Oil injection type hinge pin

Abstract

The utility model discloses an oil injection type hinge pin which comprises a pin shaft and a limiting piece. The pin shaft is of a columnar structure and is inserted into the mounting hole of the structural part, and a gap is formed between the pin shaft and the inner wall of the mounting hole; an oil injection nozzle is installed at the end of the pin shaft, and an oil inlet channel is formed in the pin shaft and communicated with the oil injection nozzle and the gap. The limiting piece is installed on the side wall of the structural piece and located at the end of the installation hole, and the limiting piece is used for limiting axial movement of the pin shaft along the installation hole. According to the arrangement, the oil injection nozzle is arranged at the end of the pin shaft, and meanwhile, the oil inlet channel is formed in the pin shaft, so that lubricating oil can be injected into a gap between the pin shaft and the mounting hole of the structural part through the oil injection nozzle, the friction force between the pin shaft and the structural part can be reduced, and abrasion and corrosion between the pin shaft and the structural part are reduced; therefore, the service lives of the pin shaft and the structural member are prolonged; meanwhile, limiting pieces are arranged at the positions, located at the ends of the pin shafts, of the two side walls of the structural piece, so that the pin shafts can be prevented from moving outwards.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic support, especially relates to an oil injection type hinged pin. BACKGROUND

[0002] The conventional design hydraulic support hinged pin has no lubrication between the hinged pin and structural member, the gap cannot be designed to be small, the friction force borne by the support pin shaft is large during use, the pin shaft and structural member are seriously abraded, the coal dust enters the gap under the influence of the downhole environment, and the service life of the hydraulic support is shortened under the joint action of the water and pin shaft and structural member, the hydraulic support cannot be removed during overhaul and can only be destructively removed.

[0003] Therefore, how to provide a pin shaft structure that can be lubricated is a technical problem that needs to be solved by those skilled in the art. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a hinged pin that can be lubricated to reduce the friction between the hinged pin and structural member.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] An oil injection type hinged pin comprises:

[0007] The pin shaft is in a columnar structure, is inserted into the mounting hole of the structural member, and has a gap with the inner wall of the mounting hole; an oil injection nozzle is mounted at the end of the pin shaft, an oil inlet channel is formed in the pin shaft, and the oil inlet channel is communicated with the oil injection nozzle and the gap;

[0008] The limiting piece is mounted to the side wall of the structural member and is located at the end of the mounting hole, and the limiting piece is used to limit the axial movement of the pin shaft along the mounting hole.

[0009] Preferably, the oil inlet channel comprises an axial channel, a first radial channel and a second radial channel, the axial channel extends along the pin shaft axis, the first radial channel and the second radial channel extend radially along the pin shaft, and both are communicated with the axial channel, and the first radial channel and the second radial channel are communicated with the gap between the pin shaft and the mounting hole.

[0010] Preferably, the side wall of the mounting hole is provided with an annular oil storage groove communicated with the first radial channel and the second radial channel.

[0011] Preferably, the end of the axial channel where the oil injection nozzle is mounted is provided with a counterbore to accommodate the oil injection nozzle.

[0012] Preferably, the oil inlet channel comprises two first radial channels and two second radial channels, the first radial channels and the axial channel are perpendicular to each other, and the second radial channels and the axial channel are perpendicular to each other.

[0013] Preferably, the oil injection nozzle is a one-way valve.

[0014] Preferably, the limiting member comprises a first limiting plate, a second limiting plate, and a baffle plate, the first limiting plate and the second limiting plate are fixedly installed on the side wall of the structural member, and a clamping channel is formed between the first limiting plate, the second limiting plate, and the side wall of the structural member, the baffle plate is arranged in the clamping channel, and the baffle plate is used for preventing the pin shaft from moving axially outward.

[0015] Preferably, an end portion of the baffle plate close to the first limiting plate is provided with a stop portion, and the stop portion is used for limiting the movement of the baffle plate towards the second limiting plate.

[0016] A pair of stop pin mounting seats are arranged on a side of the first limiting plate away from the second limiting plate, a stop pin is arranged between the stop pin mounting seats, and the stop pin is used for limiting the movement of the baffle plate away from the second limiting plate.

[0017] Preferably, a through hole is arranged in the baffle plate at a position corresponding to the oil injection nozzle.

[0018] Preferably, a detachable latch is arranged at each end portion of the baffle plate, so as to prevent the baffle plate from being separated from the first limiting plate and the second limiting plate.

