Split type hydraulic actuating device

Abstract

The utility model discloses a split type hydraulic actuating device which comprises a cylinder body, a piston, a first cylinder sleeve, a second cylinder sleeve, an end cover and a toothed bar, the first cylinder sleeve and the second cylinder sleeve are oppositely arranged at the two ends of the cylinder body, a through hole communicated with the first cylinder sleeve and the second cylinder sleeve is transversely formed in the cylinder body, the piston is arranged in the through hole, and the end cover is arranged on the toothed bar. The piston is arranged in the cylinder body, the two ends of the piston extend into the first cylinder sleeve and the second cylinder sleeve respectively, the end covers are arranged at the outer ends of the first cylinder sleeve and the second cylinder sleeve, screws which penetrate through the corresponding first cylinder sleeve or the second cylinder sleeve and are connected with the cylinder body are arranged in the end covers, and a rack extending in the axial direction of the piston is arranged on one side of the piston in a concave mode. The toothed bar perpendicularly intersects with the piston, the top end of the toothed bar extends to the outer side of the cylinder body, and a circle of gear teeth meshed with the rack are arranged on the toothed bar. By means of the mode, the split type hydraulic actuating device ensures the stroke of the piston and the number of rotation turns of the toothed bar, and reduces the machining cost of the cylinder body.

Description

Technical Field

[0001] The utility model relates to the field of electromechanics, and particularly to a split hydraulic actuator. Background Art

[0002] In order to realize the automatic control of a valve, a hydraulic actuator can be installed, and the hydraulic actuator is controlled by a hydraulic circuit, so as to drive the opening and closing of the valve.

[0003] The hydraulic actuator generally includes a cylinder block, a piston and a rack. The reciprocating rotation of the rack is carried out through the movement of the piston, and the forward and reverse rotation of the valve stem in the valve is driven to perform the action of the valve. In order to ensure the rotation stroke of the valve stem, the movement stroke of the piston is relatively large. Therefore, the length dimension of the cylinder block is relatively large, and the material and processing costs are relatively high, which needs to be improved. Summary of the Utility Model

[0004] The main technical problem to be solved by the utility model is to provide a split hydraulic actuator, which reduces the length and processing cost of the cylinder block and ensures the convenience of disassembly, assembly and maintenance.

[0005] To solve the above technical problem, a technical solution adopted by the utility model is: to provide a split hydraulic actuator, including: a cylinder block, a piston, a first cylinder sleeve, a second cylinder sleeve, an end cover and a rack. The first cylinder sleeve and the second cylinder sleeve are oppositely arranged at both ends of the cylinder block. A through hole communicating the first cylinder sleeve and the second cylinder sleeve is horizontally arranged in the cylinder block. The piston is arranged in the through hole, and both ends of the piston respectively extend into the first cylinder sleeve and the second cylinder sleeve. The end cover is arranged at the outer ends of the first cylinder sleeve and the second cylinder sleeve. Screws penetrating the corresponding first cylinder sleeve or second cylinder sleeve and connected to the cylinder block are arranged in the end cover. A rack extending along the axial direction of the piston is concavely arranged on one side of the piston. The rack is arranged in the cylinder block, is vertically crossed with the piston and the top end extends outside the cylinder block. A circle of teeth meshing with the rack is arranged on the rack. A first flow channel communicating the outer end of the inner cavity of the first cylinder sleeve with the inner end face of the first cylinder sleeve is arranged in the inner wall of the first cylinder sleeve. A second flow channel communicating the outer end of the inner cavity of the second cylinder sleeve with the inner end face of the second cylinder sleeve is arranged in the inner wall of the second cylinder sleeve. A third flow channel communicating the first flow channel with the outer side face of the cylinder block and a fourth flow channel communicating the second flow channel with the outer side face of the cylinder block are arranged in the inner wall of the cylinder block.

[0006] In a preferred embodiment of the utility model, a mounting hole corresponding to the rack is arranged in the cylinder block, and a top cover located at the top end of the mounting hole and a bottom cover located at the bottom end of the mounting hole are arranged on the cylinder block.

[0007] In a preferred embodiment of the utility model, the top end of the rack penetrates the top cover and extends above the top cover.

[0008] In a preferred embodiment of the present utility model, a threaded hole pointing to the piston is provided in the end cover, and an adjusting plug pointing to the piston is provided in the threaded hole.

[0009] In a preferred embodiment of the present utility model, several first pin holes are respectively and spacedly provided on the inner end faces of the first cylinder liner and the second cylinder liner, second pin holes corresponding to the first pin holes one by one are provided at both ends of the cylinder block, and positioning pins extending into the second pin holes are provided in the first pin holes.

[0010] In a preferred embodiment of the present utility model, a first sealing ring and a guide band are respectively provided at both ends of the outer circumference of the piston.

