Adjustable gear rack swing hydraulic cylinder

Abstract

The utility model relates to the technical field of hydraulic cylinders, in particular to an adjustable gear and rack swing hydraulic cylinder which comprises a shell. The stroke distance needed by the movable push rod and the piston is calculated according to the actual situation, the lengthened barrel is pulled to slide on the outer side wall of the cylinder barrel, the rubber sealing rings are made of elastic materials and move on the outer side wall of the cylinder barrel along with the movement of the lengthened barrel, and the rubber sealing rings sequentially pass through the evenly-formed positioning grooves in the moving process, so that the movable push rod and the piston are fixed. When the space in the lengthened barrel is enough to push the piston and the push rod to move to a proper stroke distance, the rubber sealing ring is fastened in the positioning groove through the hoop plate, so that the cylinder barrel and the lengthened barrel form a sealing structure, hydraulic oil is input into the cylinder barrel to push the piston and the push rod to move, the push rod drives the rack to move, and the rack drives the gear to rotate; and the extending length of the lengthening cylinder can be adjusted according to different actual use scenes, the application range of the swing hydraulic cylinder is expanded, and the practicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to an adjustable gear rack swing hydraulic cylinder. Background Art

[0002] The rack and pinion swing hydraulic cylinder is a hydraulic actuator, which is mainly used in working occasions to realize reciprocating swing, indexing or intermittent motion. Its basic working principle is that the high-pressure liquid generated by the hydraulic cylinder pushes the piston rod to reciprocate, and the rack on the piston rod meshes with the gear, thereby driving the gear to rotate. The rotation of the gear is transmitted to the working part through the transmission mechanism to complete the required action;

[0003] During use, depending on the working scenario, sometimes the gear swings at a larger angle and the rack stroke is longer, requiring a longer cylinder, while sometimes the gear only needs to swing at a smaller angle and only a shorter cylinder is required. However, the cylinder lengths of some swing hydraulic cylinders on the market are fixed and cannot be adjusted, so their use is subject to certain restrictions. Therefore, an adjustable gear rack swing hydraulic cylinder is proposed. Utility Model Content

[0004] The utility model aims to provide an adjustable gear rack swing hydraulic cylinder to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adjustable gear rack swing hydraulic cylinder, comprising a housing, two cylinder barrels are symmetrically welded on the outer side wall of the housing, the cylinder barrels are communicated with the housing, the outer side wall of the cylinder barrel is slidably connected with an extension barrel, the outer side wall of the cylinder barrel is provided with two arc grooves, the inner side wall of the extension barrel is fixedly connected with two arc strips, the outer side wall of the arc strip is slidably connected with the inner side wall of the arc groove, a rubber sealing ring is fixedly connected on one side of the extension barrel close to the housing, positioning grooves are evenly provided on the outer side wall of the cylinder barrel, the lower surface of the rubber sealing ring is in close contact with the inner side wall of the positioning groove, two clamping plates are provided on the outer side wall of the rubber sealing ring, the clamping plates are in close contact with the outer side wall of the rubber sealing ring, a gear is rotatably connected to the rear surface of the inner side wall of the housing through a bearing, the inner side walls of the two cylinder barrels are movably connected with pistons, a push rod is fixedly connected between the two pistons, a rack is fixedly connected on the upper surface of the push rod, and the rack is meshed with the gear.

[0006] As a further preferred embodiment of the technical solution: the lower ends of the two clamp plates are hingedly connected, the upper ends of the two clamp plates are welded with connecting blocks, and the two connecting blocks are threadedly connected with the same fastening bolt.

[0007] As a further preferred embodiment of the present technical solution: a sealing gasket is fixedly connected to the outer side wall of the piston, and the outer side wall of the sealing gasket is in close contact with the inner side wall of the cylinder.

[0008] As a further preferred embodiment of the present technical solution: an end cover is welded on a side of the extension tube away from the shell.

[0009] As a further preferred embodiment of the present technical solution: the upper surface of the extension tube is connected to a hydraulic interface.

[0010] As a further preferred embodiment of the present technical solution: a cover plate is fixedly connected to the front surface of the shell.

[0011] As a further preferred embodiment of the technical solution: two fixing plates are fixedly connected between the rear surface of the inner wall of the shell and the cover plate, a guide groove is opened on the outer wall of the push rod, and the inner wall of the guide groove is slidably connected to the fixing plate.

