Holding and clamping rotating mechanism

Abstract

The invention relates to the technical field of holding forks, in particular to a holding clamping rotating mechanism which comprises an electric forklift, a telescopic hydraulic cylinder longitudinally fixed to a lifting frame at the front end of the electric forklift, a holding clamping mechanism arranged in front of the electric forklift and a hydraulic supporting auxiliary system. Through cooperative control of the first rotary hydraulic motor and the second rotary hydraulic motor, the holding and clamping mechanism has the functions of lifting, X-direction rotation and Y-direction rotation, and the flexibility of holding, clamping and stacking barrels is improved; the hydraulic supporting auxiliary system is arranged, when the barrel is clamped, the auxiliary pushing clamp on one side can make contact with the barrel firstly, then the auxiliary pushing clamp on the other side can make contact with the barrel under the cooperation of the hydraulic system, through auxiliary supporting of the auxiliary pushing clamps, stable supporting can be provided for the holding and clamping mechanism when the holding and clamping mechanism clamps the barrel, and it is ensured that the barrel is stable.

Description

Technical Field

[0001] The invention relates to the technical field of clamping forks, and in particular to a clamping rotating mechanism. Background Art

[0002] In the field of logistics handling and warehouse management, traditional forklift equipment usually uses forks to carry and stack goods, but this structure has certain limitations for goods of non-standard shapes or special materials, such as cylindrical objects, and traditional forks cannot stably clamp cylindrical goods. In order to solve this problem, the prior art proposes a forklift using a clamping mechanism, which can effectively carry and stack special-shaped goods through the clamping and rotation functions of the clamping mechanism. Although the existing clamping mechanism forklift can clamp and transfer goods of special shapes such as cylindrical objects, the following problems still exist in actual operation: for goods of non-standard shapes or sizes, it is difficult for the existing clamping mechanism to achieve accurate clamping. During the clamping process, if the goods are not located at the center of the clamping mechanism, it is easy to cause uneven force on the clamping mechanism, increase the risk of damage to the goods or the clamping mechanism, and even cause the risk of the goods shifting or overturning during transportation; the existing clamping mechanism lacks effective auxiliary support and stress monitoring devices, and also lacks an effective control mechanism, making it difficult to adjust the clamping position in real time during the clamping and rotation process. When the clamping mechanism is performing a flipping operation on the cylinder, the cylinder is prone to lose balance during the flipping process, affecting work efficiency and safety. Summary of the invention

[0003] In view of the above-mentioned defects and problems, the present invention provides a clamping and rotating mechanism. Through the hydraulic regulation and coordination of the hydraulic support auxiliary system, the auxiliary push clamps on both sides can first provide support on both sides of the goods when the clamping mechanism clamps the goods, so as to avoid tipping over when clamping the goods. The pressure sensor can monitor in real time the pressure exerted on the clamping group when clamping the goods, and cooperate with the moving mechanism to adjust the position of the goods in real time to ensure that the goods are located at the center of the clamping mechanism, thereby ensuring the stability of the goods during the clamping or rotation process.

[0004] The solution adopted by the present invention to solve the technical problem is: a clamping rotation mechanism, including an electric forklift, a telescopic hydraulic cylinder is longitudinally fixed on the lifting frame at the front end of the electric forklift, the output end of the telescopic hydraulic cylinder is connected to the lifting platform in the lifting frame, and also includes a clamping mechanism and a hydraulic support auxiliary system arranged in front of the electric forklift, a first rotary hydraulic motor is installed on the lifting platform, the output end of the first rotary hydraulic motor is connected to the center position of the clamping mechanism, and the clamping mechanism can be controlled to rotate along the X direction through the first rotary hydraulic motor; the clamping mechanism includes a clamping frame and The clamping group is symmetrically and horizontally slidably sleeved on the clamping frame through a clamping movable seat and a clamping arm, and the two clamping groups can move closer to or farther away from each other. The clamping group is installed on the clamping arm through a second rotary hydraulic motor, and the clamping group can be controlled to rotate along the Y direction through the second rotary hydraulic motor; the clamping group is composed of two mutually sleeved auxiliary clamps and a main clamp, the auxiliary clamp is fixed at the output end of the second rotary hydraulic motor, the main clamp is directionally slidably sleeved on the inner side of the auxiliary clamp, and a moving mechanism for controlling the directional movement of the main clamp inside the auxiliary clamp is provided in the auxiliary clamp; The hydraulic support auxiliary system includes a hydraulic oil tank and a hydraulic push rod. The hydraulic oil tank is arranged on the clamp frame. The hydraulic push rod is symmetrical up and down and vertically installed on the main clamp. The hydraulic oil in the hydraulic push rods on the left and right sides can flow to each other through the hydraulic oil tank as an intermediary. An auxiliary push clamp is fixed at the output end of the hydraulic push rod. The auxiliary push clamp is located on the inner side of the clamp group and is controlled to be extended and retracted by the hydraulic push rod. When the clamp is not in the center position of the cylinder, the auxiliary push clamp on one side will first contact the cylinder, and press the hydraulic oil in the hydraulic push rod on the same side into the hydraulic push rod on the other side, pushing the auxiliary push clamp on the other side to move forward and contact the other side of the cylinder. The auxiliary push clamps on both sides can provide auxiliary support to both sides of the cylinder.

