CN214776379U - Toothless middle shaft bowl group - Google Patents

Abstract

The utility model discloses a toothless middle shaft bowl group, which comprises a middle shaft, wherein a left snap spring, a left support bearing, a toothless left wrist, a toothless right wrist, a right support bearing and a right snap spring are sequentially sleeved on the middle shaft from left to right, and a left step positioned on the left side of the middle shaft and a right step positioned on the right side of the middle shaft are arranged on the middle shaft; the left side of the toothless left wrist is provided with a left annular step and a left clamp spring groove, and the right side of the toothless left wrist is matched with the left step; the right side of the toothless right wrist is provided with a right annular step and a right clamp spring groove, and the left side of the toothless right wrist is matched with the right step; the left annular step is sleeved with the left support bearing, and the right annular step is sleeved with the right support bearing; the left clamp spring groove is sleeved with the left clamp spring, and the right clamp spring groove is sleeved with the right clamp spring. The utility model discloses not only the axis operation is smooth and easy, still has bearing long service life, dustproof effectual, the location is convenient and change convenient advantage.

Description

Toothless middle shaft bowl group

Technical Field

The utility model relates to a middle shaft wrist group, in particular to a toothless middle shaft bowl group.

Background

The middle shaft wrist group of the bicycle comprises a middle shaft, a left wrist, a right wrist, a left support bearing and a right support bearing, wherein the left support bearing is sleeved in the left wrist, and the right support bearing is sleeved in the right wrist; the left wrist and the right wrist are respectively connected with two sides of the five-way pipe through threads, and the middle shaft is sleeved on the left supporting bearing and the right supporting bearing; threads are respectively machined on two sides of the five-way pipe, and the concentricity between the two threads is poor; the concentricity of the left wrist and the right wrist is poor, and the concentricity of the left support bearing and the right support bearing is poor, so that the middle shaft runs unsmoothly; the middle shaft runs unsmoothly, so that the left and right support shafts bear uneven force, and the service life of the left and right support bearings is short easily. Therefore, the problems that the middle shaft of the existing bicycle middle shaft assembly runs unsmoothly and the service life of the bearing is short exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a no tooth formula axis bowl group. The utility model discloses not only the axis operation is smooth and easy, still has bearing long service life's advantage.

The technical scheme of the utility model: the toothless middle shaft bowl group comprises a middle shaft, wherein a left snap spring, a left support bearing, a toothless left wrist, a toothless right wrist, a right support bearing and a right snap spring are sequentially sleeved on the middle shaft from left to right; the middle shaft is provided with a left step positioned on the left side of the middle shaft and a right step positioned on the right side of the middle shaft; the left side of the toothless left wrist is provided with a left annular step and a left clamp spring groove, and the right side of the toothless left wrist is matched with the left step; the right side of the toothless right wrist is provided with a right annular step and a right clamp spring groove, and the left side of the toothless right wrist is matched with the right step; the left annular step is sleeved with the left support bearing, and the right annular step is sleeved with the right support bearing; the left clamp spring groove is sleeved with the left clamp spring, and the right clamp spring groove is sleeved with the right clamp spring.

In the toothless middle shaft bowl group, a left wave-shaped gasket is arranged between the left clamp spring and the left support bearing, and a right wave-shaped gasket is arranged between the right clamp spring and the right support bearing.

In the toothless middle shaft bowl group, the left side of the toothless left wrist is connected with a left dust cover sleeved with the middle shaft, and the right side of the toothless right wrist is connected with a right dust cover sleeved with the middle shaft.

In the toothless middle shaft bowl group, the toothless left wrist is provided with the left limiting part, and the toothless right wrist is provided with the right limiting part.

In the toothless middle shaft bowl group, the left end of the toothless left wrist is provided with uniformly distributed left threaded holes, and the right end of the toothless right wrist is provided with uniformly distributed right threaded holes.

