Car lifting jack and car lifting system

Abstract

The embodiment of the utility model provides a car lifting jack and a car lifting system. A lead screw of the car lifting jack extends in the height direction of the car lifting jack. The driving assembly is in driving connection with the lead screw. The bracket mechanism comprises a nut seat and a bracket main body, one of the nut seat and the bracket main body is provided with a mounting opening, the other one is provided with an extending part extending into the mounting opening, and the extending part movably abuts against the inner top wall of the mounting opening so that the nut seat can be connected with the bracket main body; in at least one of the first direction and the second direction, the opening size of the mounting opening is larger than the size of the area, located in the mounting opening, of the extending part; wherein the first direction and the second direction are respectively perpendicular to the height direction. In the height direction, the bracket body is slidably arranged on the machine body, the nut base is slidably arranged on the lead screw and is in threaded connection with the lead screw, and the driving assembly drives the lead screw to rotate so that the nut base can drive the bracket body to ascend and descend in the height direction. According to the car lifting jack, the risk of structural damage can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automation and intelligence, in particular to a car jacking machine and a car jacking system. BACKGROUND

[0002] The car jacking machine is a device for lifting the car frame from the bottom of the car body. During the lifting process, the car frame will not be damaged, so that the parts at the bottom of the car frame can be repaired. After the repair is completed, the car jacking machine lowers the car frame.

[0003] In the related art, the car jacking machine has the problem of structural damage caused by radial force during force transmission, which leads to poor stability of the car jacking machine and safety problems. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the main purpose of the embodiments of the present application is to provide a car jacking machine capable of reducing the risk of structural damage.

[0005] To achieve the above-mentioned purpose, the technical scheme of the embodiments of the present application is as follows:

[0006] The first aspect of the embodiments of the present application provides a car jacking machine, comprising:

[0007] a machine body;

[0008] a lead screw extending along a height direction of the car jacking machine;

[0009] a driving assembly drivingly connected with the lead screw;

[0010] a bracket mechanism comprising a nut seat and a bracket body, one of the nut seat and the bracket body has a mounting port, and the other has an insertion portion inserted into the mounting port, the insertion portion movably abuts against the inner top wall of the mounting port to connect the nut seat and the bracket body; the opening size of the mounting port is greater than the size of the area where the insertion portion is located in the mounting port in at least one of a first direction and a second direction; wherein the first direction and the second direction are perpendicular to the height direction;

[0011] along the height direction, the bracket body is slidably arranged on the machine body, the nut seat is slidably arranged on the lead screw and threadedly connected with the lead screw, and the driving assembly drives the lead screw to rotate to drive the nut seat to lift the bracket body along the height direction.

[0012] In an embodiment, the bracket body has two mounting ports, the two mounting ports are arranged at intervals along the first direction, the nut seat has two insertion portions, and the insertion portions are arranged one by one corresponding to the mounting ports.

[0013] In one embodiment, the bracket body comprises a tray and two first side plates, the tray extends along the second direction, the two first side plates are respectively arranged on opposite sides of the tray along the first direction, the first side plates have the mounting opening, the nut seat is located at a space between the two first side plates and on a top side of the tray.

[0014] In one embodiment, the nut seat comprises a seat body, the seat body comprises a top plate, a bottom plate, at least one second side plate and at least one inclined plate, the top plate and the bottom plate are spaced apart along the height direction, at least one side of the top plate and the bottom plate along the first direction is provided with the second side plate and the inclined plate, the second side plate is respectively connected with the top plate and the inclined plate, and the second side plate extends along the height direction, the other end of the inclined plate is connected with the bottom plate, and the inclined plate is inclined relative to the second side plate and the bottom plate; the second side plate, at least part of the area of the top plate and at least part of the area of the inclined plate jointly form the extension part.

[0015] In one embodiment, the driving assembly is located at the top end of the lead screw to be drivingly connected with the top end of the lead screw.

