A chain saw

Abstract

An embodiment of the present application provides a chain saw, which includes a power unit, a transmission unit, a traction unit, and a cutting unit. A power unit, a transmission unit, and a traction unit are respectively arranged at both ends of the cutting unit. The power unit at each end is drivingly connected to the corresponding transmission unit and traction unit, and the two transmission units are respectively drivingly connected to the cutting unit; the cutting unit includes a mounting base, a chain plate, a sprocket, and a cutting chain. The two mounting bases are respectively connected to a transmission unit, both ends of the chain plate are respectively connected to a mounting base, the two sprockets are respectively drivingly connected to a transmission unit, the cutting chain is tensioned on the chain plate, and the cutting chain meshes with the two sprockets for transmission. This chain saw cuts the graded crushed stone under the ballastless track support layer. The power unit, the transmission unit, and the traction unit are respectively arranged on both sides of the support layer. The cutting unit is arranged transversely along the support layer, and the chain saw is towed forward longitudinally by the traction unit. Since the thickness of the cutting chain of the cutting unit can be adjusted as needed, the cutting of the graded crushed stone on the roadbed arch area can be completed at one time, thus improving the construction efficiency.

Description

Technical Field

[0001] This application belongs to the field of track engineering, and particularly relates to a chain saw for rectifying the arching of ballastless track subgrades. Background Art

[0002] In the ballastless track structure of high-speed railways, the phenomenon of subgrade arching is very likely to occur. For the existing methods of rectifying arching diseases, it can be achieved for the case of small arching amounts, such as adjusting track fasteners. For the case of large arching amounts, generally, the original track needs to be demolished and the subgrade needs to be refilled, or a wire saw is used for multiple cuts, which cannot be completed in one cut, resulting in low rectification efficiency and consuming a large amount of manpower, material resources, and financial resources. Summary of the Invention

[0003] In view of this, the embodiments of this application are expected to provide a chain saw to solve the problems of low rectification efficiency and high cost in rectifying the arching of ballastless track subgrades.

[0004] To achieve the above object, the technical solution of the embodiments of this application is realized as follows:

[0005] The embodiments of this application provide a chain saw, including a power unit, a transmission unit, a traction unit, and a cutting unit. One power unit, one transmission unit, and one traction unit are respectively arranged at both ends of the cutting unit. Each power unit is drivingly connected to the corresponding transmission unit and traction unit at its end, and the two transmission units are respectively drivingly connected to the cutting unit;

[0006] The cutting unit includes a mounting seat, a chain plate, a sprocket, and a cutting chain. The two mounting seats are respectively connected to one transmission unit. Both ends of the chain plate are respectively connected to one mounting seat. The two sprockets are respectively drivingly connected to one transmission unit. The cutting chain is tensioned on the chain plate, and the cutting chain meshes with the two sprockets for transmission.

[0007] Further, adjustment holes are formed on the cutting unit, and at least two positioning holes are formed on the transmission unit. By changing the fastening connection between the adjustment holes and different positioning holes, the installation angle of the cutting unit relative to the transmission unit is adjusted.

[0008] Further, the chain plate includes:

[0009] Outer chain plates;

[0010] Inner chain plates, one ends of the two inner chain plates are respectively connected to the corresponding mounting seats; and

[0011] Adjusting members, the other ends of the two inner chain plates are respectively connected to both ends of the outer chain plate through one adjusting member, and the adjusting member is used to adjust the installation positions of the inner chain plates and the outer chain plate to adjust the tension of the cutting chain.

[0012] Further, a receiving hole is formed on the inner link plate, and a stop portion is formed on the side wall of the receiving hole. The stop portion divides the receiving hole into a communicated first receiving portion and a second receiving portion;

[0013] At both ends of the outer link plate, a receiving cavity with an end opening and a limiting hole communicated with the receiving cavity are respectively formed. One end of the inner link plate away from the mounting seat is received in the receiving cavity;

[0014] The adjusting member includes an adjusting rod and a limiting pin with a threaded hole. The adjusting rod includes a rod head and a screw rod connected to the rod head. A step is formed between the rod head and the screw rod. The adjusting rod is disposed in the receiving hole, wherein the rod head is located in the first receiving portion, the screw rod is located in the second receiving portion, the stop portion restricts the rod head from moving towards the second receiving portion, the limiting pin is inserted into the limiting hole, and the screw rod is connected to the threaded hole.

