Scissor fork type lifting mechanism and carrying equipment

Abstract

The utility model discloses a scissor fork type lifting mechanism which comprises a bottom mounting plate, a lifting table top, a scissor fork mechanism and a driving mechanism, the scissor fork mechanism and the driving mechanism are arranged on the bottom mounting plate, the scissor fork mechanism is arranged at the bottom of the lifting table top, the driving mechanism comprises a power source and a swing arm assembly, one end of the swing arm assembly is in transmission connection with a lifting motor, and the other end of the swing arm assembly is in transmission connection with the lifting motor. The other end of the swing arm assembly is fixedly connected with the lifting table top, the power source drives the swing arm assembly to drive the lifting table top to ascend and descend, and the shear fork mechanism stretches or retracts along with ascending and descending of the lifting table top. The utility model further discloses carrying equipment comprising the scissor type lifting mechanism. According to the utility model, the advantages of torque driving and the scissor fork mechanism are integrated, and the advantages of high stability, accurate control and high load capacity are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of handling equipment, in particular to a scissor-type lifting mechanism. Background Art

[0002] During the handling process, a lifting mechanism is often used to achieve the lifting and lowering of materials during the handling process.

[0003] The electric lifting mechanism in the related art uses a connecting rod mechanism or a screw drive to achieve the lifting function, or uses a screw lifting mechanism to achieve the lifting function. However, when a connecting rod mechanism, a screw and a screw lifting mechanism are used, the overall device is large in size, making installation difficult, the cost high, and the anti-eccentric load and load capacity are weak.

[0004] Most of the lifting mechanisms of the scissor-type structure in the related art adopt hydraulic transmission, and a few adopt screw transmission. However, hydraulic transmission is greatly affected by temperature changes, has low transmission efficiency, low stroke control accuracy, and hydraulic oil leakage in long-term use. When screw transmission is used, the lifting stability is poor and the load capacity is weak. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model provides a scissor-type lifting mechanism and handling equipment with high stability, precise control and high load capacity.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A scissors-type lifting mechanism includes a bottom mounting plate, a lifting table, a scissors mechanism, and a driving mechanism. The scissors mechanism and the driving mechanism are arranged on the bottom mounting plate, and the scissors mechanism is arranged at the bottom of the lifting table. The driving mechanism includes a power source and a swing arm assembly. One end of the swing arm assembly is transmission-connected to the power source, and the other end of the swing arm assembly is fixedly connected to the lifting table. The power source outputs torque to drive the swing arm assembly to drive the lifting table to move up and down, and the scissors mechanism follows the lifting of the lifting table to achieve extension or contraction movement.

[0008] In this technical solution, a lifting structure is proposed which drives a scissors mechanism to perform rising and lowering actions through a swing arm. The lifting structure has high stability and precise control during the lifting process, so that the lifting mechanism has a strong carrying capacity. In addition, the overall structure is relatively compact and easy to install.

[0009] Preferably, the scissors-type mechanism includes a first fork arm, a second fork arm, and a sliding trough body. The middle part of the first fork arm and the middle part of the second fork arm are rotatably connected to form a scissors-type structure. One end of the first fork arm is connected to the bottom mounting plate, and the other end of the first fork arm is connected to the lifting platform. One end of the second fork arm is connected to the sliding trough body, and the other end of the second fork arm is connected to the lifting platform.

[0010] Preferably, a table hinge pin is provided at one end of the bottom of the lifting table, an upper slider slidably connected to the lifting table is provided at the other end of the bottom of the lifting table, one end of the second fork arm is rotatably connected to the lifting table through the table hinge pin, one end of the first fork arm is rotatably connected to the upper slider through the upper slider shaft, the lower sliding trough body is provided with a lower slider slidably connected to the lower trough body, one end of the second fork arm is rotatably connected to the lower slider through the lower slider shaft, a mounting seat is provided on the bottom mounting plate, the mounting seat is provided with a bottom hinge pin, and one end of the first fork arm is rotatably connected to the bottom mounting plate through the bottom hinge pin.

