Auxiliary forcing device for fastening bolt

Abstract

The utility model discloses an auxiliary forcing device for fastening a bolt, which comprises a gear set, a driving rod and a driven rod, the gear set comprises a gear box, a driving gear and a driven gear which can rotate and are meshed with each other are arranged in the gear box, and the central axis of the driving gear intersects with the central axis of the driven gear; one end of the driving rod is fixedly connected with the driving gear so that the driving rod can synchronously rotate relative to the gearbox along with the driving gear, and the other end of the driving rod extends out of the gearbox to be matched with and connected with a torque wrench. One end of the driven rod is fixedly connected with the driven gear so that the driven rod can synchronously rotate relative to the gear box along with the driven gear, and the other end of the driven rod extends out of the gear box to be matched with and connected with a bolt. The torque wrench is used for applying proper torque to the driving rod, so that the bolt is mounted and the torque value of bolt mounting is controlled by the driven rod at the proper torque through transmission of the driving gear and the driven gear, and the mounting quality of the bolt is ensured, so that the excavator can work normally.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary tools, in particular to an auxiliary force - adding device for fastening bolts. Background Art

[0002] As a kind of construction machinery widely used in roads, mining, and infrastructure construction, excavators have sufficient market demand. This not only promotes the development of excavator manufacturing enterprises but also prompts the market to continuously emerge with excavator products of superior performance. The entire excavator industry presents a posture of a hundred schools of thought contending and a hundred flowers blooming.

[0003] As the king of construction machinery, excavators are commonly used in extreme working conditions, which have extremely high requirements for the overall quality of excavators. Even the loosening of a single bolt in a certain part may lead to the paralysis of the entire machine, which can be described as affecting the whole by pulling one hair. Therefore, when assembling bolts of excavators, a torque confirmation device such as a torque wrench is generally used to confirm the torque value of bolt installation. However, for positions with limited space, such as the connection between adjacent steel pipes of the working device of an excavator through flange pressing bolts, due to space limitations, it is impossible to directly use a torque wrench to install bolts, resulting in the torque of bolt installation being out of control. There is a possibility that insufficient torque may cause bolt loosening and oil leakage, or excessive torque may damage the bolt, leading to the excavator being unable to operate normally. Summary of the Utility Model

[0004] In order to overcome at least one of the above - mentioned defects of the prior art, the purpose of the utility model is to provide an auxiliary force - adding device for fastening bolts to assist the torque wrench in installing bolts, thereby controlling the torque value of bolt installation, ensuring the installation quality of bolts, and enabling the excavator to operate normally.

[0005] The technical solution adopted by the utility model to solve its problems is as follows:

[0006] An auxiliary force - adding device for fastening bolts, comprising:

[0007] A gear set, the gear set includes a gearbox, and the gearbox is provided with a rotatable and meshing driving gear and a driven gear, and the central axes of the driving gear and the driven gear intersect;

[0008] A driving rod, one end of the driving rod is fixedly connected to the driving gear so that the driving rod rotates synchronously with the driving gear relative to the gearbox, and the other end of the driving rod extends out of the gearbox for adapting to and connecting a torque wrench;

[0009] A driven rod, one end of the driven rod is fixedly connected to the driven gear so that the driven rod rotates synchronously with the driven gear relative to the gearbox, and the other end of the driven rod extends out of the gearbox for adapting to and connecting a bolt.

[0010] Further, both the driving rod and the driven rod are installed in the gearbox through bearings. Bearings are sleeved on the outer peripheries of the driving rod and the driven rod, and the bearings are rotatably installed in the gearbox.

[0011] Further, the gearbox is provided with fitting mounting grooves corresponding to the bearings, and the bearings are rotatably installed in the corresponding mounting grooves.

[0012] Further, the driving gear is provided with a first sleeve, and the first sleeve is fixedly sleeved on the outer periphery of one end of the driving rod;

[0013] The driven gear is provided with a second sleeve, and the second sleeve is fixedly sleeved on the outer periphery of one end of the driven rod.

[0014] Further, a first limiting block is provided on the side wall of one end of the driving rod, and a first limiting groove adapted to the first limiting block is opened on the inner wall of the first sleeve. In the assembled state, the first limiting block is clamped in the first limiting groove;

[0015] A second limiting block is provided on the side wall of one end of the driven rod, and a second limiting groove adapted to the second limiting block is opened on the inner wall of the second sleeve. In the assembled state, the second limiting block is clamped in the second limiting groove.

