A hoisting pulley structure

Abstract

This utility model relates to the field of hoisting operation technology and discloses a hoisting pulley structure, including: a pulley body, a connecting bearing, a wheel and axle assembly, and a fixing assembly. The pulley body has a through groove; multiple connecting bearings are spaced apart in the through groove along the axis of the pulley body; the wheel and axle assembly passes through the connecting bearings, and the outer wall of the wheel and axle assembly is in contact with the inner wall of the connecting bearing; the fixing assembly includes: a pressing member and an expanding member. Multiple sets of receiving mechanisms are spaced apart along the axial direction on the side wall of the wheel and axle assembly. Each set of receiving mechanisms includes multiple receiving grooves spaced apart along the circumference of the wheel and axle assembly. The expanding member is disposed in the receiving groove. One end of the wheel and axle assembly has a pressing groove. The pressing member is disposed in the pressing groove and abuts against one end of the expanding member. The other end of the expanding member abuts against the inner wall of the connecting bearing. This utility model effectively prevents the relative slippage between the connecting bearing and the wheel and axle assembly by pushing the expanding member with the pressing member and pressing it against the inner wall of the connecting bearing, thus ensuring the operational stability of the pulley.

Description

Technical Field

[0001] This utility model relates to the field of hoisting operation technology, and specifically to a hoisting pulley structure. Background Technology

[0002] In the repair and maintenance of large gates (such as hydraulic gates and emergency gates), it is usually necessary to disassemble and replace key components such as hydraulic cylinders and transmission mechanisms. Hydraulic cylinders, as crucial actuators for opening and closing the gate, are generally large and heavy, making safe and efficient handling and installation difficult by manual labor alone. Therefore, lifting mechanisms are essential. Pulleys are vital components in lifting mechanisms, playing a crucial role in changing the direction of force, reducing operating resistance, and stabilizing load transmission. The rationality and stability of their installation structure directly affect the efficiency and safety of gate repair and other large equipment lifting operations.

[0003] A lifting pulley is available, comprising a pulley body, a bearing, and a main shaft. The inner wall of the pulley body engages with the outer wall of the bearing, and the inner wall of the bearing engages with the outer wall of the main shaft, thereby enabling the pulley to rotate and be installed. This lifting pulley meets the requirements for lifting during the initial installation phase. However, during long-term use, relative sliding displacement easily occurs between the main shaft and the bearing under repeated stress, leading to unstable pulley operation and the pulley becoming stuck or making abnormal noises. Utility Model Content

[0004] In view of this, the present invention provides an installation structure for a hoisting pulley to solve the problem of relative slippage between the main wheel shaft and the bearing, resulting in unstable pulley operation.

[0005] In a first aspect, this utility model provides a hoisting pulley structure, comprising:

[0006] A pulley body, wherein the pulley body is provided with a through groove;

[0007] Connecting bearings, wherein multiple connecting bearings are spaced apart in the through groove along the axial direction of the pulley body;

[0008] A wheel and axle assembly, wherein the wheel and axle assembly passes through the connecting bearing, and the outer wall of the wheel and axle assembly is in contact with the inner wall of the connecting bearing;

[0009] A fixing component includes an extrusion member and an expansion member. Multiple sets of receiving mechanisms are spaced axially on the sidewall of the wheel axle assembly. Each set of receiving mechanisms includes multiple receiving grooves spaced circumferentially along the wheel axle assembly. The expansion member is disposed in one of the receiving grooves. One end of the wheel axle assembly has an extrusion groove, and the extrusion member is disposed in the extrusion groove, abutting against one end of the extrusion member. The other end of the expansion member abuts against the inner wall of the connecting bearing.

[0010] Beneficial effects

[0011] An extrusion groove communicating with the receiving groove is opened at the end of the wheel axle assembly, and an extrusion member is placed in it. Using the axial driving action of the extrusion member, one end of the expansion member is pushed out of the extrusion groove and abuts against the inner wall of the connecting bearing, converting the axial force into a limiting force. This achieves circumferential multi-point clamping between the wheel axle assembly and the connecting bearing, which can effectively prevent relative slippage and micro-movement between the connecting bearing and the wheel axle assembly, thereby improving the stability and reliability of the hoisting pulley operation.

[0012] In one optional embodiment, the wheel and axle assembly is provided with a set of receiving mechanisms at a position corresponding to the middle of the pulley body. The receiving mechanisms include two receiving grooves, and the two receiving grooves are arranged opposite to each other. The extrusion groove is arranged coaxially with the wheel and axle assembly.

