Multi-stage hydraulic cylinder

Abstract

The utility model discloses a multi-stage hydraulic cylinder, which belongs to the field of hydraulic cylinders, and adopts the technical scheme that the multi-stage hydraulic cylinder comprises a body mechanism, the inner end of the body mechanism is connected with a protection mechanism in a sliding manner, the rear part of the protection mechanism is connected with a connecting mechanism in a sliding manner, and the protection mechanism comprises a piston I; assembling grooves which are symmetrically distributed are formed in the inner end of the first piston, round sealing pieces are installed at the inner ends of the assembling grooves, and buffer springs which are evenly distributed are movably connected to the rear portion of the first piston; according to the multistage hydraulic cylinder, leakage of hydraulic oil between the first piston and the hydraulic rod can be avoided by arranging the circular sealing piece, when the hydraulic cylinder operates, the buffer spring buffers acting force firstly, the acting force is transmitted to the buffer rod, the buffer rod transmits the acting force to the buffer plate for multistage buffer protection, the multistage hydraulic cylinder operates more stably, and the service life of the hydraulic cylinder is prolonged. Damage to the cylinder body due to long-time acting force is avoided, and the operation effect of the multi-stage hydraulic cylinder is improved.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic cylinders, in particular to a multi-stage hydraulic cylinder. Background Art

[0002] The hydraulic cylinder is one of the commonly used components in mechanical transmission work. The main function of the hydraulic cylinder is to convert hydraulic energy into mechanical energy and perform linear reciprocating motion or swinging motion. The normal operation of the hydraulic cylinder is very important.

[0003] China Patent Authorization Application Number: CN202022875988.X provides a new double-acting multi-stage hydraulic cylinder. This solution uses the designed second liquid inlet and hydraulic push rod to lift the second-stage cylinder body through the first liquid inlet when in use, and drive the hydraulic push rod through the second liquid inlet to lift the third cylinder body. When in use, it can be lifted quickly in both directions, so that the hydraulic cylinder can operate more efficiently and quickly complete the conversion of driving loads.

[0004] Existing hydraulic cylinders have certain disadvantages when in use. First, in order to buffer the damage of the hydraulic rod to the cylinder body, a certain buffer protection component is set inside the hydraulic cylinder. However, a single buffer component cannot effectively buffer the force under long-term action, resulting in a reduced service life of the hydraulic cylinder. For this reason, we propose a multi-stage hydraulic cylinder. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a multi-stage hydraulic cylinder. By arranging a circular seal and a buffer block, the circular seal can prevent the hydraulic oil between the piston and the hydraulic rod from leaking, and when the hydraulic cylinder is running, the buffer spring first buffers the force, and the force is transmitted to the buffer rod, and the buffer rod transmits the force to the buffer plate for multi-stage buffering protection, so that the operation of the multi-stage hydraulic cylinder is more stable, avoiding damage to the cylinder body caused by long-term force, and improving the operation effect of the multi-stage hydraulic cylinder.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A multi-stage hydraulic cylinder comprises a main body mechanism, an inner end of the main body mechanism is slidably connected to a protection mechanism, and a rear end of the protection mechanism is slidably connected to a connection mechanism;

[0008] The protective mechanism includes a piston 1, the inner end of which is provided with symmetrically distributed assembly grooves, the inner ends of which are each installed with a circular seal, the rear of the piston 1 is movably connected with a uniformly distributed buffer spring, the rear end of the buffer spring is installed with a buffer block, and the rear end of the buffer block is installed with a guide ring.

[0009] By installing circular seals and buffer blocks, the multi-stage hydraulic cylinder can operate more stably, avoiding damage to the cylinder body caused by long-term force, and improving the operating effect of the multi-stage hydraulic cylinder.

[0010] Furthermore, a buffer rod is installed at the rear end of the guide ring, a buffer ring is sleeved on the outer end of the buffer rod, and a buffer groove is opened at the outer end of the buffer ring.

[0011] By installing the guide ring, the buffer structure of the hydraulic cylinder can operate more stably.

[0012] Furthermore, a limiting block is installed at the rear end of the buffer rod, and the buffer groove is located at the inner end of the main body mechanism.

[0013] By installing the buffer groove and cooperating with the guide ring, the buffer rod and the buffer block can further make the buffering more stable, and the buffering effect of the multi-stage hydraulic cylinder can be further enhanced.

[0014] Furthermore, the main body mechanism includes a hydraulic rod, the outer end of the hydraulic rod is slidably connected to a sleeve block, and the outer end of the sleeve block is mounted with a cylinder body.

[0015] By installing the sleeve, the hydraulic rod can run more stably without deviation.

[0016] Furthermore, the inner end of the cylinder body is slidably connected to a piston rod 1, the outer end of the hydraulic rod is sleeved with a sealing ring 1, and the outer end of the piston rod 1 is sleeved with a sealing ring 2.

[0017] By installing the second sealing ring, the second sealing ring cooperates with the first sealing ring to further enhance the sealing effect of the hydraulic cylinder and further prevent hydraulic oil leakage.

