Crawler pin shaft and pin bush oil injector and oil injection device

Abstract

A track pin shaft and pin bush oil injector and an oil injection device belong to the technical field of oil injection devices and comprise a mounting seat, an oil duct is arranged in the mounting seat, an oil injection assembly is detachably mounted at one end of the mounting seat, an oil injection hole is formed in the oil injection assembly and communicated with the oil duct, and a cut-off assembly and a resorption assembly are fixedly mounted on the mounting seat. The cut-off assembly is provided with a cut-off piston, the back-suction assembly is provided with a back-suction piston, the cut-off piston and the back-suction piston are both movably installed in the installation base and are each connected with a driving unit, the cut-off piston is used for controlling connection and disconnection of the oil channel, and the back-suction piston is used for sucking residual grease at the oil injection hole back to the oil channel. The cut-off assembly can flexibly control connection and disconnection of an oil channel, operation can be conveniently carried out according to the oil injection requirement, the controllability of oil injection is improved, the resorption assembly can suck back residual grease in the oil injection hole, and the problem that the pin shaft end face grease and oil injection precision are poor due to residual pressure is solved.

Description

Technical Field

[0001] This utility model relates to the field of oil injection device technology, and in particular to a track pin bushing oiler and oil injection device. Background Technology

[0002] Track assemblies are an important component of the walking system of construction machinery. Due to their excellent stability during movement and ability to operate under various harsh conditions, they are widely used in the construction machinery field. A track assembly consists of several parts, including track links, pins, bushings, and track shoes. To improve the service life of the track assembly, it is essential to ensure sufficient grease between the pins and bushings.

[0003] Currently, grease injection equipment is commonly used to add grease between the pins and bushings of the track assembly. The grease injection equipment includes an injection connector, a connecting cavity, and a connecting part. The connecting part is used to connect with the cylinder and to install the pins and bushings. The connecting cavity has an oil inlet hole and is connected to the connecting part. The connecting part has an oil injection hole. The cylinder is used to tighten and position the pins and bushings. The grease enters between the pins and bushings through the oil inlet hole and the oil injection hole.

[0004] However, existing oiling equipment leaves excess grease at the injection hole due to residual pressure in the oil pipe after oiling. This excess grease is then squeezed onto the pin end face when the next workpiece is oiled, causing secondary contamination after pressing. This results in oil stains on the track surface. After the track assembly is assembled, it needs to be dipped in water-based paint. However, water-based paint is highly sensitive to oil stains, resulting in insufficient paint adhesion on the track assembly surface and paint peeling. In addition, because the existing oiling equipment is a single-hole type, it fails to form axial thrust in the gap between the pin and the pin sleeve, resulting in uneven oiling and affecting the service life of the track assembly. Utility Model Content

[0005] To address the technical problem in the existing pin and sleeve lubrication equipment mentioned above, where residual pressure in the oil pipe causes excess grease to remain at the lubrication hole, which then squeezes onto the pin end face, causing secondary contamination after pressing and resulting in oil stains on the track surface, thus affecting the quality of the track assembly, this utility model provides a track pin and sleeve lubricator and lubrication device.

[0006] The technical solution of this utility model is as follows:

[0007] This utility model provides a track pin sleeve lubricator, including a mounting base with an oil passage inside. A lubrication assembly is detachably mounted on one end of the mounting base, and the lubrication assembly has an oil injection hole communicating with the oil passage. A stop assembly and a suction assembly are fixedly mounted on the mounting base. The stop assembly has a stop piston, and the suction assembly has a suction piston. Both the stop piston and the suction piston are movably mounted within the mounting base. The stop piston and the suction piston are each connected to a drive unit. The stop piston controls the opening and closing of the oil passage, and the suction piston draws residual grease from the oil injection hole back into the oil passage. The stop assembly allows for flexible control of the oil passage, facilitating operation according to lubrication needs and improving the controllability of lubrication. The suction assembly draws back residual grease from the oil injection hole, preventing excess grease from remaining at the oil injection hole due to residual pressure in the oil passage after lubrication, thus preventing secondary contamination of the workpiece.

