Small-space double-oil-cylinder structure
By processing the through cavity and blind cavity in the metal cylinder and using the design of sealing ring and piston rod, the cost and sealing problems of laying dual cylinder cavity in small spaces are solved, and efficient transformation is achieved without changing the position of the cylinder block.
Patent Information
- Application Number
- CN202423075956.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-12-13
AI Technical Summary
When adding a cylinder cavity to a hydraulic cylinder in a small space, it is difficult for the prior art to modify without changing the position of the cylinder block and oil connection port, and it is expensive.
The through cavity and the blind cavity are processed in an integrated metal cylinder. The axis of the two overlaps partially, adopts a step hole design, and the sealing properties of the cylinder cavity are achieved through the cooperation of the sealing ring and the piston rod.
Two oil cylinder chambers are arranged in a cramped space to control costs, ensure oil sealing, and achieve normal operation of the oil cylinder by refining the shape and sealing structure of the oil cylinder.
Smart Images
Figure CN223089671U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of hydraulic cylinders, and particularly relates to a double hydraulic cylinder structure in a small space. Background Art
[0002] At present, an additional hydraulic cylinder needs to be installed beside the existing hydraulic cylinder, but the space is very cramped, and the positions of the existing cylinder body and the oil receiving port are restricted and cannot be easily moved or changed. The cost of a major modification to the entire hydraulic cylinder is too high, so a solution has to be found on the hydraulic cylinder body. Content of the Utility Model
[0003] The problem to be solved by the utility model is to provide a double hydraulic cylinder structure in a small space. Machining is carried out on an integral metal cylinder body, and two hydraulic cylinder chambers are arranged in the cramped space, making them close enough to each other. Arranging two hydraulic cylinder chambers in a small space controls the cost and is a suitable modification.
[0004] To solve the above problems, the utility model provides a double hydraulic cylinder structure in a small space. To achieve the above object, the technical solution adopted by the utility model to solve its technical problems is:
[0005] A double hydraulic cylinder structure in a small space, comprising: a cylinder body with a hollow hydraulic cylinder chamber dug inside, the hydraulic cylinder chamber including a through cavity and a blind cavity, the axes of the through cavity and the blind cavity being parallel to each other; a piston rod movably assembled in the hydraulic cylinder chamber; a sealing ring provided at the opening of the hydraulic cylinder chamber; the hydraulic cylinder chamber is a stepped hole with locally unequal inner diameters, and there is a partial overlap in the axial projection of the through cavity and the blind cavity; the surface of the sealing ring has a circumferential groove, the circumferential groove includes an outer groove located on the outer ring of the sealing ring and also includes an inner groove located on the inner ring of the sealing ring, the opening of the outer groove contacts the inner wall of the hydraulic cylinder chamber, and the opening of the inner groove contacts the outer wall of the piston rod.
[0006] The beneficial effect of adopting the above technical solution is: This technical solution makes an improved machining on an integral metal cylinder body, and arranges two hydraulic cylinder chambers, namely a through cavity and a blind cavity, in the cramped space. In order to make them close enough to each other, it is set that there is a partial overlap in their axial projections. However, because both the through cavity and the blind cavity are stepped holes, in fact, the through cavity and the blind cavity are not directly connected, but only a part of the hydraulic cylinder chamber with a relatively thick inner diameter is close to another hydraulic cylinder chamber with a relatively thin inner diameter. Arranging two hydraulic cylinder chambers in a small space controls the cost and is a suitable modification. In addition, the inner groove and the outer groove work together to ensure the oil tightness.
[0007] As a further improvement of the utility model, the sealing ring further includes an exposed section located outside the hydraulic cylinder chamber.
[0008] The beneficial effect of adopting the above technical solution is: The exposed section of the sealing ring plays a certain buffering and protecting effect.
