Electrically powered supercharging cylinder

Abstract

The application belongs to the technical field of pressure intensifying cylinders, and discloses an electric pressure intensifying cylinder, which comprises a first supporting plate, the bottom surface of the first supporting plate is fixedly provided with a pressure intensifying cylinder body, the pressure intensifying cylinder body comprises a cylinder body fixedly arranged on the bottom surface of the first supporting plate, a support fixedly arranged on the bottom surface of the cylinder body and a piston rod slidingly arranged in the cylinder body, the piston rod divides the cylinder body into two parts, the upper part of the piston rod is an upper oil cavity, the lower part of the piston rod is a lower oil cavity, a second supporting plate is installed on the side wall of the support, and an oil cylinder is fixedly arranged on the upper surface of the second supporting plate. The application has the effect of reducing the use cost.

Description

Technical Field

[0001] This utility model relates to the field of booster cylinder technology, and particularly to electric booster cylinder. Background Technology

[0002] The booster cylinder, also known as the pneumatic-hydraulic booster cylinder, is an improved design that combines the advantages of pneumatic cylinders and hydraulic cylinders. The hydraulic oil and compressed air are strictly isolated. The piston rod inside the cylinder automatically starts its stroke after contacting the workpiece, resulting in fast action speed and greater stability than pneumatic transmission. The cylinder body is simple, and the output adjustment is easy. Under the same conditions, it can achieve the high output of a hydraulic press, with low energy consumption, soft landing without damaging the mold, easy installation, and special booster cylinders can be installed at any angle of 360 degrees. It occupies little space, has few failures and no temperature rise issues, long service life, and low noise, among other core characteristics.

[0003] Traditional pneumatic-hydraulic booster cylinders cannot simultaneously control the displacement and speed of the push rod. Furthermore, when a large push rod output force is required, the pneumatic-hydraulic booster cylinder is also quite large. If a high-output servo electric cylinder is used, the cost is high. Utility Model Content

[0004] To solve the above problems, this utility model provides an electric booster cylinder.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an electric booster cylinder, including a first support plate, a booster cylinder body fixedly mounted on the bottom surface of the first support plate, the booster cylinder body including a cylinder body fixedly mounted on the bottom surface of the first support plate, a support fixedly mounted on the bottom surface of the cylinder body, and a piston rod slidably mounted in the cylinder body, the piston rod dividing the cylinder body into two parts, the upper part of the piston rod being an upper oil chamber and the lower part of the piston rod being a lower oil chamber, a second support plate mounted on the side wall of the support, an oil cylinder fixedly mounted on the upper surface of the second support plate, a first connecting pipe connected to the oil cylinder, the other end of the first connecting pipe communicating with the upper oil chamber, a first control valve mounted on the first connecting pipe, a second connecting pipe connected to the first connecting pipe, the other end of the second connecting pipe communicating with the lower oil chamber, a second control valve mounted on the second connecting pipe, and a control device for controlling the movement of the piston rod mounted on the booster cylinder body, the control device including a control component and a drive component.

[0006] Furthermore, the control component includes a lead screw body disposed on the upper surface of the first support plate and a lead screw nut threadedly connected to the lead screw body. The lead screw body passes through the first support plate and the cylinder body and extends into the cylinder body to be threadedly connected to the lead screw nut. The lead screw nut is slidably connected to the inner wall of the cylinder body, and the lead screw nut is fixed to the piston rod.

[0007] Furthermore, the drive assembly includes a motor fixedly mounted on the bottom surface of the first support plate, a first pulley sleeved on the output shaft of the motor, a second pulley sleeved on the outer wall of the lead screw body, and a belt body mounted on the first pulley and the second pulley. The first pulley is fixed to the output shaft of the motor, and the second pulley is fixed to the lead screw body.