[0005] Furthermore, the clamping frame is fixed to the output end of the first rotary hydraulic motor, and two clamping movable seats are symmetrically and horizontally slidably mounted on the clamping frame. A clamping arm is vertically welded on the clamping movable seat, and the clamping group is installed at the far end of the clamping arm. The fixed end of the second rotary hydraulic motor is installed at the far end of the clamping arm, and the output end is fixed at the center position of the clamping group.

[0006] Furthermore, the hydraulic push rods on the same side are connected via an oil distribution pipe, the two sides of the hydraulic oil tank are symmetrically connected with main oil pipes, and the front end of the main oil pipe is connected to the center position of the oil distribution pipe via a rotating joint.

[0007] Furthermore, a piston is matched in the hydraulic oil tank, the piston is connected to the hydraulic oil tank through a spring, an oil chamber is formed between the piston and the bottom wall of the hydraulic oil tank, and the main oil pipe is connected to the oil chamber.

[0008] Furthermore, the moving mechanism includes a motor installed in the auxiliary clamp, the output end of the motor is connected to a screw, a nut is threadedly mounted on the screw, the nut is connected to the outside of the main clamp through a connecting block, and a movable groove matching the connecting block is longitudinally opened on the inner side of the auxiliary clamp, guide grooves parallel to the movable grooves are symmetrically opened on the inner side of the auxiliary clamp, guide blocks are symmetrically fixed on the outer side of the main clamp, and the main clamp is directionally slidably mounted on the auxiliary clamp through the guide blocks.

[0009] Furthermore, two slide grooves are symmetrically opened on the front side of the clamp frame, and sliders matching the slide grooves are fixed on the upper and lower rear sides of the clamp movable seat. The clamp movable seat is directional slidably inserted into the slide groove by the slider, and the two clamp movable seats are connected by a telescopic hydraulic cylinder. The telescopic hydraulic cylinder can control the two clamp movable seats to move in opposite directions, thereby realizing the mutual distance and approach of the clamp groups.

[0010] Furthermore, pressure sensors are symmetrically installed on the inner side of the main clamp, and the pressure sensors can monitor the stress magnitude at both ends of the main clamp when the main clamp is clamping the cylinder.

[0011] Furthermore, the main oil pipe is arranged near the hydraulic oil tank to form a telescopic pipe section structure, and when the telescopic hydraulic cylinder controls the clamping group to move closer or further away, the telescopic pipe section can cooperate to complete the telescopic operation.

[0012] Furthermore, the inner side of the main clamp 342 is provided with clamping grooves of different diameters, and the clamping groove of small diameter is arranged in the clamping groove of large diameter, so as to realize the clamping of cylinders of different diameters.

[0013] Furthermore, a push clamp groove matching the auxiliary push clamp is provided on the inner side of the main clamp, and a yield groove is provided on the clamp arm.

