Oil cylinder

Abstract

The utility model discloses an oil cylinder. The oil cylinder comprises an oil cylinder body and a filtering assembly. An oil inlet is formed in the oil cylinder main body, and the filter assembly is mounted at the oil inlet through a quick release structure; and the quick release structure is suitable for axially locking the filtering assembly. The oil cylinder has the beneficial effects that compared with an existing oil cylinder, the filtering assembly is arranged in the oil inlet formed in the oil cylinder, oil can enter the oil cylinder in a high-purity mode through the filtering assembly so that all components in the oil cylinder can be lubricated, friction and abrasion between all the components are reduced, and the service life of the oil cylinder is prolonged. Therefore, the operation efficiency and stability of the equipment are improved.

Description

Technical Field

[0001] This application relates to the field of hydraulic cylinders, specifically to a type of hydraulic cylinder. Background Technology

[0002] A hydraulic cylinder, also known as a hydraulic cylinder, is an actuator in a hydraulic system. It achieves linear reciprocating motion of various mechanical devices by inputting fluid flow and pressure, and outputting linear velocity and force. However, the purity of the hydraulic oil entering the cylinder is crucial, as it directly affects the cylinder's working efficiency and the equipment's lifespan. High-purity hydraulic oil better lubricates the components inside the cylinder, reducing friction and wear, thereby improving the equipment's operating efficiency and stability.

[0003] The existing hydraulic cylinders do not have a filter at the oil inlet. This results in the inability to effectively filter the oil entering the cylinder, making it impossible to control the purity of the oil. Consequently, the friction and wear of the components inside the cylinder cannot be controlled during operation, thus compromising the operating efficiency and stability of the equipment.

[0004] Therefore, it is now necessary to modify the existing hydraulic cylinders. Utility Model Content

[0005] The purpose of this application is to provide a hydraulic cylinder that can solve at least one of the defects in the above-mentioned background art.

[0006] To achieve at least one of the above objectives, the technical solution adopted in this application is as follows: a hydraulic cylinder, comprising a hydraulic cylinder body and a filter assembly; the hydraulic cylinder body is provided with an oil inlet, and the filter assembly is installed at the oil inlet via a quick-release structure; the quick-release structure is adapted to axially lock the filter assembly.

[0007] Preferably, the inner wall of the oil inlet is provided with a stepped portion; the filter assembly and the stepped portion are connected by the quick-release structure, so that the filter assembly is tightly attached to the stepped portion.

[0008] Preferably, the filter assembly includes a connecting pipe and a groove disposed on the outer wall of the connecting pipe, and a protrusion is disposed on the inner wall of the stepped portion; the connecting pipe is adapted to carry the groove axially and horizontally disposed in the oil inlet, and the groove and the protrusion cooperate to form the quick-release structure.

[0009] Preferably, the filter assembly includes a connecting pipe and a protrusion disposed on the outer wall of the connecting pipe, and the inner wall of the stepped portion is provided with a sliding groove; the connecting pipe is adapted to carry the protrusion axially and horizontally disposed in the oil inlet, and the protrusion and the sliding groove cooperate to form the quick-release structure.

[0010] Preferably, the slide groove includes a first groove segment and a second groove segment; when the connecting pipe and the step portion are connected, the connecting pipe is adapted to be inserted into the step portion and rotate, and the protrusion is adapted to slide along the first groove segment and the second groove segment of the slide groove successively.

[0011] Preferably, the second groove is inclined; or the second groove is spirally arranged; when the protrusion rotates within the second groove, it is adapted to generate frictional self-locking with the second groove.

[0012] Preferably, the filter assembly further includes a filter screen; the filter screen is fixedly connected to the inner wall of the connecting pipe.

[0013] Preferably, a rubber pad is provided between the connecting pipe and the step portion. When the connecting pipe and the step portion are connected, the rubber pad is in a compressed state so as to form a tight connection between the connecting pipe and the step portion.

[0014] Preferably, the end faces at the connection between the connecting pipe and the stepped portion are respectively a protruding portion and a concave portion with corresponding shapes, and the rubber pad is disposed between the protruding portion and the concave portion.