Compared with the prior art, the utility model improves the prior middle shaft wrist group, the left wrist is provided with the toothless left wrist and the toothless right wrist, and the toothless left wrist and the toothless right wrist are respectively provided with the left support bearing and the right support bearing; the left toothless wrist and the right toothless wrist are respectively pressed into the left side and the right side of the five-way pipe, and two ends of the middle shaft are respectively sleeved on the left supporting bearing and the right supporting bearing, so that the middle shaft assembly is installed in the five-way pipe; the five-way pipe only needs to be processed into the through hole at one time, so that threads on two sides are prevented from being processed, and the concentricity of two sides of the five-way pipe is improved; the outer sides of the left toothless wrist and the right toothless wrist are processed into cylinders, the concentricity of the left toothless wrist, the right toothless wrist and the five-way pipe after matching is improved, the concentricity of the left supporting bearing and the right supporting bearing is further improved, the left supporting bearing and the right supporting bearing are limited by matching the snap springs, the left supporting bearing and the right supporting bearing are prevented from moving, the concentricity is poor, the middle shaft runs smoothly, the left bearing and the right bearing are prevented from being stressed unevenly, and the service life of the bearing is prolonged. In addition, the utility model also arranges the left wave-shaped gasket between the left clamp spring and the left support bearing and the right wave-shaped gasket between the right clamp spring and the right support bearing, the left wave-shaped gasket and the right wave-shaped gasket can prevent the left support bearing and the right support bearing from loosening, ensure the concentricity of the left support bearing and the right support bearing, further ensure the smooth operation of the middle shaft, also can slow down the impact on the left support bearing and the right support bearing, and further improve the service life of the bearing; by arranging the left dustproof cover and the right dustproof cover, dust can be prevented from entering the left supporting bearing and the right supporting bearing, and the dustproof effect is good; the left limiting part is arranged on the toothless left wrist, and the right limiting part is arranged on the toothless right wrist, so that the positioning is convenient; set up evenly distributed's left screw hole through tooth-free left wrist left end, tooth-free right side wrist right-hand member sets up evenly distributed's right screw hole, can cooperate the instrument to break away from five-way pipe with tooth-free left wrist and tooth-free right wrist, the convenient change. Therefore, the utility model discloses not only the axis operation is smooth and easy, still has bearing long service life, dustproof effectual, the location is convenient and change convenient advantage.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of a toothless left wrist;

fig. 3 is a schematic structural view of the toothless right wrist.

The labels in the figures are: 1-middle shaft, 2-left clamp spring, 3-left support bearing, 4-toothless left wrist, 41-left annular step, 42-left clamp spring groove, 43-left limiting part, 44-left threaded hole, 5-toothless right wrist, 51-right annular step, 52-right clamp spring groove, 53-right limiting part, 54-right threaded hole, 6-right support bearing, 7-right clamp spring, 8-left wave-shaped gasket, 9-right wave-shaped gasket, 10-left dust cover, 11-left step, 12-right step and 13-right dust cover.

Detailed Description

The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.

Examples are given. The toothless middle shaft bowl group is shown in figures 1 to 3 and comprises a middle shaft 1, wherein a left clamp spring 2, a left support bearing 3, a toothless left wrist 4, a toothless right wrist 5, a right support bearing 6 and a right clamp spring 7 are sequentially sleeved on the middle shaft 1 from left to right; the middle shaft 1 is provided with a left step 11 positioned at the left side of the middle shaft 1 and a right step 12 positioned at the right side of the middle shaft 1; the left side of the toothless left wrist 4 is provided with a left annular step 41 and a left clamp spring groove 42, and the right side of the toothless left wrist is matched with the left step 11; the right side of the toothless right wrist 5 is provided with a right annular step 51 and a right clamp spring groove 52, and the left side of the toothless right wrist is matched with the right step 12; the left annular step 41 is sleeved with the left support bearing 3, and the right annular step 51 is sleeved with the right support bearing 6; the left clamp spring groove 42 is sleeved with the left clamp spring 2, and the right clamp spring groove 52 is sleeved with the right clamp spring 7.

A left wave-shaped gasket 8 is arranged between the left clamp spring 2 and the left support bearing 3, and a right wave-shaped gasket 9 is arranged between the right clamp spring 7 and the right support bearing 6; the left side of the toothless left wrist 4 is connected with a left dustproof cover 10 which is sleeved with the middle shaft 1, and the right side of the toothless right wrist 5 is connected with a right dustproof cover 13 which is sleeved with the middle shaft 1; the left toothless wrist 4 is provided with a left limiting part 43, and the right toothless wrist 5 is provided with a right limiting part 53; the left end of the toothless left wrist 4 is provided with evenly distributed left threaded holes 44, and the right end of the toothless right wrist 5 is provided with evenly distributed right threaded holes 54.