[0018] Furthermore, a buffer plate is movably connected to the rear of the second sealing ring, and evenly distributed conductive blocks are installed at the front end of the buffer plate.

[0019] By installing the buffer plate, it is ensured that the hydraulic cylinder has a multi-structure buffer effect.

[0020] Furthermore, a second spring is installed at the rear end of the buffer plate, the second spring is evenly distributed, and a protective rod is installed on the inner side of the second spring.

[0021] By installing spring 2 and a protection rod, the protection and buffering effect of the hydraulic cylinder can be further increased.

[0022] Furthermore, the protection rod is located at the rear end of the buffer plate, and a connecting ring is installed at the rear end of the protection rod.

[0023] By installing the connecting ring, the connecting ring can limit the buffering protection rod, preventing the protection rod from buffering too much and increasing the buffering effect of the protection rod.

[0024] In summary, the present invention has the following beneficial effects:

[0025] 1. By providing a circular seal and a buffer block, the circular seal can prevent the hydraulic oil between the piston and the hydraulic rod from leaking. When the hydraulic cylinder is running, the buffer spring first buffers the force, which is then transmitted to the buffer rod. The buffer rod then transmits the force to the buffer plate for multi-stage buffering protection, making the operation of the multi-stage hydraulic cylinder more stable, avoiding damage to the cylinder body caused by long-term force, and improving the operating effect of the multi-stage hydraulic cylinder.

[0026] 2. By setting up the buffer groove and cooperating with the guide ring, the buffer rod and buffer block can be further stabilized to perform buffering, and the buffering effect of the multi-stage hydraulic cylinder can be further enhanced;

[0027] 3. By setting up spring 2 and the protective rod, when the buffer plate performs secondary buffering transmission, spring 2 cooperates with the protective rod to buffer the force, so that the protective buffering effect of the hydraulic cylinder is further enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the overall structure of this embodiment;

[0029] Figure 2 Schematic diagram of the structure of the protective mechanism plane in this embodiment;

[0030] Figure 3 In this embodiment Figure 2 A schematic diagram of the structure with an enlarged plane at point A;

[0031] Figure 4 In this embodiment Figure 2 The structural diagram of the plane at B is enlarged;

[0032] Figure 5 Schematic diagram of the structure of the circular sealing element in the plane of this embodiment.

[0033] In the figure, 1. Main body mechanism; 101. Hydraulic rod; 102. Bushing block; 103. Cylinder body; 104. Piston rod 1; 105. Sealing ring 1; 106. Sealing ring 2; 2. Protective mechanism; 201. Piston 1; 202. Assembly groove; 203. Circular seal; 204. Buffer spring; 205. Buffer block; 206. Guide ring; 207. Buffer rod; 208. Buffer ring; 209. Buffer groove; 210. Limiting block; 3. Connecting mechanism; 301. Buffer plate; 302. Conducting block; 303. Spring 2; 304. Protective rod; 305. Connecting ring. DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below with reference to the accompanying drawings.

[0035] Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0036] Reference Figure 1-5 As shown in the figure, a multi-stage hydraulic cylinder in a preferred embodiment of the present utility model comprises a main body mechanism 1, the inner end of the main body mechanism 1 is slidably connected to a protective mechanism 2, and the rear end of the protective mechanism 2 is slidably connected to a connecting mechanism 3;

[0037] The protective mechanism 2 includes a piston 201, the inner end of which is provided with symmetrically distributed assembly grooves 202, the inner ends of which are each provided with a circular seal 203, and the rear of the piston 201 is movably connected with a uniformly distributed buffer spring 204, the rear end of which is provided with a buffer block 205, and the rear end of the buffer block 205 is provided with a guide ring 206.

[0038] Reference Figure 2-3 As shown, further, a buffer rod 207 is installed at the rear end of the guide ring 206, a buffer ring 208 is sleeved on the outer end of the buffer rod 207, and a buffer groove 209 is opened at the outer end of the buffer ring 208.

[0039] Reference Figure 3 As shown, further, a limiting block 210 is installed at the rear end of the buffer rod 207, and the buffer groove 209 is located at the inner end of the main body mechanism 1.

[0040] By installing the circular seal 203, the sealing effect of the piston 201 can be increased, so that the hydraulic oil between the piston 201 and the hydraulic rod 101 can be prevented from leaking, and when the hydraulic cylinder is running, the buffer spring 204 will first buffer the force, and the buffer spring 204 will drive the buffer block 205 to buffer. At this time, the buffered buffer block 205 will transmit the force to the buffer rod 207 again, and the buffer rod 207 will transmit the force to the buffer plate 301 for multi-level buffering protection. The buffer groove 209 cooperates with the guide ring 206 to further make the buffer rod 207 and the buffer block 205 buffer more stably.

[0041] Reference Figure 1 As shown, further, the main body mechanism 1 includes a hydraulic rod 101 , the outer end of the hydraulic rod 101 is slidably connected to a sleeve block 102 , and the outer end of the sleeve block 102 is mounted with a cylinder body 103 .

