Electric cylinder with buffer

Abstract

The utility model relates to the technical field of electric cylinders, and discloses an electric cylinder with a buffer, which comprises a first cavity fixedly connected to the outer side wall of the electric cylinder, a piston rod penetrating through and extending into the first cavity, and a piston disc slidably connected to the inner side wall of the first cavity; the second cavity is fixedly connected to the top of the electric cylinder through a frame, and the bottom end of the second cavity is fixedly connected with the connecting pipe; the through hole is formed in the connecting pipe and the cavity II; and the side plate is connected to the inner wall of the cavity II in a sliding manner. When the electric cylinder moves at a high speed or suddenly stops, the piston rod drives the piston disc to extrude hydraulic oil in the first cavity into the second cavity through the through hole, in the process, flowing of the hydraulic oil can generate resistance, so that the movement of the piston disc is hindered, the buffering effect is achieved, and before equipment runs, the hydraulic oil is prevented from flowing into the second cavity. A worker can determine required buffering performance parameters according to specific working scenes of the electric cylinder to adjust the volume of the second cavity, and the electric cylinder can adapt to different working conditions conveniently.

Description

Technical Field

[0001] This utility model relates to the field of electric cylinder technology, specifically to an electric cylinder with a buffer. Background Technology

[0002] An electric cylinder is a device that can achieve linear motion through electric drive. It typically consists of an electric motor, a transmission device, and a slider. The power provided by the electric motor drives the transmission device to move the slider linearly. Electric cylinders are widely used in industrial automation and can be used to control the linear motion of valves, actuators, robotic arms, and other equipment. Compared with pneumatic cylinders, electric cylinders have more precise position control and more stable motion characteristics, and therefore are widely used in some applications with high motion accuracy requirements.

[0003] Existing electric cylinders generate significant impact forces when moving at high speeds or stopping suddenly. This can damage the structure of the electric cylinder itself, such as the motor, lead screw, nut, and guide rail, shortening its service life. Therefore, a buffer is needed to cushion the impact and improve the service life of the electric cylinder. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an electric cylinder with a buffer, which has the advantage of buffering and solves the problem that existing electric cylinders generate large impact forces when moving at high speed or stopping suddenly, which can easily damage the electric cylinder and shorten its service life.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an electric cylinder with a buffer, comprising a main body assembly, wherein the main body assembly includes:

[0008] An electric cylinder has a connecting plate fixedly connected to the outside of its output shaft;

[0009] The piston rod is fixedly connected to the outer wall of the connecting plate;

[0010] A piston disc is fixedly connected to the end of the piston rod away from the connecting plate;

[0011] The electric cylinder, the piston rod, and the piston disc are provided with a buffer assembly, the buffer assembly comprising:

[0012] A cavity one is fixedly connected to the outer wall of the electric cylinder, the piston rod passes through and extends into the cavity one, and the piston disc is slidably connected to the inner wall of the cavity one;

[0013] A connecting pipe is disposed at the top of the cavity;

[0014] Cavity 2 is fixedly connected to the top of the electric cylinder via a frame, and the bottom end of cavity 2 is fixedly connected to the connecting pipe;

[0015] A through hole is formed in the connecting pipe and the second cavity;

[0016] The side plate is slidably connected to the inner wall of the cavity.

[0017] The connecting rod is fixedly connected to the right side wall of the side plate;

[0018] A solenoid valve is provided on the side plate;

[0019] An electric push rod is located at the top of the second cavity, and the output shaft of the electric push rod is fixedly connected to the right end of the connecting rod.

[0020] Preferably, a return spring is fixedly connected between the inner wall of the right side of the cavity and the piston disc, and the return spring is sleeved on the outside of the piston rod.

[0021] Preferably, both the connecting pipe and the bottom of the cavity are symmetrically provided with oil guide holes.

[0022] Preferably, the connecting pipe is provided with an adjustment component, the adjustment component comprising:

[0023] The bracket is fixedly connected to the outer wall of the connecting pipe;

[0024] A lead screw passes through and is threaded onto the bracket;

[0025] A plug plate is threaded to the outside of the lead screw, with one end of the plug plate penetrating and extending into the inside of the connecting pipe;

[0026] The handwheel is fixedly connected to the left end of the lead screw.

[0027] Preferably, a sealing ring is provided on the connecting pipe, and the handwheel is slidably connected inside the sealing ring.

[0028] Preferably, the inner walls of the two cavities are symmetrically connected with baffles.

