Low-speed directional reciprocating type linear bearing

Abstract

The utility model relates to the technical field of bearings, in particular to a directional reciprocating type bearing structure which comprises a bearing rod, the left end of the periphery of the bearing rod is sleeved with a bearing sleeve, a plurality of sliding grooves are formed in the inner wall of the bearing sleeve, retainers are slidably connected into the sliding grooves and fixed to the periphery of the bearing rod, a plurality of steel balls are rotationally connected to the middle of each retainer, first ball grooves are formed in the sliding grooves, and a plurality of second ball grooves are formed in the periphery of the bearing rod. The retainer is matched in the sliding groove, the steel balls roll in the first ball groove and the second ball groove, and the retainer slides in the sliding groove, so that the rolling effect of the steel balls is achieved, rigid hard friction is generated between the bearing rod and the bearing sleeve through the retainer, the rigidity is improved, and the rolling double insurance of the steel balls is achieved; therefore, the problem of insufficient rigidity of a single steel ball is solved, and the problem that the bearing rod and the bearing sleeve are seriously abraded due to sliding friction is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a low-speed directional reciprocating linear bearing. Background Art

[0002] Linear bearings are commonly used components in mechanical equipment to achieve linear motion. Linear bearings are a low-cost linear motion system used in conjunction with guide shafts in linear travel. Since the bearing ball is in point contact with the outer ring of the bearing, the ball rolls with minimal friction resistance, so linear bearings have the characteristics of low friction and stable motion, thereby achieving smooth linear motion with high sensitivity and high precision.

[0003] In the prior art, when the bearing rod moves linearly in the bearing sleeve, since only the steel ball is subjected to force, if it moves only through the sliding friction between the bearing rod and the bearing sleeve, the simple sliding friction will easily cause the bearing rod and the bearing sleeve to be severely worn due to the sliding friction. Therefore, how to reduce the problem of severe sliding friction and wear between the bearing rod and the bearing sleeve needs to be improved. Utility Model Content

[0004] The utility model provides a low-speed directional reciprocating linear bearing, which is beneficial to effectively ensure the stability of the directional reciprocating movement of the bearing rod and reduce the problem of serious wear due to friction between the bearing rod and the bearing sleeve.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A low speed directional reciprocating linear bearing including a bearing rod;

[0007] A bearing sleeve is provided at the left end of the outer periphery of the bearing rod, and a plurality of slide grooves are opened on the inner wall of the bearing sleeve. A retaining frame is slidably connected in the slide grooves. The retaining frames are fixed to the outer periphery of the bearing rod, and a plurality of steel balls are rotatably connected in the middle of the retaining frame. A first ball groove is opened in the slide groove, and a plurality of second ball grooves are opened on the outer periphery of the bearing rod.

[0008] Furthermore, the outer surface of the steel ball is adapted to the first ball groove, and the inner surface of the steel ball is adapted to the second ball groove.

[0009] Furthermore, a bearing contact surface is provided on the inner wall of the bearing sleeve, and a shaft sleeve contact surface is provided on the outer surface of the bearing rod, and the bearing rod matches the bearing contact surface of the bearing sleeve through the shaft sleeve contact surface.

[0010] Furthermore, a protective sleeve is provided on the right side of the bearing sleeve and is sleeved on the outer periphery of the bearing rod.

[0011] Furthermore, a fixing sleeve is sleeved on the middle part of the outer periphery of the bearing rod, and the fixing sleeve is matched in the protective sleeve.

[0012] Beneficial effects of the utility model:

[0013] By matching the retaining frame to the slide groove, as the steel balls roll in the first ball groove and the second ball groove, and the retaining frame slides in the slide groove, there is not only the steel ball rolling effect, but also the rigid hard friction between the bearing rod and the bearing sleeve through the retaining frame, which improves the rigidity and has the double insurance of steel ball rolling, thus solving the problem of insufficient rigidity of a single steel ball and effectively reducing the problem of severe wear of the bearing rod and the bearing sleeve due to sliding friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a side view structural diagram of the bearing rod and bearing sleeve combination of the utility model;

[0016] Figure 3 This is a side structural schematic diagram of the bearing sleeve of the utility model;

[0017] Figure 4 It is a side view structural diagram of the bearing rod of the utility model;

[0018] Figure 5 It is a schematic diagram of the retainer structure of the utility model;

[0019] Figure 6 It is a schematic diagram of the overall split structure of the shaft of the utility model.

