Transfer lifting appliance and frame production line

Abstract

The utility model relates to the technical field of vehicle frame transferring and transplanting, and particularly provides a transferring lifting appliance and a vehicle frame production line. The transfer lifting appliance comprises a lifting frame, a turntable arranged at the top of the lifting frame, and two groups of brackets respectively arranged on two sides of the bottom of the lifting frame, wherein a transmission mechanism is arranged between the turntable and each bracket; the rotating disc can be driven by external force to rotate, and the rotating rotating disc synchronously drives the supports to swing between the first position and the second position through the transmission mechanism. The bracket at the first position can avoid the to-be-transferred piece so as to allow the transfer lifting appliance to ascend and descend relative to the to-be-transferred piece; and each bracket at the second position can bear the bottom of the to-be-transferred piece. According to the transfer lifting appliance disclosed by the utility model, the bracket at the bottom of the lifting frame is driven to swing through the transmission mechanism by adopting a turntable driving mode, so that a piece to be transferred is loaded or unloaded on the transfer lifting appliance; and the overall size of the transfer lifting appliance can be effectively reduced, so that a to-be-transferred piece lifting and transferring scheme with a compact structure is provided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of frame transfer and transplanting, particularly relates to a transfer lifting appliance. BACKGROUND

[0002] In the field of automobile manufacturing, the frame transfer lifting appliance of the welding workshop is a necessary equipment; the key of the transfer lifting appliance is to hoist the semi-finished frame of the previous welding line together with the skid as a whole, to transfer the semi-finished frame to the next welding line through the elevator and the transfer track. Since the lifting appliance is used below the inside of the elevator, it is lifted by the elevator, and then the frame is hoisted from the moving roller bed. The inside span of the elevator must meet the space requirement when the transfer lifting appliance is opened, and the transfer lifting appliance cannot interfere with the transferred part (semi-finished frame and skid) when it is opened. At the same time, the transfer lifting appliance needs to hoist the skid, which will inevitably reduce the space utilization rate during lifting, and the overall structural strength of the lifting appliance needs to be ensured.

[0003] In the prior art, the frame carried by the lifting appliance adopts the form of telescopic fork, which is extended when carrying the frame, and the lifting appliance is raised; when the frame is separated, the lifting appliance is lowered, and the telescopic fork is retracted. However, the space occupied by the telescopic fork itself is relatively large, which requires the elevator itself to have a large span size, and the overall strength requirement is also high, resulting in waste of materials, and the telescopic fork also needs to improve the protection level of the work station, and the maintenance cost will also increase accordingly.

[0004] From the above situation, it can be seen that the transfer lifting appliance of the current welding workshop has the problems of low space utilization, high requirement for the strength of the elevator, and high equipment maintenance cost. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the utility model aims to provide a transfer lifting appliance to provide a compact structure of the transferred part hoisting and transferring scheme.

[0006] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0007] A transfer lifting appliance, comprising a lifting frame, a rotating disc arranged at the top of the lifting frame, and two groups of supports arranged at the bottom of the lifting frame on both sides, and a transmission mechanism arranged between the rotating disc and each support;

[0008] The rotating disc can be rotated under the action of external force, and the rotating disc drives each support to swing between the first position and the second position through the transmission mechanism; the support at the first position can avoid the transferred part to allow the transfer lifting appliance to lift relative to the transferred part; each support at the second position can be supported at the bottom of the transferred part.

[0009] Further, the hanger comprises a top frame, and vertical beams respectively downwardly extending from four corner portions of the top frame; the rotary disc is arranged at a middle portion of the top frame, and a bottom portion of each vertical beam is provided with a support, and two supports on the same side form a group.

[0010] Further, corner reinforcing plates are arranged between the top frame and the vertical beams, and / or reinforcing beams are connected between at least some adjacent vertical beams.