[0011] Preferably, the driving mechanism also includes a reducer and a gear transmission mechanism. The reducer is fixed to the bottom mounting plate through the reducer mounting plate. The reducer is connected to the output shaft of the lifting motor through a transmission connection. The gear transmission mechanism includes a first gear arranged on the output shaft of the reducer and a second gear assembly arranged on the bottom mounting plate. The second gear assembly includes a second gear and a gear shaft. The first gear and the second gear are meshed with each other. The diameter of the second gear is larger than that of the first gear. A mounting seat is provided on the bottom mounting plate. Both ends of the gear shaft are respectively rotatably connected to the mounting seat. The first gear is fixedly connected to the gear shaft.

[0012] Preferably, the swing arm assembly includes a first swing arm, a second swing arm, and a swing arm pin, the first swing arm and the second swing arm are arranged at both ends of the swing arm pin, and the swing arm pin is fixedly connected to the gear shaft through connecting arms arranged at both ends of the swing arm pin, so that the swing arm assembly rotates with the gear shaft. The lifting motor drives the lifting of the lifting platform through the gear transmission mechanism and the swing arm assembly, which can provide a larger load force and better stability.

[0013] Preferably, the first fork arm includes two first arms spaced apart, and the second fork arm includes two second arms spaced apart, thereby increasing the number of supporting points, achieving a multi-point supporting effect for the lifting platform and the scissor mechanism, and improving the stability of the overall structure.

[0014] Preferably, the front of the lifting platform is the load surface, the back of the lifting platform is connected to the scissor mechanism and the swing arm assembly, the back of the lifting platform is provided with an upper slide groove for installing the upper slider, the upper slider is slidably installed in the upper slide groove, the lower slide groove body is provided with a lower slide groove, and the lower slider is slidably connected in the lower slide groove, so that the installation and operation of the slider are more stable.

[0015] Preferably, a mounting hole for mounting the gear shaft is provided on the mounting seat, and a bushing or a bearing is installed between the gear shaft and the mounting hole, so that the gear shaft can rotate more smoothly, reduce friction resistance during transmission, and improve efficiency.

[0016] Preferably, the middle parts of the first fork arm and the second fork arm are rotatably connected via an intermediate pin.

[0017] Preferably, the power source is set as a lifting motor, and the lifting motor is provided with a holding brake. The operation is safe and reliable, and the potential safety hazards caused by the rapid descent due to power failure are avoided.

[0018] A second aspect of the present application discloses a transport device, comprising a movable chassis and the scissor-type lifting mechanism of the first aspect, wherein the scissor-type lifting mechanism is mounted on the movable chassis via a bottom mounting plate.

[0019] The advantages of the handling equipment disclosed in the present application are similar to those of the scissor-type lifting mechanism disclosed in the first aspect, and will not be repeated here.

[0020] These features and advantages of the utility model will be disclosed in detail in the following specific embodiments and drawings. The best implementation or means of the utility model will be fully presented in conjunction with the drawings, but it is not a limitation of the technical solution of the utility model. In addition, these features, elements and components appearing in each of the following texts and drawings are multiple, and are marked with different symbols or numbers for convenience, but all represent components with the same or similar structure or function. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] Figure 1 This is an overall structural diagram of one embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of a scissor mechanism of one embodiment of the utility model;

[0024] Figure 3 A schematic diagram of a driving mechanism of one embodiment of the utility model;

[0025] Figure 4 It is a cross-sectional schematic diagram of the movement route of the lifting mechanism of the utility model under the action of load;

[0026] Figure 5 This is an exploded view of the overall structure of the lifting mechanism of one embodiment of the utility model;

[0027] Figure 6 This is a schematic diagram of the lifting table structure of one embodiment of the utility model;

[0028] Figure 7 This is a schematic diagram of the outer fork arm structure of one embodiment of the utility model;

[0029] Figure 8 This is a schematic diagram of the inner fork arm structure of one embodiment of the utility model.