[0008] By adopting the above technical solution, when the operator needs to use the booster cylinder body, the operator opens the first and second control valves, allowing the hydraulic oil in the cylinder to flow into the lower oil chamber. Once the lower oil chamber is full, the second control valve is closed. At this time, the piston rod is in the initial state, the second control valve is closed, the first control valve is open, and the lower oil chamber is full. Next, the operator needs to start the motor to rotate forward, which drives the first pulley to rotate. The first pulley drives the second pulley to rotate through the belt body, and the second pulley drives the lead screw body to rotate. This causes the lead screw nut to move downward under the action of the lead screw body, thereby causing the piston rod to move downward under the action of the lead screw nut. When the piston rod moves to below the first connection, the hydraulic oil in the cylinder enters the upper oil chamber through the first control valve. When the upper oil chamber is full, the operator needs to close the first control valve and open the second control valve. At this time, the motor continues to rotate forward, driving the piston rod to continue moving downward. When the piston rod enters the lower oil chamber, it compresses the hydraulic oil in the lower oil chamber, forming high-pressure oil. When the high-pressure oil enters the upper oil chamber through the second control valve, it pushes the piston rod to perform a large-tonnage operation. When the large-tonnage operation is completed, the operator needs to start the motor to reverse, thereby resetting the piston rod. At the same time, the first control valve is opened, allowing hydraulic oil to flow from the upper oil chamber into the cylinder. At this time, the lower oil chamber is full of oil. Finally, after the piston rod has reset, the first control valve is closed. In this process, by driving the piston rod in the booster cylinder body with the motor, the displacement and speed of the piston rod can be controlled simultaneously. At the same time, the piston rod can perform large-tonnage operations, thereby reducing the operating cost.

[0009] Furthermore, a sealing cylinder is fixedly installed on the bottom surface of the support, a sealing plate is fixedly installed on the bottom surface of the sealing cylinder, a push rod is slidably installed inside the sealing cylinder, the push rod passes through the sealing plate and extends to the outside of the sealing plate, and the piston rod and the push rod are connected to each other.

[0010] Furthermore, a limiting plate is installed on the upper surface of the push rod, and a limiting hole is fixedly provided on the upper surface of the limiting plate. An installation hole is opened on the upper surface of the push rod, and the lower end of the piston rod passes through the limiting hole and extends into the installation hole. A buffer spring is installed on the inner bottom wall of the installation hole, and the other end of the buffer spring abuts against the upper surface of the piston rod.

[0011] By adopting the above technical solution, when the piston rod moves downward, it moves into the mounting hole, which in turn causes the push rod to move downward under the action of the piston rod. During this process, the push rod performs heavy-duty work under the action of the piston rod. In use, the buffer spring provides buffer space between the piston rod and the push rod, thereby reducing the probability of piston rod damage when performing heavy-duty work and thus extending the service life of the device.

[0012] Furthermore, a limiting member is fixedly provided on the lower surface of the piston rod, and the diameter of the limiting member is larger than the diameter of the limiting hole.

[0013] By adopting the above technical solution, the diameter of the limiting component is larger than the diameter of the limiting hole, which reduces the probability of the piston rod moving outside the mounting hole, thereby improving the stability of the device.

[0014] Furthermore, the upper surface of the piston rod is provided with a receiving groove, and the lower end of the lead screw body extends into the receiving groove.

[0015] By adopting the above technical solution, the receiving groove reduces the probability of collision between the lead screw body and the piston rod, thereby improving the stability of the device.

[0016] Furthermore, the bottom surface of the first support plate is provided with an installation groove, and a bearing is provided in the installation groove, wherein the inner ring of the bearing is fixed to the outer wall of the lead screw.

[0017] By adopting the above technical solution, the bearing reduces the difficulty of rotating the lead screw body, thereby reducing the difficulty of the workers' work.

[0018] Furthermore, sealing gaskets are installed on both the upper and lower surfaces of the lead screw nut.

[0019] By adopting the above technical solution, the sealing gasket reduces the probability of hydraulic oil seeping into the lead screw nut, thereby improving the sealing performance of the device.

[0020] Furthermore, a sealing groove is provided in the support, and a sliding sealing ring is installed in the sealing groove. A protective component for protecting the drive assembly is installed on the upper surface of the first support plate.

[0021] By adopting the above technical solution, the sliding seal ring reduces the probability of hydraulic oil leakage in the lower oil chamber, thereby improving the sealing performance of the device. The protective component blocks dust, thus reducing the probability of dust affecting the drive components and extending the service life of the device.