[0015] Preferably, a connecting portion is provided on the outer side of the oil inlet of the cylinder body; a driving portion is provided at the end of the connecting pipe; and the driving portion extends out of the connecting portion.

[0016] Compared with the prior art, the beneficial effects of this application are as follows:

[0017] Compared to existing hydraulic cylinders, this application has a filter assembly installed in the oil inlet of the hydraulic cylinder. The filter assembly allows the oil to enter the hydraulic cylinder with high purity, so as to lubricate the various components inside the hydraulic cylinder, reduce the friction and wear between the components, and thus improve the operating efficiency and stability of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0020] Figure 3 This utility model Figure 2 A magnified view of a portion of point A in the middle.

[0021] Figure 4 This is a cross-sectional structural diagram of the stepped portion in this utility model.

[0022] Figure 5 This is a schematic diagram of the connecting pipe and the protrusion in this utility model.

[0023] In the figure: 1. Oil cylinder body, 10. Oil inlet, 100. Step, 101. Slide, 101. First groove, 1010. Second groove, 1011. Recess, 102. Connecting part, 11. Filter assembly, 2. Connecting pipe, 20. Filter screen, 21. Protrusion, 22. Transmission chamber, 23. Drive part, 24. Protrusion, 25. Quick release structure, 3. Rubber pad. Detailed Implementation

[0024] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0026] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0027] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0028] One preferred embodiment of this application, such as Figures 1 to 5 As shown, a hydraulic cylinder includes a cylinder body 1 and a filter assembly 2. The cylinder body 1 is provided with an oil inlet, and the filter assembly 2 is installed at the oil inlet 10 via a quick-release structure 3. The quick-release structure 3 can axially lock the filter assembly 2.

[0029] It should be understood that the purity of the oil entering the hydraulic cylinder body 1 is crucial, as it directly affects the working efficiency and lifespan of the equipment. Currently, the hydraulic cylinder body 1 lacks a filter assembly 2 at its oil inlet 10. This results in ineffective oil filtration during operation, leading to uncontrolled oil purity. Consequently, friction and wear on the components within the cylinder body 1 during operation cannot be controlled, ultimately compromising the equipment's operational efficiency and stability.

[0030] Therefore, in this embodiment, a filter assembly 2 is provided in the oil inlet 10 provided on the cylinder body 1. The filter assembly 2 allows oil to enter the cylinder body 1 with high purity, so as to lubricate the various components in the cylinder body 1, reduce the friction and wear between the components, and thus improve the operating efficiency and stability of the equipment.

[0031] In this embodiment, there are many methods to improve the purity of the oil entering the cylinder body 1, but most of them have complex structures and high design costs. Therefore, in this embodiment, a filter assembly 2 is directly installed inside the oil inlet 10 to directly filter the oil entering the cylinder body 1.

[0032] It is understandable that a filter assembly 2 is installed inside the oil inlet 10, but the filtering effect of the filter assembly 2 will inevitably decrease after long-term use. Therefore, the filter assembly 2 must be conveniently and removably installed inside the oil inlet 10.

[0033] Therefore, in this embodiment, as Figure 2 , 3 As shown, a stepped portion 100 is provided on the inner wall of the oil inlet 10. The filter assembly 2 and the stepped portion 100 can be connected by a quick-release structure 3. After the filter assembly 2 is installed, it is tightly attached to the stepped portion 100.

[0034] In this embodiment, the filter assembly 2 can be quickly connected to the step portion 100 via the quick-release structure 3. However, there are multiple ways to connect the filter assembly 2 and the step portion 100 via the quick-release structure 3, including but not limited to the two described below.

[0035] Method 1: The filter assembly 2 includes a connecting pipe 20 and a groove 101 disposed on the outer wall of the connecting pipe 20. A protrusion 22 is disposed on the inner wall of the stepped portion 100. The connecting pipe 20 can carry the groove 101 and be axially and horizontally disposed in the oil inlet 10, and the groove 101 and the protrusion 22 cooperate to form a quick-release structure 3.

[0036] Method 2: The filter assembly 2 includes a connecting pipe 20 and a protrusion 22 disposed on the outer wall of the connecting pipe 20. The inner wall of the stepped portion 100 is provided with a groove 101. The connecting pipe 20 can carry the protrusion 22 and be axially and horizontally disposed in the oil inlet 10, and the protrusion 22 and the groove 101 cooperate to form a quick-release structure 3.

