Electric lifting cylinder capable of realizing abnormally-moving function

Abstract

The utility model discloses an electric lifting cylinder capable of achieving a abnormally-moving function, and belongs to the technical field of mechanical design and manufacturing. The utility model aims to provide the electric lifting cylinder capable of realizing the abnormally-moving function, which is used for lifting a cab of a heavy-load vehicle type by adopting the electric lifting cylinder. The device comprises a rod end, a cylinder barrel, a direct current motor with a brake, a planetary reducer and a U-shaped clamp, the U-shaped clamp is fixedly installed on a gear box, the gear box is installed on a base, the base is buckled below the planetary reducer and a bearing base, and a driving gear, a center gear and a driven gear are all arranged in the gear box. According to the utility model, the electric mechanical cylinder is applied to the lifting work of the cab of a heavy-duty vehicle, and the electric mechanical lifting cylinder is completed by adopting mechanical transmission, so that the maintenance and the use are relatively convenient, and the maintenance operation environment is not strict compared with that of a hydraulic lifting cylinder, so that ordinary personnel can easily master the operation skillfully, and the maintenance efficiency is greatly improved. Therefore, the utility model has the advantages of energy conservation, environmental protection, low maintenance cost, fast response speed, strong environmental adaptability and relatively high safety.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the mechanical design and manufacturing technical field, especially special vehicle working device in lifting, hoisting device. BACKGROUND

[0002] The lifting cylinder is a working device widely used in industrial production, which is generally divided into hydraulic lifting cylinder, mechanical lifting cylinder and electric lifting cylinder. Due to the advantages of the hydraulic lifting cylinder, the existing industrial production activities are widely used, generally 3-5 times of the mechanical lifting cylinder. The mechanical lifting cylinder can only be applied to some specific scenes. In the light industry, electronics and emerging automation fields, the growth rate is remarkable, but the overall market share is still lower than that of the hydraulic lifting cylinder. The existing automobile cab lifting is divided into heavy load vehicle (tonnage 1.5-3 ton truck, engineering vehicle, etc.) and light load vehicle (0.8-1.5 ton city logistics truck, light truck, etc.). For heavy load cab lifting, hydraulic lifting cylinder is generally used, and for light load cab lifting, electric lifting cylinder is used. For heavy load cab lifting, electric mechanical lifting cylinder is not used. SUMMARY

[0003] The utility model discloses a kind of electric lifting cylinders for heavy load vehicle cab lifting, which can realize the function of dynamic function.

[0004] The utility model discloses a rod end, cylinder, brake direct current motor with, planetary reducer, U type clamp, U type clamp is fixedly installed on gear box, gear box is installed on base, base is buckled in planetary reducer and bearing base below;The output shaft of planetary reducer is installed with driving gear through the end of base, driving gear is engaged with center gear, center gear is installed by stud type roller bearing and thrust bearing, stud type roller bearing top end is installed on base, center gear is engaged with driven gear, driven gear is installed in planetary roller screw bottom end, driving gear, center gear and driven gear are placed in gear box;Planetary roller screw is installed in bearing base by double row angular contact ball bearing, bearing base is fixedly installed on cylinder;Flange single nut of screw match is sleeved on planetary roller screw, flange single nut is fixedly installed on nut base, hollow piston rod bottom end is fixed on nut base, the base of rod end is installed on hollow piston rod top end by screw thread, and it is fastened by transverse screw pin, planetary roller screw top end installs deep groove ball bearing, and deep groove ball bearing outer tile is in contact with hollow piston rod inner wall;Sealing guide sleeve is installed between cylinder top end inner wall and hollow piston rod outer wall.

[0005] This utility model applies an electromechanical cylinder to the lifting operation of the cab of a heavy-duty vehicle. Since the electromechanical lifting cylinder uses mechanical transmission, it is relatively convenient to maintain and use. Moreover, the operating environment for maintenance is not as strict as that for hydraulic lifting cylinders. Therefore, ordinary personnel can easily master it. As a result, this utility model is energy-saving and environmentally friendly, has low maintenance costs, fast response speed, strong environmental adaptability, and relatively high safety. Attached Figure Description

[0006] Figure 1 This is an external schematic diagram of the overall structure of this utility model;

[0007] Figure 2 This is a cross-sectional view of one end of the U-shaped clamp of this utility model;

[0008] Figure 3 This is a structural cross-sectional view of one end of the rod of this utility model. Detailed Implementation

