Spring hydraulic cylinder

Abstract

The utility model belongs to the technical field of hydraulic cylinders, and particularly relates to a spring hydraulic cylinder which comprises a rear end cover, a cylinder barrel, a piston rod, a piston and a front end cover, the rear end cover and the front end cover are sleeved at two ends of the cylinder barrel respectively, at least part of the piston rod is arranged in the cylinder barrel and can axially slide relative to the cylinder barrel, and the piston is sleeved at one end of the piston rod. The end, sleeved with the piston, of the piston rod is arranged in the cylinder barrel, the other end of the piston rod penetrates out of the front end cover and is sleeved with a first spring, and the first spring is located between the front end cover and the piston rod head. A plurality of fasteners are annularly arranged on the end face of the front end cover, the front end cover is fixedly connected with the cylinder barrel through the fasteners, and the adjacent fasteners are fixedly connected so as to prevent a single fastener from loosening. According to the spring hydraulic cylinder, the fasteners are fixedly connected together, so that the fasteners are prevented from rotating and loosening when the spring hydraulic cylinder is used, the workload of equipment maintenance and adjustment is reduced, and the operation stability of the hydraulic cylinder is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic cylinders, and in particular relates to a spring hydraulic cylinder. Background Art

[0002] Spring hydraulic cylinder is a common hydraulic transmission device, which has the advantages of simple structure, convenient operation and reliable operation, and is widely used in various industrial fields. Spring hydraulic cylinder is mainly composed of shell, piston, spring and hydraulic cylinder, and works through hydraulic principle.

[0003] When the spring hydraulic cylinder in the prior art is in use, the hydraulic cylinder is usually subjected to a large workload, and the connection method of the hydraulic cylinder usually adopts an ordinary bolt structure, which is easy to loosen when subjected to vibration and workload, resulting in equipment instability, increasing the workload of equipment maintenance and adjustment, wasting time and effort, and shortening the service life of the hydraulic cylinder. Utility Model Content

[0004] The utility model aims to provide a spring hydraulic cylinder to solve the technical problem that the hydraulic cylinder is prone to loosening when subjected to vibration and working load, resulting in equipment instability.

[0005] In order to solve the above technical problems, the utility model provides a spring hydraulic cylinder, which prevents the bolts from rotating and loosening during use by fixing them together with bolts, thereby reducing the workload of equipment maintenance and adjustment, increasing the stability of the hydraulic cylinder operation, and increasing the service life of the hydraulic cylinder.

[0006] The spring hydraulic cylinder of the utility model comprises: a rear end cover, a cylinder barrel, a piston rod, a piston and a front end cover, wherein the rear end cover and the front end cover are respectively sleeved at the two ends of the cylinder barrel, at least part of the piston rod is arranged in the cylinder barrel and can slide axially relative to the cylinder barrel, wherein the piston is sleeved at one end of the piston rod, the end of the piston rod sleeved with the piston is arranged in the cylinder barrel, the other end of the piston rod passes through the front end cover and is sleeved with a first spring, and the first spring is located between the front end cover and the piston rod head;

[0007] A plurality of fasteners are arranged on the end surface of the front end cover, and the front end cover is fixedly connected to the cylinder barrel through the plurality of fasteners. Adjacent fasteners are fixedly connected to each other to prevent a single fastener from loosening.

[0008] The spring hydraulic cylinder of the utility model connects a plurality of fasteners together. When a single fastener is loosened due to vibration, it is fixed together with other fasteners and is difficult to loosen, thereby increasing the stability of the hydraulic cylinder operation and the service life of the hydraulic cylinder.

[0009] Furthermore, in order to facilitate fixing and disassembly, the fasteners are bolts, several bolts are provided with sleeves, and adjacent sleeves are fixedly connected by connecting plates.

[0010] In order to facilitate further fixing of the bolts, a limiting block is fixedly provided in each of the sleeves, and the limiting block can be snapped onto the head of the corresponding bolt.