[0029] (III) Beneficial Effects

[0030] Compared with the prior art, the present invention provides an electric cylinder with a buffer, which has the following advantages:

[0031] This electric cylinder possesses the advantage of cushioning. When the electric cylinder moves at high speed or stops suddenly, the piston rod drives the piston disc to move to the left. The piston disc forces the hydraulic oil inside cavity one through the through hole into cavity two. During this process, the flow of hydraulic oil generates resistance, thus hindering the movement of the piston disc and achieving a cushioning effect. Furthermore, before operating the equipment, operators can determine the required cushioning performance parameters based on the specific working scenario of the electric cylinder and adjust the volume of cavity two to adapt to different working conditions. This solves the problem that existing electric cylinders generate large impact forces during high-speed movement or sudden stops, easily causing damage to the electric cylinder and shortening its service life. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of this utility model;

[0033] Figure 2 This is an enlarged structural diagram of point A in this utility model;

[0034] Figure 3 This is a schematic diagram of the rear view structure of this utility model;

[0035] Figure 4 This is a front view cross-sectional structural diagram of cavity one and cavity two in this utility model;

[0036] Figure 5 This is a front view cross-sectional structural diagram of the connecting pipe in this utility model.

[0037] In the picture:

[0038] 1. Main component; 11. Electric cylinder; 12. Connecting plate; 13. Piston rod; 14. Piston disc;

[0039] 2. Buffer assembly; 21. Cavity 1; 22. Connecting pipe; 23. Through hole; 24. Cavity 2; 25. Side plate; 251. Connecting rod; 252. Solenoid valve; 26. Electric push rod; 27. Return spring;

[0040] 3. Adjustment assembly; 31. Bracket; 32. Lead screw; 33. Insert plate; 34. Handwheel; 35. Sealing ring;

[0041] 4. Oil guide hole; 5. Baffle. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not 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 effort are within the protection scope of the present utility model.

[0043] Example 1

[0044] See Figure 1-5 An electric cylinder with a buffer includes a main body assembly 1, the main body assembly 1 including: an electric cylinder 11, the output shaft of which is fixedly connected to a connecting plate 12; a piston rod 13, fixedly connected to the outer wall of the connecting plate 12; and a piston disc 14, fixedly connected to the end of the piston rod 13 away from the connecting plate 12; a buffer assembly 2 is provided on the electric cylinder 11, the piston rod 13, and the piston disc 14, the buffer assembly 2 including: a cavity 21, fixedly connected to the outer wall of the electric cylinder 11, the piston rod 13 penetrating and extending into the cavity 21, and the piston disc 14 slidably connected to the connecting plate 12. The inner wall of cavity one 21; a connecting pipe 22 is disposed at the top of cavity one 21; cavity two 24 is fixedly connected to the top of electric cylinder 11 by a frame, and the bottom end of cavity two 24 is fixedly connected to the connecting pipe 22; a through hole 23 is formed on the connecting pipe 22 and cavity two 24; a side plate 25 is slidably connected to the inner wall of cavity two 24; a connecting rod 251 is fixedly connected to the right side wall of the side plate 25; a solenoid valve 252 is formed on the side plate 25; an electric push rod 26 is disposed at the top of cavity two 24, and the output shaft of the electric push rod 26 is fixedly connected to the right end of the connecting rod 251. A return spring 27 is fixedly connected between the right inner wall of cavity one 21 and the piston disc 14, and the return spring 27 is sleeved on the outside of the piston rod 13. Oil guide holes 4 are symmetrically formed at the bottom of both the connecting pipe 22 and cavity two 24.

[0045] During use, cavity 21 is filled with hydraulic oil. When electric cylinder 11 moves at high speed or stops suddenly, the output shaft of electric cylinder 11 drives connecting plate 12 to move to the left. Piston rod 13 drives piston disc 14 to move to the left. Piston disc 14 squeezes the hydraulic oil inside cavity 21. The hydraulic oil enters cavity 24 through through hole 23. During this process, the flow of hydraulic oil will generate resistance, which will hinder the movement of piston disc 14 and play a buffering role. When piston disc 14 stops moving, the hydraulic oil flows back into cavity 21 under the combined action of pressure difference and gravity, which facilitates the next buffering. Furthermore, before the equipment is put into operation, the operator can determine the required buffering performance parameters according to the specific working scenario of the electric cylinder 11, and adjust the volume of the second cavity 24 to adapt to different working conditions: when the impact force of the electric cylinder 11 is large, the operator opens the solenoid valve 252 and controls the output shaft of the electric push rod 26 to extend. The output shaft of the electric push rod 26 drives the electric push rod 26 to move to the right through the connecting rod 251, thereby increasing the volume of the second cavity 24. When the side plate 25 is adjusted to a certain position, the solenoid valve 252 is closed, allowing the second cavity 24 to absorb more hydraulic oil and the buffering to be more gentle. When the impact force of the electric cylinder 11 is small, the operator controls the electric push rod 26 to retract according to the above method, thereby reducing the volume of the second cavity 24 and maintaining efficient and rapid buffering, flexibly adapting to different working conditions.

