A transmission mechanism for a needle-type guide post assembly

Abstract

The utility model discloses a transmission mechanism of needle type guide pillar subassembly relates to mechanical engineering technical field. Including: guide pillar subassembly, the outer wall fixedly connected with needle row structure on the upper portion of guide pillar subassembly, the outer wall slidingly connected with bush assembly of needle row structure, bush assembly includes slide cover, the inside of slide cover is provided with oil injection pipe, the inside of slide cover is provided with annular pipeline with the through connection of oil injection pipe, the inner wall of slide cover is provided with the oil outlet with the through of oil injection pipe, the outer wall of slide cover below oil outlet is provided with the oil outlet with the through connection of oil injection pipe, and the sliding friction between slide cover and needle row structure is converted into rolling friction through needle, and the lubrication circulation that cooperation oil injection pipe, annular pipeline, oil outlet and oil outlet constitute can reduce the wear and tear of part, and guarantee transmission process stable and smooth.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering technology, specifically to a transmission mechanism for a needle roller guide post assembly. Background Technology

[0002] Most traditional guide post transmission mechanisms on the market use a pure sliding fit or a simple needle roller arrangement structure. The sliding fit has a high coefficient of friction, and after long-term operation, severe wear is likely to occur between the guide post and the bushing, resulting in an increase in the guide clearance and a rapid decrease in transmission accuracy. Utility Model Content

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a transmission mechanism for a needle roller guide post assembly, which solves the problem of insufficient lubrication.

[0004] (II) Technical Solution To solve the above problems, this utility model achieves this through the following technical solution: a transmission mechanism for a needle roller guide post assembly, comprising: a guide post assembly, wherein a needle roller row structure is fixedly connected to the outer wall of the guide post assembly, and a bushing assembly is slidably connected to the outer wall of the needle roller row structure; the bushing assembly includes a sliding sleeve, wherein an oil injection pipe is provided inside the sliding sleeve, an annular pipe communicating with the oil injection pipe is provided inside the sliding sleeve, an oil outlet communicating with the oil injection pipe is provided on the inner wall of the sliding sleeve, and an oil drain port communicating with the oil injection pipe is provided on the outer wall of the sliding sleeve below the oil outlet. Through the cooperation of the oil injection pipe, the annular pipe and the oil outlet, the lubricant can be evenly covered on the friction contact surface, reducing frictional loss between components. At the same time, the oil drain port can discharge aged lubricant in a timely manner, avoiding component corrosion caused by the accumulation of impurities, reducing maintenance difficulty and frequency. In addition, the sliding cooperation between the needle roller row structure and the bushing assembly can also improve the smoothness of the transmission process, reduce jamming, and ensure the stable operation of the transmission mechanism.

[0005] Preferably, the guide post assembly includes a base, a guide post fixedly connected to the outer wall above the base, a blocking ring fixedly connected to the outer wall of the guide post, a compensating spring fixedly connected to the outer wall above the blocking ring, a thrust spring fixedly connected to the inner wall of the guide post at the end away from the base, a locking pin fixedly connected to the outer wall of the thrust spring, and a handle fixedly connected to the outer wall above the locking pin. The base provides a stable installation foundation for the entire transmission mechanism, avoiding transmission deviations caused by unstable foundations during operation. The guide post, as a core guiding component, ensures the installation and transmission of each component. The blocking ring limits the movement range of the components and prevents misalignment. The compensating spring can adaptively adjust through elastic deformation when there are slight deviations in the equipment assembly or vibrations during operation, reducing jamming and improving transmission stability. The cooperation between the thrust spring and the locking pin, combined with the easy-to-operate handle, makes the locking action more convenient, eliminating the need for complex external fasteners, reducing the difficulty of operation, and improving the reliability of locking, preventing loosening during operation.

[0006] Preferably, the compensating spring is sleeved on the outer wall of the guide post, the outer wall of the locking pin is slidably connected to the inner wall of the guide post, and the handle is located on the outer wall above the guide post. The compensating spring sleeved on the outer wall of the guide post avoids deformation or displacement caused by uneven spring force, extends the service life of the compensating spring, and ensures the stability of elastic compensation, ensuring that it can play a compensating role when deviation occurs. The sliding connection between the locking pin and the inner wall of the guide post ensures the smooth operation of the locking pin, avoids locking failure caused by jamming, and improves the reliability of the locking function. The handle is located on the outer wall above the guide post, which conforms to human operating habits. Operators can complete the locking operation without bending over or using tools, reducing the difficulty of operation and improving the efficiency of assembly and maintenance.