[0008] Preferably, the oil passage includes a main oil passage and several branch oil passages. The mounting base is provided with a suction chamber, which is connected to the main oil passage. The suction piston is movably disposed in the suction chamber. The arrangement of the main oil passage and the branch oil passages enables the grease to be evenly distributed to each oil injection position, ensuring that all parts of the pin and bushing are fully lubricated. The suction chamber and the suction piston cooperate to provide a structural basis for suctioning residual grease, ensuring the effective realization of the suction function.

[0009] Preferably, the oil injection assembly includes an oil injection head, which is a hollow cylindrical structure with several oil injection channels connected to the oil distribution channels. A grease injection rubber block is inserted inside the oil injection head, and several oil injection holes are spaced apart along the circumferential direction on the grease injection rubber block. The oil injection holes are connected to the oil injection channels. An annular pressure cap is detachably installed at the end of the oil injection head. The grease injection rubber block can provide a certain buffer and seal for the oil injection holes to prevent grease leakage. The pressure cap is detachable, which facilitates the installation and replacement of the grease injection rubber block and reduces maintenance costs.

[0010] Preferably, the end of the grease injection head away from the mounting base is provided with a stepped mounting port, and the grease injection rubber block has a stepped structure. The grease injection rubber block is inserted into the mounting port. The stepped mounting port matches the stepped structure of the grease injection rubber block, making the grease injection rubber block more stable and less prone to displacement, thus ensuring the stability and accuracy of grease injection.

[0011] Preferably, the center of the grease-filled rubber block is provided with a positioning and sealing hole for the pin insertion. The positioning and sealing hole is conical and can accurately position the pin, which facilitates the installation of the pin. The conical structure helps to guide the pin insertion and enhances the sealing performance, preventing grease from leaking from the pin insertion point. The oil filling hole is located on the periphery of the positioning and sealing hole.

[0012] Preferably, the mounting base is equipped with an ejector piston that is movably mounted inside. The ejector piston is coaxially arranged with the grease injection rubber block. The interior of the mounting base is connected to an air passage, which is connected to a pneumatic connector. The ejector piston can push the pin shaft to quickly separate from the grease injection rubber block without manual removal, thus reducing labor intensity and improving work efficiency.

[0013] Preferably, a connecting block is fixedly installed at the end of the mounting base away from the oiling component. The air passage is set inside the connecting block, and the connecting block is provided with a connection port for connecting with the oiling cylinder, so that the oiler can be connected to the oiling cylinder. Thus, the oiling cylinder can be used to drive the oiler to move, so as to achieve a tight fit between the oiler and the pin and the pin sleeve.

[0014] This utility model provides an oiling device, including: a frame; a lifting mechanism mounted on the frame for lifting pins and bushings; a material assembly mechanism located on one side of the lifting mechanism for assembling pins and bushings; and an oiling mechanism located on one side of the material assembly mechanism for adding grease to the assembled pin and bushing assembly. The oiling mechanism includes a track pin and bushing oiler. Through the coordinated work of these mechanisms, an integrated process from lifting and assembly to oiling of pins and bushings is achieved, improving production efficiency, reducing manual operation steps, and lowering labor intensity. At the same time, the track pin and bushing oiler ensures the quality of oiling.

[0015] As can be seen from the above technical solutions, the advantages of this utility model are:

[0016] 1. The shut-off component can flexibly control the opening and closing of the oil passage, making it convenient to operate according to the oil injection requirements and improving the controllability of oil injection. At the same time, it can assist the back suction component in its back suction work. The back suction component can use the action of the back suction piston to use negative pressure to suck back the residual grease at the oil injection hole, avoiding the presence of excess grease at the oil injection hole due to the residual pressure in the oil passage after oil injection, thus preventing secondary contamination of the workpiece.

