Transmission backrest wheel of construction hoist

Abstract

The utility model relates to a transmission coupling of a construction hoist, which belongs to the field of building hoisting and transporting machinery. The bending mechanism comprises a bearing, an eccentric backrest wheel shaft, a rolling piece, a bending plate, a pressing sleeve, a transmission plate frame and an adjusting shaft sleeve, the rolling piece is fixed on the eccentric backrest wheel shaft through the bearing, the bending plate is installed on the transmission plate frame, the pressing sleeve is assembled on the eccentric backrest wheel shaft, the adjusting shaft sleeve is of an eccentric structure, and the eccentric backrest wheel shaft is sleeved with the adjusting shaft sleeve. The whole backrest wheel structure is of a two-end supporting structure, the stress condition is good, the mechanical performance is more stable, meanwhile, building ash can be prevented from falling into the backrest wheel, and the backrest wheel is prevented from falling off; the backrest wheel shaft and the adjusting shaft sleeve are oppositely assembled from the two sides of the transmission plate frame correspondingly, assembling, disassembling and adjusting are convenient, and the use requirement is met.

Description

Technical Field

[0001] The utility model relates to a transmission backrest wheel, in particular to a transmission backrest wheel of a construction hoist, and belongs to the field of construction lifting and transport machinery. Background Art

[0002] The transmission device of the construction hoist is the key component of the construction hoist. The structural principle of the transmission of the rack and pinion construction hoist, such as Figure 1 As shown: the front side of the rack Z1 is meshed with the driven transmission gear Z2, and the back side of the rack Z1 is usually supported by a number of backrest wheels L to constrain the rack to prevent the rack and gear from disengaging and failing.

[0003] Traditional backrest wheel structure, such as Figure 2 As shown; the main rolling element 6-1 of the backrest wheel is installed on the backrest wheel shaft 5-1 through a bearing 7-1, and rotates around the backrest wheel axis. The backrest wheel shaft 5-1 is inserted into the eccentric sleeve 4-1, and the sleeve 4-1 is inserted into the transmission frame plate 3-1. The whole set of backrest wheel assembly is fastened by standard bolts 1-1 and large pads 2-1; when adjusting the gap between the backrest wheel and the back of the rack, the adjustment can be achieved by rotating the eccentric sleeve 4-1. The mechanical model of the whole backrest wheel assembly is fixed at one end and free at the other end. The standard bolt 1-1 of this structural model is easy to loosen, and even break in serious cases, which brings the safety hazard of falling objects from high altitude.

[0004] To this end, relevant departments require elevator products to add backrest wheel covers to prevent the backrest wheels from falling. At present, many elevator backrest wheels on the market are equipped with covers to prevent the backrest wheels from falling off. For example, a Chinese patent with a publication date of September 20, 2022 and a publication number of CN307555555S discloses a design patent named "back wheel cover".

[0005] However, the cover is only used to prevent construction ash from falling in and the backrest wheel from falling off, and does not support the force of the backrest wheel. At the same time, since the shaft sleeve 4-1 of the structural model is installed behind the transmission frame plate 3-1, during daily maintenance and adjustment, people need to climb into the guide frame to operate and adjust, which is not only troublesome to operate, but also poses a safety hazard of maintenance personnel falling from a height.

[0006] In order to solve the above technical problems, a backrest wheel with two-end support structure was developed. Compared with the above structural model with one end fixed and the other end free, the backrest wheel structure adopts a two-end support method, has better mechanical properties, and can also prevent construction ash from falling in and the backrest wheel from loosening, causing falling objects from high altitude; at the same time, it is easy to assemble and disassemble, and the assemblers and maintenance personnel can directly stand on the top of the cage to adjust the gap between the backrest wheel and the rack. Utility Model Content

[0007] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a construction elevator transmission backrest wheel which has a reasonable structural design, is safe and reliable, is easy to assemble and disassemble, and adjust, prevents the backrest wheel from loosening, and has good mechanical performance.

[0008] The technical solution adopted by the utility model to solve the above-mentioned problem is: the transmission backrest wheel of the construction elevator includes a bearing, an eccentric backrest wheel shaft and a rolling element, and the rolling element is fixed on the eccentric backrest wheel shaft through a bearing. It is characterized in that it also includes a bending plate, a pressing sleeve, a transmission plate frame and an adjusting sleeve, the bending plate is installed on the transmission plate frame, the pressing sleeve is assembled on the eccentric backrest wheel shaft, the adjusting sleeve is an eccentric structure, and the adjusting sleeve is sleeved on the eccentric backrest wheel shaft.

[0009] Preferably, the utility model further comprises a positioning bolt, and the adjusting sleeve is locked and positioned by the positioning bolt when the adjusting sleeve is rotated to the target gap.

[0010] Preferably, the eccentric backrest wheel axle of the utility model comprises a threaded shaft, a step shaft one, a step shaft two and a step shaft three which are connected in sequence, wherein the step shaft one is installed with an adjusting sleeve, the step shaft two is equipped with a pressing sleeve and a rolling element, and the step shaft three cooperates with the bending plate.

[0011] Preferably, the bending plate of the utility model is welded to the transmission plate frame.

[0012] Compared with the prior art, the utility model has the following advantages and effects: (1) The overall structural design is reasonable, safe and reliable. The transmission backrest wheel adopts an end-support structure, the mechanical performance is more stable, and the backrest wheel is not easy to loosen; (2) In addition to preventing construction ash from falling into the gap between the backrest wheel and the rack, the structure can also prevent the backrest wheel from falling off during use, thereby causing a safety hazard of falling from a high altitude; (3) The backrest wheel axle and the adjustment sleeve are respectively assembled on both sides of the transmission plate frame, which is convenient for assembly, disassembly and adjustment. The assembly and maintenance personnel can directly stand on the top of the cage to adjust the gap between the backrest wheel and the back of the rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a backrest wheel in the prior art being applied to a lift.

