Supporting mechanism and automatic circuit breaker transfer trolley

Abstract

The utility model relates to the technical field of overhaul and maintenance of a low-voltage distribution switch cabinet in an electric power system, in particular to a supporting mechanism and an automatic circuit breaker transfer trolley, which comprise a bearing bottom plate, a supporting baffle movably mounted on the bearing bottom plate, and a mounting assembly arranged at the joint of the bearing bottom plate and the supporting baffle, according to the automatic circuit breaker transfer trolley, rapid installation of the supporting baffle on the bearing bottom plate is achieved through rapid clamping and locking between the plug pin piece and the clamping piece, rapid detachment of the supporting baffle on the bearing bottom plate is achieved through unlocking of the unlocking piece after clamping and locking of the plug pin piece and the clamping piece, and therefore the automatic circuit breaker transfer trolley is more convenient to store.

Description

Technical Field

[0001] The utility model relates to the technical field of inspection and maintenance of low-voltage distribution switch cabinets in power systems, in particular to a supporting mechanism and an automatic circuit breaker transport trolley. Background Art

[0002] The main function of the switchgear is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and power conversion in the power system. The components in the switchgear mainly include circuit breakers, disconnectors, load switches, operating mechanisms, transformers and various protective devices. There are many ways to classify switchgear. For example, according to the installation method of the circuit breaker, it can be divided into removable switchgear and fixed switchgear; or according to the different cabinet structures, it can be divided into open switchgear, metal-enclosed switchgear and metal-enclosed armored switchgear; according to the different voltage levels, it can be divided into high-voltage switchgear, medium-voltage switchgear and low-voltage switchgear. It is mainly suitable for various occasions such as power plants, substations, petrochemicals, metallurgical steel rolling, light industry and textiles, factories and mines, residential areas, high-rise buildings, etc.

[0003] During the inspection and maintenance of the switch cabinet, the circuit breaker needs to be transported out of the switch cabinet for inspection, maintenance, testing, etc. At present, a mechanical transfer cart is used in the power system to transport the circuit breaker. The mechanical transfer cart not only moves slowly, but also has difficulty in adjusting in the vertical and horizontal directions and poor adjustment accuracy, which increases the labor intensity and risk of injury of the staff, resulting in low work efficiency and high work risk. Therefore, we propose an automatic circuit breaker transfer cart. In the process of transporting circuit breakers by the traditional mechanical transfer cart, there is no supporting device to support the circuit breaker to prevent it from falling off, which poses a safety hazard. Therefore, we also propose a supporting mechanism.

[0004] In view of the above problems, we propose a supporting mechanism and an automatic circuit breaker transfer trolley. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In view of the problem that the traditional mechanical transfer trolley in the above or prior art has potential safety hazards due to the lack of a supporting device to prevent the circuit breaker from falling off, the present utility model is proposed.

[0007] Therefore, an object of the present invention is to provide a supporting mechanism.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions: including a load-bearing base plate, a support baffle movably mounted on the load-bearing base plate, and a mounting assembly arranged at the connection between the load-bearing base plate and the support baffle.

[0009] As a preferred solution of the support mechanism of the utility model, the installation assembly includes a latch member arranged at one end of the support baffle, a clamping member arranged in the load-bearing base plate and matching the latch member, and an unlocking member arranged at one end of the clamping member.

[0010] As a preferred solution of the support mechanism of the utility model, wherein: a mounting groove is provided on the load-bearing bottom plate, and the support baffle is movably installed in the mounting groove.

[0011] As a preferred solution of the support mechanism of the utility model, the latch member includes a latch member slot opened in the load-bearing base plate and communicated with the mounting slot, a special-shaped latch movably plugged into the latch member slot, an insertion slope arranged at one end of the special-shaped latch, and an insertion groove arranged on the special-shaped latch.

[0012] As a preferred solution of the support mechanism of the utility model, wherein: the clamping member includes a clamping member groove opened in the load-bearing base plate and communicated with the latch member groove, a special-shaped clamping pin elastically installed in the clamping member groove, an L-shaped clamping block arranged on the special-shaped clamping pin and matching the special-shaped latch pin, and a clamping inclined surface arranged at one end of the L-shaped clamping block.

[0013] As a preferred solution of the support mechanism of the utility model, wherein: the unlocking member includes an unlocking member groove opened in the load-bearing base plate and communicated with the clip groove, and an unlocking spring elastically installed in the unlocking member groove; one end of the unlocking spring is fixedly connected to the inner wall of the unlocking member groove, and the other end is fixedly connected to the special-shaped clip pin.