[0009] As a further improvement of the present utility model, according to different inner diameters, the through cavity sequentially includes a first cavity section, a second cavity section, a third cavity section, and a fourth cavity section along the axis in one direction, and the blind cavity sequentially includes a fifth cavity section, a sixth cavity section, and a seventh cavity section along the axis in one direction; the inner diameters of the fourth cavity section, the third cavity section, the first cavity section, and the second cavity section gradually decrease, and the inner diameters of the fifth cavity section, the sixth cavity section, and the seventh cavity section gradually decrease; the axial projection of the fifth cavity section partially overlaps with the third cavity section and the fourth cavity section.
[0010] The beneficial effect of adopting the above technical solution is: the shape of the stepped hole of the oil cylinder cavity is refined.
[0011] As a further improvement of the present utility model, the axial projections of the inner wall cross-sections of the third cavity section and the sixth cavity section form two mutually externally tangent circles.
[0012] The beneficial effect of adopting the above technical solution is: it is convenient to accurately control the radial distance between the two oil cylinder cavities.
[0013] As a further improvement of the present utility model, the sealing ring includes a first sealing ring and a second sealing ring respectively located in the through cavity and the blind cavity; the first sealing ring is in contact with the inner walls of the first cavity section and the second cavity section respectively, and the second sealing ring is in contact with the inner walls of the fifth cavity section and the sixth cavity section respectively.
[0014] The beneficial effect of adopting the above technical solution is: the axial distance of the sealing ring is relatively long, ensuring the sealing performance of the oil fluid.
[0015] As a further improvement of the present utility model, the inner groove of the first sealing ring is located in the first cavity section, the outer groove of the first sealing ring is located in the second cavity section, the inner groove of the second sealing ring is located in the fifth cavity section and the sixth cavity section, and the outer groove of the second sealing ring is located in the sixth cavity section.
[0016] The beneficial effect of adopting the above technical solution is: the outer contour of the sealing ring is similar to a stepped shaft, which fits with the stepped hole in a concave-convex manner.
[0017] As a further improvement of the present utility model, there are several outer grooves and inner grooves for each sealing ring.
[0018] The beneficial effect of adopting the above technical solution is: several outer grooves and inner grooves can form a multi-channel sealing structure.
[0019] As a further improvement of the present utility model, the piston rod includes a first piston rod and a second piston rod respectively located in the through cavity and the blind cavity. One end of each of the first piston rod and the second piston rod radially protrudes to form an expansion section. The expansion section is in sliding contact with the inner wall of the oil cylinder cavity. The expansion section of the first piston rod can move within the third cavity section, and the expansion section of the second piston rod can move within the sixth cavity section.
[0020] The beneficial effects of adopting the above technical solution are as follows: Only the movement of one section of the smooth hole in the piston rod is utilized, without being affected by the inner diameters of different sections of the stepped hole.
[0021] As a further improvement of the present utility model, a plug is assembled in the fourth cavity section of the through cavity.
[0022] The beneficial effects of adopting the above technical solution are as follows: One end of the through cavity is sealed by the plug, with only one end exposed, achieving an effect equivalent to that of a blind cavity.
[0023] As a further improvement of the present utility model, the sealing ring is made of rubber.
[0024] The beneficial effects of adopting the above technical solution are as follows: The rubber material has sufficient elasticity and sealing performance. Description of the Drawings
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0026] Figure 1 It is the front view of the cylinder block in one embodiment of the present utility model;
[0027] Figure 2 It is the A-A cross-sectional view of the cylinder block in one embodiment of the present utility model;
[0028] Figure 3 It is the B-B cross-sectional view of the cylinder block in one embodiment of the present utility model;
[0029] Figure 4 It is the top view of the cylinder block in one embodiment of the present utility model;
[0030] Figure 5 It is the C-C cross-sectional view of the cylinder block in one embodiment of the present utility model;
[0031] Figure 6 It is the D-D cross-sectional view of the cylinder block in one embodiment of the present utility model;
[0032] Figure 7 It is the three-dimensional view of the cylinder block in one embodiment of the present utility model;
[0033] Figure 8 It is the three-dimensional view of the cylinder block in one embodiment of the present utility model;
[0034] Figure 9It is the front view of an embodiment of the present utility model;
[0035] Figure 10 It is the sectional view taken along the line E-E of an embodiment of the present utility model;
[0036] Figure 11 It is the sectional view taken along the line F-F of an embodiment of the present utility model;
[0037] Figure 12 It is the top view of an embodiment of the present utility model;
[0038] Figure 13 It is the sectional view taken along the line G-G of an embodiment of the present utility model;
[0039] Figure 14 It is the perspective view of an embodiment of the present utility model;
[0040] Figure 15 It is the exploded view of an embodiment of the present utility model.