[0014] The beneficial effects of the present invention are as follows: through the coordinated control of the first rotary hydraulic motor and the second rotary hydraulic motor, the precise flipping and rotation of the clamping mechanism along the X and Y directions is realized, so that the clamping mechanism has the functions of lifting, rotating in the X direction and rotating in the Y direction, and the flexibility of clamping and stacking cylinders is improved; by providing mutually fitted auxiliary clamps and main clamps and a coordinated moving mechanism, the main clamp can be moved on the auxiliary clamp for position adjustment through the moving mechanism, which is simpler, more convenient and easier to operate than directly controlling the movement of the forklift, and by providing a hydraulic support auxiliary system, when clamping the cylinder, the auxiliary push clamp on one side can first contact the cylinder, and then, with the cooperation of the hydraulic system, the auxiliary push clamp on the other side can also contact the cylinder, and through the cooperation of the piston and the spring in the hydraulic oil tank, the cylinder can be clamped. The temporary storage and release of hydraulic oil is realized, so that the auxiliary push clamps on both sides of the clamping mechanism can make adaptive coordination and adjustment during the clamping process, ensuring the smooth transportation of the cylinder. The auxiliary support of the auxiliary push clamp can provide stable support for the clamping mechanism when clamping the cylinder, ensuring the stability of the cylinder and preventing the cylinder from overturning during the clamping process; by installing a pressure sensor on the inner side of the main clamp, the stress on both ends of the cylinder during the clamping process can be monitored in real time, and fine-tuning can be performed through the mobile mechanism to ensure uniform stress distribution between the cylinder and the clamping group; by setting clamping grooves of different diameters, the main clamp has a clamping effect compatible with cylinders of various diameters, increasing the applicability and flexibility of the clamping mechanism; through the centralized control of the operating lever, the operation process is simplified, the difficulty of operation is reduced, and the safety and comfort of the operation are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a side view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the top view of the structure of the present invention; Figure 4 It is one of the partial three-dimensional structural schematic diagrams of the present invention; Figure 5 This is the second schematic diagram of the partial three-dimensional structure of the present invention; Figure 6 It is a structural schematic diagram of the hydraulic support auxiliary system of the present invention; Figure 7 It is a schematic diagram of the auxiliary clamp and the main clamp structure of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the movable clamp of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the fixed clamp of the present invention.

[0016] In the figure: 1. Electric forklift; 2. First rotary hydraulic motor; 3. Clamping mechanism; 31. Clamping frame; 32. Clamping movable seat; 33. Clamping arm; 34. Clamping group; 341. Auxiliary clamp; 342. Main clamp; 342a. Clamping slot 1; 342b. Clamping slot 2; 35. Second rotary hydraulic motor; 36. Slide; 37. Hydraulic cylinder mounting seat; 38. Giving way slot; 39. Sliding block; 4. Telescopic hydraulic cylinder; 5. Hydraulic support auxiliary system ; 51. Hydraulic oil tank; 511. Piston; 512. Spring; 52. Main oil pipe; 53. Rotary joint; 54. Oil distribution pipe; 55. Hydraulic push rod; 56. Auxiliary push clamp; 56a. Push clamp groove; 57. Hydraulic rod mounting seat; 6. Lifting hydraulic cylinder; 7. Hydraulic main control console; 8. Operating lever; 9. Moving mechanism; 91. Motor; 92. Screw; 93. Nut; 94. Movable groove; 95. Guide groove; 96. Guide block; 10. Pressure sensor. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] See also Figure 1-9 , the present invention provides a technical solution for a clamping and rotating mechanism: Example