The working principle is as follows: when in use, the left support bearing 3 is pressed into the bottom end of the left annular step 41 of the toothless left wrist 4, and the right support bearing 6 is pressed into the bottom end of the left annular step 41 of the toothless right wrist 5; pressing the toothless left wrist 4 into the left side of the five-way pipe until the left limiting part 43 is contacted with the five-way pipe, so that the positioning is convenient; turning the five-way pipe, sleeving the middle shaft 1 with the toothless left wrist 4, and touching the left step 11 with the toothless left wrist 4; the toothless right wrist 5 is pressed into the right side of the five-way pipe until the right limiting part 53 is contacted with the five-way pipe, so that the positioning is convenient; after the left toothless wrist 4 and the right toothless wrist 5 are pressed into the five-way pipe, the left toothless wrist 4 is in clearance fit with the left step 11, and the right toothless wrist 5 is in clearance fit with the right step 12; the right wave-shaped gasket 9 is put into the right annular step 51 and is in contact with the right support bearing 6; the right clamp spring 7 is clamped into the right clamp spring groove 52 to limit the right support bearing 6, so that the concentricity difference caused by the movement of the right support bearing 6 is avoided; the right clamp spring 7 is clamped into the right clamp spring groove 52 to enable the right corrugated gasket 9 to be extruded and deformed, so that the right support bearing 6 can be prevented from loosening, the concentricity is ensured, the smooth running of the middle shaft is further ensured, the impact on the right support bearing 6 can be relieved, and the service life of the bearing is further prolonged; the right dustproof cover 13 is connected to the toothless right wrist 5, so that dust can be prevented from entering the right support bearing 6, and the dustproof effect is good; turning over the five-way pipe, putting the left wave-shaped gasket 8 into the left annular step 41 and contacting with the left support bearing 3; the left clamp spring 2 is clamped into the left clamp spring groove 42 to limit the left support bearing 3, so that the concentricity difference caused by the movement of the left support bearing 3 is avoided; the left clamp spring 2 is clamped into the left clamp spring groove 42 to enable the left corrugated gasket 8 to be extruded and deformed, so that the left support bearing 3 can be prevented from loosening, the concentricity is ensured, the smooth running of the middle shaft is further ensured, the impact on the left support bearing 3 can be relieved, and the service life of the bearing is further prolonged; the left dustproof cover 10 is connected to the toothless left wrist 4, so that dust can be prevented from entering the left support bearing 3, and the dustproof effect is good; the five-way pipe only needs to be processed into the through hole at one time, so that threads on two sides are prevented from being processed, and the concentricity of two sides of the five-way pipe is improved; the outer sides of the toothless left wrist and the toothless right wrist are processed into cylinders, so that the concentricity of the toothless left wrist, the toothless right wrist and the five-way pipe after being matched is improved, and further the concentricity of the left support bearing and the right support bearing is improved; the left threaded hole 44 and the right threaded hole 54 can be matched with tools to separate the left toothless wrist 4 and the right toothless wrist 5 from the five-way pipe, so that the replacement is convenient; the left dust cap 10 may be attached to the left toothless wrist 4 via a left threaded hole 44, and the right dust cap 13 may be attached to the right toothless wrist 5 via a right threaded hole 54.

Claims (5)

1. The toothless middle shaft bowl group is characterized in that: the middle shaft (1) is sequentially sleeved with a left clamp spring (2), a left support bearing (3), a toothless left wrist (4), a toothless right wrist (5), a right support bearing (6) and a right clamp spring (7) from left to right; the middle shaft (1) is provided with a left step (11) positioned at the left side of the middle shaft (1) and a right step (12) positioned at the right side of the middle shaft (1); the left side of the toothless left wrist (4) is provided with a left annular step (41) and a left clamp spring groove (42), and the right side of the toothless left wrist is matched with the left step (11); the right side of the toothless right wrist (5) is provided with a right annular step (51) and a right clamp spring groove (52), and the left side of the toothless right wrist is matched with the right step (12); the left annular step (41) is sleeved with the left support bearing (3), and the right annular step (51) is sleeved with the right support bearing (6); the left clamp spring groove (42) is sleeved with the left clamp spring (2), and the right clamp spring groove (52) is sleeved with the right clamp spring (7).

2. The toothless bottom bracket shell assembly as claimed in claim 1, wherein: a left wave-shaped gasket (8) is arranged between the left clamp spring (2) and the left support bearing (3), and a right wave-shaped gasket (9) is arranged between the right clamp spring (7) and the right support bearing (6).

3. The toothless bottom bracket shell assembly as claimed in claim 1, wherein: the left side of the toothless left wrist (4) is connected with a left dust cover (10) which is sleeved with the middle shaft (1), and the right side of the toothless right wrist (5) is connected with a right dust cover (13) which is sleeved with the middle shaft (1).

4. The toothless bottom bracket shell assembly as claimed in claim 1, wherein: the toothless left wrist (4) is provided with a left limiting part (43), and the toothless right wrist (5) is provided with a right limiting part (53).

5. The toothless bottom bracket shell assembly as claimed in any one of claims 1 to 4, wherein: the left end of the toothless left wrist (4) is provided with left threaded holes (44) which are uniformly distributed, and the right end of the toothless right wrist (5) is provided with right threaded holes (54) which are uniformly distributed.

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