A positioning pin facilitating lubrication

Abstract

This utility model discloses a locating pin for easy lubrication, including an end and a shaft connected to one side of the end. The shaft includes a cavity laterally opened inside the shaft, an oil-slinging hole vertically opened at the top of the shaft and communicating with the cavity, and a sponge filling the cavity for storing lubricating oil. By incorporating a sponge, the lubricating oil can be absorbed by the sponge and quickly form an oil film on its outer surface when the shaft rotates, preventing it from being flung away by direct application. This makes shaft lubrication simple and convenient. Two adjustable clamps control the sponge's elongation, ensuring that the lubricating oil within the sponge always accumulates near the oil-slinging hole. When the shaft rotates, the lubricating oil is not dispersed and cannot be flung out, thus ensuring sufficient oil in the oil reservoir for easy shaft lubrication.

Description

Technical Field

[0001] This utility model specifically relates to a positioning pin that is easy to lubricate. Background Technology

[0002] A locating pin is a mechanical part that uses geometric fit to achieve precise positioning and fixation of components. It is usually composed of a cylindrical or conical shaft and an end, used to restrict the degrees of freedom of an object and ensure that multiple parts maintain accurate relative positions during assembly or processing. Depending on the usage, locating pins can be divided into fixed locating pins and rotatable locating pins. When using rotatable locating pins, the pins wear out more due to their long-term rotation inside the components. Workers usually apply lubricating oil to the locating pins to reduce friction and ensure their longevity.

[0003] Currently, there are two common lubrication methods for locating pins. One is to apply lubricating oil to the outside of the locating pin. However, the lubricating oil is easily splashed away as the locating pin rotates, which not only causes some waste but also requires frequent replenishment of lubricating oil, making lubrication inconvenient.

[0004] The second method involves injecting lubricating oil into the locating pin, so that the lubricating oil can be thrown to its outer surface through the oil slinger hole when the locating pin rotates. However, in practice, the lubricating oil inside the locating pin is not easily thrown out, which also makes lubrication of the locating pin inconvenient.

[0005] Therefore, it is necessary to invent a locating pin that is easy to lubricate in order to solve the above problems. Utility Model Content

[0006] (a) Purpose of the utility model

[0007] To address the technical problems existing in the background art, this utility model proposes a positioning pin that facilitates lubrication. By incorporating a sponge, lubricating oil can be absorbed by the sponge and quickly form an oil film on its outer side when the shaft rotates, preventing it from being flung away due to direct application, thus making shaft lubrication simple and convenient. Furthermore, by incorporating two adjustable clamps to control the elongation of the sponge, the lubricating oil inside the sponge can always be concentrated near the oil-throwing hole. When the shaft rotates, the lubricating oil will not be unable to be thrown out due to dispersion, thereby ensuring sufficient oil in the oil reservoir for easy lubrication of the shaft.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: a locating pin that is easy to lubricate, comprising an end head and a shaft body connected to one side of the end head, the shaft body comprising:

[0010] A cavity, wherein the cavity is laterally formed inside the shaft.

[0011] An oil slinger hole is vertically opened at the top of the shaft body, and the oil slinger hole is connected to the cavity;

[0012] A sponge, filling the interior of the cavity, is used to store lubricating oil;

[0013] Two clamps are disposed inside the cavity and are located at both ends of the sponge, respectively;

[0014] The adjustment component is horizontally positioned inside the shaft and is used to inject lubricating oil into the sponge. It can also adjust the distance between the two clamps so that the lubricating oil can be thrown out through the oil throwing hole.

[0015] Preferably, there are two oil-throwing holes, located on the left and right sides of the cavity, respectively.

[0016] Preferably, the sponge is a soft polyurethane foam.

[0017] Preferably, the adjustment assembly includes a dial plate disposed inside the end, and a rotating rod extending into the cavity is connected inside the dial plate. The rotating rod is threaded on the outer side of the cavity.

[0018] The adjustment assembly also includes two sliders, which are respectively connected to the top of two clamping plates. The inner wall of the shaft located at the slider has a groove extending along the length of the cavity, and the slider is disposed inside the groove.