[0017] 2. The main oil passage, branch oil passage, and several circumferential oil injection holes are designed to ensure that grease is evenly distributed to each oil injection position, so as to ensure that all parts between the pin and the pin sleeve are fully lubricated and improve the uniformity of lubrication.

[0018] 3. The grease injection rubber block can provide a certain buffer and seal for the oil injection hole to prevent grease leakage. The end of the oil injection head away from the mounting seat has a stepped mounting port. The stepped mounting port matches the stepped structure of the grease injection rubber block, making the grease injection rubber block more stable and less prone to displacement, thus ensuring the stability and accuracy of oil injection.

[0019] 4. The center of the grease-filled rubber block is provided with a positioning and sealing hole for the pin insertion. The positioning and sealing hole is conical and can accurately position the pin, which facilitates the installation of the pin. The conical structure helps to guide the pin insertion and enhances the sealing performance to prevent grease from leaking from the pin insertion point. The oil filling hole is located on the periphery of the positioning and sealing hole. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the main structure of the track pin sleeve oiler according to one or more embodiments of the present invention;

[0022] Figure 2 This is a cross-sectional structural schematic diagram of the track pin sleeve oiler according to one or more embodiments of the present invention;

[0023] Figure 3 This is a schematic diagram of the overall structure of the oil injection device according to one or more embodiments of the present invention.

[0024] Figure 4 This is a side view of the oil injection device according to one or more embodiments of the present invention.

[0025] Figure 5 This is a top view of the oil injection device according to one or more embodiments of the present invention.

[0026] The components represented by the various reference numerals in the diagram are:

[0027] 1. Mounting base; 2. Shut-off cylinder; 3. Back suction cylinder; 4. Connecting base; 5. Connecting shaft; 6. Plug; 7. Pneumatic connector; 8. Connecting block; 9. Oil injection head; 10. Grease injection rubber block; 11. Ejector piston; 12. Pressure cap; 13. Sealing ring; 14. Air passage; 15. Main oil passage; 16. Branch oil passage; 17. Back suction piston; 18. Oil injection channel; 19. Positioning sealing hole; 20. Lifting mechanism; 21. Material assembly mechanism; 22. Oil injection mechanism; 23. Ejector cylinder; 24. Oil injection cylinder. Detailed Implementation

[0028] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0029] Example 1

[0030] In a typical embodiment of this utility model, such as Figures 1-2 As shown, a track pin bushing lubricator is proposed, comprising: a mounting base 1, a stop assembly, a suction assembly, and a lubrication assembly. The mounting base 1 has an internal oil passage for connection to an oil source (oil pump). The lubrication assembly is detachably mounted on one end of the mounting base 1 and has an oil injection hole that communicates with the oil passage within the mounting base 1. The lubrication assembly is used to connect with the pin and bushing, and the oil injection hole is used to add grease between the pin and bushing. The stop assembly and the suction assembly are both mounted on the mounting base 1. The stop assembly has... The stop piston and the suction assembly are equipped with a suction piston 17. Both the stop piston and the suction piston 17 are movably installed in the mounting base 1, and the stop piston and the suction piston 17 are respectively connected to a drive unit to control the movement of the stop piston and the suction piston 17. In this way, the connection between the oil passage and the oil source can be cut off by the stop piston, and the grease at the oil injection hole can be sucked back into the oil passage by the suction piston 17. This avoids the presence of excess grease at the oil injection hole due to the residual pressure in the oil passage after oil injection, and prevents secondary contamination of the workpiece.