[0015] Further, an adjusting opening communicated with the first receiving portion is formed on the outer link plate, and a plurality of adjusting holes are formed on the rod head. The plurality of adjusting holes are spaced apart along the circumferential direction of the rod head.

[0016] Further, the outer link plate includes two oppositely disposed vertical plates and two horizontal plates connected between the two vertical plates. Two guiding grooves and a cavity located between the two guiding grooves are formed between the two horizontal plates and the two vertical plates. At least a part of the cut chain is received in the guiding groove.

[0017] Further, the outer link plate further includes reinforcing ribs. A plurality of the reinforcing ribs are spaced apart and disposed in the cavity. The reinforcing ribs are connected to the vertical plates and / or the horizontal plates.

[0018] Further, a first mounting hole is formed at one end of the mounting seat. The mounting seat is connected to the transmission portion through the first mounting hole. Two limiting plates, a convex shaft located between the two limiting plates, and a second mounting hole are formed at the other end of the mounting seat;

[0019] A third mounting hole corresponding to the second mounting hole and a shaft hole corresponding to and mating with the convex shaft are formed at one end of the inner link plate close to the mounting seat;

[0020] The inner link plate is mounted between the two limiting plates. The convex shaft is inserted into the shaft hole, and the second mounting hole and the third mounting hole are tightly connected.

[0021] Further, one end of the mounting seat away from the first mounting hole is bent towards the side away from the convex shaft to form a clamping portion. The adjusting hole is formed on the clamping portion, and the clamping portion is clamped on the transmission portion.

[0022] Further, the sprocket is located outside the mounting seat. The cutting part further includes a bearing arranged in the first mounting hole, a spacer arranged between the sprocket and the bearing, and an end plate arranged outside the sprocket. The transmission shaft of the transmission part passes through the bearing, the first mounting hole, the spacer, and the sprocket, and the end plate limits the sprocket.

[0023] A chain saw provided by an embodiment of the present application is used for the treatment of the arching of the ballastless track subgrade, and cuts the graded crushed stone under the ballastless track support layer. Two power parts, two transmission parts, and two traction parts are respectively arranged on both sides of the support layer. The cutting part is arranged transversely along the support layer. The two power parts respectively drive the two transmission parts, and then the two transmission parts drive the cutting part to transversely cut the graded crushed stone under the support layer, and the traction part pulls the chain saw to move forward longitudinally along the ballastless track. Since the thickness of the cutting chain of the cutting part can be adjusted as needed, the cutting of the graded crushed stone in the arching area of the subgrade can be completed at one time, so the construction time is shortened and the construction efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a chain saw according to an embodiment of the present application;

[0025] Figure 2 is a partial schematic diagram of a chain saw according to an embodiment of the present application, showing the installation structure of the chain plate and the transmission part;

[0026] Figure 3 is Figure 1 a partial enlarged schematic diagram behind point A in

[0027] Figure 4 is Figure 3 a sectional view in the B-B direction of

[0028] Figure 5 is a schematic structural diagram of the inner chain plate of a chain saw according to an embodiment of the present application;

[0029] Figure 6 is a schematic structural diagram of an adjusting part of a chain saw according to an embodiment of the present application;

[0030] Figure 7 is a schematic structural diagram of the outer chain plate of a chain saw according to an embodiment of the present application;

[0031] Figure 8 is Figure 1 a sectional view in the D-D direction of

[0032] Figure 9 is a schematic diagram of a mounting seat of a chain saw according to an embodiment of the present application from a perspective;

[0033] Figure 10Schematic diagram of a mounting base in a chainsaw from another perspective according to an embodiment of the present application; and

[0034] Figure 11 Schematic diagram of a structure of a chainsaw applied to the treatment of the up - arch of a ballastless track subgrade according to an embodiment of the present application.

