Back wheel assembly and rack type lifting system

Abstract

The utility model relates to the technical field of lifting equipment, and provides a back wheel assembly and a rack type lifting system.The back wheel assembly comprises a supporting component, an adjusting component and a back wheel component, the adjusting component comprises an adjusting shaft, and the adjusting shaft is arranged on the supporting component; the back wheel component comprises a connecting component, a first back wheel component and a second back wheel component, the first back wheel component and the second back wheel component are arranged on the connecting component, the connecting component is arranged on the adjusting shaft in a sleeving mode and is in running fit with the adjusting shaft, and the first back wheel component and the second back wheel component are located on the two sides of the adjusting shaft respectively. The back wheel assembly provided by the utility model is used for overcoming the defect of unstable operation of an elevator in the prior art, and the operation stability of a rack type lifting system can be improved through the running fit of the connecting component and the adjusting shaft, the first back wheel component and the second back wheel component; the risk that the elevator body falls due to tooth breakage of the driving gear assembly or the rack can be reduced, and the safety of the elevator body can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, in particular to a back wheel assembly and a rack type lifting system. Background Art

[0002] The rack type elevator is a lifting equipment with a rack ladder as a guide rail. Therefore, during the operation of the rack type elevator, a driving gear is required for guiding, and at the same time, a corresponding back wheel needs to be arranged opposite to the driving gear to support the rack type elevator to rise or fall along the rack ladder. However, during the production, manufacturing and installation of the rack ladder, errors will inevitably occur. For example, the docking parts of some rack ladders will be uneven. These problems will cause the elevator to run unstably in minor cases, and in severe cases, it will cause broken teeth of the driving gear or the rack, which will further cause the elevator to fall and trigger unsafe accidents. Summary of the Utility Model

[0003] The first aspect of the utility model provides a back wheel assembly to solve the defect of unstable operation of the elevator in the prior art. Through the rotational cooperation between the connecting member and the adjusting shaft, as well as the first back wheel member and the second back wheel member, the running stability of the rack type lifting system can be improved, the risk of the elevator main body falling due to broken teeth of the driving gear assembly or the rack can be reduced, and the safety of the elevator main body can be greatly improved.

[0004] The second aspect of the utility model provides a rack type lifting system.

[0005] The back wheel assembly provided by the utility model includes:

[0006] A support member;

[0007] An adjusting member, including an adjusting shaft, and the adjusting shaft is arranged on the support member;

[0008] A back wheel member, including a connecting member and a first back wheel member and a second back wheel member arranged on the connecting member. The connecting member is sleeved on the adjusting shaft and is rotationally matched with the adjusting shaft. The first back wheel member and the second back wheel member are respectively located on both sides of the adjusting shaft.

[0009] According to the back wheel assembly provided by the utility model, the support member includes a connecting piece, a first support piece and a second support piece. The first support piece and the second support piece are oppositely arranged at both ends of the connecting piece;

[0010] One end of the adjusting shaft penetrates through the first support piece, and the other end penetrates through the second support piece.

[0011] According to the back gear assembly provided by the present utility model, the adjusting shaft includes a first connecting section, a second connecting section, and an eccentric section. The eccentric section is disposed between the first connecting section and the second connecting section, and the eccentric section is not coaxial with the first connecting section and the second connecting section;

[0012] The first connecting section passes through the first support member, the second connecting section passes through the second support member, the connecting member is sleeved on the eccentric section and is rotationally matched with the eccentric section, and the eccentric section is used to adjust the position of the connecting member relative to the connecting piece.

[0013] According to the back gear assembly provided by the present utility model, the adjusting member further includes:

[0014] A first locking member, which is disposed on the adjusting shaft and is located on the side of the first support member away from the second support member;

[0015] A second locking member, which is disposed on the adjusting shaft and is located on the side of the second support member away from the first support member.

[0016] According to the back gear assembly provided by the present utility model, the adjusting member further includes a self-locking member, the self-locking member is disposed on the adjusting shaft, and the self-locking member is used to prevent the adjusting shaft from rotating;

[0017] The self-locking member is located between the first locking member and the first support member, and / or the self-locking member is located between the second locking member and the second support member.

[0018] According to the back gear assembly provided by the present utility model, the self-locking member includes a limit baffle and a limit member. The limit baffle is sleeved on the adjusting shaft and is provided with a plurality of limit openings;

[0019] When the self-locking member is located between the first locking member and the first support member, the first support member is provided with a first limit hole corresponding to the position of the limit opening, and the limit member is adapted to be fixed in the first limit hole after passing through the limit opening;

[0020] When the self-locking member is located between the second locking member and the second support member, the second support member is provided with a second limit hole corresponding to the position of the limit opening, and the limit member is adapted to be fixed in the second limit hole after passing through the limit opening.

[0021] According to the back wheel assembly provided by the present utility model, when the self-locking member is located between the first locking member and the first support member, the first support member is further provided with a first compensation hole corresponding to the position of the limiting opening. The limiting member is adapted to pass through the limiting opening and then be fixed in the first compensation hole, and the first compensation hole is used to compensate for the locking error of the first limiting hole;

[0022] When the self-locking member is located between the second locking member and the second support member, the second support member is further provided with a second compensation hole corresponding to the position of the limiting opening. The limiting member is adapted to pass through the limiting opening and be fixed in the second compensation hole, and the second compensation hole is used to compensate for the locking error of the second limiting hole.

[0023] The rack-type lifting system provided by the present utility model includes a rack ladder, a lift main body, a driving gear assembly, and the back wheel assembly according to any one of the above. The driving gear assembly and the back wheel assembly are relatively arranged on both sides of the lift main body, and the driving gear assembly and the back wheel assembly are adapted to drive the lift main body to move linearly along the rack ladder.

