Large-torque torque multiplication system and torque wrench special for coal mining machine

Abstract

The utility model discloses a large-torque torque multiplication system and a special torque wrench for a coal mining machine, the coal mining machine comprises a rocker arm and a planet head fixed at the end part of the rocker arm through a plurality of bolt and nut components, and a nut is positioned in an inwards sunken accommodating groove of the rocker arm along the central axis direction of the planet head; the opening direction of the containing groove is perpendicular to the direction of the center shaft, and the large-torque torque multiplication system comprises a transition plate which is matched with the containing groove, one end of the transition plate is provided with a matching structure matched with a nut, and the other end of the transition plate is provided with a connecting hole connected with a square head of a torque wrench in a matched mode. By additionally arranging the transition plate, one end of the transition plate is fixed to the nut, the other end of the transition plate is matched with an existing torque wrench, torque multiplication can be achieved, the problem that in the prior art, due to the torque upper limit, the using scene of a torque wrench for a coal mining machine is limited is solved, resources are saved, and cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mining machines, and in particular relates to a large torque moment multiplication system and a special torque wrench for coal mining machines comprising the large torque moment multiplication system. Background Art

[0002] A torque wrench is also called a torque wrench or an adjustable torque wrench. It is a type of wrench. Any torque wrench of any specification will have a torque upper limit value set. If the torque upper limit of this specification is exceeded, a higher level needs to be replaced to meet the work requirements.

[0003] Coal mining machines have become widely used mining tools. They mainly include a rocker arm and a planetary head fixed to the end of the rocker arm. The planetary head is fixed to the outer shell of the rocker arm end through multiple bolt and nut assemblies. Multiple receiving grooves are recessed inward on the outer peripheral side wall to accommodate the bolt and nut assemblies. This results in a relatively narrow accommodation space for the nut assembly, and a torque wrench operated by manpower is required for tightening or disassembly during assembly and disassembly.

[0004] Furthermore, when the size of the coal mining machine is larger, the size of the bolt and nut assembly will inevitably need to be increased, resulting in an increase in the required tightening torque, and the existing torque wrench will not be able to meet the conditions. If a new torque wrench is replaced, on the one hand, the cost will increase, and on the other hand, the original torque wrench is already applicable to most production scenarios, and replacing the new torque wrench will result in a waste of resources. Utility Model Content

[0005] The utility model is developed to solve the above-mentioned problems, and its purpose is to provide a large torque moment multiplication system and a special torque wrench for coal mining machines including the large torque moment multiplication system, which solves the problem that the torque wrench used for coal mining machines in the prior art is limited in use scenarios due to the torque upper limit, and realizes torque multiplication without replacing the current torque wrench, saving resources and reducing costs.

[0006] The utility model provides a large torque moment multiplication system, which is used for disassembling and assembling bolt and nut assemblies on a coal mining machine, and is connected to a torque wrench matched with the coal mining machine, and is used for multiplying the torque of the torque wrench. The coal mining machine includes a rocker arm and a planetary head fixed to the end of the rocker arm through a plurality of bolt and nut assemblies, and the nut is located in a receiving groove of the rocker arm that is recessed inwardly along the central axis direction of the planetary head, and the opening direction of the receiving groove is perpendicular to the central axis direction. The large torque moment multiplication system includes:

[0007] The transition plate is matched with the accommodating groove, has a matching structure matched with the nut at one end, and has a connecting hole matched with the square head of the torque wrench at the other end.

[0008] Preferably, the transition plate is extended along the length direction of the torque wrench, and the matching structure and / or the connecting hole are arranged at corresponding end positions in the plane of the transition plate.

[0009] Preferably, the connecting hole is square and is sleeved on the square head; and / or, there is a clearance fit between the connecting hole and the square head.

[0010] Preferably, the dimension of the matching structure in the thickness direction is smaller than the height of the accommodating groove, or the thickness of the matching structure is matched with the nut.

[0011] Preferably, the matching structure is a hexagonal hole provided in the end region of the transition plate or an open slot with an opening toward the nut, and two side walls of the open slot fit with corresponding side walls of the nut.

[0012] Preferably, the length of the transition plate is set in direct proportion to the lever arm size of the torque wrench.

[0013] Preferably, the length of the transition plate is adjustable.