[0019] With respect to the background art, the oil injection type hinge pin provided by the present application comprises a pin shaft and a limiting member, the pin shaft is in a columnar structure, is inserted into a mounting hole of a structural member, and has a gap with an inner wall of the mounting hole, an oil injection nozzle is arranged at an end portion of the pin shaft, an oil inlet channel is arranged in the pin shaft, the oil inlet channel is connected with the oil injection nozzle and the gap, and the limiting member is arranged on a side wall of the structural member and at an end portion of the mounting hole, and is used for limiting the axial movement of the pin shaft along the mounting hole.

[0020] Specifically, the end portion of the pin shaft in the embodiment is provided with the oil injection nozzle, and the oil inlet channel is arranged in the pin shaft, so that lubricating oil can be injected into the gap between the pin shaft and the mounting hole of the structural member through the oil injection nozzle, the friction between the pin shaft and the structural member is reduced, the wear between the pin shaft and the structural member is reduced, and the service life of the pin shaft is prolonged; in order to prevent the pin shaft from moving outward, the limiting member is arranged at the end portion of the pin shaft on the two side walls of the structural member, and the limiting member is arranged at the end portion of the mounting hole, so as to limit the outward movement of the pin shaft. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0022] Figure 1 The oil injection type hinge pin structure provided by the embodiment of the present application is shown in the figure.

[0023] Figure 2 The oil injection type hinge pin structure provided by the embodiment of the present application is shown in the figure. Figure 1 The A-A structure section view is shown in the figure.

[0024] Figure 3 The oil injection type hinge pin structure provided by the embodiment of the present application is shown in the figure. Figure 2 The structure enlarged view is shown in the figure.

[0025] Figure 4 The annular oil storage groove structure enlarged view provided by the embodiment of the present application is shown in the figure.

[0026] Figure 5 The pin shaft structure schematic view provided by the embodiment of the present application is shown in the figure.

[0027] Figure 6 The first limiting plate structure schematic view provided by the embodiment of the present application is shown in the figure.

[0028] Figure 7 The second limiting plate structure schematic view provided by the embodiment of the present application is shown in the figure.

[0029] Figure 8 The pin shaft another angle structure schematic view provided by the embodiment of the present application is shown in the figure.

[0030] Figure 9 The baffle structure schematic view provided by the embodiment of the present application is shown in the figure.

[0031] Among them:

[0032] 100-pin shaft, 110-oil injection nozzle, 120-axial channel, 130-first radial channel, 140-second radial channel, 150-counterbore;

[0033] 200-structural member, 210-mounting hole, 220-annular oil storage groove;

[0034] 310-first limiting plate, 311-stop pin mounting seat, 312-stop pin, 320-second limiting plate, 330-baffle, 331-stop portion. DETAILED DESCRIPTION

[0035] Clearly and completely describe the technical scheme in the embodiments of the utility model with the drawings in the embodiments of the utility model below, obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0036] In order to make the person skilled in the art better understand the utility model scheme, the utility model is further described in detail below in combination with the drawings and specific embodiments.

[0037] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "left" and "right" is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated position or element must have a specific orientation, constitute and operate in a specific orientation, therefore, it cannot be understood as the limitation of the utility model.

[0038] The utility model aims at providing a hinge pin capable of lubrication to reduce the friction between the hinge pin and the structural member.

[0039] To achieve the above object, the utility model provides the following technical scheme:

[0040] Please refer to Figures 1 to 9 The embodiment provides an oil injection type hinge pin, which comprises a pin shaft 100 and a limiting piece, the pin shaft 100 is in a columnar structure, is inserted into a mounting hole 210 of a structural member 200, and has a gap with the inner wall of the mounting hole 210, an oil injection nozzle 110 is installed at the end of the pin shaft 100, an oil inlet channel is formed in the pin shaft 100, the oil inlet channel is communicated with the oil injection nozzle 110 and the gap, the limiting piece is installed to the side wall of the structural member 200 and is located at the end of the mounting hole 210, and the limiting piece is used for limiting the axial movement of the pin shaft 100 along the mounting hole 210.