[0019] according to Figure 1 , Figure 2 and Figure 3 As shown, the front end of the lifting frame of the electric forklift 1 is provided with a clamping mechanism 3, and a first rotary hydraulic motor 2 is installed at the front end of the electric forklift 1 at the rear center of the clamping mechanism 3. The fixed end of the first rotary hydraulic motor 2 is directly fixed to the lifting platform of the electric forklift 1, and the output end is connected to the center of the clamping frame 31. The clamping mechanism 3 can be controlled to flip and rotate along the X direction through the first rotary hydraulic motor 2. The specific structure of the clamping mechanism 3 is shown in FIG. Figure 4 and Figure 5As shown, it includes a clamping frame 31, a clamping movable seat 32 and a clamping arm 33. The clamping frame 31 is arranged at the front end of the electric forklift 1 and is installed on the lifting platform of the electric forklift 1 through the first rotary hydraulic motor 2. A telescopic hydraulic cylinder 4 is longitudinally fixed on the lifting frame of the electric forklift 1. The output end of the telescopic hydraulic cylinder 4 is connected to the lifting platform. The telescopic hydraulic cylinder 4 can control the clamping mechanism 3 to move up and down as a whole to realize the clamping movement of the cylinder. The front side of the clamping frame 31 is symmetrically and horizontally slidably sleeved with two clamping movable seats 32. Two slide grooves 36 are symmetrically opened in front of the clamping frame. Slide blocks 39 matching the slide grooves 36 are fixed on the upper and lower sides of the rear side of the clamping movable seat 32. The movable seat 32 is slidably mounted in the slide groove 36 through the slider 39, and the two clamping movable seats 32 can approach or move away from each other. The clamping arm 33 is vertically welded and fixed on the clamping movable seat 32. A left-right symmetrical clamping group 34 is installed at the far end of the two clamping arms 33. The left and right clamping groups 34 are used to clamp the cylinder body, and the clamping group 34 is installed on the clamping arm 33 through a second rotary hydraulic motor 35. The fixed end of the second rotary hydraulic motor 35 is installed at the far end of the clamping arm 33, and the output end is fixed at the center position of the clamping group 34. The second rotary hydraulic motor 35 can realize the Y-axis rotation of the clamping group 34, and then realize the Y-axis flipping rotation of the cylinder body after clamping the cylinder body.

[0020] The two clamping movable seats 32 are connected by a telescopic hydraulic cylinder 4. Two hydraulic cylinder mounting seats 37 are symmetrically arranged in the upper and lower middle position of the front side of the clamping frame 31. The telescopic hydraulic cylinder 4 is horizontally installed between the two clamping movable seats 32 through the hydraulic cylinder mounting seat 37. The output ends of the upper and lower telescopic hydraulic cylinders 4 are symmetrically arranged and respectively connected to the two clamping movable seats 32. The telescopic hydraulic cylinder 4 can control the two clamping movable seats 32 to move in opposite directions, so as to realize the mutual distance and approach of the clamping groups 34, thereby realizing the clamping or release of the cylinder.

[0021] The clamping group 34 is composed of two auxiliary clamps 341 and a main clamp 342 which are mutually fitted. The auxiliary clamp 341 and the main clamp 342 are both arc-shaped structures, and a clamping groove is formed on the inner side of the main clamp 342. The main clamp 342 can clamp the cylinder through the clamping groove. The auxiliary clamp 341 is directly connected to the output end of the second rotary hydraulic motor 35. The main clamp 342 is directionally slidably fitted on the inner side of the auxiliary clamp 341, and a moving mechanism 9 is provided in the auxiliary clamp 341 to control the directional movement of the main clamp 342 inside the auxiliary clamp 341.

[0022] A group of pressure sensors 10 are symmetrically installed on the upper and lower sides of the inner side of the main clamp 342. When the clamp group 34 is clamping the cylinder, the pressure sensor 10 can monitor the pressure between the main clamp 342 and the cylinder, and in the process of the clamp mechanism 3 controlling the cylinder to flip, the pressure value detected by the pressure sensor 10 will also change accordingly. If the cylinder is in the center position of the clamp group 34, it can ensure that the cylinder flips around the center, and the pressure change on the clamp group 34 during the cylinder flipping process is also within a normal range. If the cylinder is not in the center position of the clamp group 34, the center point is offset upward or downward. The cylinder cannot flip around the center point during the flipping process, and the stress on both ends of the clamping group 34 during the flipping process will also exceed the range. The upper and lower pressure sensors 10 will detect that the pressure change exceeds the range. At this time, the forklift driver can judge to which side the position of the cylinder is offset by the pressure value detected by the pressure sensor 10, and then fine-tune the position of the cylinder through the moving mechanism 9 to make the center of the cylinder coincide with the center of the auxiliary clamp 341, ensuring uniform stress distribution between the cylinder and the clamping group 34, avoiding deformation or wear caused by excessive force on the cylinder or the clamping group 34 due to uneven stress.

