Component transfer device
By designing a component transfer device with movable pallets and limiting components, the problem of fixed position of the transfer trolley was solved, achieving efficient and stable component transfer, reducing manual back-and-forth movement, and improving work efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN FAW TOYOTA MOTOR CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-06-12
AI Technical Summary
The existing transfer carts have fixed transport positions, which requires staff to walk back and forth between the transfer carts and the next workstation, affecting work efficiency.
Design a component transfer device, including a trolley, a pallet, and a limiting component. The pallet can move on the trolley, and the limiting component holds the component to be transferred. The operator can directly move the component on the pallet to the next work station, reducing back-and-forth movement.
It improves work efficiency, avoids damage to components caused by friction during transportation, and enables synchronous transportation and stable support of multiple components.
Smart Images
Figure CN224349699U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of component transfer technology, and in particular to a component transfer device. Background Technology
[0002] Transfer equipment is a commonly used tool in factories for transferring workpieces or materials. During the production process, workpieces or materials are moved point-to-point over short distances through transfer equipment.
[0003] In related technologies, transfer equipment includes transfer trolleys. The top of the transfer trolley is used to place workpieces, and the workpieces are transferred from one workstation to another via the transfer trolley, where workers then perform further operations on the workpieces. However, because the transport position of the transfer trolley is fixed, workers need to walk back and forth between the transfer trolley and the next workstation when operating on the workpieces on the transfer trolley, which affects work efficiency. Utility Model Content
[0004] The purpose of this application is to provide a component transfer device, which aims to solve the technical problem that the current transfer trolley has a fixed transport position, and the staff needs to walk back and forth between the transfer trolley and the next work station, which affects work efficiency.
[0005] This application provides a component transfer device, which includes:
[0006] A trolley, which is capable of moving between a first workstation and a second workstation;
[0007] A tray and a limiting member, the tray being disposed on the trolley and movable relative to the trolley in a first direction to extend out of or retract into the trolley, the tray being used to support the component to be transferred; the limiting member being connected to the tray and the component to be transferred for holding the component to be transferred on the tray.
[0008] In the above solution, based on the component transfer device provided in the application, the component to be transferred is placed on a pallet, and the component to be transferred can be held on the pallet by a limiting component. The pallet machine and the component to be transferred are moved from the first workstation to the second workstation by a trolley. At the second workstation, the operator can pull out the pallet so that the pallet extends out of the trolley, reducing the distance between the component to be transferred and the next workstation. The operator can directly move the component to be transferred on the pallet to the next workstation without repeatedly moving between the trolley and the next workstation, thus increasing work efficiency.
[0009] Optionally, the pallet includes a support plate that slides with the trolley along the first direction; the limiting member includes a first clamping block disposed on the top of the support plate, the first clamping block being used to support the bottom of the component to be transferred.
[0010] In the above solution, the first clamp can support the bottom of the component to be transferred, avoiding hard contact between the component to be transferred and the pallet, thereby preventing damage to the component to be transferred caused by friction between the pallet and the component to be transferred during the movement.
[0011] Optionally, the pallet further includes a support frame, which is disposed on one side of the support plate along a second direction, the first direction being perpendicular to the second direction; the limiting member further includes a second clamping block disposed on the support frame, the second clamping block being used to support the side of the component to be transferred.
[0012] In the above solution, the second clamp can support the side of the component to be transferred, and the first clamp can support the bottom of the component to be transferred. Thus, the cooperation of the first and second clamps can achieve the effect of stably supporting the component to be transferred and prevent the component to be transferred from shaking during the transfer process.
[0013] Optionally, there are multiple limiting members, and the multiple limiting members are spaced apart along the first direction.
[0014] In the above scheme, multiple parts to be transferred can be placed on the pallet, and each part to be transferred is limited by a limiting component, so as to realize the synchronous transfer of multiple parts to be transferred and increase the transfer efficiency.