[0013] Beneficial effects

[0014] Multiple sets of receiving mechanisms are set along the length of the wheel axle assembly to make the contact force distribution between the wheel axle assembly and the connecting bearing more uniform, effectively reducing the risk of local stress concentration and single-point wear between the wheel axle assembly and the connecting bearing.

[0015] In one optional embodiment, the expansion member is an expansion block, which is disposed in the receiving groove;

[0016] The extrusion component is an extrusion bolt, the extrusion groove is provided with internal threads, and the extrusion bolt is threadedly connected to the extrusion groove.

[0017] In one optional embodiment, the installation structure of the hoisting pulley further includes a snap-fit ​​mechanism, wherein two clamping end caps are respectively provided on both sides of the pulley body, and the clamping end caps also abut against the end face of the connecting bearing.

[0018] Beneficial effects

[0019] The clamping end cap is connected to the pulley body to form an axial limit on the connecting bearing, which can prevent the connecting bearing from moving axially during rotation and maintain the concentricity and stability between the wheel and axle assembly and the pulley body.

[0020] In one optional embodiment, multiple positioning holes are provided on the outer walls of both sides of the pulley body, and multiple positioning grooves are provided on the clamping end cover accordingly. The positioning bolts pass through the positioning grooves and are screwed into the positioning holes.

[0021] In one alternative embodiment, an inner hoop is provided on the side of the clamping end cap away from the pulley body, and the inner hoop is connected to the clamping end cap by an inner fixing bolt.

[0022] In one optional embodiment, the wheel and axle assembly includes: a main wheel axle, a fixed end cap, and a secondary wheel axle. The main wheel axle has a fixed end cap at one end and the secondary wheel axle at the other end, and a mounting nut is threaded onto the secondary wheel axle.

[0023] In one alternative embodiment, the fixed end cap is connected to the main wheel shaft by end bolts.

[0024] In one optional embodiment, the main wheel shaft includes a column and a carbon steel sheet, the carbon steel sheet being sleeved on the outer wall of the column, and the outer wall of the carbon steel sheet being coated with an anti-corrosion coating.

[0025] In one optional embodiment, an outer rubber ring is provided on the outer wall of the pulley body. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a hoisting pulley structure according to an embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram of the pulley body according to an embodiment of the present utility model;

[0029] Figure 3 This is a side sectional view of the expansion member and the main wheel shaft according to an embodiment of the present utility model;

[0030] Figure 4 This is a schematic diagram of the main wheel shaft in an embodiment of the present utility model.

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

[0032] 1. Pulley body; 11. Pressing end cap; 12. Positioning hole; 13. Positioning bolt; 14. Inner hoop; 15. Fixing bolt; 16. Outer rubber ring.

[0033] 2. Connecting bearings;

[0034] 31. Main wheel shaft; 311. Column; 312. Carbon steel sheet; 313. Anti-corrosion coating; 32. Fixed end cap; 33. Secondary wheel shaft; 34. Mounting nut; 35. End bolt.

[0035] 41. Extrusion part; 42. Expansion part; 43. Receiving groove; 44. Extrusion groove. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] The following is combined with Figures 1 to 4 The following describes embodiments of the present invention.

[0038] According to an embodiment of the present invention, a hoisting pulley structure is provided, comprising: a pulley body 1, a connecting bearing 2, a wheel and axle assembly, and a fixing assembly. The pulley body 1 has a through groove; multiple connecting bearings 2 are spaced apart in the through groove along the axial direction of the pulley body 1; the wheel and axle assembly passes through the connecting bearings 2, and the outer wall of the wheel and axle assembly is in contact with the inner wall of the connecting bearing 2; the fixing assembly includes: a pressing member 41 and an expanding member 42. Multiple sets of receiving mechanisms are spaced apart along the axial direction on the side wall of the wheel and axle assembly. Each set of receiving mechanisms includes multiple receiving grooves 43 spaced apart along the circumferential direction of the wheel and axle assembly. The expanding member 42 is disposed in the receiving groove 43. A pressing groove 44 is opened at one end of the wheel and axle assembly. The pressing member 41 is disposed in the pressing groove 44, and the pressing member 41 abuts against one end of the expanding member 42. The other end of the expanding member 42 abuts against the inner wall of the connecting bearing 2.