[0035] Explanation of reference numerals:

[0036] 1. Power unit; 2. Transmission unit; 20. Positioning hole; 21. Transmission shaft; 3. Traction unit; 4. Cutting unit; 40. Mounting base; 400. First mounting hole; 401. Second mounting hole; 402. Convex shaft; 403. Limiting plate; 404. Clamping part; 4041. Adjusting hole; 41. Chain plate; 410. Outer chain plate; 4101. Accommodating cavity; 4102. Limiting hole; 4103. Adjusting opening; 4104. Vertical plate; 4105. Horizontal plate; 4106. Guide groove; 4107. Cavity; 4108. Reinforcing rib; 411. Inner chain plate; 4111. Accommodating hole; 41111. Stopping part; 41112. First accommodating part; 41113. Second accommodating part; 4112. Shaft hole; 4113. Third mounting hole; 412. Adjusting part; 4121. Adjusting rod; 41211. Rod head; 412111. Adjusting hole; 412112. Step; 41212. Screw; 4122. Limiting pin; 41221. Threaded hole; 42. Sprocket; 43. Cutting chain; 44. Bearing; 45. Spacer; 46. Shaft end plate; 5. Graded crushed stone; 6. Ballastless track; 61. Track slab; 62. Support layer; 63. End beam; 7. Walking groove; 8. Traction pile; 9. Working groove. Detailed implementation manners

[0037] It should be noted that, without conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other. The detailed description in the detailed implementation manners should be understood as an explanatory illustration of the purpose of the present application and should not be regarded as an improper limitation of the present application.

[0038] In the description of the present application, the "front" and "rear" orientation or position relationship is based on the orientation shown in the attached Figure 1 The "upper" and "lower" orientation is based on the orientation shown in the attached Figure 8 The "horizontal" is based on the orientation shown in the attached Figure 11 The "longitudinal" is along the direction of the ballastless track. It should be understood that these orientation terms are only for the convenience of describing the present application 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 cannot be understood as a limitation of the present application.

[0039] For the arching disease of the ballastless track subgrade, a common treatment method is to restore the smoothness of the ballastless track line through fastener adjustment. However, the fastener has a small adjustment ability for arching deformation. When the arching amount exceeds the adjustment ability of the fastener, other methods must be used to restore the elevation of the ballastless track. In addition, the workload during adjustment is large, consuming a lot of manpower, so the efficiency is low and the cost is high. Another method is to manually demolish the original ballastless track structure and then refill the subgrade. This method has a long construction time, low efficiency and high treatment cost.

[0040] In view of this, the embodiment of the present application provides a chain saw, which is applied to the construction of treating the arching of the ballastless track subgrade. Please refer to Figure 1 , the chain saw includes a power unit 1, a transmission unit 2, a traction unit 3 and a cutting unit 4. One power unit 1, one transmission unit 2 and one traction unit 3 are respectively arranged at both ends of the cutting unit 4. Each power unit 1 is drivingly connected to the corresponding transmission unit 2 and traction unit 3 at its end. The two transmission units 2 are respectively drivingly connected to the cutting unit 4; the cutting unit 4 includes a mounting seat 40, a chain plate 41, a sprocket 42 and a cutting chain 43. The two mounting seats 40 are respectively connected to one transmission unit 2. Both ends of the chain plate 41 are respectively connected to one mounting seat 40. The two sprockets 42 are respectively drivingly connected to one transmission unit 2. The cutting chain 43 is tensioned on the chain plate 41, and the cutting chain 43 meshes with the two sprockets 42 for transmission.