[0016] Further, the first limiting groove axially penetrates through the first sleeve, and the second limiting groove axially penetrates through the second sleeve. When assembling, the first limiting block is axially slidably arranged in the first limiting groove and the second limiting block is axially slidably arranged in the second limiting groove.

[0017] Further, a first fixing groove adapted to the first limiting block is opened on the side wall of one end of the driving rod, and a second fixing groove adapted to the second limiting block is opened on the side wall of one end of the driven rod. In the assembled state, the first limiting block is clamped in the first fixing groove and the second limiting block is clamped in the second fixing groove.

[0018] Further, the central axes of the driving gear and the driven gear are perpendicular.

[0019] Further, the gearbox includes a first housing and a second housing. The first housing and the second housing are buckled and detachably connected to form a receiving cavity. One end of the driving gear, the driven gear, the driving rod and the driven rod are all arranged in the receiving cavity.

[0020] Further, the driving gear, the driven gear, the driving rod and the driven rod are all spaced from the inner wall of the gearbox.

[0021] The beneficial effects of the auxiliary force - adding device for fastening bolts provided by the present utility model are as follows:

[0022] 1) By fixedly connecting the driving gear to the driving rod, the driven gear to the driven rod, and meshing the driving gear with the driven gear, a suitable torque can be applied to the driving rod using a torque wrench. Thus, through the transmission of the driving gear and the driven gear, the bolt can be installed with a suitable torque by means of the driven rod. In this way, in the case of limited space, this auxiliary force - increasing device can be used to assist the torque wrench in installing the bolt, thereby controlling the torque value of the bolt installation, ensuring the installation quality of the bolt, and enabling the excavator to operate normally.

[0023] 2) The intersection of the central axes of the driving gear and the driven gear, as well as the cooperation between the driving rod and the driven rod, not only extends the operation position outwards and expands it in the case of a narrow space, but also changes the operation angle, which is more conducive to the rapid installation of bolts, can greatly improve the efficiency of bolt installation, and reduce the time cost. Moreover, this auxiliary force - increasing device has the characteristics of simple structure and convenient processing, and the production cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural view of the auxiliary force - increasing device of the present utility model;

[0025] Figure 2 is a partial exploded view of the auxiliary force - increasing device of the present utility model;

[0026] Figure 3 is a schematic structural view of the auxiliary force - increasing device of the present utility model with the gearbox removed;

[0027] Figure 4 is an exploded view of the auxiliary force - increasing device of the present utility model with the gearbox removed.

[0028] Among them, the meanings of the reference numerals are as follows:

[0029] 1. Gearbox; 11. Installation groove; 12. First housing; 13. Second housing; 14. Accommodation groove; 2. Driving gear; 21. First sleeve; 22. First limiting groove; 3. Driven gear; 31. Second sleeve; 32. Second limiting groove; 4. Driving rod; 41. First limiting block; 42. First fixing groove; 43. Hexagonal groove; 5. Driven rod; 51. Second limiting block; 52. Second limiting groove; 53. Hexagonal plug; 6. Bearing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used herein in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0033] Refer to Figure 1 and Figure 2 , the present utility model provides an auxiliary force - adding device for a fastening bolt, which includes a gear set, a driving rod 4 and a driven rod 5. Among them, the gear set includes a gear box 1. Inside the gear box 1, there are a driving gear 2 and a driven gear 3 that are rotatable and meshed with each other. The central axes of the driving gear 2 and the driven gear 3 intersect. One end of the driving rod 4 is fixedly connected to the driving gear 2 so that the driving rod 4 rotates synchronously with the driving gear 2 relative to the gear box 1, and the other end of the driving rod 4 extends out of the gear box 1 for adapting to and connecting a torque wrench. One end of the driven rod 5 is fixedly connected to the driven gear 3 so that the driven rod 5 rotates synchronously with the driven gear 3 relative to the gear box 1, and the other end of the driven rod 5 extends out of the gear box 1 for adapting to and connecting a bolt.

[0034] Both the driving gear 2 and the driven gear 3 are bevel gears, and they are meshed. Moreover, the central axis of the driving gear 2 intersects with the central axis of the driven gear 3, such that the driving gear 2 and the driven gear 3 are not arranged side - by - side and parallel. As a result, the driving rod 4 fixedly connected to the driving gear 2 and the driven rod 5 fixedly connected to the driven gear 3 are not arranged side - by - side and parallel, but the included angle between the extension lines of the driving rod 4 and the driven rod 5 is less than 180°.