[0012] As a further preferred embodiment of the present technical solution: a transmission shaft is fixedly connected to the front surface of the gear.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model calculates the required travel distance of the push rod and the piston according to actual conditions, and pulls the extension tube to slide on the outer wall of the cylinder; since the rubber sealing ring is made of elastic material, it also moves on the outer wall of the cylinder with the movement of the extension tube, and the rubber sealing ring passes through evenly arranged positioning grooves in sequence when moving; when the space in the extension tube is sufficient to push the piston and the push rod to move to a suitable travel distance, the rubber sealing ring is fastened in the positioning groove by a clamping plate, so that the cylinder and the extension tube form a sealing structure, and then hydraulic oil is input into the cylinder to push the piston and the push rod to move, the push rod drives the rack to move, and the rack drives the gear to rotate, so that the extended length of the extension tube can be adjusted according to different actual use scenarios, thereby expanding the application range of the swing hydraulic cylinder and making it more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0017] Figure 3 It is a schematic diagram of the internal structure of the housing in the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the cylinder in the utility model;

[0019] Figure 5This is a schematic diagram of the structure of the lengthened tube in the utility model;

[0020] Figure 6 It is a structural schematic diagram of the clamp plate in the utility model.

[0021] In the figure: 1. Shell; 2. Cylinder; 3. Extension cylinder; 4. Arc groove; 5. Arc strip; 6. Rubber sealing ring; 7. Positioning groove; 8. Clamp plate; 9. Gear; 10. Piston; 11. Push rod; 12. Rack; 13. Connecting block; 14. Fastening bolt; 15. Sealing gasket; 16. End cover; 17. Hydraulic interface; 18. Cover plate; 19. Fixing plate; 20. Guide groove; 21. Drive shaft. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limitations on the present application. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] See also Figure 1-6The utility model provides a technical solution: an adjustable gear rack swing hydraulic cylinder, comprising a shell 1, the outer wall of the shell 1 is symmetrically welded with two cylinder barrels 2, the cylinder barrel 2 is communicated with the shell 1, the outer wall of the cylinder barrel 2 is slidably connected with an extension barrel 3, the outer wall of the cylinder barrel 2 is provided with two arc grooves 4, the inner wall of the extension barrel 3 is fixedly connected with two arc strips 5, the outer wall of the arc strip 5 is slidably connected with the inner wall of the arc groove 4, the extension barrel 3 is fixedly connected with a rubber sealing ring 6 on the side close to the shell 1, the outer wall of the cylinder barrel 2 is evenly provided with positioning grooves 7, the lower surface of the rubber sealing ring 6 is in close contact with the inner wall of the positioning groove 7, the outer wall of the rubber sealing ring 6 is provided with two clamping plates 8, the clamping plate 8 is in close contact with the outer wall of the rubber sealing ring 6, and the rear surface of the inner wall of the shell 1 is rotatably connected with a gear 9 through a bearing. , the inner walls of the two cylinders 2 are movably connected with pistons 10, and a push rod 11 is fixedly connected between the two pistons 10. The upper surface of the push rod 11 is fixedly connected with a rack 12, and the rack 12 is meshed with the gear 9; first, the travel distance required by the movable push rod 11 and the piston 10 is calculated according to the actual situation, and the extension tube 3 is pulled to slide on the outer wall of the cylinder 2. Since the rubber sealing ring 6 is an elastic material, it also moves on the outer wall of the cylinder 2 with the movement of the extension tube 3. The rubber sealing ring 6 passes through the uniformly arranged positioning grooves 7 in sequence when moving. When the space in the extension tube 3 is sufficient to push the piston 10 and the push rod 11 to move to a suitable travel distance, the clamp plate 8 is used to fasten the rubber sealing ring 6 in the positioning groove 7, so that the cylinder 2 and the extension tube 3 form a sealing structure, and then the piston 10 and the push rod 11 are pushed to move by inputting hydraulic oil into the cylinder 2, the push rod 11 drives the rack 12 to move, and the rack 12 drives the gear 9 to rotate.

[0025] In this embodiment, specifically: the lower ends of the two clamp plates 8 are hingedly connected, the upper ends of the two clamp plates 8 are welded with connecting blocks 13, and the two connecting blocks 13 are threadedly connected with the same fastening bolt 14; which is used to fasten the rubber sealing ring 6 in the positioning groove 7.

[0026] In this embodiment, specifically: a sealing gasket 15 is fixedly connected to the outer wall of the piston 10, and the outer wall of the sealing gasket 15 is in close contact with the inner wall of the cylinder 2, thereby preventing the hydraulic oil from leaking from one side of the piston 10 to the other side.

[0027] In this embodiment, specifically: an end cover 16 is welded on a side of the extension tube 3 away from the shell 1 .

[0028] In this embodiment, specifically: the upper surface of the extension tube 3 is connected with a hydraulic interface 17 to facilitate the access of hydraulic oil.

