Supporting shaft with high precision and long service life

Abstract

The utility model discloses a support shaft with high precision and long service life, which relates to the technical field of support shafts and comprises a support shaft main body, and two ends of the support shaft main body are respectively and fixedly sleeved with a group of mounting mechanisms; the supporting shaft body comprises a main shaft body, the two ends of the main shaft body communicate with a set of connectors correspondingly, a two-way threaded rod is rotationally connected between the two sets of connectors, the outer wall of the two-way threaded rod is in threaded connection with a sliding sleeve, and the outer wall of the sliding sleeve is fixedly connected with two sets of inclined blocks. The directions of threads arranged at the connecting positions of the two-way threaded rod and the two sliding sleeves are opposite. The gear and other components are arranged outside the main shaft body in a sleeving mode, a wrench is used for driving the two-way threaded rod to rotate, the limiting strips slide towards the outer portion of the main shaft body, and therefore the gear is connected with the limiting strips in an abutting mode, and the gear can be rapidly and efficiently fixed to the supporting shaft; and enough stability can be ensured in the rotating process of the main shaft body.

Description

Technical Field

[0001] The utility model relates to the technical field of support shafts, in particular to a high-precision and long-life support shaft. Background Art

[0002] The support shaft is a type of shaft, a mechanical component that plays a supporting and fixing role. It is mainly round or square in shape and can be seen everywhere in people's daily lives. Traditional support shafts cannot buffer external forces when in use. When hit by external forces, they are prone to scratches, dents, and breaks. At the same time, when used in rainy days, they cannot play a waterproof role and are prone to rust, which affects the use of the support shaft.

[0003] The existing patent (publication number: CN214999096U) discloses a high-precision and long-life support shaft, including a shaft body, two groups of hollow tubes are fixedly installed on the outer walls of both sides of the shaft body, and a sealing ring is movably installed inside the hollow tube, a cross bar is fixedly installed on the outer wall of the side away from the sealing ring, and a silicone pad is fixedly installed on one end of the cross bar, a fixing block is fixedly installed on the outer surface of the hollow tube, and a compression spring is fixedly installed between the outer wall positions of one side where the fixing block and the silicone pad are close to each other, a protective plate is fixedly installed between the outer wall positions of one side of the four groups of silicone pads, and several groups of vertical rods are fixedly installed on the upper and lower surfaces of the protective plate, and a sliding block is fixedly installed on the upper end of the vertical rod, which can effectively buffer external force through a vibration structure, thereby protecting the stability of the shaft body and increasing its service life. At the same time, it can also drain water to avoid siltation and intrusion, thereby reducing the possibility of rust.

[0004] However, the above technical solution still has certain defects. During use, the above support shaft needs to be fixed through the existing technology using bolts or positioning pins and other structures. During the fixing process, the center of gravity of the support shaft will be shifted, resulting in insufficient stability during the rotation of the support shaft. For this reason, a high-precision and long-life support shaft is proposed. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a high-precision and long-life support shaft to solve the technical problems raised in the above background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-precision and long-life support shaft, comprising a support shaft body, wherein a set of mounting mechanisms are fixedly sleeved on both ends of the support shaft body;

[0007] The support shaft body includes a main shaft body, both ends of the main shaft body are respectively connected with a group of connecting heads, a two-way threaded rod is rotatably connected between the two groups of connecting heads, the outer wall of the two-way threaded rod is threadedly connected with a sliding sleeve, the outer wall of the sliding sleeve is fixedly connected with two groups of inclined blocks, the two-way threaded rod is arranged in opposite directions at the connection between the two groups of sliding sleeves, the inner wall of the main shaft body is slidably connected with multiple groups of limit strips, each group of the inclined blocks is respectively abutted against the bottom end of a group of limit strips, and the limit strip is fixedly connected with a slider at the connection with the main shaft body.

[0008] As a preferred technical solution for a high-precision and long-life support shaft of the utility model, a return spring is fixedly connected to the top of the sliding block, and the end of the return spring is fixedly connected to the inner wall of the main shaft body.

[0009] As a preferred technical solution for a high-precision and long-life support shaft of the utility model, the mounting mechanism includes a fixing seat, a top end of which is provided with an upper cover plate, and the upper cover plate is fixed to the top end of the fixing seat by bolts.

[0010] As an optimal technical solution for a high-precision and long-life support shaft of the utility model, an outer sleeve is fixed between the upper cover plate and the fixed seat, an inner sleeve is rotatably connected inside the outer sleeve, and the inner sleeve is fixedly mounted on the outer wall of the connector.