[0035] Thus, when this auxiliary boosting device is used to assist a torque wrench in tightening a bolt, taking an internal hexagon bolt as an example, the corresponding torque wrench is a hexagon torque wrench. The other end of the driven rod 5 is provided with a hexagon plug 53 adapted to the internal hexagon bolt, and the other end of the driving rod 4 is provided with a hexagon groove 43 adapted to the torque wrench. Connect the hexagon plug 53 to the internal hexagon bolt and the torque wrench to the hexagon groove 43, and then use the torque wrench to turn the driving rod 4 with an appropriate torque, so that the bolt can be turned and the torque can be controlled through this auxiliary boosting device. Moreover, since the included angle between the extension lines of the driving rod 4 and the driven rod 5 is less than 180°, the working position of the torque wrench for installing the bolt is led outwards and expanded, and at the same time, the working angle of the torque wrench is changed, which is more convenient for installing the bolt.

[0036] Therefore, in the present utility model, by fixedly connecting the driving gear 2 to the driving rod 4, fixedly connecting the driven gear 3 to the driven rod 5, and meshingly connecting the driving gear 2 and the driven gear 3, an appropriate torque can be applied to the driving rod 4 by using a torque wrench, and thus through the transmission of the driving gear 2 and the driven gear 3, the bolt can be installed with an appropriate torque by means of the driven rod 5. In this way, in the case of limited space, this auxiliary boosting device can be used to assist the torque wrench in installing the bolt, so as to control the torque value of the bolt installation, ensure the installation quality of the bolt, and enable the excavator to operate normally. At the same time, the intersection of the central axes of the driving gear 2 and the driven gear 3, as well as the cooperation of the driving rod 4 and the driven rod 5, not only lead out and expand the working position outwards in the case of a narrow space, but also change the working angle, which is more conducive to the rapid installation of the bolt, can greatly improve the installation efficiency of the bolt, and reduce the time cost. Moreover, this auxiliary boosting device has the characteristics of simple structure and convenient processing, and the production cost is relatively low.

[0037] Furthermore, the central axes of the driving gear 2 and the driven gear 3 are perpendicular to each other. That is, the extension lines of the driving rod 4 and the driven rod 5 are perpendicularly arranged, so that the working angle is converted by 90°, and the inconvenient horizontal operation can be directly converted into the convenient vertical operation, which greatly reduces the difficulty of bolt installation, is conducive to further improving the installation efficiency of the bolt, and reduces the time cost.

[0038] It should be noted that the above is only an illustration taking the internal hexagon bolt as an example, and it is not that the auxiliary boosting device of the present utility model is limited to the internal hexagon bolt, but it is applicable to bolts of any shape, and only the driving rod 4 and the driven rod 5 of appropriate adaptation need to be replaced.

[0039] To facilitate the replacement of the driving rod 4 and the driven rod 5, the gearbox 1 includes a first housing 12 and a second housing 13. The first housing 12 and the second housing 13 are buckled with each other and detachably connected to form a receiving cavity 14. One end of the driving gear 2, the driven gear 3, the driving rod 4, and one end of the driven rod 5 are all arranged in the receiving cavity 14. In this way, when it is necessary to replace the driving rod 4 and the driven rod 5, the disassembly and assembly of the gearbox 1 can be quickly completed.

[0040] The first housing 12 and the second housing 13 can be connected by bolts, or the first housing 12 and the second housing 13 can be connected by a clamping structure of a clamping protrusion and a clamping groove. No matter which detachable connection structure is used, it is necessary to ensure the stability of the installation of the first housing 12 and the second housing 13 to prevent loosening during operation and affecting the installation quality of the bolts.

[0041] On this basis, the driving gear 2 can be directly sleeved on the outer periphery of the radial direction of one end of the driving rod 4, and the driven gear 3 can be directly sleeved on the outer periphery of the radial direction of one end of the driven rod 5. In this structure, the contact area between the driving gear 2 and the driving rod 4 and the contact area between the driven gear 3 and the driven rod 5 are relatively small. As the use time increases, the driving gear 2 is likely to fall off from the driving rod 4, and the driven gear 3 is likely to fall off from the driven rod 5, affecting the smooth progress of the operation.

