Hollow gear shaft with damping structure

Abstract

The hollow gear shaft with the damping structure comprises a hollow gear shaft body and a damping spring barrel, an installation hole is formed in the hollow gear shaft body, gear shaft open holes are formed in the periphery of the installation hole, a connecting sleeve is arranged on the right side of the installation hole, a fixing block is arranged on the inner wall of the connecting sleeve, and the damping spring barrel is arranged on the fixing block. The damping spring barrel is installed at the upper end of the fixing block, and a buffer pad is arranged at the upper end of the damping spring barrel. According to the hollow gear shaft with the damping structure, through connection between the mounting hole and the mounting shaft, the shaft rod can be conveniently assembled and connected, lubricating oil can be conveniently put into the mounting shaft through the lubricating hole, meanwhile, the lubricating hole communicates with the oil outlet, the lubricating oil can be put into the mounting hole, and the good lubricating and anti-rust effects are achieved; the inserted sealing rod is connected with the lubricating hole in a clamped mode, the detachable shaft rod can be spliced, the damping spring barrel is elastically connected with the buffering cushion, and the buffering and damping effects on the installation shaft can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hollow gear shafts, and specifically relates to a hollow gear shaft with a shock-absorbing structure. Background Art

[0002] A hollow gear shaft is a special gear shaft design, in which a through hole is made in the center of the gear shaft. An internal keyway is opened in this through hole, and a stepped cylinder is machined on the outer surface of the shaft body, and an external keyway is opened. This design makes the hollow gear shaft not only have the characteristics of light weight, but also can transmit rotational motion and torque between the components fixedly connected thereto. The application scenarios of hollow gear shafts are usually in applications that require reducing the shaft weight or high natural frequency. By adopting a hollow design, the weight can be reduced while maintaining the strength and stability of the structure. In addition, the design of the hollow gear shaft also allows a hollow structure to be adopted at the axis position to reduce the self-weight of the rotating shaft, especially in the case where a large torque needs to be transmitted, this design is particularly applicable. Such shaft parts are mainly used to support transmission parts, transmit torque and bear loads, and are one of the typical parts often encountered in hardware fittings. The manufacturing technologies of hollow gear shafts mainly include warm (hot) forging and cold forging technologies, as well as traditional blank forging technologies combined with radial forging technologies. These technologies together constitute an advanced process for the forming of tube, rod (shaft) parts. These technologies are mainly applied to the manufacturing of non-chip manufacturing, low weight, axisymmetric hollow shafts, complex internal forming and high-precision external forming, especially complex structures such as grooved gear shafts that require sealing on both sides.

[0003] For example, in the patent applications with application numbers CN201810716658.0 and CN201620467425.8, the present invention discloses a hydraulic pump idler gear shaft, including: an idler gear shaft body, which is integrally formed by a shaft shoulder end and a support shaft surface end, and a bolt hole is provided in the center of the idler gear shaft body. A bolt passes through the bolt hole and is screwed on the engine body, so as to fix one end of the idler gear shaft body on the body; a baffle is provided at the other end of the idler gear shaft body; a roller bearing is sleeved on the support shaft surface end; an inclined oil passage and a vertical oil passage are opened on the idler gear shaft body; one end of the inclined oil passage is communicated with the oil passage on the body to introduce lubricating oil, and the other end of the inclined oil passage is communicated with the bolt hole; one end of the vertical oil passage is communicated with the bolt hole; and after the lubricating oil fills the gap between the bolt and the bolt hole under the action of oil pressure through the inclined oil passage, it then sprays upward through the other end of the vertical oil passage to lubricate the roller bearing. Thus, the hydraulic pump idler gear shaft of the present invention omits the processing of the intermediate oil passage, reduces the machining difficulty, and saves the processing cost.

[0004] The similar applications currently still have the following deficiencies:

[0005] There will be a gap between the shaft of the existing device and the mounting sleeve. During operation, the shaft will collide with the mounting sleeve, resulting in wear between the parts.

[0006] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a hollow gear shaft with a shock-absorbing structure is proposed, with the aim of achieving a more practical value. Content of the Utility Model

[0007] The purpose of the present utility model is to provide a hollow gear shaft with a shock-absorbing structure to solve the problems raised in the above background technology.