[0041] Specifically, the pin shaft 100 in the embodiment is installed in the mounting hole 210 of the structural member 200, and there is a small gap between the two, so that the pin shaft 100 can rotate normally in the mounting hole 210, but because the pin shaft 100 will rub against the inner wall of the mounting hole 210 when rotating, an oil injection nozzle 110 is arranged at the end of the pin shaft 100, and an oil inlet channel is also arranged in the pin shaft 100, so that lubricating oil can be injected into the gap between the pin shaft 100 and the mounting hole 210 of the structural member 200 through the oil injection nozzle 110, thereby reducing the friction between the pin shaft 100 and the structural member 200, and further reducing the wear between the two, thereby prolonging the service life of the pin shaft 100; in order to prevent the pin shaft 100 from moving outward, a limiting piece is also arranged at the position of the two side walls of the structural member 200 at the end of the pin shaft 100, and the limiting piece is located at the end of the mounting hole 210, thereby limiting the outward movement of the pin shaft 100.

[0042] As preferred, the oil inlet channel includes an axial channel 120, a first radial channel 130 and a second radial channel 140, the axial channel 120 extends along the axis of the pin shaft 100, the first radial channel 130 and the second radial channel 140 extend radially along the pin shaft 100, and both communicate with the axial channel 120, and the first radial channel 130 and the second radial channel 140 communicate to the gap between the pin shaft 100 and the mounting hole 210.

[0043] Specifically as shown in Figure 2 and Figure 3 The oil inlet channel includes an axial channel 120 arranged axially along the pin shaft 100, and a first radial channel 130 and a second radial channel 140 arranged radially along the pin shaft 100, wherein because the structural member 200 and the pin shaft 100 in the embodiment have two contact surfaces, the first radial channel 130 and the second radial channel 140 are arranged at different radial positions of the pin shaft 100 in the embodiment; in this way, when lubricating oil is added to the oil injection nozzle 110, the lubricating oil will advance along the axial channel 120, and then enter the first radial channel 130 and the second radial channel 140 respectively, and then enter the gap between the pin shaft 100 and the inner wall of the mounting hole 210 to play a lubricating role.

[0044] It can be understood that when the structural member 200 and the pin shaft 100 have multiple contact surfaces or the contact surface area is too large, multiple radial channels communicating with the axial channel 120 can be arranged at appropriate positions of the pin shaft 100, which can improve the lubrication effect between the pin shaft 100 and the mounting hole 210.

[0045] As preferred, the side wall of the mounting hole 210 is provided with an annular oil storage groove 220 communicating with the first radial channel 130 and the second radial channel 140.

[0046] Further, in order to keep the lubricating effect between the pin shaft 100 and the mounting hole 210 for a long time, an annular oil storage groove 220 is arranged at the position where the inner wall of the mounting hole 210 communicates with the first radial channel 130 and the second radial channel 140, as shown in Figure 4 ; in this way, when oil is injected into the pin shaft 100, more lubricating oil can be injected at one time, and the excess lubricating oil can be temporarily stored in the annular oil storage groove 220, so that when the pin shaft 100 rotates for a long time, oil can be continuously drawn from the annular oil storage groove 220, thereby avoiding the need for multiple oil injections at short intervals, and improving the convenience of using the hinge pin when injecting oil.

[0047] As a preferred, the end of the axial channel 120 where the oil injection nozzle 110 is installed is provided with a counterbore 150 to accommodate the oil injection nozzle 110.

[0048] As shown in Figure 3 , the axial channel 120 in the embodiment is arranged at the axis of the pin shaft 100, that is, the axial channel 120 coincides with the axis of the pin shaft 100, in order to hide the oil injection nozzle 110, that is, not to protrude, a counterbore 150 is arranged at the end of the axial channel 120, and the oil injection nozzle 110 is installed in the counterbore 150, so that the oil injection nozzle 110 can be well protected from being damaged; at the same time, the counterbore 150 can receive oil that accidentally drips during oil injection.

[0049] As a preferred, the oil inlet channel includes two first radial channels 130 and two second radial channels 140, the two first radial channels 130 and the axial channel 120 are perpendicular to each other, and the two second radial channels 140 and the axial channel 120 are perpendicular to each other.

[0050] As shown in Figure 5 , in order to increase the oil injection efficiency and to enable the lubricating oil to be uniformly injected into the gap between the pin shaft 100 and the inner wall of the mounting hole 210, the first radial channel 130 and the two second radial channels 140 are each provided with two, and are arranged in a cross shape.

[0051] Of course, the number and distribution of the first radial channel 130 and the two second radial channels 140 can also be appropriately adjusted according to actual conditions, which is not limited in this article.