[0042] Therefore, referring to Figure 3 and Figure 4 , the driving gear 2 is provided with a first sleeve 21, and the first sleeve 21 is fixedly sleeved on the outer periphery of the radial direction of one end of the driving rod 4. The driven gear 3 is provided with a second sleeve 31, and the second sleeve 31 is fixedly sleeved on the outer periphery of the radial direction of one end of the driven rod 5. The first sleeve 21 is fixedly arranged on the side of the driving gear 2 axially away from the driven gear 3. The first sleeve 21 has a large contact area with the driving rod 4, which can ensure the stable connection between the driving gear 2 and the driving rod 4. The second sleeve 31 is fixedly arranged on the side of the driven gear 3 axially away from the driving gear 2. The second sleeve 31 has a large contact area with the driven rod 5, which can ensure the stable connection between the driven gear 3 and the driven rod 5.

[0043] Furthermore, a first limiting block 41 is provided on the side wall of one end of the driving rod 4, and a first limiting groove 22 adapted to the first limiting block 41 is opened on the inner wall of the first sleeve 21. In the assembled state, the first limiting block 41 is clamped in the first limiting groove 22. A second limiting block 51 is provided on the side wall of one end of the driven rod 5, and a second limiting groove 32 adapted to the second limiting block 51 is opened on the inner wall of the second sleeve 31. In the assembled state, the second limiting block 51 is clamped in the second limiting groove 32. The cooperation between the first limiting block 41 and the first limiting groove 22 makes the connection between the driving rod 4 and the driving gear 2 more stable, and the cooperation between the second limiting block 51 and the second limiting groove 32 makes the connection between the driven rod 5 and the driven gear 3 more stable.

[0044] Since there is a pulling process when replacing the driving rod 4 and the driven rod 5, the first limiting groove 22 axially penetrates through the first sleeve 21, and the second limiting groove 32 axially penetrates through the second sleeve 31. During assembly, the first limiting block 41 is axially slidably arranged in the first limiting groove 22 and the second limiting block 51 is axially slidably arranged in the second limiting groove 32. In this way, when replacing the driving rod 4, the first limiting block 41 can axially slide along the first limiting groove 22 to facilitate the disassembly and assembly of the driving rod 4. When replacing the driven rod 5, the second limiting block 51 can axially slide along the second limiting groove 32 to facilitate the disassembly and assembly of the driven rod 5. Moreover, the lengths of the driving rod 4 and the driven rod 5 extending out of the gearbox 1 can be adjusted within a certain range, so as to increase the application scenarios of the auxiliary force adding device to a certain extent.

[0045] The first limiting block 41 and the driving rod 4 can be of an integral structure, and the second limiting block 51 and the driven rod 5 can be of an integral structure. In this way, each type of driving rod 4 needs to be provided with a first limiting block 41, and each type of driven rod 5 needs to be provided with a second limiting block 51, which increases the processing difficulty of the driving rod 4 and the driven rod 5 and improves the material cost.

[0046] Therefore, a first fixing groove 42 adapted to the first limiting block 41 is formed in the side wall of one end of the driving rod 4, and a second fixing groove 52 adapted to the second limiting block 51 is formed in the side wall of one end of the driven rod 5. In the assembled state, the first limiting block 41 is clamped in the first fixing groove 42 and the second limiting block 51 is clamped in the second fixing groove 52. When the first limiting block 41 is fixed in the first fixing groove 42, the first limiting block 41 protrudes from the side wall of one end of the driving rod 4 so as to be able to be clamped in the first limiting groove 22. When the second limiting block 51 is fixed in the second fixing groove 52, the second limiting block 51 protrudes from the side wall of one end of the driven rod 5 so as to be able to be clamped in the second limiting groove 32. In this way, the first limiting block 41 and the driving rod 4 are detachably connected. When replacing the driving rod 4, the first limiting block 41 can be directly removed from the old driving rod 4 and installed on the new driving rod 4. The second limiting block 51 and the driven rod 5 are detachably connected. When replacing the driven rod 5, the second limiting block 51 can be directly removed from the old driven rod 5 and installed on the new driven rod 5. The first limiting block 41 and the second limiting block 51 can be reused, saving costs.

[0047] In the present utility model, both the first limiting block 41 and the second limiting block 51 are flat keys, which have the functions of high-precision positioning and guiding, and facilitate the stable assembly and synchronous rotation of the driving rod 4 and the driving gear 2, and the driven rod 5 and the driven gear 3.