[0011] Furthermore, a fixing component is provided on the end surface of the front end cover, and the fixing component faces one of the connecting plates. A slot is provided on the connecting plate corresponding to the fixing component, and the fixing component can be snapped into the slot to limit the connecting plate.

[0012] In order to further fix and increase the fixing effect, two groups of fixing components are provided on the front end cover, and the fixing components are symmetrically arranged with the piston rod as the center.

[0013] Specifically, the fixing assembly includes: a fixing block, a pull rod, a second spring and a clamping block, the fixing block is fixedly connected to the front end cover, the fixing block has an accommodating cavity inside, the fixing block is provided with a first opening on a side perpendicular to the connecting plate, the accommodating cavity is connected to the first opening, and the fixing block is provided with a second opening on a side facing the connecting plate, the clamping block is arranged in the accommodating cavity, the clamping block can at least partially extend out of the second opening, the second spring is arranged between the clamping block and the inner wall of the fixing block, one end of the pull rod is fixedly arranged on the clamping block, and the other end of the pull rod extends out of the first opening, the pull rod can move closer to or away from the connecting plate in the first opening, and at the same time drive the clamping block to release or compress the second spring, so that the clamping block is clamped into the clamping groove of the corresponding connecting plate.

[0014] Furthermore, to facilitate installation, the card block is an L-shaped block, comprising a first connecting block and a second connecting block vertically connected, the first connecting block is arranged in the fixed block, the second connecting block partially extends out of the second opening, and the pull rod is fixedly arranged at the connection between the first connecting block and the second connecting block, and is perpendicular to the second connecting block.

[0015] Furthermore, in order to facilitate installation, a hexagonal groove is provided on the head of the bolt, and the limiting block is a hexagonal block.

[0016] Furthermore, in order to facilitate position limiting, a fixing ring is provided between the front end cover and the piston rod, and the first spring is provided between the fixing ring and the piston rod head.

[0017] Furthermore, in order to prevent the piston rod from sliding back too quickly and colliding with the hydraulic cylinder, a rubber pad is provided on the side of the fixing ring facing the first spring, and a limiting ring is provided on the side of the piston rod head facing the first spring.

[0018] The beneficial effects of the utility model are:

[0019] The spring hydraulic cylinder of the utility model fixes the cylinder barrel and the front end cover by bolts, and then sleeves are put on, and several sleeves are fixedly connected. The bolts are limited by the limit blocks in the sleeves to prevent the bolts from rotating and loosening during use. The clamping blocks of the fixing components cooperate with the clamping grooves on the connecting plate to fix several sleeves. The utility model is convenient to install and simple to operate, and the problem of bolt loosening caused by vibration and load generated when the hydraulic cylinder is working is prevented, thereby ensuring the firm connection of various parts of the equipment, improving the overall stability and reliability of the equipment, reducing the risk of failure and accidents caused by loose bolts, and improving the safety and use efficiency of the equipment.

[0020] With the cooperation of the rubber pad and the first spring, when the piston rod slides back in the hydraulic cylinder, the first spring can hold the limit ring and the rubber pad can provide protection to prevent the piston rod from sliding back too quickly and colliding with the hydraulic cylinder, thereby reducing the damage rate and increasing the service life of the hydraulic cylinder.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the overall structure of the spring hydraulic cylinder of the utility model;

[0024] Figure 2 It is an exploded view of the connection between the bolt and the sleeve of the spring hydraulic cylinder of the utility model;

[0025] Figure 3 It is an exploded view of the first spring connection of the spring hydraulic cylinder of the utility model;

[0026] Figure 4 It is a schematic diagram of the connection between the fixing assembly and the connecting plate of the spring hydraulic cylinder of the utility model;

[0027] Figure 5 This is an exploded view of the connection between the fixing assembly and the connecting plate of the spring hydraulic cylinder of the utility model.