[0031] Specifically, such as Figure 2 As shown, the oil passage of the mounting base 1 is divided into a main oil passage 15 and several branch oil passages 16. The main oil passage 15 is connected to all the branch oil passages 16. Several oil injection holes are spaced apart along the circumference on the oil injection assembly. The branch oil passages 16 correspond one-to-one with the oil injection holes and are connected. The shut-off assembly includes a shut-off piston and a shut-off cylinder 2. A connecting shaft 5 is fixedly provided on the outside of the mounting base 1. The connecting shaft 5 has a hollow structure and external threads on its outer wall. The connecting shaft 5 is detachably installed with a connecting seat 4 by means of threaded connection. The shut-off cylinder 2 is fixedly installed on the connecting seat 4. The connecting seat 4 is provided with a transmission mechanism, such as a crank-slider mechanism, a lever mechanism, a gear and rack mechanism, etc. The shut-off cylinder 2 is connected to the shut-off piston through the transmission mechanism, thereby driving the shut-off piston to move. The shut-off piston is movably arranged in the main oil passage 15, and the shut-off piston and the main oil passage 15 are sealed by a sealing ring 13. The shut-off piston can be used to control the opening and closing of the main oil passage 15 to assist the back suction work of the back suction assembly.

[0032] It is understandable that the shut-off cylinder 2 can also be directly connected to the shut-off piston to directly drive the shut-off piston. The specific connection method between the two can be selected according to actual needs, and no further restrictions are imposed here.

[0033] The suction assembly includes a suction cylinder 3 and a suction piston 17. The suction cylinder 3 is fixedly mounted on the mounting base 1, which has a suction chamber that is connected to the main oil passage 15. The suction chamber is located near the connection between the main oil passage 15 and the branch oil passage 16. The suction piston 17 is movably disposed in the suction chamber. A sealing ring 13 is fixedly mounted on the suction piston 17 to ensure the sealing between the suction piston 17 and the suction chamber. The suction piston 17 is connected to the suction cylinder 3, which can drive the suction piston 17 to move directly. This allows the residual grease at the oil injection hole to be sucked back using negative pressure, thus solving the problem of residual pressure causing grease on the pin end face and poor oil injection accuracy.

[0034] The main oil passage 15 of the mounting base 1 has internal threads. When not in use, the main oil passage 15 can be sealed with a screw plug 6 to prevent contamination inside the main oil passage 15, thereby ensuring the cleanliness of the lubricating grease during use. A connecting block 8 is fixedly installed at the end of the mounting base 1 away from the oil injection component. The connecting block 8 is provided with a connection port for connecting with the oil injection cylinder 24. The oil injection cylinder 24 can be used to tighten the oil injection fixture with the pin and the pin sleeve. A sealing ring 13 is fixed between the connecting block 8 and the mounting base 1 to ensure the sealing of the connection between the connecting block 8 and the mounting base 1.

[0035] It is understandable that the oil injection cylinder 24 can also be an electric cylinder, hydraulic cylinder, or other structures. The specific choice can be made according to actual needs, and no further restrictions will be imposed here.

[0036] like Figure 2 As shown, the oil injection assembly includes an oil injection head 9, a grease injection rubber block 10, and a pressure cap 12. The oil injection head 9 is a hollow cylindrical structure and is fixedly installed on the mounting base 1 by welding, bolt connection, or other methods. The oil injection head 9 has several oil injection channels 18, which are used to connect with the oil distribution channels 16 on the mounting base 1. The grease injection rubber block 10 is inserted into the oil injection head 9 and has several grease injection holes spaced apart along the circumference for uniform oil injection. The oil injection holes are connected to the oil injection channels 18 and the oil injection holes are connected to the oil distribution channels 16 through the oil injection channels 18, thereby guiding the grease. The pressure cap 12 is connected to the oil injection head 9 by bolt connection. The pressure cap 12 is used to press the grease injection rubber block 10 to ensure the connection between the grease injection rubber block 10 and the oil injection head 9 and to prevent grease leakage.

[0037] Specifically, the end of the grease injection head 9 away from the mounting base 1 is provided with a stepped mounting port, the grease injection rubber block 10 has a stepped structure, the grease injection rubber block 10 is inserted into the mounting port at the end of the grease injection head 9, and the pressure cap 12 has a ring structure, which can ensure the connection between the pin shaft, the pin sleeve and the grease injection rubber block 10 while pressing the grease injection rubber block 10.

