Horizontal guide wheel set and hoisting system

Abstract

The invention relates to the technical field of hoisting equipment, and provides a horizontal guide wheel set and a hoisting system. The horizontal guide wheel group comprises a mounting seat and a guide wheel; the mounting seat comprises a first connecting part and a second connecting part which are vertically connected; the guide wheel comprises a wheel body and a wheel shaft, the wheel body is rotationally connected with the wheel shaft, the wheel shaft is detachably connected with the second connecting part, and the wheel body is located below the second connecting part. When the horizontal guide wheel set provided by the invention is mounted, the first connecting part which is vertically arranged can be attached to the side wall of the end beam, and the bottom of the end beam of the wheel body of the guide wheel positioned below the first connecting part is compact in structure, and is relatively suitable for parts with relatively high requirements on the mounting space on the outer side of the end beam of hoisting equipment; the installation of the horizontal guide wheel set is met, and meanwhile, the horizontal guide wheel set, fixing bolts of a crane track, the ground and the like have enough safe space, so that the horizontal guide wheel set can be installed and used in a narrow space between the lower surface of the end beam and the ground.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting equipment, and in particular to a horizontal guide wheel set and a lifting system. Background Art

[0002] In order to reduce the wheel gnawing force and improve the positioning accuracy of the crane, the crane is generally equipped with a horizontal wheel set. The horizontal wheel set can significantly reduce the friction between the wheel and the track by effectively sharing the weight of the crane and ensuring the smooth operation of the wheel on the track, thereby reducing the gnawing phenomenon. In addition, the horizontal wheel set can also improve the overall positioning accuracy of the crane, allowing it to control the position more accurately during operation, especially in applications that require high-precision positioning.

[0003] In the prior art, the horizontal wheel set is usually arranged at the end of the end beam of the crane. This layout helps to disperse the wheel burden and improve the stability of the crane. However, since the horizontal wheel set is usually arranged at the end of the end beam of the crane, in order to ensure its stability and load capacity, the existing design often requires a larger structural space. This makes the installation position of the horizontal wheel set susceptible to space restrictions, especially when the end of the crane needs to be equipped with a windproof and anti-skid device (such as a windproof iron wedge), the demand for structural space is further increased, causing the overall design to become larger and more complex. Summary of the invention

[0004] The present invention provides a horizontal guide wheel group and a lifting system, which are used to solve the defect that the existing horizontal wheel group has poor structural compactness, resulting in the installation position being easily restricted by space.

[0005] One aspect of the present invention provides a horizontal guide wheel group, comprising: a mounting seat and a guide wheel.

[0006] The mounting seat includes a first connecting portion and a second connecting portion which are vertically connected, wherein the first connecting portion is used to connect to the side wall of the end beam, and when connected, the second connecting portion is located at the bottom of the end beam; the guide wheel includes a wheel body and a wheel axle, wherein the wheel body is rotatably connected to the wheel axle, and the wheel axle is detachably connected to the second connecting portion, and the wheel body is located below the second connecting portion.

[0007] The horizontal guide wheel group provided according to the present invention further includes a connecting plate, which is connected to the inner wall of the first connecting part, so that the first connecting part is connected to the side wall of the end beam through the connecting plate.

[0008] According to the horizontal guide wheel group provided by the present invention, side panels are respectively provided on both sides of the second connecting portion along the first direction, the top of the side panel is connected to the bottom of the connecting plate, and a protective groove is formed at the bottom of the side panel below the second connecting portion, and at least part of the wheel body is located in the protective groove.

[0009] According to the horizontal guide wheel assembly provided by the present invention, the first connecting portion, the second connecting portion and the side plate are integrally arranged.

[0010] According to the horizontal guide wheel group provided by the present invention, a limit slot is provided in the middle of the second connecting part, and two limit connecting parts are symmetrically provided on the outer wall of the wheel axle. Both of the two limit connecting parts are limitedly matched with the limit slot to limit the rotation and axial displacement of the wheel axle.

[0011] According to the horizontal guide wheel group provided by the present invention, the limiting slot includes two first contact surfaces arranged opposite to each other, and an arc-shaped matching portion located between the two first contact surfaces, and the limiting connection portion includes two second contact surfaces arranged opposite to each other, and a third contact surface located between the two second contact surfaces; the first contact surface cooperates with the corresponding second contact surface, the second contact surface located above cooperates with the upper surface of the second connection portion, the second contact surface located below cooperates with the lower surface of the second connection portion, and the outer wall of the wheel axle cooperates with the arc-shaped matching portion.

