Auxiliary oil filtering device for hydraulic oil of miniature excavator

Abstract

The utility model relates to the field of auxiliary oil filtering devices of excavators, and discloses an auxiliary oil filtering device for hydraulic oil of a miniature excavator, which comprises an oil return pipe, an oil suction pipe penetrates through the inner wall of the oil return pipe and is fixedly connected with the inner wall of the oil return pipe, and the surfaces of the oil return pipe and the oil suction pipe are fixedly connected with connecting ports. And hooping assemblies are arranged on the surfaces of the two sets of connecting openings, each hooping assembly comprises a fixing seat, a guide column is fixedly connected to the outer wall of the top end of the fixing seat, a U-shaped seat is fixedly connected to the bottom end of the outer wall of the connecting rod, a hooping plate is fixedly connected to the end, away from the connecting rod, of the U-shaped seat, and an extending assembly is arranged on the inner wall of the oil return pipe. According to the utility model, when the aperture of the hydraulic oil tank is too small and an oil inlet pipeline and an oil return pipeline cannot be inserted at the same time, normal hydraulic oil filtering operation can be completed by using the device, so that the cleanliness of hydraulic oil in a hydraulic element is ensured, and the reliability and the high efficiency of a product are further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to excavator auxiliary oil filter device field especially to a kind of auxiliary oil filter device for micro excavator hydraulic oil. BACKGROUND

[0002] The working device, running system and steering system of excavator cannot be separated from hydraulic system, and the hydraulic oil cleanliness often determines the reliability of excavator hydraulic system and the service life of hydraulic system most.

[0003] The oil filter is a kind of equipment for filtering and cleaning oil, commonly used in industrial and automotive fields. It removes impurities, dirt and water in oil to ensure the quality and performance of oil. When filtering hydraulic oil in excavator, an oil filter is usually used.

[0004] However, some micro excavators have relatively small space, resulting in relatively small oil filling hole of hydraulic oil tank, so that the two oil filter pipes of oil inlet and oil return on the hydraulic oil filter cannot be inserted into the oil tank for oil filtering operation, so that the hydraulic oil tank of micro excavator cannot be filtered, which will directly affect the service life of excavator. Therefore, an auxiliary oil filter device for micro excavator hydraulic oil is proposed to solve the above problems. UTILITY MODEL CONTENT

[0005] In order to make up for the above shortcomings, the utility model provides an auxiliary oil filter device for micro excavator hydraulic oil, which aims to improve the problem that the oil filling hole of hydraulic oil tank is relatively small in the prior art, so that the two oil filter pipes of oil inlet and oil return on the hydraulic oil filter cannot be inserted into the oil tank for oil filtering operation.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: an auxiliary oil filter device for micro excavator hydraulic oil, comprising an oil return pipe, an oil suction pipe is through and fixedly connected to the inner wall of the oil return pipe, a connecting port is fixedly connected to the surface of the oil return pipe and the oil suction pipe, a hoop assembly is arranged on the surface of the two groups of connecting ports, the hoop assembly comprises a fixed seat;

[0007] The outer wall of the top end of the fixed seat is fixedly connected with a guide column, the surface of the guide column is through and slidably connected with a sliding sleeve, the inner wall of the sliding sleeve is elastically connected with a plug rod through a limiting spring, the outer wall of the sliding sleeve on both sides is hinged with a hinge rod, the end away from the sliding sleeve of the hinge rod is hinged with a connecting rod, the bottom end of the outer wall of the connecting rod is fixedly connected with a U-shaped seat, the end away from the connecting rod of the U-shaped seat is fixedly connected with a hoop plate, the inner wall of the oil return pipe is provided with an extension assembly.

[0008] Further description of the above technical scheme:

[0009] The extension assembly includes a thick sleeve, with two sets of connecting blocks fixedly connected to the inner sidewall of the thick sleeve. A thin sleeve is fixedly connected to the end of the connecting block away from the thick sleeve. Multiple sets of internal thread grooves are formed on the outer sidewall of the thick sleeve, and bolts are threadedly connected to the inner wall of the internal thread groove of the thick sleeve.