[0024] According to the rack-type lifting system provided by the present utility model, there are two back wheel assemblies, and there are also two driving gear assemblies. The two driving gear assemblies are symmetrically arranged along the center line of the two back wheel assemblies.

[0025] According to the rack-type lifting system provided by the present utility model, the distance between the two driving gear assemblies is less than or equal to the distance between the two back wheel assemblies.

[0026] According to the rack-type lifting system provided by the present utility model, the rack ladder includes a first vertical beam, a second vertical beam, a rack, and a cross beam. The first vertical beam and the second vertical beam are relatively arranged, and the cross beam is arranged between the first vertical beam and the second vertical beam;

[0027] The rack extends in the same direction as the first vertical beam and the second vertical beam, and is arranged on one of the first vertical beam, the second vertical beam, and the cross beam. The driving gear assembly and the back wheel assembly are relatively arranged on both sides of the rack.

[0028] The back wheel assembly provided by the present invention comprises a connecting member sleeved on the adjusting shaft, the two being rotatably matched, a first back wheel member and a second back wheel member being provided on the connecting member, and the first back wheel member and the second back wheel member being respectively provided on both sides of the adjusting shaft. In this way, when the back wheel assembly is applied to a rack-type lifting system, during the lifting process, if there are uneven places on the rack ladder, such as an uneven joint between two adjacent sections of the rack ladder, if one of the first back wheel member and the second back wheel member first contacts the joint and is lifted up, due to the connection between the connecting member and the adjusting shaft, the first back wheel member and the second back wheel member are respectively provided on both sides of the adjusting shaft. When the joint shaft rotates in coordination, the other one of the first back wheel component and the second back wheel component will be pressed against the rack ladder. In other words, the first back wheel component and the second back wheel component can form a movement principle similar to that of a seesaw. If one of them is away from the rack ladder, the other one will inevitably be close to the rack ladder. This arrangement can ensure that at least one of the first back wheel component and the second back wheel component is always in contact with the rack ladder, which can effectively improve the stability of the rack-type lifting system at the joint of the rack ladder and effectively prevent the vibration of the lift body.

[0029] Compared with the prior art, the back wheel assembly provided in the embodiment of the present invention can ensure that at least one of the first back wheel component and the second back wheel component remains in contact with the rack ladder during operation of the rack-type lifting system. This can improve the stability of the operation of the rack-type lifting system, reduce the risk of the driving gear assembly or rack teeth breaking and causing the elevator body to fall, and greatly improve the safety of the elevator body. In addition, such a setting can also reduce the precision requirements of the rack ladder in assembly and manufacturing, and reduce the difficulty of production and assembly of the overall system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a front view of the back wheel assembly provided by an embodiment of the present utility model.

[0032] Figure 2 It is an axial side schematic diagram of the back wheel assembly provided in an embodiment of the present utility model.

[0033] Figure 3 This is a schematic diagram of the layout of the back wheel assembly provided in an embodiment of the present utility model.

[0034] Figure 4 It is a structural diagram of a rack-type lifting system provided in an embodiment of the present utility model.

[0035] Figure 5 It is a schematic cross-sectional structure view of the back wheel assembly provided by an embodiment of the present utility model from a certain perspective.

[0036] Figure 6 It is a left view of the back wheel assembly provided by an embodiment of the present utility model.

[0037] Figure 7 It is a schematic cross-sectional structure view of the back wheel assembly provided by an embodiment of the present utility model from another perspective.

[0038] Figure 8 It is a schematic structure view of the limit baffle provided by an embodiment of the present utility model.

[0039] Figure 9 It is a schematic structure view of the first support member provided by an embodiment of the present utility model.

[0040] Figure 10 It is a top view of the rack-type lifting system provided by an embodiment of the present utility model.

[0041] Figure 11 It is one of the layout schematic views of the rack provided by an embodiment of the present utility model.

[0042] Figure 12 It is another layout schematic view of the rack provided by an embodiment of the present utility model.

[0043] Figure 13 It is a third layout schematic view of the rack provided by an embodiment of the present utility model.

[0044] Reference numerals:

[0045] 10: Rack ladder; 11: First vertical beam; 12: Second vertical beam; 13: Rack; 14: Cross beam; 20: Lift main body; 30: Driving gear assembly; 40: Back wheel assembly;

[0046] 100: Support component; 110: Connecting piece; 120: First support member; 121: First limiting hole; 122: First compensation hole; 130: Second support member; 140: Reinforcing member;

[0047] 200: Adjusting component; 210: Adjusting shaft; 211: First connecting section; 212: Second connecting section; 213: Eccentric section; 220: First locking member; 230: Second locking member; 240: Self-locking component; 241: Limit baffle; 2411: Limit opening; 242: Limiting piece; 243: First self-locking washer; 250: Adjusting shaft sleeve; 251: Positioning sleeve; 252: First oil-free shaft sleeve; 253: First shaft sleeve; 254: Second oil-free shaft sleeve; 255: Second shaft sleeve;

[0048] 300: Back gear component; 310: Connecting component; 311: First connecting plate; 312: Second connecting plate; 313: Connecting plate; 320: First back gear component; 3201: Back gear; 3202: Bolt; 3203: Flat washer; 3204: Third bushing; 3205: First retaining ring; 3206: First bearing; 3207: First spacer sleeve; 3208: Second bearing; 3209: Second spacer sleeve; 3211: Second retaining ring; 3212: Washer; 3213: Second self-locking washer; 3214: Locking nut; 330: Second back gear component. Detailed implementation manner

[0049] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0050] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0051] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0052] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0053] Figure 1 is the front view of the back gear assembly provided by the embodiment of the present utility model; Figure 2 is the axonometric schematic diagram of the back gear assembly provided by the embodiment of the present utility model.