[0041] Combined with referring to Figure 11 , the two power units 1 respectively drive the two transmission units 2, and then the two transmission units 2 drive the sprockets 42 of the cutting unit 4. The cutting chain 43 meshing with the sprockets 42 is driven by the rotation of the two sprockets 42. The graded crushed stone 5 under the supporting layer 62 is transversely cut by the rotation of the cutting chain 43, and the chain saw is pulled forward longitudinally along the ballastless track 6 by the traction unit 3. Since the power units 1 are arranged at both ends of the cutting unit 4, the effective cutting length of the chain saw is increased, and it can be used to cut the cut object with a large width. At the same time, the thickness of the cutting chain 43 of the cutting unit 4 can be adjusted according to needs, and the cutting of the graded crushed stone 5 in the arching area of the subgrade can be completed at one time, solving the problem of large arching amount of the ballastless track 6 subgrade and the need for multiple cuts. Therefore, the construction time is shortened and the construction efficiency is improved.

[0042] Continue to refer to Figure 11, before rectifying the arching disease of the subgrade of the ballastless track 6, the construction personnel install a power unit 1, a transmission unit 2 and a traction unit 3 into a whole, move it into the walking groove 7 on one side of the ballastless track 6 in the rectification area of the arching section, install another power unit 1, a transmission unit 2 and a traction unit 3 into another whole, move it into the walking groove 7 on the other side of the ballastless track 6 in the rectification area of the arching section, then place the cutting unit 4 at the working groove 9, and connect the two ends of the cutting unit 4 with the power unit 1, the transmission unit 2 and the traction unit 3 installed on both sides of the ballastless track 6 respectively. The traction unit 3 is connected with the traction pile 8, which is beneficial for the traction unit 3 to traction the chain saw to move forward in a fixed direction. Before rectifying the arching disease of the ballastless track 6, it is necessary to measure the arching amount, and exchange the corresponding thickness of the cutting chain 43 according to the size of the arching amount, so that the cutting chain 43 can cut the graded broken stone 5 at one time. When rectifying the arching disease of the ballastless track 6, the two power units 1 drive the two transmission units 2 respectively, and then the two transmission units 2 drive the cutting unit 4 to cut the graded broken stone 5 below the supporting layer 62 transversely, and the traction unit 3 traction the chain saw to move forward longitudinally along the ballastless track 6. It solves the problem that the subgrade of the ballastless track 6 has a large arching amount and needs to be cut multiple times, so it shortens the cutting time and improves the cutting efficiency. Among them, the rotation of the cutting chain 43 is indirectly driven by the two power units 1 at the same time, with sufficient power, ensuring sufficient cutting force and ensuring the stability of cutting the graded broken stone 5.

[0043] It should be noted that the related technology rectifies the supporting layer 62 of the ballastless track 6 in the arching section through a wire saw. The supporting layer 62 is a concrete structure with a large hardness, so it is extremely difficult to construct, and the construction efficiency is low and the construction time is long. While the chain saw of the present application cuts the graded broken stone 5 in the subgrade of the ballastless track 6. The graded broken stone 5 has a small hardness and is easy to cut, and the graded broken stone 5 does not belong to the ballastless track 6, so it is not easy to affect the structural strength and stability of the ballastless track 6. In each embodiment of the present application, the cutting object of the chain saw is the graded broken stone 5, which will not be elaborated below.

[0044] In one embodiment, the power unit 1 can be an explosion-proof motor, and the transmission unit 2 can be a gearbox. The power output by the explosion-proof motor is converted into the required rotation speed through the gearbox, driving the cutting chain 43 meshing on the sprocket 42 to rotate.

[0045] In one embodiment, the sprocket 43 can be selected as a five-star sprocket, that is, the sprocket 43 includes 5 meshing teeth, which is beneficial for the design of the cutting chain 43. It can be understood that the sprocket 43 can also be other multiple meshing teeth including 4 or 6, etc. Specifically, the sprocket 42 can be installed below the transmission unit 2. The installation position of the sprocket 42 determines the installation position of the cutting chain 43, so the cutting chain 43 is also installed below between the two transmission units 2, which is beneficial for the cutting chain 43 to cut the graded broken stone 5 close to the supporting layer 62 below, without cutting the graded broken stone 5 deeper, so the excavation depth of the working groove 9 can be reduced, the construction time can be shortened, and the construction cost can be reduced.

[0046] In one embodiment, the chain cutter 43 includes a plurality of picks connected in a ring shape, and each pick may include a plurality of cutting blades for cutting a cutting object such as graded crushed stone. The plurality of picks are detachably connected, facilitating the repair and replacement of damaged picks or blades.