[0028] In the figure:

[0029] 1. Rear end cover; 2. Cylinder; 3. Piston rod; 31. First spring; 32. Limiting ring; 5. Front end cover; 51. Bolt; 52. Sleeve; 53. Limiting block; 54. Connecting plate; 541. Slot; 55. Fixing assembly; 551. Fixing block; 552. Pull rod; 553. Second spring; 554. Block; 5541. First connecting block; 5542. Second connecting block; 555. First opening; 556. Second opening; 6. Fixing ring; 61. Rubber pad. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] like Figures 1 to 5 As shown, it is the best embodiment of the utility model. The utility model provides a spring hydraulic cylinder, including:

[0032] The rear end cover 1, the cylinder 2, the piston rod 3, the piston (not shown) and the front end cover 5 are respectively sleeved on both ends of the cylinder 2, and at least part of the piston rod 3 is arranged in the cylinder 2 and can slide axially relative to the cylinder 2. The piston is sleeved on one end of the piston rod 3, and the end of the piston rod 3 sleeved with the piston is arranged in the cylinder 2. The other end of the piston rod 3 passes through the front end cover 5 and is sleeved with a first spring 31, and the first spring 31 is located between the front end cover 5 and the rod head of the piston rod 3;

[0033] A plurality of fasteners are arranged around the end surface of the front end cover 5, and the front end cover 5 is fixedly connected to the cylinder barrel 2 through the plurality of fasteners. At the same time, adjacent fasteners are fixedly connected to prevent the fasteners from loosening.

[0034] The spring hydraulic cylinder of the utility model connects a plurality of fasteners together. When a single fastener is loosened due to vibration, it is fixed together with other fasteners and is difficult to loosen, thereby increasing the stability of the hydraulic cylinder operation and the service life of the hydraulic cylinder.

[0035] To connect several fasteners together, such as Figure 2As shown, the fastener is a bolt 51, and the front cover 5 is fixedly connected to the cylinder barrel 2 through a plurality of bolts 51, and sleeves 52 are provided on the plurality of bolts 51, and a limit block 53 is fixedly provided in the plurality of sleeves 52, and the limit block 53 can be clamped to the head of the corresponding bolt 51, and the plurality of sleeves 52 are connected in sequence, so that the plurality of limit blocks 53 can match the corresponding bolt 51. More specifically, the adjacent sleeves 52 are respectively fixedly connected in sequence through the connecting plates 54, and the head of the bolt 51 is provided with a hexagonal groove, and the limit block 53 is a hexagonal block, and by sleeve 52 being sleeved on the corresponding bolt 51, the hexagonal block in the sleeve 52 is clamped in the hexagonal groove of the head of the bolt 51. The plurality of sleeves 52 are fixedly connected through the plurality of connecting plates 54, so that the plurality of fasteners are fixedly connected together, and all the bolts 51 can be fixed at the same time, so that a single bolt 51 is difficult to loosen, and the stability of the connection between the cylinder barrel 2 and the front cover 5 is ensured.

[0036] A fixing assembly 55 is also provided on the end surface of the front cover 5. The fixing assembly 55 faces one of the connecting plates 54. A slot 541 is provided on the connecting plate 54 corresponding to the fixing assembly 55. The fixing assembly 55 can be snapped into the slot 541 to limit the position of the connecting plate 54. More specifically, two groups of fixing assemblies 55 are provided on the front cover 5. The two groups of fixing assemblies 55 are symmetrically arranged with the piston rod 3 as the center. The connecting plate 54 is limited by the fixing assembly 55, which further prevents the plurality of bolts 51 from rotating and loosening, thereby increasing the stability of the device.

[0037] like Figure 4 and Figure 5 As shown, the fixing assembly 55 includes: a fixing block 551, a pull rod 552, a second spring 553 and a clamping block 554. The fixing block 551 is fixedly connected to the front cover 5. The fixing block 551 has an accommodating cavity inside. The fixing block 551 is provided with a first opening 555 on one side perpendicular to the connecting plate 54. The accommodating cavity is connected to the first opening 555. The clamping block 554 is arranged in the accommodating cavity. One end of the pull rod 552 extends out of the first opening 555. The second spring 553 is arranged between the inner wall of the fixing block 551 and the clamping block 554, so that when the pull rod 552 is pulled, the clamping block 554 can move closer to or away from the connecting plate 54 along the first opening 555. More specifically, the fixing block 551 is provided with a second opening 556 on one side facing the connecting plate 54. The clamping block 554 is fixedly connected to the pull rod 552. At least part of the clamping block 554 can extend out of the second opening 556 and be clamped into the corresponding clamping groove 541 of the connecting plate 54.