[0048] In addition, refer to Figure 2, the driving rod 4 and the driven rod 5 are both installed in the gearbox 1 through bearings 6. Bearings 6 are sleeved on the outer peripheries of the driving rod 4 and the driven rod 5 in the radial direction, and the bearings 6 are rotatably installed in the gearbox 1. The setting of the bearings 6 can improve the smoothness of the rotation of the driving rod 4, the driven rod 5, the driving gear 2 and the driven gear 3.

[0049] Specifically, the gearbox 1 is provided with a mating installation groove 11 corresponding to the bearing 6, and the bearing 6 is rotatably installed in the corresponding installation groove 11. The setting of the installation groove 11 has a limiting effect on the bearing 6, so that the bearing 6 can rotate circumferentially without moving axially, thereby ensuring the stable meshing of the driving gear 2 and the driven gear 3.

[0050] On this basis, the driving gear 2, the driven gear 3, the driving rod 4 and the driven rod 5 are all arranged at intervals from the inner wall of the gearbox 1. Due to the support and limitation of the bearing 6, the interval setting can ensure the smooth rotation of the driving gear 2, the driven gear 3, the driving rod 4 and the driven rod 5, and improve the efficiency of bolt installation.

[0051] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and retouches can be made, and these improvements and retouches are also regarded as the protection scope of the present utility model.

Claims

1. An auxiliary force - adding device for fastening bolts, characterized in that, Comprising: A gear set, the gear set includes a gearbox, within the gearbox are provided a driving gear and a driven gear that are rotatable and meshed with each other, and the central axes of the driving gear and the driven gear intersect; A driving rod, one end of the driving rod is fixedly connected to the driving gear so that the driving rod rotates synchronously with the driving gear relative to the gearbox, and the other end of the driving rod extends out of the gearbox for adapting to and connecting a torque wrench; A driven rod, one end of the driven rod is fixedly connected to the driven gear so that the driven rod rotates synchronously with the driven gear relative to the gearbox, and the other end of the driven rod extends out of the gearbox for adapting to and connecting a bolt; The driving gear is provided with a first sleeve, the first sleeve is fixedly sleeved on the outer periphery of the diameter of one end of the driving rod, a first limiting block is provided on the side wall of one end of the driving rod, and a first limiting groove adapted to the first limiting block is opened on the inner wall of the first sleeve. In the assembled state, the first limiting block is clamped in the first limiting groove; The driven gear is provided with a second sleeve, the second sleeve is fixedly sleeved on the outer periphery of the diameter of one end of the driven rod, a second limiting block is provided on the side wall of one end of the driven rod, and a second limiting groove adapted to the second limiting block is opened on the inner wall of the second sleeve. In the assembled state, the second limiting block is clamped in the second limiting groove; 2. The auxiliary force - adding device for the fastening bolt according to claim 1, wherein: Both the driving rod and the driven rod are installed in the gearbox through bearings, bearings are sleeved on the outer peripheries of the diameters of the driving rod and the driven rod, and the bearings are rotatably installed in the gearbox; 3. The auxiliary force - adding device for the fastening bolt according to claim 2, characterized in that: Corresponding to the bearings in the gearbox are provided fitting installation grooves, and the bearings are rotatably installed in the corresponding installation grooves; 4. The auxiliary force - adding device for the fastening bolt according to claim 1, characterized in that: The first limiting groove axially penetrates through the first sleeve, the second limiting groove axially penetrates through the second sleeve. During assembly, the first limiting block is axially slidably arranged in the first limiting groove and the second limiting block is axially slidably arranged in the second limiting groove; 5. The auxiliary force - adding device for the fastening bolt according to claim 1, wherein: A first fixing groove adapted to the first limiting block is opened on the side wall of one end of the driving rod, a second fixing groove adapted to the second limiting block is opened on the side wall of one end of the driven rod. In the assembled state, the first limiting block is clamped in the first fixing groove and the second limiting block is clamped in the second fixing groove; 6. The auxiliary force - adding device for the fastening bolt according to claim 1, wherein: The central axis of the driving gear and the central axis of the driven gear are perpendicular; 7. The auxiliary force - adding device for the fastening bolt according to claim 1, wherein: The gearbox includes a first housing and a second housing, the first housing and the second housing are buckled and detachably connected to form a receiving cavity, and one end of the driving gear, the driven gear, the driving rod and the driven rod are all arranged in the receiving cavity; 8. The auxiliary force - adding device for the fastening bolt according to claim 2, wherein: The driving gear, the driven gear, the driving rod and the driven rod are all spaced from the inner wall of the gearbox.

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