[0014] Figure 2 It is a structural schematic diagram of a backrest wheel in the prior art.

[0015] Figure 2 Middle: backrest wheel L, rack Z1, transmission gear Z2, standard bolt 1-1, large pad 2-1, transmission frame plate 3-1, bushing 4-1, backrest wheel shaft 5-1, rolling element 6-1, bearing 7-1.

[0016] Figure 3It is a structural schematic diagram of an embodiment of the utility model.

[0017] Figure 4 It is a schematic diagram of the eccentric backrest wheel axle structure in an embodiment of the utility model.

[0018] Figure 3-Figure 4 Middle: bearing 1, eccentric backrest wheel shaft 2, rolling element 3, pressing sleeve 4, bending plate 5, transmission plate frame 6, positioning bolt 7, adjusting sleeve 8; threaded shaft 2-1, step shaft one 2-2, step shaft two 2-3, step shaft three 2-4. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0020] Example

[0021] See also Figure 3 to Figure 4 The transmission backrest wheel of the construction elevator in this embodiment includes a bearing 1, an eccentric backrest wheel shaft 2, a rolling member 3, a pressing sleeve 4, a bending plate 5, a transmission plate frame 6 and an adjusting sleeve 8. The rolling member 3 is fixed to the eccentric backrest wheel shaft 2 through the bearing 1, the pressing sleeve 4 is assembled on the eccentric backrest wheel shaft 2, and the adjusting sleeve 8 is sleeved on the eccentric backrest wheel shaft 2.

[0022] A bending plate 5 is welded on the transmission plate frame 6 in this embodiment. The bending plate has a certain thickness and can support the outer end of the eccentric backrest wheel shaft 2 to bear force, while preventing construction ash from falling in and preventing the backrest wheel from loosening.

[0023] The eccentric backrest wheel shaft 2 in this embodiment is as follows: Figure 4 As shown, the eccentric backrest wheel shaft 2 has a threaded shaft 2-1 at the leftmost end from left to right, which can be connected to the standard assembly nut; to the right is a small-diameter step shaft 2-2, on which an adjusting sleeve 8 is installed; further to the right is an eccentric large-diameter step shaft 2-3, which is equipped with a press sleeve 4 and a bearing 1, and the rightmost end is a non-eccentric maximum-diameter step shaft 3 2-4, which cooperates with the bending plate 5 on the transmission plate frame 6.

[0024] During installation, pass the eccentric backrest wheel shaft 2 from right to left (with Figure 4 Take the assembly direction as an example); pass through the bending plate 5, rolling element 3, pressing sleeve 4, and adjusting sleeve 8 in sequence, and then tighten with standard bolts.

[0025] The adjusting sleeve 8 in this embodiment is of eccentric structure, adopts multi-section stepped shaft, and is installed from the left side of the transmission plate frame 6 to the right side (the transmission plate frame 6 is installed toward the guide rail frame. When the adjusting sleeve 8 is adjusted into place, it is locked in place by the positioning bolt 7), and is sleeved on the small diameter stepped shaft 2-2 of the eccentric backrest wheel shaft; when adjusting the gap between the backrest wheel and the back side of the rack, the adjusting sleeve 8 is directly rotated, and when it is turned to the target gap, it is locked in place with the positioning bolt 7 to prevent the adjusting sleeve from rotating and loosening.

[0026] The bending plate 5 in this embodiment can prevent construction debris from falling into the space between the backrest wheel and the rack, and prevent the backrest wheel from falling off; it can also support the rightmost step shaft of the eccentric backrest wheel axle to ensure that both ends of the eccentric backrest wheel axle are supported, which greatly improves the stress condition of the backrest wheel and enhances its mechanical properties.

[0027] Since the adjusting sleeve 8 is installed from the left side of the transmission plate frame 6 (the right side of the transmission plate frame 6 is the guide rail frame), the assembly and disassembly personnel and maintenance personnel can directly adjust the gap between the backrest wheel and the back of the rack on the top of the cage.

[0028] Through the above description, those skilled in the art can already implement it.

[0029] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A transmission backrest wheel of a construction hoist, comprising a bearing (1), an eccentric backrest wheel shaft (2) and a rolling element (3), wherein the rolling element (3) is fixed to the eccentric backrest wheel shaft (2) via the bearing (1), and characterized in that: It also comprises a bending plate (5), a pressing sleeve (4), a transmission plate frame (6) and an adjusting sleeve (8), wherein the bending plate (5) is mounted on the transmission plate frame (6), the pressing sleeve (4) is mounted on the eccentric backrest wheel shaft (2), and the adjusting sleeve (8) is of an eccentric structure and is sleeved on the eccentric backrest wheel shaft (2).

2. The transmission backrest wheel of the construction hoist according to claim 1, characterized in that: It also includes a positioning bolt (7), and the adjusting sleeve (8) is locked and positioned by the positioning bolt (7) when it is rotated to a target gap.

3. The transmission backrest wheel of the construction hoist according to claim 1, characterized in that: The eccentric backrest wheel shaft (2) comprises a threaded shaft (2-1), a step shaft one (2-2), a step shaft two (2-3) and a step shaft three (2-4) which are connected in sequence; the step shaft one (2-2) is provided with an adjusting shaft sleeve (8); the step shaft two (2-3) is provided with a pressing sleeve (4) and a rolling element (3); and the step shaft three (2-4) cooperates with a bending plate (5).

4. The transmission backrest wheel of the construction hoist according to claim 1, characterized in that: The bending plate (5) is welded to the transmission plate frame (6).

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