Electric cylinder for lifting the front of a vehicle

Abstract

The application relates to the technical field of electric cylinders, in particular to an electric cylinder for lifting a vehicle head, which comprises a shell, a driving device, a ball screw, an extendable protective net, a piston cylinder, a lubricating mechanism, a recycling mechanism and a closing plate; a working area, an oil storage area and a recycling area are formed in the shell; the driving device comprises a servo motor, a driving wheel and a driven wheel, the driven wheel is fixedly connected with the ball screw; the ball screw is composed of a planetary screw and a screw nut, the screw nut is connected with the shell through the extendable protective net, and the screw nut is fixedly provided with the piston cylinder; the lubricating mechanism is arranged below the driving wheel, and the driving wheel drives lubricating oil to flow out through the lubricating mechanism; the recycling mechanism is arranged above the lubricating mechanism, the closing plate is arranged on the recycling mechanism, and the lubricating mechanism drives the closing plate through the recycling mechanism; the electric cylinder is convenient to disassemble and maintain through the extendable protective net, and the working safety of the electric cylinder is improved through the extendable protective net.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric cylinders, in particular to an electric cylinder for lifting a truck head. BACKGROUND

[0002] An electric cylinder is a high-precision transmission device that realizes linear motion driven by electric energy. Compared with traditional hydraulic driving, it has lower noise level and more stable operation accuracy. In addition, it also has the advantages of fast response, excellent accuracy and repeatability.

[0003] The electric cylinder mainly comprises a shell, a motor, a transmission device, a ball screw, a cylinder barrel and a piston barrel. The motor is fixedly installed on the shell. The motor is connected with the transmission device. The transmission device is connected with the ball screw. The transmission device can be a gear transmission. Two gears are connected with the motor and the ball screw respectively. The ball screw is fixedly connected with the piston barrel. The piston barrel is slidingly connected with the cylinder barrel. The cylinder barrel is fixedly connected with the shell. The cylinder barrel plays a lead role and a sealing role on the piston barrel. When the electric cylinder is used, the motor is started. The motor drives the ball screw to rotate through the gears. The screw nut of the ball screw drives the piston barrel to move synchronously. The piston barrel extends from the cylinder barrel to lift the truck head.

[0004] When lubricating the ball screw, the cylinder barrel and the piston barrel need to be disassembled, and then the ball screw is lubricated with lubricating oil. This lubrication method is complex and inefficient. Moreover, when lifting the truck head, it is difficult to disassemble the electric cylinder, which causes the problem of inconvenient lubrication.

[0005] In view of this, we propose an electric cylinder for lifting a truck head. SUMMARY

[0006] The purpose of the present application is to provide an electric cylinder for lifting a truck head to solve the problem of inconvenient lubrication of the ball screw of the electric cylinder as described in the background.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0008] An electric cylinder for lifting a truck head comprises a shell, a driving device, a lubricating mechanism, a recycling mechanism and a closure plate. The shell is composed of an upper cover and a bottom shell fixedly connected. The bottom shell is provided with a working area, an oil storage area and a recycling area. The oil storage area and the recycling area are arranged on one side of the working area, and the oil storage area is located above the recycling area. A recycling hole is formed in the oil storage area, and a sealing hole is formed in the recycling area. The oil storage area is used for storing lubricating oil. The oil storage area is provided with an oil supplementing hole (not shown in the figure) for supplementing lubricating oil. The recycling area is used for recycling the excess lubricating oil after lubrication, avoiding waste of lubricating oil and improving the utilization efficiency of lubricating oil. The driving device is fixedly installed on the upper cover.

[0009] The driving device comprises a servo motor, a driving wheel and a driven wheel, the servo motor is installed on the upper cover, the servo motor is provided with the driving wheel, the driving wheel is located in the working area, one side of the driving wheel is provided with the driven wheel, the driven wheel is fixedly connected with the ball screw, the driven wheel is provided with the arc-shaped groove matched with the sealing hole, the servo motor provides power for the starting of the electric cylinder to realize the lifting of the truck head, the servo motor drives the driving wheel fixedly connected with the servo motor to rotate synchronously after starting, the driving wheel is engaged with the driven wheel to drive the driven wheel to rotate, and the driven wheel drives the ball screw to move; the arc-shaped groove of the driven wheel is used for the circulation of excess lubricating oil, the lubricating oil enters the sealing hole through the arc-shaped groove to complete the recycling;

[0010] The ball screw is composed of a planetary screw and a screw nut, the planetary screw is rotatably installed on the upper cover through a bearing, and the lower end of the planetary screw is located in the oil storage area; an oil guide hole is formed in the center of the planetary screw; the screw nut is slidably installed on the planetary screw, the screw nut is connected with the shell through the telescopic protective net, and the piston cylinder is installed on the screw nut; when the electric cylinder works, the driven wheel drives the planetary screw to rotate synchronously, the planetary screw drives the screw nut to slide horizontally, the screw nut drives the piston cylinder to slide out horizontally to realize the lifting of the truck head; during the sliding of the screw nut, the screw nut drives the telescopic protective net to move synchronously, the telescopic protective net seals the inside of the electric cylinder, prevents dust and impurities from entering the electric cylinder, and affects the normal work of the electric cylinder.

[0011] The lubricating mechanism is arranged below the driving wheel, the lubricating mechanism is driven by the driving wheel to drive the lubricating oil to flow out of the oil guide hole to lubricate the ball screw; when the electric cylinder is started to extend, the servo motor drives the driving wheel to rotate, the driving wheel drives the lubricating mechanism, the lubricating mechanism extrudes the lubricating oil to flow into the oil guide hole from the oil storage area and flow out along the oil guide hole, the lubricating oil flows out of the oil guide hole and slides vertically downward under the action of gravity, and then slides downward along the planetary screw to lubricate the planetary screw; the recovery mechanism is arranged above the lubricating mechanism, the recovery mechanism is provided with a closing plate, the closing plate is located in the recovery area, the lubricating mechanism drives the closing plate to open the sealing hole to recover the lubricating oil through the recovery mechanism, and the lubricating mechanism drives the closing plate to slide and open the sealing hole through the recovery mechanism; when the lubricating oil flows to the bottom shell, the lubricating oil falls into the recovery area from the sealing hole, and then falls into the oil storage area from the recovery hole for recycling.