[0038] A positioning and sealing hole 19 is provided at the center of the grease-injecting rubber block 10. The positioning and sealing hole 19 is conical, and the pin is inserted into the positioning and sealing hole 19 to seal the circumference of the pin. The oil injection hole is located on the periphery of the positioning and sealing hole 19. During the oil injection process, one end of the pin is inserted into the positioning and sealing hole 19 for sealing and positioning, and one end of the pin sleeve abuts against the grease-injecting rubber block 10. The oil injection hole on the grease-injecting rubber block 10 is located between the pin and the pin sleeve, so that grease is injected between the pin and the pin sleeve.

[0039] Since the pin and the grease-filled rubber block 10 are sealed, an ejector piston 11 is provided in the mounting base 1 to facilitate the pin being pulled out of the grease-filled rubber sleeve 10. The ejector piston 11 is slidably disposed inside the mounting base 1 and is coaxially disposed with the grease-filled rubber block 10. A sealing ring 13 is installed on the ejector piston 11 to ensure the sealing of the connection between the ejector piston 11 and the mounting base 1. An air passage 14 is provided on the connecting block 8. One end of the air passage 14 is connected to the interior of the mounting base 1, and the other end of the air passage 14 is connected to a pneumatic connector 7 to connect to an air source, thereby controlling the movement of the ejector piston 11 so as to push the pin and the grease-filled rubber block 10 apart.

[0040] Example 2

[0041] In a typical embodiment of this utility model, such as Figures 3-5 As shown, an oiling device is proposed, which utilizes the oiler in Embodiment 1. The oiling device includes: a frame and a lifting mechanism 20, a material assembly mechanism 21 and an oiling mechanism 22 mounted on the frame. The lifting mechanism 20 is used for lifting the pin and pin sleeve to the material assembly mechanism 21. The material assembly mechanism 21 is used for assembling the pin and pin sleeve. The oiling mechanism 22 is used for adding grease to the assembled pin and pin sleeve.

[0042] like Figure 3 As shown, the lifting mechanism 20 includes a support block and a top material cylinder 23. The top material cylinder 23 is vertically arranged, and the support block is V-shaped. The support block is fixedly installed on the top material cylinder 23, and the support block is slidably connected to the slide rail on the frame through a slider. The support block is used to support the pin shaft and pin sleeve, and the top material cylinder 23 is used to drive the support block to move vertically.

[0043] The assembly mechanism 21 is located on one side of the lifting mechanism 20, and the assembly mechanism 21 and the lifting mechanism 20 are connected by an inclined first transition plate. After the lifting mechanism 20 lifts the pin and pin sleeve to the first transition plate, the pin and pin sleeve roll onto the assembly mechanism 21 under the action of gravity through the guidance of the first transition plate. The assembly mechanism 21 includes a first positioning block and an assembly cylinder. The first positioning block is provided with a V-shaped positioning groove for positioning the pin and pin sleeve. The assembly cylinder is connected to a push plate, which pushes the pin into the pin sleeve to realize the assembly of the pin and pin sleeve. The side wall of the positioning groove on the first positioning block near the oiling mechanism 22 is lower than the side wall near the lifting mechanism 20. A lifting mechanism is provided below the first positioning block to lift the assembled pin and pin sleeve in the positioning groove. The first positioning block is connected to the oiling mechanism 22 through an inclined second transition plate. The assembled pin and pin sleeve roll to the oiling mechanism 22 under the action of gravity for oiling.

[0044] The oil injection mechanism 22 includes an oil injection cylinder 24, an oil injection fixture, and a second positioning block. The second positioning block is connected to the first positioning block through a second transition plate. The second positioning block also has a V-shaped positioning groove, and the bottom of the second positioning block is also provided with a lifting mechanism. The oil injection cylinder 24 is fixedly connected to the connecting block 8 of the oil injection fixture to drive the movement of the oil injection fixture. The oil injection fixture is located on one side of the second positioning block, and a baffle is fixedly provided on the other side of the second positioning block. The oil injection fixture can cooperate with the baffle to tighten and limit the entire pin shaft and pin sleeve assembly.

