Parallel rigid chain and lifting mechanism

Abstract

The utility model provides a parallel type rigid chain and a lifting mechanism, each chain main body of the parallel type rigid chain comprises a plurality of sections of chains, and each chain comprises a first chain link, a second chain link, a first chain plate and a second chain plate, the upper edges of the first chain link, the second chain link, the first chain plate and the second chain plate are symmetrically provided with same round corners, the first chain link and the second chain link are provided with a first through hole, a second through hole, a first pin shaft, a second pin shaft and a third pin shaft, and the first chain plate and the second chain plate are provided with a third through hole, a fourth through hole and a third pin shaft; the first chain link is movably connected with the third through hole in the first chain plate through the second through hole in the first chain link and the second pin shaft in the first chain link, and the second chain link is movably connected with the fourth through hole in the first chain plate through the first through hole in the second chain link and the first pin shaft in the fourth through hole in the first chain plate. According to the parallel type rigid chain, the lifting stroke and the bearing capacity can be improved, the height is low after the chain is folded, and transportation and storage are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of rigid chain technology, and in particular to a parallel rigid chain. This utility model also relates to a lifting mechanism incorporating the aforementioned parallel rigid chain. Background Technology

[0002] A lifting mechanism is a type of crane that can vertically transport objects. It also refers to devices used for vertical conveying in logistics systems such as factories and automated warehouses, such as scissor lifts, screw lifts, overhead cranes, and gantry cranes.

[0003] Currently, there are many lifting methods available for lifting mechanisms, such as hydraulic lifts, large spiral lifts, and heavy-duty electric cylinders. These are all mature and reliable technologies with wide applications. However, in many application scenarios, to ensure the safety of products and equipment, the lifting height of the lifting mechanism is small, resulting in a limited lifting stroke. Secondly, when at the zero position, the overall height of the lifting equipment is relatively high, requiring a large amount of space, which makes transportation and storage inconvenient. Utility Model Content

[0004] In view of this, the present invention aims to propose a parallel rigid chain to facilitate lifting and lowering of the device when it is at zero position, thereby facilitating transportation and storage.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A parallel rigid chain includes at least two chain bodies arranged at a distance along a second preset direction, each chain body including multiple chain sections connected in sequence;

[0007] Each chain includes a first link and a second link connected in sequence. The first link has a first chain plate on each side in the width direction, and the second link has a second chain plate on each side in the width direction. Each first chain plate is used to connect the first link and the second link, and each second chain plate is used to connect two adjacent chains. The upper edges of the first link, the second link, the first chain plate, and the second chain plate are symmetrically provided with the same rounded corners.

[0008] The upper half of the first link and the second link are provided with a first through hole and a second through hole arranged at a distance along a first preset direction. The upper half of the first chain plate and the second chain plate are provided with a third through hole and a fourth through hole arranged at a distance along a first preset direction. The first link and the second link are provided with a first pin coaxial with the third through hole and a second pin coaxial with the fourth through hole. The first link, the second link, the first chain plate and the second chain plate are provided with a third pin arranged extending along a second preset direction. Each of the third pins is used to receive external drive.

[0009] The first link is movably connected to the second link via the second through hole on it and the third through hole on the first link plate via the second pin on it, and the second link is movably connected to the second link via the first through hole on it and the fourth through hole on the first link plate via the first pin on it.

[0010] Furthermore, it also includes a third link connected to the chain located at the first end, the third link being used to connect to the support platform, and the third link being the same as the first link or the second link; the third link is provided with third chain plates on both sides in the width direction of the third link, and each third chain plate is used to connect the third link and the adjacent first link.

[0011] Furthermore, the third link and the third link plate are each provided with the third pin, and the third pins are arranged at intervals along a first preset direction.

[0012] Furthermore, in the first preset direction, the lower half of the first link, the second link, the first chain plate, and the second chain plate are respectively provided with a first semicircular hole and a second semicircular hole on both sides. The first semicircular holes and the second semicircular holes are symmetrically arranged, and a fifth through hole is provided at the midpoint of the line connecting the centers of the first semicircular holes and the second semicircular holes. Each of the fifth through holes is coaxially arranged with the corresponding third pin; and / or,

[0013] The lower half of the third link and the third link plate, and the side closest to the first link, are provided with a third semi-circular hole.