[0012] Preferably, the lubricating mechanism comprises a transmission shaft, a transmission wheel, a transmission rod, an L-shaped ejector rod and an oil feeding plate; the transmission shaft is fixedly connected with the driving wheel, and the transmission shaft is rotatably installed in the working area; the transmission wheel is fixedly connected with the transmission shaft; when the electric cylinder works, the servo motor starts to drive the driving wheel to rotate synchronously, the driving wheel drives the transmission shaft to rotate synchronously, and the transmission shaft drives the fixedly connected transmission wheel to rotate synchronously; the transmission wheel is located in the transmission rod; a strip-shaped groove is formed in the transmission rod, the transmission wheel is rotatably installed in the strip-shaped groove, and the strip-shaped groove is provided with gear teeth matched with the transmission wheel; when the transmission wheel rotates, the gear teeth in the strip-shaped groove of the transmission rod are engaged, thereby driving the transmission rod to slide in the direction of the oil storage area; the transmission rod is provided with an L-shaped ejector rod; one end of the L-shaped ejector rod is located in the oil storage area, the L-shaped ejector rod is fixedly connected with the oil feeding plate, and the L-shaped ejector rod is located at the center of the oil feeding plate; the oil feeding plate is slidably installed in the oil storage area; when the transmission rod slides horizontally, the L-shaped ejector rod moves synchronously; the L-shaped ejector rod is arranged in a shape such that one end of the L-shaped ejector rod is located at the center of the oil feeding plate, thereby ensuring that the force of the L-shaped ejector rod acting on the oil feeding plate is uniformly distributed on the oil feeding plate when the L-shaped ejector rod slides horizontally with the transmission rod, so as to ensure the stability of the sliding of the oil feeding plate and enable the oil feeding plate to efficiently extrude the lubricating oil, so that the lubricating oil is quickly discharged from the oil guiding hole, and the ball screw and the bearing are lubricated.

[0013] Preferably, the oil guiding hole is in a whole conical structure, and a buffer arc surface is formed at the top end of the oil guiding hole; the oil guiding hole is in a whole conical structure, the diameter of the lower end of the conical structure is larger than that of the upper end, so that the efficiency of the lubricating oil entering the oil guiding hole can be improved, the lubricating oil is pressurized through the gradually decreasing diameter, so that the flow rate of the lubricating oil is increased, the lubricating oil can flow out of the oil guiding hole more easily, the buffer arc surface of the oil guiding hole guides the flow of the lubricating oil, reduces the resistance of the lubricating oil flowing out of the oil guiding hole, and avoids the lubricating oil flowing out at a right angle.

[0014] Preferably, the oil storage area is symmetrically provided with return blocks away from the oil feeding plate, and the two return blocks form a return arc surface; the return arc surface formed by the return blocks guides the flow direction of the lubricating oil; when the oil feeding plate pushes the lubricating oil to flow in the direction of the return blocks, the lubricating oil contacts the return arc surface and flows along the return arc surface, thereby reducing the reaction force of the inner wall of the oil storage area on the lubricating oil and avoiding the lubricating oil generating a large vortex to affect the flow of the lubricating oil.

[0015] Preferably, the oil feeding plate is in the form of a right trapezoid, and a flow guide surface is arranged on the inclined surface of the right trapezoid, and the inclined surface is opposite to the backflow arc surface, and the right trapezoid structure of the oil feeding plate cooperates with the backflow arc surface to realize the circulation of the lubricating oil; the circulation of the lubricating oil makes the lubricating oil uniformly distributed in the oil storage area, and causes disturbance to the lubricating oil, so that the internal components of the lubricating oil are uniformly distributed, and the phenomenon of stratification of the lubricating oil caused by the lubricating oil in a static state when the electric cylinder is not working is avoided; meanwhile, the circulation of the lubricating oil reduces the generation of irregular vortexes, improves the efficiency of the lubricating oil entering the flow guide hole, and further improves the lubricating efficiency.

[0016] Preferably, the recovery mechanism comprises staggered plates, a driving rack, a transfer wheel, a driven rack and a synchronization rod; the two staggered plates are slidably installed on the oil storage area; a chute is formed on the oil storage area, and the staggered plates are slidably installed in the chute; the staggered plates are symmetrically installed on the oil feeding plate; the staggered plates are provided with recovery holes matched with staggered holes, when the oil feeding plate slides horizontally, the oil feeding plate drives the staggered plates to move synchronously, the staggered holes in the staggered plates are staggered with the recovery holes, and the recovery holes are closed; at this time, the staggered plates seal the oil storage area, and only the flow guide holes in the oil storage area are connected with the outside, when the oil feeding plate slides horizontally to press the lubricating oil, the lubricating oil can only flow out along the flow guide holes, and meanwhile, the pressure in the oil storage area is increased to accelerate the lubricating oil entering the flow guide holes; the driving racks are fixedly installed on one side of each of the two staggered plates; the transfer wheel is arranged on one side of the driving rack; the driven rack is arranged on one side of the transfer wheel; the driven rack is symmetrically installed with the driving rack, and the synchronization rod is fixedly installed on the driven rack; the synchronization rod is fixedly installed with the closing plate; the closing plate is provided with a closing hole matched with the sealing hole; when the staggered plates slide horizontally, the driving racks fixedly connected to the staggered plates slide synchronously, the driving racks are engaged with the transfer wheel to drive the transfer wheel to rotate, the transfer wheel drives the driven rack to slide horizontally, the driven rack drives the closing plate to move synchronously through the synchronization plate, the closing hole of the closing plate is communicated with the sealing hole, the sealing hole is opened to recover the falling lubricating oil, and the utilization efficiency of the lubricating oil is improved.

