Push-pull flexible shaft
By designing an open structure for adding lubricant in the push-pull soft shaft, the problem that existing push-pull soft shafts are inconvenient to add lubricant is solved, and the push-pull effect and service life are improved.
Patent Information
- Application Number
- CN202421410746.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The existing push-pull soft shafts are inconvenient to add lubricants, which leads to the impact of the push-pull effect, increases the wear of the parts, and has a lower service life.
A push-pull soft shaft is designed, which includes an outer tube sleeve, shaft core and lubricating oil passage. The lubricating oil passage is connected by a connecting pipe and a replenishing pipe. The replenishing pipe is equipped with an opening structure, including a screw, a seal and a rotary button, allowing The user opens the rehydration tube channel by turning the knob to facilitate adding lubricating oil.
This design makes it easy to add lubricant when needed, enhance push-pull effect, reduce component friction and extend service life.
Smart Images
Figure CN222502383U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of push-pull flexible shafts, in particular to a push-pull flexible shaft. Background Art
[0002] The push-pull flexible shaft is a mechanical device for transmitting rotational force and torque, and its working principle is based on the bending and torsion of elastic elements. It consists of a soft rod made of elastic material, fixed on the shaft at both ends and connected to the other parts by fastening devices. When the shaft starts to rotate, one end of the flexible shaft will generate a torque on the shaft, which is transmitted through the length and bending stiffness of the flexible shaft. The bending stiffness of the flexible shaft will bend it into an arc instead of a straight line, so that the rotational force and torque can be transmitted to the other end. At the same time, the flexibility of the flexible shaft enables it to have a certain elastic deformation ability while transmitting rotational force and torque.
[0003] In practical applications, the surface lubricity of the push-pull flexible shaft will decrease after long-term use. It is inconvenient to add lubricant to the existing push-pull flexible shaft, which affects the push-pull effect and increases the wear between components, thus resulting in a shorter service life of the push-pull flexible shaft. Utility Model Content
[0004] The technical problem to be solved by the utility model is that it is inconvenient to add lubricant to the existing push-pull flexible shaft, thereby affecting the push-pull effect and increasing the wear between components.
[0005] In order to solve the above technical problems, the technical solution provided by the utility model is: a push-pull flexible shaft, including a connecting shaft structure, the flexible shaft structure including an outer tube sleeve and an axis core, the axis core passes through the outer tube sleeve, one end of the axis core is an axis core joint, the end of the outer tube sleeve away from the axis core structure is provided with a threaded joint, two nuts are threadedly connected on the threaded joint, a flat washer is provided between the nuts, a connecting pipe is provided at the other end of the threaded joint, a hose is provided at the other end of the connecting pipe, a second connecting shaft structure is provided at the other end of the hose, a lubricating oil channel is formed between the outer tube sleeve and the axis core, and an opening structure for replenishing the lubricating oil channel is provided on the connecting tube.
[0006] As a further solution of the utility model, the opening structure includes a fluid replenishing tube, which is located on the connecting tube and connected to the lubricating oil channel. A fixed tube is connected to the top of the fluid replenishing tube, a screw is threadedly connected to the fixed tube, and a sealing plug is provided under the screw.
[0007] As a further solution of the utility model, a sealing sleeve is provided on the outer tube sleeve.
[0008] As a further solution of the utility model, the fixing tube is provided with an internal thread matched with the bolt, and the upper end of the screw rod extending out of the fixing tube is provided with a knob.
[0009] As a further solution of the utility model, an oil inlet is provided between the liquid replenishing pipe and the lubricating oil channel, the sealing plug is made of rubber material, and the sealing plug has an interference fit with the oil inlet.
[0010] The advantage of the utility model over the prior art is that by providing an opening structure, when the lubricating oil channel needs to be refueled, the knob is turned to drive the screw to rotate. Since the screw cooperates with the fixed pipe thread, the sealing plug is driven to move upward, exposing the fixed pipe and the liquid infusion pipe channel, and then the lubricating oil can be added. This structure is more convenient for adding lubricating oil, and the connection is more reliable, thereby enhancing the push-pull effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a stereoscopic diagram of a push-pull flexible shaft of the utility model.
[0012] Figure 2 The utility model is a main structural schematic diagram of a push-pull flexible shaft.
[0013] Figure 3 The utility model is a schematic diagram of the internal structure of a push-pull flexible shaft.
[0014] Figure 4 It is an enlarged schematic diagram of the A-section structure of a push-pull flexible shaft of the utility model.