[0011] Further, a middle transverse beam is arranged at a middle portion of the top frame, the rotary disc is rotatably arranged on the middle transverse beam, and a push rod for driving the rotary disc to rotate is arranged on the rotary disc.

[0012] Further, the bottom portion of the vertical beam is provided with a first limiting plate and a second limiting plate, the support swinging towards the first position is limited to the first position by the first limiting plate, and the support swinging towards the second position is limited to the second position by the second limiting plate.

[0013] Further, a limiting column is arranged on the hanger, and a return spring is arranged between the hanger and the rotary disc; under the driving of the external force, the rotary disc rotates away from the limiting column and drives the support to swing to the first position; under the elastic force of the return spring, the rotary disc returns to the limiting column and drives the support to swing to the second position.

[0014] Further, corresponding to each support, a plurality of radially arranged extension arms are arranged on the rotary disc; the transmission mechanism comprises a vertically arranged transmission shaft and a connecting rod mechanism transmissionally connected between the extension arms and the transmission shaft, and the support is arranged at a bottom portion of the transmission shaft.

[0015] Further, the connecting rod mechanism comprises a first connecting rod fixedly arranged at a top portion of the transmission shaft, and a second connecting rod having two ends respectively hingedly connected to the first connecting rod and the extension arm.

[0016] Further, the length of the second connecting rod is greater than the length of the first connecting rod; the rotation angle of the rotary disc is between 20° and 45°, and the swinging angle of the support is greater than 90°.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The transfer lifting appliance adopts a rotating disc driving form, the supporting bracket at the bottom of the lifting frame is driven to swing by a transmission mechanism, the supporting bracket at the second position can reach the bottom of the to-be-transferred piece, and the to-be-transferred piece can be synchronously lifted when the lifting frame is lifted by the elevator, so that the to-be-transferred piece is lifted and transferred to the required position of the next production line; the supporting bracket at the first position can avoid the to-be-transferred piece, so that the to-be-transferred piece can be separated from the to-be-transferred piece during the lifting of the lifting frame driven by the elevator, so that the loading and unloading of the to-be-transferred piece on the transfer lifting appliance are realized; the rotating disc and the swing mode of the supporting bracket require a small action space, which is also beneficial to the setting of the transmission mechanism, and the overall size of the transfer lifting appliance can be effectively reduced, so that a compact to-be-transferred piece lifting and transferring scheme is provided.

[0019] In addition, the limiting column and the return spring are arranged on the lifting frame, the rotating disc can be constrained at the initial position abutting against the limiting column by the return spring, or be driven away from the limiting column to reach the away position of the set angle under external force; at this moment, the initial position is just corresponding to the second position of the supporting bracket, and the away position is corresponding to the first position of the supporting bracket; in this way, the rotating disc is rotated to the away position by using the driving device such as the cylinder and the motor, and when the rotating disc is released, the rotating disc can return to the initial position under the driving of the return spring, which not only simplifies the setting structure of the external force driving device, but also greatly reduces the driving state time of the driving device, and is beneficial to reducing the driving setting cost and power consumption of the transfer lifting appliance.

[0020] In addition, a plurality of extension arms are arranged on the rotating disc and are used to drive each supporting bracket to move, and a set of connecting rod mechanisms are arranged between each extension arm and the corresponding supporting bracket, so that the synchronous transmission between the extension arm and the supporting bracket can be well realized.

[0021] Another purpose of the utility model is to provide a vehicle frame production line, the vehicle frame production line is equipped with the transfer lifting appliance. ACCURACY OF DRAWINGS

[0022] The accompanying drawings which form a part of this specification are included to provide a further understanding of the specification and of the preferred embodiments of the specification, the method of and matter embodied therein, and are included solely by way of illustration of the specification. The reference signs in the drawings themselves are included to provide a clear, complete understanding of the specification, and are, accordingly, included in the patent specification. In the drawings:

[0023] Figure 1 It is an overall schematic view of the transfer lifting appliance;

[0024] Figure 2 It is Figure 1 It is a partial enlarged view of the part A shown in the figure;

[0025] Figure 3 For Figure 1 Fig. 4 is a local enlarged view of the part B shown in Fig. 1;

[0026] Figure 4 Fig. 6 is a structural schematic view of the transfer lifting appliance in the case of bearing the vehicle frame skid according to an embodiment of the present application.