[0007] Preferably, the needle roller array structure includes an array body, with needle rollers rotatably connected to the inner wall of the array body. The inner wall of the array body fits against the outer wall of the guide post, and the outer wall of the needle rollers is rotatably connected to the outer wall of the sliding sleeve. The inner wall of the array body is inserted into the outer wall of the locking pin. The tight fit between the array body and the guide post in the needle roller array structure ensures the installation of the needle roller array structure and avoids transmission errors caused by installation deviations. The needle rollers convert the sliding friction between the sliding sleeve and the needle roller array structure into rolling friction, reducing the coefficient of friction, reducing wear between components, and extending the service life of the transmission mechanism. At the same time, the flexible rotation of the needle rollers improves the smoothness of the sliding sleeve movement, avoids jamming, and ensures transmission. The insertion and engagement of the array body and the locking pin makes the fixation of the needle roller array structure and the guide post more reliable, preventing displacement of the needle roller array structure during operation and further improving the overall stability of the transmission mechanism.

[0008] (III) Beneficial Effects This utility model provides a transmission mechanism for a needle roller guide post assembly. It has the following advantages: (i) The transmission mechanism of the needle roller guide post assembly converts the sliding friction between the sliding sleeve and the needle roller row structure into rolling friction through the needle rollers. Combined with the lubrication circulation formed by the oil injection pipe, the annular pipe, the oil outlet and the oil drain, it can reduce component wear and ensure stable and smooth transmission process.

[0009] (ii) The transmission mechanism of this needle roller guide post assembly, by combining the adaptive adjustment of the compensating spring for slight deviations and the reliable fixing of the needle roller row structure by the locking pin and the thrust spring, can improve the adaptability of the mechanism to installation deviations and ensure the reliable operation of the overall structure. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This utility model Figure 2 Schematic diagram of the structure at point A; Figure 4 This is a structural schematic diagram of the cross-section of the bushing assembly of this utility model.

[0011] In the diagram: 1. Guide post assembly; 11. Base; 12. Blocking ring; 13. Compensating spring; 14. Guide post; 15. Thrust spring; 16. Handle; 17. Locking pin; 2. Needle roller row structure; 21. Row body; 22. Needle roller; 3. Bushing assembly; 31. Sliding sleeve; 32. Oil injection pipe; 33. Annular pipe; 34. Oil drain port; 35. Oil outlet. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] Please see Figure 1-4This utility model provides a transmission mechanism technical solution for a needle roller guide post assembly, including: a guide post assembly 1, a needle roller row structure 2 fixedly connected to the outer wall of the guide post assembly 1, and a bushing assembly 3 slidably connected to the outer wall of the needle roller row structure 2; the bushing assembly 3 includes a sliding sleeve 31, an oil injection pipe 32 is opened inside the sliding sleeve 31, an annular pipe 33 is opened inside the sliding sleeve 31 and communicates with the oil injection pipe 32, an oil outlet 35 is opened on the inner wall of the sliding sleeve 31 and communicates with the oil injection pipe 32, and an oil drain port 34 is opened on the outer wall of the sliding sleeve 31 below the oil outlet 35 and communicates with the oil injection pipe 32.

[0014] The guide post assembly 1 includes a base 11, a guide post 14 is fixedly connected to the outer wall above the base 11, a blocking ring 12 is fixedly connected to the outer wall of the guide post 14, a compensating spring 13 is fixedly connected to the outer wall above the blocking ring 12, a thrust spring 15 is fixedly connected to the inner wall of the end of the guide post 14 away from the base 11, a locking pin 17 is fixedly connected to the outer wall of the thrust spring 15, and a handle 16 is fixedly connected to the outer wall above the locking pin 17.

[0015] The compensating spring 13 is sleeved on the outer wall of the guide post 14, the outer wall of the locking pin 17 is slidably connected to the inner wall of the guide post 14, and the handle 16 is located on the outer wall above the guide post 14.

[0016] The needle roller structure 2 includes a row body 21, with a needle roller 22 rotatably connected to the inner wall of the row body 21. The inner wall of the row body 21 is in contact with the outer wall of the guide post 14. The outer wall of the needle roller 22 is rotatably connected to the outer wall of the sliding sleeve 31. The inner wall of the row body 21 is inserted into the outer wall of the locking pin 17.

[0017] In use, the transmission mechanism of the needle roller guide post assembly takes the guide post assembly 1 as the core reference. First, the entire mechanism is stably installed in the designated position of the equipment through the base 11. The base 11 provides a stable support foundation for all subsequent components, avoiding transmission deviation caused by the shaking of the foundation during the operation of the mechanism. The guide post 14 is vertically fixed to the outer wall above the base 11, serving as the installation guide reference for the needle roller row structure 2 and the bushing assembly 3, ensuring that each component is distributed along the preset axis.

[0018] During the installation stage of the needle roller structure 2, the roller body 21 equipped with needle rollers 22 is fitted onto the outer wall of the guide post 14, so that the inner wall of the roller body 21 fits tightly with the outer wall of the guide post 14 to ensure installation. At this time, by operating the handle 16, the locking pin 17 is driven to compress the thrust spring 15 on the inner wall of the guide post 14. After the hole on the inner wall of the roller body 21 is aligned with the locking pin 17, the handle 16 is released, and the thrust spring 15 releases its elastic force to push the locking pin 17 out and engage with the inner wall of the roller body 21, thus completing the fixation of the needle roller structure 2 on the guide post 14. At the same time, the blocking ring 12 on the outer wall of the guide post 14 limits the roller body 21 and the components above it, preventing the components from moving down excessively in subsequent transmission.