[0012] The horizontal guide wheel group provided according to the present invention also includes a fixing member, which includes a third connecting part and a fourth connecting part that are vertically connected, the third connecting part is buckled on the top of the wheel axle, and the fourth connecting part is detachably connected to the side wall of the second connecting part.

[0013] According to the horizontal guide wheel assembly provided by the present invention, the third connecting portion and the fourth connecting portion are integrally arranged.

[0014] According to the horizontal guide wheel assembly provided by the present invention, an oil channel is provided in the wheel axle, the outlet end of the oil channel is located at the rotational fit between the wheel body and the wheel axle, and an oil nozzle is provided at the inlet end of the oil channel.

[0015] Another aspect of the present invention provides a lifting system, comprising an end beam and a horizontal guide wheel group as described in any one of the above items, wherein the horizontal guide wheel group is arranged on the end beam.

[0016] The horizontal guide wheel group provided by the present invention arranges the mounting seat of the guide wheel as an L-shaped structure including a first connecting part and a second connecting part connected vertically. During installation, the vertically arranged first connecting part can be fitted against the side wall of the end beam, and the bottom of the wheel body end beam of the guide wheel located below the first connecting part is made to have a compact structure. The horizontal guide wheel group is more suitable for parts with high requirements for the installation space outside the end beam of the lifting equipment. While meeting the installation requirements of the horizontal guide wheel group, there is also enough safety space with the fixing bolts of the crane track, the ground, etc., to ensure that the horizontal guide wheel group can be installed and used in the narrow space between the lower surface of the end beam and the ground.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 creative work.

[0019] Figure 1 Schematic diagram of a horizontal guide wheel assembly provided in an embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of a mounting seat in a horizontal guide wheel assembly provided in an embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of the guide wheel in the horizontal guide wheel group provided in an embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of a fixing member in a horizontal guide wheel assembly provided in an embodiment of the present invention.

[0023] Figure 5 Schematic diagram of a lifting system provided by an embodiment of the present invention.

[0024] Figure 6 yes Figure 5 A is a partial enlarged schematic diagram of the middle part.

[0025] Reference numerals: 10. Horizontal guide wheel assembly; 110. Mounting seat; 111. First connecting portion; 112. Second connecting portion; 113. Side plate; 114. Protective groove; 115. Limiting slot; 1151. First contact surface; 1152. Arc-shaped matching portion; 120. Guide wheel; 121. Wheel body; 122. Wheel axle; 1221. Second contact surface; 1222. Third contact surface; 123. Oil nozzle; 130. Connecting plate; 140. Fixing piece; 141. Third connecting portion; 142. Fourth connecting portion; 20. End beam. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the embodiments of the present invention, 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 can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0029] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0031] Combine the following Figures 1 to 6 The invention describes a horizontal wire sheave assembly and a lifting system.

[0032] See also Figures 1 to 3 As shown, the horizontal guide wheel group 10 provided in the embodiment of the present invention includes: a mounting seat 110 and a guide wheel 120 .

[0033] The mounting seat 110 includes a first connecting portion 111 and a second connecting portion 112 which are vertically connected. The first connecting portion 111 is used to connect to the side wall of the end beam 20, and when connected, the second connecting portion 112 is located at the bottom of the end beam 20; the guide wheel 120 includes a wheel body 121 and a wheel axle 122. The wheel body 121 is rotatably connected to the wheel axle 122, and the wheel axle 122 is detachably connected to the second connecting portion 112. The wheel body 121 is located below the second connecting portion 112.

[0034] The horizontal guide wheel group 10 provided by the present invention is configured such that the mounting seat 110 of the guide wheel 120 is configured as an L-shaped structure including a first connecting portion 111 and a second connecting portion 112 vertically connected. During installation, the vertically arranged first connecting portion 111 can be fitted against the side wall of the end beam 20, and the wheel body 121 of the guide wheel 120 located below the first connecting portion 111 is placed at the bottom of the end beam 20. The structure is compact and is more suitable for locations with high requirements for the installation space outside the end beam 20 of the lifting equipment. While meeting the installation requirements of the horizontal guide wheel group 10, there is also sufficient safety space with the fixing bolts of the crane track, the ground, etc., to ensure that the horizontal guide wheel group 10 can be installed and used in the narrow space between the lower surface of the end beam 20 and the ground.