[0014] Furthermore, each of the third chain plates includes a fourth chain plate and a fifth chain plate, and each of the fifth chain plates is provided with a sixth through hole coaxially disposed with the first pin on the third chain link; the fourth chain plate is the same as the first chain plate or the second chain plate.

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] The parallel rigid chain of this utility model, through the first and second through holes on the first and second chain links, the third and fourth through holes on the first and second chain plates, and the first and second pins, enables movable connections between the first chain link and the first chain plate, and between the second chain link and the first chain plate. This facilitates the extension or retraction of the chain, improves the lifting stroke, and when the chain is extended, the chain links fit tightly together, which improves the load-bearing capacity. At the same time, when the chain is retracted, the overall height of the device is low, which is conducive to transportation and storage.

[0017] Secondly, the third chain plate enhances the lateral bending resistance of the third chain link, thereby strengthening the structural strength of the chain at its lowest point and ensuring the stability of the device. It also strengthens the connection between the third chain link and the adjacent first chain link. The placement of third pins and their spacing facilitates the reception of external drives, thus enabling the chain to extend or retract.

[0018] Furthermore, the first and second semicircular holes on the first and second chain links allow for locking of the first and second chain links by engaging with the third pin on the first chain plate. This restricts the rotation of the first and second chain links, thereby enhancing the load-bearing capacity of the parallel rigid chain. The third chain plate, composed of the fourth and fifth chain plates, ensures the structural strength of the third chain link and features a simple structure that is easy to design and implement.

[0019] In addition, another objective of this utility model is to provide a lifting mechanism, including a housing, a guide groove provided in the housing, and a drive wheel assembly rotatably provided on the housing, and also including the parallel rigid chain as described above.

[0020] Furthermore, the drive wheel assembly includes two sprockets arranged at a distance along a second preset direction on both sides of each chain body, and the two ends of each third pin shaft are respectively engaged with the corresponding two sprockets.

[0021] Furthermore, the housing is provided with a drive shaft extending along a second preset direction, and each of the sprockets is sleeved on the drive shaft.

[0022] Furthermore, each of the chain bodies slides in the guide groove via the first pin and the second pin thereon; each of the chain bodies is provided with two guide grooves on both sides along the second preset direction, and each guide groove includes a vertical section, a 1 / 4 arc section, a first horizontal section, a 1 / 2 arc section and a second horizontal section connected in sequence, and the drive shaft is located at the connection between the vertical section and the 1 / 4 arc section.

[0023] The lifting mechanism described in this utility model, by adopting the above-mentioned parallel rigid chain, can lift the carrying platform after the parallel rigid chain is extended, with strong load-bearing capacity. After the parallel rigid chain is retracted, the overall height of the device is low, which is conducive to transportation and storage.

[0024] Furthermore, the use of two sprockets ensures reliable transmission of the parallel rigid chain, thereby guaranteeing its stable movement. By incorporating a drive shaft, the sprockets can be driven through a simple structure, enabling the extension or retraction of the parallel rigid chain.

[0025] Furthermore, by setting the guide groove, each first pin and second pin slides on the guide groove, which can guide the parallel rigid chain and effectively prevent the parallel rigid chain from detaching. Attached Figure Description

[0026] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0027] Figure 1 This is a schematic diagram of the overall structure of the lifting mechanism described in Embodiment 2 of this utility model;

[0028] Figure 2 This is a partial structural schematic diagram of the lifting mechanism described in Embodiment 2 of this utility model;

[0029] Figure 3 This is a schematic diagram of the overall structure of the chain described in Embodiment 1 of this utility model;

[0030] Figure 4 This is a partial exploded view of the parallel rigid chain described in Embodiment 1 of this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Chain body; 11. Chain;

[0033] 2. First link; 21. First chain plate;

[0034] 3. Second link; 31. Second plate;

[0035] 4. Third link; 41. Third plate; 411. Fourth plate; 412. Fifth plate; 42. Connecting plate; 421. Connecting hole;

[0036] 51. First through hole; 52. Second through hole; 53. Third through hole; 54. Fourth through hole; 55. Fifth through hole; 56. Sixth through hole;

[0037] 61. First pin; 62. Second pin; 63. Third pin;