[0011] As an optimal technical solution for a high-precision and long-life support shaft of the utility model, the outer sleeve is fixedly connected with multiple groups of graphite blocks at the connection with the outer sleeve, and the side wall of the outer sleeve is fixedly connected with two groups of dust rings.

[0012] As an optimal technical solution for a high-precision and long-life support shaft of the utility model, the dustproof ring is made of nitrile rubber.

[0013] As an optimal technical solution for a high-precision and long-life support shaft of the utility model, the outer wall of the main shaft body is provided with a chrome-plated coating.

[0014] In summary, the utility model mainly has the following beneficial effects:

[0015] 1. The utility model sets the gear and other parts on the outside of the main shaft body, uses a wrench to drive the two-way threaded rod to rotate, so that the limit bar slides to the outside of the main shaft body, so that the gear is abutted by the limit bar, so that the gear can be quickly and efficiently fixed on the support shaft, and because the limit bar is symmetrically arranged, it is ensured that the main shaft body can be sufficiently stable during rotation;

[0016] 2. The utility model arranges the inner shaft sleeve fixing sleeve on the outside of the connecting head, fixes the fixing seat with bolts, drives the fixing sleeve to rotate during the rotation of the support shaft body, utilizes the graphite block to rub the graphite block during the rotation of the inner shaft sleeve, and fills the graphite powder between the inner shaft sleeve and the outer shaft sleeve to play a lubricating role, thereby reducing the friction between the inner shaft sleeve and the outer shaft sleeve, ensuring that the support shaft body is smooth enough during use and reducing the wear of the support shaft body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the support shaft body of the utility model;

[0019] Figure 3 It is a schematic diagram of the exploded structure of the installation mechanism of the utility model.

[0020] In the figure: 1. Support shaft body; 2. Mounting mechanism;

[0021] 101, spindle body; 102, connector; 103, bidirectional threaded rod; 104, sleeve; 105, inclined block; 106, limit strip; 107, slider; 108, return spring;

[0022] 201, fixed seat; 202, upper cover plate; 203, outer sleeve; 204, inner sleeve; 205, graphite block; 206, dust ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0024] The following describes an embodiment of the utility model based on its overall structure.

[0025] A high-precision, long-life support shaft, such as Figures 1 to 3 As shown, it comprises a support shaft body 1, and a set of mounting mechanisms 2 are fixedly sleeved on both ends of the support shaft body 1;

[0026] The support shaft body 1 includes a main shaft body 101, and the two ends of the main shaft body 101 are respectively connected with a group of connecting heads 102, and a bidirectional threaded rod 103 is rotatably connected between the two groups of connecting heads 102, and the outer wall of the bidirectional threaded rod 103 is threadedly connected with a sliding sleeve 104, and the outer wall of the sliding sleeve 104 is fixedly connected with two groups of inclined blocks 105, and the thread directions of the bidirectional threaded rod 103 are opposite to those of the two groups of sliding sleeves 104. The inner wall of the main shaft body 101 is slidably connected with multiple groups of limit bars 106, and each group of inclined blocks 105 respectively abuts against the bottom end of a group of limit bars 106, and the limit bar 106 is fixedly connected with a slider 107 at the connection with the main shaft body 101, and the top of the slider 107 is fixedly connected with a reset spring 108, and the end of the reset spring 108 is fixedly connected to the inner wall of the main shaft body 101.

[0027] By arranging the gear sleeve on the outside of the main shaft body 101, and then using a wrench to drive the bidirectional threaded rod 103, the bidirectional thread drives the two sets of sliding sleeves 104 to approach each other, and the process of the two sets of sliding sleeves 104 approaching each other drives the inclined blocks 105 to approach each other, so that the inclined blocks 105 push the limit bar 106 to slide to the outside of the main shaft body 101, and the limit bar 106 drives the slider 107 to compress the reset spring 108, so that the limit pin is tightly fitted to the inner wall of the gear, so that the gear is fixed. On the outer wall of the main shaft body 101, when the gear needs to be removed from the main shaft body 101, the two sets of sliding sleeves 104 are moved away from each other by rotating the bidirectional threaded rod 103 in the opposite direction, thereby driving the inclined block 105 to reset. At this time, the limit bar 106 loses the push of the inclined block 105, so that the reset spring 108 rebounds and pushes the slider 107 to reset, thereby driving the limit bar 106 to reset. At this time, the gear is no longer tightly fitted with the limit bar 106, so that the gear can be removed from the main shaft body 101.