[0015] As shown in the figure: 1. Outer tube sleeve; 2. Shaft core; 3. Shaft core joint; 4. Threaded joint; 5. Nut; 6. Flat washer; 7. Connecting pipe; 8. Hose; 9. Lubricating oil channel; 10. Fluid supply pipe; 11. Fixed pipe; 12. Screw; 13. Sealing plug; 14. Sealing sleeve; 15. Rotating shaft; 16. Oil inlet. DETAILED DESCRIPTION
[0016] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0017] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.
[0018] Combined with Figure 1 , Figure 2 A push-pull flexible shaft comprises a connecting shaft structure, wherein the flexible shaft structure comprises an outer tube sleeve 1 and an axis core 2, wherein the axis core 2 passes through the interior of the outer tube sleeve 1, an axis core joint 3 is provided at one end of the axis core 2, a threaded joint 4 is provided at the end of the outer tube sleeve 1 away from the axis core 2 structure, two nuts 5 are threadedly connected to the threaded joint 4, a flat washer 6 is provided between the nuts 5, a connecting pipe 7 is provided at the other end of the threaded joint 4, a hose 8 is provided at the other end of the connecting pipe 7, a second connecting shaft structure is provided at the other end of the hose 8, a sealing sleeve 14 is provided on the outer tube sleeve 1, a lubricating oil passage 9 is formed between the outer tube sleeve 1 and the axis core 2, and an opening structure for supplementing the lubricating oil passage 9 is provided on the connecting tube 7.
[0019] Combined with Figure 3 , Figure 4 The opening structure includes a liquid replenishing tube 10, which is located on the connecting tube 7 and is connected to the lubricating oil channel 9. A fixed tube 11 is connected to the liquid replenishing tube 10, and a screw 12 is connected to the fixed tube 11 through an internal thread. A sealing plug 13 is provided below the screw 12. An internal thread matching the bolt is provided in the fixed tube 11, and a knob 15 is provided at the upper end of the screw 12 extending out of the fixed tube 11. An oil inlet 16 is connected between the liquid replenishing tube 10 and the lubricating oil channel 9. The sealing plug 13 is made of rubber, and the sealing plug 13 has an interference fit with the oil inlet 16.
[0020] When the utility model is implemented, when it is necessary to replenish the lubricating oil channel, the knob is turned to drive the screw to rotate. Since the screw cooperates with the fixed pipe thread, the sealing plug is driven to move up, exposing the fixed pipe and the liquid replenishing pipe channel, and then the lubricating oil can be added. This structure is more convenient for adding lubricating oil and the connection is more reliable. The setting of the sealing plug can more reliably seal the liquid replenishing pipe, enhance the push-pull effect, and avoid the problem of shorter service life caused by large friction between components.
[0021] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.
Claims
1. A push-pull flexible shaft, comprising a connecting shaft structure, wherein the flexible shaft structure comprises an outer tube sleeve (1) and a shaft core (2), wherein the shaft core (2) passes through the interior of the outer tube sleeve (1), and is characterized in that: The shaft core (2) has an shaft core joint (3) at one end, and the outer tube sleeve (1) has a threaded joint (4) at one end away from the shaft core (2) structure, two nuts (5) are threadedly connected to the threaded joint (4), a flat washer (6) is provided between the nuts (5), a connecting pipe (7) is provided at the other end of the threaded joint (4), a hose (8) is provided at the other end of the connecting pipe (7), and a second connecting shaft structure is provided at the other end of the hose (8), a lubricating oil passage (9) is formed between the outer tube sleeve (1) and the shaft core (2), and an opening structure for supplementing the lubricating oil passage (9) is provided on the connecting pipe (7).
2. A push-pull flexible shaft according to claim 1, characterized in that: The opening structure comprises a liquid replenishing tube (10), wherein the liquid replenishing tube (10) is located on the connecting tube (7) and is connected to the lubricating oil passage (9), a fixed tube (11) is provided on the liquid replenishing tube (10), a screw rod (12) is internally threadedly connected to the fixed tube (11), and a sealing plug (13) is provided below the screw rod (12).
3. A push-pull flexible shaft according to claim 1, characterized in that: The outer pipe sleeve (1) is provided with a sealing sleeve (14).
4. A push-pull flexible shaft according to claim 2, characterized in that: The fixing tube (11) is provided with an internal thread matched with the bolt, and the upper end of the screw rod (12) extending out of the fixing tube (11) is provided with a knob (15).
5. The push-pull flexible shaft according to claim 2, characterized in that: An oil inlet (16) is provided between the liquid replenishing pipe (10) and the lubricating oil passage (9), the sealing plug (13) is made of rubber material, and the sealing plug (13) is interference-fitted with the oil inlet (16).