[0038] 71. First semicircular hole; 72. Second semicircular hole; 73. Third semicircular hole; 74. Fourth semicircular hole;

[0039] 8. Housing; 81. Guide groove; 811. Vertical section; 812. 1 / 4 arc section; 813. First horizontal section; 814. 1 / 2 arc section; 815. Second horizontal section; 82. Drive wheel assembly; 821. Sprocket; 83. Drive shaft; 84. Bearing. Detailed Implementation

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0041] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] Taking the parallel rigid chain described in this utility model as an example, the directional terms used in the embodiments, such as "up," "down," "left," "right," "front," and "back," are... Figure 1 The vertical direction (also known as the height direction or the overall Z direction), the front-back direction (also known as the length direction or the overall Y direction), and the left-right direction (also known as the width direction or the overall X direction) in the state shown are defined based on the reference.

[0043] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0044] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] Example 1

[0046] This embodiment relates to a parallel rigid chain that can increase the lifting stroke of the device and reduce the height of the device when it is at zero position, thereby facilitating transportation and storage.

[0047] In terms of overall structure, such as Figures 1 to 4 As shown, the parallel rigid chain of this embodiment includes at least two chain bodies 1 arranged at intervals along a second preset direction, and each chain body 1 includes multiple chain sections 11 connected in sequence.

[0048] Each chain 11 includes a first chain link 2 and a second chain link 3 connected in sequence. The first chain link 2 has a first chain plate 21 on both sides in the width direction, and the second chain link 3 has a second chain plate 31 on both sides in the width direction. Each first chain plate 21 is used to connect the first chain link 2 and the second chain link 3, and each second chain plate 31 is used to connect two adjacent chains 11. The upper edges of the first chain link 2, the second chain link 3, the first chain plate 21 and the second chain plate 31 are symmetrically provided with the same rounded corners.

[0049] Furthermore, the upper half of the first link 2 and the second link 3 are provided with a first through hole 51 and a second through hole 52 arranged at intervals along a first preset direction. The upper half of the first chain plate 21 and the second chain plate 31 are provided with a third through hole 53 and a fourth through hole 54 arranged at intervals along a first preset direction. The first link 2 and the second link 3 are provided with a first pin 61 coaxial with the third through hole 53 and a second pin 62 coaxial with the fourth through hole 54. The first link 2, the second link 3, the first chain plate 21 and the second chain plate 31 are provided with a third pin 63 extending along a second preset direction. Each third pin 63 is used to receive external drive.

[0050] Meanwhile, the first link 2 is movably connected to the second link 2 via the second through hole 52 and the third through hole 53 on the first link plate 21 via the second pin 62, and the second link 3 is movably connected to the second link 3 via the first through hole 51 and the fourth through hole 54 on the first link plate 21 via the first pin 61.

[0051] At this time, with the above configuration, the first through hole 51 and the second through hole 52 on the first chain link 2 and the second chain link 3, the third through hole 53 and the fourth through hole 54 on the first chain plate 21 and the second chain plate 31, as well as the first pin 61 and the second pin 62, can realize the movable connection between the first chain link 2 and the first chain plate 21, and between the second chain link 3 and the first chain plate 21. This facilitates the extension or retraction of the chain body 1, which is beneficial for increasing the lifting stroke. After the chain body 1 is extended, each chain link fits tightly, which is beneficial for increasing the load-bearing capacity. At the same time, after the chain body 1 is retracted, the overall height of the device is low, which is beneficial for transportation and storage.

[0052] It should be noted that, in this embodiment, the first preset direction is the length direction of the first link 2 (i.e., Figure 1 The second preset direction is the width direction of the first link 2 (as described in the previous section). Figure 1 (as shown in the left and right directions). Furthermore, the external drive in this embodiment can be a motor from the prior art.

[0053] In this embodiment, the number of chains 11 can be set to seven. Of course, it can also be designed and adjusted according to the actual lifting height, for example, it can be set to eight or nine. Furthermore, the first chain plate 21 and the second chain plate 31 in any chain 11, as well as any second chain plate 31, are all abutted against the first chain plate 21 in the adjacent chain 11, thereby avoiding the accumulation of errors formed in the chain body 1 during the production process, and thus reducing the process cost.