[0038] By cooperating the clamping block 554 of the fixing assembly 55 with the clamping groove 541 on the connecting plate 54, a plurality of sleeves 52 can be fixed, which is convenient to install and simple to operate, and prevents the problem of bolt loosening caused by vibration and load generated when the hydraulic cylinder is working, thereby ensuring the firm connection of various components of the equipment.

[0039] More specifically, to facilitate installation, the clamping block 554 is an L-shaped block, including a first connecting block 5541 and a second connecting block 5542 that are vertically connected. The first connecting block 5541 is arranged in the fixed block 551, and the second connecting block 5542 partially extends out of the second opening 556. The pull rod 552 is fixed at the connection between the first connecting block 5541 and the second connecting block 5542, and is perpendicular to the second connecting block 5542. By clamping the first connecting block 5541 in the fixed block 551, the second connecting block 5542 can be prevented from extending excessively out of the second opening 556.

[0040] like Figure 3 As shown, a fixing ring 6 is further provided between the front end cover 5 and the piston rod 3, a first spring 31 is arranged between the fixing ring 6 and the rod head of the piston rod 3, a rubber pad 61 is provided on the side of the fixing ring 6 facing the first spring 31, and a limiting ring 32 is provided on the side of the rod head of the piston rod 3 facing the first spring 31. Under the cooperation of the rubber pad 61 and the first spring 31, when the piston rod 3 slides back in the hydraulic cylinder, the first spring 31 can resist the limiting ring 32 to limit the first spring 31; and the rubber pad 61 is used for protection to prevent the piston rod 3 from sliding back too fast and colliding with the hydraulic cylinder, thereby reducing the damage rate and increasing the service life of the hydraulic cylinder.

[0041] The working principle of the utility model is as follows:

[0042] When in use, firstly, the cylinder 2 and the front cover 5 are fixed by a plurality of bolts 51, and then the plurality of bolts 51 are fixed. Specifically, a plurality of sleeves 52 are respectively sleeved on the corresponding bolts 51, and the plurality of sleeves 52 are connected by the connecting plate 54, and the hexagonal block in the sleeve 52 is clamped in the hexagonal groove of the head of the bolt 51, so as to further limit the connecting plate 54. The normal state of the fixing assembly 55 is that the second spring 553 is in an uncompressed state, at which time, the push rod 552 is moved along the first opening 555 in a direction away from the front cover 5, so that the clamping block 554 partially extends out of the second opening 556 and is clamped in the clamping groove 541 of the connecting plate 54; when the connecting plate 54 needs to be disassembled, the push rod 552 is moved along the first opening 555 in a direction close to the front cover 5, the second spring 553 is compressed, and the clamping block 554 is moved in a direction away from the clamping groove 541, so as to cancel the limit on the connecting plate 54. The whole device is easy to install and operate, and prevents the problem of the bolt 51 being loosened due to vibration and load generated when the hydraulic cylinder is working. In addition, under the cooperation of the rubber pad 61 and the first spring 31, when the piston rod 3 slides back in the hydraulic cylinder, the first spring 31 can resist the limit ring 32 to limit the first spring 31; and the rubber pad 61 is used for protection to prevent the piston rod 3 from sliding back too fast and colliding with the hydraulic cylinder, thereby reducing the damage rate and increasing the service life of the hydraulic cylinder.