[0014] The beneficial effects of the support mechanism of the utility model: the utility model realizes rapid installation of the support baffle on the load-bearing base plate through the rapid clamping and locking between the latch member and the clamping member, and realizes rapid disassembly of the support baffle on the load-bearing base plate by unlocking the latch member and the clamping member after the clamping and locking, thereby making the automatic circuit breaker transfer trolley easier to store.

[0015] In actual use, the traditional mechanical transfer cart still has the problems of slow movement, difficulty in adjusting in the vertical and horizontal directions, and poor adjustment accuracy.

[0016] In order to solve the above technical problems, the utility model also provides the following technical solutions: an automatic circuit breaker transfer trolley, comprising a supporting mechanism, and also comprising an adjustment component fixedly connected to the load-bearing base plate; the adjustment component comprises a fine-tuning part arranged at the lower end of the load-bearing base plate, a locking part arranged at one end of the load-bearing base plate, and a movable lifting part arranged at the lower end of the fine-tuning part.

[0017] As a preferred solution of the automatic circuit breaker transfer trolley of the utility model, the fine-tuning part includes a linear guide slide slidably connected to the load-bearing base plate, an adjusting screw rod penetrating the load-bearing base plate and rotatably installed at one end on the side wall of the linear guide slide, and a rotating handwheel arranged at one end of the adjusting screw rod.

[0018] As a preferred solution of the automatic circuit breaker transfer trolley of the utility model, the locking member includes a clamping block arranged at one end of the load-bearing base plate, and a toggle rod arranged at the other end of the load-bearing base plate and fixedly connected to the clamping block.

[0019] As a preferred solution of the automatic circuit breaker transfer trolley of the utility model, the mobile lifting component includes a support base fixedly connected to the linear guide slide, a scissor-type lifting frame arranged at the lower end of the support base, an electric push rod arranged on the scissor-type lifting frame, a universal wheel arranged at the lower end of the scissor-type lifting frame, and a driving motor arranged on one side of the scissor-type lifting frame.

[0020] The beneficial effects of the automatic circuit breaker transfer trolley of the utility model: the utility model realizes the automatic walking function of the automatic circuit breaker transfer trolley by moving the lifting parts, further controls the lifting of the scissor-type lifting frame by driving the electric motor to control the electric push rod, realizes the height adjustment function of the automatic circuit breaker transfer trolley, realizes the horizontal position adjustment of the automatic circuit breaker transfer trolley by the fine-tuning parts, and realizes the locking between the automatic circuit breaker transfer trolley and the switch cabinet rail by the locking parts, thereby realizing the transfer and installation of the circuit breaker simply and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a schematic diagram of the overall cross-section of the support mechanism.

[0023] Figure 2 To support the organization Figure 1Enlarged schematic diagram at point A in the middle.

[0024] Figure 3 A schematic diagram of the local structure of the supporting mechanism.

[0025] Figure 4 It is a schematic diagram of the special-shaped latch structure of the supporting mechanism.

[0026] Figure 5 This is a schematic diagram of the overall structure of the automated circuit breaker transfer vehicle.

[0027] Figure 6 This is a schematic diagram of the partial structure of the automated circuit breaker transfer vehicle. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] Example 1

[0032] Reference Figures 1 to 4 , which is the first embodiment of the utility model, and this embodiment provides a support mechanism, including a load-bearing base plate 100, a support baffle 200 movably mounted on the load-bearing base plate 100, and an installation component 300 arranged at the connection between the load-bearing base plate 100 and the support baffle 200, the installation component 300 includes a latch member 301 arranged at one end of the support baffle 200, a clamping member 302 arranged in the load-bearing base plate 100 and matching with the latch member 301, and an unlocking member 303 arranged at one end of the clamping member 302, and a mounting groove 101 is opened on the load-bearing base plate 100, and the support baffle 200 is movably mounted in the mounting groove 101.

