Electric cylinder with bidirectional buffering device

Abstract

The utility model discloses an electric cylinder with a bidirectional buffering device, and belongs to the technical field of hybrid power vehicles. Comprising an electric cylinder body, a bidirectional buffer and an energy accumulator, according to the bidirectional buffer, a cylinder body is provided with a second oil cavity connected to an energy accumulator; the second piston rod is cooperatively mounted in the second oil cavity of the cylinder body; the second piston rod is provided with a first oil cavity connected to an energy accumulator. The first piston rod is cooperatively mounted in the first oil cavity of the second piston rod; the second oil cavity, the first oil cavity and the energy accumulator are filled with hydraulic oil with certain pressure, and the pressure direction of the second oil cavity on the second piston rod is opposite to that of the first oil cavity on the first piston rod. The two-way buffering device is additionally arranged on the base portion of the electric cylinder, when the impact load of a system is suddenly increased, the buffering device firstly absorbs impact energy for buffering, impact on a lead screw thread and a bearing of the electric cylinder is reduced, and the service life of the electric cylinder is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hybrid vehicles, in particular to an electric cylinder with a bidirectional buffer device. Background Art

[0002] Electric cylinder systems are relatively simple and easy to deploy. They offer advantages such as high precision, long life, rapid response, low maintenance costs, and environmental friendliness, making them widely used in automation equipment. However, compared to hydraulic cylinders, electric cylinders have the disadvantage of withstanding smaller impact loads, making them suitable only for steady-state or low-impact load applications. Utility Model Content

[0003] The purpose of the utility model is to provide an electric cylinder with a bidirectional buffer device to improve the impact resistance of the electric cylinder and expand the adaptability of the electric cylinder.

[0004] The utility model adopts the following technical solution: an electric cylinder with a bidirectional buffer device, comprising an electric cylinder body and a bidirectional buffer fixed at one end of the electric cylinder body, wherein the bidirectional buffer is connected to an accumulator;

[0005] Wherein, the bidirectional buffer comprises:

[0006] The cylinder body has a second oil chamber; the second oil chamber is connected to the accumulator;

[0007] A second piston rod is fitted in the second oil chamber of the cylinder body; the second piston rod has a first oil chamber; the first oil chamber is connected to the accumulator;

[0008] a first piston rod, mounted in cooperation with the first oil chamber of the second piston rod;

[0009] The second oil chamber, the first oil chamber and the accumulator are filled with hydraulic oil with a certain pressure. The pressure direction of the hydraulic oil in the second oil chamber on the second piston rod is opposite to the pressure direction of the hydraulic oil in the first oil chamber on the first piston rod.

[0010] It is further provided that: the bidirectional buffer is fixed at the cylinder bottom end of the electric cylinder body.

[0011] The second piston rod, the first piston rod and the telescopic rod of the electric cylinder body are arranged coaxially.

[0012] The cylinder body comprises a first cylinder body, one end of the first cylinder body is open, and the other end of the first cylinder body is fixed with a first bottom cover;

[0013] A spacer sealing plate is fixed to the middle of the first cylinder, and a through hole for the second piston rod to pass through is opened at the center of the spacer sealing plate.

[0014] A connecting ear plate is fixed on the side surface of the first bottom cover.

[0015] The second piston rod includes a second piston slidably mounted in the first cylinder, and a second rod body slidably mounted in the through hole of the spacer sealing plate; the inner end of the second rod body is fixedly connected to the second piston, and the second oil chamber is between the second piston and the spacer sealing plate;

[0016] The outer end of the second rod is provided with a second cylinder;

[0017] The end of the second cylinder close to the first cylinder is slidably mounted in the first cylinder, and a second bottom cover is fixed to the end of the second cylinder close to the first cylinder, and the second bottom cover is fixedly connected to the outer end of the second rod;

[0018] A cover plate is fixed to one end of the second cylinder away from the first cylinder, and a through hole for the first piston rod to pass through is opened in the center of the cover plate.

[0019] The first piston rod includes a first piston slidably mounted in the second cylinder, and a first rod body slidably mounted in the through hole of the cover plate; the inner end of the first rod body is fixedly connected to the first piston, and the first oil chamber is between the first piston and the second bottom cover;

[0020] The outer end of the first rod is fixedly connected to the cylinder bottom end of the electric cylinder body through a flange.

[0021] The first oil chamber and the second oil chamber are both connected to the accumulator through a hydraulic oil pipe.