[0041] 1 - First access port; 2 - Second access port; 3 - Third access port; 4 - Fourth access port; 5 - First adapter; 6 - Second adapter; 7 - Third adapter; 8 - Fourth adapter; 9 - Fifth adapter; 10 - Through cavity; 101 - First cavity section; 102 - Second cavity section; 103 - Third cavity section; 104 - Fourth cavity section; 11 - Blind cavity; 111 - Fifth cavity section; 112 - Sixth cavity section; 113 - Seventh cavity section; 12 - Flange; 13 - Fixing hole; 14 - First radial channel; 15 - Second radial channel; 16 - Third radial channel; 17 - Fourth radial channel; 18 - First axial channel; 19 - Second axial channel; 20 - Third axial channel; 21 - First piston rod; 22 - Second piston rod; 23 - First sealing ring; 24 - Second sealing ring; 25 - Expansion section; 26 - Inner groove; 27 - Outer groove; 28 - Exposed section; 29 - Plugging head. Specific embodiments
[0042] The following combines specific embodiments to further elaborate on the content of the present utility model:
[0043] To achieve the object of the present utility model, a double-cylinder structure for a small space includes: a cylinder block with a hollow oil cylinder cavity dug inside. The oil cylinder cavity includes a through cavity 10 and a blind cavity 11, and the axes of the through cavity 10 and the blind cavity 11 are parallel to each other; a piston rod movably assembled in the oil cylinder cavity; a sealing ring provided at the opening of the oil cylinder cavity; the oil cylinder cavity is a stepped hole with unequal inner diameters in part, and there is partial overlap in the axial projection of the through cavity 10 and the blind cavity 11; the surface of the sealing ring has a circumferential groove, and the circumferential groove includes an outer groove 27 located on the outer ring of the sealing ring and an inner groove 26 located on the inner ring of the sealing ring. The opening of the outer groove 27 contacts the inner wall of the oil cylinder cavity, and the opening of the inner groove 26 contacts the outer wall of the piston rod.
[0044] The beneficial effects of adopting the above technical solution are as follows: In this technical solution, improved machining is carried out on an integral metal cylinder block, and two oil cylinder cavities, namely a through cavity and a blind cavity, are arranged in a cramped space. In order to make the two close enough, it is set that there is partial overlap in the axial projection of their axes. However, because both the through cavity and the blind cavity are stepped holes, in fact, the through cavity and the blind cavity are not directly connected, but only a part of the oil cylinder cavity with a relatively thick inner diameter is close to another oil cylinder cavity with a relatively thin inner diameter. Arranging two oil cylinder cavities in a small space controls the cost and is a suitable transformation. In addition, the inner groove and the outer groove work together to ensure the sealing of the oil fluid.
[0045] In some other embodiments of the present utility model, the sealing ring further includes an exposed section 28 located outside the oil cylinder cavity.
[0046] The beneficial effects of adopting the above technical solution are as follows: The exposed section of the sealing ring plays a certain buffering and protecting effect.