[0033] In this embodiment, the load-bearing base plate 100 is used to carry the circuit breaker that needs to be transported, and a mounting groove 101 is opened on the load-bearing base plate 100. There are two support baffles 200 that are movably installed in the mounting grooves 101 on the load-bearing base plate 100 through the mounting assembly 300. There are four groups of mounting assemblies 300 that are rectangularly arranged at the connection between the support baffle 200 and the load-bearing base plate 100. The latch member 301 is fixedly installed at the lower end of the support baffle 200 for quick plug-in installation of the support baffle 200. The clamping member 302 is movably installed in the load-bearing base plate 100 for plug-in locking of the latch member 301. The unlocking member 303 is arranged at one end of the clamping member 302 for limiting and resetting the clamping member 302.

[0034] Specifically, the latch member 301 includes a latch member slot 301a opened in the load-bearing base plate 100 and communicating with the installation slot 101, a special-shaped latch 301b movably plugged into the latch member slot 301a, an insertion slope 301c arranged at one end of the special-shaped latch 301b, and an insertion groove 301d arranged on the special-shaped latch 301b, and the clamping member 302 includes a clamping member slot 302a opened in the load-bearing base plate 100 and communicating with the latch member slot 301a, a special-shaped clamping pin 302b elastically installed in the clamping member slot 302a, an L-shaped clamping block 302c arranged on the special-shaped clamping pin 302b and matching the special-shaped latch 301b, and a clamping slope 302d arranged at one end of the L-shaped clamping block 302c.

[0035] In this embodiment, the latch slot 301a is opened in the load-bearing base plate 100 and communicates with the installation slot 101, and is used for the plug-in activity of the special-shaped latch 301b. An insertion slope 301c is provided at one end of the special-shaped latch 301b, which is used to cooperate with the clamping slope 302d at one end of the L-shaped clamping block 302c, so that the special-shaped latch 301b can be smoothly plugged into the latch slot 301a. The plug-in groove 301d matches the L-shaped clamping block 302c, and is used for the clamping of the L-shaped clamping block 302c, so that the special-shaped latch 301b is plugged into the latch slot 301a and is engaged with the special-shaped clamping pin 302b, thereby realizing the rapid installation of the support baffle 200 on the load-bearing base plate 100.

[0036] When in use, the support baffle 200 is placed in the installation groove 101, and the special-shaped latch 301b is inserted into the latch groove 301a. At this time, the insertion bevel 301c contacts the clamping bevel 302d, squeezing the clamping bevel 302d, so that the L-shaped clamping block 302c moves backward, and at the same time drives the special-shaped clamping pin 302b to move backward and squeeze the unlocking spring 303b. When the insertion bevel 301c passes the clamping bevel 302d, the special-shaped latch 301b contacts the special-shaped The locking pin 302b, at this time, the squeezing force of the plug-in slope 301c on the locking slope 302d disappears, so that the squeezing force on the unlocking spring 303b disappears, and the relaxation force of the unlocking spring 303b drives the special-shaped locking pin 302b to reset, and then the L-shaped locking block 302c is locked into the plug-in groove 301d, so that the special-shaped plug pin 301b can be quickly locked with the special-shaped locking pin 302b after being plugged in, and finally the support baffle 200 can be quickly installed.

[0037] Example 2

[0038] Reference Figures 1 to 4 , which is the second embodiment of the utility model. Different from the previous embodiment, this embodiment includes an unlocking member 303, which includes an unlocking member groove 303a opened in the load-bearing base plate 100 and communicated with the clip groove 302a, and an unlocking spring 303b elastically installed in the unlocking member groove 303a; one end of the unlocking spring 303b is fixedly connected to the inner wall of the unlocking member groove 303a, and the other end is fixedly connected to the special-shaped clip pin 302b.

[0039] In this embodiment, the unlocking member slot 303a is opened in the load-bearing base plate 100 and is connected to the card-connecting member slot 302a, which is used for the installation activity of the unlocking spring 303b. One end of the unlocking spring 303b is fixedly connected to the inner wall of the unlocking member slot 303a, and the other end is fixedly connected to the special-shaped card-connecting pin 302b, which is used for limiting the special-shaped card-connecting pin 302b and resetting the unlocking spring 303b after the special-shaped card-connecting pin 302b moves and squeezes the unlocking spring 303b. When it is necessary to release the card-connection lock between the special-shaped latch 301b and the special-shaped card-connecting pin 302b, press the special-shaped latch 301b to squeeze the unlocking spring 303b until the L-shaped card-connecting block 302c is separated from the plug-in groove 301d, so as to realize the rapid disassembly of the support baffle 200 on the load-bearing base plate 100.

[0040] The rest of the structure is the same as that of Example 1.

