A clamping block for a linear guide shaft

Abstract

A clamping block for a linear guide shaft includes a body, a wear-resistant layer, and an elastic ring. The body includes a clamping arc surface, a spring receiving hole, and an elastic ring receiving groove. The central axis of the clamping arc surface is perpendicular to the central axis of the body and the central axis of the clamping arc surface intersects with the central axis of the body. The arch height of the arc where the contour line of the clamping arc surface lies is less than the diameter of the arc. The central axis of the spring receiving hole coincides with the central axis of the body. The wear-resistant layer is adhered to the clamping arc surface, and the elastic ring is received in the elastic ring receiving groove and part of the elastic ring is exposed from the elastic ring receiving groove. The clamping block of the linear guide shaft can make up for the loss of contact surface between the wear-resistant layer and the shaft due to friction in a timely manner, so that the clamping block can always be tightly pressed against the clamping arc surface of the mating shaft, thereby achieving the purpose of eliminating the gap.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, and in particular to a clamping block of a linear guide shaft. Background Art

[0002] In the matching application of ordinary linear bearing finished products, the product is first assembled into the matching bearing seat sleeve for fixing and positioning. Then the inner diameter of the bearing is matched with the outer diameter of the diameter bearing, and then the linear operation is carried out. However, in actual matching, the inner diameter of the bearing is the upper tolerance, and the outer diameter of the linear bearing is the lower tolerance. When the two are matched, they are sometimes too loose, and the gap is too large, which will affect the performance accuracy during use. When the inner diameter of the bearing is the lower tolerance and the linear bearing is the upper tolerance, the two are tight and there is no gap when they are matched. Not only will excessive energy be consumed during use, but the outer diameter surface roughness of the linear bearing will also be easily damaged, thus affecting its performance. At the same time, even if the precision of the linear bearing and the bearing seat is very high, after a period of use, the inner diameter gap between the shaft and the bearing will increase due to the wear between the original linear bearing and the bearing, which will cause vibration and noise during the movement, and even the linear accuracy cannot be guaranteed, thereby shortening the service life and affecting the operating life of other parts of the whole machine. Summary of the invention

[0003] In view of this, the present invention provides a clamping block for a linear guide shaft that can avoid the above-mentioned problems.

[0004] A clamping block for a linear guide shaft comprises a body, a wear-resistant layer disposed on the body, and at least one elastic ring disposed on the body. The body is cylindrical and comprises a clamping arc surface disposed at one end of the body, a spring receiving hole disposed at the other end of the body, and at least one elastic ring receiving groove disposed on the side wall of the body. On a cross section along the central axis of the body and perpendicular to the central axis of the clamping arc surface, the central axis of the clamping arc surface is perpendicular to the central axis of the body and the central axis of the clamping arc surface intersects with the central axis of the body. On a cross section along the central axis of the body and perpendicular to the central axis of the clamping arc surface, the arch height of the arc where the contour line of the clamping arc surface is located is less than the diameter of the arc. The central axis of the spring receiving hole coincides with the central axis of the body. The elastic ring receiving groove is disposed on the side wall of the body. The wear-resistant layer is adhered to the clamping arc surface, and the elastic ring is received in the elastic ring receiving groove and a portion of the elastic ring is exposed from the elastic ring receiving groove.

[0005] Furthermore, the number of the elastic ring receiving grooves is two, and the two elastic ring receiving grooves are arranged at intervals.

[0006] Furthermore, the elastic ring receiving groove is a circular groove.

[0007] Furthermore, the elastic ring receiving groove is a square groove.

[0008] Furthermore, the clamping block of the linear guide shaft also includes an adhesive layer for bonding the clamping arc surface and the wear-resistant layer.

[0009] Furthermore, the wear-resistant layer is made of a material with a friction coefficient not exceeding 0.25.

[0010] Furthermore, the peel strength of the adhesive layer is at least 12 N / cm.

[0011] Furthermore, the Shore hardness of the elastic ring is at least 65A-95A.

[0012] Furthermore, the elastic ring is an O-ring.

[0013] Furthermore, the body is made of a material having a compressive strength of at least 39 MPa.

[0014] Compared with the prior art, the clamping block of the linear guide shaft provided by the present invention is provided with a clamping spring between the spring receiving hole and the mounting housing, so that the wear-resistant layer always presses against the clamping arc surface of the mating shaft, so that the loss of the contact surface caused by the friction between the wear-resistant layer and the shaft can be compensated in time, and then the clamping block can always press against the clamping arc surface of the mating shaft tightly, so as to achieve the purpose of eliminating the gap. At the same time, due to the existence of the elastic ring, the elastic deformation of the elastic ring can be used to eliminate the gap between the body and the mating seat hole, so as to achieve the purpose of eliminating the impact noise between the body and the mating seat hole caused by the friction of the shaft movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the exploded structure of the clamping block of the linear guide shaft provided by the present invention.

[0016] Figure 2 for Figure 1 Schematic diagram of the assembly structure of the clamping block of the linear guide shaft.

[0017] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the clamping block of the linear guide shaft DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are further described in detail below. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0019] like Figures 1 to 3As shown, it is a schematic diagram of the structure of the clamping block of the linear guide shaft provided by the present invention. The clamping block of the linear guide shaft includes a body 10, a wear-resistant layer 20 arranged on the body 10, an adhesive layer 30 for bonding between the body 10 and the wear-resistant layer 20, and at least one elastic ring 40 arranged on the body 10. It can be imagined that the clamping block of the linear guide shaft is assembled in a mounting shell, and the mounting shell is also provided with a matching seat hole for accommodating the body 10, etc., which is not in the Figure 1 However, it should be the prior art and will not be described here.

