Track bolt automatic tightening tool and design method thereof

Abstract

The invention provides a track bolt automatic tightening tool and a design method thereof.The track bolt automatic tightening tool is used for being arranged on a four-axis automatic tightening machine in a sleeving mode to position an output shaft of the four-axis automatic tightening machine, the track bolt automatic tightening tool comprises a first tightening tool body and a second tightening tool body, and the first tightening tool body comprises a first tool plate; the first tightening tool comprises a first tool plate, the second tightening tool comprises a second tool plate, and the first tool plate and the second tool plate are each provided with a plurality of tool connecting holes used for being connected with the four-axis automatic tightening machine, two positioning holes used for positioning an output shaft of the four-axis automatic tightening machine and a plurality of lightening holes. According to the tool, the manual operation time can be greatly shortened, and the bolt tightening efficiency is improved; through accurate positioning of the tool, the risks of missed screwing and insufficient screwing can be remarkably reduced, and the safety and durability of the crawler chassis are improved.

Description

Technical Field

[0001] The present application relates to the technical field of crawler chassis, and in particular to an automatic tightening tool for crawler bolts and a design method thereof. Background Art

[0002] In heavy engineering machinery such as excavators, bulldozers, and rotary drilling rigs, the crawler chassis is a walking component composed of multiple track links and track shoes connected by bolts. Specifically, the track link, as the skeleton part of the crawler chassis, is responsible for supporting and guiding the track shoes to move along the ground. The track shoes are in direct contact with the ground, providing the necessary friction for the whole machine to move, ensuring that the engineering machinery can move stably under various terrain conditions. Among them, each track shoe is assembled on the track link with 4 bolts. Traditional track bolt tightening operations generally rely on manually operated single-axis electric tightening guns or torque wrenches to complete. Each track usually includes 200 to 250 bolts. The traditional manual tightening method is not only extremely labor-intensive and easy to cause operator fatigue, but also inefficient and has a high risk of missing tightening. This will directly affect the safety and durability of the crawler chassis. Summary of the invention

[0003] In order to solve the technical problems existing in the prior art, the first aspect of the present application provides an automatic tightening tool for track bolts, which is used to be mounted on a four-axis automatic tightening machine to position the output shaft of the four-axis automatic tightening machine, including a first tightening tool and a second tightening tool, the first tightening tool including a first tool plate, the second tightening tool including a second tool plate, and the first tool plate and the second tool plate are both provided with a number of tool connection holes for connecting to the four-axis automatic tightening machine, two positioning holes for positioning the output shaft of the four-axis automatic tightening machine and a plurality of weight reduction holes.

[0004] Furthermore, the number of the tooling connection holes is two, and each of the tooling connection holes is provided with a bushing, and the bushing is fixedly connected to the first tooling plate or the second tooling plate by a first screw.

[0005] Furthermore, a guide sleeve is provided in the positioning hole, and the guide sleeve is fixedly connected to the first tooling plate or the second tooling plate through a second screw.

[0006] Furthermore, chamfers are provided at outer edges of the inner holes of the bushing and the guide sleeve.

[0007] Furthermore, the inner holes of the bushing and the guide sleeve are stepped holes with a larger outer diameter and a smaller inner diameter.

[0008] Furthermore, the weight-reducing hole is a square hole.