[0047] In some other embodiments of the present utility model, according to different inner diameters, the through cavity 10 sequentially includes a first cavity section 101, a second cavity section 102, a third cavity section 103, and a fourth cavity section 104 along the axis in one direction, and the blind cavity 11 sequentially includes a fifth cavity section 111, a sixth cavity section 112, and a seventh cavity section 113 along the axis in one direction; the inner diameters of the fourth cavity section 104, the third cavity section 103, the first cavity section 101, and the second cavity section 102 gradually decrease, and the inner diameters of the fifth cavity section 111, the sixth cavity section 112, and the seventh cavity section 113 gradually decrease; the axial projection of the fifth cavity section 111 along the axis partially overlaps with the third cavity section 103 and the fourth cavity section 104.
[0048] The beneficial effects of adopting the above technical solution are as follows: The shape of the stepped hole of the oil cylinder cavity is refined.
[0049] In some other embodiments of the present utility model, the axial projections of the cross-sections of the inner walls of the third cavity section 103 and the sixth cavity section 112 form two mutually externally tangent circles.
[0050] The beneficial effects of adopting the above technical solution are as follows: it is convenient to accurately control the radial distance between the two oil cylinder chambers.
[0051] In some other embodiments of the present invention, the sealing ring includes a first sealing ring 23 and a second sealing ring 24 respectively located in the through cavity 10 and the blind cavity 11; the first sealing ring 23 contacts the inner walls of the first cavity section 101 and the second cavity section 102 respectively, and the second sealing ring 24 contacts the inner walls of the fifth cavity section 111 and the sixth cavity section 112 respectively.
[0052] The beneficial effects of adopting the above technical solution are as follows: the axial distance of the sealing ring is relatively long, ensuring the sealing of the oil fluid.
[0053] In some other embodiments of the present invention, the inner groove 26 of the first sealing ring 23 is located in the first cavity section 101, the outer groove 27 of the first sealing ring 23 is located in the second cavity section 102, the inner groove 26 of the second sealing ring 24 is located in the fifth cavity section 111 and the sixth cavity section 112, and the outer groove 27 of the second sealing ring 24 is located in the sixth cavity section 112.
[0054] The beneficial effects of adopting the above technical solution are as follows: the outer contour of the sealing ring is similar to a stepped shaft, which fits with the stepped hole in a concave-convex manner.
[0055] In some other embodiments of the present invention, there are several outer grooves 27 and inner grooves 26 for each sealing ring.
[0056] The beneficial effects of adopting the above technical solution are as follows: several outer grooves and inner grooves can form a multi-channel sealing structure.
[0057] In some other embodiments of the present invention, the piston rod includes a first piston rod 21 and a second piston rod 22 respectively located in the through cavity 10 and the blind cavity 11. One end of each of the first piston rod 21 and the second piston rod 22 radially protrudes to form an expansion section 25. The expansion section 25 is in sliding contact with the inner wall of the oil cylinder chamber. The expansion section 25 of the first piston rod 21 can move in the third cavity section 103, and the expansion section 25 of the second piston rod 22 can move in the sixth cavity section 112.
[0058] The beneficial effects of adopting the above technical solution are as follows: only the movement of one section of the smooth hole in the piston rod is utilized, without being affected by the inner diameters of different sections of the stepped hole.
[0059] In some other embodiments of the present invention, a plug 29 is assembled in the fourth cavity section 104 of the through cavity 10.
[0060] The beneficial effects of adopting the above technical solution are as follows: the plug seals one end of the through cavity, only exposing one end, achieving an effect equivalent to that of the blind cavity.
[0061] In some other embodiments of the present utility model, the sealing ring is made of rubber.
[0062] The beneficial effects of adopting the above technical solution are as follows: The rubber material has sufficient elasticity and sealing performance.
[0063] The cylinder block is a hydraulic cylinder block with multiple oil holes, including: an oil cylinder cavity, which includes a hollow through cavity 10 and a blind cavity 11 located inside the cylinder block; an access port, which is recessed on the side surface of the cylinder block, and the access port can allow hydraulic oil to enter the cylinder block; a transfer port, which is recessed on the side surface, top surface or bottom surface of the cylinder block, and the transfer port can allow hydraulic oil to enter and exit the cylinder block; a connecting channel, which includes a radial channel and an axial channel. The axial channel is parallel to the axis of the oil cylinder cavity, and the radial channel is vertically connected to the axial channel; the radial channel connects the access port or the transfer port to the oil cylinder cavity; one end of the axial channel is connected to the transfer port on the top surface or bottom surface of the cylinder block.