[0016] In one embodiment, the bogie loader further comprises a coupling, which is arranged between the driving assembly and the lead screw to be connected with the driving assembly and the lead screw respectively; and / or,

[0017] The bogie loader further comprises a tapered bearing, which connects the lead screw and the machine body.

[0018] In one embodiment, the nut seat comprises a seat body, a main nut and a protection nut, the seat body is connected with the bracket body, the main nut and the protection nut are respectively threadedly connected with the lead screw, and one of the main nut and the protection nut is located on a top side of the other one, the main nut is connected with the seat body;

[0019] The nut seat has a first working state and a second working state, when the nut seat is in the first working state, the driving assembly drives the lead screw to rotate, so that the main nut drives the seat body and the bracket body to ascend or descend along the height direction;

[0020] When the nut seat is in the second working state, the driving assembly drives the lead screw to rotate, so that the protection nut drives the seat body and the bracket body to ascend or descend along the height direction.

[0021] In one embodiment, the nut seat further comprises a limiting bolt, the protective nut has a connecting hole, the limiting bolt passes through the connecting hole to connect with the seat body, and the extending length of the limiting bolt along the height direction is greater than the depth of the connecting hole along the height direction.

[0022] When the nut seat is in the first working state, the protective nut can slide along the height direction relative to the limiting bolt; and when the nut seat is in the second working state, the protective nut abuts against the limiting bolt.

[0023] In one embodiment, the driving assembly is a servo motor, and the servo motor drives the screw rod to rotate to a set torque, so that the bracket mechanism enters a frame jacking state.

[0024] The second aspect of the embodiment of the present application provides a frame jacking system, which comprises a forklift and the frame jacking machine.

[0025] The embodiment of the present application provides a frame jacking machine and a frame jacking system. The bracket mechanism of the frame jacking machine comprises a nut seat and a bracket body. One of the nut seat and the bracket body has a mounting port, and the other has an extending portion extending into the mounting port. The extending portion movably abuts against the inner top wall of the mounting port, so that the nut seat and the bracket body are connected. In at least one of a first direction and a second direction, the opening size of the mounting port is greater than the size of the region of the extending portion in the mounting port. The first direction and the second direction are perpendicular to the height direction, respectively. In the height direction, the bracket body is movably arranged on the machine body, and the nut seat is movably arranged on the screw rod and threadedly connected with the screw rod. Thus, in the process of driving the screw rod to rotate by the driving assembly, so that the nut seat drives the bracket body to ascend and descend along the height direction, because the opening size of the mounting port is larger, the extending portion and the mounting port are not completely fixed, and the extending portion and the inner top wall of the mounting port can relatively move in at least one of the first direction and the second direction, so that the position of the nut seat can be adjusted in the first direction and / or the second direction, to reduce the radial force transmission of the nut seat in the rotating process of the screw rod. That is, the stress along the radial direction of the screw rod and the nut seat can be reduced, the nut seat and the bracket body can better ascend and descend along the height direction, and thus the risk of damage of the screw rod and the nut seat can be reduced, the stability of the frame jacking machine is better, and the safety performance of the frame jacking machine can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a structural schematic diagram of a frame jacking machine according to an embodiment of the present application;

[0027] Figure 2 FIG. 2 is a structural schematic diagram of a frame jacking machine according to another embodiment of the present application;Figure 1 Front view of the car rack machine;

[0028] Figure 3 For Figure 2 Side view of the car rack machine;

[0029] Figure 4 For Figure 2 Top view of the car rack machine;

[0030] Figure 5 For Figure 1 Sectional view of part of the structure of the car rack machine;

[0031] Figure 6 For Figure 1 Structural schematic diagram of the bracket mechanism of the car rack machine;

[0032] Figure 7 For Figure 6 Local enlarged view at point A of the car rack machine;

[0033] Figure 8 For Figure 6 Structural schematic diagram of another perspective of the car rack machine;

[0034] Figure 9 For Figure 8 Top view of the car rack machine;

[0035] Figure 10 For Figure 1 Sectional view of another part of the structure of the car rack machine;

[0036] Figure 11 For Figure 10 Local enlarged view at point B of the car rack machine.