[0047] In one embodiment, please refer to Figure 2 , an adjustment hole 4041 is formed on the mounting base 40, and at least two positioning holes 20 are formed on the transmission part 2. By changing the fastening connection between the adjustment hole 4041 and different positioning holes 20, the mounting angle of the cutting part 4 relative to the transmission part 2 can be adjusted. By adjusting the mounting angle of the cutting part 4 relative to the transmission part 2, the angle between the cutting part 4 and the ballastless track 6 can be changed, thereby finally realizing the change of the cutting direction of the cutting part 4. By changing the change of the cutting angle of the cutting part 4, the cutting requirements of different projects can be met.

[0048] It can be understood that the number of the positioning holes 20 is not limited, and the number of the positioning holes 20 distributed in a circular pattern on the transmission part 2 can be any number, which specifically depends on the project. For example, if it is necessary to change the angle between the cutting part 4 and the transmission part 2 very precisely, several positioning holes 20 can be arranged along the circumference on the flange edge of the transmission part 2. Conversely, the number of the positioning holes 20 can be arranged less.

[0049] Specifically, in one embodiment, please refer to Figure 2 , in the chain saw of the present application, four positioning holes 20 can be distributed in a circular pattern every 90° on the transmission part 2. After one of the positioning holes 20 is fastened to the adjustment hole 4041, fastening two of the positioning holes 20 to the adjustment hole 4041 can make the cutting part 4 and the transmission part 2 form different angles, which are 90° and 270° respectively. When the cutting part 4 and the transmission part 2 form a 90° angle, the chain saw longitudinally cuts the graded crushed stone 5 along the ballastless track 6; when the cutting part 4 and the transmission part 2 form a 270° angle, the chain saw longitudinally cuts the graded crushed stone 5 in the reverse direction along the ballastless track 6. By changing the change of the cutting angle of the cutting part 4, the chain saw can flexibly change the cutting direction to meet the different cutting angle requirements of the project.

[0050] In one embodiment, please refer to Figure 3, the link plate 41 includes an outer link plate 410, an inner link plate 411 and an adjusting member 412. One end of each of the two inner link plates 411 is respectively connected to the corresponding mounting seat 40, and the other ends of the two inner link plates 411 are respectively connected to both ends of the outer link plate 410 through an adjusting member 412. The adjusting member 412 is used to adjust the mounting positions of the inner link plate 411 and the outer link plate 410 so as to adjust the tension of the cutting chain 43. By adjusting the mounting positions of the inner link plate 411 and the outer link plate 410 through the adjusting member 412, the length of the link plate 41 is changed to adjust the tension of the cutting chain 43, thereby ensuring that the cutting chain 43 has sufficient force when cutting graded crushed stone 5, so as to achieve uniform and stable cutting.

[0051] In one embodiment, please refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 , a receiving hole 4111 is formed on the inner link plate 411, and a stop portion 41111 is formed on the side wall of the receiving hole 4111. The stop portion 41111 divides the receiving hole 4111 into a connected first receiving portion 41112 and a second receiving portion 41113. Both ends of the outer link plate 410 are respectively formed with a receiving cavity 4101 with an end opening and a limiting hole 4102 communicating with the receiving cavity 4101. One end of the inner link plate 411 away from the mounting seat 40 is received in the receiving cavity 4101. The adjusting member 412 includes an adjusting rod 4121 and a limiting pin 4122 having a threaded hole 41221. The adjusting rod 4121 includes a rod head 41211 and a screw rod 41212 connected to the rod head 41211. A step 412112 is formed between the rod head 41211 and the screw rod 41212. The adjusting rod 4121 is disposed in the receiving hole 4111, wherein the rod head 41211 is located in the first receiving portion 41112, and the screw rod 41212 is located in the second receiving portion 41113. The stop portion 41111 restricts the rod head 41211 from moving towards the second receiving portion 41113. The limiting pin 4122 is inserted into the limiting hole 4102, and the screw rod 41212 is connected to the threaded hole 41221.