[0064] The beneficial effects of adopting the above technical solution are as follows: Without changing the position of the specified external oil hole access port, multiple oil circuits are made so that the internal access port is in the correct position, and then it is convenient to block the access port to ensure the normal operation of the oil cylinder. The oil cylinder cavity is equivalent to the cylinder block of the hydraulic cylinder, and it can work with the piston rod. The access port is convenient for the pressure hydraulic oil to enter from the outside. The transfer port is convenient for transferring the hydraulic oil to other equipment and facilitating the flow of the hydraulic oil. The radial channel and the axial channel further enrich the oil circuit. The transfer ports located at different positions such as the side surface, top surface or bottom surface are also convenient for the cylinder block to be directly connected to external equipment at different positions, avoiding the bending of the external oil pipes. This application mainly further processes various holes on the existing integral metal cylinder block to enrich its oil circuit. It is a further modification of the existing equipment and a modification that controls the cost.
[0065] In some other embodiments of the present utility model, the access port includes a first access port 1, a second access port 2, a third access port 3, and a fourth access port 4; the transfer port includes a first transfer port 5, a second transfer port 6, a third transfer port 7, a fourth transfer port 8, and a fifth transfer port 9; the first transfer port 5, the third transfer port 7, and the fourth transfer port 8 are located on the side surface of the cylinder block, and the second transfer port 6 and the fifth transfer port 9 are located on the bottom surface of the cylinder block.
[0066] The beneficial effects of adopting the above technical solution are as follows: The access port and the transfer port are refined.
[0067] In some other embodiments of the present utility model, the radial channel includes a first radial channel 14, a second radial channel 15, a third radial channel 16, and a fourth radial channel 17; the axial channel includes a first axial channel 18, a second axial channel 19, and a third axial channel 20.
[0068] The beneficial effects of adopting the above technical solution are as follows: The radial channel and the axial channel are refined.
[0069] In some other embodiments of the present utility model, the first access port 1 communicates with the blind cavity 11 through the first radial channel 14; the first adapter 5 communicates with the blind cavity 11 through the second radial channel 15; the second access port 2 communicates with the second adapter 6 through the first axial channel 18; the third adapter 7 communicates with the through cavity 10 through the third radial channel 16; the fourth adapter 8 communicates with the through cavity 10 through the fourth radial channel 17; the fourth radial channel 17 communicates with the fifth adapter 9 through the third axial channel 20.
[0070] The beneficial effects of adopting the above technical solution are as follows: In addition to directly doing work on the piston rod in the cylinder body, the incoming hydraulic oil also divides a part to other external devices.
[0071] In some other embodiments of the present utility model, the second radial channel 15 and the first axial channel 18 are in a cross shape; the third radial channel 16 and the second axial channel 19 are in a cross shape; the fourth radial channel 17 and the third axial channel 20 are in a T-shaped intersection.
[0072] The beneficial effects of adopting the above technical solution are as follows: The cross shape is equivalent to having four subdivided oil circuits, and the T-shaped intersection is equivalent to having three subdivided oil circuits.
[0073] In some other embodiments of the present utility model, the inner diameter of the adapter is smaller than the inner diameter of the access port.
[0074] The beneficial effects of adopting the above technical solution are as follows: The large inner diameter of the access port ensures the flow rate of the oil when it enters.
[0075] In some other embodiments of the present utility model, the inner diameter of the connecting channel is smaller than the inner diameter of the adapter, and the inner diameters of the radial channel and the axial channel are equal.
[0076] The beneficial effects of adopting the above technical solution are as follows: The radial channel and the axial channel have the same thickness, ensuring the uniformity of the internal oil circuit.