[0037] Explanation of reference signs

[0038] 10, car rack machine; 11, machine body; 12, screw rod; 13, driving assembly; 14, bracket mechanism; 141, nut seat; 1411, extension part; 1412, seat body; 1413, top plate; 1414, bottom plate; 1415, second side plate; 1416, inclined plate; 1417, main nut; 1418, protective nut; 1419, limiting bolt; 142, bracket body; 142a, mounting port; 1421, tray; 1422, first side plate; 15, shaft coupling; 16, tapered bearing; 20, forklift. DETAILED DESCRIPTION

[0039] In the present application, the "first direction", "second direction" and "height direction" orientation or positional relationship are based on the attached drawings. Figure 1The orientation or positional relationship is shown. It needs to be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0040] An embodiment of the present application provides a vehicle lifting machine 10, please refer to Figures 1 to 4 The vehicle lifting machine 10 comprises a machine body 11, a lead screw 12, a driving assembly 13 and a bracket mechanism 14.

[0041] The driving assembly 13 is drivingly connected with the lead screw 12.

[0042] The lead screw 12 extends along a height direction of the vehicle lifting machine 10.

[0043] Please refer to Figure 6 and Figure 8 The bracket mechanism 14 comprises a nut seat 141 and a bracket body 142, one of the nut seat 141 and the bracket body 142 has a mounting port 142a, and the other has a protruding portion 1411 which protrudes into the mounting port 142a, the protruding portion 1411 movably abuts against an inner top wall of the mounting port 142a, so as to connect the nut seat 141 and the bracket body 142; along at least one of a first direction and a second direction, an opening size of the mounting port 142a is greater than a size of an area where the protruding portion 1411 is located in the mounting port 142a; wherein the first direction and the second direction are perpendicular to the height direction respectively.

[0044] Along the height direction, the bracket body 142 is slidably arranged on the machine body 11, the nut seat 141 is slidably arranged on the lead screw 12 and threadedly connected with the lead screw 12, the driving assembly 13 drives the lead screw 12 to rotate, so as to drive the bracket body 142 to ascend and descend along the height direction.

[0045] Another embodiment of the present application provides a vehicle lifting system, please refer to Figures 1 to 4 The vehicle lifting system comprises a forklift 20 and the vehicle lifting machine 10 described in any embodiment of the present application, a bottom end of the vehicle lifting machine 10 is formed with a connecting space, and the forklift 20 abuts against the vehicle lifting machine 10 by protruding into the connecting space.

[0046] Specifically, the vehicle jacking machine 10 in the prior art comprises a vertically arranged machine body 11, and a walking mechanism arranged at the bottom of the machine body 11, and the ground clearance of the machine body 11 is adjusted through the walking mechanism. That is to say, the vehicle jacking machine 10 in the prior art needs to additionally arrange the walking mechanism to match the machine body 11, and the machine body 11 cannot realize cooperation with a universal product such as a forklift 20 (such as a hand forklift or an electric forklift). However, the vehicle jacking machine 10 in the embodiment of the present application can cooperate with the forklift 20, and the movement of the vehicle jacking machine 10 is realized through the forklift 20. The forklift 20 can be a universal product produced in batches on the market, and the vehicle jacking machine 10 does not need to additionally arrange the walking mechanism, so that the structure of the vehicle jacking machine 10 can be simplified, the universality of the vehicle jacking machine 10 can be improved, the production time can be reduced, and the production cost can be saved.

[0047] The machine body 11 is the main structure of the vehicle jacking machine 10, and is used for supporting and mounting other structures.

[0048] The driving assembly 13 can drive the screw rod 12 to rotate, and the specific arrangement position can be set according to actual conditions.