[0042] Reference Figure 1-2As shown, further, the inner end of the cylinder body 103 is slidably connected to the piston rod 104, the outer end of the hydraulic rod 101 is provided with a sealing ring 105, and the outer end of the piston rod 104 is provided with a sealing ring 2 106.

[0043] By installing the second sealing ring 106 in conjunction with the first sealing ring 105, the sealing effect of the hydraulic cylinder can be further increased, thereby further preventing leakage of hydraulic oil.

[0044] Reference Figure 2 and Figure 5 As shown, further, a buffer plate 301 is movably connected to the rear of the second sealing ring 106 , and evenly distributed conductive blocks 302 are installed at the front end of the buffer plate 301 .

[0045] Reference Figure 5 As shown, further, a second spring 303 is installed at the rear end of the buffer plate 301 , the second spring 303 is evenly distributed, and a protective rod 304 is installed on the inner side of the second spring 303 .

[0046] Reference Figure 5 As shown, further, the protection rod 304 is located at the rear end of the buffer plate 301 , and a connecting ring 305 is installed at the rear end of the protection rod 304 .

[0047] By installing multiple conduction blocks 302 on the outer end of the buffer plate 301, the buffering force of the protective mechanism 2 can be effectively taken over, ensuring that the hydraulic cylinder has a multi-structure buffering effect. When the buffer plate 301 performs secondary buffering transmission, the spring 2 303 cooperates with the protective rod 304 to buffer the force, further increasing the protective buffering effect of the hydraulic cylinder.

[0048] Specific implementation process: When the hydraulic cylinder is in use, the buffer spring 204 first buffers the force, and the buffer spring 204 drives the buffer block 205 to buffer. The buffer groove 209 cooperates with the guide ring 206 to further allow the buffer rod 207 and the buffer block 205 to buffer more stably. At this time, the buffered buffer block 205 will transmit the force to the buffer rod 207 again, and the buffer rod 207 will transmit the force to the buffer plate 301. A plurality of conduction blocks 302 are installed at the outer end of the buffer plate 301, which can effectively undertake the force buffered by the protective mechanism 2. When the buffer plate 301 performs secondary buffering transmission, the spring 2 303 cooperates with the protective rod 304 to buffer the force, so that the protective buffering effect of the hydraulic cylinder is further increased.

[0049] Furthermore, the circular seal 203 can enhance the sealing effect of the piston 1 201 , thereby preventing the hydraulic oil between the piston 1 201 and the hydraulic rod 101 from leaking.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage hydraulic cylinder, characterized in that: It comprises a main body mechanism (1), the inner end of the main body mechanism (1) is slidably connected to a protective mechanism (2), and the rear end of the protective mechanism (2) is slidably connected to a connecting mechanism (3); The protection mechanism (2) comprises a piston (201), the inner end of the piston (201) is provided with symmetrically distributed assembly grooves (202), the inner ends of the assembly grooves (202) are each installed with a circular seal (203), the rear of the piston (201) is movably connected with a uniformly distributed buffer spring (204), the rear end of the buffer spring (204) is installed with a buffer block (205), and the rear end of the buffer block (205) is installed with a guide ring (206).

2. A multi-stage hydraulic cylinder according to claim 1, characterized in that: A buffer rod (207) is installed at the rear end of the guide ring (206), a buffer ring (208) is sleeved on the outer end of the buffer rod (207), and a buffer groove (209) is opened at the outer end of the buffer ring (208).

3. A multi-stage hydraulic cylinder according to claim 2, characterized in that: A limiting block (210) is installed at the rear end of the buffer rod (207), and the buffer groove (209) is located at the inner end of the main body mechanism (1).

4. The multi-stage hydraulic cylinder according to claim 1, characterized in that: The main body mechanism (1) comprises a hydraulic rod (101), the outer end of the hydraulic rod (101) is slidably connected to a sleeve block (102), and the outer end of the sleeve block (102) is mounted with a cylinder body (103).

5. The multi-stage hydraulic cylinder according to claim 4, characterized in that: The inner end of the cylinder body (103) is slidably connected to a piston rod 1 (104), the outer end of the hydraulic rod (101) is sleeved with a sealing ring 1 (105), and the outer end of the piston rod 1 (104) is sleeved with a sealing ring 2 (106).

6. The multi-stage hydraulic cylinder according to claim 5, characterized in that: The rear of the second sealing ring (106) is movably connected to a buffer plate (301), and the front end of the buffer plate (301) is equipped with evenly distributed conductive blocks (302).

7. The multi-stage hydraulic cylinder according to claim 6, characterized in that: A second spring (303) is installed at the rear end of the buffer plate (301), and the second spring (303) is evenly distributed. A protective rod (304) is installed on the inner side of the second spring (303).

8. The multi-stage hydraulic cylinder according to claim 7, characterized in that: The protection rod (304) is located at the rear end of the buffer plate (301), and a connecting ring (305) is installed at the rear end of the protection rod (304).

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