[0046] The curved guide hole 4 increases the length of the oil passage, causing the hydraulic oil to encounter more resistance during flow, thereby consuming more impact energy and achieving a better buffering effect.

[0047] Example 2

[0048] An auxiliary function has been added based on Embodiment 1.

[0049] See Figure 1-5 An adjusting assembly 3 is provided on the connecting pipe 22. The adjusting assembly 3 includes: a bracket 31, fixedly connected to the outer wall of the connecting pipe 22; a lead screw 32, passing through and threadedly connected to the bracket 31; an insert plate 33, threadedly connected to the outside of the lead screw 32, with one end of the insert plate 33 passing through and extending into the inside of the connecting pipe 22; and a handwheel 34, fixedly connected to the left end of the lead screw 32. A sealing ring 35 is provided on the connecting pipe 22, and the handwheel 34 is slidably connected to the inside of the sealing ring 35. Baffles 5 are symmetrically and fixedly connected to the inner wall of the cavity 24.

[0050] Adjustment component 3 regulates the flow rate of through-hole 23, facilitating control of the hydraulic oil flow rate between cavity 1 21 and cavity 24. When the flow rate of through-hole 23 needs to be reduced, the operator rotates handwheel 34, which drives screw 32 to rotate. The insert plate 33, externally threaded to screw 32, moves into the connecting pipe 22, thereby reducing the cross-sectional area of ​​through-hole 23. Conversely, in situations requiring rapid buffering, the operator rotates handwheel 34 in the opposite direction, increasing the cross-sectional area of ​​through-hole 23, which enlarges the oil passage diameter, allowing the hydraulic oil to flow rapidly and achieving rapid buffering. Sealing ring 35 seals the moving area of ​​insert plate 33 to prevent hydraulic oil leakage. Baffle 5 alters the originally relatively direct flow trajectory of hydraulic oil in cavity 24, making its flow path more tortuous and increasing its flow distance within cavity 24. A longer flow path means the hydraulic oil needs to overcome greater resistance, thus consuming more energy and enhancing the buffering effect.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric cylinder with buffer, comprising a main body assembly (1), the main body assembly (1) comprising: an electric cylinder (11), the output shaft of which is fixedly connected with a connecting plate (12); a piston rod (13), which is fixedly connected to the outer side wall of the connecting plate (12); a piston disc (14), which is fixedly connected to one end of the piston rod (13) away from the connecting plate (12); characterized in that the electric cylinder (11), the piston rod (13) and the piston disc (14) are provided with a buffer assembly (2), the buffer assembly (2) comprising: a cavity I (21), which is fixedly connected to the outer side wall of the electric cylinder (11), the piston rod (13) extending through and into the cavity I (21), and the piston disc (14) being slidingly connected to the inner side wall of the cavity I (21); a connecting pipe (22), which is arranged on the top of the cavity I (21); a cavity II (24), which is fixedly connected to the top of the electric cylinder (11) through a shelf, the bottom end of the cavity II (24) being fixedly connected with the connecting pipe (22); through holes (23), which are arranged on the connecting pipe (22) and the cavity II (24); an edge plate (25), which is slidingly connected to the inner wall of the cavity II (24); a connecting rod (251), which is fixedly connected to the right side wall of the edge plate (25); a solenoid valve (252), which is arranged on the edge plate (25); an electric push rod (26), which is arranged on the top of the cavity II (24), the output shaft of the electric push rod (26) being fixedly connected with the right end of the connecting rod (251).

2. The electric cylinder with a damper according to claim 1, characterized in that: A return spring (27) is fixedly connected between the right inner wall of the cavity I (21) and the piston disc (14), the return spring (27) being sleeved on the outside of the piston rod (13).

3. The electric cylinder with a damper according to claim 2, characterized in that: The connecting pipe (22) and the bottom of the cavity II (24) are symmetrically provided with oil guide holes (4).

4. The electric cylinder with a damper according to claim 3, characterized in that: An adjusting assembly (3) is arranged on the connecting pipe (22), the adjusting assembly (3) comprising: a bracket (31), which is fixedly connected to the outer side wall of the connecting pipe (22); a lead screw (32), which extends through and is threadedly connected to the bracket (31); a plug-in plate (33), which is threadedly connected to the outside of the lead screw (32), one end of the plug-in plate (33) extending through and into the connecting pipe (22); a hand wheel (34), which is fixedly connected to the left end of the lead screw (32).

5. The electric cylinder with a damper according to claim 4, characterized in that: A sealing ring (35) is arranged on the connecting pipe (22), and the hand wheel (34) is slidingly connected to the inside of the sealing ring (35).

6. The electric cylinder with a damper according to claim 4, characterized by: The cavity II (24) is symmetrically and fixedly provided with a baffle (5).

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