[0023] The specific structure of the moving mechanism 9 is as follows: Figure 8 and Fig. 9 As shown, a motor 91 is installed in the auxiliary clamp 341, and the output end of the motor 91 is connected to a screw rod 92 located in the auxiliary clamp 341, and a nut 93 is threadedly sleeved on the screw rod 92, and the nut 93 is connected to the outer side of the main clamp 342 through a connecting block, and a movable groove 94 matching the connecting block is longitudinally opened on the inner side of the auxiliary clamp 341, and guide grooves 95 parallel to the movable groove 94 are symmetrically opened on the inner side of the auxiliary clamp 341, and guide blocks 96 are symmetrically fixedly arranged on the outer side of the main clamp 342, and the main clamp 342 is directional and slidably sleeved on the auxiliary clamp 341 through the guide blocks 96; when the pressure sensor 10 detects the first rotating hydraulic When the motor 2 or the second rotary hydraulic motor 35 controls the clamping group 34 and the cylinder to flip in the X direction or the Y direction, and the pressure value on one side of the main clamp 342 exceeds the range, the motor 91 starts to drive the screw 92 to rotate, and the main clamp 342 is controlled to move up and down on the auxiliary clamp 341 under the thread cooperation of the screw 92 and the nut 93, and the position of the main clamp 342 is fine-tuned, so that the main clamp 342 clamps the cylinder and moves slightly in the direction of smaller pressure value, ensuring that the center of the cylinder coincides with the center of the auxiliary clamp 341, so that the stress distribution between the cylinder, the clamping group 34 and the clamping arm 33 is uniform, and the stability in the process of clamping and flipping the cylinder is improved.

[0024] The electric forklift 1 is provided with a hydraulic main control console 7, and all hydraulic control systems in the fork-holding device are controlled by the hydraulic main control console 7. An operating lever 8 is provided in the cab of the electric forklift 1, including a lifting operating lever, an angle tilting operating lever, an X-axis rotation operating lever, a Y-axis rotation operating lever and a clamping and releasing operating lever, and the operation of the fork-holding device can be controlled by the operating lever.

[0025] In specific use, the present invention provides a clamping rotation mechanism, and the electric forklift 1 keeps the clamping mechanism 3 in the following position before operation. Figure 4 In the state shown, when clamping the cylinder, the driver first controls the electric forklift 1 to move to the front of the cargo, moves the clamping mechanism 3 to both sides of the cargo, and adjusts the overall height of the clamping mechanism 3 through the telescopic hydraulic cylinder 4, so as to ensure that the main clamp 342 is in a symmetrical position up, down, left and right of the cargo as much as possible, and then starts the telescopic hydraulic cylinder 4, and drives the clamping arms 33 and the clamping group 34 on both sides to approach the middle through the telescopic hydraulic cylinder 4, so that the main clamp 342 contacts the cylinder to complete the clamping, and then the telescopic hydraulic cylinder 4 contracts to drive the clamping mechanism 3 and the cylinder to move upward, so that the cylinder is off the ground to a certain height, and the electric forklift 1 drives the cylinder to move. When the cylinder needs to be flipped in the X direction or Y direction during the process of transporting or stacking goods, the driver controls the first rotary hydraulic motor 2 to start through the operating lever 8, controls the clamping mechanism 3 as a whole through the first rotary hydraulic motor 2 and drives the clamped cylinder to flip in the X direction, or controls the second rotary hydraulic motor 35 to start through the operating lever 8, and controls the clamping group 34 and the cylinder to flip in the Y direction through the second rotary hydraulic motor 35; During the process of X-axis or Y-axis flipping of the cylinder, if the cylinder is not at the center position of the clamping group 34, the pressure sensor 10 will detect that the stress generated at one end of the main clamp 342 during the flipping process exceeds the range. At this time, the driver controls the motor 91 to rotate forward or flip according to the pressure values ​​at both ends of the main clamp 342 detected by the pressure sensor 10, and drives the screw 92 to rotate through the motor 91. Under the threaded transmission cooperation of the screw 92 and the nut 93, and the guiding action of the guide groove 95 and the guide block 96, the main clamp 342 is controlled to move slightly in the opposite direction of the offset direction, and the positions of the main clamp 342 and the cylinder are adjusted until the cylinder moves to the center position of the clamping mechanism 3, ensuring that the clamping group 34 can drive the cylinder to rotate smoothly, and ensuring that the stress between the cylinder and the clamping group 34 after rotation is uniform, thereby improving the stability of the clamping cylinder and reducing the fatigue strength of the clamping group 34. Example