[0030] in,

[0031] 10. Lifting table; 11. Table hinge pin; 12. Upper slide; 13. Upper slide block; 14. Upper slide block shaft;

[0032] 21, first fork arm; 211, first support arm; 22, second fork arm; 221, second support arm; 23, lower slide trough; 231, lower slide trough; 232, lower slider; 234, lower slider shaft; 24, middle pin shaft; 25, bottom hinge pin shaft;

[0033] 31. Lifting motor; 321. First swing arm; 322. Second swing arm; 323. Swing arm pin; 33. Speed ​​reducer; 34. First gear; 35. Second gear; 36. Gear shaft; 37. Rotating connecting piece; 38. Connecting arm; 39. Synchronous belt;

[0034] 40. Bottom mounting plate; 41. Mounting seat; 411. Mounting hole; 42. Reducer mounting plate. DETAILED DESCRIPTION

[0035] The following is a detailed description of embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments in the implementation manner are intended to be used to explain the present invention and should not be construed as limiting the present invention.

[0036] References to "one embodiment" or "an example" or "an example" in this specification mean that a particular feature, structure, or characteristic described in conjunction with the embodiment itself may be included in at least one embodiment disclosed in the present application. The appearance of the phrase "in one embodiment" in various places in the specification does not necessarily refer to the same embodiment.

[0037] There are a large number of scissor lift mechanisms on the market, but most of them are hydraulically driven, a few are electrically driven, and most of the electrically driven scissor lifts are driven by electric push rods or lead screw nuts. There is no mechanism that uses an electric swing arm to drive the scissor lift mechanism to perform the lifting function.

[0038] Based on this, see Appendix Figure 1-8One of the embodiments of the present application provides a scissor-type lifting mechanism, including a bottom mounting plate 40, a lifting table 10, a scissor-type mechanism, and a driving mechanism. The scissor-type mechanism and the driving mechanism are arranged on the bottom mounting plate 40, and the scissor-type mechanism is arranged at the bottom of the lifting table 10, wherein the front of the lifting table 10 is arranged as a load surface for placing materials to be transported, and the bottom of the lifting table 10 is the end surface opposite to the load surface. During use, the scissor-type mechanism will extend or retract with the lifting of the lifting table 10 to ensure the stability of the lifting table 10 during movement. During the lifting and lowering of the lifting table 10, the load surface is always in a horizontal state to ensure the stability of the material thereon. The driving mechanism in this embodiment includes a power source and a swing arm assembly. One end of the swing arm assembly is transmission-connected to the lifting motor 31, and the other end of the swing arm assembly is fixedly connected to the lifting table 10. The power source drives the swing arm assembly to drive the lifting table 10 to move up and down. It can be seen that the utility model proposes a lifting mechanism of an electric swing arm combined with a scissor-type mechanism. When in use, the scissor-type mechanism is driven by electricity to perform the rising and falling actions. The electric drive method is adopted, and the lifting process has high stability and precise control. In addition, through the design of the scissor-type mechanism and the swing arm assembly, the lifting mechanism has a strong load-bearing capacity, which combines the advantages of both the electric drive and the scissor-type mechanism.

[0039] The power source in the present application adopts a power component that can output torque, such as a hydraulic motor, an electric motor, etc. The torque output is convenient for controlling the precise control of the rotation angle. The present application is preferably a lifting motor, which is described in detail below using the lifting motor as an example.