[0054] Refer to Figure 1 and Figure 2 Referring to

[0055] It should be noted that the first back gear member 320 in the embodiment of the present utility model may include one back gear or multiple back gears. Figure 2 The situation where the first back gear member 320 includes one back gear is shown. In the case where the first back gear member 320 includes multiple back gears, the multiple back gears are arranged at intervals along the length direction of the connecting member 310. The specific number of the back gears 3201 can be adaptively set according to actual needs. Refer to Figure 1 and Figure 2 In the embodiment of the present utility model, the case where the first back gear member 320 includes one back gear is taken as an example for illustration. The setting of the second back gear member 330 is similar to that of the first back gear member 320. For details, refer to the first back gear member 320, which will not be elaborated herein.

[0056] Figure 3 is the layout schematic diagram of the back gear assembly provided by the embodiment of the present utility model; Figure 4It is a schematic structural diagram of the rack-type lifting system provided by the embodiment of the present utility model.

[0057] Refer to Figure 3 and Figure 4 The working principle of the back wheel assembly 40 provided by the embodiment of the present utility model is shown as follows: The back wheel assembly 40 of the rack-type lifting system and the driving gear assembly 30 are relatively clamped on both sides of the rack ladder 10 to maintain the stability and reliability of the lift body 20. During the lifting process, the rack ladder 10 serves as the crawling track for the back wheel assembly 40 and the driving gear assembly 30 respectively. The driving gear assembly 30 serves as the power wheel set, and the back wheel assembly 40 serves as the driven wheel set. The driving gear assembly 30 and the back wheel assembly 40 crawl synchronously along the length direction of the rack 13.

[0058] Refer to Figures 1 to 4 It can be understood that for the back wheel assembly 40 provided by the embodiment of the present utility model, the connecting member 310 is sleeved on the adjusting shaft 210, and the two are rotationally matched. The first back wheel member 320 and the second back wheel member 330 are arranged on the connecting member 310, and the first back wheel member 320 and the second back wheel member 330 are respectively arranged on both sides of the adjusting shaft 210. In this way, when the back wheel assembly 40 is applied to the rack-type lifting system, during the lifting process, if there are uneven places on the rack ladder 10, such as the splicing place where two adjacent sections of the rack ladder 10 are butted unevenly, if one of the first back wheel member 320 and the second back wheel member 330 first contacts the splicing place and is lifted, due to the rotational cooperation between the connecting member 310 and the adjusting shaft 210, then the other of the first back wheel member 320 and the second back wheel member 330 will be pressed against the rack ladder 10. In other words, the first back wheel member 320 and the second back wheel member 330 can form a principle similar to that of a seesaw. If one of them moves away from the rack ladder 10, then the other will surely move closer to the rack ladder 10. Such a setting can ensure that at least one of the first back wheel member 320 and the second back wheel member 330 is always in contact with the rack ladder 10, which can effectively improve the smoothness of the rack-type lifting system passing through the butt joint of the rack ladder 10 and effectively prevent the vibration of the lift body 20.

[0059] Compared with the prior art, the back wheel assembly 40 provided by the embodiment of the present utility model can ensure that at least one of the first back wheel member 320 and the second back wheel member 330 is in contact with the rack ladder 10 during the operation of the rack-type lifting system. This can improve the running stability of the rack-type lifting system, reduce the risk of the lift body 20 falling due to broken teeth of the driving gear assembly 30 or the rack 13, and greatly improve the safety of the lift body 20; in addition, such a setting can also reduce the precision requirements for the assembly and manufacturing of the rack ladder 10 and reduce the difficulty of overall system production and assembly.

[0060] Continue to refer to Figure 2 In an alternative embodiment of the present utility model, the support member 100 includes a connecting member 110, a first support member 120, and a second support member 130. The first support member 120 and the second support member 130 are oppositely arranged at both ends of the connecting member 110. One end of the adjusting shaft 210 passes through the first support member 120, and the other end passes through the second support member 130. The back gear member 300 is located between the first support member 120 and the second support member 130; the connecting member 110, the first support member 120, and the second support member 130 can be plate-shaped members or rod-shaped members. For example, the connecting member 110, the first support member 120, and the second support member 130 can be set as a connecting plate, a first support plate, and a second support plate. Specifically, it can be adaptively selected according to the actual situation.

[0061] The first support member 120 and the second support member 130 can be used to connect the back gear assembly 40 to the elevator main body 20. Specifically, a plurality of through holes can be provided on the first support member 120 or the second support member 130 for fastening connections with fasteners such as screws or bolts. The connection between the first support member 120 and the second support member 130 and the elevator main body 20 can be adaptively designed with reference to the prior art, and will not be elaborated herein in the embodiments of the present utility model.

[0062] It can be understood that in the back gear assembly 40 provided by the embodiments of the present utility model, the first support member 120 and the second support member 130 can respectively support the adjusting shaft 210 from both sides of the adjusting shaft 210. Compared with the prior art solution of only supporting the adjusting shaft 210 from one side, the setting of this embodiment can make the contact points between the adjusting shaft 210 and the support member 100 more, which is more conducive to the stress transfer inside the overall structure and can enable the back gear assembly 40 to bear a greater load.

[0063] Continue to refer to FIG. 2. In an alternative embodiment of the present utility model, the support member 100 further includes a reinforcing member 140. The reinforcing member 140 is disposed between the first support member 120 and the second support member 130, abuts against the connecting member 110, and is disposed on the side of the connecting member 110 facing the adjusting shaft 210. The reinforcing member 140 is similar to the connecting member 110 and the like described above, and can also be set as a plate-shaped member or a rod-shaped member. For example, it can be set as a reinforcing plate.