[0017] Preferably, the misplacement plate is provided with a clamping groove, the clamping groove is a regular triangle structure; the oil feeding plate is provided with a telescopic clamping block matched with the clamping groove, the telescopic clamping block is slidably installed in the oil feeding plate through a telescopic spring, when the oil feeding plate slides horizontally, the oil feeding plate extrudes the clamping groove through the telescopic clamping block and drives the misplacement plate to move synchronously, when the misplacement plate closes the recovery hole, the misplacement plate is just moved to the top end of the sliding groove, at this time, the misplacement plate keeps stationary, the oil feeding plate continues to slide to extrude the lubricating oil from the oil guide hole, at this time, the telescopic sliding block extrudes the telescopic spring and slides into the oil feeding plate under the action of the clamping groove, so that the oil feeding plate normally slides, when the electric cylinder needs to be reset after work, the oil feeding plate is reversely slid to reset under the drive of the servo motor, at this time, the oil feeding plate first drives the misplacement plate to reset synchronously, the misplacement plate opens the recovery hole, at the same time, the closing plate slides to reset and close the sealing hole, the recovery area and the oil storage area are sealed, the oil feeding plate continues to slide, at this time, the suction force generated by the sliding of the oil feeding plate drives the lubricating oil in the recovery area to enter the oil storage cavity through the recovery hole, so that the lubricating oil is prevented from remaining in the recovery area, and the recovery efficiency of the lubricating oil is improved.

[0018] Preferably, the oil feeding plate is provided with a connecting block, the connecting block is connected with the inner wall of the sliding groove through a folding plate, the folding plate is used to ensure the sealing property of the sliding groove, so that the lubricating oil is prevented from flowing out and falling behind the oil feeding plate through the gap between the oil feeding plate and the oil storage area, and the available lubricating oil is reduced, and the normal consumption of the lubricating oil is affected.

[0019] Preferably, the closing hole is fixedly provided with a filter screen, the filter screen is used to filter the lubricating oil falling from the ball screw, so that the metal particles worn down during the movement of the ball screw are prevented from falling into the oil storage area synchronously with the lubricating oil, the quality of the lubricating oil in the oil storage area is affected, and the lubricating efficiency is reduced.

[0020] Preferably, the piston cylinder is provided with a traction column matched with the oil guide hole, the traction column is matched with the closing plate to seal the oil tank, and the traction column is used to block the oil guide hole, when the electric cylinder is in a non-working state, the closing hole of the closing plate is misaligned with the sealing hole to close the sealing hole, the traction column closes the oil guide hole, so that the lubricating oil in the oil storage area is in a sealed state, the influence of oxygen on the lubricating oil is reduced, the lubricating oil is prevented from being rapidly oxidized to cause deterioration of the lubricating oil, the lubricating effect is reduced, at the same time, when the electric cylinder works, the traction column vertically slides upward along the oil guide hole to play a role of traction and suction on the lubricating oil in the oil guide hole, the speed and efficiency of the lubricating oil flowing out of the oil guide hole are accelerated, and the lubricating efficiency of the ball screw is improved.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] An electric cylinder for lifting the front of a vehicle. This invention reduces the overall size of the electric cylinder by replacing the cylinder barrel with a telescopic protective net. At the same time, it makes the electric cylinder easier to disassemble and maintain, and improves the safety of the electric cylinder during operation through the telescopic protective net.

[0023] An electric cylinder for lifting the front of a vehicle is disclosed. This invention achieves intermittent lubrication by using a lubrication component and a recovery component to follow the operation of the electric cylinder, thereby reducing mechanical wear inside the electric cylinder and improving the quality and service life of the electric cylinder.

[0024] An electric cylinder for lifting the front of a vehicle. This invention realizes the circulation of lubricating oil through a lubrication component and a recovery component, thereby achieving efficient utilization of lubricating oil and avoiding waste. At the same time, it achieves sealing and filtration of lubricating oil, avoiding the influence of oxygen and impurities on the lubricating oil and ensuring the quality of lubricating oil. Attached Figure Description

[0025] Figure 1 This is an overall view of the electric cylinder of the present invention;

[0026] Figure 2 This is a vertical sectional view of the electric cylinder of the present invention;

[0027] Figure 3 For the present invention Figure 2 A magnified view of point A;

[0028] Figure 4 This is a half-sectional schematic diagram of the electric cylinder of the present invention;

[0029] Figure 5 For the present invention Figure 4 A magnified view of point B;

[0030] Figure 6 For the present invention Figure 4 A magnified view of point C;

[0031] Figure 7 This is an overall schematic diagram of the lubrication mechanism and the recovery mechanism of the present invention;

[0032] Figure 8 This is a half-sectional schematic diagram of the bottom shell of the present invention;

[0033] Figure 9 For the present invention Figure 8 A magnified view of point D;

[0034] Figure 10 For the present invention Figure 8 A magnified view of point E;

[0035] Figure 11 This is a schematic diagram of the oil delivery plate of the present invention.