[0011] In a preferred embodiment of the present utility model, first annular grooves corresponding to the first sealing ring and the guide band one by one are concavely provided on the outer circumference of the piston.

[0012] In a preferred embodiment of the present utility model, second annular grooves are respectively provided at both ends of the through hole, inserting sleeves extending into the corresponding second annular grooves are respectively provided at the inner ends of the first cylinder liner and the second cylinder liner, and a second sealing ring is provided at the top of the inserting sleeve.

[0013] The beneficial effects of the present utility model are as follows: A split hydraulic actuator device pointed out by the present utility model, the first cylinder liner, the second cylinder liner and the cylinder block adopt a split structure, the two ends of the cylinder block are extended through the first cylinder liner and the second cylinder liner, ensuring the stroke of the piston and the number of rotation circles of the rack, the assembled structure is stable, the disassembly, assembly and maintenance are relatively convenient, and the size of the cylinder block is controlled, which is beneficial to reducing the raw material size and cost of the cylinder block. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings, where:

[0015] Figure 1 is a schematic structural diagram of a preferred embodiment of a split hydraulic actuator device of the present utility model;

[0016] Figure 2 is Figure 1 the sectional view taken along the line A-A of

[0017] Figure 3 is Figure 1 the perspective view of Detailed Embodiments

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than 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 efforts shall fall within the protection scope of the present utility model.

[0019] Please refer to Figures 1 to 3 , the embodiments of the present utility model include:

[0020] As Figures 1 to 3 shown, the split hydraulic actuator includes: cylinder block 1, piston 8, first cylinder sleeve 7, second cylinder sleeve 2, end cover 3 and rack 5. The first cylinder sleeve 7 and the second cylinder sleeve 2 are relatively arranged at both ends of the cylinder block 1, the end cover 3 is arranged at the outer ends of the first cylinder sleeve 7 and the second cylinder sleeve 2, and screws 4 penetrating through the corresponding first cylinder sleeve 7 or second cylinder sleeve 2 and connected to the cylinder block 1 are arranged in the end cover 3, which is convenient for assembly, has a firm structure, and avoids loosening problems.

[0021] As Figure 2 shown, second ring grooves 12 are respectively arranged at both ends of the through hole, and inserting sleeves 17 extending to the corresponding second ring grooves are respectively arranged at the inner ends of the first cylinder sleeve 7 and the second cylinder sleeve 2, which is convenient for assembly and has good bending resistance. A second sealing ring 18 is arranged at the top of the inserting sleeve 17 to seal the connection. In addition, several first pin holes 11 are respectively arranged at intervals on the inner end faces of the first cylinder sleeve 7 and the second cylinder sleeve 2, second pin holes 25 corresponding to the first pin holes 11 are arranged at both ends of the cylinder block 1, and positioning pins 15 extending to the second pin holes 25 are arranged in the first pin holes 11 to realize the positioning of the first cylinder sleeve 7 and the second cylinder sleeve 2 at both ends of the cylinder block 1 and ensure the concentricity after assembly.

[0022] A through hole communicating the first cylinder sleeve 7 and the second cylinder sleeve 2 is horizontally arranged in the cylinder block 1, the piston 8 is arranged in the through hole, and both ends of the piston 8 respectively extend into the first cylinder sleeve 7 and the second cylinder sleeve 2. The first cylinder sleeve 7 and the second cylinder sleeve 2 are used to extend both ends of the cylinder block 1, ensuring the stroke of the piston 8, controlling the size of the cylinder block, and being beneficial to reducing the raw material size and processing cost of the cylinder block 1.

[0023] As Figure 2 shown, a rack 19 extending along its axial direction is concavely arranged on one side of the piston 8, the rack 5 is arranged in the cylinder block 1, the rack 5 is vertically crossed with the piston 8 and the top end extends to the outside of the cylinder block 1. In this embodiment, an installation hole 24 corresponding to the rack 5 is arranged in the cylinder block 1, which is convenient for assembly. A top cover 6 is arranged at the top end of the installation hole 24 on the cylinder block 1 and a bottom cover 8 is arranged at the bottom end of the installation hole 24. The top cover 6 and the bottom cover 8 can be fixed on the cylinder block 1 through corresponding screws. The top end of the rack 5 penetrates through the top cover 6 and extends above the top cover 6, which is convenient for driving the valve.

[0024] A circle of teeth 21 meshing with the rack 19 is provided on the rack bar 5. The rack 19 and the piston 8 are of an integral structure. When the piston 8 moves axially forward and backward, the engagement between the rack 19 and the teeth 21 is utilized to achieve the counterclockwise or clockwise rotation of the rack bar 5.