[0028] Please refer to Figure 3 The mounting mechanism 2 includes a fixed seat 201, a top cover plate 202 is arranged on the top of the fixed seat 201, the top cover plate 202 is fixed to the top of the fixed seat 201 by bolts, an outer sleeve 203 is fixedly sleeved between the upper cover plate 202 and the fixed seat 201, an inner sleeve 204 is rotatably connected inside the outer sleeve 203, the inner sleeve 204 is fixedly sleeved on the outer wall of the connector 102, the outer sleeve 203 is fixedly connected with multiple groups of graphite blocks 205 at the connection with the outer sleeve 203, two groups of dust rings 206 are fixedly connected to the side wall of the outer sleeve 203, the dust ring 206 is made of nitrile rubber, and the outer wall of the spindle body 101 is provided with a chrome coating.

[0029] The fixing seat 201 is fixed by bolts, and the inner sleeve 204 is fixedly mounted on the outside of the connecting head 102. When the connecting shaft rotates, the inner sleeve 204 is driven to rotate. During the rotation of the inner sleeve 204, the graphite block 205 is rubbed by the inner sleeve 204, thereby generating graphite powder. The graphite powder is filled in the inner sleeve 204 and the outer sleeve 203. The lubricity of the graphite powder is used to lubricate the inner sleeve 204 and the outer sleeve 203, so that the rotation of the supporting shaft body 1 can be smoother and the friction during the rotation is reduced.

[0030] When in use, by sleeved gears and other components on the outside of the main shaft body 101, use a wrench to drive the bidirectional threaded rod 103 to rotate, so that the limit bar 106 slides to the outside of the main shaft body 101, so that the gear is abutted by the limit bar 106, so that the gear can be quickly and efficiently fixed on the support shaft, and because the limit bar 106 is symmetrically arranged, it is guaranteed to be sufficiently stable during the rotation of the main shaft body 101. The parts not involved in the device are the same as the prior art or can be implemented using the prior art.

[0031] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A high-precision and long-life support shaft, comprising a support shaft body (1), characterized in that: A set of mounting mechanisms (2) are respectively fixedly sleeved on the two ends of the support shaft body (1); The support shaft body (1) comprises a main shaft body (101), two ends of the main shaft body (101) are respectively connected with a group of connecting heads (102), a bidirectional threaded rod (103) is rotatably connected between the two groups of connecting heads (102), the outer wall of the bidirectional threaded rod (103) is threadedly connected with a sliding sleeve (104), the outer wall of the sliding sleeve (104) is fixedly connected with two groups of inclined blocks (105), the thread directions of the bidirectional threaded rod (103) at the connection with the two groups of sliding sleeves (104) are opposite, the inner wall of the main shaft body (101) is slidably connected with multiple groups of limit strips (106), each group of the inclined blocks (105) is respectively abutted against the bottom end of a group of limit strips (106), and the limit strip (106) is fixedly connected with a slider (107) at the connection with the main shaft body (101).

2. A high-precision and long-life support shaft according to claim 1, characterized in that: A return spring (108) is fixedly connected to the top end of the sliding block (107), and the end of the return spring (108) is fixedly connected to the inner wall of the main shaft body (101).

3. A high-precision and long-life support shaft according to claim 1, characterized in that: The mounting mechanism (2) comprises a fixing seat (201), the top end of the fixing seat (201) is provided with an upper cover plate (202), and the upper cover plate (202) is fixed to the top end of the fixing seat (201) by means of bolts.

4. A high-precision and long-life support shaft according to claim 3, characterized in that: An outer shaft sleeve (203) is fixedly sleeved between the upper cover plate (202) and the fixed seat (201), and an inner shaft sleeve (204) is rotatably connected inside the outer shaft sleeve (203), and the inner shaft sleeve (204) is fixedly sleeved on the outer wall of the connecting head (102).

5. A high-precision and long-life support shaft according to claim 4, characterized in that: The outer sleeve (203) is fixedly connected to a plurality of graphite blocks (205) at a connection with the outer sleeve (203), and the side wall of the outer sleeve (203) is fixedly connected to two groups of dustproof rings (206).

6. A high-precision and long-life support shaft according to claim 5, characterized in that: The dustproof ring (206) is made of nitrile rubber.

7. The high-precision and long-life support shaft according to claim 1, characterized in that: The outer wall of the main shaft body (101) is provided with a chrome coating.

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