[0036] In the picture:

[0037] 1. Shell; 11. Top cover; 12. Bottom shell; 121. Working area; 122. Oil storage area; 1221. Recovery hole; 1222. Return block; 1223. Return arc surface; 1224. Slide groove; 123. Recovery area; 1231. Sealing hole;

[0038] 2. Drive unit; 21. Servo motor; 22. Drive wheel; 23. Driven wheel;

[0039] 3. Ball screw; 31. Planetary screw; 311. Oil guide hole; 3111. Conical structure; 3112. Buffer arc surface; 32. Screw nut;

[0040] 4. Retractable protective netting;

[0041] 5. Piston cylinder; 51. Traction column;

[0042] 6. Lubrication mechanism; 61. Drive shaft; 62. Drive wheel; 63. Drive rod; 631. Strip groove; 64. L-shaped push rod; 65. Oil delivery plate; 651. Right-angled trapezoidal structure; 652. Inclined surface; 653. Drainage surface; 654. Telescopic block; 655. Telescopic spring; 656. Connecting block; 657. Folding plate;

[0043] 7. Recycling mechanism; 71. Misalignment plate; 711. Misalignment hole; 712. Slot; 713. Equilateral triangle structure; 72. Driving rack; 73. Central rotating wheel; 74. Driven rack; 75. Synchronizing rod;

[0044] 8. Closed plate; 81. Closed hole; 82. Filter screen. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] The electric cylinder mainly consists of a housing, motor, transmission device, ball screw, cylinder barrel, and piston barrel. The motor is fixedly mounted on the housing and connected to the transmission device, which in turn connects to the ball screw. The transmission device can be a gear drive, with two gears connected to the motor and ball screw respectively. The ball screw is fixedly connected to the piston barrel, while the piston barrel is slidably connected to the cylinder barrel. The cylinder barrel is fixedly connected to the housing, acting as a guide and seal for the piston barrel. When the electric cylinder is in use, the motor starts, driving the ball screw to rotate via the gears. The ball screw nut drives the piston barrel to move synchronously, causing the piston barrel to extend from the cylinder barrel and lift the truck cab.

[0047] When lubricating a ball screw, the cylinder and piston cylinder need to be disassembled before lubricating the ball screw with lubricating oil. This lubrication method is complicated and inefficient. Furthermore, it is difficult to disassemble the electric cylinder when lifting the truck cab, which leads to lubrication problems. In addition, the truck cab is heavy, and insufficient lubrication when lifting the truck cab will cause the moving parts of the ball screw to be subjected to greater forces, thereby aggravating the wear of the ball screw.

[0048] The present invention provides a technical solution:

[0049] like Figures 1 to 11 As shown, an electric cylinder for lifting the front of a vehicle includes: a housing 1, a drive unit 2, a lubrication mechanism 6, a recovery mechanism 7, and a closing plate 8; the housing 1 is composed of an upper cover 11 and a bottom shell 12 fixedly connected, the bottom shell 12 having a working area 121, an oil storage area 122, and a recovery area 123, the oil storage area 122 having a recovery hole 1221, and the recovery area 123 having a sealing hole 1231; the drive unit 2 includes a servo motor 21, a drive wheel 22, and a driven wheel 23, the servo motor 21 being mounted on the upper cover 11, the drive wheel 22 being mounted on the servo motor 21, and the driven wheel 23 being located on one side of the drive wheel 22. The driving wheel 23 is fixedly connected to the ball screw 3; the ball screw 3 is composed of a planetary screw 31 and a screw nut 32, and the planetary screw 31 has an oil guide hole 311 in the center; the screw nut 32 is connected to the housing 1 through a telescopic protective net 4, and a piston cylinder 5 is fixedly installed on the screw nut 32; a lubrication mechanism 6 is provided below the driving wheel 22, and the driving wheel 22 drives the lubricating oil to flow out from the oil guide hole 311 to lubricate the ball screw 3 through the lubrication mechanism 6; a recovery mechanism 7 is provided above the lubrication mechanism 6, and a closing plate 8 is provided on the recovery mechanism 7, and the lubrication mechanism 6 drives the closing plate 8 to open the sealing hole 1231 to recover the lubricating oil through the recovery mechanism 7;

[0050] Specifically, the housing 1 is composed of an upper cover 11 and a bottom cover 12 fixedly connected. A working area 121 is provided inside the bottom cover 12. An oil storage area 122 and a recovery area 123 are provided on one side of the working area 121, with the oil storage area 122 located above the recovery area 123. A recovery hole 1221 is provided on the oil storage area 122, and a sealing hole 1231 is provided on the recovery area 123. The oil storage area 122 is used to store lubricating oil, and a replenishment hole (not shown in the figure) is provided on the oil storage area 122 for replenishing the lubricating oil. The recovery area 123 is used to recycle excess lubricating oil after lubrication, avoiding waste and improving the utilization efficiency of the lubricating oil. The lubricating oil falls from the sealing hole 1231 into the recovery area 123, and then from the recovery area 123 through the recovery hole 1221 back into the oil storage area 122 for recycling. A drive device 2 is fixedly installed on the upper cover 11.

[0051] The drive unit 2 includes a servo motor 21, a drive wheel 22, and a driven wheel 23. The servo motor 21 is fixedly mounted on the upper cover 11, and the drive wheel 22 is fixedly mounted on the servo motor 21. The drive wheel 22 is located within the working area 121. The driven wheel 23 is located on one side of the drive wheel 22 and is fixedly connected to the ball screw 3. The driven wheel 23 has an arc-shaped groove that mates with the sealing hole 1231. The servo motor 21 provides power for starting the electric cylinder, thereby lifting the truck cab. The servo motor 21 is a motor with a braking function, thus enabling emergency stops and starts, and allowing for lifting of the truck cab at different angles. The servo motor 21 starts and drives the drive wheel 22, which is fixedly connected to it, to rotate synchronously. The drive wheel 22 meshes with the driven wheel 23, driving the driven wheel 23 to rotate. The driven wheel 23 drives the ball screw 3 to move. Preferably, a reducer can also be provided between the servo motor 21 and the drive wheel 22. The reducer can reduce the high-speed output of the servo motor 21 to a speed range suitable for the load, while maintaining high torque output, which is suitable for low-speed heavy-load conditions. The arc groove of the driven wheel 23 is used for the flow of excess lubricating oil. The lubricating oil enters the sealing hole 1231 through the arc groove, thereby completing the recycling.