[0041] When in use, the special-shaped latch 301b is pressed to extend to one end outside the load-bearing base plate 100, so that the special-shaped latch 301b moves in the direction of squeezing the unlocking spring 303b, and at the same time drives the L-shaped snap-in block 302c to disengage from the plug-in groove 301d, thereby unlocking the snap-in lock between the special-shaped latch 301b and the special-shaped snap-in pin 302b, realizing the rapid disassembly of the support baffle 200, which is convenient for the storage of the transfer trolley device.

[0042] Example 3

[0043] Reference Figures 1 to 6 , which is the third embodiment of the utility model. Different from the previous embodiment, this embodiment provides an automated circuit breaker transfer trolley, including the supporting mechanism in the above embodiment, and also includes an adjustment component 400 fixedly connected to the load-bearing base plate 100; the adjustment component 400 includes a fine-tuning member 401 arranged at the lower end of the load-bearing base plate 100, a locking member 402 arranged at one end of the load-bearing base plate 100, and a movable lifting member 403 arranged at the lower end of the fine-tuning member 401.

[0044] In this embodiment, the adjustment component 400 is fixedly connected to the load-bearing base plate 100, and is used for moving and adjusting the position of the automatic circuit breaker transfer trolley. The fine-tuning component 401 is used for fine-tuning the load-bearing base plate 100 in the horizontal direction. When there is a slight deviation in the horizontal position of the automatic circuit breaker transfer trolley, the horizontal position of the load-bearing base plate 100 can be adjusted by the fine-tuning component 401, so that the load-bearing base plate 100 finally reaches the position required for work. The locking component 402 is used to lock the automatic circuit breaker transfer trolley with the high-voltage cabinet rail to prevent the automatic circuit breaker transfer trolley from being displaced during the process of moving the circuit breaker, thereby causing the circuit breaker to fall and cause a safety accident. The movable lifting component 403 is used for the walking and movement of the automatic circuit breaker transfer trolley and the height adjustment.

[0045] Specifically, the fine-tuning member 401 includes a linear guide rail slide 401a slidably connected to the load-bearing base plate 100, an adjusting screw rod 401b which is arranged in the load-bearing base plate 100 and one end of which is rotatably mounted on the side wall of the linear guide rail slide 401a, and a rotating hand wheel 401c arranged at one end of the adjusting screw rod 401b. The locking member 402 includes a clamping block 402a arranged at one end of the load-bearing base plate 100, and a clamping block 402a arranged at the other end of the load-bearing base plate 100 and connected to the clamping block 402c. The connecting block 402a is fixedly connected to the toggle rod 402b, and the movable lifting component 403 includes a supporting base 403a fixedly connected to the linear guide slide 401a, a scissor-type lifting frame 403b arranged at the lower end of the supporting base 403a, an electric push rod 403c arranged on the scissor-type lifting frame 403b, a universal wheel 403d arranged at the lower end of the scissor-type lifting frame 403b, and a driving motor 403e arranged at one side of the scissor-type lifting frame 403b.

[0046] In this embodiment, the load-bearing base plate 100 is slidably mounted on the linear guide slide 401a, the adjusting screw rod 401b is set through the load-bearing base plate 100, and is threadedly sleeved with the load-bearing base plate 100, one end of the adjusting screw rod 401b is rotatably mounted on the side wall of the linear guide slide 401a, and the other end is set through the side wall of the linear guide slide 401a, and extends to the outside of the side wall of the linear guide slide 401a. One end is fixedly mounted with a rotating hand wheel 401c, which is used for fine adjustment of the horizontal position of the load-bearing base plate 100, and the load-bearing base plate 100 is docked with the high-voltage cabinet rail. A clamping block 402a is provided at one end, and a toggle rod 402b is provided at the other end, and the toggle rod 402b is fixedly connected to the clamping block 402a, the support seat 403a is used to connect the scissor-type lifting frame 403b and the linear guide slide 401a, the scissor-type lifting frame 403b is used to adjust the height of the automatic circuit breaker transfer trolley, the electric push rod 403c is used to promote the lifting of the scissor-type lifting frame 403b, and the driving motor 403e drives the universal wheel 403d through the transmission mechanism, thereby realizing the automatic walking function of the automatic circuit breaker transfer trolley.

[0047] The rest of the structure is the same as that of Example 2.