[0009] See Figure 1 This utility model includes a rod end 1, a cylinder 3, a DC motor with brake 4, a planetary gearbox 5, and a U-shaped clamp 6. The rod end 1 and U-shaped clamp 6 are the normal connecting parts installed at the bottom of the cab and on the frame, and their working principle is the same as that of existing hydraulic lifting cylinder rod ends 1 and U-shaped clamps 6. The braked DC motor is a DC drive motor with an integrated electromagnetic or mechanical braking device. It can quickly lock the rotor position when power is lost or interrupted, preventing the load from shifting due to inertia or gravity. Due to its outstanding performance in safety, control precision, and energy efficiency, this utility model uses this type of motor. The planetary gearbox is a high-precision, high-torque-density power transmission device that achieves speed reduction and torque increase through the multi-tooth meshing structure of the planetary gear set. Its core design consists of a sun gear, planet gears, an internal gear ring, and a planet carrier, and it is widely used in scenarios requiring a compact structure, high load-bearing capacity, and precise transmission.

[0010] The main improvement of this utility model is in the mechanical transmission and transmission parts inside the cylinder at both ends of the electric mechanical lifting cylinder, near the rod end 1 and the U-shaped clamp 6.

[0011] The U-shaped clamp 6 of this utility model is fixedly installed on the gear box 21, the gear box 21 is installed on the base 13, and the base 13 is fastened to the planetary reducer 5 and the bearing base 16. The output shaft 7 of the planetary reducer 5 passes through the end of the base 13 and is equipped with a drive gear 8. The drive gear 8 meshes with the center gear 9. The center gear 9 is installed through a stud roller bearing 10 and a thrust bearing 11. The top of the stud roller bearing 10 is installed on the base 13. The center gear 9 meshes with the driven gear 12. The driven gear 12 is installed at the bottom of the planetary roller screw 14. The drive gear 8, the center gear 9 and the driven gear 12 are all placed in the gear box 21.

[0012] See Figure 2 The gearbox 21 of this utility model is a sealed box. The meshing transmission between the drive gear 8, the center gear 9 and the driven gear 12 is completed within the gearbox 21. Through this meshing transmission, the power of the DC motor 4 with brake and the planetary reducer 5 is transmitted to the planetary roller screw 14 through the gear set. The driven gear 12 is radially mounted on the stud roller bearing 10 through the thrust bearing 11. The stud roller bearing 10 radially mounts the driven gear 12 within the gearbox 21, ensuring that it can only rotate within the gearbox 21 and will not move radially.

[0013] Base 13 is a connecting component that facilitates the assembly of planetary reducer 5, gearbox 21, and bearing base 16 together, see... Figure 2 One side is fastened to the gearbox 21 by threads, and the other end is slotted according to the shape of the planetary reducer 5 and the bottom of the bearing base 16 (similar to a wedge insertion, and with an interference fit).

[0014] The planetary roller screw 14 is mounted in the bearing base 16 via a double-row angular contact ball bearing 15, and the bearing base 16 is fixedly mounted on the cylinder 3.

[0015] See Figure 2 The double-row angular contact ball bearing 15 and the bearing base 16 form a stabilizing mechanism, which can ensure both the stability and rotation of the planetary roller screw 14. This section of the planetary roller screw 14 has no threads.

[0016] A flange-type single nut 17 with matching threads is fitted on the planetary roller screw 14. The flange-type single nut 17 is fixedly installed on the nut base 18, and the bottom end of the hollow piston rod 2 is fixed on the nut base 18.

[0017] See Figure 2The flange-type single nut 17 and the nut base 18 are an integrated adapter mechanism. When the planetary roller screw 14 rotates, it will move the adapter mechanism up and down (radially) along the planetary roller screw 14, thereby lifting or lowering the adapter mechanism. Since the bottom of the hollow piston rod 2 is fixedly installed on the nut base 18, the hollow piston rod 2 will also rise or fall synchronously when the adapter mechanism rises or falls.

[0018] The description in paragraphs

[0009] to

[0015] above is an improvement of the internal connection mechanism (or transmission mechanism, etc.) at one end of the U-shaped clamp 6 in this utility model.

[0019] The base of rod end 1 is threadedly installed on the top of hollow piston rod 2 and is laterally fastened by threaded pin 22. A deep groove ball bearing 20 is installed on the top of planetary roller screw 14, and the outer shell of the deep groove ball bearing 20 contacts the inner wall of hollow piston rod 2. A sealing guide sleeve 19 is installed between the inner wall of the top of cylinder 3 and the outer wall of hollow piston rod 2.