[0043] The various devices selected in this application are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0044] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0046] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A spring hydraulic cylinder, characterized in that: include: A rear end cover (1), a cylinder barrel (2), a piston rod (3), a piston and a front end cover (5), wherein the rear end cover (1) and the front end cover (5) are respectively sleeved on the two ends of the cylinder barrel (2), at least a portion of the piston rod (3) is arranged in the cylinder barrel (2) and can slide axially relative to the cylinder barrel (2), wherein the piston is sleeved on one end of the piston rod (3), the end of the piston rod (3) sleeved with the piston is arranged in the cylinder barrel (2), the other end of the piston rod (3) passes through the front end cover (5) and is sleeved with a first spring (31), and the first spring (31) is located between the front end cover (5) and the rod head of the piston rod (3); A plurality of fasteners are arranged on the end surface of the front end cover (5), and the front end cover (5) is fixedly connected to the cylinder barrel (2) via the plurality of fasteners. Adjacent fasteners are fixedly connected to each other to prevent a single fastener from loosening.

2. The spring hydraulic cylinder according to claim 1, characterized in that: The fasteners are bolts (51), a plurality of bolts (51) are each provided with a sleeve (52), and adjacent sleeves (52) are fixedly connected via a connecting plate (54).

3. The spring hydraulic cylinder according to claim 2, characterized in that: A plurality of sleeves (52) are each fixedly provided with a limit block (53), and the limit block (53) can be clamped to the head of a corresponding bolt (51).

4. The spring hydraulic cylinder according to claim 3, characterized in that: A fixing component (55) is also provided on the end surface of the front end cover (5), and the fixing component (55) faces one of the connecting plates (54). A clamping groove (541) is provided on the connecting plate (54) corresponding to the fixing component (55), and the fixing component (55) can be clamped into the clamping groove (541) to limit the position of the connecting plate (54).

5. The spring hydraulic cylinder according to claim 4, characterized in that: The front end cover (5) is provided with two groups of fixing components (55), and the fixing components (55) are symmetrically arranged with the piston rod (3) as the center.

6. The spring hydraulic cylinder according to claim 4, characterized in that: The fixing assembly (55) comprises: a fixing block (551), a pull rod (552), a second spring (553) and a clamping block (554); the fixing block (551) is fixedly connected to the front end cover (5); a receiving cavity is provided inside the fixing block (551); a first opening (555) is provided on a side of the fixing block (551) perpendicular to the connecting plate (54); the receiving cavity is connected to the first opening (555); a second opening (556) is provided on a side of the fixing block (551) facing the connecting plate (54); the clamping block (554) is arranged in the receiving cavity; the clamping block (554) is at least partially The second opening (556) can be extended out, the second spring (553) is arranged between the inner wall of the block (554) and the fixed block (551), one end of the pull rod (552) is fixedly arranged on the block (554), and the other end of the pull rod (552) extends out of the first opening (555), and the pull rod (552) can move closer to or away from the connecting plate (54) in the first opening (555), and at the same time drive the block (554) to release or compress the second spring (553), so that the block (554) is connected to the slot (541) of the corresponding connecting plate (54).

7. The spring hydraulic cylinder according to claim 6, characterized in that: The clamping block (554) is an L-shaped block, comprising a first connecting block (5541) and a second connecting block (5542) which are vertically connected, wherein the first connecting block (5541) is arranged in the fixed block (551), and the second connecting block (5542) partially extends out of the second opening (556), and the pull rod (552) is fixedly arranged at the connection between the first connecting block (5541) and the second connecting block (5542), and is perpendicular to the second connecting block (5542).

8. The spring hydraulic cylinder according to claim 3, characterized in that: The head of the bolt (51) is provided with a hexagonal groove, and the limiting block (53) is a hexagonal block.

9. The spring hydraulic cylinder according to claim 1, characterized in that: A fixing ring (6) is also provided between the front end cover (5) and the piston rod (3), and the first spring (31) is arranged between the fixing ring (6) and the rod head of the piston rod (3).

10. The spring hydraulic cylinder according to claim 9, characterized in that: A rubber pad (61) is provided on the side of the fixing ring (6) facing the first spring (31), and a limiting ring (32) is provided on the side of the rod head of the piston rod (3) facing the first spring (31).

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