[0008] To achieve the above purpose, the present utility model provides the following technical solution: A hollow gear shaft with a shock-absorbing structure, including a hollow gear shaft body and a shock-absorbing spring cylinder. An installation hole is provided inside the hollow gear shaft body, and gear shaft openings are provided around the installation hole. A connection sleeve is provided on the right side of the installation hole, and fixing blocks are provided on the inner wall of the connection sleeve. The shock-absorbing spring cylinder is installed at the upper end of the fixing block, and a buffer pad is provided at the upper end of the shock-absorbing spring cylinder.

[0009] Furthermore, the shock-absorbing spring cylinders are distributed in an annular shape around the center of the connection sleeve, and the shock-absorbing spring cylinders and the buffer pad are of an integrated structure.

[0010] Furthermore, an installation shaft is inserted into the installation hole, and a connection shaft rod is provided at the right end of the installation shaft.

[0011] Furthermore, a lubrication hole is provided inside the connection shaft rod, and an insertion sealing rod is inserted into the lubrication hole.

[0012] Furthermore, the insertion sealing rod is in snap-fit connection with the lubrication hole, and a detachable shaft rod is provided at the right end of the insertion sealing rod.

[0013] Furthermore, an oil outlet is provided on the outer wall of the installation shaft, and the oil outlet is in communication connection with the lubrication hole.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. Through the connection between the installation hole and the installation shaft of the present utility model, it is convenient to assemble the connection shaft rod. The lubrication hole facilitates the injection of lubricating oil into the installation shaft. At the same time, the lubrication hole is in communication with the oil outlet, enabling the lubricating oil to be injected into the installation hole, playing a good role in lubrication and rust prevention, effectively preventing rust from occurring during long-term use. The insertion sealing rod is in snap-fit connection with the lubrication hole, which can seal the lubrication hole while allowing the detachable shaft rod to be spliced. The shock-absorbing spring cylinder and the buffer pad form an elastic connection, which can play a role in buffering and shock absorption for the installation shaft. Brief Description of the Drawings

[0016] Figure 1 This is the front view structural schematic diagram of a hollow gear shaft with a shock absorption structure according to the present utility model;

[0017] Figure 2 This is the three-dimensional structural schematic diagram of the fixing block - buffer pad of a hollow gear shaft with a shock absorption structure according to the present utility model;

[0018] Figure 3 This is the three-dimensional structural schematic diagram of the installation shaft of a hollow gear shaft with a shock absorption structure according to the present utility model.

[0019] In the figure: 1, hollow gear shaft body; 2, gear shaft opening; 3, connecting sleeve; 4, installation shaft; 5, connecting shaft rod; 6, lubrication hole; 7, inserted sealing rod; 8, detachable shaft rod; 9, fixing block; 10, shock absorption spring cylinder; 11, buffer pad; 12, installation hole; 13, oil outlet. Specific embodiments

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model.

[0021] The present utility model will be further described below with reference to the accompanying drawings and specific embodiments

[0022] Such as Figures 1 - 3As shown in the figure, a high-precision housing welding fixture includes a hollow gear shaft body 1 and a shock-absorbing spring cylinder 10. An installation hole 12 is provided inside the hollow gear shaft body 1, and gear shaft openings 2 are provided around the installation hole 12. A connecting sleeve 3 is arranged on the right side of the installation hole 12, and a fixing block 9 is arranged on the inner wall of the connecting sleeve 3. The shock-absorbing spring cylinder 10 is installed at the upper end of the fixing block 9, and a buffer pad 11 is arranged at the upper end of the shock-absorbing spring cylinder 10. The shock-absorbing spring cylinders 10 are distributed in an annular shape around the center of the connecting sleeve 3, and the shock-absorbing spring cylinders 10 and the buffer pads 11 are of an integrated structure. An installation shaft 4 is inserted into the installation hole 12, and a connecting shaft rod 5 is arranged at the right end of the installation shaft 4. A lubrication hole 6 is provided inside the connecting shaft rod 5, and an insertion sealing rod 7 is inserted into the lubrication hole 6. The insertion sealing rod 7 is in snap-fit connection with the lubrication hole 6, and a detachable shaft rod 8 is arranged at the right end of the insertion sealing rod 7. An oil outlet 13 is provided on the outer wall of the installation shaft 4, and the oil outlet 13 is in communication connection with the lubrication hole 6. Through the connection between the installation hole 12 and the installation shaft 4, it is convenient to assemble the connecting shaft rod 5, and the lubrication hole 6 is convenient for putting lubricating oil into the installation shaft 4. At the same time, the lubrication hole 6 and the oil outlet 13 are in communication with each other, and the lubricating oil can be put into the installation hole 12, playing a good role in lubrication and rust prevention, effectively preventing rust from occurring during long-term use. The insertion sealing rod 7 is in snap-fit connection with the lubrication hole 6, and while the detachable shaft rod 8 can be spliced, it can seal the lubrication hole 6. The shock-absorbing spring cylinder 10 and the buffer pad 11 form an elastic connection, which can play a role in buffering and shock absorption for the installation shaft 4.