[0022] The beneficial effects of the present invention are as follows: a bidirectional buffer device is added to the base part of the electric cylinder, which is easy to match with the existing electric cylinder; when the impact load of the system suddenly becomes large, the buffer device first absorbs the impact energy and performs buffering, thereby reducing the impact on the screw thread and bearings of the electric cylinder, effectively reducing the impact of the impact load and increasing the service life of the electric cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic structural diagram of an electric cylinder with a bidirectional buffer device provided in an embodiment of the utility model.

[0025] Figure 2 This is an exploded view of the bidirectional buffer provided in an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1. Electric cylinder body;

[0028] 2. Bidirectional buffer;

[0029] 21. First piston rod; 211. First piston; 212. First rod body; 213. Flange;

[0030] 22. Second piston rod; 221. First oil chamber; 222. Second piston; 223. Second rod body; 224. Second cylinder; 225. Second bottom cover; 226. Cover plate;

[0031] 23. Cylinder body; 231. First cylinder; 232. Second oil chamber; 233. First bottom cover; 234. Spacer sealing plate; 235. Connecting ear plate;

[0032] 3. Accumulator; 31. Hydraulic oil pipe. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Example 1:

[0035] like Figure 1 As shown, the utility model provides an electric cylinder with a bidirectional buffer device, which mainly includes an electric cylinder body 1, a bidirectional buffer 2 and an accumulator 3.

[0036] The bidirectional buffer 2 includes a cylinder body 23 with a second oil chamber 232. The second piston rod 22 is mounted in the second oil chamber 232 of the cylinder body 23; the second piston rod 22 and the cylinder body 23 form a primary cylinder. A first oil chamber 221 is defined at the end of the second piston rod 22 away from the cylinder body 23. The first piston rod 21 is mounted in the first oil chamber 221 of the second piston rod 22; the first and second piston rods 21 and 22 form a secondary cylinder. The end of the first piston rod 21 is fixed to the bottom end of the electric cylinder body 1. The second piston rod 22 and the first piston rod 21 are coaxially arranged with the telescopic rod of the electric cylinder body 1.

[0037] During operation, the telescopic rod of the electric cylinder body 1 is connected to the component to be controlled, while the cylinder body 23 is relatively fixed. The first oil chamber 221 and the second oil chamber 232 are both connected to the accumulator 3 via a hydraulic oil pipe 31. The second oil chamber 232, the first oil chamber 221, and the accumulator 3 are filled with hydraulic oil at a certain pressure. The hydraulic oil in the second oil chamber 232 applies pressure to the second piston rod 22 in the opposite direction to the pressure applied by the hydraulic oil in the first oil chamber 221 on the first piston rod 21. The primary and secondary oil cylinders provide opposite buffering forces to the electric cylinder body 1, achieving a bidirectional buffering effect for the electric cylinder body 1.

[0038] Example 2:

[0039] Based on the above embodiment 1, combined with Figure 1 and Figure 2 As shown, this embodiment provides an implementation form of a cylinder body 23, a first piston rod 21 and a second piston rod 22.

[0040] The cylinder body 23 comprises a first cylindrical body 231, which is open on the left end and has a first bottom cover 233 fixed to the right end. A connecting lug 235 is fixed to the side of the first bottom cover 233 for secure connection to the base. A spacer cover 234 is fixed to the center of the inner wall of the first cylindrical body 231 and has a through hole in its center.

[0041] The second piston rod 22 includes a second piston 222, which is slidably mounted in the first cylinder 231. The second rod 223 slides through a through hole in the center of the spacer plate 234, and the inner end of the second rod 223 is fixedly connected to the second piston 222. A second oil chamber 232 is defined between the second piston 222 and the spacer plate 234. The hydraulic oil in the second oil chamber 232 provides the force for the second piston 222 to move rightward.

[0042] The outer end of the second rod body 223 is provided with a second cylinder body 224;

[0043] The right end of the second cylinder 224 is partially slidably mounted within the first cylinder 231. A second bottom cover 225 is secured to the right end of the second cylinder 224, and the outer end of the second rod 223 is fixedly connected to the center of the second bottom cover 225. A cover plate 226 is secured to the left end of the second cylinder 224, with a through hole defined in the center of the cover plate 226.

[0044] The first piston rod 21 includes a first piston 211, which is slidably mounted within the second cylinder 224. A first rod 212 slides through a through-hole in the center of the cover plate 226. The outer end of the first rod 212 is fixedly connected to the bottom end of the electric cylinder body 1 via a flange 213, while the inner end of the first rod 212 is fixedly connected to the first piston 211. A first oil chamber 221 is located between the first piston 211 and the second bottom cover 225. The hydraulic oil in the first oil chamber 221 provides a force for the first piston 211 to move leftward.