[0027] Explanation of reference signs:

[0028] 1, hanger; 10, top frame; 100, middle beam; 101, corner reinforcing plate; 102, limiting column; 103, return spring; 104, lifting wheel; 11, vertical beam; 111, first limiting plate; 112, second limiting plate; 12, reinforcing beam;

[0029] 2, turntable; 20, push rod; 21, extended arm;

[0030] 3, transmission mechanism; 30, second connecting rod; 300, shaft pin; 31, first connecting rod; 32, transmission shaft;

[0031] 4, support; 5, vehicle frame skid. DETAILED DESCRIPTION

[0032] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0033] In the description of the present application, it should be stated that if the terms indicating the orientation or position relationship such as "up, down, left, right, front, back, inside and outside" appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application, and cannot be understood as a limitation on the present application that the indicated device or element must have a specific orientation, be constructed or operated in a specific orientation.

[0034] In addition, in the description of the present application, unless otherwise explicitly limited, the terms "mounting", "connecting", "connection" and "connecting member" should be understood broadly. For example, the connection can be a fixed connection, or a detachable connection, or an integral connection; can be a mechanical connection, or an electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application in combination with the specific circumstances. In the description of the present application, the limiting terms "first, second, A, B, C, D" and the like appear, which are only for distinguishing different positions, attributions or uses of the same features, to avoid ambiguity and confusion in the description, and cannot be understood as indicating or implying relative importance.

[0035] The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0036] Embodiment One

[0037] The present embodiment relates to a transfer hoist, which provides a compact hoisting and transferring scheme for a piece to be transferred; an exemplary structure thereof is shown in Figure 1 、 Figure 2 and Figure 3 .

[0038] Overall, the transfer hoist comprises a hanger 1, a rotating disc 2 arranged on the top of the hanger 1, and two groups of supporting brackets 4 arranged on the bottom of the hanger 1 respectively, and a transmission mechanism 3 arranged between the rotating disc 2 and each supporting bracket 4. The rotating disc 2 can rotate under the drive of external force, and the rotating rotating disc 2 synchronously drives each supporting bracket 4 to swing between a first position and a second position through the transmission mechanism 3; the supporting bracket 4 at the first position can avoid the piece to be transferred, so as to allow the transfer hoist to lift relative to the piece to be transferred; and each supporting bracket 4 at the second position can be supported on the bottom of the piece to be transferred.

[0039] It should be noted that, based on the overall design idea described above, the technical scheme of the present application can adopt various different specific implementation structures, forms or configuration sequences. For example, the hanger 1 described above can adopt various different specific structural forms such as a rectangular frame and a special-shaped bracket; the specific arrangement sequence, assembly mode, etc. of the rotating disc 2, the supporting bracket 4 and the transmission mechanism 3 on the hanger 1 can also be flexibly adjusted. For the parts required for the implementation of the overall scheme but not involved in the overall arrangement described above, reasonable and flexible design can be made by referring to the mature setting means in the art, the actual situation during implementation, etc. The specific implementation scheme described below in the present embodiment is only one of the relatively optimal schemes formed by various combinations and changes of the above, and in actual implementation, the skilled in the art can make flexible adjustment and improvement in combination with the actual situation. Obviously, the various specific form combinations and changes of the above can form many schemes, and the specific implementation scheme of the present embodiment is within the protection scope of the present application.