[0015] Optionally, the top of the trolley is provided with a first guide assembly, and the tray slides with the trolley along the first direction through the first guide assembly.
[0016] In the above scheme, the first guide component can guide the movement of the pallet, enabling the pallet to move along the first direction, so that the trolley can support the pallet in the designated position, and at the same time, increase the smoothness of the pallet movement.
[0017] Optionally, the trolley is provided with a limiting block on its top, which is used to limit the movement range of the pallet.
[0018] In the above solution, by setting limit blocks, the movement range of the pallet is restricted, preventing the pallet from falling off the trolley and increasing the safety of the component transfer device.
[0019] Optionally, the component transfer device further includes a support platform, which is positioned opposite the pallet along the first direction when the trolley moves to the second work station, so as to support the bottom of the pallet in the portion extending out of the trolley.
[0020] In the above scheme, when the trolley moves the pallet to the second work station, the pallet is pulled out so that it extends out of the end of the trolley. The bottom of the extended end of the pallet is supported by the support platform to provide stable support for the support platform.
[0021] Optionally, the top of the support platform is provided with a second guide component, and the tray slides with the support platform along the first direction through the second guide component.
[0022] In the above scheme, when the pallet is supported by the top of the support platform, the second guide component can guide the movement of the pallet and increase the smoothness of the pallet movement.
[0023] Optionally, the support platform is provided with a locking element for connecting with the tray to prevent the tray from moving on the support platform.
[0024] In the above solution, once the pallet is moved to the top of the support platform and into place, the pallet can be locked in place by locking components to prevent it from shaking when transporting parts to be transferred, thus increasing the stability of the device.
[0025] Optionally, the component transfer device further includes a moving component disposed at the bottom of the trolley, the trolley being movable via the moving component.
[0026] In the above scheme, the trolley can move through the moving components, increasing the smoothness of the trolley's movement. Attached Figure Description
[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0028] Figure 1 This is a schematic diagram of the structure of a trolley provided in an embodiment of this application;
[0029] Figure 2 A schematic diagram of the structure of a tray provided in an embodiment of this application;
[0030] Figure 3 This is a schematic diagram of a support platform provided in an embodiment of this application.
[0031] Figure label:
[0032] 1. Trolley; 11. First guide assembly; 111. First side plate; 112. First guide roller group; 12. Limiting block; 13. First end plate; 2. Pallet; 21. Support plate; 22. Support frame; 3. Limiting component; 31. First clamping block; 32. Second clamping block; 4. Support platform; 41. Second guide assembly; 411. Second side plate; 412. Second guide roller group; 42. Second end plate. Detailed Implementation
[0033] In the embodiments of this application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.
[0034] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0035] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.
[0036] In the embodiments of this application, "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, said acceptable deviation range being determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range for approximate parallelism may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range for approximate perpendicularity may also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.
[0037] Combination Figure 1 and Figure 2 As shown, this application embodiment provides a component transfer device, which includes a trolley 1, a tray 2, and a limiting member 3. Figure 1Car 1 was indicated. Figure 2 The diagram shows tray 2, which is positioned along... Figure 1 and Figure 2 The X-axis direction is placed on the trolley 1. The trolley 1 can move between the first and second workstations. The pallet 2 is mounted on the trolley 1 and can move relative to the trolley 1 along a first direction to extend out of or retract into the trolley 1. Specifically, the pallet can extend one end of the trolley 1 along the first direction or retract into the trolley 1. The pallet 2 is used to support the parts to be transferred. The first direction is... Figure 1 and Figure 2 In the X-axis direction. At the first station, trolley 1 supports pallet 2, and the part to be transferred is placed on pallet 2. Trolley 1 moves the part to be transferred from the first station to the second station. At the second station, trolley 1 is positioned opposite the next station (the third station). The distance between pallet 2 and the third station can be reduced by pulling pallet 2, making it easier for workers to move the part to be transferred from pallet 2 to the third station. Limiting member 3 is connected to pallet 2 and the part to be transferred to keep the part to be transferred on pallet 2. The part to be transferred can be supported on pallet 2 by limiting member 3, or the part to be transferred can be supported on pallet 2 and then kept in position by limiting member 3. These are not restrictive. The part to be transferred can be connected to pallet 2 by limiting member 3, thereby increasing the stability of the part to be transferred on pallet 2, avoiding shaking of the part to be transferred during movement, and preventing damage caused by collisions between adjacent parts. At the same time, it prevents the part to be transferred from falling off pallet 2, thus achieving stable transfer of the part to be transferred.