[0064] It can be understood that in the back gear assembly 40 provided by the embodiments of the present utility model, by providing the reinforcing member 140, the connection area between the first support member 120 and the second support member 130 can be made larger, which is beneficial to improving the stress transfer inside the support member 100, can reduce the load pressure borne by the connecting member 110, and can improve the service life of the support member 100.

[0065] Figure 5It is a schematic cross-sectional structure diagram of the back gear assembly provided by the embodiment of the present utility model from a certain perspective.

[0066] Refer to Figure 2 and Figure 5 In an alternative embodiment of the present utility model, the connecting member 310 includes a first connecting plate 311, a second connecting plate 312, and a connecting plate 313. The first connecting plate 311 and the second connecting plate 312 are relatively arranged on both sides of the connecting plate 313. Mounting holes for assembling the first back gear member 320, the second back gear member 330, and the adjusting shaft 210 are correspondingly provided on the first connecting plate 311 and the second connecting plate 312. Specifically, the size and dimensions of the mounting holes can be adaptively designed according to the requirements of the first back gear member 320, the second back gear member 330, and the adjusting shaft 210.

[0067] It can be understood that in the back gear assembly 40 provided by the embodiment of the present utility model, the design of the first connecting plate 311 and the second connecting plate 312 enables the connecting member 310 to be connected to the first back gear member 320, the second back gear member 330, and the adjusting shaft 210 respectively from both sides. On the one hand, this can ensure the stability of the first back gear member 320, the second back gear member 330, and the adjusting shaft 210. On the other hand, it is beneficial to the transmission of stress between structures.

[0068] Refer to Figure 5 In an alternative embodiment of the present utility model, the adjusting shaft 210 includes a first connecting section 211, a second connecting section 212, and an eccentric section 213. The eccentric section 213 is provided between the first connecting section 211 and the second connecting section 212; the first connecting section 211 passes through the first support member 120, the second connecting section 212 passes through the second support member 130, and the connecting member 310 is sleeved on the eccentric section 213 and is rotationally matched with the eccentric section 213.

[0069] Specifically, the cross-sectional area of the eccentric section 213 is large, the cross-sectional areas of the first connecting section 211 and the second connecting section 212 are small, and the eccentric section 213 is not coaxial with the first connecting section 211 and the second connecting section 212. In this way, by rotating the adjusting shaft 210, the distance between the connecting member 310 sleeved on the adjusting shaft 210 and the connecting member 110 can be adjusted.

[0070] Refer to Figure 3 , Figure 4 and Figure 5, it can be understood that in the back gear assembly 40 provided by the embodiment of the present utility model, the distance between the connecting member 310 and the connecting piece 110 is adjusted by setting the adjusting shaft 210. In this way, when the back gear assembly 40 is applied to a rack-type lifting system, since the first back gear member 320 and the second back gear member 330 are mounted on the connecting member 310, based on this, the gap between the first back gear member 320 and the second back gear member 330 and the driving gear assembly 30 can be flexibly adjusted. In other words, the gap between the driving gear assembly 30 and the rack 13 can be adjusted. In this way, on the one hand, the excessive gap between the driving gear assembly 30 and the rack 13 can be avoided, and thus the vibration and noise of the rack-type lifting system can be effectively reduced; on the other hand, the too small gap between the driving gear assembly 30 and the rack 13 can be avoided, and thus the wear between the rack-type lifting system and the rack 13 can be effectively reduced; further, the problems of tooth breakage and tooth slipping of the driving gear assembly 30 and the rack 13 can be effectively prevented.

[0071] Figure 6 is the left view of the back gear assembly provided by the embodiment of the present utility model.

[0072] Refer to Figure 5 and Figure 6 , in an alternative embodiment of the present utility model, the adjusting member 200 further includes a first locking member 220 and a second locking member 230. The connecting member 310 is sleeved on the adjusting shaft 210 and is rotationally matched with the adjusting shaft 210; the first locking member 220 is provided at one end of the adjusting shaft 210 and is located on the side of the first support member 120 away from the second support member 130; the second locking member 230 is provided at the other end of the adjusting shaft 210 and is located on the side of the second support member 130 away from the first support member 120; the first locking member 220 and the second locking member 230 can adopt existing locking nuts, and can be specifically set adaptively according to actual situations.

[0073] During assembly, the adjusting shaft 210 sequentially passes through the first support member 120, the connecting member 310, and the second support member 130 along a direction parallel to the connecting piece 110. The first locking member 220 is sleeved on the adjusting shaft 210 from the side of the first support member 120 away from the second support member 130 to lock the adjusting shaft 210, and the second locking member 230 is sleeved on the adjusting shaft 210 from the side of the second support member 130 away from the first support member 120 to lock the adjusting shaft 210.

[0074] When it is necessary to adjust the distance between the connecting member 310 and the connecting piece 110, loosen the first locking member 220 and the second locking member 230 at both ends of the adjusting shaft 210, and turn the adjusting shaft 210 with an adjustable wrench or a special adjusting wrench. After the gap between the connecting member 310 and the connecting piece 110 is adjusted in place, tighten the first locking member 220 and the second locking member 230 again, and the adjustment of the distance between the connecting member 310 and the connecting piece 110 by the adjusting shaft 210 can be completed.