[0052] The ball screw 3 consists of a planetary screw 31 and a screw nut 32. The planetary screw 31 is rotatably mounted to the upper cover 11 via bearings. The lower end of the planetary screw 31 is located in the oil storage area 122. An oil guide hole 311 communicating with the oil storage area 122 is opened in the center of the planetary screw 31. The screw nut 32 is slidably mounted on the planetary screw 31. The screw nut 32 is connected to the housing 1 via a telescopic protective net 4. A piston cylinder 5 is fixedly mounted on the screw nut 32. When the electric cylinder is working, the driven wheel 23 drives the planetary screw 31 to rotate synchronously, and the planetary screw 31 drives the screw nut 32. 2. Horizontal sliding: The lead screw nut 32 drives the piston cylinder 5 to slide horizontally out to lift the truck cab. During the sliding process of the lead screw nut 32, the lead screw nut 32 pulls the telescopic protective net 4 to move synchronously. The telescopic protective net 4 seals the inside of the electric cylinder to prevent external dust and impurities from entering the electric cylinder and affecting its normal operation. At the same time, by eliminating the cylinder barrel setting through the telescopic protective net 4, the overall structural size of the electric cylinder is reduced while playing a sealing connection role. This makes the electric cylinder easier to disassemble and maintain, and also facilitates subsequent disassembly and application of grease for deep lubrication.

[0053] Telescopic protective net 4 can protect mechanical equipment from external factors such as debris and dust, ensuring the normal operation of the equipment and extending its service life. At the same time, telescopic protective net 4 has good elasticity, so it can flexibly adapt to equipment and areas of different sizes and shapes, providing effective protection.

[0054] A lubrication mechanism 6 is located below the drive wheel 22. The drive wheel 22, through the lubrication mechanism 6, drives lubricating oil to flow from the oil guide hole 311, thereby lubricating the ball screw 3. When the electric cylinder starts and extends, the servo motor 21 drives the drive wheel 22 to rotate. The drive wheel 22 then drives the lubrication mechanism 6, which compresses the lubricating oil from the oil storage area 122 into the oil guide hole 311 and out along the oil guide hole 311. After flowing out of the oil guide hole 311, the lubricating oil slides vertically downwards under the action of gravity, and then slides downwards along the planetary screw 31, lubricating the planetary screw 31. Simultaneously, it lubricates the bearings to ensure the smooth operation of the electric cylinder. A recovery mechanism 7 is located above the lubrication mechanism 6. The recycling mechanism 7 is equipped with a closing plate 8, which is located in the recycling area 123. The lubrication mechanism 6 drives the closing plate 8 through the recycling mechanism 7 to open the sealing hole 1231 to recycle the lubricating oil. At the same time, the lubrication mechanism 6 drives the closing plate 8 through the recycling mechanism 7 to slide open the sealing hole 1231. When the lubricating oil flows to the bottom shell 12, the lubricating oil falls from the sealing hole 1231 into the recycling area 123, and then from the recycling area 123 through the recycling hole 1221 into the oil storage area 122 for recycling. When the electric cylinder is not started, the closing plate 8 closes the sealing hole 1231, thereby isolating oxygen and reducing the amount of oxygen entering the oil storage area 122, thus avoiding rapid oxidation of the lubricating oil and resulting in unsatisfactory lubrication effect.

[0055] In this embodiment, the lubrication mechanism 6 includes a drive shaft 61, a drive wheel 62, a drive rod 63, an L-shaped push rod 64, and an oil delivery plate 65; the drive shaft 61 is fixedly connected to the drive wheel 22, and the drive shaft 61 is rotatably mounted within the working area 121; the drive wheel 62 is fixedly connected to the drive shaft 61; the drive wheel 62 is located within the drive rod 63. The transmission rod 63 has a strip-shaped groove 631, and a transmission wheel 62 is rotatably mounted in the strip-shaped groove 631. The strip-shaped groove 631 has teeth that cooperate with the transmission wheel 62. The transmission rod 63 has an L-shaped push rod 64. One end of the L-shaped push rod 64 is located in the oil storage area 122. The L-shaped push rod 64 is fixedly connected to the oil delivery plate 65, and the L-shaped push rod 64 is located at the center of the oil delivery plate 65. The oil delivery plate 65 is slidably mounted in the oil storage area 122.

[0056] Specifically, the drive shaft 61 is fixedly connected to the drive wheel 22, and the drive shaft 61 is rotatably mounted within the working area 121; the drive wheel 62 is fixedly connected to the drive shaft 61; when the electric cylinder is working, the servo motor 21 starts, thereby driving the drive wheel 22 to rotate synchronously, the drive wheel 22 drives the drive shaft 61 to rotate synchronously, and the drive shaft 61 drives the fixedly connected drive wheel 62 to rotate synchronously; the drive wheel 62 is located inside the drive rod 63; a strip-shaped groove 631 is provided on the drive rod 63, and the drive wheel 62 is rotatably mounted in the strip-shaped groove 631. The strip-shaped groove 631 has gear teeth that mesh with the drive wheel 62. When the drive wheel 62 rotates, it meshes with the gear teeth in the strip-shaped groove 631 of the drive rod 63, thereby driving the drive rod 63 to slide along the direction of the oil storage area 122. The gear teeth in the strip-shaped groove 631 are symmetrically arranged, thereby ensuring that the drive rod 63 is subjected to force. Uniformity ensures the stability of the sliding of the transmission rod 63; the transmission rod 63 is provided with an L-shaped push rod 64; one end of the L-shaped push rod 64 is located in the oil storage area 122, and the L-shaped push rod 64 is fixedly connected to the oil delivery plate 65, with the L-shaped push rod 64 located at the center of the oil delivery plate 65; the oil delivery plate 65 is slidably installed in the oil storage area 122, and when the transmission rod 63 slides horizontally, it drives the L-shaped push rod 64 to move synchronously. The L-shaped push rod 64, through its own shape, makes one end of itself located at the center of the oil delivery plate 65, so that when it slides horizontally with the transmission rod 63, the force it exerts on the oil delivery plate 65 is evenly distributed on the oil delivery plate 65, thereby ensuring the stability of the sliding of the oil delivery plate 65, and enabling the oil delivery plate 65 to efficiently squeeze the lubricating oil, so that the lubricating oil is quickly discharged from the oil guide hole 311, realizing the lubrication of the ball screw 3 and the bearing.