[0040] One embodiment of the scissor mechanism in the present application includes a first fork arm 21, a second fork arm 22, and a sliding chute body 23. The middle part of the first fork arm 21 and the middle part of the second fork arm 22 are rotatably connected to form a scissor structure. One end of the first fork arm 21 is connected to the bottom mounting plate 40, and the other end of the first fork arm 21 is connected to the lifting platform 10. One end of the second fork arm 22 is connected to the sliding chute body 23, and the other end of the second fork arm 22 is connected to the lifting platform 10. The first fork arm 21 and the second fork arm 22 in the present application represent two components that form the scissor mechanism. In actual design, the first fork arm 21 and the second fork arm 22 can be set as shown in the attached figure. Figure 7 , 8 The structure of the outer fork arm and the inner fork arm shown in the figure, of course, in some scenarios, the first fork arm 21 and the second fork arm 22 can also be set to be the same component. There is no specific restriction on the specific structure of the first fork arm 21 and the second fork arm 22, as long as the function of the scissors-type mechanism can be realized.

[0041] A table hinge pin is provided at one end of the bottom of the lifting table 10 in the utility model, and the table hinge pin is assembled and connected to the lifting table 10, and an upper slider 13 slidingly connected to the lifting table 10 is provided at the other end of the bottom of the lifting table 10, one end of the second fork arm 22 is rotatably connected to the lifting table 10 through the table hinge pin 11, one end of the first fork arm 21 is rotatably connected to the upper slider 13 through the upper slider shaft 14, the lower sliding trough body 23 is provided with a lower slider 232 slidingly connected to the lower sliding trough body 23, one end of the second fork arm 22 is rotatably connected to the lower slider 232 through the lower slider shaft 234, a mounting seat 41 is provided on the bottom mounting plate 40, and the mounting seat 41 is provided with a bottom hinge pin 25, and one end of the first fork arm 21 is rotatably connected to the bottom mounting plate 40 through the bottom hinge pin 25. The setting of the upper slider 13 and the lower slider 232 can adapt to the extension or contraction movement of the scissors-type mechanism. When setting, the table hinge pin and the upper slider 13 are set at the positions of the two opposite ends of the lifting table 10, so that the connection parts of the first fork arm 21 or the second fork arm 22 and the lifting table 10 can be located at the two ends of the lifting table 10, and the lifting table 10 is supported from both ends of the lifting table 10, thereby improving the stability of the support for the lifting table 10.

[0042] The driving mechanism of one embodiment of the utility model further includes a reducer 33 and a gear transmission mechanism. The reducer 33 is fixed to the bottom mounting plate 40 through a reducer mounting plate 42. The reducer 33 is connected to the output shaft of the lifting motor 31 by transmission. The gear transmission mechanism includes a first gear 34 arranged on the output shaft of the reducer 33 and a second gear 35 assembly arranged on the bottom mounting plate 40. The second gear 35 assembly includes a second gear 35 and a gear shaft 36. The first gear 34 and the second gear 35 are meshed with each other. The diameter of the second gear 35 is larger than that of the first gear 34. A mounting seat 41 is arranged on the bottom mounting plate 40. Both ends of the gear shaft 36 are respectively connected to the mounting seat 41 by rotation. The first gear 34 is fixedly connected to the gear shaft 36. The gear transmission mechanism has the advantages of large transmission power, long service life, stable operation and high reliability. The lifting mechanism can have a higher load capacity when matched with the swing arm assembly. The diameter of the second gear 35 is larger than that of the first gear 34. In the transmission process, the lifting movement speed is reduced by increasing the speed ratio, thereby improving the stability of the lifting action.

[0043] The swing arm assembly of one embodiment of the present application includes a first swing arm 321, a second swing arm 322, and a swing arm pin 323. The first swing arm 321 and the second swing arm 322 are arranged at both ends of the swing arm pin 323. The swing arm pin 323 is fixedly connected to the gear shaft 36 through connecting arms 38 arranged at both ends of the swing arm pin 323, so that the swing arm assembly rotates with the gear shaft 36. The swing arm assembly of this embodiment includes two swing arms, namely the first swing arm 321 and the second swing arm 322. In actual arrangement, the first swing arm 321 and the second swing arm 322 are spaced apart, which can not only improve the power transmission capacity, but also improve the stability of the support of the lifting platform 10. In the specific assembly, the first swing arm 321 and the second swing arm 322 can be fixedly connected to the two ends of the table hinge pin 11 of the lifting platform 10, respectively. The first swing arm 321 and the second swing arm 322 are connected into a whole through the swing arm pin 323. Of course, it is easy to think that during production, the first swing arm 321, the second swing arm 322 and the swing arm pin 323 can be directly integrally formed, and of course they can also be assembled to form a whole.