[0040] Specifically, the hanger 1 of the embodiment comprises a top frame 10 and four upright beams 11 respectively extending downward from four corner portions of the top frame 10; the rotary disc 2 is arranged at a middle portion of the top frame 10, and the bottom of each upright beam 11 is provided with a support 4, and two supports 4 on the same side form a group. In order to facilitate the processing and construction, the hanger 1 preferably adopts a rectangular frame structure, the top frame 10 is designed as a rectangle, and the four upright beams 11 are arranged at the four corner portions of the top frame 10 respectively. Two supports 4 on the same side are of course located on two upright beams 11 on the same side. The same side mentioned here can be one side of the length direction of the top frame 10 or one side of the width direction of the top frame 10; in the embodiment, the two sides of the width direction of the top frame 10 are taken as the grouping standard, that is, the two upright beams 11 connected by the two ends of the longer side of the top frame 10 form a group, and the two supports 4 at the bottom of the two upright beams 11 form a group of supports 4.

[0041] One upright beam 11 is arranged at each of the four corner portions of the top frame 10, and four supports 4 are correspondingly arranged, two supports 4 on the same side form a group, and the two groups of supports 4 lift the piece to be transported. In this way, two bearing points are formed at the two sides of the bottom of the piece to be transported, thereby forming a good lifting of the piece to be transported, and the transport hanger can stably lift the piece to be transported, thereby improving the lifting stability of the transport hanger.

[0042] In addition, as shown in Figure 1 and Figure 3 , the top frame 10 and the upright beams 11 of the embodiment are further provided with corner reinforcing plates 101; in addition, reinforcing beams 12 can be further arranged between at least some adjacent upright beams 11, and one reinforcing beam 12 is arranged between the upright beams 11 of the same group in the embodiment. The corner reinforcing plates 101 arranged between the top frame 10 and the upright beams 11 can improve the connection stability between the upright beams 11 and the top frame 10, and the reinforcing beams 12 arranged between the adjacent two upright beams 11 can further enhance the structural stability of the upright beams 11, thereby improving the overall structural strength of the hanger 1.

[0043] In order to facilitate the installation and arrangement of the rotary disc 2, a middle cross beam 100 is arranged at the middle portion of the top frame 10, the rotary disc 2 is rotatably arranged on the middle cross beam 100, and a lever 20 for driving the rotary disc 2 to rotate is arranged on the rotary disc 2. The middle cross beam 100 is arranged at the middle portion of the top frame 10, and the rotary disc 2 is arranged at the middle portion of the middle cross beam 100, thereby providing a suitable and stable installation basis for the arrangement of the rotary disc 2 on the top frame 10; the lever 20 on the rotary disc 2 can be conveniently driven by a cylinder, a motor or other driving devices, thereby enabling the rotary disc 2 to reciprocate within a suitable angle range, and thereby enabling each support 4 to swing between the first position and the second position, and thereby enabling the loading and unloading of the piece to be transported on the transport hanger to be well achieved.

[0044] Based on the setting of the upright beam 11, the bottom of the upright beam 11 of the embodiment is provided with a first limiting plate 111 and a second limiting plate 112. The support 4 swinging towards the first position is limited to the first position by the first limiting plate 111, and the support 4 swinging towards the second position is limited to the second position by the second limiting plate 112. When the swinging angle of the support 4 is 90°, the first limiting plate 111 and the second limiting plate 112 can be distributed at an angle of 90° to limit the swinging of the support 4 within the range of 90°. The setting of two limiting plates at the bottom of the upright beam 11 can limit the support 4 swinging to the set first position or the second position, so as to realize the avoidance or carrying and lifting of the parts to be transported.

[0045] As shown in Figure 2 , in addition to the setting of the turntable 2 on the top frame 10, the top frame 10 of the hanging bracket 1 of the embodiment is also provided with a limiting column 102, and a return spring 103 is arranged between the hanging bracket 1 and the turntable 2. Under the driving of external force, the turntable 2 rotates away from the limiting column 102 and drives the support 4 to swing to the first position. Under the driving of the elastic force of the return spring 103, the turntable 2 returns to the limiting column 102 and drives the support 4 to swing to the second position.