[0057] In this embodiment, the oil guide hole 311 is a conical structure 3111, and a buffer arc surface 3112 is provided at the top of the conical structure 3111.

[0058] Specifically, the oil guide hole 311 has an overall conical structure 3111. This firstly reduces the flow rate of lubricating oil that needs to enter its interior, thereby reducing the pressure required for lubricating oil discharge and improving lubrication efficiency. Then, the conical structure 3111, with its larger diameter at the lower end and smaller diameter at the upper end, can accelerate the efficiency of lubricating oil entering the oil guide hole 311. At the same time, the gradually decreasing diameter pressurizes the lubricating oil, thereby increasing the flow rate of the lubricating oil and facilitating its flow out of the guide hole. The gentle flow surface on the guide hole guides the flow of lubricating oil, reducing the resistance to the flow of lubricating oil out of the guide hole and avoiding right-angle flow. In addition, after the oil delivery plate 65 finishes extruding, the lubricating oil that has not been discharged at the guide hole can flow back into the guide hole along the buffer surface and then enter the oil storage area 122 through the guide hole, improving the flow efficiency of the lubricating oil.

[0059] In this embodiment, the oil storage area 122 is symmetrically provided with return blocks 1222 on the side away from the oil delivery plate 65. The two return blocks 1222 form a return arc surface 1223. The return arc surface 1223 formed by the return blocks 1222 guides the flow direction of the lubricating oil. When the oil delivery plate 65 pushes the lubricating oil to flow along the direction of the return blocks 1222, the lubricating oil contacts the return arc surface 1223 and flows and circulates along the return arc surface 1223, thereby reducing the reaction force of the inner wall of the oil storage area 122 on the lubricating oil and avoiding the generation of large eddies in the lubricating oil that affect its flow.

[0060] In this embodiment, the oil delivery plate 65 is a right-angled trapezoidal structure 651, and the inclined surface 652 of the right-angled trapezoidal structure 651 is provided with a flow-guiding surface 653, and the inclined surface 652 is opposite to the return arc surface 1223.

[0061] Specifically, the right-angled trapezoidal mechanism of the oil delivery plate 65, in conjunction with the return arc surface 1223, enables the circulation of lubricating oil. When the oil delivery plate 65 slides horizontally to compress the lubricating oil, the lower width of the trapezoidal structure is greater than the upper width, resulting in greater compressive force on the lubricating oil located below the oil storage area 122. This causes the lubricating oil below to contact the lower return arc surface 1223 and flow upward along the return arc surface 1223, and then contact the guide surface. Under the slowing effect of the guide surface, it flows downward along the inclined surface 652 of the right-angled trapezoidal structure 651, achieving circulation. The circulation of lubricating oil ensures that it is evenly distributed within the oil storage area 122 and disturbs the lubricating oil, resulting in a uniform distribution of the internal components of the lubricating oil. This prevents the lubricating oil from being static when the electric cylinder is not working, which could lead to stratification. At the same time, the circulation of lubricating oil reduces the generation of irregular eddies, improves the efficiency of lubricating oil entering the guide hole, and thus improves lubrication efficiency.

[0062] In this embodiment, the recovery mechanism 7 includes a misalignment plate 71, an active rack 72, a central rotating wheel 73, a driven rack 74, and a synchronizing rod 75. Two misalignment plates 71 are slidably installed on the oil storage area 122. A groove 1224 is provided on the oil storage area 122, and the misalignment plate 71 is slidably installed within the groove 1224. The misalignment plates 71 are symmetrically installed on the oil delivery plate 65. Misalignment holes 711 that mate with the recovery hole 1221 are provided on the misalignment plates 71. Active racks 72 are fixedly installed on one side of each of the two misalignment plates 71. A central rotating wheel 73 is provided on one side of the active rack 72. A driven rack 74 is provided on one side of the central rotating wheel 73. The driven rack 74 is symmetrically installed with the active rack 72, and a synchronizing rod 75 is fixedly installed on the driven rack 74. A closing plate 8 is fixedly installed on the synchronizing rod 75. A closing hole 81 that mates with the sealing hole 1231 is provided on the closing plate 8.

[0063] Specifically, there are two misaligned plates 71, which are slidably installed in the oil storage area 122. A groove 1224 is provided on the oil storage area 122, and the misaligned plates 71 are slidably installed within the groove 1224. The misaligned plates 71 are symmetrically installed on the oil delivery plate 65. The misaligned plates 71 have misaligned holes 711 that cooperate with the recovery hole 1221. When the oil delivery plate 65 slides horizontally, it drives the misaligned plates 71 to move synchronously. The misaligned holes 711 on the misaligned plates 71 are misaligned with the recovery hole 1221, thus closing the recovery hole 1221. At this time, the misaligned plates 71 seal the oil storage area 122. Only the oil guide hole 311 in the oil storage area 122 is connected to the outside. When the oil delivery plate 65 slides horizontally and squeezes the lubricating oil, the lubricating oil can only flow out along the guide hole. At the same time, it increases the pressure in the oil storage area 122, accelerating the lubricating oil into the oil guide hole 311. The two misaligned plates 71... One side is fixedly equipped with an active rack 72; a central rotating wheel 73 is provided on one side of the active rack 72; a driven rack 74 is provided on one side of the central rotating wheel 73; the driven rack 74 is symmetrically installed with the active rack 72, and a synchronizing rod 75 is fixedly installed on the driven rack 74; a closing plate 8 is fixedly installed on the synchronizing rod 75; a closing hole 81 is provided on the closing plate 8 to cooperate with the sealing hole 1231; when the misaligned plate 71 slides horizontally, it drives the active rack 72 fixedly connected to it to slide synchronously, the active rack 72 meshes with the central rotating wheel 73, driving the central rotating wheel 73 to rotate, the central rotating wheel 73 rotates and drives the driven rack 74 to slide horizontally, the driven rack 74 drives the closing plate 8 to move synchronously through the synchronizing plate, the closing hole 81 of the closing plate 8 is connected to the sealing hole 1231, the sealing hole 1231 is opened to recover the falling lubricating oil, thereby improving the utilization efficiency of the lubricating oil.