[0029] In this embodiment, specifically: a cover plate 18 is fixedly connected to the front surface of the housing 1 .

[0030] In this embodiment, specifically: two fixing plates 19 are fixedly connected between the rear surface of the inner wall of the shell 1 and the cover plate 18, a guide groove 20 is opened on the outer wall of the push rod 11, and the inner wall of the guide groove 20 is slidably connected to the fixing plate 19.

[0031] In this embodiment, specifically: a transmission shaft 21 is fixedly connected to the front surface of the gear 9, which is used to connect the controlled working parts.

[0032] The working principle of the utility model is: first calculate the required travel distance of the push rod 11 and the piston 10 according to the actual situation, pull the extension tube 3 to slide on the outer wall of the cylinder 2, and because the rubber sealing ring 6 is an elastic material, it also moves on the outer wall of the cylinder 2 with the movement of the extension tube 3. When moving, the rubber sealing ring 6 passes through the evenly arranged positioning grooves 7 in sequence. When the space in the extension tube 3 is sufficient to push the piston 10 and the push rod 11 to move to a suitable travel distance, the clamp plate 8 is used to fasten the rubber sealing ring 6 in the positioning groove 7, so that the cylinder 2 and the extension tube 3 form a sealing structure, and then the piston 10 and the push rod 11 are pushed to move by inputting hydraulic oil into the cylinder 2, the push rod 11 drives the rack 12 to move, and the rack 12 drives the gear 9 to rotate, thereby forming an adjustable gear rack swing hydraulic cylinder, which can adjust the extended length of the extension tube 3 according to different actual usage scenarios, expands the application range of the swing hydraulic cylinder, and is more practical.

[0033] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable rack and pinion swing hydraulic cylinder, comprising a housing (1), characterized in that: Two cylinder barrels (2) are symmetrically welded to the outer wall of the shell (1). The cylinder barrels (2) are connected to the shell (1). The outer wall of the cylinder barrel (2) is slidably connected to an extension barrel (3). The outer wall of the cylinder barrel (2) is provided with two arc grooves (4). The inner wall of the extension barrel (3) is fixedly connected to two arc strips (5). The outer wall of the arc strip (5) is slidably connected to the inner wall of the arc groove (4). A rubber sealing ring (6) is fixedly connected to the side of the extension barrel (3) close to the shell (1). Positioning grooves (7) are evenly provided on the outer wall of the cylinder barrel (2). The lower surface of the sealing ring (6) is in close contact with the inner wall of the positioning groove (7); the outer wall of the rubber sealing ring (6) is provided with two clamping plates (8); the clamping plates (8) are in close contact with the outer wall of the rubber sealing ring (6); the rear surface of the inner wall of the housing (1) is rotatably connected to a gear (9) via a bearing; the inner walls of the two cylinder barrels (2) are movably connected to pistons (10); a push rod (11) is fixedly connected between the two pistons (10); a rack (12) is fixedly connected to the upper surface of the push rod (11); the rack (12) is meshingly connected to the gear (9).

2. The adjustable rack and pinion swing hydraulic cylinder according to claim 1, characterized in that: The lower ends of the two clamp plates (8) are hingedly connected, the upper ends of the two clamp plates (8) are welded with connecting blocks (13), and the two connecting blocks (13) are threadedly connected with the same fastening bolt (14).

3. The adjustable rack and pinion swing hydraulic cylinder according to claim 2, characterized in that: A sealing gasket (15) is fixedly connected to the outer side wall of the piston (10), and the outer side wall of the sealing gasket (15) is in close contact with the inner side wall of the cylinder (2).

4. The adjustable rack and pinion swing hydraulic cylinder according to claim 2, characterized in that: An end cover (16) is welded to a side of the extension tube (3) away from the shell (1).

5. The adjustable rack and pinion swing hydraulic cylinder according to claim 2, characterized in that: The upper surface of the extension tube (3) is connected to a hydraulic interface (17).

6. The adjustable rack and pinion swing hydraulic cylinder according to claim 2, characterized in that: A cover plate (18) is fixedly connected to the front surface of the housing (1).

7. The adjustable rack and pinion swing hydraulic cylinder according to claim 6, characterized in that: Two fixing plates (19) are fixedly connected between the rear surface of the inner wall of the shell (1) and the cover plate (18), and a guide groove (20) is provided on the outer wall of the push rod (11), and the inner wall of the guide groove (20) is slidably connected to the fixing plate (19).

8. The adjustable rack and pinion swing hydraulic cylinder according to claim 6, characterized in that: The front surface of the gear (9) is fixedly connected with a transmission shaft (21).

Images