[0014] In addition, the utility model also provides a special torque wrench for coal mining machines, which is used for disassembling and assembling bolt and nut assemblies on coal mining machines. The coal mining machine includes a rocker arm and a planetary head fixed to the end of the rocker arm by multiple bolt and nut assemblies. The bolt is located in an inwardly recessed receiving groove of the rocker arm along the central axis direction of the planetary head. The opening direction of the receiving groove is perpendicular to the central axis direction. The special torque wrench for coal mining machines includes the high torque multiplication system described in any of the above-mentioned schemes.

[0015] According to the large torque multiplication system and the torque wrench dedicated to coal mining machines involved in the utility model, by analyzing the torque composition, it is found that the torque is composed of force and lever arm. Adjusting the lever arm becomes a possible way to quickly achieve torque multiplication without replacing the existing torque wrench. For the torque wrench specially used on the coal mining machine to act on the nut that fixes the planetary head, when a torque exceeding the torque range of the existing torque wrench is required, torque multiplication can be achieved by adding a transition plate so that one end of it is fixed to the nut and the other end is matched with the existing torque wrench, thereby solving the problem of limited usage scenarios of the torque wrench used for coal mining machines in the prior art due to the torque upper limit, saving resources and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the local structure of the planetary head of the coal mining machine in the embodiment of the utility model.

[0017] Figure 2 It is a structural schematic diagram of a torque wrench used in an existing coal mining machine in an embodiment of the utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the large torque multiplication system in the embodiment of the utility model. Figure 1 .

[0019] Figure 4 This is a schematic diagram of the structure of the large torque multiplication system in the embodiment of the utility model. Figure 2 .

[0020] Figure 5 It is a structural schematic diagram of a torque wrench dedicated to coal mining machines in an embodiment of the utility model. DETAILED DESCRIPTION

[0021] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0022] <Example>

[0023] like Figure 1 As shown, the coal mining machine is a mining tool. The coal mining machine 200 actually used includes a rocker arm 210 and a planetary head 230 fixed to the end of the rocker arm 210 by a plurality of bolt and nut 220 assemblies. The bolt and nut assembly 220 includes bolts 221 and nuts 222 used in pairs. The nut 222 is located in a receiving groove 211 that is recessed inwardly of the rocker arm 210 along the central axis direction of the planetary head 230. The opening direction of the receiving groove 211 (arrow X) is perpendicular to the central axis direction (arrow Y).

[0024] like Figure 2 As shown, due to the limited space of the receiving groove 211, the torque wrench 300, which is a widely used tool for disassembling and assembling the nut 222 of the coal mining machine 200, needs to be manually operated.

[0025] However, in special scenarios, due to the increased specifications of the nut 222, the existing torque wrench 300 cannot meet the existing torque requirements; generally, a torque wrench with a larger torque range can only be replaced to disassemble and assemble the nut 222, resulting in a huge waste of existing resources.

[0026] For the above scenario, if Figures 3 to 5 As shown, this embodiment discloses a high torque moment multiplication system 100, which is used for disassembling and assembling a bolt and nut assembly 220 on a coal mining machine 200, and is connected to a torque wrench 300 matched with the coal mining machine to multiply the torque of the torque wrench 300. The high torque moment multiplication system 100 includes a transition plate 10.

[0027] like Figure 1 and Figure 3As shown, the transition plate 10 is matched with the accommodating groove 211, one end of which has a matching structure 11 adapted to the nut 222, and the other end has a connecting hole 12 matched with the square head 310 of the torque wrench 300; thereby connecting the nut 222 and the torque wrench 300, extending the lever arm and doubling the torque.

[0028] According to the large torque multiplication system involved in this embodiment, by analyzing the torque composition, it is found that the torque is composed of force and lever arm. Adjusting the lever arm without replacing the existing torque wrench becomes a possible way to quickly achieve torque multiplication; for the torque wrench specially used on the coal mining machine to act on the nut that fixes the planetary head, when a torque exceeding the torque range of the existing torque wrench is required, torque multiplication can be achieved by adding a transition plate so that one end of it is fixed to the nut and the other end is matched with the existing torque wrench, thereby solving the problem of limited usage scenarios of the torque wrench used in coal mining machines in the prior art due to the torque upper limit, saving resources and reducing costs.