[0022] In summary, this utility model has the following beneficial effects:

[0023] 1. In this application, when the operator needs to use the booster cylinder body, the operator opens the first control valve and the second control valve, allowing the hydraulic oil in the cylinder to flow into the lower oil chamber. After the lower oil chamber is full of hydraulic oil, the second control valve is closed. At this time, the piston rod is in the initial state, the second control valve is in the closed state, the first control valve is in the open state, and the lower oil chamber is full of oil. Next, the operator needs to start the motor to rotate forward, which drives the first pulley to rotate. The first pulley drives the second pulley to rotate through the belt body, and the second pulley drives the lead screw body to rotate, thereby causing the lead screw nut to move downward under the action of the lead screw body. This causes the piston rod to move downward under the action of the lead screw nut. When the piston rod moves to below the first connection, the hydraulic oil in the cylinder enters the upper oil chamber through the first control valve. When the upper oil chamber is full of oil, the operator needs to close the first control valve and open the second control valve. At this time, the motor continues to rotate forward, driving the piston rod to continue moving downward. When the piston rod enters the lower oil chamber, it squeezes the hydraulic oil in the lower oil chamber, forming high-pressure oil. When the high-pressure oil enters the upper oil chamber through the second control valve, it pushes the piston rod to perform a large-tonnage work. When the large-tonnage work is completed, the operator needs to start the motor to reverse, thereby resetting the piston rod. At the same time, the first control valve is opened, allowing hydraulic oil to flow from the upper oil chamber into the cylinder. At this time, the lower oil chamber is full of oil. Finally, after the piston rod has reset, the first control valve is closed. In this process, by driving the piston rod in the booster cylinder body to move through the motor, the displacement and speed of the piston rod can be controlled simultaneously. At the same time, the piston rod can perform large-tonnage work, thereby reducing the operating cost.

[0024] 2. In this application, when the piston rod moves downward, it moves into the mounting hole, which in turn causes the push rod to move downward under the action of the piston rod. During this process, the push rod performs heavy-duty work under the action of the piston rod. During use, the buffer spring provides buffer space between the piston rod and the push rod, thereby reducing the probability of piston rod damage when performing heavy-duty work, thus extending the service life of the device.

[0025] 3. In this application, the diameter of the limiting member is larger than the diameter of the limiting hole, which reduces the probability of the piston rod moving outside the mounting hole, thereby improving the stability of the device. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the driving component in an embodiment of this utility model;

[0028] Figure 3 This is a cross-sectional structural diagram of the booster cylinder body in an embodiment of this utility model;

[0029] Figure 4 This is a cross-sectional structural diagram of the control component in an embodiment of this utility model;

[0030] Figure 5 This is a cross-sectional structural diagram of the sealing cylinder in an embodiment of this utility model.

[0031] In the diagram: 1. First support plate; 11. Upper oil chamber; 12. Lower oil chamber; 13. Second support plate; 14. Oil cylinder; 2. Booster cylinder body; 21. Cylinder body; 22. Support; 23. Piston rod; 3. Control assembly; 31. Lead screw body; 32. Lead screw nut; 4. Drive assembly; 41. Motor; 42. First pulley; 43. Second pulley; 44. Belt body; 5. Sealing cylinder; 51. Sealing plate; 52. Top rod; 6. Limiting plate; 61. Limiting hole; 62. Mounting hole; 63. Buffer spring; 7. Limiting component; 8. Receiving groove; 81. Mounting groove; 82. Bearing; 9. Sealing gasket; 91. Sealing groove; 92. Sliding sealing ring; 93. Protective component. Detailed Implementation

[0032] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0033] like Figure 1-5As shown in the figure, this application discloses an electric booster cylinder, including a first support plate 1, a second support plate 13, a hydraulic cylinder 14, a booster cylinder body 2, a control component 3, a drive component 4, a sealing cylinder 5, a sealing plate 51, a push rod 52, a limiting plate 6, and a buffer spring 63. The first support plate 1 is a rectangular plate structure. The booster cylinder body 2 is fixedly disposed on the bottom surface of the first support plate 1. The booster cylinder body 2 includes a cylinder body 21, a support 22, and a piston rod 23. The cylinder body 21 is fixedly disposed on the bottom surface of the first support plate 1, the support 22 is fixedly disposed on the bottom surface of the cylinder body 21, and the piston rod 23 is slidably disposed inside the cylinder body 21. The piston rod 23 divides the cylinder body 21 into two parts: an upper oil chamber 11 above the piston rod 23 and a lower oil chamber 12 below the piston rod 23. A first connecting pipe (not shown in the figure) is connected to the hydraulic cylinder 14, and the other end of the first connecting pipe is interconnected with the upper oil chamber 11. A first control valve (not shown in the figure) is disposed on the first connecting pipe and is used to control the opening and closing of the first connecting pipe. The second connecting pipe (not shown in the figure) is connected to the first connecting pipe, and the other end of the second connecting pipe is in communication with the lower oil chamber 12. The second control valve (not shown in the figure) is installed on the second connecting pipe and is used to control the opening and closing of the second connecting pipe. The control device is installed on the booster cylinder body 2 and is used to control the movement of the piston rod 23. The control device includes a control component 3 and a drive component 4.