[0025] A first flow channel 23 communicating the outer end of the inner cavity of the first cylinder liner 7 with the inner end face of the first cylinder liner 7 is provided in the inner wall of the first cylinder liner 7, and a second flow channel 16 communicating the outer end of the inner cavity of the second cylinder liner 2 with the inner end face of the second cylinder liner 2 is provided in the inner wall of the second cylinder liner 2, without the need to additionally increase an oil pipe. A third flow channel 22 communicating the first flow channel 23 with the outer side face of the cylinder block 1 and a fourth flow channel 20 communicating the second flow channel 16 with the outer side face of the cylinder block 1 are provided in the inner wall of the cylinder block 1, and the docking of the hydraulic oil circuit is completed during the assembly process, with simple operation.

[0026] As Figure 3 shown, a threaded hole 9 pointing to the piston 8 is provided in the end cover 3, and an adjusting plug 10 pointing to the piston 8 is provided in the threaded hole 9 to limit the stroke of the piston 8. The adjusting plug 10 can be rotated for axial adjustment, changing the stroke of the piston 8 and controlling the number of rotation turns of the rack bar 5, with flexible use.

[0027] A first sealing ring 13 and a guide strip 14 are respectively provided at both ends of the outer circumference of the piston 8 for sealing and guiding the piston 8. First annular grooves corresponding to the first sealing ring 13 and the guide strip 14 are concavely provided on the outer circumference of the piston 8, facilitating assembly. The guide strip 14 is made of wear-resistant and high-strength cloth phenolic material, with good guiding effect.

[0028] In summary, a split hydraulic actuator pointed out by the present utility model adopts a split assembly structure, which is convenient for assembly and reduces the processing and maintenance costs of the cylinder block.

[0029] The above are only embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A split type hydraulic actuator, characterized in that: include: A cylinder body, a piston, a first cylinder sleeve, a second cylinder sleeve, an end cover and a gear rod, wherein the first cylinder sleeve and the second cylinder sleeve are arranged at two ends of the cylinder body relatively, a through hole connecting the first cylinder sleeve and the second cylinder sleeve is arranged in the cylinder body transversely, the piston is arranged in the through hole, and the two ends of the piston extend into the first cylinder sleeve and the second cylinder sleeve respectively, the end cover is arranged at the outer ends of the first cylinder sleeve and the second cylinder sleeve, the end cover is arranged with a screw that penetrates the corresponding first cylinder sleeve or the second cylinder sleeve and is connected to the cylinder body, and a concave side of the piston is arranged with a A rack, wherein the rack rod is arranged in the cylinder body, the rack rod is vertically crossed with the piston and the top end extends to the outside of the cylinder body, the rack rod is provided with a circle of gear teeth meshing with the rack, a first flow channel connecting the outer end of the inner cavity of the first cylinder liner and the inner end surface of the first cylinder liner is arranged in the inner wall of the first cylinder liner, a second flow channel connecting the outer end of the inner cavity of the second cylinder liner and the inner end surface of the second cylinder liner is arranged in the inner wall of the second cylinder liner, a third flow channel connecting the first flow channel and the outer side surface of the cylinder body and a fourth flow channel connecting the second flow channel and the outer side surface of the cylinder body are arranged in the inner wall of the cylinder body.

2. The split type hydraulic actuator according to claim 1, characterized in that: The cylinder body is provided with a mounting hole corresponding to the gear rod, and the cylinder body is provided with a top cover located at the top end of the mounting hole and a bottom cover located at the bottom end of the mounting hole.

3. The split type hydraulic actuator according to claim 2, characterized in that: The top end of the gear rod passes through the top cover and extends to above the top cover.

4. The split type hydraulic actuator according to claim 1, characterized in that: The end cover is provided with a threaded hole pointing to the piston, and the threaded hole is provided with an adjusting screw plug pointing to the piston.

5. The split type hydraulic actuator according to claim 1, characterized in that: The inner end surfaces of the first cylinder sleeve and the second cylinder sleeve are respectively provided with a plurality of first pin holes at intervals, and the two ends of the cylinder body are provided with second pin holes corresponding to the first pin holes one by one, and the first pin holes are provided with positioning pins extending into the second pin holes.

6. The split type hydraulic actuator according to claim 1, characterized in that: The two ends of the outer circle of the piston are respectively provided with a first sealing ring and a guide belt.

7. The split type hydraulic actuator according to claim 1, characterized in that: The outer circle of the piston is concavely provided with a first ring groove corresponding to the first sealing ring and the guide belt one by one.

8. The split type hydraulic actuator according to claim 1, characterized in that: The two ends of the through hole are respectively provided with second annular grooves, the inner ends of the first cylinder sleeve and the second cylinder sleeve are respectively provided with plug sleeves extending into the corresponding second annular grooves, and the top of the plug sleeve is provided with a second sealing ring.

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