[0039] The pulley body 1 has a circular ring structure with a through groove along its axial direction. Multiple connecting bearings 2 are installed at intervals along the axial direction of the pulley body 1 within the through groove. The wheel and axle assembly passes through the pulley body 1 and the multiple connecting bearings 2, with its outer wall abutting against the inner wall of each connecting bearing 2. To ensure axial positioning and fixation of the connecting bearings 2 and the wheel and axle assembly, multiple sets of receiving mechanisms are provided on the side wall of the wheel and axle assembly. Each set of receiving mechanisms consists of several receiving grooves 43 arranged circumferentially along the side wall of the wheel and axle assembly. Each receiving groove 43 is recessed inward from the outer wall of the wheel and axle assembly and is used to place the expansion member 42. One end of the wheel and axle assembly has a pressing groove 44 machined along its length. The pressing groove 44 communicates with each receiving groove 43, allowing the pressing member 41 to be placed within the pressing groove 44 and abutting against one end of each expansion member 42. Under the action of the pressing member 41, the other end of the expansion member 42 abuts against the inner wall of the connecting bearing 2.

[0040] By driving the extruder 41 to move axially along the wheel axle assembly, the expansion member 42 is pushed out radially from the receiving groove 43 under the thrust of the extruder 41 and pressed against the inner wall of the connecting bearing 2, forming multiple points of clamping in the circumferential direction of the inner wall of the connecting bearing 2, so that a stable limiting connection is established between the wheel axle assembly and the connecting bearing 2, preventing axial slippage between the wheel axle assembly and the connecting bearing 2.

[0041] In one embodiment, the wheel and axle assembly is provided with a set of receiving mechanisms at the position of the middle part of the pulley body 1. The receiving mechanisms include two receiving grooves 43, which are arranged opposite to each other; the pressing groove 44 is arranged coaxially with the wheel and axle assembly.

[0042] Specifically, two receiving grooves 43 are arranged opposite each other along the axis of the wheel and axle assembly and are respectively opened on the outer wall of the wheel and axle assembly. The receiving groove 43 is a recessed groove structure, and an expansion member 42 is placed in the groove, with one end of the expansion member 42 facing the inner wall of the connecting bearing 2.

[0043] Meanwhile, one end of the wheel axle assembly is machined with an extrusion groove 44 along its axial direction. The extrusion groove 44 is coaxial with the wheel axle assembly and communicates with two receiving grooves 43.

[0044] In one embodiment, the wheel and axle assembly includes a main wheel axle 31, a fixed end cap 32, and a secondary wheel axle 33. One end of the main wheel axle 31 is provided with the fixed end cap 32, and the other end is provided with the secondary wheel axle 33. A mounting nut 34 is threaded onto the secondary wheel axle 33.

[0045] Specifically, the main wheel shaft 31 has a cylindrical structure with an end-connecting surface machined at one end for installation with the fixed end cover 32. The end of the fixed end cover 32 closest to the main wheel shaft 31 abuts against the connecting bearing 2, axially limiting the main wheel shaft 31. The other end of the main wheel shaft 31 is connected to the auxiliary wheel shaft 33. The end of the auxiliary wheel shaft 33 furthest from the main wheel shaft 31 has a threaded section. During assembly, the auxiliary wheel shaft 33 is installed in a fixed position, and the mounting nut 34 is tightened, thereby fixing the wheel and axle assembly. The tightening action of the mounting nut 34 ensures the overall reliability and impact resistance of the wheel and axle assembly when bearing the pulley's running load.

[0046] In one embodiment, the main wheel shaft 31 includes a column 311 and a carbon steel sheet 312, the carbon steel sheet 312 being sleeved on the outer wall of the column 311, and the outer wall of the carbon steel sheet 312 being coated with an anti-corrosion coating 313.

[0047] Specifically, the column 311 is a solid cylindrical structure, and the carbon steel sheet 312 is a ring-shaped component that is fitted onto the outer wall of the column 311 and fixedly connected to the column 311 to enhance the overall strength of the main wheel shaft 31. The outer surface of the carbon steel sheet 312 is coated with an anti-corrosion coating 313, which can be an epoxy resin coating, a spray-applied anti-rust paint, or a thermally sprayed zinc layer, and can resist the effects of humid environments and oxidation corrosion.

[0048] In one embodiment, the fixed end cap 32 is connected to the main wheel shaft 31 by end bolts 35.

[0049] Specifically, one end of the main wheel shaft 31 is machined with multiple connecting holes, and the fixed end cover 32 is correspondingly provided with multiple end screw holes, which penetrate the fixed end cover 32. The end bolts 35 are passed through the end screw holes of the fixed end cover 32 in sequence and screwed into the connecting holes of the main wheel shaft 31 to achieve a fixed connection between the fixed end cover 32 and the main wheel shaft 31.