[0038] Based on the component transfer device provided in the application, the component to be transferred is placed on the pallet 2, and the component to be transferred can be held on the pallet 2 by the limiting member 3. The pallet 2 machine and the component to be transferred are moved from the first station to the second station by the trolley 1. At the second station, the operator can pull out the pallet 2 so that the pallet 2 extends out of the trolley 1, reducing the distance between the component to be transferred and the next station (the third station). The operator can directly move the component to be transferred on the pallet 2 to the next station (the third station) without repeatedly moving between the trolley 1 and the next station (the third station), thus increasing work efficiency.
[0039] In some implementations, such as Figure 2 As shown, the pallet 2 includes a support plate 21, the plane of which is parallel to the horizontal plane. The support plate 21 and the trolley 1 slide in a first direction, i.e., along... Figure 1 and Figure 2The component slides along the X-axis. The limiting member 3 includes a first clamping block 31 disposed on the top of the support plate 21, which supports the bottom of the component to be transferred. The top of the first clamping block 31 has a first clamping groove, the shape of which matches the bottom of the component to be transferred. For example, the first clamping groove is V-shaped, in which case the bottom of the component to be transferred can be linear, or the bottom of the component to be transferred can be V-shaped, ensuring that the first clamping block 31 can provide stable support for the bottom of the component to be transferred.
[0040] In this design, the first clamping block 31 can support the bottom of the component to be transferred, avoiding hard contact between the component to be transferred and the pallet 2, thereby preventing damage to the component to be transferred caused by friction between the pallet 2 and the component to be transferred during the movement.
[0041] In some implementations, reference continues. Figure 2 The pallet 2 also includes a support frame 22, which has a rectangular frame structure and is positioned perpendicular to the horizontal plane. The support frame 22 is arranged along a second direction on one side of the support plate 21, with the first direction perpendicular to the second direction. Figure 2 The limiting member 3 also includes a second clamping block 32 disposed on the support frame 22, the second clamping block 32 being used to support the side of the component to be transferred. The second clamping block 32 is located along the Y-axis direction. Figure 2 A second clamping groove is provided on one side of the component in the Y-axis direction, and the side of the component to be transferred matches the shape of the second clamping groove. For example, the second clamping groove is V-shaped, in which case the side of the component to be transferred can be linear, or the side of the component to be transferred can be V-shaped, to ensure that the second clamping block 32 can provide stable support for the side of the component to be transferred.
[0042] In this design, the second clamping block 32 can support the side of the component to be transferred, and the first clamping block 31 can support the bottom of the component to be transferred. Thus, through the cooperation of the first clamping block 31 and the second clamping block 32, the component to be transferred can be stably supported, preventing the component to be transferred from shaking during the transfer process.
[0043] In some embodiments, there are multiple limiting members 3, which are spaced apart along the first direction. Correspondingly, there are also multiple components to be transferred, and each component to be transferred corresponds to one limiting member 3, so that one component to be transferred is limited by one limiting member 3.
[0044] In this design, multiple parts to be transferred can be placed on the pallet 2. Each part to be transferred is limited by a limiting member 3, so as to realize the synchronous transfer of multiple parts to be transferred and increase the transfer efficiency.
[0045] In some embodiments, each limiting member 3 includes two first clamping blocks 31, which are spaced apart along a second direction to support the bottom of the component to be transferred at different positions, thereby further increasing the stability of the support.