[0049] For example, the driving assembly 13 is located at the bottom end of the screw rod 12.

[0050] For another example, referring to Figures 1 to 4 , the driving assembly 13 is located at the top end of the screw rod 12 to be drivingly connected with the top end of the screw rod 12. In this way, by arranging the driving assembly 13 on the top side of the screw rod 12, the driving assembly 13 can not be affected by the lengthening of the screw rod 12 due to stress, and the risk of damage of the driving assembly 13 can be reduced.

[0051] The driving assembly 13 and the screw rod 12 can be directly contacted to drive the screw rod 12 to rotate. Alternatively, the driving assembly 13 and the screw rod 12 can be indirectly driven through a transmission structure to drive the screw rod 12 to rotate.

[0052] For example, referring to Figure 5 , the vehicle jacking machine 10 further comprises a coupling 15 arranged between the driving assembly 13 and the screw rod 12 to be connected with the driving assembly 13 and the screw rod 12, respectively. In this way, the driving assembly 13 can transmit torque to the screw rod 12 through the coupling 15, so that the screw rod 12 can rotate. By arranging the coupling 15, the driving assembly 13 and the screw rod 12 can be conveniently drivingly connected, and a better force transmission effect can be achieved.

[0053] The driving assembly 13 is a driving device capable of driving the screw rod 12 to rotate, and the specific structure can be set according to actual conditions.

[0054] For example, the driving assembly 13 is a servo motor, which rotates the driving screw 12 to a set torque to make the bracket mechanism 14 enter the state of supporting the frame. Thus, by using a servo motor as the driving assembly 13, the force on the tray 1421 can be determined according to the output torque of the servo motor. That is, when the torque of the servo motor driving the screw 12 to rotate reaches the set torque, it can be determined that the bracket mechanism 14 has supported the frame, that is, the bracket mechanism 14 has entered the state of supporting the frame. Thus, without adding a sensor to detect the force on the tray 1421, the structure of the frame lifting machine 10 can be simplified, the cost can be saved, and the problem of affecting the detection of the force on the tray 1421 due to the failure of the sensor can be avoided.

[0055] The screw 12 is rotatably arranged on the machine body 11, and the specific connection mode therebetween can be set according to actual conditions.

[0056] For example, referring to Figure 5 The frame lifting machine 10 further comprises a tapered bearing 16, and the screw 12 is connected with the machine body 11 through the tapered bearing 16. Specifically, the outer surface of the tapered bearing 16 is connected with the machine body 11, and the screw 12 is rotatably arranged in the tapered bearing 16, so that the rotation of the screw 12 can be facilitated while the connection stability of the screw 12 and the machine body 11 is improved.

[0057] The bracket body 142 is used to support the frame, and the bracket body 142 can slide along the height direction relative to the machine body 11.

[0058] The nut seat 141 is threadedly connected with the screw 12, and through the rotation of the screw 12, the rotational motion of the screw 12 can be converted into the linear motion of the nut seat 141 along the height direction, so as to drive the bracket body 142 to ascend or descend along the height direction.

[0059] Actually, the nut seat 141 is connected with the bracket body 142, and the bracket body 142 can limit the nut seat 141 to rotate synchronously with the screw 12, so as to realize the linear motion of the nut seat 141 along the height direction.

[0060] It should be noted that the nut seat 141 and the bracket body 142 are connected through the extension part 1411 extending into the mounting port 142a to movably abut against the inner top wall of the mounting port 142a, so as to realize the connection therebetween.

[0061] Specifically, since the opening size of the mounting port 142a is larger than the size of the region of the extension part 1411 located in the mounting port 142a, the mounting port 142a and the extension part 1411 are not locked, and they can move relative to each other within a certain range.