[0050] The number of end bolts 35 can be determined according to the diameter of the end of the main wheel shaft 31 and the force requirements. They are usually arranged symmetrically to ensure the concentricity and uniform force of the connection between the main wheel shaft 31 and the fixed end cover 32.

[0051] In one embodiment, the expansion member 42 is an expansion block, which is disposed in the receiving groove 43;

[0052] The extrusion component 41 is an extrusion bolt, and the extrusion groove 44 is provided with internal threads. The extrusion bolt is threadedly connected to the extrusion groove 44.

[0053] Specifically, the extended rubber blocks are made of wear-resistant rubber or polyurethane, and multiple extended rubber blocks are placed in the receiving groove 43 on the outer wall of the main wheel shaft 31, with one end facing the inner wall of the connecting bearing 2. The extrusion member 41 is an extrusion bolt, which is installed in the extrusion groove 44 along the axial direction of the wheel shaft assembly.

[0054] The expansion blocks are distributed in each receiving groove 43, and multiple expansion blocks can be placed in each receiving groove 43. The extrusion bolt is inserted into the extrusion groove 44 from the end of the auxiliary wheel shaft 33 and abuts against one end of each expansion block. As the extrusion bolt is screwed in axially along the main wheel shaft 31, the bolt head generates an axial thrust on the expansion block, causing the other end of the expansion block to gradually protrude outward from the receiving groove 43 and press tightly against the inner wall of the connecting bearing 2, forming a reliable limiting fixation.

[0055] In one embodiment, two clamping end caps 11 are respectively provided on both sides of the pulley body 1, and the clamping end caps 11 also abut against the end face of the connecting bearing 2.

[0056] Two clamping end caps 11 are detachably connected to both ends of the pulley body 1. During the assembly process, multiple connecting bearings 2 are first installed in the through groove of the pulley body 1 in sequence at intervals, and then the clamping end caps 11 are fixed to both ends of the pulley body 1 so that the inner side of the clamping end caps 11 abuts against the end face of the connecting bearing 2, thereby axially limiting the connecting bearing 2.

[0057] In one embodiment, multiple positioning holes 12 are provided on the outer walls of both sides of the pulley body 1, and multiple positioning grooves are provided on the pressing end cap 11. The positioning bolts 13 pass through the positioning grooves and are screwed into the positioning holes 12.

[0058] Specifically, multiple positioning holes 12 are provided on the outer walls of both ends of the pulley body 1, and multiple positioning grooves are correspondingly provided on the clamping end cover 11. During assembly, the clamping end cover 11 is fitted onto the end face of the pulley body 1, with its positioning grooves corresponding one-to-one with the positioning holes 12 on the pulley body 1. Subsequently, positioning bolts 13 are passed through the positioning grooves and screwed into the corresponding positioning holes 12 in sequence, thereby achieving a fixed connection between the clamping end cover 11 and the pulley body 1. The positioning bolts 13 can prevent the clamping end cover 11 from shifting or loosening when subjected to vibration and impact, further ensuring the stability and operational reliability of the connecting bearing 2 within the pulley body 1.

[0059] In one embodiment, an inner hoop 14 is provided on the side of the clamping end cap 11 away from the pulley body 1, and the inner hoop 14 is connected to the clamping end cap 11 by an inner fixing bolt 15.

[0060] Specifically, the inner hoop 14 is an annular structure, and its inner diameter matches the outer diameter of the connecting bearing 2. After the pressing end cover 11 is fixed to the end of the pulley body 1, the inner hoop 14 can circumferentially cover and press against the pressing end cover 11 to seal the main wheel shaft 31.

[0061] The connecting bearing 2 is first placed in the through groove of the pulley body 1. The pressing end cover 11 is positioned on both sides of the pulley body 1 and is connected and fixed to the pulley body 1 by the positioning bolt 13. The inner hoop 14 is fastened to the pressing end cover 11 by the inner fixing bolt 15, so that the inner hoop 14 forms a clamping force on the pressing end cover 11.

[0062] In one embodiment, an outer rubber ring 16 is provided on the outer wall of the pulley body 1.

[0063] Specifically, the outer rubber ring 16 is an annular component, the inner diameter of which matches the outer diameter of the pulley body 1, and it is fixed to the outer wall of the pulley body 1. The material of the outer rubber ring 16 can be wear-resistant rubber or polyurethane to ensure that the pulley body 1 has good wear resistance and elasticity during long-term rotation.