[0052] It can be understood that by rotating the screw 41212 of the adjusting rod 4121 in the threaded hole 41221 of the limit pin 4122, the length of the screw 41212 screwed into the threaded hole 41221 can be adjusted. Since the limit pin 4122 is inserted into the limit hole 4102, the limit hole 4102 is formed at both ends of the outer link plate 410, and the screw 41212 is located in the second accommodating portion 41113. The second accommodating portion 41113 belongs to the accommodating hole 4111, and the accommodating hole 4111 belongs to the inner link plate 411. Therefore, adjusting the length of the screw 41212 screwed into the threaded hole 41221 is equivalent to adjusting the installation distance between the inner link plate 411 and the outer link plate 410, thereby adjusting the tension of the cutting chain 43. Sufficient tension can enable the cutting chain 43 to have sufficient force to cut the graded crushed stone 5, thereby achieving the effect of uniform and stable cutting. In addition, by the stop portion 41111 abutting against the step 412112 formed between the rod head 41211 and the screw 41212, the movement of the rod head 41211 towards the second accommodating portion 41113 is restricted, thereby preventing the adjusting rod 4121 from sliding arbitrarily in the accommodating hole 4111 of the inner link plate 411, preventing the installation distance between the inner link plate 411 and the outer link plate 410 from changing arbitrarily, and finally ensuring that the tension force between the inner link plate 411 and the outer link plate 410 is uniform, ensuring the stability of the cutting portion 4 for cutting the graded crushed stone 5.

[0053] In one embodiment, please refer to Figure 4 、 Figure 5 、 Figure 6 and Figure 7 , an adjustment opening 4103 communicating with the first accommodating portion 41112 is formed on the outer link plate 410, and a plurality of adjustment holes 412111 are formed on the rod head 41211. The plurality of adjustment holes 412111 are circumferentially spaced apart along the rod head 41211. By forming the adjustment opening 4103 communicating with the first accommodating portion 41112 on the outer link plate 410, it is convenient for construction personnel to have an operating space. This operating space is used for construction personnel to insert an adjustment tool into the adjustment hole 412111 and turn the adjustment rod 4121 with the adjustment tool to adjust the length of the screw 41212 screwed into the limit pin 4122. The circumferential spacing of the plurality of adjustment holes 412111 along the rod head 41211 is beneficial for providing the adjustment tool with multiple directions to adjust the screw 41212, avoiding the situation where when there is only one adjustment hole 412111, one adjustment hole 412111 is blocked by the outer link plate 410 and the adjustment tool cannot be inserted.

[0054] In one embodiment, please refer to Figure 7, the outer link plate 410 includes two opposite vertical plates 4104 and two horizontal plates 4105 connected between the two vertical plates 4104. Two guiding grooves 4106 and a cavity 4107 located between the two guiding grooves 4106 are formed between the two horizontal plates 4105 and the two vertical plates 4104. At least a part of the cutting chain 43 is accommodated in the guiding groove 4106. The formation of the two guiding grooves 4106 between the two horizontal plates 4105 and the two vertical plates 4104 not only facilitates the directional rotation of the cutting chain 43 along the direction of the guiding groove 4106, but also ensures that the cutting chain 43 has a uniform tension when the cutting chain 43 is installed in the guiding groove 4106. Wherein, at least a part of the cutting chain 43 is accommodated in the guiding groove 4106, and the other part is tensioned on the sprocket 42.

[0055] In one embodiment, please refer to Figure 3 and 8 , since the width of the graded crushed stone 5 cut by the chain saw is relatively large, the cutting chain 43 in contact with the graded crushed stone 5 is also relatively long. The longer working cutting chain 43 requires sufficient cutting force, and the cutting chain 43 is installed in the guiding groove 4106 of the outer link plate 410. The outer link plate 410 mainly bears the bearing capacity of the cutting chain 43. In order to better play the bearing role and strengthen the strength of the outer link plate 410, the outer link plate 410 further includes reinforcing ribs 4108. A plurality of reinforcing ribs 4108 are arranged at intervals in the cavity 4107, and the reinforcing ribs 4108 are connected to the vertical plate 4104 and / or the horizontal plate.