[0020] See Figure 3 This part describes the improvement of the connection mechanism (or transmission mechanism, etc.) at one end of the rod end 1 in this invention. The bottom of the rod end 1 is screwed onto the hollow piston rod 2 using a threaded matching method, and then secured by a threaded pin 22 from the side of the hollow piston rod 2. This threaded pin 22 prevents the threads from disengaging due to vibrations during vehicle movement and also helps increase the stability of the rod end 1 mounted on the hollow piston rod 2. The sealing guide sleeve 19 is similar to a support plug, placed between the outer wall of the hollow piston rod 2 and the inner wall of the cylinder 3, allowing the hollow piston rod 2 to slide against it. This invention incorporates a deep groove ball bearing 20 between the hollow piston rod 2 and the planetary roller screw 14, utilizing the radial and axial load characteristics of the deep groove ball bearing 20. This ensures that the hollow piston rod 2 can perform radial extension and retraction relative to the planetary roller screw 14, while also preventing the planetary roller screw 14 from rotating axially and causing the hollow piston rod 2 to follow suit.

[0021] Mechanical lifting cylinders are widely used in existing factory processing machinery. Due to the special reasons for lifting the cab of a car, existing car lifting cylinders are all hydraulic lifting cylinders and not mechanical lifting cylinders. However, due to the advantages of mechanical lifting cylinders over hydraulic lifting cylinders, this utility model improves the mechanical lifting cylinder to adapt it to the lifting work of the car cab.

[0022] Automatic function: When the front of the vehicle is in a normal lifting state, the torque output by the motor will be converted into linear motion through the reducer gear and planetary screw. When it is necessary to stop at a certain position, simply stop the torque output and activate the braking device to stop.

[0023] However, the damping function occurs during vehicle operation. Due to road bumps, the cab will be vertical relative to the ground, and the lifting cylinder, which is the mounting point of the cab, will also change damping with the bumps. The assembly length will be extended and shortened to achieve the damping comfort of the whole vehicle driving state. Under normal circumstances, the damping amplitude is ±50mm, and the damping force is about 200N-500N.

[0024] The inherent structure of the electric cylinder perfectly solves the design difficulties of damping force. When the planetary screw is subjected to gravity, the screw nut will move downwards, and the screw will change from linear motion to rotational motion. Because the output shaft of the DC motor can rotate freely, the entire motion system changes from linear motion to torsional force, thereby realizing the motion function.

[0025] To achieve the electric adjustment function, a control box can be added. This control box can detect the damping force and stroke during acceleration via electronic integrated circuits. The inventors of this invention will further research embedding AI electronic chips to achieve intelligent response in the acceleration function, thereby achieving the best comfortable driving experience. The lifting drive force is the motor torque, and the acceleration drive force is the weight of the front of the vehicle and the inertial force of the front's vertical movement.

Claims

1. A power lift cylinder with dead man function, comprising a rod end (1), a cylinder barrel (3), a direct current motor with brake (4), a planetary reducer (5), a U-shaped clamp (6), characterized in that: The U-shaped clamp (6) is fixedly installed on the gear box (21), the gear box (21) is installed on the base (13), the base (13) is buckled below the planetary reducer (5) and the bearing base (16); the output shaft (7) of the planetary reducer (5) is installed with the driving gear (8) through the end of the base (13), the driving gear (8) is engaged with the center gear (9), the center gear (9) is installed through the stud roller bearing (10) and the thrust bearing (11), the top end of the stud roller bearing (10) is installed on the base (13), the center gear (9) is engaged with the driven gear (12), the driven gear (12) is installed at the bottom end of the planetary roller screw (14), the driving gear (8), the center gear (9) and the driven gear (12) are all placed in the gear box (21); the planetary roller screw (14) is installed in the bearing base (16) through the double row angular contact ball bearing (15), the bearing base (16) is fixedly installed on the cylinder barrel (3); the flange single nut (17) matched in thread is sleeved on the planetary roller screw (14), the flange single nut (17) is fixedly installed on the nut base (18), the bottom end of the hollow piston rod (2) is fixed on the nut base (18), the base of the rod end (1) is installed on the top end of the hollow piston rod (2) through thread, and is fastened through the threaded pin (22) transversely, the top end of the planetary roller screw (14) is installed with the deep groove ball bearing (20), the outer tile of the deep groove ball bearing (20) is in contact with the inner wall of the hollow piston rod (2); the sealing guide sleeve (19) is installed between the inner wall of the top end of the cylinder barrel (3) and the outer wall of the hollow piston rod (2).

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