[0019] Preferably, the rotating rod has an oil injection channel inside, and the rotating rod has an oil outlet at the outlet of the oil injection channel, with the oil outlet located at the center of the cavity.

[0020] Preferably, the thread is configured with two sections of thread, one in the positive direction and the other in the negative direction, with the oil outlet as the dividing line, and both clamps are connected to the rotating rod by threads.

[0021] Preferably, a sealing plug is connected to the outer side of the lever, a square groove is formed on the outer side of the lever, and a receiving groove for accommodating the sealing plug, the lever, and the rotating rod is formed inside the end.

[0022] Preferably, the top of the shaft is also provided with an oil storage groove, which is laterally distributed and connected to two oil throwing holes.

[0023] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are:

[0024] 1. This utility model creates a cavity inside the shaft, allowing the lubricating oil to be absorbed by the sponge within the cavity. When the shaft is in use, the lubricating oil can be splashed into the oil reservoir through the brush holes, directly acting on the connection between the shaft and external components. This allows an oil film to form quickly, providing lubrication and protection for the shaft. It also avoids the phenomenon where lubricating oil applied directly to the outside of the shaft is easily splashed away. Furthermore, the sponge can absorb enough lubricating oil to supply the shaft for long-term use without the need for frequent replenishment, making shaft lubrication simple and convenient.

[0025] 2. This utility model sets adjustable clamps at both ends of the sponge to control the sponge's expansion and contraction, so that the lubricating oil in the sponge can always be gathered near the oil throwing hole. When the shaft rotates, the lubricating oil can be quickly thrown into the oil storage tank, avoiding the phenomenon that the lubricating oil in the sponge cannot be thrown out due to dispersion. This ensures that there is enough oil in the oil storage tank, which is convenient for lubricating the shaft. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the connection structure between the rotating rod and the shaft of this utility model;

[0029] Figure 3 This is a half-sectional view of the present invention;

[0030] Figure 4 This is a schematic diagram of the connection structure between the rotating rod and the sponge in this utility model;

[0031] Figure 5 This is an exploded view of the sealing plug and the deflector of this utility model;

[0032] Figure 6 This is a schematic diagram of the connection structure between the rotating rod and the lever plate of this utility model;

[0033] Figure 7 This is a perspective view of the present utility model;

[0034] Figure 8 This is a perspective view of the present invention from another angle.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. End cap, 2. Shaft body, 3. Cavity, 4. Oil slinger hole, 5. Sponge, 6. Clamping plate;

[0037] 7 Adjustment component, 71 Dial plate, 72 Rotary rod, 73 Thread, 74 Slider, 75 Slide groove, 76 Oil injection channel, 77 Oil outlet hole;

[0038] 8. Sealing blockage, 9. Square channel, 10. Oil storage tank. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0040] This utility model provides, for example Figure 1-8 The illustrated locating pin for easy lubrication includes an end 1 and a shaft 2 connected to one side of the end 1. The shaft 2 includes:

[0041] Cavity 3, which is laterally formed inside the shaft 2.

[0042] An oil slinger hole 4 is vertically opened at the top of the shaft 2, and the oil slinger hole 4 is connected to the cavity 3;

[0043] Sponge 5, filling the interior of the cavity 3, is used to store lubricating oil;

[0044] Two clamping plates 6 are disposed inside the cavity 3 and are located at both ends of the sponge 5, respectively;

[0045] Adjustment component 7 is horizontally arranged inside the shaft 2, used to inject lubricating oil into the sponge 5, and can adjust the distance between the two clamps 6 so that the lubricating oil is thrown out through the oil throwing hole 4;

[0046] The adjustment assembly 7 includes a lever 71 disposed inside the end 1, and a rotating rod 72 extending into the cavity 3 is connected inside the lever 71. The rotating rod 72 is threaded 73 on the outer side of the cavity 3.

[0047] The adjustment assembly 7 also includes two sliders 74, which are respectively connected to the top of the two clamping plates 6. The inner wall of the shaft 2 located at the sliders 74 is provided with a groove 75 extending along the length of the cavity 3, and the sliders 74 are disposed inside the groove 75.