[0062] For example, along the first direction, the opening size of the mounting hole 142a is larger than the size of the region where the extending part 1411 is located in the mounting hole 142a. Thus, the relative movement between the extending part 1411 and the mounting hole 142a along the first direction can exist within a certain size range, i.e., the relative movement between the nut seat 141 and the bracket body 142 along the first direction can exist within a certain size range. When the driving assembly 13 drives the screw rod 12 to rotate, since the nut seat 141 is not locked with the bracket body 142, the nut seat 141 can not only be lifted relative to the screw rod 12, but also can adjust its position by relative movement along the first direction to reduce the interaction force between the nut seat 141 and the screw rod 12 along the first direction, so that the bracket mechanism 14 can be better lifted along the height direction.

[0063] For example, along the first direction, the opening size of the mounting hole 142a is larger than the size of the region where the extending part 1411 is located in the mounting hole 142a. Thus, the relative movement between the extending part 1411 and the mounting hole 142a along the first direction can exist within a certain size range, i.e., the relative movement between the nut seat 141 and the bracket body 142 along the first direction can exist within a certain size range. When the driving assembly 13 drives the screw rod 12 to rotate, since the nut seat 141 is not locked with the bracket body 142, the nut seat 141 can not only be lifted relative to the screw rod 12, but also can adjust its position by relative movement along the first direction to reduce the interaction force between the nut seat 141 and the screw rod 12 along the first direction, so that the bracket mechanism 14 can be better lifted along the height direction.

[0064] For example, along the first direction, the opening size of the mounting hole 142a is larger than the size of the region where the extending part 1411 is located in the mounting hole 142a. Thus, the relative movement between the extending part 1411 and the mounting hole 142a along the first direction can exist within a certain size range, i.e., the relative movement between the nut seat 141 and the bracket body 142 along the first direction can exist within a certain size range. When the driving assembly 13 drives the screw rod 12 to rotate, since the nut seat 141 is not locked with the bracket body 142, the nut seat 141 can not only be lifted relative to the screw rod 12, but also can adjust its position by relative movement along the first direction to reduce the interaction force between the nut seat 141 and the screw rod 12 along the first direction, so that the bracket mechanism 14 can be better lifted along the height direction.

[0065] For example, along the first direction, the opening size of the mounting hole 142a is larger than the size of the region where the extending part 1411 is located in the mounting hole 142a. Thus, the relative movement between the extending part 1411 and the mounting hole 142a along the first direction can exist within a certain size range, i.e., the relative movement between the nut seat 141 and the bracket body 142 along the first direction can exist within a certain size range. When the driving assembly 13 drives the screw rod 12 to rotate, since the nut seat 141 is not locked with the bracket body 142, the nut seat 141 can not only be lifted relative to the screw rod 12, but also can adjust its position by relative movement along the first direction to reduce the interaction force between the nut seat 141 and the screw rod 12 along the first direction, so that the bracket mechanism 14 can be better lifted along the height direction.

[0066] In the process that the driving assembly 13 drives the screw rod 12 to rotate, so that the nut seat 141 drives the bracket main body 142 to ascend and descend along the height direction, since the opening size of the mounting hole 142a is larger, the extension part 1411 is not completely fixed between the mounting hole 142a and the inner top wall of the mounting hole 142a, and can move relatively along at least one of the first direction and the second direction, so that the position of the nut seat 141 can be adjusted along the first direction and / or the second direction, so as to reduce the radial force transmission of the nut seat 141 in the rotating process of the screw rod 12. That is, the stress of the screw rod 12 and the nut seat 141 along the radial direction can be reduced, so that the nut seat 141 and the bracket main body 142 can better ascend and descend along the height direction, thereby reducing the risk of damage of the screw rod 12 and the nut seat 141 and the like, making the stability of the wheel setting machine 10 better, and improving the safety performance of the wheel setting machine 10.

