Threaded rod

Abstract

The utility model discloses a threaded rod which comprises a center rod, trapezoidal threads are arranged on the outer wall of the center rod, the center rod comprises an outer pipe body and an inner pipe body which are coaxially arranged, the outer wall of the inner pipe body is tightly attached to the inner wall of the outer pipe body, and the trapezoidal threads are arranged on the outer wall of the outer pipe body. A main oil guide channel which is arranged on the outer pipe body or the inner pipe body and extends along the axis is formed between the outer pipe body and the inner pipe body, a lubricating groove which extends along the extending track of the trapezoidal thread is formed in the top of the trapezoidal thread, and a branch oil guide channel with one end connected with the outside and the other end connected with the main oil guide channel is formed in the groove bottom of the lubricating groove. The lubricating groove is formed in the center of the top of the trapezoidal thread. The threaded rod has the advantages of being convenient to lubricate, high in transmission precision, complete in overall function and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, and more specifically, it relates to a threaded rod. Background Art

[0002] A sliding fit connection is adopted between a screw rod and a nut that are in transmission with each other. There is friction between the two during transmission, and the friction will cause wear of the components, thereby reducing the transmission accuracy. Therefore, a lubricant needs to be added between the two. The traditional way of adding lubricant is to add a lubricant that is solid at room temperature between the two to ensure that the lubricant does not flow randomly and can also move with the nut. However, under repeated transmission, the lubricant will be squeezed into the blind area, resulting in the loss of lubrication effect and poor overall effect. Accordingly, the utility model proposes a threaded rod. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the above deficiencies in the prior art and provide a threaded rod with the characteristics of convenient lubrication and high transmission accuracy.

[0004] To solve the above technical problems, the purpose of the utility model is realized as follows: A threaded rod according to the utility model includes a central rod. Trapezoidal threads are arranged on the outer wall of the central rod. The central rod includes an outer tube body and an inner tube body arranged coaxially. The outer wall of the inner tube body is closely attached to the inner wall of the outer tube body. The trapezoidal threads are arranged on the outer wall of the outer tube body. A main oil guide channel extending along the axis is provided on the outer tube body or the inner tube body between the outer tube body and the inner tube body. A lubrication groove extending along its extension trajectory is provided at the top of the trapezoidal thread. A branch oil guide channel with one end connected to the outside and the other end connected to the main oil guide channel is provided at the bottom of the lubrication groove.

[0005] The utility model is further arranged as: The lubrication groove is provided at the center of the top of the trapezoidal thread.

[0006] The utility model is further arranged as: The number of the branch oil guide channels is one, and the branch oil guide channel is provided at the middle position of the central rod.

[0007] The utility model is further arranged as: The inner tube body and the outer tube body are in an interference fit relationship.

[0008] The utility model is further arranged as: The branch oil guide channel extends along the radial direction of the central rod.

[0009] The utility model is further arranged as: The main oil guide channel is provided on the outer tube body.

[0010] In summary, the utility model has the following beneficial effects: For the threaded rod involved in the utility model, by injecting lubricant into the main oil guiding channel and guiding it through the branch oil guiding channel, the lubricant can be arranged in the lubricating groove to achieve the lubricating effect on the top surface of the trapezoidal thread. By regularly adding lubricant, continuous lubrication can be maintained between the threaded rod and the connecting component. The lubrication is convenient, the transmission accuracy is high, the overall function is perfect, and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is the overall structural schematic diagram of the utility model;

[0012] Figure 2 is the partial structural schematic diagram of the utility model;

[0013] Figure 3 is the sectional structural schematic diagram of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] In order to enable those skilled in the art to better understand the technical solution of the utility model, the preferred implementation of the utility model will be described below in conjunction with specific embodiments. However, it should be understood that these descriptions are only for further explaining the features and advantages of the utility model, rather than limiting the patent requirements of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0015] The utility model will be further described below in conjunction with the drawings and preferred embodiments.