[0046] The setting of the limiting column 102 and the return spring 103 on the hanging bracket 1 can constrain the turntable 2 at the initial position abutting against the limiting column 102, or away from the limiting column 102 to the set angle of the away position under the driving of external force. At this moment, the initial position is just corresponding to the second position of the support 4, and the away position is corresponding to the first position of the support 4. In this way, the turntable 2 can return to the initial position under the driving of the return spring 103 by using the driving device such as the cylinder or the motor to drive the turntable 2 to rotate to the away position. This not only simplifies the setting structure of the external force driving device, but also greatly reduces the driving state time of the driving device, which is beneficial to reduce the driving setting cost and power consumption of the transfer hoist.

[0047] In addition, in order to better hoist the lifting transfer hoist, a plurality of lifting wheels 104 can be arranged on the top frame 10. The lifting machine adopts a cable to pass through the lifting wheel 104. When the lifting machine winds or unwinds the cable, the lifting wheel 104 plays a role similar to a pulley to make the whole transfer hoist lift under the driving of the lifting machine.

[0048] For the setting of the transmission mechanism 3 between the turntable 2 and the support 4, of course, there are many different structure schemes to choose from; for example, screw rod, gear and other transmission modes can be used. In the embodiment, as shown in Figure 1 and Figure 3As shown, the rotary disc 2 is provided with a plurality of radially arranged extension arms 21 corresponding to each support 4; the transmission mechanism 3 comprises a vertically arranged transmission shaft 32 and a linkage mechanism transmissionally connected between the extension arm 21 and the transmission shaft 32, and the support 4 is arranged at the bottom of the transmission shaft 32. The plurality of extension arms 21 arranged on the rotary disc 2 are respectively used to drive each support 4 to move, and a set of linkage mechanisms are arranged between each extension arm 21 and its corresponding support 4, so as to well realize the synchronous transmission between the extension arm 21 and the support 4. In the case that the above-mentioned upright beam 11 is arranged on the hanger 1, the hollow structure can be adopted for the upright beam 11, and the transmission shaft 32 is rotatably arranged in the cavity of the upright beam 11. The bottom end of the transmission shaft 32 is exposed below the upright beam 11 and is used to fix the support 4; the first limiting plate 111 and the second limiting plate 112 are fixed on the side wall of the upright beam 11 and are partially arranged on the path that can block the swing of the support 4.

[0049] Specifically, the linkage mechanism of the embodiment comprises a first linkage 31 fixed on the top of the transmission shaft 32 and a second linkage 30 having two ends respectively hingedly connected to the first linkage 31 and the extension arm 21; the two ends of the second linkage 30 are respectively hingedly connected to the extension arm 21 and the first linkage 31 through the shaft pin 300. By arranging the second linkage 30 and the first linkage 31 between the extension arm 21 and the transmission shaft 32, and by arranging appropriate linkage length and angle, the transmission ratio of the rotary disc 2 rotation and the support 4 swing can be changed, and the transmission purpose of realizing the swing of the support 4 in a larger angle range with a smaller rotary disc 2 rotation angle can be achieved.

[0050] The length of the second linkage 30 of the embodiment is greater than the length of the first linkage 31; the rotation angle of the rotary disc 2 is between 20° and 45°, and the swing angle of the support 4 is above 90°. By adopting the longer second linkage 30, the extension arm 21 and the first linkage 31 with appropriate length, the rotation of the rotary disc 2 can be controlled within the range of 20° to 45°, and the support 4 can be swung in the range above 90°, so that the support 4 located at the first position can completely avoid the relative up-down movement of the to-be-transported member, and the to-be-transported member swung to the second position can be supported in a larger size perpendicular to the length direction of the to-be-transported member, thereby reducing the setting structure size of the driving device of the rotary disc 2 and ensuring the hoisting and transporting reliability of the hoisting device.