[0077] In some other embodiments of the present utility model, the access port is a countersunk hole.
[0078] The beneficial effects of adopting the above technical solution are as follows: The countersunk hole is convenient for processing and facilitates the smooth connection between the access port and the radial channel.
[0079] The above embodiments are only used to illustrate the technical concept and characteristics of the present utility model, and their purpose is to enable those who are familiar with this technology to understand the content of the present utility model and implement it. It cannot be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit and essence of the present utility model should be covered within the protection scope of the present utility model.
Claims
1. A double-oil cylinder structure for a small space, characterized in that, Comprising: A cylinder block, with a hollow oil cylinder cavity dug inside. The oil cylinder cavity includes a through cavity and a blind cavity, and the axes of the through cavity and the blind cavity are parallel to each other; A piston rod, with the piston rod movably assembled in the oil cylinder cavity; A sealing ring, with a sealing ring provided at the opening of the oil cylinder cavity; The oil cylinder cavity is a stepped hole with unequal inner diameters in part, and there is partial overlap in the axial projection of the through cavity and the blind cavity; The surface of the sealing ring has a circumferential groove. The circumferential groove includes an outer groove located on the outer ring of the sealing ring and also includes an inner groove located on the inner ring of the sealing ring. The opening of the outer groove contacts the inner wall of the oil cylinder cavity, and the opening of the inner groove contacts the outer wall of the piston rod.
2. The double-cylinder structure for a small space according to claim 1, wherein: The sealing ring further includes an exposed section located outside the oil cylinder cavity.
3. The double-cylinder structure of a small space according to claim 1, characterized in that: According to different inner diameters, the through cavity sequentially includes a first cavity section, a second cavity section, a third cavity section, and a fourth cavity section along the axis in one direction. The blind cavity sequentially includes a fifth cavity section, a sixth cavity section, and a seventh cavity section along the axis in one direction; The inner diameters of the fourth cavity section, the third cavity section, the first cavity section, and the second cavity section gradually decrease, and the inner diameters of the fifth cavity section, the sixth cavity section, and the seventh cavity section gradually decrease; The axial projection of the fifth cavity section along the axis partially overlaps with the third cavity section and the fourth cavity section.
4. The double-cylinder structure for a small space according to claim 3, characterized in that: The axial projections of the cross-sections of the inner walls of the third cavity section and the sixth cavity section form two mutually externally tangent circles.
5. The double-cylinder structure for a small space according to claim 3, wherein: The sealing ring includes a first sealing ring and a second sealing ring respectively located in the through cavity and the blind cavity; The first sealing ring contacts the inner walls of the first cavity section and the second cavity section respectively, and the second sealing ring contacts the inner walls of the fifth cavity section and the sixth cavity section respectively.
6. The double-cylinder structure for a small space according to claim 5, characterized in that: The inner groove of the first sealing ring is located in the first cavity section, the outer groove of the first sealing ring is located in the second cavity section, the inner groove of the second sealing ring is located in the fifth cavity section and the sixth cavity section, and the outer groove of the second sealing ring is located in the sixth cavity section.
7. The double-oil cylinder structure for a small space according to claim 1, characterized in that: There are several outer grooves and inner grooves for each sealing ring.
8. The double-oil cylinder structure for a small space according to claim 3, characterized in that: The piston rod includes a first piston rod and a second piston rod respectively located in the through cavity and the blind cavity. One end of each of the first piston rod and the second piston rod radially protrudes outward to form an expansion section. The expansion section is in sliding contact with the inner wall of the oil cylinder cavity. The expansion section of the first piston rod can move in the third cavity section, and the expansion section of the second piston rod can move in the sixth cavity section.
9. The double-cylinder structure for a small space according to claim 3, wherein: A plug is assembled in the fourth cavity section of the through cavity.
10. The double-cylinder structure for a small space according to claim 1, characterized in that: The sealing ring is made of rubber material.