[0034] The control assembly 3 includes a lead screw body 31 and a lead screw nut 32. The lead screw body 31 is disposed on the upper surface of the first support plate 1, and its axis is vertical. The lead screw nut 32 is threadedly connected to the lead screw body 31, and its axis coincides with the axis of the lead screw body 31. The lead screw body 31 passes through the first support plate 1 and the cylinder 21 and extends into the cylinder 21 to be threadedly connected to the lead screw nut 32. The lead screw nut 32 is slidably connected to the inner wall of the cylinder 21, and the lead screw nut 32 is fixed to the piston rod 23.

[0035] The drive assembly 4 includes a motor 41, a first pulley 42, a second pulley 43, and a belt body 44. The motor 41 is fixedly mounted on the bottom surface of the first support plate 1, and its output shaft axis is vertical. The first pulley 42 is sleeved on the output shaft of the motor 41, and its axis coincides with the axis of the output shaft of the motor 41. The first pulley 42 and the output shaft of the motor 41 are fixed to each other. The second pulley 43 is sleeved on the outer wall of the lead screw body 31, and its axis coincides with the axis of the lead screw body 31. The second pulley 43 and the lead screw body 31 are fixed to each other. The belt body 44 is disposed on the first pulley 42 and the second pulley 43.

[0036] When the operator needs to use the booster cylinder body 2, they open the first and second control valves, allowing the hydraulic oil in the cylinder 14 to flow into the lower oil chamber 12. Once the lower oil chamber 12 is full, the second control valve is closed. At this time, the piston rod 23 is in its initial state, the second control valve is closed, the first control valve is open, and the lower oil chamber 12 is full. Next, the operator starts the motor 41 to rotate forward, which drives the first pulley 42 to rotate. The first pulley 42 drives the second pulley 43 to rotate via the belt body 44. The second pulley 43 drives the lead screw body 31 to rotate, causing the lead screw nut 32 to move downward under the action of the lead screw body 31. This causes the piston rod 23 to move downward under the action of the lead screw nut 32. When the piston rod 23 moves to below the first connection, the hydraulic oil in the cylinder 14 enters the upper oil chamber 11 through the first control valve. When the upper oil chamber 11 is full, the operator closes the first control valve and opens the second control valve. At this time, the motor 41 continues to rotate forward, driving the piston rod 23 to continue moving downward. When the piston rod 23 enters the lower oil chamber 12, it will squeeze the hydraulic oil in the lower oil chamber 12 to form high-pressure oil. When the high-pressure oil enters the upper oil chamber 11 through the second control valve, it will push the piston rod 23 to perform a large-tonnage work. When the large-tonnage work is completed, the operator needs to start the motor 41 to reverse, thereby resetting the piston rod 23. At the same time, the first control valve is opened, allowing the hydraulic oil to flow from the upper oil chamber 11 into the oil cylinder 14. At this time, the lower oil chamber 12 is full of oil. Finally, after the piston rod 23 has reset, the first control valve is closed. In this process, by driving the piston rod 23 in the booster cylinder body 2 to move through the motor 41, the displacement and speed of the piston rod 23 can be controlled simultaneously. At the same time, the piston rod 23 can also perform a large-tonnage work, thereby reducing the operating cost.

[0037] The sealing cylinder 5 is fixedly mounted on the bottom surface of the support 22, and the sealing plate 51 is fixedly mounted on the bottom surface of the sealing cylinder 5. The push rod 52 is slidably mounted inside the sealing cylinder 5, passes through the sealing plate 51 and extends to the outside of the sealing plate 51, and the piston rod 23 is connected to the push rod 52.

[0038] A limiting plate 6 is installed on the upper surface of the push rod 52. A limiting hole 61 is fixedly provided on the upper surface of the limiting plate 6. An installation hole 62 is opened on the upper surface of the push rod 52. The lower end of the piston rod 23 passes through the limiting hole 61 and extends into the installation hole 62. One end of the buffer spring 63 is installed on the inner bottom wall of the installation hole 62, and the other end of the buffer spring 63 abuts against the upper surface of the piston rod 23.