[0051] In summary, the transfer lifting device of this embodiment adopts a turntable 2-driven mechanism. The transmission mechanism 3 drives the support 4 at the bottom of the lifting frame 1 to swing. When the support 4 swings to the second position, it can reach the bottom of the part to be transferred. When the elevator lifts the lifting frame 1, it can carry the part to be transferred and rise synchronously, thereby lifting and transferring the part to be transferred to the required position on the next production line. When the support 4 swings to the first position, it can avoid the part to be transferred. In this way, it can detach from the part to be transferred during the lifting process of the elevator driving the lifting frame 1, so as to realize the loading and unloading of the part to be transferred on the transfer lifting device. The rotation of the turntable 2 and the swing of the support 4 require less space and are also conducive to the setting of the transmission mechanism 3. The overall size of the transfer lifting device can be effectively reduced, thus providing a compact lifting and transfer solution for the part to be transferred.

[0052] Example 2

[0053] This embodiment relates to a vehicle frame production line, which is equipped with the transfer lifting device provided in Embodiment 1.

[0054] Combination Figure 4 and Figure 1 As shown, based on the overall setup of the transfer spreader in Embodiment 1, when the transfer spreader is applied to the chassis production line, the elevator first carries the transfer spreader to above the chassis skid 5, and then an external force moves the lever 20 to make the turntable 2 move along... Figure 1 The rotation is shown in direction a. The two supports 4 in the lower left side of the figure swing in directions b and b' respectively. The two supports 4 in the upper right side of the figure swing in directions c and c' respectively. All four supports 4 swing to the first position to avoid the frame skid 5. Then the elevator drives the transfer hoist to descend as a whole, so that each support 4 reaches below the frame skid 5.

[0055] At this moment, the external force releases the lever 20, and the turntable 2 returns to its original position under the pull of the return spring 103, causing each support 4 to swing back to its original position. Figure 4 As shown in the second position, the frame skid 5 is lifted below it, completing the loading of the frame skid 5. Then, the elevator drives the entire transfer spreader upwards, lifting the frame skid 5 and moving it to the set position of the next generation line. After reaching this position, it descends, and the lever 20 is moved again, causing each support 4 to temporarily swing to the first position, avoiding the frame skid 5. The transfer spreader then rises away from the frame skid 5, completing the unloading of the frame skid 5.

[0056] It can be seen that the entire loading and unloading action of the transfer spreader on the chassis skid 5 is completed within the frame space of the spreader 1. The rotation of the turntable 2 and the swing of the support 4 do not occupy the external space of the spreader 1, thereby greatly improving the space utilization rate of the transfer spreader in the chassis production line.

[0057] In actual application, the rotating rod 20 can be rotated by the motor to rotate the rotating disc 2 by about 30°, through the transmission of the second connecting rod 30, the first connecting rod 31 and the transmission shaft 32, each supporting frame 4 swings in a range of 90°, to ensure that the bottom of the transfer hoist can smoothly pass through and reach below the carriage skid 5; when reaching below the carriage skid 5, the motor returns to the original position, the rotating rod 20 is released, and the rotating disc 2 and each supporting frame 4 are returned by the driving force of the return spring 103; with the rising of the transfer hoist, the four supporting frames 4 contact and carry the carriage skid 5 to move. The cooperation of the limiting column 102 and the return spring 103 ensures that the rotating disc 2 will not be excessively rotated due to excessive spring force when rotating and returning, which is beneficial to improve the service life of the transfer hoist.

[0058] The transfer hoist of the utility model can effectively increase space utilization, avoid the problem that the elevator needs to increase the span size due to the large action space demand of the carriage production line, that is, the elevator motor selection is too large, the strength required by the elevator steel structure is large and the cost is high, thereby achieving the purposes of energy saving and reducing manufacturing cost. Moreover, compared with the traditional clamping, telescopic and other driving modes, the driving mode of rotating the rotating disc 2 to drive the supporting frame 4 to swing can effectively reduce the manufacturing cost and difficulty, and is beneficial to improve the hoisting efficiency.