[0026] On the basis of the first embodiment, when the holding fork is clamping the cylinder, in order to stably and accurately clamp the cylinder, it is necessary to ensure that the cylinder is located in the center position of the clamping mechanism 3. However, since the holding fork is generally manually controlled, it is impossible to manually accurately move the clamping group 34 to both sides of the cylinder symmetrically, and there will be a slight deviation. At this time, when clamping the cylinder, the clamping group 34 on one side will first contact the cylinder. As the telescopic hydraulic cylinder 4 continues to control the operation of the clamping mechanism 3, the clamping group 34 will continue to move synchronously to the middle. The clamping group 34 that first contacts the cylinder will push the cylinder, and one side of the cylinder is subjected to force, while the clamping group 34 on the other side has not yet contacted the cylinder. The other side of the cylinder has no support. At this time, the clamping group 34 that first contacts the cylinder can easily push the cylinder down. In order to solve this problem, Figure 4 , Figure 5 and Figure 6 As shown, a hydraulic support auxiliary system 5 is arranged on the clamping mechanism 3, and the hydraulic support auxiliary system 5 includes a hydraulic oil tank 51 and a hydraulic push rod 55. The hydraulic oil tank 51 is arranged on the central front side of the clamping frame 31. There are two groups of hydraulic push rods 55, which are vertically installed on the main clamp 342. Hydraulic rod mounting seats 57 are fixed symmetrically on the outer side of the main clamp 342. The fixed end of the hydraulic push rod 55 is supported by the hydraulic rod mounting seat 57 and is fixed on the main clamp 342. The output end can be extended and retracted on the inner side of the main clamp 342. An auxiliary push clamp 56 is fixed at the output end of the hydraulic push rod 55. The auxiliary push clamp 56 is located on the inner side of the clamping group 34, and the curvature of the auxiliary push clamp 56 is consistent with the curvature of the main clamp 342. A push clamp groove 56a matching the auxiliary push clamp 56 is opened at the corresponding position on the inner side of the main clamp 342.

[0027] The hydraulic push rods 55 on the same side of the upper and lower parts are connected by an oil distribution pipe 54. The main oil pipes 52 are symmetrically connected to the two sides of the hydraulic oil tank 51. The main oil pipes 52 extend from the rear of the clamping movable seat 32 to the two sides of the clamping mechanism 3 to form an L-shaped pipeline, and the front end of the main oil pipe 52 is connected to the center of the oil distribution pipe 54 through a rotating joint 53. When the clamping group 34 is controlled by the second rotary hydraulic motor 35 to flip in the Y direction, the rotating joint 53 can ensure that the main oil pipe 52 and the oil distribution pipe 54 cooperate to complete the rotation; when the clamping mechanism 3 is clamping the cylinder, if there is a slight deviation in the position of the forklift and the cylinder is not completely in the center position of the clamping mechanism 3, when the telescopic hydraulic cylinder 4 controls the clamping groups 34 on both sides to move synchronously to the middle, the auxiliary push clamp 56 on one side will first contact the cylinder. As the clamping groups 34 on both sides are controlled by the telescopic hydraulic cylinder 4 to continue to move synchronously toward the middle, the auxiliary push clamp 56 that first contacts the cylinder will press against the cylinder, and a relative squeezing force is generated between the auxiliary push clamp 56 and the cylinder, and the excess hydraulic oil in the hydraulic push rod 55 on the same side is pressed into the hydraulic push rod 55 on the other side (not yet in contact with the cylinder side) through the oil distribution pipe 54 and the main oil pipe 52 and the hydraulic oil tank 51 as an intermediary, so that the hydraulic push rod 55 on the other side is extended to drive the auxiliary push clamp 56 on the same side to extend forward and contact the cylinder. As the clamping group continues to move toward the middle, the auxiliary push clamps on both sides can be adaptively adjusted, so that the auxiliary push clamps 56 on both sides can contact the cylinder and provide auxiliary support for both sides of the cylinder, which can prevent the cylinder from being pushed down when the clamping mechanism 3 continues to move toward the middle.