[0035] Specifically, the mounting base 110 includes a first connecting portion 111 and a second connecting portion 112 connected vertically, and the overall cross-section is L-shaped. The first connecting portion 111 is vertically arranged, the second connecting portion 112 is horizontally arranged, and the bottom of the first connecting portion 111 is connected to the second connecting portion 112, such as by welding, bolting (connected by bolt connectors) or integrally arranged.

[0036] The mounting base 110 is made of corrosion-resistant metal material, such as stainless steel, to ensure its stability and service life when used outdoors.

[0037] The guide wheel 120 includes a wheel body 121 and a wheel axle 122, the wheel axle 122 is vertically arranged and connected to the second connecting portion 112, the wheel body 121 is horizontally arranged and rotatably connected to the wheel axle 122, for example, the wheel body 121 and the wheel axle 122 are configured to be rotatably connected through a bearing, the wheel body 121 is sleeved on the outer ring of the bearing, and the inner ring of the bearing is sleeved on the wheel axle 122, the wheel body 121 and the outer ring of the bearing are interference fit, and the inner ring of the bearing and the wheel axle 122 are interference fit. After the sling is wound around the wheel body 121, the wheel body 121 can guide the sling.

[0038] See also Figure 1 As shown, according to some embodiments of the present invention, the horizontal guide wheel group 10 also includes a connecting plate 130, which is connected to the inner wall of the first connecting part 111 so that the first connecting part 111 is connected to the side wall of the end beam 20 through the connecting plate 130.

[0039] By providing a connection plate 130 connected to the inner wall of the first connection portion 111 , the first connection portion 111 can be connected to the side wall of the end beam 20 through the connection plate 130 , thereby increasing the contact area with the side wall of the end beam 20 and the connection stability.

[0040] Specifically, before installation, the connecting plate 130 is pre-connected to the inner surface of the first connecting portion 111. The two can be fixedly connected (such as welding or integral setting) or detachably connected (such as snap-on, bolted, etc.). During installation, the connecting plate 130 is fixedly connected to the side wall (web) of the end beam 20 to achieve effective fixation of the horizontal guide wheel group 10.

[0041] Preferably, the connecting plate 130 is detachably connected to the inner wall of the first connecting portion 111, so that the remaining components of the horizontal guide wheel group 10 except the connecting plate 130 can be easily removed from the end beam 20 for maintenance or replacement.

[0042] See also Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, the second connecting portion 112 is provided with side panels 113 on both sides along the first direction, the top of the side panel 113 is connected to the bottom of the connecting plate 130, and the bottom of the side panel 113 is formed with a protective groove 114 below the second connecting portion 112, and at least part of the wheel body 121 is located in the protective groove 114.

[0043] It should be noted that the above-mentioned “first direction” specifically refers to Figure 2 Direction of arrow shown in .

[0044] By respectively arranging the side plates 113 on both sides of the second connection portion 112 along the first direction, the structural strength of the mounting seat 110 can be strengthened by the side plates 113, thereby improving the stability of the horizontal guide wheel set 10 when it is installed on the end beam 20. At the same time, since the bottom of the two side plates 113 is formed with a protective groove 114 below the second connection portion 112, the protective groove 114 can protect at least part of the wheel body 121, thereby reducing the probability of the wheel body 121 being disturbed by the outside world.

[0045] Specifically, the side panel 113 is a rectangular plate-shaped component, the upper edge of which is welded and fixed to the bottom of the connecting plate 130, the middle part is connected to the side panel 113 of the second connecting part 112, and the lower edges of the two side panels 113 extend below the bottom surface of the second connecting part 112 to form a protective groove 114.

[0046] According to some embodiments of the present invention, the first connection portion 111 , the second connection portion 112 and the side plate 113 are integrally provided.

[0047] By configuring the first connection part 111, the second connection part 112 and the side plate 113 as an integrated arrangement, the connection structure between the first connection part 111, the second connection part 112 and the side plate 113 can be eliminated, thereby improving the integrity and strength of the horizontal guide wheel group 10, and also eliminating the connection (such as welding) process of the first connection part 111, the second connection part 112 and the side plate 113.

[0048] See also Figures 1 to 3 As shown, according to some embodiments of the present invention, a limiting slot 115 is provided in the middle of the second connecting portion 112, and two limiting connecting portions are symmetrically provided on the outer wall of the axle 122, and both limiting connecting portions are limitedly matched with the limiting slot 115 to limit the rotation and axial displacement of the axle 122.