[0064] In this embodiment, the misaligned plate 71 is provided with a slot 712, which is an equilateral triangle structure 713; the oil delivery plate 65 is provided with a telescopic block 654 that cooperates with the slot 712, and the telescopic block 654 is slidably installed in the oil delivery plate 65 by a telescopic spring 655.

[0065] Specifically, when the oil supply plate 65 slides horizontally, it presses against the slot 712 via the telescopic block 654, thereby driving the misalignment plate 71 to move synchronously. When the misalignment plate 71 closes the recovery hole 1221, it moves to the top of the slide groove 1224. At this time, the misalignment plate 71 remains fixed, while the oil supply plate 65 continues to slide, pressing the lubricating oil out of the oil guide hole 311. At this time, the telescopic slider, under the force of the slot 712, presses the telescopic spring 655 into the oil supply plate 65, allowing the oil supply plate 65 to slide normally. When the electric cylinder finishes working and needs to be reset, the servo motor 21 drives the oil supply plate 65 to reverse. During the sliding reset, the oil supply plate 65 first drives the misalignment plate 71 to move synchronously and reset. The misalignment plate 71 opens the recovery hole 1221. At the same time, the closing plate 8 slides and resets to close the sealing hole 1231, sealing the recovery area 123 and the oil storage area 122. The oil supply plate 65 continues to slide. At this time, the suction force generated by the sliding of the oil supply plate 65 drives the lubricating oil in the recovery area 123 to enter the oil storage chamber through the recovery hole 1221, avoiding lubricating oil residue in the recovery area 123 and improving the lubricating oil recovery efficiency. The equilateral triangle structure 713 ensures the stability of the bidirectional movement of the oil supply plate 65, thereby ensuring the stable operation of the equipment.

[0066] In this embodiment, the oil delivery plate 65 is provided with a connecting block 656, and the connecting block 656 is connected to the inner wall of the slide groove 1224 by a folding plate 657.

[0067] Specifically, the folding plate 657 is used to ensure the sealing of the chute 1224, thereby preventing lubricating oil from flowing out through the gap between the oil delivery plate 65 and the oil storage area 122 and falling behind the oil delivery plate 65, which would reduce the available lubricating oil and affect the normal consumption of lubricating oil.

[0068] In this embodiment, a filter screen 82 is fixedly installed inside the closed hole 81;

[0069] Specifically, filter 82 is used to filter the lubricating oil falling from the ball screw 3, so as to prevent the lubricating oil from containing metal particles worn off during the movement of the ball screw 3, which would fall into the oil storage area 122 along with the lubricating oil, affecting the quality of the lubricating oil in the oil storage area 122 and causing a decrease in lubrication efficiency.

[0070] In this embodiment, the piston cylinder 5 has a traction column 51 that cooperates with the oil guide hole 311, and the traction column 51 cooperates with the closing plate 8 to seal the oil tank.

[0071] Specifically, the traction column 51 is used to block the oil guide hole 311. When the electric cylinder is not working, the closing hole 81 of the closing plate 8 is misaligned with the sealing hole 1231 to close the sealing hole 1231. The traction column 51 closes the oil guide hole 311, so that the lubricating oil in the oil storage area 122 is in a sealed state, thereby reducing the influence of oxygen on the lubricating oil and preventing the lubricating oil from rapidly oxidizing and deteriorating, thus reducing the lubrication effect. At the same time, when the electric cylinder is working, the traction column 51 slides vertically upward along the oil guide hole 311 to pull and suck the lubricating oil in the oil guide hole 311, accelerating the speed and efficiency of the lubricating oil flowing out of the oil guide hole 311 and improving the lubrication efficiency of the ball screw 3.

[0072] In use, the electric cylinder for lifting the truck cab of the present invention operates as follows: When the electric cylinder is working, the servo motor 21 drives the drive wheel 22 to rotate, the drive wheel 22 drives the driven wheel 23 to rotate, the driven wheel 23 drives the ball screw 3 to work, the ball screw 3 drives the piston cylinder 5 to extend and lift the truck cab, and the piston cylinder 5 drives the traction column 51 to be pulled out from the oil guide hole 311; at the same time, the drive wheel 22 drives the transmission wheel 62 to rotate through the transmission shaft 61, the transmission wheel 62 drives the transmission rod 63 to slide horizontally, and the transmission rod 63 drives the L-shaped... The push rod 64 moves synchronously, and the L-shaped push rod 64 pushes the oil delivery plate 65 to slide along the direction of the oil storage area 122 to squeeze the lubricating oil out of the oil guide hole 311; the oil delivery plate 65 drives the misalignment plate 71 to move synchronously, and the misalignment plate 71 blocks the recovery hole 1221; the misalignment plate 71 drives the active rack 72 to slide synchronously, the active rack 72 drives the central rotating wheel 73 to rotate, the central rotating wheel 73 drives the driven rack 74 to slide, and the driven rack 74 drives the closing plate 8 to open the sealing hole 1231 to recover the lubricating oil through the synchronous rod 75;

[0073] When the electric lever resets, the servo motor 21 reverses, thereby driving the drive wheel 22 to reverse. The drive wheel 22 drives the driven wheel 23 to reverse, and the driven wheel 23 drives the piston cylinder 5 to reset via the ball screw 3. Simultaneously, the drive wheel 22 drives the transmission wheel 62 to reverse via the transmission shaft 61. The transmission wheel 62 pulls the transmission rod 63 to reset, and the transmission rod 63 drives the L-shaped push rod 64 to reset. The L-shaped push rod 64 pulls the oil delivery rod to reset, and the oil delivery rod drives the misalignment plate 71 to reset. The misalignment plate 71 opens the recovery hole 1221. When the misalignment plate 71 slides, it drives the drive rack 72 to move synchronously to reset. The drive rack 72 drives the intermediate rotating wheel 73 to reverse, and the intermediate rotating wheel 73 drives the driven rack 74 to reset. The driven rack 74 drives the closing plate 8 to reset via the synchronizing rod 75. The closing plate 8 closes the sealing hole 1231, and the traction column 51 closes the oil guide hole 311, thus ending the operation.