[0009] A second aspect provides a design method for an automatic track bolt tightening tool, comprising the following steps: Determine the outer dimensions S1 and S2 of the first tooling plate and the second tooling plate, the distance dimension S13 between the first tooling plate and the second tooling plate, and the position dimensions S3, S4, and S12 of the tooling connection holes according to the dimensions of the tightening template mounting frame of the tightening machine, wherein S1 is the length of the first tooling plate and the second tooling plate, S2 is the width of the first tooling plate and the second tooling plate, S3 is the vertical distance from the center of the upper tooling connection hole to the upper wide side, S4 is the horizontal distance between the centers of the two tooling connection holes, and S12 is the vertical distance from the tooling connection hole to the inner long side; Determine the track assembly centerline position dimension S11 according to the track assembly centerline position, and then determine the position dimensions S5, S6, S7, S8, S9, S10 of the locating holes on the first tooling plate and the second tooling plate according to the track pitch dimension A and the connection hole position dimensions B, C, D, where A is the track pitch dimension, B is the lateral distance between the center of the first connection hole 71 and the center of the fourth connection hole 74, C is the vertical distance between the center of the first connection hole 71 and the center of the second connection hole 72, and D is the vertical distance between the center of the third connection hole 73 and the center of the fourth connection hole 74. The vertical distance between the centers of the upper locating holes of the first tooling plate and the center line of the track assembly, S5 is the vertical distance between the center of the locating hole on the upper side of the first tooling plate and the center line of the track assembly, S6 is the vertical distance between the center of the locating hole on the lower side of the first tooling plate and the center line of the track assembly, S7 is the lateral distance between the centers of the two locating holes on the first tooling plate, S8 is the vertical distance between the center of the upper locating hole on the second tooling plate and the center line of the track assembly, S9 is the vertical distance between the center of the locating hole on the lower side of the second tooling plate and the center line of the track assembly, and S10 is the lateral distance between the centers of the two locating holes on the first and second tooling plates; Determine the direction of travel of the track assembly relative to the automatic track bolt tightening tooling according to the assembly line layout, When the track assembly moves from left to right, S5=S9=C / 2, S6=S8=D / 2, S7=S10=B, S12=(2A-B-S13) / 2, When the moving direction of the track assembly is from right to left, S5=S9=D / 2, S6=S8=C / 2, S7=S10=B, S12=(2A-B-S13) / 2.

[0010] Compared with the prior art, the beneficial effects of this application are: The track bolt automatic tightening tool of the present application can significantly reduce the manual operation time and improve the efficiency of bolt tightening; the risk of missed tightening and insufficient tightening can be significantly reduced through the precise positioning of the tool, and the safety and durability of the track chassis can be improved. At the same time, the use of the automatic tightening tool reduces the labor intensity of manual operation and reduces the fatigue of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1This is a schematic diagram of the structure of the automatic tightening tool for track bolts of the present application; Figure 2 A cross-sectional view of the crawler assembly of the present application; Figure 3 A diagram showing a design method for the automatic tightening tooling for track bolts of the present application; In the figure: 1. First tooling plate; 2. Bushing; 3. Guide sleeve; 4. Second tooling plate; 5. First screw; 6. Second screw; 7. Track shoe; 71. First connecting hole; 72. Second connecting hole; 73. Third connecting hole; 74. Fourth connecting hole. DETAILED DESCRIPTION

[0012] In order to facilitate the understanding of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0013] The present application is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect defined in this way can be combined with any other aspect or aspects, unless it is clearly stated that it cannot be combined. In particular, any feature that is considered to be preferred or advantageous can be combined with one or more other features that are considered to be preferred or advantageous.

[0014] The words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0015] In the description of the present application, it should be understood that the terms "inside", "outside", "up", "down", "left" and "right" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present application.

[0016] In heavy engineering machinery such as excavators, bulldozers, and rotary drilling rigs, the track assembly is a walking component composed of multiple track links and track shoes 7 connected by bolts. Each track shoe 7 is assembled on the track link by 4 bolts, wherein the track shoe 7 is provided with corresponding first connecting holes 71, second connecting holes 72, third connecting holes 73, and fourth connecting holes 74, wherein the first connecting holes 71 and the second connecting holes 72 are on the same vertical line, the third connecting holes 73 and the fourth connecting holes 74 are on the same vertical line, and the vertical line where the first connecting holes 71 and the second connecting holes 72 are located is parallel to the vertical line where the third connecting holes 73 and the fourth connecting holes 74 are located. Traditional track bolt tightening operations generally rely on manually operated single-axis electric tightening guns or torque wrenches to complete. Not only is the labor intensity extremely high, it is easy to cause operator fatigue, but it is also inefficient and there is a greater risk of leaking.

[0017] To this end, the present application discloses a track bolt automatic tightening tool and a design method thereof Implementation refer to Figure 1 to Figure 2 As shown, the present application discloses an automatic tightening tool for track bolts, which is used to be sleeved on a four-axis automatic tightening machine to position the output shaft of the four-axis automatic tightening machine, and includes a first tightening tool and a second tightening tool.