[0075] Continue to refer to Figure 5 , in an alternative embodiment of the present invention, the adjusting member 200 further includes an adjusting shaft sleeve 250 sleeved on the adjusting shaft 210, a positioning sleeve 251, a first oil-free bushing 252, a first bushing 253, a second oil-free bushing 254 and a second bushing 255. The adjusting shaft sleeve 250 is located between the first support member 120 and the adjusting shaft 210. The positioning sleeve 251 is sleeved on the adjusting shaft sleeve 250 and is located on the side of the first support member 120 facing the second support member 130. The first oil-free bushing 252 is located between the first connecting plate 311 and the adjusting shaft 210 and abuts against the positioning sleeve 251 and the adjusting shaft sleeve 250. The second oil-free bushing 254 is located between the second connecting plate 312 and the adjusting shaft 210. The first bushing 253 is sleeved on the first oil-free bushing 252 and the second oil-free bushing 254, and both ends of the first bushing 253 abut against the first connecting plate 311 and the second connecting plate 312 respectively; the second bushing 255 is located between the second oil-free bushing 254 and the second support member 130; to ensure the functionality of the adjusting member 200, each component provided in this embodiment can be adaptively designed and added according to actual needs and the prior art, which will not be elaborated herein.

[0076] Figure 7 is a schematic cross-sectional structure diagram of the back gear assembly provided by the embodiment of the present invention from another perspective.

[0077] Refer to Figure 7, in an alternative embodiment of the present utility model, the first back wheel member 320 includes a back wheel 3201, a bolt 3202, a flat washer 3203 sleeved on the bolt 3202, a third bushing 3204, a first retaining ring 3205, a first bearing 3206, a first spacer sleeve 3207, a second bearing 3208, a second spacer sleeve 3209, a second retaining ring 3211, a washer 3212, a second self-locking washer 3213, a lock nut 3214, etc. The bolt 3202 is sequentially passed through the first connecting plate 311, the back wheel 3201, and the second connecting plate 312. The bolt 3202 may specifically be a hexagon socket precision fit bolt. The flat washer 3203 is disposed between the head of the bolt 3202 and the first connecting plate 311. The third bushing 3204 is disposed on the side of the first connecting plate 311 facing the second connecting plate 312. The first retaining ring 3205 is sleeved on the third bushing 3204. The first bearing 3206 is disposed on the side of the third bushing 3204 facing the second connecting plate 312 and abuts against the third bushing 3204 and the first retaining ring 3205 respectively. The first spacer sleeve 3207 is disposed on the side of the first bearing 3206 facing the second connecting plate 312. The second bearing 3208 is disposed on the side of the first spacer sleeve 3207 facing the second connecting plate 312. The second spacer sleeve 3209 is disposed on the side of the second bearing 3208 facing the second connecting plate 312. The second retaining ring 3211 is sleeved on the second spacer sleeve 3209. The washer 3212 is disposed on the side of the second connecting plate 312 away from the first connecting plate 311. The second self-locking washer 3213 is disposed on the side of the washer 3212 away from the second connecting plate 312. The lock nut 3214 is disposed on the side of the second self-locking washer 3213 away from the second connecting plate 312. Each of the above components can be adaptively added according to the actual situation and the prior art.

[0078] The specific structure of the second back wheel member 330 is similar to that of the first back wheel member 320. For details, reference may be made to the structure of the first back wheel member 320, which will not be elaborated herein in the embodiments of the present utility model.

[0079] Continue to refer to Figure 1 and Figure 2, in an alternative embodiment of the present utility model, the adjusting member 200 further includes a self-locking member 240. The self-locking member 240 is provided on the adjusting shaft 210 and is located in at least one of the spaces between the first locking member 220 and the first support member 120 and between the second locking member 230 and the second support member 130. In other words, the self-locking member 240 can be disposed between the first support member 120 and the first locking member 220, or between the second locking member 230 and the second support member 130, or both situations can exist simultaneously. The self-locking member 240 is used to prevent the adjusting shaft 210 from rotating. It can be understood that such a setting can effectively prevent the adjusting shaft 210 from rotating, solve problems such as vibration, noise, broken teeth and slipping teeth of the gear rack in the operation process of the rack-type lifting system, and ensure the safety of the operator.

[0080] Figure 8 is a schematic structural view of the limit baffle provided by an embodiment of the present utility model; Figure 9 is a schematic structural view of the first support member provided by an embodiment of the present utility model.

[0081] Refer to Figure 1 、 Figure 2 、 Figure 8 and Figure 9 , in an alternative embodiment of the present utility model, the self-locking member 240 includes a limit baffle 241 and a limiting member 242. The limit baffle 241 is provided with a plurality of limit openings 2411 and is sleeved on the adjusting shaft 210. The limit openings 2411 can be through holes opened on the limit baffle 241 or slits opened at the edge of the limit baffle 241. Refer to Figure 8 , in the embodiment of the present utility model, 8 equally spaced slits on the same circumference are taken as the limit openings 2411 for illustration. Of course, the number and specific positions of the limit openings 2411 can be adaptively set according to actual situations. For example, 16 limit openings 2411, 32 limit openings 2411, etc. can be set. The limit openings 2411 can also be arranged in different circles and unevenly. The above arrangement method is only an example given in the embodiment of the present utility model and is not a specific limitation of the present utility model.

[0082] As described above, there are at least three setting methods for the self-locking member 240:

[0083] First, when the self-locking member 240 is disposed between the first locking member 220 and the first support member 120, the first support member 120 is provided with a first limit hole 121 corresponding to the limit opening 2411. After the assembly is completed, the first limit hole 121 will be aligned with one of the plurality of limit openings 2411. At this time, the limiting member 242 is passed through the limit opening 2411 and fixed to the first limit hole 121, and the locking effect of the self-locking member 240 can be achieved.