[0049] By providing a limiting connection structure between the second connection portion 112 and the wheel axle 122 , the rotation and axial displacement of the wheel axle 122 can be limited, thereby improving the stability of the wheel body 121 during operation.

[0050] Specifically, the limiting slot 115 includes two first contact surfaces 1151 arranged opposite to each other, and an arc-shaped matching portion 1152 located between the two first contact surfaces 1151; the limiting connection portion includes two second contact surfaces 1221 arranged opposite to each other, and a third contact surface 1222 located between the two second contact surfaces 1221; the first contact surface 1151 cooperates with the corresponding second contact surface 1221, the second contact surface 1221 located above cooperates with the upper surface of the second connection portion 112, the second contact surface 1221 located below cooperates with the lower surface of the second connection portion 112, and the outer wall of the wheel axle 122 cooperates with the arc-shaped matching portion 1152.

[0051] During installation, align the arc surface of the axle 122 with the arc-shaped matching portion 1152 of the limiting slot 115. At this time, the third contact surfaces 1222 of the two limiting connection parts are respectively fitted with the first contact surfaces 1151 corresponding to the limiting slot 115, and then the axle 122 is pushed into the limit position in the limiting slot 115, so that the arc surface of the axle 122 is matched with the arc-shaped matching portion 1152 of the limiting slot 115. After the installation is completed, the second contact surfaces 1221 on the upper and lower sides of the limiting connection part are respectively matched with the upper and lower surfaces of the second connection part 112, so that the axle 122 can be stably clamped in the limiting slot 115. And the axle 122 can be placed in or taken out of the limiting slot 115 by pushing and pulling, which is convenient for assembly.

[0052] See also Figure 1 and Figure 4 As shown, according to some embodiments of the present invention, the horizontal guide wheel group 10 also includes a fixing member 140, the fixing member 140 includes a third connecting portion 141 and a fourth connecting portion 142 vertically connected, the third connecting portion 141 is buckled on the top of the wheel axle 122, and the fourth connecting portion 142 is detachably connected to the side wall of the second connecting portion 112.

[0053] Specifically, after the wheel axle 122 is inserted into the limiting slot 115 , the fixing member 140 can further fix the wheel axle 122 in the limiting slot 115 , thereby preventing the wheel axle 122 from slipping along the length direction of the slot.

[0054] The side wall of the second connection part 112 facing the fourth connection part 142 is provided with a screw hole, and the corresponding position of the third connection part 141 is provided with a mounting hole. During installation, the mounting hole on the third connection part 141 is aligned with the screw hole on the side wall of the fourth connection part 142, and then a threaded connector is inserted through the mounting hole and threadedly connected with the screw hole, which is convenient for disassembly and assembly. After the threaded connector is unscrewed, the wheel shaft 122 can be easily taken out of the limit slot 115.

[0055] According to some embodiments of the present invention, the third connection portion 141 and the fourth connection portion 142 are integrally provided.

[0056] Similarly, by integrally arranging the third connection part 141 and the fourth connection part 142, the connection structure between the third connection part 141 and the fourth connection part 142 can be eliminated, thereby improving the integrity and strength of the horizontal guide wheel group 10, and also saving the connection (such as welding) process of the third connection part 141 and the fourth connection part 142.

[0057] See also Figure 1 and Figure 3 As shown, according to some embodiments of the present invention, an oil passage is provided in the axle 122 , the outlet end of the oil passage is located at the rotational fit between the wheel body 121 and the axle 122 , and an oil nozzle 123 is provided at the inlet end of the oil passage.

[0058] By setting an oil passage in the wheel axle 122 that is connected to the rotating fitting part of the wheel body 121 and the wheel axle 122, the rotating fitting part (such as the bearing) of the wheel body 121 and the wheel axle 122 can be regularly filled with lubricating oil through the oil nozzle 123 set at the inlet end of the oil passage, which is easy to operate.

[0059] In addition, the oil channel structure does not occupy the external space of the horizontal guide wheel group 10, and can ensure the compactness of the horizontal guide wheel group 10.

[0060] The lifting system provided by the present invention is described below. The lifting system described below and the horizontal guide wheel group 10 described above can be referred to each other.