[0028] A piston 511 is matched and mounted in the hydraulic oil tank 51. An oil chamber is formed between the piston 511 and the bottom wall of the hydraulic oil tank 51. The main oil pipe 52 is connected to the oil chamber. The piston 511 is connected to the hydraulic oil tank 51 through a spring 512. The two ends of the spring 512 are respectively fixed on the front wall of the hydraulic oil tank 51 and the opposite end faces of the piston 511. When the auxiliary push clamps 56 on both sides contact the cylinder and provide auxiliary support, the clamping group 34 continues to be controlled by the telescopic hydraulic cylinder 4 to move toward the middle to clamp the cylinder. When the clamping group 34 moves toward the middle, the auxiliary push clamps 56 on both sides generate a force between the cylinder and the cylinder. Under the action of the force, the hydraulic oil in the hydraulic push rods 55 on both sides overcomes the elastic force of the spring 512 and enters the oil chamber of the hydraulic oil tank 51 for temporary storage. When the main clamp 342 completely contacts the cylinder, the auxiliary push clamp 56 also moves to the push clamp groove 56a without affecting the clamping of the main clamp 342. Then, the clamping work of the cylinder can be completed by the main clamp 342.

[0029] The clamping group 34 can only be controlled by the second rotary hydraulic motor 35 to flip 90° counterclockwise. A clearance groove 38 is provided on the clamping arm 33. When the clamping group 34 flips in the Y direction, the clearance groove 38 provides an escape space for the oil distribution pipe 54, so that the clamping group 34 can flip with the oil distribution pipe 54 from the vertical direction to the horizontal direction.

[0030] The main oil pipe 52 is arranged near the hydraulic oil tank 51 as a telescopic pipe structure, and cooperates with the telescopic hydraulic cylinder 4 to achieve the approach or distance of the clamping group 34 . Example

[0031] On the basis of the first embodiment, Figure 8 As described, two clamping grooves with different diameters are arranged on the inner side of the main clamp 342, namely clamping groove 1 342a and clamping groove 2 342b. The diameter of clamping groove 1 342a is larger than the diameter of clamping groove 2 342b. Clamping groove 2 342b is arranged in the middle of clamping groove 1 342a. The clamping groove 2 342b can clamp a cylinder with a smaller diameter, and the clamping groove 1 342a can clamp a cylinder with a larger diameter, so that the main clamp 342 has a clamping effect compatible with cylinders of two different diameters.

[0032] Correspondingly, pressure sensors 10 are symmetrically installed in the clamping grooves of the main clamps 342 with different diameters.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A clamping and rotating mechanism, comprising an electric forklift (1), a telescopic hydraulic cylinder (4) being longitudinally fixed on a lifting frame at the front end of the electric forklift (1), an output end of the telescopic hydraulic cylinder (4) being connected to a lifting platform in the lifting frame, characterized in that: The invention also comprises a clamping mechanism (3) and a hydraulic support auxiliary system (5) arranged in front of the electric forklift (1); a first rotary hydraulic motor (2) is installed on the lifting platform; the output end of the first rotary hydraulic motor (2) is connected to the center position of the clamping mechanism (3); the clamping mechanism (3) can be controlled to rotate along the X direction through the first rotary hydraulic motor (2); the clamping mechanism (3) comprises a clamping frame (31) and a clamping group (34); the clamping group (34) is symmetrically horizontally slidably sleeved on the clamping frame (31) through a clamping movable seat (32) and a clamping arm (33); and the two clamping groups (34) can be close to or close to each other. The clamping group (34) is installed on the clamping arm (33) through a second rotary hydraulic motor (35), and the clamping group (34) can be controlled to rotate along the Y direction through the second rotary hydraulic motor (35); the clamping group (34) is composed of two auxiliary clamps (341) and a main clamp (342) which are mutually sleeved, the auxiliary clamp (341) is fixed to the output end of the second rotary hydraulic motor (35), the main clamp (342) is directionally slidably sleeved on the inner side of the auxiliary clamp (341), and a moving mechanism (9) for controlling the directional movement of the main clamp (342) inside the auxiliary clamp (341) is arranged inside the auxiliary clamp (341); The hydraulic support auxiliary system (5) comprises a hydraulic oil tank (51) and a hydraulic push rod (55). The hydraulic oil tank (51) is arranged on the clamp frame (31). The hydraulic push rod (55) is symmetrically arranged vertically on the main clamp (342). The hydraulic oil in the hydraulic push rods (55) on the left and right sides can flow to each other through the hydraulic oil tank (51) as an intermediary. An auxiliary push clamp (56) is fixed at the output end of the hydraulic push rod (55). The auxiliary push clamp (56) is located on the inner side of the clamp group (34) and is controlled to be extended and retracted by the hydraulic push rod (55). When the clamp is not in the center position of the cylinder, the auxiliary push clamp (56) on one side will first contact the cylinder and press the hydraulic oil in the hydraulic push rod (55) on the same side into the hydraulic push rod (55) on the other side, pushing the auxiliary push clamp (56) on the other side to move forward and contact the other side of the cylinder. The auxiliary push clamps (56) on both sides can provide auxiliary support to both sides of the cylinder.