[0052] As a preferred, the oil injection nozzle 110 is a one-way valve.

[0053] In the embodiment, the oil injection nozzle 110 is preferably a one-way valve, that is, when oil injection is needed, the oil injection pipe is inserted into the oil injection nozzle 110, at this time, the oil can flow to the oil inlet channel, but after the oil injection pipe is pulled out, the oil cannot flow out of the oil injection nozzle 110; in this way, the convenience of oil injection can be improved and oil leakage can be prevented.

[0054] Preferably, the limiting member comprises a first limiting plate 310, a second limiting plate 320, and a blocking plate 330. The first limiting plate 310 and the second limiting plate 320 are fixedly installed on the side wall of the structural member 200 and form a clamping channel with the side wall of the structural member 200. The blocking plate 330 is arranged in the clamping channel and is used to prevent the shaft 100 from moving axially outward.

[0055] Specifically, as shown in Figure 1 , Figure 6 and Figure 7 , the limiting member comprises a first limiting plate 310 and a second limiting plate 320 arranged oppositely. The first limiting plate 310 and the second limiting plate 320 are arranged on both sides of the mounting hole 210, and the line connecting the centers of the first limiting plate 310 and the second limiting plate 320 passes through the axis of the mounting hole 210. The inner side of the first limiting plate 310 and the second limiting plate 320, that is, the side close to the structural member 200, is provided with a groove. When the first limiting plate 310 and the second limiting plate 320 are installed, the groove and the side wall of the structural member 200 jointly form a clamping channel. The blocking plate 330 can be directly inserted into the clamping channel, so that the blocking plate 330 can prevent the shaft from moving outward. In order to prevent the blocking plate 330 from being separated from the clamping channel, a blocking pin 312 is installed on the limiting member. In the embodiment, the installation position of the limiting member can be adjusted according to different diameters of the mounting hole 210, and the blocking plate 330 with different lengths can be selected to limit the shaft of different diameters in the axial direction.

[0056] Preferably, the end of the blocking plate 330 close to the first limiting plate 310 is provided with a stop portion 331 for limiting the movement of the blocking plate 330 toward the second limiting plate 320. The side of the first limiting plate 310 away from the second limiting plate 320 is provided with a pair of blocking pin mounting seats 311, and the blocking pin 312 is arranged between the two blocking pin mounting seats 311. The blocking pin 312 is used to limit the movement of the blocking plate 330 away from the second limiting plate 320.

[0057] One side of the blocking plate 330 is provided with a stop portion 331 in a square structure. As shown in Figure 9 , the overall size of the stop portion 331 is greater than the interface size of the clamping channel, so that the movement of the blocking plate 330 through the clamping channel in the direction away from the stop portion 331 is limited. In the embodiment, the end provided with the stop portion 331 is close to the first limiting plate 310.

[0058] Further, in order to prevent the baffle 330 from being disengaged from the clamping channel towards the direction where the stop portion 331 is arranged, a pair of baffle pin mounting seats 311 are arranged on the outer side of the first limiting plate 310. The stop portion 331 of the baffle 330 is located between the two baffle pin mounting seats 311 after being inserted. The baffle pin mounting seats 311 are provided with through holes for the baffle pin 312. After the baffle pin 312 is inserted, the baffle 330 cannot be disengaged from the outside. In this way, the baffle 330 can be fixed, and the baffle 330 can stably play a role.

[0059] In the embodiment, one end of the baffle 330 is provided with the stop portion 331, and the other end is of a normal size. The baffle 330 is fixed by cooperating with the baffle pin mounting seat 311 and the baffle pin 312 arranged on one of the limiting plates. In this way, the universality of the baffle 330 can be maximized. That is, the baffle 330 can be applied to the mounting hole 210 with a smaller diameter than the length of the baffle 330. Therefore, different lengths of the baffle 330 do not need to be replaced according to the hole diameter, and the universality of the limiting piece is further improved.

[0060] Preferably, the baffle 330 is provided with a through hole corresponding to the position of the oil injection nozzle 110.

[0061] Further, in order to prevent the baffle 330 from affecting the use of the oil injection nozzle 110, a through hole is further arranged at the position corresponding to the oil injection nozzle 110. The hole diameter of the through hole is slightly larger than the hole diameter of the counterbore 150. In this way, the baffle 330 does not need to be disassembled every time the lubricating oil is injected into the oil injection nozzle 110. This arrangement can greatly improve the convenience of oil injection.