[0029] In a specific embodiment, the transition plate 10 is extended along the length direction of the torque wrench 300, and the matching structure 11 and / or the connecting hole 12 are arranged at the corresponding end position in the plane of the transition plate 10, thereby simplifying and smoothing the structure of the transition plate 10, and no other protruding structures are added in its plane, which is convenient for use with the accommodating groove 211.

[0030] In another specific embodiment, the connecting hole 12 is square and is sleeved on the square head of the torque wrench 300; and / or, there is a clearance fit between the connecting hole 12 and the square head 310. Thus, the transition plate 10 and the torque wrench 300 are more firmly connected to form an integral structure, which is convenient for torque transmission.

[0031] In another specific embodiment, the thickness dimension of the matching structure 11 is smaller than the height of the receiving groove 211, or the thickness of the matching structure 11 is adapted to the nut 222. Thus, the transition plate 10 and the nut 222 are more firmly connected as an integral structure, which is convenient for torque transmission.

[0032] In another specific embodiment, Figure 3 and Figure 4 As shown, the matching structure 11 is a hexagonal hole provided in the end region of the transition plate 10 or an open slot with an opening toward the nut 222, and the two side walls of the open slot fit with the corresponding side walls of the nut 222. It is matched and connected with the nut 222 in various ways.

[0033] In another specific embodiment, the length of the transition plate 10 can be adjusted to match the multiplication of different torque ranges. Specifically, the length of the transition plate 10 is proportional to the arm size of the torque wrench 300. The longer the length of the transition plate 10, the larger the torque multiplication range achieved.

[0034] In addition, if Figure 5 As shown, this embodiment also provides a torque wrench 400 for coal mining machines, which includes an existing torque wrench 300 and a high torque multiplication system 100 of any structure in the above embodiments, to achieve torque multiplication of the existing torque wrench 300.

[0035] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A high torque moment multiplication system, used for disassembling and assembling bolt and nut assemblies on a coal mining machine, which is connected to a torque wrench matched with the coal mining machine and is used to multiply the torque of the torque wrench. The coal mining machine includes a rocker arm and a planetary head fixed to the end of the rocker arm through a plurality of the bolt and nut assemblies. The nut is located in a receiving groove recessed inwardly of the rocker arm along the central axis direction of the planetary head. The opening direction of the receiving groove is perpendicular to the central axis direction. It is characterized in that: The high torque moment multiplication system comprises: The transition plate is matched with the accommodating groove, has a matching structure matched with the nut at one end, and has a connecting hole matched with the square head of the torque wrench at the other end.

2. The high torque multiplication system according to claim 1, characterized in that: The transition plate is extended along the length direction of the torque wrench, and the matching structure and / or the connecting hole are arranged at corresponding end positions in the plane of the transition plate.

3. The high torque multiplication system according to claim 1, characterized in that: The connecting hole is square and is sleeved on the square head; and / or, there is a clearance fit between the connecting hole and the square head.

4. The high torque multiplication system according to claim 1, characterized in that: The dimension of the matching structure in the thickness direction is smaller than the height of the accommodating groove, or the thickness of the matching structure is matched with the nut.

5. The high torque multiplication system according to claim 1, characterized in that: The matching structure is a hexagonal hole provided in the end region of the transition plate or an open slot with an opening toward the nut, and two side walls of the open slot are in contact with corresponding side walls of the nut.

6. The high torque multiplication system according to claim 1, characterized in that: The length of the transition plate is set in direct proportion to the magnitude of the force arm of the torque wrench.

7. The high torque multiplication system according to claim 1, characterized in that: The length of the transition plate can be adjusted.

8. A torque wrench for coal mining machine, used for disassembling and assembling bolt and nut assemblies on coal mining machine, wherein the coal mining machine comprises a rocker arm and a planetary head fixed to the end of the rocker arm by a plurality of the bolt and nut assemblies, wherein the bolt is located in a receiving groove recessed inwardly of the rocker arm along the central axis direction of the planetary head, and the opening direction of the receiving groove is perpendicular to the central axis direction, and is characterized in that: The special torque wrench for coal mining machines includes a high torque multiplication system as described in any one of claims 1 to 7 above.

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