[0084] It should be noted that the fixing method between the limiting member 242 and the first limiting hole 121 can be screw fixing (for example, the limiting member 242 is selected as a round head screw, and at the same time, corresponding internal threads are tapped in the first limiting hole 121 to achieve screw fixing) or snap fixing. The number of the first limiting holes 121 and the limiting members 242 can also be multiple. For example, 8 groups of first limiting holes 121 and limiting members 242 corresponding to 8 limiting openings 2411 are provided. Specifically, it can be adaptively set according to the actual situation.

[0085] Second, when the self-locking member 240 is arranged between the second locking member 230 and the second supporting member 130, a plurality of second limiting holes (not shown in the figure) corresponding to the limiting openings 2411 are provided on the second supporting member 130. After the assembly is completed, one of the plurality of limiting openings 2411 will be aligned with the second limiting hole. At this time, after passing the limiting member 242 through the limiting opening 2411 and fixing it to the second limiting hole, the locking effect of the self-locking member 240 can be achieved; for the fixing method and the number between the limiting member 242 and the second limiting hole, reference can be made to the first case described above.

[0086] Third, that is, both the first two cases are included. Specifically, reference can be made to the first two cases for adaptive setting. In an alternative embodiment of the present invention, when installing the adjusting shaft 210, an initial mark can be set on the limiting baffle 241 to calibrate the initial position of the adjusting shaft 210. For example, when the adjusting shaft 210 is installed, the initial position of the adjusting shaft 210 can be calibrated by the pre-set mark "A" on the limiting baffle 241. When the adjusting shaft 210 is adjusted subsequently, the rotation angle and the offset amount of the adjusting shaft 210 can be determined by checking the offset position of the mark "A". Based on this, the adjustment amount of the gap between the driving gear assembly 30 and the rack 13 can also be determined. Specifically, it can be adaptively set according to the actual situation and will not be elaborated herein.

[0087] Refer to Figure 1 、 Figure 2 、 Figure 8 and Figure 9, It can be understood that in the back gear assembly 40 provided by the embodiment of the present utility model, by providing a limiting opening 2411 on the limiting baffle 241 that matches the limiting member 242, and matching with the first limiting hole 121 provided on the first support member 120 or the second limiting hole provided on the second support member 130. In this way, after the gap between the driving gear assembly 30 and the rack 13 is adjusted by the adjusting shaft 210, the locking of the adjusting shaft 210 can be achieved through the mutually restrictive structure between the limiting baffle 241 and the limiting member 242. This can effectively prevent the adjusting shaft 210 from self-rotating, and can solve problems such as vibration, noise, and broken teeth and slipping teeth of the gear and rack during the operation of the rack-type lifting system, and can ensure the safety of the operator.

[0088] Continue to refer to Figure 1 and Figure 9 , In an alternative embodiment of the present utility model, when the self-locking member 240 is provided between the first locking member 220 and the first support member 120, the first support member 120 is further provided with a first compensation hole 122 corresponding to the position of the limiting opening 2411. When there is a locking error in the first limiting hole 121, the limiting member 242 can be fixed in the first compensation hole 122 after passing through one of the limiting openings 2411. In other words, the first compensation hole 122 is used to compensate for the locking error of the first limiting hole 121.

[0089] It should be noted that the locking error refers to: after the adjusting shaft 210 is adjusted in place, the first limiting hole 121 and the limiting opening 2411 cannot be aligned, and the limiting member 242 cannot pass through the limiting opening 2411 and the first limiting hole 121 at the same time. That is, the position and number of the existing first limiting holes 121 cannot meet the accuracy and offset of the current angle adjustment of the adjusting shaft 210.

[0090] It should also be noted that taking Figure 9 as an example, in this embodiment, two first compensation holes 122 are provided. The two first compensation holes 122 are concentric with the first limiting hole 121. The included angle between the radius where the first first compensation hole 122 is located and the radius where the first limiting hole 121 is located is 45°. The second first compensation hole 122 is provided on the side of the first first compensation hole 122 away from the first limiting hole 121, and the included angle between the radius where the second first compensation hole 122 is located and the radius where the first first compensation hole 122 is located is 15°. The above example is only a schematic example given by the embodiment of the present utility model. The position and number of the first compensation holes 122 can be adaptively set according to the actual situation. For example, three or four can be set. The position of the first compensation holes 122 can be non-concentric with the first limiting hole 121 and can be at any position that satisfies the compensation effect. Those skilled in the art should be able to reasonably infer other setting methods of the first compensation holes 122 based on the above example, and will not be elaborated herein one by one.

[0091] Referring to Figure 1 and Figure 9 it can be understood that in the back gear assembly 40 provided by the embodiment of the present utility model, by providing the first compensation hole 122, the locking error of the first limiting hole 121 can be compensated, the accuracy of the self-locking member 240 can be improved, the stability after the adjustment shaft 210 is locked can be ensured, and the back gear assembly 40 can be adapted to more working conditions.

[0092] In an alternative embodiment of the present utility model, when the self-locking member 240 is located between the second locking member 230 and the second support member 130, the second support member 130 is provided with a second compensation hole (not shown in the figure) corresponding to the position of the limiting opening 2411. For the specific structure and beneficial effects of the second compensation hole, reference can be made to the first compensation hole 122 described above, and details will not be repeated herein.

[0093] Continuing to refer to Figure 5 in an alternative embodiment of the present utility model, the self-locking member 240 includes two first self-locking washers 243. The first self-locking washers 243 have a corrugated surface and an inclined tooth surface. The inclined tooth surfaces of the two first self-locking washers 243 are arranged oppositely and sleeved on the adjustment shaft 210. When the first self-locking washer 243 is located between the first locking member 220 and the first support member 120, the corrugated surfaces of the two first self-locking washers 243 face the first locking member 220 and the first support member 120 respectively. The corrugated surface can enhance the friction coefficient between the first self-locking washer 243 and the first locking member 220 and the first support member 120, which is beneficial to the transfer of internal stress in the structure.