[0023] Working principle: When this hollow gear shaft with a shock-absorbing structure is in use, first, according to Figures 1 - 3 , rotate the installation shaft 4 and put it into the installation hole 12. At the same time, the elastic connection formed between the shock-absorbing spring cylinder 10 and the buffer pad 11 can support the installation shaft 4, buffer the impact force between the installation shaft 4 and the connecting sleeve 3, and reduce the collision between the connecting sleeve 3 and the installation shaft 4. At the same time, put lubricating oil into the installation shaft 4 from the lubrication hole 6. Since the oil outlet 13 is communicated with the lubrication hole 6, the lubricating oil can be discharged from the oil outlet 13, and the discharged lubricating oil can remain in the installation hole 12, thus playing a role in lubrication and protection, preventing rust from occurring inside the installation shaft 4 and the installation hole 12. Second, insert the insertion sealing rod 7 into the lubrication hole 6, which can seal the lubrication hole 6 and install the detachable shaft rod 8 at the same time, thus playing a role in assembly.

[0024] The embodiments of the present utility model are given for purposes of illustration and description, and are not exhaustive or limit the present utility model to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles of the present utility model and its practical applications, and to enable those of ordinary skill in the art to understand the present utility model and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A hollow gear shaft with a shock-absorbing structure, comprising a hollow gear shaft body (1) and a shock-absorbing spring cylinder (10), characterized in that, An installation hole (12) is provided inside the hollow gear shaft body (1), and gear shaft openings (2) are provided around the installation hole (12). A connecting sleeve (3) is arranged on the right side of the installation hole (12), and a fixing block (9) is arranged on the inner wall of the connecting sleeve (3). The shock-absorbing spring cylinder (10) is installed at the upper end of the fixing block (9), and a buffer pad (11) is arranged at the upper end of the shock-absorbing spring cylinder (10).

2. The hollow gear shaft with a shock-absorbing structure according to claim 1, characterized in that, The shock-absorbing spring cylinders (10) are distributed in an annular shape about the center of the connecting sleeve (3), and the shock-absorbing spring cylinders (10) and the buffer pad (11) are of an integrated structure.

3. A hollow gear shaft with a shock-absorbing structure according to claim 1, characterized in that, An installation shaft (4) is inserted through the inside of the installation hole (12), and a connecting shaft rod (5) is arranged at the right end of the installation shaft (4).

4. A hollow gear shaft with a shock-absorbing structure according to claim 3, characterized in that, A lubricating hole (6) is provided inside the connecting shaft rod (5), and an inserted sealing rod (7) is inserted through the inside of the lubricating hole (6).

5. A hollow gear shaft with a shock-absorbing structure according to claim 4, characterized in that, The inserted sealing rod (7) is in snap connection with the lubricating hole (6), and a detachable shaft rod (8) is arranged at the right end of the inserted sealing rod (7).

6. The hollow gear shaft with a shock-absorbing structure according to claim 3, characterized in that, An oil outlet (13) is provided on the outer wall of the installation shaft (4), and the oil outlet (13) is in communication connection with the lubricating hole (6).

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