[0064] Assembly steps: First, place multiple connecting bearings 2 sequentially into the through grooves of the pulley body 1, arranging them at intervals along the axial direction of the pulley body 1 and fitting them against the through grooves. Then, insert the wheel and axle assembly through one end of the pulley body 1, ensuring its outer wall fits against the inner wall of each connecting bearing 2. Next, install clamping end caps 11 on both sides of the pulley body 1, and reliably lock the clamping end caps 11 to the positioning holes 12 of the pulley body 1 using positioning bolts 13, enabling the clamping end caps 11 to axially limit the connecting bearings 2. The inner ring 14 is connected to the end caps via inner fixing bolts 15, sealing the outer ends of the wheel and axle assembly.

[0065] After installation, the extrusion member 41 is inserted into the extrusion groove 44, and the end of the extrusion member 41 abuts against the proximal end of each expansion member 42. Under the extrusion force of the expansion member 42, the expansion member 42 extends out of the receiving groove 43 and presses against the inner wall of the connecting bearing 2, forming multiple points of clamping on the inner wall of the connecting bearing 2, thereby achieving stable positioning between the wheel axle assembly and the connecting bearing 2.

[0066] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A hoisting pulley arrangement, characterized in that include: The pulley body (1) has a through groove. Connecting bearings (2), a plurality of connecting bearings (2) are spaced apart in the through groove along the axial direction of the pulley body (1); A wheel and axle assembly, wherein the wheel and axle assembly passes through the connecting bearing (2), and the outer wall of the wheel and axle assembly is in contact with the inner wall of the connecting bearing (2); The fixing component includes an extrusion member (41) and an expansion member (42). Multiple sets of receiving mechanisms are spaced along the axial direction on the side wall of the wheel axle assembly. Each set of receiving mechanisms includes multiple receiving grooves (43) spaced along the circumference of the wheel axle assembly. The expansion member (42) is disposed in the receiving groove (43). An extrusion groove (44) is opened at one end of the wheel axle assembly. The extrusion member (41) is disposed in the extrusion groove (44). The extrusion member (41) abuts against one end of the expansion member (42). The other end of the expansion member (42) abuts against the inner wall of the connecting bearing (2).

2. The hoist pulley arrangement of claim 1, wherein, The wheel and axle assembly is provided with a set of receiving mechanisms at the position of the middle part of the pulley body (1). The receiving mechanism includes two receiving grooves (43) and the two receiving grooves (43) are arranged opposite to each other; the extrusion groove (44) is arranged coaxially with the wheel and axle assembly.

3. The hoist pulley arrangement of claim 2, wherein, The expansion member (42) is an expansion block, which is disposed in the receiving groove (43). The extrusion member (41) is an extrusion bolt, the extrusion groove (44) is provided with internal threads, and the extrusion bolt is threadedly connected to the extrusion groove (44).

4. The hoist pulley arrangement of claim 1, wherein, Two clamping end caps (11) are respectively provided on both sides of the pulley body (1), and the clamping end caps (11) also abut against the end face of the connecting bearing (2).

5. The hoist pulley arrangement of claim 4, wherein, Multiple positioning holes (12) are provided on the outer walls of both sides of the pulley body (1), and multiple positioning grooves are provided on the clamping end cap (11) accordingly. The positioning bolt (13) passes through the positioning groove and is screwed into the positioning hole (12).

6. The hoist pulley arrangement of claim 4, wherein, An inner hoop (14) is provided on the side of the clamping end cap (11) away from the pulley body (1), and the inner hoop (14) is connected to the clamping end cap (11) by an inner fixing bolt (15).

7. The hoisting pulley structure according to claim 1, characterized in that, The wheel and axle assembly includes a main wheel axle (31), a fixed end cap (32), and a secondary wheel axle (33). One end of the main wheel axle (31) is provided with a fixed end cap (32), and the other end is provided with the secondary wheel axle (33). A mounting nut (34) is threaded onto the secondary wheel axle (33).

8. The hoisting pulley structure according to claim 7, characterized in that, The fixed end cap (32) is connected to the main wheel shaft (31) by end bolts (35).

9. The hoisting pulley structure according to claim 7, characterized in that, The main wheel shaft (31) includes a column (311) and a carbon steel sheet (312). The carbon steel sheet (312) is sleeved on the outer wall of the column (311), and the outer wall of the carbon steel sheet (312) is coated with an anti-corrosion coating (313).

10. The hoisting pulley structure according to claim 1, characterized in that, An outer rubber ring (16) is provided on the outer wall of the pulley body (1).

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