[0054] In specific implementation, the second pin 62 passes sequentially through the third through hole 53 on one of the first chain plates 21, the second through hole 52 on the first chain link 2, and the third through hole 53 on the other first chain plate 21, connecting a pair of first chain plates 21 to the first chain link 2. Simultaneously, the first pin 61 passes sequentially through the fourth through hole 54 on one of the first chain plates 21, the first through hole 51 on the second chain link 3, and the fourth through hole 54 on the other first chain plate 21, completing the assembly connection between the first chain link 2 and the second chain link 3.

[0055] Furthermore, the first link 2 can rotate around the second pin 62, and the second link 3 can rotate around the first pin 61. Moreover, the rounded corners of the upper edges of the first link 2 and the second link 3 facilitate the extension and retraction of the chain body 1, thereby making the device easier to transport and store.

[0056] Based on the above overall introduction, in this embodiment, as a preferred implementation, such as Figure 2 and Figure 4 As shown, it also includes a third link 4 connected to the chain 11 located at the first end. The third link 4 is used to connect to the carrying platform, and the third link 4 is the same as the first link 2 or the second link 3.

[0057] Furthermore, a third chain plate 41 is provided on both sides of the third chain link 4 in the width direction, and each third chain plate 41 is used to connect the third chain link 4 and the adjacent first chain link 2.

[0058] Here, the third chain plate 41 enables the third chain link 4 to have lateral bending resistance, thereby strengthening the structural strength of the parallel rigid chain at its lowest point and ensuring the stability of the device. Simultaneously, it also strengthens the connection between the third chain link 4 and the adjacent first chain link 2.

[0059] It should be noted that the third link 4 is the same as the first link 2 or the second link 3. That is, the third link 4 is also provided with a first pin 61, a second pin 62 and a third pin 63. At the same time, its geometric dimensions, the opening position of each through hole, the position of the second pin 62, the first pin 61 and the position of the third pin 63 mentioned below are all the same as the first link 2 or the second link 3.

[0060] In the specific structure, the end of the third link 4 furthest from the first link 2 is provided with a connecting plate 42. The connecting plate 42 has multiple connecting holes 421, which facilitates the connection of the bearing platform to the connecting plate 42. It should be noted that in this embodiment, the number of connecting holes 421 is preferably set to four, and they are distributed in a rectangular shape, so as to ensure the force balance of the bearing platform.

[0061] In practice, the support platform and the connecting plate 42 can be connected by screws. Of course, in addition to screws, other common connection methods, such as welding, can also be used.

[0062] Furthermore, in this embodiment, as a preferred implementation, such as Figure 4 As shown, the third link 4 and the third link plate 41 are both provided with a third pin 63, and each third pin 63 is arranged at a distance along a first preset direction.

[0063] Here, by setting third pins 63 and arranging them at intervals, it is convenient to receive external drives, thereby facilitating the extension or retraction of the chain body 1. Specifically, each third pin 63 on each chain link passes through itself along a second preset direction, and each pair of chain plates' third pins 63 sequentially passes through one chain plate and the other chain plate along the second preset direction. Simultaneously, the third pins 63 on each chain link and the third pins 63 on each pair of chain plates are arranged alternately and at intervals. In practice, the external drive sequentially abuts against each third pin 63, thereby driving the corresponding chain body 1 to extend or retract.

[0064] Specifically, in this embodiment, as a preferred implementation, such as Figure 3 and Figure 4 As shown, in the first preset direction, the lower half of the first link 2, the second link 3, the first chain plate 21 and the second chain plate 31 are respectively provided with a first semi-circular hole 71 and a second semi-circular hole 72 on both sides. The first semi-circular hole 71 and the second semi-circular hole 72 are symmetrically arranged, and a fifth through hole 55 is provided at the midpoint of the line connecting the centers of the first semi-circular hole 71 and the second semi-circular hole 72. Each fifth through hole 55 is coaxially arranged with the corresponding third pin 63.

[0065] Meanwhile, a third semi-circular hole 73 is provided on the lower half of the third link 4 and the third link plate 41, and on the side close to the first link 2.