[0019] The core transmission function of the transmission mechanism is achieved through the cooperation between the bushing assembly 3 and the needle roller row structure 2. The sliding sleeve 31 of the bushing assembly 3 is sleeved on the outside of the needle roller row structure 2. When the equipment drives the sliding sleeve 31 to move axially along the guide column 14, the inner wall of the sliding sleeve 31 contacts the outer wall of the needle roller 22 in the row body 21 of the needle roller row structure 2. Since the needle roller 22 can rotate flexibly around its own axis, the sliding of the sliding sleeve 31 will drive the needle roller 22 to rotate synchronously, converting the sliding friction between the sliding sleeve 31 and the needle roller row structure 2 into the rolling friction of the needle roller 22, reducing the frictional resistance, and making the sliding sleeve 31 move stably and smoothly along the outer wall of the needle roller row structure 2, thereby realizing the guiding transmission function of the mechanism.

[0020] To ensure lubrication of the friction surfaces during transmission, the mechanism utilizes the lubrication structure of the bushing assembly 3 to achieve the circulation and renewal of lubricant. When lubrication is required, lubricant is injected through the oil injection pipe 32 inside the sleeve 31. The lubricant flows along the oil injection pipe 32 into the annular pipe 33 that is connected to it. The annular pipe 33 surrounds the inside of the sleeve 31, which can evenly disperse the lubricant to different areas of the inner wall of the sleeve 31. Subsequently, the lubricant penetrates into the friction contact surface between the sleeve 31 and the needle roller 22 through the oil outlet 35 that connects the inner wall of the sleeve 31 and the oil injection pipe 32, forming a lubricating film on the friction surface and reducing the wear of the needle roller 22 and the sleeve 31. The aged lubricant produced after use will be discharged from the outside of the sleeve 31 along the oil outlet 34 located below the oil outlet 35 on the outer wall of the sleeve 31 under the push of the newly injected lubricant and its own gravity, completing the circulation and renewal of the lubricant and preventing the accumulation of aged lubricant mixed with impurities on the friction surface, which would cause corrosion.

[0021] During the operation of the mechanism, if there is a slight deviation in the equipment assembly or vibration during operation, the compensation spring 13 sleeved on the outer wall of the guide column 14 will adaptively adjust through elastic deformation. When the sliding sleeve 31 moves or external vibration causes a small displacement of the component, the compensation spring 13 can absorb the deviation through extension and contraction, avoiding jamming between components due to hard contact, and ensuring the stability of the sliding sleeve 31 in the transmission along the needle roller structure 2. At the same time, the insertion and engagement of the locking pin 17 and the thrust spring 15 always maintains the fixed relationship between the row body 21 and the guide column 14, preventing the needle roller structure 2 from shifting during transmission, and further ensuring the operation and reliability of the entire transmission mechanism.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transmission mechanism for a needle roller guide post assembly, characterized in that, include: A guide post assembly (1) is fixedly connected to the outer wall of the guide post assembly (1), and a bushing assembly (3) is slidably connected to the outer wall of the needle roller assembly (2). The bushing assembly (3) includes a sliding sleeve (31), an oil injection pipe (32) is provided inside the sliding sleeve (31), an annular pipe (33) is provided inside the sliding sleeve (31) and is connected to the oil injection pipe (32), an oil outlet (35) is provided on the inner wall of the sliding sleeve (31) and is connected to the oil injection pipe (32), and an oil drain port (34) is provided on the outer wall of the sliding sleeve (31) below the oil outlet (35) and is connected to the oil injection pipe (32).

2. The transmission mechanism of the needle roller guide post assembly according to claim 1, characterized in that: The guide post assembly (1) includes a base (11), a guide post (14) is fixedly connected to the outer wall above the base (11), a blocking ring (12) is fixedly connected to the outer wall of the guide post (14), a compensation spring (13) is fixedly connected to the outer wall above the blocking ring (12), a thrust spring (15) is fixedly connected to the inner wall of the guide post (14) away from the base (11), a locking pin (17) is fixedly connected to the outer wall of the thrust spring (15), and a handle (16) is fixedly connected to the outer wall above the locking pin (17).

3. The transmission mechanism of the needle roller guide post assembly according to claim 2, characterized in that: The compensation spring (13) is sleeved on the outer wall of the guide post (14), the outer wall of the locking pin (17) is slidably connected to the inner wall of the guide post (14), and the handle (16) is located on the outer wall above the guide post (14).

4. The transmission mechanism of the needle roller guide post assembly according to claim 1, characterized in that: The needle roller structure (2) includes a roller body (21), with a needle roller (22) rotatably connected to the inner wall of the roller body (21). The inner wall of the roller body (21) is in contact with the outer wall of the guide post (14), and the outer wall of the needle roller (22) is rotatably connected to the outer wall of the sliding sleeve (31). The inner wall of the roller body (21) is inserted into the outer wall of the locking pin (17).

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