[0020] The body 10 is cylindrical and can be made of a material with a compressive strength of at least 39 MPa. Preferably, the body 10 is made of a material with a compressive strength of at least 60 MPa. The body 10 includes a compression arc surface 11 arranged at one end of the body 10, a spring receiving hole 12 arranged at the other end of the body 10, and at least one elastic ring receiving groove 13 arranged on the side wall of the body 10. On the cross section along the central axis of the body 10 and perpendicular to the central axis of the compression arc surface 11, the central axis of the compression arc surface 11 is perpendicular to the central axis of the body 10 and the central axis of the compression arc surface 11 intersects with the central axis of the body 10, so as to facilitate the compression of the compression arc surface 11 and the matching axis. The central axis of the spring receiving hole 12 coincides with the central axis of the body 10 and is used to accommodate a compression spring (not shown). The compression spring is used to provide sufficient clamping force for the body 10. The number of the elastic ring receiving grooves 13 can be one or more. In this embodiment, there are two elastic ring receiving grooves 13. The elastic ring receiving grooves 13 can be circular grooves or square grooves. The square groove is conducive to providing a certain accommodation space for the elastic ring 40, so that when the elastic ring receiving groove 13 is squeezed, it can accommodate the squeezed elastic ring 40. The circular groove can avoid the range of movement of the elastic ring 40. Therefore, the square groove and the circular groove can be suitable for different matching tolerances.

[0021] The wear-resistant layer 20 is arranged on the pressing arc surface 11, and can be made of a material with a friction coefficient not exceeding 0.25. Preferably, the wear-resistant layer 20 can be made of a material with a friction coefficient not exceeding 0.2, such as a rubber sheet, a glass fiber sheet, etc. The shape of the wear-resistant layer 20 should be the same as that of the pressing arc surface 11.

[0022] The adhesive layer 30 is used to bond the wear-resistant layer 20 to the pressing arc surface 11. The peel strength of the adhesive layer 30 is at least 12N / cm. Preferably, the peel strength of the adhesive layer 30 is at least 12N / cm. The material of the adhesive layer 30 is first coated on the pressing arc surface 11, then covered with the wear-resistant layer 20, and finally dried by high temperature or ultraviolet rays.

[0023] The elastic ring 40 may be an O-ring, which is loaded in the elastic ring receiving groove 13, and the number of the O-ring is equal to the number of the elastic ring receiving groove 13. The elastic ring 40 may be made of rubber, silicone and other materials, but the Shore hardness of the elastic ring 40 is at least 65A-95A, preferably, the Shore hardness of the elastic ring 40 is at least 70A-90A.

[0024] Compared with the prior art, the clamping block of the linear guide shaft provided by the present invention is provided with a clamping spring between the spring receiving hole 12 and the mounting shell, so that the wear-resistant layer 20 always presses against the clamping arc surface 11 of the mating shaft, so that the loss of the contact surface caused by the friction between the wear-resistant layer 20 and the shaft can be compensated in time, and then the clamping block can always press against the clamping arc surface 11 of the mating shaft tightly, so as to achieve the purpose of eliminating the gap. At the same time, due to the existence of the elastic ring 40, the elastic deformation of the elastic ring 40 can be used to eliminate the gap between the body 10 and the mating seat hole, so as to achieve the purpose of eliminating the impact noise between the body and the mating seat hole caused by the friction of the shaft movement.

[0025] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. A clamping block for a linear guide shaft, characterized in that: The clamping block of the linear guide shaft includes a body, a wear-resistant layer arranged on the body, and at least one elastic ring arranged on the body. The body is cylindrical and includes a clamping arc surface arranged at one end of the body, a spring receiving hole arranged at the other end of the body, and at least one elastic ring receiving groove arranged on the side wall of the body. In a cross section along the central axis of the body and perpendicular to the central axis of the clamping arc surface, the central axis of the clamping arc surface is perpendicular to the central axis of the body and the central axis of the clamping arc surface intersects with the central axis of the body. The arch height of the arc where the contour line of the clamping arc surface is located on the cross section perpendicular to the central axis of the clamping arc surface is less than the diameter of the arc, the central axis of the spring receiving hole coincides with the central axis of the main body, the elastic ring receiving groove is arranged on the side wall of the main body, the wear-resistant layer is adhered to the clamping arc surface, the elastic ring is accommodated in the elastic ring receiving groove and part of the elastic ring is exposed from the elastic ring receiving groove, the number of the elastic ring receiving grooves is two, and the two elastic ring receiving grooves are arranged at intervals, and the clamping block of the linear guide shaft also includes an adhesive layer for bonding the clamping arc surface and the wear-resistant layer.

2. The clamping block of the linear guide shaft according to claim 1, characterized in that: The elastic ring receiving groove is a circular groove.

3. The clamping block of the linear guide shaft according to claim 1, characterized in that: The elastic ring receiving groove is a square groove.

4. The clamping block of the linear guide shaft according to claim 1, characterized in that: The wear-resistant layer is made of a material with a friction coefficient not exceeding 0.

25.

5. The clamping block of the linear guide shaft according to claim 1, characterized in that: The peel strength of the adhesive layer is at least 12 N / cm.

6. The clamping block of the linear guide shaft according to claim 1, characterized in that: The Shore hardness of the elastic ring is at least 65A-95A.

7. The clamping block of the linear guide shaft according to claim 6, characterized in that: The elastic ring is an O-ring.

8. The clamping block of the linear guide shaft according to claim 1, characterized in that: The body is made of a material with a compressive strength of at least 39 MPa.

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