[0010] As a further description of the above technical solution:

[0011] The fixing seat is fixedly connected to the outer wall of the connection port, and the insertion rod passes through and is slidably connected to the inner wall of the sliding sleeve.

[0012] As a further description of the above technical solution:

[0013] One end of the limiting spring is fixedly connected to the inner wall of the sliding sleeve, and the other end of the limiting spring is fixedly connected to the surface of the insertion rod.

[0014] As a further description of the above technical solution:

[0015] The guide post has multiple sets of through holes on its surface, and the bottom end of the outer wall of the insertion rod is inserted into the inner wall of the through hole.

[0016] As a further description of the above technical solution:

[0017] The connecting rod is slidably connected to the inner walls on both sides of the fixed seat, and the U-shaped seat is slidably connected to the inner walls on both sides of the fixed seat.

[0018] As a further description of the above technical solution:

[0019] The inner sidewall of the return oil pipe is provided with a guide groove, the outer wall of the coarse sleeve is slidably connected to the inner wall of the guide groove of the return oil pipe, the inner wall of the bottom end of the return oil pipe is provided with an internal thread groove, and the bolt passes through and is threadedly connected to the inner wall of the internal thread groove of the return oil pipe.

[0020] As a further description of the above technical solution:

[0021] The outer sidewall of the oil suction pipe is provided with a guide groove, and the inner sidewall of the thin sleeve is provided with a protrusion. The inner sidewall of the thin sleeve is slidably connected to the inner wall of the outer guide groove of the oil suction pipe.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, it can be ensured that when the diameter of the hydraulic oil tank is too small to be simultaneously inserted into the inlet and return oil lines, the device can still complete the normal hydraulic oil filtration operation, thereby ensuring the cleanliness of the hydraulic oil in the hydraulic components and further improving the reliability and efficiency of the product.

[0024] 2. In this utility model, the clamping component can clamp and fix oil filter pipes of different diameters, effectively preventing the pipes from falling off due to excessive pressure during the oil filtration process, ensuring the normal circulation and filtration effect of hydraulic oil, and at the same time improving the safety of the work and avoiding the safety hazards caused by hydraulic oil leakage.

[0025] 3. In this utility model, the design of the extension component allows the length of the oil suction pipe to be adjusted according to the depth of the outer cover of the hydraulic oil tank of different excavators, adapting to hydraulic oil tanks of different sizes. This highly adaptable design expands the application range of the device and improves its versatility. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of an auxiliary oil filtration device for hydraulic oil in a mini excavator, as proposed in this utility model.

[0027] Figure 2 This is a partial cross-sectional view of the fixed base, sliding sleeve, and guide column of an auxiliary oil filtering device for hydraulic oil in a mini excavator, as proposed in this utility model.

[0028] Figure 3 This is a partial cross-sectional view of the return pipe, coarse sleeve, and fine sleeve of an auxiliary oil filtration device for hydraulic oil in a mini excavator, as proposed in this utility model.

[0029] Figure 4 This utility model proposes an auxiliary oil filtration device for hydraulic oil in mini excavators. Figure 3 Enlarged structural diagram of section A.

[0030] Legend:

[0031] 1. Return oil pipe; 2. Suction oil pipe; 3. Connecting port; 4. Clamping assembly; 41. Fixing seat; 42. Guide post; 43. Sliding sleeve; 44. Limiting spring; 45. Insert rod; 46. Hinge rod; 47. Connecting rod; 48. U-shaped seat; 49. Clamping plate; 5. Extension assembly; 51. Coarse sleeve; 52. Connecting block; 53. Fine sleeve; 54. Bolt. Detailed Implementation

[0032] 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.