[0046] In some embodiments, the contact surfaces of the first clamping block 31 and the second clamping block 32 with the component to be transferred are provided with an elastic layer, which may be a rubber layer, so as to achieve flexible contact between the first clamping block 31, the second clamping block 32 and the component to be transferred, and avoid damage to the component to be transferred.
[0047] The above embodiments illustrate the case where the component to be transferred is supported on the pallet 2 by the limiting member 3. The following describes an embodiment in which the component to be transferred is supported on the pallet 2 and the position of the component to be transferred is maintained by the limiting member 3.
[0048] In some embodiments, the pallet 2 includes a support plate 21 and a support frame 22. The plane of the support plate 21 is parallel to the horizontal plane, and the support plate 21 slides with the trolley 1 along a first direction. The support frame 22 has a rectangular frame structure, and the plane of the support frame 22 is perpendicular to the horizontal plane. The support frame 22 is arranged on one side of the support plate 21 along a second direction. The limiting member 3 includes two third clamping blocks arranged on the support plate 21 and two fourth clamping blocks arranged on the support frame 22. The two third clamping blocks are spaced apart along the first direction. After the component to be transferred is placed on top of the support plate 21, the two third clamping blocks support the bottom sides of the component to be transferred. The two fourth clamping blocks are spaced apart along the first direction. After the component to be transferred is placed on top of the support plate 21, the two fourth clamping blocks support the sides of the component to be transferred.
[0049] It is evident that the design of the limiting component 3 is unrestricted and can be selected according to actual needs.
[0050] In some implementations, such as Figure 1 As shown, the top of the trolley 1 is provided with a first guide assembly 11, and the tray 2 slides and engages with the trolley 1 along a first direction through the first guide assembly 11.
[0051] In this design, the first guide component 11 can guide the movement of the pallet 2, enabling the pallet 2 to move along the first direction, so that the trolley 1 can support the pallet 2 in the designated position, and at the same time, increase the smoothness of the movement of the pallet 2.
[0052] In some implementations, reference continues. Figure 1The first guide assembly 11 includes two first side plates 111 disposed on the trolley 1. The two first side plates 111 are disposed opposite each other on both sides of the trolley 1 along the second direction. The size between the two first side plates 111 matches the size of the pallet 2 along the second direction, so as to guide the movement of the pallet 2 through the two first side plates 111.
[0053] In some implementations, reference continues. Figure 1 The first guide assembly 11 further includes two first guide roller groups 112 disposed on the trolley 1. The two first guide roller groups 112 are disposed at intervals on the top of the trolley 1 along a second direction. Each first guide roller group 112 includes multiple first guide rollers, which are arranged sequentially along a first direction, and the axes of the multiple first guide rollers are parallel to each other and extend along a horizontal direction.
[0054] In this design, the pallet 2 achieves sliding contact with the first guide roller, thereby increasing the smoothness of the pallet 2's movement on the trolley 1.
[0055] In some implementations, reference continues. Figure 1 The trolley 1 has a first end plate 13 at one end along the first direction, and the other end of the trolley 1 is open, allowing the tray 2 to extend out through the open end of the trolley 1.
[0056] In some implementations, such as Figure 1 As shown, a limiting block 12 is provided on the top of the trolley 1 to restrict the movement range of the pallet 2. The limiting block 12 is located at the open end of the trolley 1, and the bottom end of the pallet 2 has a sliding groove extending along a first direction. The sliding groove and the limiting block 12 are slidably engaged, allowing the pallet 2 to move along the first direction. When the pallet 2 extends beyond the trolley 1 and moves to its maximum distance, the limiting block 12 contacts the end wall of the sliding groove to prevent the pallet 2 from detaching from the trolley 1. When the pallet 2 retracts to the top of the trolley 1, the movement range of the pallet 2 can be restricted by the first end plate 13 of the trolley 1.