[0045] Understandably, in order to improve the automation level of the oil injection device, several sensors can be installed on the frame to help position the workpiece and coordinate the work of each mechanism. The specific coordination method is existing technology and will not be elaborated on here.

[0046] The specific process for oil injection is as follows:

[0047] First, the oil injection cylinder 24 is activated, cooperating with the baffle to tighten the pin shaft and pin sleeve assembly, so that one end of the pin shaft is inserted into the positioning sealing hole 19, and one end of the pin sleeve passes through the pressure cover 12 and abuts against the end face of the grease injection rubber block 10. The oil injection hole on the grease injection rubber block 10 is located between the pin shaft and the pin sleeve, connecting the main oil passage 15 to the oil source to carry out the oil injection work.

[0048] After the oil filling is completed, the shut-off cylinder 2 and the suction cylinder 3 are activated in sequence. The shut-off piston moves into the main oil passage 15 to complete the oil passage shut-off and sealing work. The suction piston 17 performs a suction action to create a negative pressure in the main oil passage 15, thereby sucking back the residual grease in the oil filling hole and preventing the residual grease from contaminating the workpiece to be filled. At the same time, the air source connected to the pneumatic connector 7 works to inject high-pressure air into the mounting base 1, so as to use the high-pressure air to push the ejector piston 11 to move, and use the ejector piston 11 to push the push shaft to separate from the grease injection rubber block 10.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A track pin bushing oiler comprising: The application discloses a track pin and bushing oiling device.

2. The track pin bushing oiler of claim 1, wherein, The oil channel comprises a main oil channel (15) and a plurality of branch oil channels (16) which are communicated.

3. The track pin bushing oiler of claim 2, wherein, The oiling assembly comprises an oiling head (9), the oiling head (9) is a hollow cylindrical structure, a plurality of oiling holes (18) are formed on the oiling head (9), the oiling holes (18) are connected with the branch oil channels (16), a grease injection rubber block (10) is inserted in the oiling head (9), a plurality of oiling holes are formed on the grease injection rubber block (10) in a ring direction, the oiling holes are communicated with the oiling holes (18), and an annular gland (12) is detachably arranged on the end of the oiling head (9).

4. The track pin bushing oiler of claim 3, wherein, The end, away from the mounting seat (1), of the oiling head (9) is provided with a stepped mounting port, the grease injection rubber block (10) is a stepped structure, and the grease injection rubber block (10) is inserted in the mounting port.

5. The track pin bushing oiler of claim 3, wherein, A positioning sealing hole (19) for pin shaft insertion is formed at the center position of the grease injection rubber block (10), the positioning sealing hole (19) is tapered, and the oiling holes are formed on the side of the positioning sealing hole (19).

6. The track pin bushing oiler of claim 3, wherein, A top-out piston (11) is movably arranged in the mounting seat (1), the top-out piston (11) is coaxially arranged with the grease injection rubber block (10), the inside of the mounting seat (1) is communicated with an air channel (14), and the air channel (14) is connected with a pneumatic connector (7).

7. The track pin bushing oiler of claim 6, wherein, The end, away from the oiling assembly, of the mounting seat (1) is fixedly provided with a connecting block (8), the air channel (14) is arranged in the connecting block (8), and the connecting block (8) is provided with a connecting port for connecting with an oiling cylinder (24).

8. An oiling device characterized by The application further discloses a track pin and bushing oiling device. The device comprises a rack, a lifting mechanism (20) arranged on the rack and used for lifting a pin shaft and a pin sleeve, a material assembling mechanism (21) arranged on one side of the lifting mechanism (20) and used for assembling the pin shaft and the pin sleeve, and an oiling mechanism (22) arranged on one side of the material assembling mechanism (21) and used for injecting lubricating grease into the assembled pin shaft and pin sleeve assembly. The oiling mechanism (22) comprises the track pin and bushing oiling device. ​ ​

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