[0039] When the piston rod 23 moves downward, it moves into the mounting hole 62, which in turn causes the push rod 52 to move downward under the action of the piston rod 23. During this process, the push rod 52 performs heavy-duty work under the action of the piston rod 23. During use, the buffer spring 63 provides buffer space between the piston rod 23 and the push rod 52, thereby reducing the probability of damage to the piston rod 23 when performing heavy-duty work, thus extending the service life of the device.

[0040] To improve the stability of the device, a limiting member 7 is fixedly installed on the lower surface of the piston rod 23. The diameter of the limiting member 7 is larger than the diameter of the limiting hole 61. The larger diameter of the limiting member 7 reduces the probability of the piston rod 23 moving outside the mounting hole 62, thereby improving the stability of the device.

[0041] To improve the stability of the device, a receiving groove 8 is formed on the upper surface of the piston rod 23, and the lower end of the lead screw body 31 extends into the receiving groove 8. The receiving groove 8 reduces the probability of collision between the lead screw body 31 and the piston rod 23, thereby improving the stability of the device.

[0042] To reduce the difficulty of the workers' work, a mounting groove 81 is provided on the bottom surface of the first support plate 1, and a bearing 82 is installed in the mounting groove 81. The inner ring of the bearing 82 is fixed to the outer wall of the lead screw. The bearing 82 reduces the difficulty of rotating the lead screw body 31, thereby reducing the difficulty of the workers' work.

[0043] To improve the sealing performance of the device, sealing gaskets 9 are installed on both the upper and lower surfaces of the lead screw nut 32. The sealing gaskets 9 reduce the probability of hydraulic oil seeping into the lead screw nut 32, thereby improving the sealing performance of the device.

[0044] To improve the sealing performance of the device, a sealing groove 91 is provided inside the support 22, and a sliding sealing ring 92 is installed inside the sealing groove 91. The sliding sealing ring 92 reduces the probability of hydraulic oil leakage in the lower oil chamber 12, thereby improving the sealing performance of the device.

[0045] To extend the service life of the device, a protective element 93 for protecting the drive assembly 4 is installed on the upper surface of the first support plate 1. The protective element 93 blocks dust, thereby reducing the probability of dust affecting the drive assembly 4 and thus extending the service life of the device.

[0046] In this embodiment, the operating principle of the electric booster cylinder is as follows: When the operator needs to use the booster cylinder body 2, the operator opens the first control valve and the second control valve, allowing the hydraulic oil in the cylinder 14 to flow into the lower oil chamber 12. After the lower oil chamber 12 is full of hydraulic oil, the second control valve is closed. At this time, the piston rod 23 is in the initial state, the second control valve is in the closed state, the first control valve is in the open state, and the lower oil chamber 12 is full of oil. Next, the operator needs to start the motor 41 to rotate forward. The motor 41 drives the first pulley 42 to rotate, and the first pulley 42 drives the second pulley 43 to rotate through the belt body 44. The second pulley 43 drives the lead screw body 31 to rotate, thereby causing the lead screw nut 32 to move downward under the action of the lead screw body 31. This causes the piston rod 23 to move downward under the action of the lead screw nut 32. When the piston rod 23 moves to below the first connection, the hydraulic oil in the cylinder 14 enters the upper oil chamber 11 through the first control valve. When the upper oil chamber 11 is full of oil, the operator needs to close the first control valve and open the second control valve. At this time, the motor 41 continues to rotate forward, driving the piston rod 23 to continue moving downward. When the piston rod 23 enters the lower oil chamber 12, it will squeeze the hydraulic oil in the lower oil chamber 12 to form high-pressure oil. When the high-pressure oil enters the upper oil chamber 11 through the second control valve, it will push the piston rod 23 to perform a large-tonnage work. When the large-tonnage work is completed, the operator needs to start the motor 41 to reverse, thereby resetting the piston rod 23. At the same time, the first control valve is opened, allowing the hydraulic oil to flow from the upper oil chamber 11 into the oil cylinder 14. At this time, the lower oil chamber 12 is full of oil. Finally, after the piston rod 23 has reset, the first control valve is closed. In this process, by driving the piston rod 23 in the booster cylinder body 2 to move through the motor 41, the displacement and speed of the piston rod 23 can be controlled simultaneously. At the same time, the piston rod 23 can also perform a large-tonnage work, thereby reducing the operating cost.