[0057] In this design, by setting a limit block 12, the movement range of the pallet 2 is limited, preventing the pallet 2 from falling off the trolley 1 and increasing the safety of the component transfer device.
[0058] In some implementations, combined Figure 2 and Figure 3 As shown, the component transfer device also includes a support platform 4 ( Figure 3 The diagram shows support platform 4, but does not show the relationship between support platform 4 and support platform 4. Figure 1(Regarding the relative positions of the trolley 1 and the pallet 2), when the trolley 1 moves to the second station, the support platform 4 and the pallet 2 are positioned opposite each other along the first direction, so that the bottom of the pallet 2 extending out of the trolley 1 can be supported. That is, when the trolley 1 moves the pallet 2 to the second station, the extended end of the pallet 2 is supported by the support platform 4.
[0059] In this design, when the trolley 1 moves the pallet 2 to the second work station, the pallet 2 is pulled out so that it extends out of the end of the trolley 1. The bottom of the extended end of the pallet 2 is supported by the support platform 4 to provide stable support for the support platform 4.
[0060] In some implementations, such as Figure 3 As shown, the top of the support platform 4 is provided with a second guide component 41, and the tray 2 slides and engages with the support platform 4 along the first direction through the second guide component 41.
[0061] In this design, when the tray 2 is supported by the top of the support platform 4, the second guide component 41 can guide the movement of the tray 2 and increase the smoothness of the movement of the tray 2.
[0062] In some implementations, reference continues. Figure 3 The second guide assembly 41 includes two second side plates 411 disposed on the support platform 4. The two second side plates 411 are disposed opposite each other on both sides of the support platform 4 along the second direction. The size between the two second side plates 411 matches the size of the pallet 2 along the second direction, so as to guide the movement of the pallet 2 through the two second side plates 411.
[0063] In some implementations, reference continues. Figure 3 The second guide assembly 41 further includes two second guide roller groups 412 disposed on the support platform 4. The two second guide roller groups 412 are disposed at intervals along the second direction on the top of the support platform 4. Each second guide roller group 412 includes multiple second guide rollers, which are arranged sequentially along the first direction, and the axes of the multiple second guide rollers are parallel to each other and extend along the horizontal direction.
[0064] In this design, the tray 2 achieves sliding contact with the second guide roller, thereby increasing the smoothness of the tray 2's movement on the support platform 4.
[0065] In some implementations, reference continues. Figure 3 The support platform 4 has a second end plate 42 at one end along the first direction, and the other end along the first direction of the support platform 4 is open, so that the tray 2 can be inserted into the support platform 4 through the open end of the support platform 4.
[0066] In some embodiments, the support platform 4 is provided with a locking element for connecting to the tray 2 to prevent the tray 2 from moving on the support platform 4.
[0067] In this design, when the pallet 2 moves to the top of the support platform 4 and is in place, the pallet 2 can be locked in place on the support platform 4 by locking components, thus preventing the pallet 2 from shaking when transporting the parts to be transferred and increasing the stability of the device.
[0068] In some embodiments, the locking element includes a locking rod and a rotating arm. The locking rod is rotatably mounted on one end of one of the second side plates 411 near the second end plate 42, and the rotating arm is used to drive the locking rod to rotate. The support frame 22 adopts a frame structure, including two first arms arranged opposite each other along a first direction, the extension direction of the first arms being perpendicular to the horizontal plane, and second arms respectively connecting the corresponding ends of the two first arms, the extension direction of the second arms being parallel to the horizontal plane. When the end of the tray 2 contacts the second end plate 42, one of the first arms contacts the second end plate 42. By rotating the rotating arm, the locking rod can be rotated, so that the locking rod is blocked on the side of the first arm opposite to the second end plate 42, thereby locking the tray 2, which is convenient to operate.