[0067] In an embodiment, referring to Figures 6 to 9 , the bracket main body 142 has two mounting holes 142a, and the two mounting holes 142a are arranged along the first direction. The nut seat 141 has two extension parts 1411, and the extension parts 1411 are arranged one by one corresponding to the mounting holes 142a. In this way, the connection stability between the bracket main body 142 and the nut seat 141 can be improved, and the nut seat 141 can be better adjusted in position by moving to reduce the radial force between the nut seat 141 and the screw rod 12.

[0068] In an embodiment, referring to Figure 6 and Figure 8 , the bracket main body 142 includes a tray 1421 and two first side plates 1422. The tray 1421 extends along the second direction. The two first side plates 1422 are respectively arranged on the opposite sides of the tray 1421 along the first direction. The first side plate 1422 has a mounting hole 142a. The nut seat 141 is located at the interval between the two first side plates 1422 and at the top side of the tray 1421. In this way, the connection stability between the nut seat 141 and the bracket main body 142 can be improved.

[0069] Specifically, the first side plate 1422 extends along the height direction, and the two first side plates 1422 are arranged along the first direction.

[0070] The tray 1421 and the nut seat 141 are arranged at the interval between the two first side plates 1422, and the nut seat 141 is located at the top side of the tray 1421.

[0071] In fact, the tray 1421 also has a avoiding space for the screw rod 12 to pass through.

[0072] In an embodiment, referring to Figure 7 , Figure 10 andFigure 11 The nut seat 141 comprises a seat body 1412, the seat body 1412 comprises a top plate 1413, a bottom plate 1414, at least one second side plate 1415 and at least one inclined plate 1416, the top plate 1413 and the bottom plate 1414 are arranged in a height direction, the second side plate 1415 and the inclined plate 1416 are arranged on at least one side of the top plate 1413 and the bottom plate 1414 in a first direction, the second side plate 1415 is connected with the top plate 1413 and the inclined plate 1416 respectively, and the second side plate 1415 extends in the height direction, the other end of the inclined plate 1416 is connected with the bottom plate 1414, and the inclined plate 1416 is inclined relative to the second side plate 1415 and the bottom plate 1414; the second side plate 1415, at least part of the top plate 1413 and at least part of the inclined plate 1416 jointly form a protruding portion 1411. In this way, the nut seat 141 can be conveniently abutted with the bracket body 142, and the structural stability of the nut seat 141 can be improved.

[0073] Specifically, the top plate 1413 and the bottom plate 1414 can be provided with the second side plate 1415 and the inclined plate 1416 on only one side in the first direction, or the top plate 1413 and the bottom plate 1414 can be respectively provided with the second side plate 1415 and the inclined plate 1416 on opposite sides in the first direction.

[0074] The top plate 1413, the bottom plate 1414, the second side plate 1415 and the inclined plate 1416 can be integrally formed, or can be separately formed.

[0075] The top plate 1413 movably abuts with the inner top wall of the mounting port 142a, and the top plate 1413 can be located in the mounting port 142a only in part regions to serve as part of the protruding portion 1411. Alternatively, the top plate 1413 can be located in the mounting port 142a in all regions to serve as part of the protruding portion 1411.

[0076] The inclined plate 1416 can be located in the mounting port 142a only in part regions to serve as part of the protruding portion 1411. Alternatively, the inclined plate 1416 can be located in the mounting port 142a in all regions to serve as part of the protruding portion 1411.

[0077] In an embodiment, referring to Figure 6 , Figure 10 and Figure 11 , the nut seat 141 comprises a seat body 1412, a main nut 1417 and a protection nut 1418, the seat body 1412 is connected with the bracket body 142, the main nut 1417 and the protection nut 1418 are threadedly connected with the lead screw 12 respectively, one of the main nut 1417 and the protection nut 1418 is located on the top side of the other, and the main nut 1417 is connected with the seat body 1412.

[0078] The nut seat 141 has a first working state and a second working state. When the nut seat 141 is in the first working state, the driving assembly 13 drives the driving screw 12 to rotate, so that the main nut 1417 drives the seat body 1412 and the bracket body 142 to move up and down along the height direction.