[0048] When in use, turn on the switch of the electric push rod 403c to adjust the height of the automatic circuit breaker transfer trolley. The movement of the automatic circuit breaker transfer trolley adopts the principle of a remote control flatbed car. The remote control is used to control the movement of the automatic circuit breaker transfer trolley, so as to transfer the circuit breaker to the required working position. After arriving at the working position, the load-bearing base plate 100 is provided with a clamping block 402a at one end thereof. A laser emitter S is also provided for emitting a laser to align with the high-voltage cabinet rail. When the position is offset, the rotating hand wheel 401c can be rotated to drive the adjusting screw rod 401b to rotate, so as to adjust the horizontal position of the load-bearing base plate 100 so that it can be smoothly docked with the switch cabinet rail. The toggle rod 402b is toggled so that the clamping block 402a is clamped onto the high-voltage cabinet rail, thereby realizing the locking between the automatic circuit breaker transfer trolley and the high-voltage cabinet rail, and finally realizing the smooth transportation and installation of the circuit breaker.

[0049] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0050] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0051] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A supporting mechanism, characterized in that: It comprises a load-bearing base plate (100), a supporting baffle plate (200) movably mounted on the load-bearing base plate (100), and a mounting assembly (300) arranged at the connection between the load-bearing base plate (100) and the supporting baffle plate (200); The load-bearing bottom plate (100) is provided with a mounting groove (101), and the supporting baffle (200) is movably mounted in the mounting groove (101); The installation assembly (300) comprises a latch member (301) arranged at one end of the support baffle (200), a clamping member (302) arranged in the load-bearing base plate (100) and matching the latch member (301), and an unlocking member (303) arranged at one end of the clamping member (302); The latch member (301) comprises a latch member slot (301a) provided in the load-bearing base plate (100) and communicating with the mounting slot (101), a special-shaped latch pin (301b) movably plugged into the latch member slot (301a), an insertion inclined surface (301c) provided at one end of the special-shaped latch pin (301b), and an insertion groove (301d) provided on the special-shaped latch pin (301b); The clamping member (302) comprises a clamping member slot (302a) provided in the load-bearing bottom plate (100) and communicating with the latch member slot (301a), a special-shaped clamping pin (302b) elastically mounted in the clamping member slot (302a), an L-shaped clamping block (302c) arranged on the special-shaped clamping pin (302b) and matching with the special-shaped latch pin (301b), and a clamping inclined surface (302d) arranged at one end of the L-shaped clamping block (302c); The unlocking member (303) comprises an unlocking member slot (303a) opened in the load-bearing bottom plate (100) and communicating with the clamping member slot (302a), and an unlocking spring (303b) elastically mounted in the unlocking member slot (303a); One end of the unlocking spring (303b) is fixedly connected to the inner wall of the unlocking member slot (303a), and the other end is fixedly connected to the special-shaped latching pin (302b).

2. An automated circuit breaker transfer vehicle, characterized in that: It comprises the support mechanism according to claim 1, and further comprises an adjustment assembly (400) fixedly connected to the load-bearing base plate (100); The adjustment component (400) comprises a fine-tuning member (401) arranged at the lower end of the load-bearing base plate (100), a locking member (402) arranged at one end of the load-bearing base plate (100), and a movable lifting member (403) arranged at the lower end of the fine-tuning member (401).

3. The automatic circuit breaker transport vehicle according to claim 2, characterized in that: The fine-tuning component (401) comprises a linear guide rail slide (401a) slidably connected to the load-bearing base plate (100), an adjusting screw rod (401b) penetrating the load-bearing base plate (100) and having one end rotatably mounted on a side wall of the linear guide rail slide (401a), and a rotating hand wheel (401c) arranged at one end of the adjusting screw rod (401b).

4. The automatic circuit breaker transport vehicle according to claim 3, characterized in that: The locking member (402) comprises a clamping block (402a) arranged at one end of the load-bearing base plate (100), and a toggle rod (402b) arranged at the other end of the load-bearing base plate (100) and fixedly connected to the clamping block (402a).

5. The automatic circuit breaker transport vehicle according to claim 3 or 4, characterized in that: The mobile lifting member (403) comprises a support seat (403a) fixedly connected to the linear guide rail slide (401a), a scissor-type lifting frame (403b) arranged at the lower end of the support seat (403a), an electric push rod (403c) arranged on the scissor-type lifting frame (403b), a universal wheel (403d) arranged at the lower end of the scissor-type lifting frame (403b), and a driving motor (403e) arranged at one side of the scissor-type lifting frame (403b).

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