[0066] Therefore, by setting the first semicircular hole 71 and the second semicircular hole 72 on the first link 2 and the second link 3, the first link 2 and the second link 3 can be limited by the engagement of the two semicircular holes with the third pin 63 on the first chain plate 21, thereby restricting the rotation of the first link 2 and the second link 3, which in turn helps to enhance the load-bearing capacity of the parallel rigid chain.

[0067] It should be noted that the third link 4 and the third link plate 41 are provided with the third semi-circular hole 73 on only one side, which can enhance their structural strength. In specific implementation, the third semi-circular hole 73 on the third link 4 is connected with the first semi-circular hole 71 on the adjacent first link 2, which can engage with the third pin 63 on the third link plate 41.

[0068] When the parallel rigid chain switches from the retracted state to the extended state, the first link 2, the second link 3, the first chain plate 21, and the second chain plate 31 rotate in sequence. When the second link 3 rotates to be parallel to the first link 2, the first semicircular hole 71 on the second link 3 aligns with the second semicircular hole 72 on the first link 2 and engages with the third pin 63 on the first chain plate 21 to prevent the first link 2 and the second link 3 from continuing to rotate, thereby ensuring the rigidity of the transmission.

[0069] Meanwhile, when the second chain plate 31 rotates to be parallel to the first chain plate 21, the first semi-circular hole 71 on the second chain plate 31 mates with the second semi-circular hole 72 on the first chain plate 21 and engages with the third pin 63 on the second chain plate 31, preventing the first chain plate 21 and the second chain plate 31 from continuing to rotate, so as to ensure the stability of the transmission.

[0070] Furthermore, in this embodiment, as a preferred implementation, such as Figure 4 As shown, each third chain plate 41 includes a fourth chain plate 411 and a fifth chain plate 412. Each fifth chain plate 412 is provided with a sixth through hole 56 coaxially arranged with the first pin 61 on the third chain link 4. Furthermore, the fourth chain plate 411 is the same as the first chain plate 21 or the second chain plate 31. Here, the third chain plate 41 is composed of the fourth chain plate 411 and the fifth chain plate 412, which can ensure the structural strength of the third chain link 4, and the structure is simple and easy to design and implement.

[0071] It should be noted that the third chain plate 41 in this embodiment is a whole. In order to clearly explain the structure of the third chain plate 41, it is divided into the fourth chain plate 411 and the fifth chain plate 412 for description.

[0072] In the specific structure, the fourth chain plate 411 is the same as the first chain plate 21 or the second chain plate 31, which means that the fourth chain plate 411 is completely the same as the first chain plate 21 or the second chain plate 31, that is, the geometric dimensions, the position of each through hole and each semi-circular hole are the same. Setting the third chain plate 41 as above can enhance the structural strength of the parallel rigid chain at the lowest point.

[0073] In specific implementation, the fourth semi-circular hole 74 on the fifth chain plate 412 aligns with the first semi-circular hole 71 on the fourth chain plate 411, and engages with the third pin 63 on the third chain link 4. Simultaneously, the third chain link 4 is connected to the adjacent first chain link 2 via the fourth chain plate 411, the principle of which is the same as the principle of the connection between the first chain link 2 and the second chain link 3 via the first chain plate 21, and will not be elaborated further here.

[0074] In this embodiment, the parallel rigid chain can enhance the load-bearing capacity of the device by setting the first link 2, the second link 3, the two first chain plates 21, and the two second chain plates 31 in each chain 11. At the same time, the extension or retraction of the parallel rigid chain can be realized by the movable connection between the first chain plate 21 and the second chain plate 31 and between the first link 2 and the second link 3, thereby facilitating transportation and storage.

[0075] Example 2

[0076] This embodiment relates to a lifting mechanism, including a housing 8, a guide groove 81 disposed in the housing 8, and a drive wheel assembly 82 rotatably disposed on the housing 8, and also includes the parallel rigid chain as in Embodiment 1.

[0077] It is worth mentioning that the parallel rigid chain in this embodiment can be multiple chains arranged at intervals along the width direction of the box 8. The specific number can be designed and adjusted according to the size of the rated load, for example, it can be set to three or four.

[0078] In the specific structure, when the parallel rigid chain is in the retracted state, it is wound in the guide groove 81 to save space. When lifting is required, the parallel rigid chain slides out of the housing 8 along the guide groove 81 under the drive of the sprocket 821 and continues to be lifted to the preset height, which can achieve a large lifting stroke.