[0079] When the nut seat 141 is in the second working state, the driving assembly 13 drives the driving screw 12 to rotate, so that the protection nut 1418 drives the seat body 1412 and the bracket body 142 to move up and down along the height direction. Thus, when the nut seat 141 is in different states, the main nut 1417 and the protection nut 1418 can respectively drive the seat body 1412 and the bracket body 142 to move up and down along the height direction. The safety performance of the wheel lifting jack 10 can be greatly improved, the situation that the nut seat 141 slips and cannot hold the frame can be reduced, and the working stability of the wheel lifting jack 10 can be greatly improved.

[0080] Specifically, the main nut 1417 is a nut structure mainly used by the nut seat 141, and the protection nut 1418 is a nut structure used by the nut seat 141 for protection. The main function of the protection nut 1418 is to serve as a backup in case the main nut 1417 fails or in other situations.

[0081] The main nut 1417 and the protection nut 1418 are both threadedly connected with the screw 12. The main nut 1417 can be located on the top side of the protection nut 1418, or the protection nut 1418 can be located on the top side of the main nut 1417.

[0082] It should be noted that the main nut 1417 is always connected with the seat body 1412. When the nut seat 141 is in the first working state, the main nut 1417 works, and the protection nut 1418 does not work. The screw 12 rotates to drive the main nut 1417 to drive the seat body 1412 and the bracket body 142 to move up and down, and the force is mainly transmitted through the main nut 1417.

[0083] When the nut seat 141 is in the second working state, such as when the main nut 1417 slips and does not work, the protection nut 1418 works, and the main nut 1417 does not work. The screw 12 rotates to drive the protection nut 1418 to drive the seat body 1412 and the bracket body 142 to move up and down, and the force is mainly transmitted through the protection nut 1418.

[0084] Thus, in the normal working process, the protection nut 1418 does not work, which can reduce the wear of the protection nut 1418. When the main nut 1417 slips or is in other abnormal states and does not work, the protection nut 1418 works to ensure the safety, stability and reliability of the structure.

[0085] It should be noted that the specific setting mode of the protection nut 1418 can be set according to actual conditions.

[0086] For example, refer to Figure 10 and Figure 11 The nut seat 141 further comprises a limiting bolt 1419, the protective nut 1418 has a connecting hole, the limiting bolt 1419 passes through the connecting hole to be connected with the seat body 1412, and the extending length of the limiting bolt 1419 along the height direction is greater than the depth of the connecting hole along the height direction.

[0087] When the nut seat 141 is in the first working state, the protective nut 1418 can slide along the height direction relative to the limiting bolt 1419; when the nut seat 141 is in the second working state, the protective nut 1418 abuts against the limiting bolt 1419. Thus, it can be realized that the protective nut 1418 does not participate in work when the nut seat 141 is in the first working state, and the protective nut 1418 participates in work when the nut seat 141 is in the second working state, which can better improve the working stability of the nut seat 141.

[0088] Specifically, the protective nut 1418 is installed on the seat body 1412 through the limiting bolt 1419. Since the extending length of the limiting bolt 1419 along the height direction is greater than the hole depth size of the connecting hole, the limiting bolt 1419 does not fix the protective nut 1418, but can make the protective nut 1418 slide relative to the limiting bolt 1419.

[0089] Thus, when the nut seat 141 is in the first working state, the main nut 1417 normally works, and the protective nut 1418 can float up and down along the height direction. When the nut seat 141 is in the second working state, the main nut 1417 does not work, the seat body 1412 drives the limiting bolt 1419 to move downward under the action of gravity to abut against the protective nut 1418, and the protective nut 1418 participates in work.