[0045] Working principle:

[0046] Combine Figure 1 and Figure 2 As shown, during operation, when the tension and compression loads on the electric cylinder body are less than the set value, the first oil chamber 221 and the second oil chamber 232 are filled with hydraulic oil and achieve balance. At this time, the first piston rod 21 and the second piston rod 22 are both in the initial position, and the electric cylinder can achieve precise transmission.

[0047] When the pressure load exceeds the set value, the first piston rod 21 moves to the right, and the hydraulic oil in the first oil chamber 221 is pressed toward the accumulator by the first piston 211, achieving buffering through throttling;

[0048] When the tensile load exceeds the set value, the first piston rod 21 and the second piston rod 22 move leftward as a whole, and the hydraulic oil in the second oil chamber 232 is pressed toward the accumulator by the second piston 222, achieving buffering through throttling;

[0049] When the impact load decreases below the set value to the working load, the first piston rod 21 and the second piston rod 22 return to their initial positions under the action of the accumulator 3 .

[0050] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. An electric cylinder with a bidirectional buffer device, characterized in that: It comprises an electric cylinder body (1) and a bidirectional buffer (2) fixed to one end of the electric cylinder body (1), wherein the bidirectional buffer (2) is connected to an accumulator (3); Wherein, the bidirectional buffer (2) comprises: The cylinder body (23) has a second oil chamber (232); the second oil chamber (232) is connected to the accumulator (3); A second piston rod (22) is mounted in a second oil chamber (232) of the cylinder body (23); the second piston rod (22) has a first oil chamber (221); the first oil chamber (221) is connected to the accumulator (3); A first piston rod (21) is mounted in a first oil chamber (221) of the second piston rod (22); The second oil chamber (232), the first oil chamber (221) and the accumulator (3) are filled with hydraulic oil having a certain pressure, and the pressure direction of the hydraulic oil in the second oil chamber (232) on the second piston rod (22) is opposite to the pressure direction of the hydraulic oil in the first oil chamber (221) on the first piston rod (21).

2. The electric cylinder with a bidirectional buffer device according to claim 1, characterized in that: The bidirectional buffer (2) is fixed to the bottom end of the electric cylinder body (1).

3. The electric cylinder with a bidirectional buffer device according to claim 2, characterized in that: The second piston rod (22), the first piston rod (21) and the telescopic rod of the electric cylinder body (1) are arranged coaxially.

4. The electric cylinder with a bidirectional buffer device according to claim 1, characterized in that: The cylinder body (23) includes a first cylinder body (231), one end of the first cylinder body (231) is open, and the other end of the first cylinder body (231) is fixed with a first bottom cover (233); A spacer sealing plate (234) is fixed in the middle of the first cylinder (231), and a through hole for the second piston rod (22) to pass through is provided in the center of the spacer sealing plate (234).

5. The electric cylinder with a bidirectional buffer device according to claim 4, characterized in that: A connecting ear plate (235) is fixed to the side of the first bottom cover (233).

6. The electric cylinder with a bidirectional buffer device according to claim 4, characterized in that: The second piston rod (22) comprises a second piston (222) slidably mounted in the first cylinder (231), and a second rod body (223) slidably mounted in the through hole of the spacing sealing plate (234); the inner end of the second rod body (223) is fixedly connected to the second piston (222), and the second oil chamber (232) is between the second piston (222) and the spacing sealing plate (234); A second cylinder (224) is provided at the outer end of the second rod (223); One end of the second cylinder (224) close to the first cylinder (231) is slidably mounted in the first cylinder (231), and a second bottom cover (225) is fixed to one end of the second cylinder (224) close to the first cylinder (231), and the second bottom cover (225) is fixedly connected to the outer end of the second rod (223); A cover plate (226) is fixed to one end of the second cylinder (224) away from the first cylinder (231), and a through hole for the first piston rod (21) to pass through is provided in the center of the cover plate (226).

7. The electric cylinder with a bidirectional buffer device according to claim 6, characterized in that: The first piston rod (21) comprises a first piston (211) slidably mounted in the second cylinder (224), and a first rod body (212) slidably mounted in the through hole of the cover plate (226); the inner end of the first rod body (212) is fixedly connected to the first piston (211), and the first oil chamber (221) is between the first piston (211) and the second bottom cover (225); The outer end of the first rod body (212) is fixedly connected to the cylinder bottom end of the electric cylinder body (1) via a flange (213).

8. The electric cylinder with a bidirectional buffer device according to claim 1, characterized in that: The first oil chamber (221) and the second oil chamber (232) are both connected to the accumulator (3) via a hydraulic oil pipe (31).

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