[0048] In one embodiment, there are two oil-throwing holes 4, located on the left and right sides of the cavity 3 respectively, so that the lubricating oil thrown out by the sponge 5 can quickly fill the oil storage tank 10, thereby quickly forming an oil film at the connection between the shaft 2 and the external components, and lubricating and protecting the shaft 2.

[0049] In one embodiment, the sponge 5 is a soft polyurethane foam. The open-cell soft polyurethane foam has a very high porosity and specific surface area, which can adsorb and store a large amount of lubricating oil through capillary action. This ensures that the lubricating oil stored in the cavity 3 is sufficient and can be used for a long time. It also has good resilience and can return to its original shape after the compression is released so that it can re-adsorb and store lubricating oil through capillary action.

[0050] In one embodiment, the rotating rod 72 has an oil injection channel 76 inside, and the rotating rod 72 has an oil outlet hole 77 at the outlet of the oil injection channel 76. The oil outlet hole 77 is located at the center of the cavity 3, so that lubricating oil can be injected into the cavity 3 and absorbed by the sponge 5.

[0051] In one embodiment, the thread 73 is configured with two sections of thread 73, one in the positive direction and the other in the negative direction, with the oil outlet 77 as the dividing line. Both clamping plates 6 are connected to the rotating rod 72 through the thread 73, so that the two clamping plates 6 can move away from each other or move closer to each other, thereby adjusting the distance between the two clamping plates 6. This allows the elongation of the sponge 5 to be freely controlled, so that the lubricating oil inside can be fully thrown out or flow out through the oil throwing hole 4.

[0052] In one embodiment, a sealing plug 8 is connected to the outside of the dial plate 71, and a square groove 9 is provided on the outer side of the dial plate 71 to facilitate the operator to rotate the dial plate 71. A receiving groove is provided inside the end 1 to accommodate the sealing plug 8, the dial plate 71, and the rotating rod 72.

[0053] In one embodiment, the top of the shaft 2 is also provided with an oil reservoir 10. The oil reservoir 10 is distributed laterally and is connected to two oil slinger holes 4, which can increase the contact area between the lubricating oil and the external connection, so that the oil film can be formed quickly to lubricate and protect the shaft 2.

[0054] The specific implementation method is as follows: Before installation, the operator first injects lubricating oil into the rotating rod 72 through the oil injection channel 76. When the lubricating oil flows to the oil outlet 77, it will spray out and be absorbed by the sponge 5. As the lubricating oil is continuously injected, the sponge 5 will absorb a sufficient amount of lubricating oil. Then, the operator screws the sealing plug 8 into the lever 71 to close the oil injection channel 76 and prevent the lubricating oil from leaking through the end 1. Finally, the positioning pin is directly installed in the external parts such as bearings, and it can be put into normal use.

[0055] When this utility model is in use, as the shaft 2 rotates continuously, the lubricating oil absorbed in the sponge 5 will be thrown out through the oil throwing hole 4 and then enter the oil storage tank 10. This increases the contact area between the shaft 2 and the external parts and the lubricating oil. The lubricating oil in the oil storage tank 10 will be thrown to the connection between the shaft 2 and the external parts under the rotation of the shaft 2, so that the connection is in full contact with the lubricating oil, quickly forming an oil film, improving the lubrication effect, and effectively reducing the wear of the shaft 2.

[0056] When the lubricating oil in the sponge 5 gradually decreases due to continuous ejection after prolonged use, the operator unscrews the sealing plug 8. Since the rotating rod 72 is rotatably connected to the end 1 and the shaft 2, the connection can be completed by bearings. Therefore, when the operator inserts a tool into the square channel 9 and rotates the dial plate 71 in the forward direction, the dial plate 71 will drive the rotating rod 72 to rotate in the forward direction around its own axis. At this time, under the limit of the slider 74, the two clamping plates 6 will move closer to each other along the length of the rotating rod 72, thereby shortening the distance between the two clamping plates 6. The clamping plates 6 can squeeze the sponge 5, reducing the volume of the sponge 5. Its internal pore space becomes smaller, and the absorbed lubricating oil will gather towards the middle section of the sponge 5, that is, towards the oil ejection hole 4. At this time, the lubricating oil can be squeezed out more easily, and when the shaft 2 rotates, it can continue to supply enough oil to the oil storage tank 10.