[0018] The first tightening tool includes a first tool plate 1, on which are provided a plurality of tool connection holes for connecting to a four-axis automatic tightening machine, in which bushings 2 are provided to increase the stability and durability of the connection; two positioning holes for positioning the output shaft of the four-axis automatic tightening machine, in which guide sleeves 3 are provided; and a plurality of weight-reducing holes.

[0019] The second tightening tool includes a second tool plate 4, on which are provided a plurality of tool connection holes for connecting to a four-axis automatic tightening machine, in which bushings 2 are provided; two positioning holes for positioning the output shaft of the four-axis automatic tightening machine to ensure the accuracy of the tightening operation, to further guide the output shaft and reduce wear; and a plurality of weight-reducing holes.

[0020] The first tightening tool also includes a first screw 5 and a second screw 6; the bushing 2 is fixedly connected to the first tooling plate 1 and the second tooling plate 4 respectively through the first screw 5; the guide sleeve 3 is fixedly connected to the first tooling plate 1 and the second tooling plate 4 respectively through the second screw 6.

[0021] The crawler bolt automatic tightening tool of this embodiment can greatly reduce the manual operation time and improve the efficiency of bolt tightening; through the precise positioning of the tool, the risk of missed tightening and insufficient tightening can be significantly reduced, and the safety and durability of the crawler chassis can be improved. At the same time, the use of the automatic tightening tool reduces the labor intensity of manual operation and reduces the fatigue of the operator.

[0022] In some embodiments, the outer edges of the inner holes of the bushing 2 and the guide sleeve 3 are both chamfered; the chamfer design helps to reduce the wear and resistance caused by direct collision, and improve the fit between the bushing 2 and the bolt and between the guide sleeve 3 and the output shaft.

[0023] In some embodiments, the inner holes of the bushing 2 and the guide sleeve 3 are stepped holes with a larger outer diameter and a smaller inner diameter. In addition, the weight-reducing hole is a square hole, which reduces the overall weight of the tooling and improves the convenience of operation.

[0024] Implementation II This application also provides a design method for automatic tightening tooling of track bolts, referring to Figure 3 As shown, the following steps are included: Determine the outer dimensions S1 and S2 of the first tooling plate 1 and the second tooling plate 4, the distance dimension S13 between the first tooling plate 1 and the second tooling plate 4, and the position dimensions S3, S4, and S12 of the tooling connection holes according to the dimensions of the tightening template mounting frame of the tightening machine, wherein S1 is the length of the first tooling plate 1 and the second tooling plate 4, S2 is the width of the first tooling plate 1 and the second tooling plate 4, S3 is the vertical distance from the center of the upper tooling connection hole to the upper wide side, S4 is the horizontal distance between the centers of the two tooling connection holes, and S12 is the vertical distance from the tooling connection hole to the inner long side; Determine the track assembly centerline position dimension S11 according to the track assembly centerline position, and then determine the position dimensions S5, S6, S7, S8, S9, S10 of the positioning holes on the first tooling plate 1 and the second tooling plate 4 according to the track pitch dimension A and the connection hole position dimensions B, C, D, where A is the track pitch dimension, B is the lateral distance between the center of the first connection hole 71 and the center of the fourth connection hole 74, C is the vertical distance between the center of the first connection hole 71 and the center of the second connection hole 72, and D is the vertical distance between the center of the third connection hole 73 and the center of the fourth connection hole 74. The vertical distance between the center of the upper locating hole of the first tooling plate 1 and the center line of the crawler assembly is S5, S6 is the vertical distance between the center of the lower locating hole of the first tooling plate 1 and the center line of the crawler assembly, S7 is the lateral distance between the centers of the two locating holes on the first tooling plate 1, S8 is the vertical distance between the center of the upper locating hole of the second tooling plate 4 and the center line of the crawler assembly, S9 is the vertical distance between the center of the lower locating hole of the second tooling plate 4 and the center line of the crawler assembly, and S10 is the lateral distance between the centers of the two locating holes on the first and second tooling plates 4; Determine the direction of travel of the track assembly relative to the automatic track bolt tightening tooling according to the assembly line layout, When the track assembly moves from left to right, S5=S9=C / 2, S6=S8=D / 2, S7=S10=B, S12=(2A-B-S13) / 2, When the moving direction of the track assembly is from right to left, S5=S9=D / 2, S6=S8=C / 2, S7=S10=B, S12=(2A-B-S13) / 2.