[0069] In some embodiments, the support platform 4 is provided with a clearance in the middle, so that the support platform 4 is divided into two platforms. The two platforms are arranged at intervals along the second direction. The support platform 4 with the split arrangement can make way for the movement of staff and the planning of other equipment, making the structure more reasonable.
[0070] In some embodiments, the component transfer device further includes a moving component disposed at the bottom of the trolley 1, which enables the trolley 1 to move.
[0071] With this design, the trolley 1 can move through the moving components, increasing the smoothness of the trolley 1's movement.
[0072] In some embodiments, the moving component includes casters located at the bottom of the trolley 1. The operator can move the trolley 1 from the first workstation to the second workstation by pushing it. In the second workstation, the position of the trolley 1 can be maintained by locking the casters, making operation convenient.
[0073] In other embodiments, the moving component includes a mobile robot detachably mounted at the bottom of the trolley 1. The mobile robot can lift the trolley 1 and move it along a preset path from the first workstation to the second workstation. At the second workstation, the mobile robot lowers the trolley 1 to achieve automatic driving of the trolley 1.
[0074] It is evident that the design of the mobile component in this application is not limited and can be designed according to actual needs.
[0075] In some embodiments, the component to be transferred is a vehicle door. In this case, the first clamping block 31 is supported at the bottom of the vehicle door, and the second clamping block 32 is supported at the side of the vehicle door. It is understood that the component to be transferred can also be other components. In this case, the shapes of the first clamping block 31 and the second clamping block 32 can be adapted, and these modifications do not limit the movement.
[0076] In the description of the embodiments of this application, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.
[0077] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A component transfer device, characterized in that, include: A trolley (1) is movable between a first workstation and a second workstation; A tray (2) and a limiting member (3) are provided. The tray (2) is disposed on the trolley (1) and is movable relative to the trolley (1) in a first direction to extend out of or retract into the trolley (1). The tray (2) is used to support the component to be transferred. The limiting member (3) is connected to the tray (2) and the component to be transferred and is used to hold the component to be transferred on the tray (2).
2. The component transfer device according to claim 1, characterized in that, The pallet (2) includes a support plate (21), which slides with the trolley (1) along the first direction; the limiting member (3) includes a first clamping block (31) disposed on the top of the support plate (21), which is used to support the bottom of the component to be transferred.
3. The component transfer device according to claim 2, characterized in that, The pallet (2) also includes a support frame (22), which is disposed on one side of the support plate (21) along a second direction, the first direction being perpendicular to the second direction; the limiting member (3) also includes a second clamping block (32) disposed on the support frame (22), the second clamping block (32) being used to support the side of the component to be transferred.
4. The component transfer device according to claim 1, characterized in that, There are multiple limiting members (3), and the multiple limiting members (3) are spaced apart along the first direction.
5. The component transfer device according to claim 1, characterized in that, The top of the trolley (1) is provided with a first guide assembly (11), and the tray (2) slides with the trolley (1) along the first direction through the first guide assembly (11).
6. The component transfer device according to claim 1, characterized in that, The trolley (1) is provided with a limiting block (12) on its top, which is used to limit the movement range of the tray (2).
7. The component transfer device according to any one of claims 1 to 6, characterized in that, The component transfer device also includes a support platform (4). When the trolley (1) moves to the second work station, the support platform (4) is positioned opposite the pallet (2) along the first direction so as to be able to support the bottom of the portion of the pallet (2) extending out of the trolley (1).
8. The component transfer device according to claim 7, characterized in that, The top of the support platform (4) is provided with a second guide component (41), and the tray (2) slides along the first direction with the support platform (4) through the second guide component (41).
9. The component transfer device according to claim 7, characterized in that, The support platform (4) is provided with a locking element, which is used to connect with the tray (2) to prevent the tray (2) from moving on the support platform (4).
10. The component transfer device according to any one of claims 1 to 6, characterized in that, The component transfer device further includes a moving component, which is disposed at the bottom of the trolley (1), and the trolley (1) can be moved by the moving component.