2. A clamping and rotating mechanism according to claim 1, characterized in that: The clamping frame (31) is fixed to the output end of the first rotary hydraulic motor (2); two clamping movable seats (32) are symmetrically and horizontally slidably mounted on the clamping frame (31); a clamping arm (33) is vertically welded to the clamping movable seat (32); a clamping group (34) is mounted at the far end of the clamping arm (33); a fixed end of the second rotary hydraulic motor (35) is mounted at the far end of the clamping arm (33); and an output end is fixed at the center of the clamping group (34).

3. The clamping and rotating mechanism according to claim 1, characterized in that: The hydraulic push rods (55) on the same side are connected via an oil distribution pipe (54), and main oil pipes (52) are symmetrically connected to both sides of the hydraulic oil tank (51), and the front end of the main oil pipe (52) is connected to the center position of the oil distribution pipe (54) via a rotating joint (53).

4. The clamping and rotating mechanism according to claim 3, characterized in that: A piston (511) is matched and mounted in the hydraulic oil tank (51); the piston (511) is connected to the hydraulic oil tank (51) via a spring (512); an oil chamber is formed between the piston (511) and the bottom wall of the hydraulic oil tank (51); and the main oil pipe (52) is connected to the oil chamber.

5. The clamping and rotating mechanism according to claim 1, characterized in that: The moving mechanism (9) comprises a motor (91) installed in the auxiliary clamp (341); the output end of the motor (91) is connected to a screw rod (92); a nut (93) is threadedly sleeved on the screw rod (92); the nut (93) is connected to the outside of the main clamp (342) through a connecting block; a movable groove (94) matching the connecting block is longitudinally provided on the inside of the auxiliary clamp (341); guide grooves (95) parallel to the movable grooves (94) are symmetrically provided on the inside of the auxiliary clamp (341); guide blocks (96) are symmetrically fixedly provided on the outside of the main clamp (342); the main clamp (342) is directionally slidably sleeved on the auxiliary clamp (341) through the guide blocks (96).

6. The clamping and rotating mechanism according to claim 1, characterized in that: Two slide grooves (36) are symmetrically provided on the front side of the clamping frame (31), and sliders (39) matching the slide grooves (36) are fixed to the upper and lower sides of the rear side of the clamping movable seat (32). The clamping movable seat (32) is directionally slidably sleeved in the slide groove (36) via the slider (39), and the two clamping movable seats (32) are connected via a telescopic hydraulic cylinder (4). The telescopic hydraulic cylinder (4) can control the two clamping movable seats (32) to move in opposite directions, thereby realizing the mutual separation and approach of the clamping group (34).

7. The clamping and rotating mechanism according to claim 1, characterized in that: Pressure sensors are symmetrically mounted on the inner side of the main clamp (342) in the upper and lower parts, and the pressure sensors can monitor the stress magnitude applied to both ends of the main clamp (342) when clamping the cylinder.

8. The clamping and rotating mechanism according to claim 3, characterized in that: The main oil pipe (52) is arranged at a position close to the hydraulic oil tank (51) to form a telescopic pipe section structure, and when the telescopic hydraulic cylinder (4) controls the clamping group (34) to move closer or further away, the telescopic pipe section can cooperate to complete telescoping.

9. The clamping and rotating mechanism according to claim 1, characterized in that: The main clamp (342) is provided with clamping grooves of different diameters on the inner side, and the clamping groove of small diameter is arranged in the clamping groove of large diameter, so as to realize the clamping of cylinders of different diameters.

10. The clamping and rotating mechanism according to claim 1, characterized in that: A push clamp groove (56a) matching the auxiliary push clamp (56) is provided on the inner side of the main clamp (342), and a clearance groove (38) is provided on the clamp arm (33).

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