[0037] It should be understood that both of the above-mentioned configuration methods can meet the requirements of this application, and those skilled in the art can choose according to actual needs; in this embodiment, the second method is preferred.

[0038] It is understandable that both connection methods 1 and 2 can meet the requirements of this embodiment. However, the structure of the connecting pipe 20 is relatively simple and its wall thickness is relatively thin. If a groove 101 is provided on the connecting pipe 20, it may lead to instability in the structure of the connecting pipe 20. When oil is introduced into the oil inlet 10, the oil inlet 10 will inevitably be filled with pressure. If the structure of the connecting pipe 20 is not stable enough, the filter assembly 2 may not be able to withstand the pressure when the oil cylinder body 1 is introduced, thereby affecting the normal operation of the oil cylinder body 1, and thus affecting the operating efficiency and stability of the equipment.

[0039] Therefore, in this embodiment, a protrusion 22 is provided on the connecting pipe 20, and a groove 101 is provided on the stepped portion 100. This ensures the stability of the connection between the filter assembly 2 and the stepped portion 100, thereby guaranteeing the operating efficiency and stability of the equipment.

[0040] In this embodiment, in order to enable the connecting pipe 20 to carry the protrusion 22 to connect with the quick-release structure 3 and the step portion 100 through the slide groove 101, the slide groove 101 is divided into a first groove segment 1010 and a second groove segment 1011.

[0041] Therefore, in this embodiment, as Figure 3 As shown, when the connecting pipe 20 and the step portion 100 are connected, the connecting pipe 20 can be inserted into the step portion 100 and rotated, so that the protrusion 22 can slide along the first groove section 1010 and the second groove section 1011 of the slide groove 101, and then the connecting pipe 20 is locked in the oil inlet 10 by the protrusion 22.

[0042] Understandably, the protrusion 22 can slide within the second groove 1011. When oil begins to enter the cylinder body 1, its oil inlet 10 will be filled with the pressure generated during oil entry. Under this long-term pressure, the protrusion 22 may rotate under pressure, thereby causing problems with the stability of the connection between its filter assembly 2 and the step portion 100, resulting in loosening of the connection between its filter assembly 2 and the step portion 100, and consequently reducing the operating efficiency and stability of the equipment.

[0043] Therefore, in this embodiment, the first groove segment 1010 of the slide groove 101 is axially horizontally positioned with respect to the step portion 100. The second groove segment 1011 of the slide groove 101 allows the protrusion 22 to engage in frictional self-locking with the second groove segment 1011 when sliding within it. This arrangement enables the connecting pipe 20 to connect more stably to the step portion 100 through the frictional self-locking of the protrusion 22 and the second slide groove 1011, thereby improving the operating efficiency and stability of the equipment. To meet the above requirements, there are various ways to configure the structure of the second groove segment 1011, including but not limited to the two described below.

[0044] Method 1: The second groove 1011 is set in a spiral shape. When the protrusion 22 slides in the second groove 1011, it can rub against the spiral second groove 1011 for self-locking.

[0045] Method 2: For example Figure 4 As shown, the second groove segment 1011 is inclined, and the protrusion 22 can self-lock with the inclined second groove segment 1011 when sliding in the second groove segment 1011.

[0046] It should be understood that both of the above-mentioned configuration methods can meet the requirements of this application, and those skilled in the art can choose according to actual needs; in this embodiment, the second method is preferred.

[0047] It should also be noted that the second groove segment 1011 is inclined, and its inclination angle is smaller than the friction angle when the protrusion 22 and the second groove segment 1011 rub against each other.

[0048] In this embodiment, as Figure 3 As shown, the filter assembly 2 also includes a filter screen 21, and a conveying cavity 23 is provided on the connecting pipe 20, with the filter screen 21 fixedly installed in the conveying cavity 23.

[0049] In this embodiment, when oil is introduced into the cylinder body 1, the connection between its connecting pipe 20 and the stepped portion 100 must be sealed. Otherwise, oil leakage may occur at the oil inlet 10, affecting the normal use of the cylinder body 1, and consequently affecting the operating efficiency and stability of the equipment.