[0090] In the description of the present application, the description of the terms "in an embodiment", "in some embodiments", "in a specific embodiment", or "exemplary" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the embodiments of the present application. In the present application, the exemplary description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0091] The above merely provides preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. A jacking plant characterised in that, The rack car includes: a machine body; a screw rod extending along a height direction of the rack car; a driving assembly drivingly connected with the screw rod; a bracket mechanism including a nut seat and a bracket body, one of the nut seat and the bracket body having a mounting opening, and the other having a protruding portion protruding into the mounting opening and movably abutting against an inner top wall of the mounting opening to connect the nut seat and the bracket body; an opening size of the mounting opening is greater than a size of an area where the protruding portion is located in the mounting opening along at least one of a first direction and a second direction; the first direction and the second direction are perpendicular to the height direction, respectively; the bracket body is slidably arranged on the machine body along the height direction, the nut seat is slidably arranged on the screw rod and threadedly connected with the screw rod, and the driving assembly drives the screw rod to rotate to drive the nut seat to drive the bracket body to ascend or descend along the height direction.

2. The truck jacks as claimed in claim 1, wherein, The bracket body has two mounting openings spaced apart along the first direction, and the nut seat has two protruding portions corresponding to the mounting openings.

3. The truck jacks as claimed in claim 2, wherein, The bracket body includes a tray extending along the second direction and two first side plates arranged on opposite sides of the tray along the first direction, respectively, the first side plates have the mounting openings, and the nut seat is located at an interval between the first side plates and on a top side of the tray.

4. The truck jacks as claimed in claim 1, wherein, The nut seat includes a seat body including a top plate, a bottom plate, at least one second side plate, and at least one inclined plate, the top plate and the bottom plate are spaced apart along the height direction, the top plate and the bottom plate are provided with the second side plate and the inclined plate on at least one side along the first direction, the second side plate is connected with the top plate and the inclined plate, respectively, and extends along the height direction, the other end of the inclined plate is connected with the bottom plate, and the inclined plate is inclined relative to the second side plate and the bottom plate; the second side plate, at least part of the top plate, and at least part of the inclined plate jointly form the protruding portion.

5. The truck jacks according to any one of claims 1-4, characterized in that, The driving assembly is located at a top end of the screw rod to be drivingly connected with the top end of the screw rod.

6. The truck jacks as claimed in claim 5, wherein, The rack car further includes a coupling arranged between the driving assembly and the screw rod to be connected with the driving assembly and the screw rod, respectively; and / or The rack car further includes a tapered bearing connecting the screw rod and the machine body.

7. The truck jacks according to any one of claims 1-4, characterized in that, The nut seat includes a seat body, a main nut, and a protection nut, the seat body is connected with the bracket body, the main nut and the protection nut are threadedly connected with the screw rod, respectively, and one of the main nut and the protection nut is located on a top side of the other, and the main nut is connected with the seat body. The nut seat has a first working state and a second working state, when the nut seat is in the first working state, the driving assembly drives the screw rod to rotate, so that the main nut drives the seat body and the bracket body to ascend or descend along the height direction; When the nut seat is in the second working state, the driving assembly drives the screw rod to rotate, so that the protection nut drives the seat body and the bracket body to ascend or descend along the height direction.

8. The truck jacks as claimed in claim 7, wherein, The nut seat further comprises a limiting bolt, the protection nut has a connecting hole, the limiting bolt passes through the connecting hole to connect with the seat body, the extension length of the limiting bolt along the height direction is greater than the depth of the connecting hole along the height direction; When the nut seat is in the first working state, the protection nut can slide along the height direction relative to the limiting bolt; when the nut seat is in the second working state, the protection nut abuts against the limiting bolt.

9. The truck jacks according to any one of claims 1-4, characterized in that, The driving assembly is a servo motor, the servo motor drives the screw rod to rotate to a set torque, so that the bracket mechanism enters the frame top supporting state.

10. A car jacking system characterized by, The frame lifting system comprises a forklift and the frame lifter according to any one of claims 1-9, the bottom end of the frame lifter forms a connecting space, the forklift abuts against the frame lifter by extending into the connecting space.

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