[0044] The swing arm assembly in this embodiment is fixedly connected to the gear shaft 36. The rotation of the second gear 35 can drive the rotation of the gear shaft 36, and then drive the rotation of the swing arm assembly. The gear shaft 36 and the swing arm assembly rotate synchronously and at the same speed. Of course, in actual use, a transmission structure can be added between the gear shaft 36 and the swing arm assembly to realize the power transmission between the two.

[0045] Each end of the first fork arm 21 and the second fork arm 22 of the present invention is provided with at least two spaced connection portions. Figure 7 , 8 The first fork arm 21 and the second fork arm 22 are both frame structures. The first fork arm 21 includes two first arms 211, and the two first arms 211 are connected by a connecting column or a connecting tube. Similarly, the second fork arm 22 includes two second arms 221, and the two second arms 221 are connected by a connecting column or a connecting tube. When setting, the number of connecting columns or connecting tubes can be set to two and respectively set at the two ends of the first arm 211 and the second arm 221. Of course, two connecting columns or two connecting columns can be set at the same time, or a combination of a connecting column and a connecting tube can be set. When a connecting tube is used, the connecting tube can be used as the installation base of the upper slider shaft 14 or the lower slider shaft 234, so that the upper slider shaft 14 or the lower slider shaft 234 is hidden in the connecting tube, which can improve the overall appearance effect and the life of the upper slider shaft 14 or the lower slider shaft 234. During assembly, by increasing the number of supporting points, multi-point support is achieved for the lifting platform 10 and the scissor mechanism, thereby improving the stability of the overall structure.

[0046] In order to further improve the overall load capacity of the lifting mechanism, the back of the lifting table 10 of the utility model is provided with an upper slide groove 12 for installing the upper slider 13, the upper slider 13 is slidably installed in the upper slide groove 12, and a lower slide groove 231 is provided on the lower slide groove body 23, and the lower slider 232 is slidably connected in the lower slide groove 231. The setting of the upper slide groove 12 and the lower slide groove 231 makes the installation and operation of the slider more stable. Since the upper slider 13 and the lifting table 10, and the lower slider 232 and the lower slide groove body 23 are all in surface contact, the contact area between the fork arm and the lifting table 10 is increased. During use, the stability of the lifting action can be increased and the load capacity of the lifting mechanism can be improved. The lower slide groove body 23 is installed on the base member (generally on the body of the handling equipment) during the setting, as a sliding support member for the lower slider 232.

[0047] See attached Figure 2 , 5 The mounting seat 41 of the utility model is provided with a mounting hole 411 for mounting the gear shaft 36, and a bushing or a bearing is installed between the gear shaft 36 and the mounting hole 411, wherein the bushing can be a copper sleeve to reduce wear. By providing a bushing or a bearing, the friction resistance in the transmission process can be reduced, the efficiency can be improved, and the rotation of the gear shaft 36 can be smoother. In addition, it can be seen that the mounting seat 41 in the utility model is not only used to install the gear shaft 36, but also serves as the installation basis of the bottom hinge pin 25. The gear shaft 36 and the bottom hinge pin 25 are connected to the same component, and the gear shaft 36 and the bottom hinge pin 25 are parallel to each other, which can improve the compactness of the overall structure. Of course, in actual design, it can also be set as two different components to install the bottom hinge pin 25 and the gear shaft 36 respectively.