[0047] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An electric booster cylinder, including a first support plate (1), characterized in that: A booster cylinder body (2) is fixedly mounted on the bottom surface of the first support plate (1). The booster cylinder body (2) includes a cylinder body (21) fixedly mounted on the bottom surface of the first support plate (1), a support (22) fixedly mounted on the bottom surface of the cylinder body (21), and a piston rod (23) slidably mounted inside the cylinder body (21). The piston rod (23) divides the cylinder body (21) into two parts. The upper part of the piston rod (23) is the upper oil chamber (11), and the lower part of the piston rod (23) is the lower oil chamber (12). A second support plate (13) is mounted on the side wall of the support (22). A hydraulic cylinder (14) is fixedly installed on the upper surface of the second support plate (13). A first connecting pipe is connected to the hydraulic cylinder (14). The other end of the first connecting pipe is connected to the upper oil chamber (11). A first control valve is installed on the first connecting pipe. A second connecting pipe is connected to the first connecting pipe. The other end of the second connecting pipe is connected to the lower oil chamber (12). A second control valve is installed on the second connecting pipe. A control device for controlling the movement of the piston rod (23) is installed on the booster cylinder body (2). The control device includes a control component (3) and a drive component (4).

2. The electric booster cylinder according to claim 1, characterized in that: The control component (3) includes a lead screw body (31) disposed on the upper surface of the first support plate (1) and a lead screw nut (32) threadedly connected to the lead screw body (31). The lead screw body (31) passes through the first support plate (1) and the cylinder (21) and extends into the cylinder (21) to be threadedly connected to the lead screw nut (32). The lead screw nut (32) is slidably connected to the inner wall of the cylinder (21). The lead screw nut (32) is fixed to the piston rod (23).

3. The electric booster cylinder according to claim 2, characterized in that: The drive assembly (4) includes a motor (41) fixedly mounted on the bottom surface of the first support plate (1), a first pulley (42) sleeved on the output shaft of the motor (41), a second pulley (43) sleeved on the outer wall of the lead screw body (31), and a belt body (44) mounted on the first pulley (42) and the second pulley (43). The first pulley (42) is fixed to the output shaft of the motor (41), and the second pulley (43) is fixed to the lead screw body (31).

4. The electric booster cylinder according to claim 1, characterized in that: A sealing cylinder (5) is fixedly installed on the bottom surface of the support (22), and a sealing plate (51) is fixedly installed on the bottom surface of the sealing cylinder (5). A push rod (52) is slidably installed inside the sealing cylinder (5). The push rod (52) passes through the sealing plate (51) and extends to the outside of the sealing plate (51). The piston rod (23) is connected to the push rod (52).

5. The electric booster cylinder according to claim 4, characterized in that: A limiting plate (6) is installed on the upper surface of the top rod (52). A limiting hole (61) is fixedly provided on the upper surface of the limiting plate (6). An installation hole (62) is opened on the upper surface of the top rod (52). The lower end of the piston rod (23) passes through the limiting hole (61) and extends into the installation hole (62). A buffer spring (63) is installed on the inner bottom wall of the installation hole (62). The other end of the buffer spring (63) abuts against the upper surface of the piston rod (23).

6. The electric booster cylinder according to claim 5, characterized in that: A limiting member (7) is fixedly provided on the lower surface of the piston rod (23), and the diameter of the limiting member (7) is larger than the diameter of the limiting hole (61).

7. The electric booster cylinder according to claim 2, characterized in that: The piston rod (23) has a receiving groove (8) on its upper surface, and the lower end of the lead screw body (31) extends into the receiving groove (8).

8. The electric booster cylinder according to claim 1, characterized in that: The bottom surface of the first support plate (1) is provided with an installation groove (81), and a bearing (82) is provided in the installation groove (81). The inner ring of the bearing (82) is fixed to the outer wall of the lead screw.

9. The electric booster cylinder according to claim 2, characterized in that: The upper and lower surfaces of the lead screw nut (32) are both fitted with sealing gaskets (9).

10. The electric booster cylinder according to claim 1, characterized in that: A sealing groove (91) is provided in the support (22), and a sliding sealing ring (92) is installed in the sealing groove (91). A protective component (93) for protecting the drive assembly (4) is installed on the upper surface of the first support plate.

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