[0094] The situation where the first self-locking washer 243 is located between the second locking member 230 and the second support member 130 is similar to the situation where the first self-locking washer 243 is located between the first locking member 220 and the first support member 120. For the situation where the first self-locking washer 243 is located between the second locking member 230 and the second support member 130, reference can be made to the above description, and details will not be repeated herein. It can be understood that by providing the first self-locking washer 243, the rotation of the adjustment shaft 210 can be effectively prevented, the problems of vibration, noise, and broken teeth and slipping teeth of the gear and rack during the operation of the rack-type lifting system can be solved, and the safety of the operator can be ensured.

[0095] Figure 10 is a top view of the rack-type lifting system provided by the embodiment of the present utility model.

[0096] Referring to Figure 3 , Figure 4 and Figure 10, in the second aspect of the embodiments of the present utility model, a rack-type lifting system is provided. The rack-type lifting system includes a rack ladder 10, a lift main body 20, a driving gear assembly 30, and the back wheel assembly 40 described in any one of the foregoing embodiments. The driving gear assembly 30 and the back wheel assembly 40 are relatively arranged on both sides of the lift main body 20, and the driving gear assembly 30 and the back wheel assembly 40 are adapted to drive the lift main body 20 to move linearly along the rack ladder 10. It can be understood that the rack-type lifting system provided by the embodiments of the present utility model includes the back wheel assembly 40 described in any one of the foregoing embodiments, and thus has the beneficial effects of the back wheel assembly 40 described in any one of the foregoing embodiments. Specifically, please refer to the foregoing description, and details are not repeated herein.

[0097] Continue to refer to Figure 3 , in an alternative embodiment of the present utility model, there are two back wheel assemblies 40, and there are also two driving gear assemblies 30. The two driving gear assemblies 30 are symmetrically arranged along the center line of the two back wheel assemblies 40. In other words, the two driving gear assemblies 30 and the two back wheel assemblies 40 are symmetrically arranged along the same reference line.

[0098] It can be understood that in the rack-type lifting system provided by the embodiments of the present utility model, by providing two driving gear assemblies 30 and two back wheel assemblies 40, the lift main body 20 can bear a greater load, and the lift main body 20 can be more stable and safer during the lifting and crawling process; further, the two driving gear assemblies 30 and the two back wheel assemblies 40 are symmetrically arranged along the same reference line, so that the stress transmission between the two back wheel assemblies 40 and the two driving gear assemblies 30 can be more uniform, and the lift main body 20 can be more stable during the ascending and descending process.

[0099] Continue to refer to Figure 3 , in an alternative embodiment of the present utility model, the distance between the two back wheel assemblies 40 is L1, and the distance between the two driving gear assemblies 30 is L2. L2 is included in L1, that is, the distance between the two driving gear assemblies 30 is less than or equal to the distance between the two back wheel assemblies 40. It can be understood that when the distance between the two driving gears is less than the distance between the two back wheel assemblies 40, the overall structure of the rack-type lifting system can have better stress conditions, and the lift main body 20 can be more stable during the ascending and descending process.

[0100] When the distance between two drive gear assemblies 30 is equal to the distance between two idler gear assemblies 40, for a set of corresponding drive gear assembly 30 and idler gear assembly 40 in terms of position, it can make the axes of the drive gear assembly 30 and the idler gear assembly 40 on the same horizontal line. In this way, the stress transmission between the drive gear assembly 30 and the idler gear assembly 40 can be more direct, which can play a role in optimizing the stress transmission effect inside the structure.

[0101] Figure 11 It is one of the layout schematic diagrams of the rack provided by the embodiment of the present utility model; Figure 12 It is the second layout schematic diagram of the rack provided by the embodiment of the present utility model; Figure 13 It is the third layout schematic diagram of the rack provided by the embodiment of the present utility model.

[0102] Refer to Figure 3 、 Figures 11 to 13 In an alternative embodiment of the present utility model, the rack ladder 10 includes a first vertical beam 11, a second vertical beam 12, a rack 13 and a plurality of cross beams 14. The first vertical beam 11 and the second vertical beam 12 are arranged oppositely, and the plurality of cross beams 14 are arranged at intervals between the first vertical beam 11 and the second vertical beam 12. The rack 13 extends in the same direction as the first vertical beam 11 and the second vertical beam 12, and is provided on one of the first vertical beam 11, the second vertical beam 12 and the cross beam 14. In other words, the rack 13 can be attached to the first vertical beam 11, or can be attached to the second vertical beam 12, or can be attached to the cross beam 14 (that is, provided between the first vertical beam 11 and the second vertical beam 12). Moreover, the idler gear assembly 40 and the drive gear assembly 30 can clamp the rack ladder 10 (the idler gear assembly 40 and the drive gear assembly 30 are relatively clamped on both sides of the rack ladder 10), or can only clamp the rack 13 (the idler gear assembly 40 and the drive gear assembly 30 are relatively clamped on both sides of the rack 13), as long as it is ensured that the idler gear assembly 40 and the drive gear assembly 30 are always relatively arranged on both sides of the rack 13.

[0103] Taking the rack 13 provided on the first vertical beam 11 as an example, the tooth top of the rack 13 can face any one of the front, rear, left and right of the first vertical beam 11. Specifically, the orientation of the tooth top of the rack 13 can be adaptively designed according to needs. Figure 3 As shown, the rack 13 is provided on the first vertical beam 11, the tooth top of the rack 13 faces the right side of the first vertical beam 11, and the idler gear assembly 40 and the drive gear assembly 30 clamp the rack ladder 10. When the rack 13 is provided on the second vertical beam 12 or the cross beam 14, the layout of the rack 13 provided on the first vertical beam 11 can be referred to, and details will not be repeated here.