[0033] Reference Figure 1 - Figure 3This utility model provides an embodiment of an auxiliary oil filtration device for hydraulic oil in a mini excavator, comprising a return pipe 1, with a suction pipe 2 fixedly connected to the inner wall of the return pipe 1. The diameter of the suction pipe 2 is smaller than that of the return pipe 1, so that after the suction pipe 2 is installed on the inner wall of the return pipe 1, the excavator oil sucked in by the lower connection port 3 will enter the interior of the return pipe 1 through the upper connection port 3, and thus return to the hydraulic oil tank of the excavator through the gap between the return pipe 1 and the suction pipe 2. Both the return pipe 1 and the suction pipe 2 are fixedly connected to the surface of the connection port 3, and both sets of connection ports 3 are provided with edges, so that the two sets of connection ports 3 can be easily connected and fixed to the oil inlet and outlet of the oil filter. Both sets of connection ports 3 are provided with clamping components 4.

[0034] Reference Figure 1 and Figure 2 The clamping assembly 4 includes a fixed base 41, which is fixedly connected to the outer wall of the connection port 3. A guide post 42 is fixedly connected to the outer wall of the top of the fixed base 41. A sliding sleeve 43 is slidably connected through the surface of the guide post 42. The shape of the inner side of the sliding sleeve 43 matches the outer diameter of the guide post 42, so that the sliding sleeve 43 can only move linearly up and down on the inner wall of the guide post 42. A plug rod 45 is elastically connected to the inner wall of the sliding sleeve 43 through a limiting spring 44. One end of the limiting spring 44 is fixedly connected to the inner wall of the sliding sleeve 43, and the other end of the limiting spring 44 is fixedly connected to the surface of the plug rod 45. The limiting spring 44 can automatically reset the position of the insert rod 45 after it is pulled outward. The surface of the insert rod 45 is provided with a protrusion, which is connected and fixed to the limiting spring 44. The surface of the guide post 42 is provided with multiple sets of through holes. The bottom end of the outer wall of the insert rod 45 is inserted into the inner wall of the through hole. The insertion between the two moves the sliding sleeve 43 up and down, pulling the hinge rod 46 so that the corresponding connecting rod 47 and U-shaped seat 48 can press the oil filter pipes of different diameters on the outside of the connection port 3, so as to prevent the pipes from detaching from the surface of the connection port 3 due to excessive pressure during use.

[0035] Reference Figure 2The insertion rod 45 passes through and slides on the inner wall of the sliding sleeve 43. Hinged rods 46 are hinged to the outer walls of both sides of the sliding sleeve 43. A connecting rod 47 is hinged to the end of the hinged rod 46 away from the sliding sleeve 43. When the sliding sleeve 43 moves up and down, it synchronously pulls the corresponding connecting rod 47 through the hinged rod 46, thereby causing the connecting rod 47 to drive the corresponding U-shaped seats 48 to move closer together, thus pressing the oil filter pipes of different diameters installed on the surface of the connection port 3. The bottom end of the outer wall of the connecting rod 47 is fixedly connected to the U-shaped seat 48. The connecting rod... 47 This allows the movement of the U-shaped seat 48 to be guided, so that it can only move back and forth on the inner wall of the fixed seat 41. The connecting rod 47 is slidably connected to the inner walls on both sides of the fixed seat 41, and the U-shaped seat 48 is slidably connected to the inner walls on both sides of the fixed seat 41. A clamping plate 49 is fixedly connected to the end of the U-shaped seat 48 away from the connecting rod 47. The two sets of clamping plates 49 are arc-shaped, so that the pipe sleeved on the outer wall of the connection port 3 is pressed by the mutual approach of the two sets of clamping plates 49. An extension component 5 is provided on the inner wall of the return oil pipe 1.

[0036] Reference Figure 1 and Figure 3 The extension component 5 includes a coarse sleeve 51. A guide groove is formed on the inner sidewall of the return oil pipe 1. The outer wall of the coarse sleeve 51 is slidably connected to the inner wall of the guide groove in the return oil pipe 1. By forming a guide groove on the inner side of the return oil pipe 1 that fits the outer side of the coarse sleeve 51, the coarse sleeve 51 can move linearly up and down along the inner wall of the return oil pipe 1. Simultaneously, the outer diameter of the coarse sleeve 51 fits the inner side of the return oil pipe 1, ensuring no gaps occur during its movement. An internal thread groove is formed on the inner wall of the bottom end of the return oil pipe 1. A bolt 54 passes through and is threaded into the inner wall of the internal thread groove in the return oil pipe 1. Two sets of connecting blocks 52 are fixedly connected to the inner sidewall of the coarse sleeve 51. A fine sleeve 53 is fixedly connected to the end of the connecting block 52 away from the coarse sleeve 51. By setting the connecting blocks 52, the coarse sleeve 51 can move synchronously with the fine sleeve 53, allowing adjustment according to the depth of the outer cover of the hydraulic oil tank of different excavators.