[0048] The middle parts of the first fork arm 21 and the second fork arm 22 in the utility model are rotatably connected by the middle pin shaft 24. In this way, both the first fork arm 21 and the second fork arm 22 can rotate around the middle pin shaft 24, thereby being able to adapt to the lifting movement of the lifting platform 10.

[0049] In order to improve the safety of the lifting mechanism, the lifting motor 31 of the utility model is provided with a holding brake, which ensures safe and reliable operation and avoids potential safety hazards caused by rapid descent due to power failure.

[0050] When the utility model is actually set up, copper sleeves for reducing wear can be set at the rotating connection parts, thereby increasing the overall service life, making the operation of the lifting mechanism more stable, and improving the handling efficiency.

[0051] When the utility model is actually used, the movement section of the lifting mechanism under the load is as follows Figure 4As shown, the lifting motor 31 drives the first gear 34 on the output end of the reducer to rotate through a synchronous belt 39 (of course, in actual design, it can also be set to other transmission methods, such as gear transmission or chain transmission), and the first gear 34 and the second gear 35 are engaged. Since the diameter of the second gear 35 is larger than that of the first gear 34, the lifting movement speed can be reduced by increasing the speed ratio. The first gear 34 on the reducer drives the second gear 35 to rotate, thereby realizing the rotation of the connecting arm 38, and further driving the swing arm pin 323 installed on the connecting arm 38 to rotate. Since one end of the first swing arm 321 and the second swing arm 322 are fixed on the swing arm pin 323, and the other end of the first swing arm 321 and the second swing arm 322 are fixed on the table hinge pin 11, the up and down rotation of the swing arm pin 323 will drive the first swing arm 321 and the second swing arm 322 to move up and down against the lifting table 10. Since the upper slider 13 and the lower slider 232 can slide and move, the middle pin 24, the upper slider shaft 14, the lower slider shaft 234, the bottom hinge pin 25 and the table hinge pin 11 can rotate flexibly at the joint position, so that they can well adapt to the up and down movement of the lifting mechanism.

[0052] The utility model adopts a lifting motor 31, a reducer, a first gear 34, a second gear 35 and a swing arm assembly to drive the scissor mechanism to move up and down to achieve the lifting function. The hydraulic drive is abandoned, and the hydraulic transmission is avoided to be greatly affected by temperature changes, the transmission efficiency is low, the stroke control accuracy is low, and there is a hidden danger of hydraulic oil leakage in long-term use. Moreover, the lifting motor 31 in the present application can itself have a brake, and emergency braking can be performed when a fault occurs. The operation is safe and reliable, and the problem of rapid descent caused by power failure is avoided.

[0053] One of the embodiments of the present application discloses a transport device, comprising a movable chassis and a scissor-type lifting mechanism of the first aspect, wherein the scissor-type lifting mechanism is mounted on the movable chassis via a bottom mounting plate.

[0054] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention shall be included in the scope of the claims.

Claims

1. A scissor-type lifting mechanism, comprising a bottom mounting plate (40), a lifting platform (10), a scissor-type mechanism, and a driving mechanism, wherein the scissor-type mechanism and the driving mechanism are arranged on the bottom mounting plate (40), and the scissor-type mechanism is arranged at the bottom of the lifting platform (10), characterized in that: The driving mechanism comprises a power source and a swing arm assembly, one end of the swing arm assembly is transmission-connected to the power source, and the other end of the swing arm assembly is fixedly connected to a lifting platform (10). The power source drives the swing arm assembly to rotate to drive the lifting platform (10) to move up and down, and the scissor mechanism follows the lifting movement of the lifting platform (10) to extend or retract.

2. The scissor-type lifting mechanism according to claim 1, characterized in that: The scissor-type mechanism comprises a first fork arm (21), a second fork arm (22), and a sliding trough body (23); the middle portion of the first fork arm (21) and the middle portion of the second fork arm (22) are rotatably connected via an intermediate pin shaft (24) to form a scissor-type structure; one end of the first fork arm (21) is connected to the bottom mounting plate (40), and the other end of the first fork arm (21) is connected to the lifting platform (10); one end of the second fork arm (22) is connected to the sliding trough body (23), and the other end of the second fork arm (22) is connected to the lifting platform (10).