[0104] It should be noted that the terms "front", "rear", "left" and "right" described above are only adaptive expressions given for clear explanation in the embodiments of the present invention, and do not constitute specific limitations on the present invention.

[0105] It can be understood that the diverse layout schemes of the rack 13 can make the mechanism of the rack-type lifting system more flexible and variable, and can meet more different actual needs.

[0106] It should be noted that the technical solutions in the various embodiments of the present invention can be combined with each other, but the basis for combination is that those skilled in the art can implement it; when the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist, that is, it does not fall within the protection scope of the present invention either.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A back gear assembly, characterized in that, Comprising: A support member (100); An adjustment member (200), including an adjustment shaft (210), the adjustment shaft (210) being provided on the support member (100); A back gear member (300), including a connecting member (310) and a first back gear member (320) and a second back gear member (330) provided on the connecting member (310), the connecting member (310) being sleeved on the adjustment shaft (210) and rotatably engaged with the adjustment shaft (210), the first back gear member (320) and the second back gear member (330) being respectively located on both sides of the adjustment shaft (210).

2. The back gear assembly according to claim 1, characterized in that, The support member (100) includes a connecting member (110), a first support member (120) and a second support member (130), the first support member (120) and the second support member (130) being oppositely arranged at both ends of the connecting member (110); One end of the adjustment shaft (210) passes through the first support member (120), and the other end passes through the second support member (130).

3. The back gear assembly according to claim 2, characterized in that, The adjustment shaft (210) includes a first connection section (211), a second connection section (212) and an eccentric section (213), the eccentric section (213) being provided between the first connection section (211) and the second connection section (212), the eccentric section (213) not being coaxial with the first connection section (211) and the second connection section (212); The first connection section (211) passes through the first support member (120), the second connection section (212) passes through the second support member (130), the connecting member (310) is sleeved on the eccentric section (213) and rotatably engaged with the eccentric section (213), the eccentric section (213) being used to adjust the position of the connecting member (310) relative to the connecting member (110).

4. The back gear assembly according to claim 2, wherein, The adjustment member (200) further includes: A first locking member (220), provided on the adjustment shaft (210) and located on a side of the first support member (120) away from the second support member (130); A second locking member (230), provided on the adjustment shaft (210) and located on a side of the second support member (130) away from the first support member (120).

5. The back gear assembly according to claim 4, wherein, The adjustment member (200) further includes a self-locking member (240), the self-locking member (240) being provided on the adjustment shaft (210), the self-locking member (240) being used to prevent the adjustment shaft (210) from rotating; The self-locking member (240) is located between the first locking member (220) and the first support member (120), and / or, the self-locking member (240) is located between the second locking member (230) and the second support member (130).

6. The back gear assembly according to claim 5, wherein The self-locking member (240) includes a limit baffle (241) and a limiting member (242), the limit baffle (241) being sleeved on the adjustment shaft (210) and provided with a plurality of limit openings (2411); When the self-locking member (240) is located between the first locking member (220) and the first support member (120), the first support member (120) is provided with a first limiting hole (121) corresponding to the position of the limiting opening (2411), and the limiting member (242) is adapted to be fixed to the first limiting hole (121) after passing through the limiting opening (2411); When the self-locking member (240) is located between the second locking member (230) and the second support member (130), the second support member (130) is provided with a second limiting hole corresponding to the position of the limiting opening (2411), and the limiting member (242) is adapted to be fixed to the second limiting hole after passing through the limiting opening (2411).

7. The back gear assembly according to claim 6, wherein When the self-locking member (240) is located between the first locking member (220) and the first support member (120), the first support member (120) is further provided with a first compensation hole (122) corresponding to the position of the limiting opening (2411), and the limiting member (242) is adapted to be fixed to the first compensation hole (122) after passing through the limiting opening (2411), and the first compensation hole (122) is used to compensate for the locking error of the first limiting hole (121); When the self-locking member (240) is located between the second locking member (230) and the second support member (130), the second support member (130) is further provided with a second compensation hole corresponding to the position of the limiting opening (2411), and the limiting member (242) is adapted to be fixed to the second compensation hole after passing through the limiting opening (2411), and the second compensation hole is used to compensate for the locking error of the second limiting hole.

8. A rack-type lifting system, characterized in that, It includes a rack ladder (10), a lift main body (20), a driving gear assembly (30) and the back gear assembly (40) according to any one of the preceding claims 1 to 7. The driving gear assembly (30) and the back gear assembly (40) are relatively arranged on both sides of the lift main body (20), and the driving gear assembly (30) and the back gear assembly (40) are adapted to drive the lift main body (20) to move linearly along the rack ladder (10).

9. The rack-type lifting system according to claim 8, wherein, There are two back gear assemblies (40), and there are also two driving gear assemblies (30). The two driving gear assemblies (30) are symmetrically arranged along the center line of the two back gear assemblies (40).

10. The rack-type lifting system according to claim 9, characterized in that, The distance between the two driving gear assemblies (30) is less than or equal to the distance between the two back gear assemblies (40).

11. The rack-type lifting system according to claim 8, characterized in that, The rack ladder (10) includes a first vertical beam (11), a second vertical beam (12), a rack (13) and a cross beam (14). The first vertical beam ( The rack (13) extends in the same direction as the first vertical beam (11) and the second vertical beam (12), and is provided on one of the first vertical beam (11), the second vertical beam (12), and the cross beam (14). The drive gear assembly (30) and the back gear assembly (40) are oppositely arranged on both sides of the rack (13).

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