[0016] Embodiment 1

[0017] Refer to Figures 1 to 3 As shown, a threaded rod involved in this embodiment includes a central rod. A trapezoidal thread 1 is arranged on the outer wall of the central rod. The central rod includes an outer tube body 2 and an inner tube body 3 arranged coaxially. The outer wall of the inner tube body 3 is closely attached to the inner wall of the outer tube body 2. The trapezoidal thread 1 is arranged on the outer wall of the outer tube body 2. A main oil guiding channel 4 is opened between the outer tube body 2 and the inner tube body 3, which is arranged on the outer tube body and extends along the axis. The central part of the top of the trapezoidal thread 1 is provided with a lubricating groove 5 extending along its extension trajectory. A branch oil guiding channel 6 with one end connected to the outside and the other end connected to the main oil guiding channel is opened at the bottom of the lubricating groove 5. The branch oil guiding channel 6 extends along the radial direction of the central rod.

[0018] Furthermore, the inner tube body 3 and the outer tube body 2 are in an interference fit relationship.

[0019] In this embodiment, lubricant is injected into the main oil guiding channel 4. The lubricant flows along the channel and, after passing through the branch oil guiding channel 6, will flow into the lubricating groove 5. The lubricating groove 5 is located between the threaded rod and the components driven thereby, thus playing a role in lubricating the transmission.

[0020] Embodiment 2

[0021] See Figures 1 to 3 As shown, for a threaded rod involved in this embodiment, on the basis of Embodiment 1, it is further set that the number of the branch oil guiding channels 6 is one, and the branch oil guiding channel 6 is arranged at the middle position of the central rod.

[0022] For the threaded rod involved in the present utility model, by injecting lubricant into the main oil guiding channel and guiding it through the branch oil guiding channel, the lubricant can be arranged in the lubricating groove to achieve the lubricating effect on the top surface of the trapezoidal thread. By regularly injecting lubricant, continuous lubrication can be maintained between the threaded rod and the connecting components. The lubrication is convenient, the transmission accuracy is high, the overall function is perfect, and the practicability is strong.

[0023] Unless otherwise clearly specified and defined, in the present utility model, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicating the orientation or positional relationship, it is based on the actual orientation or positional relationship shown. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present utility model are only used for exemplary illustration and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood in combination with the embodiments and according to the specific circumstances.

[0024] Unless otherwise clearly specified and defined, in the present utility model, if there are terms such as "set", "connected" and "connected", they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0025] The preferred specific embodiments of the present utility model have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present utility model without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present utility model through logical analysis, reasoning, or limited experiments on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. A threaded rod, comprising a central rod, on the outer wall of the central rod there is arranged a trapezoidal thread, characterized in that: The central rod includes an outer tube body and an inner tube body arranged coaxially. The outer wall of the inner tube body is closely attached to the inner wall of the outer tube body. The trapezoidal thread is arranged on the outer wall of the outer tube body. A main oil guiding channel extending along the axis is provided on the outer tube body or the inner tube body between the outer tube body and the inner tube body. A lubricating groove extending along its extending track is provided at the top of the trapezoidal thread. A branch oil guiding channel with one end connected to the outside and the other end connected to the main oil guiding channel is provided at the bottom of the lubricating groove.

2. The threaded rod according to claim 1, characterized in that: The lubricating groove is provided at the center of the top of the trapezoidal thread.

3. The threaded rod according to claim 1 or 2, characterized in that: The number of the branch oil guiding channels is one, and the branch oil guiding channel is provided at the middle position of the central rod.

4. The threaded rod according to claim 3, characterized in that: The inner tube body and the outer tube body are in an interference fit relationship.

5. The threaded rod according to claim 1, characterized in that: The branch oil guiding channel extends along the radial direction of the central rod.

6. The threaded rod according to claim 1, characterized in that: The main oil guiding channel is provided on the outer tube body.

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