[0057] Furthermore, when it is necessary to re-inject lubricating oil into the sponge 5, simply rotate the lever 71 in the opposite direction to move the two clamping plates 6 away from each other, allowing the sponge 5 to regain its deformation. The setting of the slide groove 75 allows the movement displacement of the slider 74 to be controlled, thereby making the minimum distance between the two clamping plates 6 controllable, which can protect the sponge 5 and prevent it from being over-compressed. At the same time, in order to avoid excessive wear of the sponge 5 when it is squeezed, the outer diameter of the sponge 5 can be set to be smaller than the inner diameter of the cavity 3, so that the cavity 3 can reserve an expansion gap for the sponge 5 to contract.

[0058] This embodiment specifically addresses the two common lubrication methods for locating pins in the prior art. One method involves applying lubricating oil to the outside of the locating pin, which easily causes the lubricating oil to fly off as the locating pin rotates, resulting in waste and requiring frequent replenishment of lubricating oil, making lubrication inconvenient. The other method involves injecting lubricating oil into the locating pin, allowing the lubricating oil to be flung to its outer surface through the oil flinging hole 4 when the locating pin rotates. However, in this method, the lubricating oil inside the locating pin is not easily flung out, which also leads to the problem that lubrication of the locating pin is inconvenient.

[0059] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A positioning pin facilitating lubrication, comprising a head (1) and a shaft (2) connected to one side of the head (1), characterized in that: The shaft (2) includes: A cavity (3) is laterally formed inside the shaft (2). An oil-throwing hole (4) is vertically opened at the top of the shaft (2), and the oil-throwing hole (4) is connected to the cavity (3); A sponge (5) is used to fill the interior of the cavity (3) for storing lubricating oil; Two clamps (6) are set inside the cavity (3) and are located at both ends of the sponge (5); The adjusting component (7) is horizontally arranged inside the shaft (2) for injecting lubricating oil into the sponge (5) and adjusting the distance between the two clamps (6) so that the lubricating oil is thrown out through the oil throwing hole (4).

2. A self-lubricating dowel pin according to claim 1, wherein: There are two oil-throwing holes (4), located on the left and right sides of the cavity (3).

3. A self-lubricating dowel pin according to claim 1, wherein: The sponge (5) is configured as a soft polyurethane foam.

4. A lubrication facilitating dowel pin according to claim 1, wherein: The adjustment assembly (7) includes a dial plate (71) disposed inside the end (1), and a rotating rod (72) extending into the cavity (3) is connected inside the dial plate (71). The rotating rod (72) is threaded (73) on the outer side of the cavity (3). The adjustment assembly (7) also includes two sliders (74), which are respectively connected to the top of the two clamps (6). The inner wall of the shaft (2) located at the slider (74) has a groove (75) extending along the length direction of the cavity (3), and the slider (74) is located inside the groove (75).

5. A self-lubricating dowel pin according to claim 4, wherein: The rotating rod (72) has an oil injection channel (76) inside, and the rotating rod (72) has an oil outlet hole (77) at the outlet of the oil injection channel (76), and the oil outlet hole (77) is located at the center of the cavity (3).

6. A lubrication facilitating dowel pin according to claim 5, wherein: The thread (73) is set as two sections of thread (73) with the oil outlet (77) as the dividing line. Both of the clamps (6) are connected to the rotating rod (72) through the thread (73).

7. A lubrication facilitating dowel pin according to claim 4, wherein: The outer side of the lever (71) is connected to a sealing plug (8), and a square groove (9) is opened on the outer side of the lever (71). The inner side of the end (1) is provided with a receiving groove for accommodating the sealing plug (8), the lever (71), and the rotating rod (72).

8. A lubrication facilitating dowel pin according to claim 1, wherein: The top of the shaft (2) is also provided with an oil storage tank (10), which is distributed laterally and connected to two oil throwing holes (4).

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