[0020] Description of reference numerals:

[0021] Bearing rod 1, bearing sleeve 2, slide groove 3, retaining frame 4, first ball groove 5, steel ball 6, second ball groove 7, fixing sleeve 8, protective sleeve 9. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0023] like Figure 1-6As shown, in this embodiment, it includes a bearing rod 1, and the left end of the outer periphery of the bearing rod 1 is sleeved with a bearing sleeve 2, and the inner wall of the bearing sleeve 2 is provided with a plurality of slide grooves 3, and the slide grooves 3 are slidably connected with retaining frames 4, and the retaining frames 4 are fixed to the outer periphery of the bearing rod 1, and a plurality of steel balls 6 are rotatably connected to the middle part of the retaining frame 4, and the slide grooves 3 are provided with first ball grooves 5, and the outer periphery of the bearing rod 1 is provided with a plurality of second ball grooves 7, the outer surface of the steel ball 6 is adapted to the first ball groove 5, and the inner surface of the steel ball 6 is adapted to the second ball groove 7, the inner wall of the bearing sleeve 2 is provided with a bearing contact surface, and the outer surface of the bearing rod 1 is provided with a sleeve contact surface, and the bearing rod 1 is matched with the bearing contact surface of the bearing sleeve 2 through the sleeve contact surface.

[0024] By matching the retainer 4 to the slide groove 3, since the steel ball 6 rolls in the first ball groove 5 and the second ball groove 7, and the retainer 4 slides in the slide groove 3, the bearing rod 1 contacts the steel ball 6 to generate rolling friction, and then rigid sliding is achieved by the sliding of the retainer 4 in the slide groove 3, and then the orientation is maintained by the steel ball 6 plus the slide groove 3, the steel ball 6 contacts the bearing sleeve 2, and the retainer 4 slides in the slide groove 3, and the bearing rod 1 contacts the bearing rod 1 contact surface of the bearing sleeve 2 through the sleeve contact surface, thereby achieving the purpose of rolling and sliding, and not only the rolling effect of the steel ball 6, but also the rigid hard friction generated between the bearing rod 1 and the bearing sleeve 2 through the retainer 4, the rigidity is improved, and at the same time there is the double insurance of the rolling of the steel ball 6, thereby solving the problem of insufficient rigidity of a single steel ball 6, and effectively reducing the problem of severe wear of the bearing rod 1 and the bearing sleeve 2 due to sliding friction, thereby effectively ensuring the stability of the directional reciprocating movement of the bearing rod 1 in the bearing sleeve 2.

[0025] like Figure 1 , 6 As shown, in this embodiment, a protective sleeve 9 is provided on the right side of the bearing sleeve 2 and is sleeved on the outer periphery of the bearing rod 1.

[0026] By providing the protective sleeve 9, the bearing rod 1 is protected, which is beneficial to ensuring the service life of the bearing rod 1.

[0027] like Figure 1 , 6 As shown, in this embodiment, a fixing sleeve 8 is sleeved on the middle part of the outer periphery of the bearing rod 1 , and the fixing sleeve 8 is matched in the protective sleeve 9 .

[0028] The fixing sleeve 8 is installed between the protective sleeve 9 and the bearing rod 1, which is beneficial to reducing the prestress on the bearing rod 1.

[0029] All technical features in this embodiment can be freely combined according to actual needs.

[0030] The above embodiments are preferred implementation schemes of the present invention. In addition, other implementation schemes are also included. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A low-speed directional reciprocating linear bearing, comprising a bearing rod (1), characterized in that: A bearing sleeve (2) is sleeved on the left end of the outer periphery of the bearing rod (1), and a plurality of slide grooves (3) are formed on the inner wall of the bearing sleeve (2). A retaining frame (4) is slidably connected in each of the slide grooves (3). The retaining frame (4) is fixed to the outer periphery of the bearing rod (1), and a plurality of steel balls (6) are rotatably connected in the middle of the retaining frame (4). A first ball groove (5) is formed in each of the slide grooves (3), and a plurality of second ball grooves (7) are formed on the outer periphery of the bearing rod (1).

2. The low-speed directional reciprocating linear bearing according to claim 1, characterized in that: The outer surface of the steel ball (6) is adapted to the first ball groove (5), and the inner surface of the steel ball (6) is adapted to the second ball groove (7).

3. The low-speed directional reciprocating linear bearing according to claim 1, characterized in that: The inner wall of the bearing sleeve (2) is provided with a bearing contact surface, the outer surface of the bearing rod (1) is provided with a shaft sleeve contact surface, and the bearing rod (1) matches the bearing contact surface of the bearing sleeve (2) through the shaft sleeve contact surface.

4. The low-speed directional reciprocating linear bearing according to claim 1, characterized in that: A protective sleeve (9) is provided on the right side of the bearing sleeve (2) and is sleeved on the outer periphery of the bearing rod (1).

5. The low-speed directional reciprocating linear bearing according to claim 4, characterized in that: A fixing sleeve (8) is sleeved on the middle part of the outer periphery of the bearing rod (1), and the fixing sleeve (8) is matched in the protective sleeve (9).

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