[0037] Reference Figure 3 and Figure 4The outer sidewall of the suction pipe 2 is provided with a guide groove, and the inner sidewall of the thin sleeve 53 is provided with a protrusion. By providing a guide groove on the outer sidewall of the suction pipe 2 that fits the thin sleeve 53, the thin sleeve 53 can only move up and down linearly on the outer wall of the suction pipe 2, thereby adjusting the length of the suction pipe 2 to adjust the hydraulic oil tank of the excavator at different depths. The inner sidewall of the thin sleeve 53 is slidably connected to the inner wall of the outer guide groove of the suction pipe 2. The outer sidewall of the coarse sleeve 51 is provided with multiple sets of internal thread grooves. The inner wall of the internal thread groove of the coarse sleeve 51 is threaded with a bolt 54. The bolt 54 passes through the bottom end of the suction pipe 2 and engages with the multiple sets of threads on the outer side of the coarse sleeve 51, so that the coarse sleeve 51 drives the thin sleeve 53 through the connecting block 52 to fix the position of the return pipe 1 and the suction pipe 2 after adjustment according to the depth of different excavator cover parts.

[0038] Working principle: When using this auxiliary oil filter device on a mini excavator, firstly, based on the depth of the outer cover of the excavator's hydraulic oil tank, adjust the length of the suction pipe 2 via the extension component 5. First, loosen the bolt 54 to disengage it from the threaded hole of the coarse sleeve 51 at its current position. Then, move the coarse sleeve 51, which moves linearly up and down on the inner wall of the return oil pipe 1. This is done by the connecting block 52, which drives the fine sleeve 53 to move synchronously. The fine sleeve 53 moves linearly up and down in the guide groove on the outer side wall of the suction pipe 2, thereby adjusting the length of the suction pipe 2. Once the appropriate length is reached, tighten the bolt 54 so that it passes through the bottom end of the suction pipe 2 and engages with the multiple sets of threads on the outer side of the coarse sleeve 51. Then, fix the coarse sleeve 51 to the position of the return oil pipe 1 and the suction pipe 2 after adjustment according to the depth of different excavator covers, and finally insert the device into the bottom of the hydraulic oil tank.