[0062] Preferably, the two ends of the baffle 330 are provided with detachable latches to prevent the baffle 330 from being disengaged from the first limiting plate 310 and the second limiting plate 320.

[0063] In addition, in order to prevent the baffle pin 312 from moving away from the baffle pin mounting seat 311, pin holes can be arranged at both ends of the shaft 100, and a latch is arranged therein. When the baffle 330 needs to be removed, the latch is first removed, and then the baffle pin 312 can be pulled out, and the baffle 330 can be conveniently pulled out.

[0064] It should be noted that in the present specification, relational terms such as first and second are used only to differentiate one entity from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities.

[0065] The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be mutually referred to.

[0066] The above has carried out the detailed introduction to the embodiment provided by the utility model. The principle and implementation mode of the utility model have been described in this paper by applying specific examples, and the above embodiment is only used for helping understanding the method and its core idea of the utility model. It should be pointed out that for ordinary skilled person in the art, without departing from the principle of the utility model, the utility model can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the utility model.

Claims

1. An oil-impregnated hinge pin, characterized in that, The application relates to a pin shaft (100) which is inserted into a mounting hole (210) of a structure (200) and has a gap with the inner wall of the mounting hole (210), an oil injection nozzle (110) is arranged at the end of the pin shaft (100), an oil inlet channel is arranged in the pin shaft (100), and the oil inlet channel is communicated with the oil injection nozzle (110) and the gap. A limiting part is arranged on the side wall of the structure (200) and located at the end of the mounting hole (210), and the limiting part is used for limiting the axial movement of the pin shaft (100) along the mounting hole (210). The oil inlet channel comprises an axial channel (120), a first radial channel (130) and a second radial channel (140), the axial channel (120) extends along the axis of the pin shaft (100), the first radial channel (130) and the second radial channel (140) extend along the radial direction of the pin shaft (100) and are communicated with the axial channel (120), and the first radial channel (130) and the second radial channel (140) are communicated with the gap between the pin shaft (100) and the mounting hole (210).

2. The oil-impregnated hinged pin of claim 1, wherein, An annular oil storage groove (220) is arranged on the side wall of the mounting hole (210) and communicated with the first radial channel (130) and the second radial channel (140).

3. The oil-impregnated hinged pin of claim 2, wherein, The end of the axial channel (120) where the oil injection nozzle (110) is arranged is provided with a counterbore (150) for accommodating the oil injection nozzle (110).

4. The oil-impregnated hinged pin of claim 3, wherein, The oil inlet channel comprises two first radial channels (130) and two second radial channels (140), the three first radial channels (130) and the axial channel (120) are perpendicular to each other, and the three second radial channels (140) and the axial channel (120) are perpendicular to each other.

5. The oil-impregnated hinged pin of claim 2, wherein, The oil injection nozzle (110) is a one-way valve.

6. The oil-impregnated hinged pin of claim 1, wherein, The limiting part comprises a first limiting plate (310), a second limiting plate (320) and a baffle (330), the first limiting plate (310) and the second limiting plate (320) are fixedly arranged on the side wall of the structure (200) and form a clamping channel with the side wall of the structure (200), the baffle (330) is arranged in the clamping channel, and the baffle (330) is used for preventing the axial movement of the pin shaft (100) outward.

7. The oil-impregnated hinged pin of claim 1, wherein, A stop portion (331) is arranged at the end of the baffle (330) close to the first limiting plate (310), and the stop portion (331) is used for limiting the movement of the baffle (330) towards the second limiting plate (320).

8. The oil-impregnated hinged pin of claim 7, wherein, A pair of baffle pin mounting seats (311) are arranged on the side of the first limiting plate (310) away from the second limiting plate (320), a baffle pin (312) is arranged between the two baffle pin mounting seats (311), and the baffle pin (312) is used for limiting the movement of the baffle (330) away from the second limiting plate (320). A through hole is arranged in the baffle (330) corresponding to the position of the oil injection nozzle (110).

9. The oil-impregnated hinged pin of claim 8, wherein, ​ 10. The oil-impregnated hinged pin of claim 7, wherein, Both ends of the baffle (330) are provided with detachable latches to prevent the baffle (330) from being separated from the first limiting plate (310) and the second limiting plate (320).

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