3. The scissor-type lifting mechanism according to claim 2, characterized in that: A table top hinge pin (11) is provided at one end of the bottom of the lifting table top (10), and an upper slider (13) slidably connected to the lifting table top (10) is provided at the other end of the bottom of the lifting table top (10); one end of the second fork arm (22) is rotatably connected to the lifting table top (10) through the table top hinge pin (11); one end of the first fork arm (21) is rotatably connected to the upper slider (13) through the upper slider shaft (14); the lower slide trough body (23) is provided with a lower slider (232) slidably connected to the lower slide trough body (23); one end of the second fork arm (22) is rotatably connected to the lower slider (232) through the lower slider shaft (234); a mounting seat (41) is provided on the bottom mounting plate (40); the mounting seat (41) is provided with a bottom hinge pin (25); one end of the first fork arm (21) is rotatably connected to the bottom mounting plate (40) through the bottom hinge pin (25).

4. The scissor-type lifting mechanism according to claim 1, characterized in that: The driving mechanism further comprises a reducer (33) and a gear transmission mechanism. The reducer (33) is fixed to the bottom mounting plate (40) through the reducer (33) mounting plate. The reducer (33) is transmission-connected to the output shaft of the power source. The gear transmission mechanism comprises a first gear (34) arranged on the output shaft of the reducer (33) and a second gear (35) assembly arranged on the bottom mounting plate (40). The second gear (35) assembly comprises a second gear (35) and a gear shaft (36). The first gear (34) and the second gear (35) are meshed with each other. The diameter of the second gear (35) is larger than that of the first gear (34). A mounting seat (41) is arranged on the bottom mounting plate (40). Both ends of the gear shaft (36) are rotationally connected to the mounting seat (41) respectively. The first gear (34) is fixedly connected to the gear shaft (36).

5. The scissor-type lifting mechanism according to claim 4, characterized in that: The swing arm assembly comprises a first swing arm (321), a second swing arm (322), and a swing arm pin shaft (323); the first swing arm (321) and the second swing arm (322) are arranged at two ends of the swing arm pin shaft (323); the swing arm pin shaft (323) is fixedly connected to the gear shaft (36) via connecting arms (38) arranged at two ends of the swing arm pin shaft (323), so that the swing arm assembly rotates along with the gear shaft (36).

6. The scissor-type lifting mechanism according to claim 3, characterized in that: The first fork arm (21) comprises two first support arms (211) which are spaced apart from each other, and the second fork arm (22) comprises two second support arms (221) which are spaced apart from each other.

7. The scissor-type lifting mechanism according to claim 3, characterized in that: The front side of the lifting platform (10) is a load surface, and the back side of the lifting platform (10) is connected to the scissor mechanism and the swing arm assembly. The back side of the lifting platform (10) is provided with an upper slide groove (12) for installing the upper slider (13), and the upper slider (13) is slidably installed in the upper slide groove (12). The lower slide groove body (23) is provided with a lower slide groove (231), and the lower slider (232) is slidably connected in the lower slide groove (231).

8. The scissor-type lifting mechanism according to claim 4, characterized in that: The mounting seat (41) is provided with a mounting hole (411) for mounting the gear shaft (36), and a bushing or a bearing is installed between the gear shaft (36) and the mounting hole (411).

9. The scissor-type lifting mechanism according to any one of claims 1 to 8, characterized in that: The power source is provided as a lifting motor (31), and the lifting motor (31) is provided with a holding brake.

10. A handling device comprising a movable chassis, characterized in that: It also comprises a scissor-type lifting mechanism as claimed in any one of claims 1 to 9, wherein the scissor-type lifting mechanism is mounted on a movable chassis via a bottom mounting plate (40).

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