[0039] The oil filter pipe is fitted onto the outside of the connection port 3. The clamping plate 49 is adjusted and pressed and fixed by the clamping assembly 4. The insertion rod 45 is pulled outward to disengage from the through hole on the surface of the guide post 42. At this time, the limit spring 44 is stretched. Then the sliding sleeve 43 is moved upward. When the sliding sleeve 43 moves, it pulls the connecting rod 47 through the hinge rod 46, so that the connecting rod 47 drives the U-shaped seat 48 and the clamping plate 49 to move closer to each other, pressing the oil filter pipes of different diameters installed on the surface of the connection port 3. When it is adjusted to a suitable position, the insertion rod 45 is released. The limit spring 44 automatically resets the position of the insertion rod 45 after it has been pulled outward, so that the bottom end of the outer wall of the insertion rod 45 is inserted into the through hole of the guide post 42 at the current position. The sliding sleeve is then... 43. Move the hinge rod 46 up and down to press the corresponding connecting rod 47 and U-shaped seat 48 against the oil filter pipes of different diameters on the outside of the connection port 3, so as to prevent the pipes from detaching from the surface of the connection port 3 due to excessive pressure during use. Then start the oil filter. The hydraulic oil in the hydraulic tank is drawn into the oil filter from the lower connection port 3 for filtration. Operate the excavator in place to make the hydraulic oil in each hydraulic component continuously circulate back to the oil tank. The filtered hydraulic oil returns to the return oil pipe 1 from the upper connection port 3, and then returns to the oil tank from the gap between the return oil pipe 1 and the suction oil pipe 2. This cycle is repeated for eight to fifteen minutes to ensure the cleanliness of the hydraulic oil in the entire hydraulic system, thereby ensuring the excavator's completion and delivery.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An auxiliary oil filtration device for hydraulic oil in mini excavators, comprising a return oil pipe (1), characterized in that: The inner wall of the return oil pipe (1) is penetrated and fixedly connected to the suction pipe (2). The surfaces of the return oil pipe (1) and the suction pipe (2) are fixedly connected to the connection port (3). The surfaces of the two sets of connection ports (3) are provided with clamping components (4). The clamping components (4) include a fixing seat (41). A guide post (42) is fixedly connected to the outer wall of the top of the fixed seat (41). A sliding sleeve (43) is slidably connected through the surface of the guide post (42). An insert rod (45) is elastically connected to the inner wall of the sliding sleeve (43) through a limiting spring (44). A hinge rod (46) is hinged to the outer walls on both sides of the sliding sleeve (43). A connecting rod (47) is hinged to the end of the hinge rod (46) away from the sliding sleeve (43). A U-shaped seat (48) is fixedly connected to the bottom of the outer wall of the connecting rod (47). A clamping plate (49) is fixedly connected to the end of the U-shaped seat (48) away from the connecting rod (47). An extension component (5) is provided on the inner wall of the return oil pipe (1).

2. The auxiliary oil filtering device for hydraulic oil in a mini excavator according to claim 1, characterized in that: The extension component (5) includes a coarse sleeve (51), and two sets of connecting blocks (52) are fixedly connected to the inner sidewall of the coarse sleeve (51). A fine sleeve (53) is fixedly connected to the end of the connecting block (52) away from the coarse sleeve (51). Multiple sets of internal thread grooves are opened on the outer sidewall of the coarse sleeve (51), and bolts (54) are threadedly connected to the inner wall of the internal thread groove of the coarse sleeve (51).

3. The auxiliary oil filtering device for hydraulic oil in a mini excavator according to claim 1, characterized in that: The fixing seat (41) is fixedly connected to the outer wall of the connection port (3), and the insertion rod (45) passes through and is slidably connected to the inner wall of the sliding sleeve (43).

4. The auxiliary oil filtering device for hydraulic oil in a mini excavator according to claim 1, characterized in that: One end of the limiting spring (44) is fixedly connected to the inner wall of the sliding sleeve (43), and the other end of the limiting spring (44) is fixedly connected to the surface of the insert rod (45).

5. The auxiliary oil filtering device for hydraulic oil in a mini excavator according to claim 1, characterized in that: The guide post (42) has multiple sets of through holes on its surface, and the bottom end of the outer wall of the insert rod (45) is inserted into the inner wall of the through hole.

6. The auxiliary oil filtering device for hydraulic oil in a mini excavator according to claim 1, characterized in that: The connecting rod (47) is slidably connected to the inner walls on both sides of the fixed seat (41), and the U-shaped seat (48) is slidably connected to the inner walls on both sides of the fixed seat (41).

7. An auxiliary oil filtration device for hydraulic oil in a mini excavator according to claim 2, characterized in that: The inner side wall of the return pipe (1) is provided with a guide groove, the outer wall of the coarse sleeve (51) is slidably connected to the inner wall of the guide groove of the return pipe (1), the inner wall of the bottom end of the return pipe (1) is provided with an internal thread groove, and the bolt (54) passes through and is threadedly connected to the inner wall of the internal thread groove of the return pipe (1).

8. The auxiliary oil filtering device for hydraulic oil in a mini excavator according to claim 2, characterized in that: The outer sidewall of the oil suction pipe (2) is provided with a guide groove, and the inner sidewall of the thin sleeve (53) is provided with a protrusion. The inner sidewall of the thin sleeve (53) is slidably connected to the inner wall of the outer guide groove of the oil suction pipe (2).

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