[0061] See also Figure 5 and Figure 6 As shown, the lifting system provided by the embodiment of the present invention includes an end beam 20 and a horizontal guide wheel group 10 as described in any of the above embodiments, and the horizontal guide wheel group 10 is arranged on the end beam 20.

[0062] The lifting system provided by the present invention, due to the adoption of the above-mentioned horizontal guide wheel group 10, can facilitate the installation of the horizontal guide wheel group 10 through the side of the end beam 20, thereby improving the flexibility of the lifting system.

[0063] Specifically, in the horizontal guide wheel group 10, the connecting plate 130 is welded to the side wall of the end beam 20, and then the mounting seat 110 is detachably connected to the connecting plate 130 using bolts and other connecting parts. After installation, the top of the side plate 113 can maintain a set distance with the bottom of the end beam 20, or the top of the side plate 113 can be in contact with the bottom of the end beam 20, thereby improving the stability of the horizontal guide wheel group 10 when it is fixed. When the horizontal guide wheel group 10 needs to be maintained or replaced, all parts of the horizontal guide wheel group 10 except the connecting plate 130 can be removed at the same time by loosening the connecting parts such as bolts, which is easy to operate.

[0064] See also Figure 5 and Figure 6 As shown, as an example, the horizontal guide wheel group 10 is configured with four sets when used, with two sets at the front and two sets at the sides of the end beam 20. Considering the gap between the wheel body 121 and the side of the track, adjustment gaskets can be added or reduced between the connecting plate 130 and the mounting seat 110 to adjust the distance between the wheel body 121 and the side of the track.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A horizontal guide wheel assembly, characterized in that: include: A mounting seat, the mounting seat comprising a first connecting portion and a second connecting portion that are vertically connected, the first connecting portion being used to connect to a side wall of the end beam, and the second connecting portion being located at the bottom of the end beam when connected; The guide wheel comprises a wheel body and a wheel axle, the wheel body is rotatably connected to the wheel axle, the wheel axle is detachably connected to the second connecting portion, and the wheel body is located below the second connecting portion.

2. The horizontal guide wheel assembly according to claim 1, characterized in that: It also includes a connecting plate, which is connected to the inner wall of the first connecting part, so that the first connecting part is connected to the side wall of the end beam through the connecting plate.

3. The horizontal guide wheel assembly according to claim 2, characterized in that: The second connecting portion is provided with side panels on both sides along the first direction, the top of the side panel is connected to the bottom of the connecting plate, a protective groove is formed at the bottom of the side panel below the second connecting portion, and at least part of the wheel body is located in the protective groove.

4. The horizontal guide wheel assembly according to claim 3, characterized in that: The first connection portion, the second connection portion and the side plate are integrally arranged.

5. The horizontal guide wheel assembly according to claim 1, characterized in that: A limiting slot is provided in the middle of the second connecting portion, and two limiting connecting portions are symmetrically provided on the outer wall of the wheel axle. Both of the two limiting connecting portions are limitedly matched with the limiting slot to limit the rotation and axial displacement of the wheel axle.

6. The horizontal guide wheel assembly according to claim 5, characterized in that: The position-limiting slot includes two first contact surfaces arranged opposite to each other, and an arc-shaped matching portion located between the two first contact surfaces; the position-limiting connecting portion includes two second contact surfaces arranged opposite to each other, and a third contact surface located between the two second contact surfaces; The first contact surface cooperates with the corresponding second contact surface, the second contact surface located above cooperates with the upper surface of the second connecting part, the second contact surface located below cooperates with the lower surface of the second connecting part, and the outer wall of the wheel axle cooperates with the arc-shaped cooperation part.

7. The horizontal guide wheel assembly according to claim 5, characterized in that: It also includes a fixing member, which includes a third connecting part and a fourth connecting part that are vertically connected. The third connecting part is buckled on the top of the wheel axle, and the fourth connecting part is detachably connected to the side wall of the second connecting part.

8. The horizontal guide wheel assembly according to claim 7, characterized in that: The third connection portion and the fourth connection portion are integrally provided.

9. The horizontal guide wheel assembly according to any one of claims 1 to 8, characterized in that: An oil passage is arranged in the wheel axle, an outlet end of the oil passage is located at the rotational matching position of the wheel body and the wheel axle, and an oil nozzle is arranged at the inlet end of the oil passage.

10. A lifting system, characterized in that: It comprises an end beam and a horizontal guide wheel group as described in any one of claims 1 to 9, wherein the horizontal guide wheel group is arranged on the end beam.

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