[0079] The drive wheel assembly 82 includes two sprockets 821 arranged at intervals along a second preset direction on both sides of each chain body 1. Each third pin 63 has its two ends respectively engaged with the two sprockets 821. The use of two sprockets 821 ensures reliable transmission of the parallel rigid chain, thereby guaranteeing the stability of its movement. Furthermore, the sprockets 821 are simple in structure and easy to arrange. It should be noted that, in addition to having two sprockets, only one sprocket can be used, thus saving resources and reducing production costs.

[0080] Moreover, in this embodiment, as a preferred implementation, such as Figure 1 and Figure 2 As shown, the housing 8 is provided with a drive shaft 83 extending along a second preset direction, and each sprocket 821 is sleeved on the drive shaft 83. Here, by setting the drive shaft 83, the sprockets 821 can be driven through a simple structure, thereby enabling the extension or retraction of the parallel rigid chain.

[0081] In practice, the external driving power is transmitted to the sprocket 821 through the drive shaft 83, thereby driving the parallel rigid chain to move. Furthermore, it is worth mentioning that a bearing 84 is provided at the connection between the drive shaft 83 and the housing 8 in this embodiment, which reduces frictional loss of the drive shaft 83 and helps to extend its service life.

[0082] Furthermore, considering the stability of parallel rigid chain drives, in this embodiment, as a preferred implementation, such as... Figure 2 As shown, each chain body 1 slides in the guide groove 81 via the first pin 61 and the second pin 62 on it. Furthermore, each chain body (1) is provided with two guide grooves 81 on both sides along the second preset direction, and each guide groove 81 includes a vertical section 811, a 1 / 4 arc section 812, a first horizontal section 813, a 1 / 2 arc section 814 and a second horizontal section 815 connected in sequence, and the drive shaft 83 is located at the connection between the vertical section 811 and the 1 / 4 arc section 812.

[0083] Here, the guide groove 81 allows the second pin 62 and the first pin 61 to slide on it, guiding the parallel rigid chain and effectively preventing it from detaching. Simultaneously, the various sections within the guide groove 81 allow the parallel rigid chain to wind within it, reducing the device's height at the zero position and increasing its lifting stroke. Furthermore, the drive shaft 83 is positioned at the connection between the vertical section 811 and the quarter-circular section 812, facilitating transmission between the sprocket 821 and the parallel rigid chain, thus ensuring transmission feasibility.

[0084] In this embodiment, when the lifting mechanism is stored, the parallel rigid chain is in a retracted state, and the third link 4 is located at the starting position, that is, at the connection between the vertical segment 811 and the 1 / 4 arc segment 812. Furthermore, the third link 4 always remains in a vertical state.

[0085] When the parallel rigid chain switches from the retracted state to the extended state, the parallel rigid chain is driven by two sprockets 821. The first link 2, the second link 3, the first chain plate 21 and the second chain plate 31 in each chain rotate in sequence. When the second link 3 rotates to be parallel to the first link 2, the first semi-circular hole 71 on the second link 3 aligns with the second semi-circular hole 72 on the first link 2 and engages with the third pin 63 on the first chain plate 21. This achieves a tight contact between the end faces of the first link 2 and the second link 3, thereby ensuring the rigidity of the transmission.

[0086] Simultaneously, after the connecting plate 42 on the third chain plate 41 contacts and fixes the bearing platform, power continues to be applied, thereby pushing the bearing platform upward. After the pushing is completed, the reverse power is transmitted to the drive shaft 83 through the motor, and the transmission meshes between the sprocket 821 and each third pin 63 again. Under the guidance of the guide groove 81, the parallel rigid chain moves downward into the housing 8 until the third chain link 4 is at the lowest point, thus completing the retraction of the parallel rigid chain.

[0087] The lifting mechanism in this embodiment, by adopting the parallel rigid chain as in Embodiment 1, can increase the lifting stroke of the device and reduce the height of the device when it is at zero position, thereby facilitating transportation and storage.