[0074] The foregoing has shown and described 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 embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric cylinder for lifting the front of a vehicle, characterized in that, include: Housing (1), drive unit (2), lubrication mechanism (6), recycling mechanism (7) and closing plate (8); The housing (1) is composed of an upper cover (11) and a bottom shell (12). The bottom shell (12) has a working area (121), an oil storage area (122) and a recovery area (123). The oil storage area (122) has a recovery hole (1221) and the recovery area (123) has a sealing hole (1231). The drive device (2) includes a servo motor (21), a drive wheel (22) and a driven wheel (23). The servo motor (21) is mounted on the upper cover (11), and the drive wheel (22) is mounted on the servo motor (21). The driven wheel (23) is provided on one side of the drive wheel (22), and the driven wheel (23) is connected to the ball screw (3). The ball screw (3) is composed of a planetary screw (31) and a screw nut (32). The planetary screw (31) has an oil guide hole (311) in the center. The screw nut (32) is connected to the housing (1) through a telescopic protective net (4), and a piston cylinder (5) is installed on the screw nut (32). The drive wheel (22) is provided with a lubrication mechanism (6) below it. The drive wheel (22) drives the lubricating oil to flow out from the oil guide hole (311) through the lubrication mechanism (6) to lubricate the ball screw (3). The lubrication mechanism (6) includes a drive shaft (61), a drive wheel (62), a drive rod (63), an L-shaped push rod (64), and an oil delivery plate (65). The drive shaft (61) is fixedly connected to the drive wheel (22), and the drive shaft (61) is rotatably mounted in the working area (121); The transmission wheel (62) is fixedly connected to the transmission shaft (61), and the transmission wheel (62) is located inside the transmission rod (63); The transmission rod (63) has a strip groove (631) and a transmission wheel (62) is rotatably installed in the strip groove (631). The strip groove (631) has teeth that cooperate with the transmission wheel (62). The transmission rod (63) is provided with an L-shaped top rod (64). One end of the L-shaped push rod (64) is located in the oil storage area (122), the L-shaped push rod (64) is fixedly connected to the oil delivery plate (65), and the L-shaped push rod (64) is located at the center of the oil delivery plate (65); The oil delivery plate (65) is slidably installed in the oil storage area (122); The lubrication mechanism (6) is provided with a recycling mechanism (7) above it, and a closing plate (8) is provided on the recycling mechanism (7). The lubrication mechanism (6) drives the closing plate (8) to open the sealing hole (1231) to recycle the lubricating oil through the recycling mechanism (7). The recycling mechanism (7) includes a misalignment plate (71), an active rack (72), a central rotating wheel (73), a driven rack (74), and a synchronizing rod (75). There are two misaligned plates (71), which are slidably installed in the oil storage area (122). A groove (1224) is provided on the oil storage area (122), and a misalignment plate (71) is slidably installed in the groove (1224). The misaligned plates (71) are symmetrically installed on the oil delivery plate (65); the misaligned plates (71) are provided with misaligned holes (711) that cooperate with the recovery holes (1221), and active racks (72) are fixedly installed on one side of both misaligned plates (71). A central rotating wheel (73) is provided on one side of the active rack (72); A driven rack (74) is provided on one side of the central rotating wheel (73); The driven rack (74) and the driving rack (72) are symmetrically installed, and a synchronizing rod (75) is fixedly installed on the driven rack (74). A closing plate (8) is fixedly installed on the synchronizing rod (75); The closing plate (8) has a closing hole (81) that matches the sealing hole (1231).

2. The electric cylinder according to claim 1, characterized in that: The oil guide hole (311) is a conical structure (3111) with a buffer arc surface (3112) at the top of the conical structure (3111).

3. The electric cylinder according to claim 1, characterized in that: The oil storage area (122) is symmetrically provided with reflux blocks (1222) on the side away from the oil delivery plate (65), and the two reflux blocks (1222) form a reflux arc surface (1223).

4. The electric cylinder according to claim 3, characterized in that: The oil delivery plate (65) is a right-angled trapezoidal structure (651). The inclined surface (652) of the right-angled trapezoidal structure (651) is provided with a flow-guiding surface (653). The inclined surface (652) is opposite to the return arc surface (1223).

5. The electric cylinder according to claim 4, characterized in that: The misaligned plate (71) has a slot (712) which is an equilateral triangle structure (713). The oil delivery plate (65) is provided with a telescopic block (654) that cooperates with the slot (712). The telescopic block (654) is slidably installed in the oil delivery plate (65) by a telescopic spring (655).

6. The electric cylinder according to claim 5, characterized in that: The oil delivery plate (65) is provided with a connecting block (656), and the connecting block (656) is connected to the inner wall of the slide groove (1224) by a folding plate (657).

7. The electric cylinder according to claim 1, characterized in that: A filter screen (82) is fixedly installed inside the closed hole (81).

8. The electric cylinder according to claim 7, characterized in that: The piston cylinder (5) has a traction column (51) that cooperates with the oil guide hole (311), and the traction column (51) cooperates with the closing plate (8) to seal the oil tank.

Images