[0050] Therefore, in this embodiment, a rubber pad 4 is provided between the connecting pipe 20 and the step portion 100. When the connecting pipe 20 and the step portion 100 are connected, the rubber pad 4 is in a compressed state, thereby forming a tight connection between the connecting pipe 20 and the step portion 100.

[0051] It is understandable that a protrusion 25 and a concave portion 102 of corresponding shape are respectively provided at the end face of the connection between the connecting pipe 20 and the step portion 100. The rubber pad 4 is disposed between the protrusion 25 and the concave portion 102. The protrusion 25 and the concave portion 102 of corresponding shape can increase the connection area between the connecting pipe 20 and the step portion 100, so that the rubber pad 4 can be more closely connected to the end face of the connecting pipe 20 and the step portion 100, thereby improving the sealing performance of the cylinder body 1.

[0052] Meanwhile, in this embodiment, such as Figure 3 As shown, to facilitate the installation of the filter assembly 2 within the oil inlet 10, a drive unit 24 is extended at its end. By rotating the drive unit 24, the filter assembly 2 can rotate within the oil inlet 10, achieving frictional self-locking with the second groove section 1011. Furthermore, to facilitate the connection between the cylinder body 1 and the external oil pipe, a connecting part 11 is provided on the cylinder body 1. The external oil pipe can be threaded into the connecting part 11 for a fixed connection. Simultaneously, the drive unit 24 extends from the connecting part 11, allowing the filter assembly 2 to be connected to the stepped section 100 by driving the drive unit 24.

[0053] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder, characterized in that, include: The cylinder body and the filter assembly are provided; the cylinder body is provided with an oil inlet, and the filter assembly is installed at the oil inlet via a quick-release structure. The quick-release structure is adapted to axially lock the filter assembly; The inner wall of the oil inlet is provided with a stepped portion; the filter assembly and the stepped portion are connected by the quick-release structure, so that the filter assembly is tightly attached to the stepped portion; The filter assembly includes a connecting pipe and a groove disposed on the outer wall of the connecting pipe, and a protrusion is provided on the inner wall of the stepped portion; The connecting pipe is adapted to carry the axially horizontally arranged slide groove in the oil inlet, and to make the slide groove and the protrusion cooperate to form the quick-release structure; The filter assembly includes a connecting pipe and a protrusion disposed on the outer wall of the connecting pipe. The inner wall of the stepped portion is provided with a sliding groove. The connecting pipe is adapted to carry the protrusion and is axially and horizontally disposed in the oil inlet, so that the protrusion and the sliding groove cooperate to form the quick-release structure.

2. The hydraulic cylinder as described in claim 1, characterized in that: The slide groove includes a first groove segment and a second groove segment; when the connecting pipe and the step portion are connected, the connecting pipe is adapted to be inserted into the step portion and rotate, and the protrusion is adapted to slide along the first groove segment and the second groove segment of the slide groove successively.

3. A hydraulic cylinder as described in claim 2, characterized in that: The second groove is inclined; or the second groove is spirally arranged; when the protrusion rotates in the second groove, it is adapted to generate frictional self-locking with the second groove.

4. A hydraulic cylinder as described in claim 1, characterized in that: The filter assembly also includes a filter screen; the filter screen is fixedly connected to the inner wall of the connecting pipe.

5. A hydraulic cylinder as described in any one of claims 1-4, characterized in that: A rubber pad is provided between the connecting pipe and the step portion. When the connecting pipe and the step portion are connected, the rubber pad is in a compressed state so that a tight connection is formed between the connecting pipe and the step portion.

6. A hydraulic cylinder as described in claim 5, characterized in that: The end faces of the connection between the connecting pipe and the stepped portion are respectively a protruding portion and a concave portion with corresponding shapes, and the rubber pad is disposed between the protruding portion and the concave portion.

7. A hydraulic cylinder as described in claim 1, characterized in that: A connecting part is provided on the outer side of the oil inlet of the cylinder body; a driving part is provided at the end of the connecting pipe; the driving part extends out of the connecting part.

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