[0088] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A parallel rigid chain, characterized in that: It includes at least two chain bodies (1) arranged at intervals along a second preset direction, and each chain body (1) includes multiple chain sections (11) connected in sequence; Each chain (11) includes a first link (2) and a second link (3) connected in sequence. The first link (2) has a first chain plate (21) on both sides in the width direction, and the second link (3) has a second chain plate (31) on both sides in the width direction. Each first chain plate (21) is used to connect the first link (2) and the second link (3), and each second chain plate (31) is used to connect two adjacent chains (11). The upper edges of the first link (2), the second link (3), the first chain plate (21), and the second chain plate (31) are symmetrically provided with the same rounded corners. The upper half of the first link (2) and the second link (3) are provided with a first through hole (51) and a second through hole (52) arranged at a distance along a first preset direction. The upper half of the first chain plate (21) and the second chain plate (31) are provided with a third through hole (53) and a fourth through hole (54) arranged at a distance along a first preset direction. The first link (2) and the second link (3) are provided with a first pin (61) coaxial with the third through hole (53) and a second pin (62) coaxial with the fourth through hole (54). The first link (2), the second link (3), the first chain plate (21) and the second chain plate (31) are provided with a third pin (63) extending along a second preset direction. Each of the third pins (63) is used to receive external drive. The first link (2) is movably connected to the second pin (62) on the first chain plate (21) via the second through hole (52) thereon and the third through hole (53) thereon. The second link (3) is movably connected to the first pin (61) on the first chain plate (21) via the first through hole (51) thereon and the fourth through hole (54) thereon.

2. The parallel rigid chain according to claim 1, characterized in that: It also includes a third link (4) connected to the chain (11) located at the first end, the third link (4) being used to connect to the carrying platform, and the third link (4) being the same as the first link (2) or the second link (3); The third link (4) has a third link plate (41) on each side in the width direction. Each third link plate (41) is used to connect the third link (4) and the adjacent first link (2).

3. The parallel rigid chain according to claim 2, characterized in that: The third link (4) and the third link plate (41) are each provided with a third pin (63), and each third pin (63) is arranged at a distance along a first preset direction.

4. The parallel rigid chain according to claim 3, characterized in that: In a first preset direction, the lower half of the first link (2), the second link (3), the first chain plate (21), and the second chain plate (31) are respectively provided with a first semi-circular hole (71) and a second semi-circular hole (72) on both sides. The first semi-circular hole (71) and the second semi-circular hole (72) are symmetrically arranged, and a fifth through hole (55) is provided at the midpoint of the line connecting the centers of the first semi-circular hole (71) and the second semi-circular hole (72). Each of the fifth through holes (55) is coaxially arranged with the corresponding third pin (63); and / or, The lower half of the third link (4) and the third link plate (41) are provided with a third semi-circular hole (73) on the side close to the first link (2).

5. The parallel rigid chain according to claim 4, characterized in that: Each of the third chain plates (41) includes a fourth chain plate (411) and a fifth chain plate (412), and each of the fifth chain plates (412) is provided with a sixth through hole (56) coaxially disposed with the first pin (61) on the third chain link (4); The fourth chain plate (411) is the same as the first chain plate (21) or the second chain plate (31).

6. A lifting mechanism, characterized in that: It includes a housing (8), a guide groove (81) disposed in the housing (8), and a drive wheel assembly (82) rotatably disposed on the housing (8), and also includes a parallel rigid chain as described in any one of claims 1 to 5.

7. The lifting mechanism according to claim 6, characterized in that: The drive wheel assembly (82) includes two sprockets (821) arranged at a distance along a second preset direction on both sides of each chain body (1), and the two ends of each third pin (63) are respectively engaged with the corresponding two sprockets (821).

8. The lifting mechanism according to claim 7, characterized in that: The housing (8) is provided with a drive shaft (83) extending along a second preset direction, and each of the sprockets (821) is sleeved on the drive shaft (83).

9. The lifting mechanism according to claim 8, characterized in that: Each of the chain bodies (1) slides in the guide groove (81) via the first pin (61) and the second pin (62) thereon; Each chain body (1) is provided with two guide grooves (81) on both sides along the second preset direction, and each guide groove (81) includes a vertical section (811), a 1 / 4 arc section (812), a first horizontal section (813), a 1 / 2 arc section (814) and a second horizontal section (815) connected in sequence, and the drive shaft (83) is located at the connection between the vertical section (811) and the 1 / 4 arc section (812).

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