[0059] The above is only a preferred embodiment of the utility model, and the detailed configuration explanation, specific structure setting form example, or assembly connection mode expression, etc. are all for the need of full disclosure, so as to better implement the utility model for the person skilled in the art, and not to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A transfer trolley, characterized in that: it comprises a trolley frame (1), a rotating disc (2) arranged on the top of the trolley frame (1), and two groups of supports (4) arranged on the bottom of the trolley frame (1) respectively, and a transmission mechanism (3) is arranged between the rotating disc (2) and each support (4); the rotating disc (2) can rotate under the drive of an external force, and the rotating disc (2) drives each support (4) to swing between a first position and a second position through the transmission mechanism (3); the support (4) at the first position can avoid the to-be-transferred part to allow the transfer trolley to lift relative to the to-be-transferred part; each support (4) at the second position can be supported on the bottom of the to-be-transferred part; a limiting column (102) is arranged on the trolley frame (1), and a return spring (103) is arranged between the trolley frame (1) and the rotating disc (2); the trolley frame (1) comprises a top frame (10), and a middle cross beam (100) is arranged at the middle of the top frame (10), and the rotating disc (2) is rotatably arranged at the middle position of the middle cross beam (100); corresponding to each support (4), a plurality of radial extension arms (21) are arranged on the rotating disc (2), and the return spring (103) is hung between the middle cross beam (100) and one extension arm (21); under the drive of the external force, the rotating disc (2) rotates away from the limiting column (102) and drives the support (4) to swing to the first position; under the drive of the elastic force of the return spring (103), the rotating disc (2) returns to the limiting column (102) and drives the support (4) to swing to the second position.

2. The transfer trolley according to claim 1, characterized in that: the trolley frame (1) comprises upright beams (11) downwardly extending from four corners of the top frame (10) respectively; the rotating disc (2) is arranged at the middle position of the top frame (10), the bottom of each upright beam (11) is provided with one support (4), and two supports (4) on the same side form a group.

3. The transfer trolley according to claim 2, characterized in that: corner reinforcing plates (101) are arranged between the top frame (10) and the upright beams (11), and / or at least part of the adjacent two upright beams (11) are connected by reinforcing beams (12).

4. The transfer trolley according to claim 2, characterized in that: a middle cross beam (100) is arranged at the middle of the top frame (10), the rotating disc (2) is rotatably arranged on the middle cross beam (100), and a lever (20) for driving the rotating disc (2) to rotate is arranged on the rotating disc (2).

5. The transfer trolley according to claim 2, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ The upright beam (11) is provided with a first limiting plate (111) and a second limiting plate (112), the support (4) swinging towards the first position is limited to the first position by the first limiting plate (111), and the support (4) swinging towards the second position is limited to the second position by the second limiting plate (112).

6. The transfer hanger according to any one of claims 1 to 5, characterized in that: The transmission mechanism (3) comprises a vertically arranged transmission shaft (32) and a linkage mechanism transmissionally connected between the extension arm (21) and the transmission shaft (32), and the support (4) is arranged at the bottom of the transmission shaft (32).

7. The transfer hanger according to claim 6, characterized in that: The linkage mechanism comprises a first linkage (31) fixedly arranged at the top of the transmission shaft (32) and a second linkage (30) hingedly connected at two ends to the first linkage (31) and the extension arm (21) respectively.

8. The transfer hanger according to claim 7, characterized in that: The length of the second linkage (30) is greater than the length of the first linkage (31); the rotation angle of the rotating disc (2) is between 20° and 45°, and the swinging angle of the support (4) is above 90°.

9. A vehicle frame production line, characterized in that: The vehicle frame production line is provided with the transfer hanger according to any one of claims 1 to 8.

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