[0025] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, which fall within the scope of the present application to be protected. The scope of protection claimed in the present application is defined by the attached claims and their equivalents.

Claims

1. A track bolt automatic tightening tool, which is used to be mounted on a four-axis automatic tightening machine to position the output shaft of the four-axis automatic tightening machine, and is characterized in that: The invention comprises a first tightening tool and a second tightening tool, wherein the first tightening tool comprises a first tool plate (1), and the second tightening tool comprises a second tool plate (4), wherein the first tool plate (1) and the second tool plate (4) are both provided with a plurality of tool connection holes for connecting to a four-axis automatic tightening machine, two positioning holes for positioning the output shaft of the four-axis automatic tightening machine, and a plurality of weight-reducing holes.

2. The automatic track bolt tightening tool according to claim 1, characterized in that: The number of the tooling connection holes is two, and each of the tooling connection holes is provided with a bushing (2), and the bushing (2) is fixedly connected to the first tooling plate (1) or the second tooling plate (4) via a first screw (5).

3. The automatic track bolt tightening tool according to claim 2, characterized in that: A guide sleeve (3) is provided in the positioning hole, and the guide sleeve (3) is fixedly connected to the first tooling plate (1) or the second tooling plate (4) via a second screw (6).

4. The automatic track bolt tightening tool according to claim 3, characterized in that: The outer edges of the inner holes of the bushing (2) and the guide sleeve (3) are both provided with chamfers.

5. The automatic track bolt tightening tool according to claim 3, characterized in that: The inner holes of the bushing (2) and the guide sleeve (3) are both stepped holes with a larger outer diameter and a smaller inner diameter.

6. The automatic track bolt tightening tool according to claim 1, characterized in that: The weight-reducing hole is a square hole.

7. A design method for automatic tightening tooling for track bolts, characterized in that: The following steps are involved: Determine the outer dimensions S1 and S2 of the first tooling plate (1) and the second tooling plate (4), the distance dimension S13 between the first tooling plate (1) and the second tooling plate (4), and the position dimensions S3, S4, and S12 of the tooling connection holes according to the dimensions of the tightening template mounting frame of the tightening machine, wherein S1 is the length of the first tooling plate (1) and the second tooling plate (4), S2 is the width of the first tooling plate (1) and the second tooling plate (4), S3 is the vertical distance from the center of the upper tooling connection hole to the upper wide side, S4 is the horizontal distance between the centers of the two tooling connection holes, and S12 is the vertical distance from the tooling connection hole to the inner long side; The track assembly centerline position dimension S11 is determined according to the track assembly centerline position, and then the position dimensions S5, S6, S7, S8, S9, S10 of the positioning holes on the first tooling plate (1) and the second tooling plate (4) are determined according to the track pitch dimension A and the connection hole position dimensions B, C, D, wherein A is the track pitch dimension, B is the lateral distance between the center of the first connection hole 71 and the center of the fourth connection hole 74, C is the vertical distance between the center of the first connection hole 71 and the center of the second connection hole 72, and D is the vertical distance between the center of the third connection hole 73 and the center of the fourth connection hole 74. S5 is the vertical distance between the center of the upper locating hole of the first tooling plate (1) and the center line of the crawler assembly, S6 is the vertical distance between the center of the lower locating hole of the first tooling plate (1) and the center line of the crawler assembly, S7 is the lateral distance between the centers of the two locating holes on the first tooling plate (1), S8 is the vertical distance between the center of the upper locating hole of the second tooling plate (4) and the center line of the crawler assembly, S9 is the vertical distance between the center of the lower locating hole of the second tooling plate (4) and the center line of the crawler assembly, and S10 is the lateral distance between the centers of the two locating holes on the first and second tooling plates (4); Determine the direction of travel of the track assembly relative to the automatic track bolt tightening fixture according to the assembly line layout. When the track assembly moves from left to right, S5=S9=C / 2, S6=S8=D / 2, S7=S10=B, S12=(2A-B-S13) / 2, When the moving direction of the track assembly is from right to left, S5=S9=D / 2, S6=S8=C / 2, S7=S10=B, S12=(2A-B-S13) / 2.

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