inner end face of the bearing. One side of the elastic gasket abuts against the boss, and the other side of the elastic gasket abuts against the inner end face of the bearing.

8. A riveting preload roller according to claim 1, characterized in that, The inner circumference of the bearing is tightly fitted with the mounting shaft, and the outer circumference of the bearing is loosely fitted with the roller assembly.

9. A riveting preload roller according to claim 1, characterized in that, The roller assembly includes a roller body and bearing seats locked at both ends of the roller body. The bearing seats are fitted onto the bearings, and the riveted edges are disposed on the outer end face of the bearing seats.

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