[0056] In one embodiment, please refer to Figure 4 , Figure 5 and Figure 10 , one end of the mounting seat 40 is formed with a first mounting hole 400. The mounting seat 40 is connected to the transmission part 2 through the first mounting hole 400. The other end of the mounting seat 40 is formed with two limiting plates 403, as well as a convex shaft 402 and a second mounting hole 401 located between the two limiting plates 403; a third mounting hole 4113 corresponding to the second mounting hole 401 and a shaft hole 4112 corresponding to and matching the convex shaft 402 are formed at one end of the inner link plate 411 close to the mounting seat 40; the inner link plate 411 is installed between the two limiting plates 403, the convex shaft 402 is inserted into the shaft hole 4112, and the second mounting hole 401 and the third mounting hole 4113 are tightly connected.

[0057] In one embodiment, please refer to Figure 2 and Figure 9, one end of the mounting base 40 away from the first mounting hole 400 is bent away from the convex shaft 402 to form a clamping portion 404. An adjustment hole 4041 is formed on the clamping portion 404, and the clamping portion 404 is clamped on the transmission portion 2. Since there are already the convex shaft 402 and the second mounting hole 401 between the two limiting plates 403, in order to avoid interference between the convex shaft 402 and the second mounting hole 401 when fastening the adjustment hole 4041 and the transmission portion 2, the clamping portion 404 is bent, and the adjustment hole 4041 is formed on the clamping portion 404, which plays a role of misaligned fastening. In addition, bending to form the clamping portion 404 is beneficial for the flange of the transmission portion 2 to be stuck in the clamping portion 404, which plays a role of positioning and is convenient for installation operation. The clamping portion 404 can be integrally formed with the main body of the mounting base 40, or can be installed on the main body of the mounting base 40 through fasteners.

[0058] In one embodiment, please refer to Figure 4 , the sprocket 42 is located outside the mounting base 40. The cutting portion 4 further includes a bearing 44 disposed in the first mounting hole 400, a spacer 45 disposed between the sprocket 42 and the bearing 44, and an end plate 46 disposed outside the sprocket 42. The transmission shaft 21 of the transmission portion 2 passes through the bearing 44, the first mounting hole 400, the spacer 45, and the sprocket 42, and the end plate 46 limits the sprocket 42.

[0059] Through the bearing 44 in the first mounting hole 400, the bearing 44 is installed in the first mounting hole 400 of the mounting base 40. The cutting portion 4 can rotate around the center line of the bearing 44 with the center line to the adjustment hole 4041 as the radius, so as to change the fastening position of the adjustment hole 4041 and the positioning hole 201, thereby realizing the angle between the cutting portion 4 and the transmission portion 2. The sprocket 42 is fixed on the transmission shaft 21 of the transmission portion 2 and rotates with the rotation of the transmission shaft 21, and then drives the chain cutter 43 on the sprocket 42 to rotate. The spacer 45 is disposed between the sprocket 42 and the bearing 44, which plays a role of isolating the bearing 44 and the sprocket 42, preventing damage to the mounting base 40 and the sprocket 42 due to contact friction when the adjustment hole 4041 on the mounting base 40 switches the fastening position with the positioning hole 20 on the transmission portion 2. In addition, the spacer 45 disposed between the sprocket 42 and the bearing 44 can also avoid interference between the mounting base 40 and the chain cutter on the sprocket 42 when the mounting base 40 rotates. The end plate 46 makes the sprocket 42 stuck on the transmission shaft 21, avoiding the problem of unstable cutting of the graded crushed stone 5 caused by the axial movement of the sprocket 42 along the transmission shaft 21.

[0060] It should be noted that there is no limit to the limiting method of the sprocket 42. The end plate 46 can be the end plate shown in the figure of the present application, and the screw passes through the end plate and is connected to the transmission shaft 21; the end plate 46 can also be a snap ring, and the snap ring can also limit the sprocket 42 to avoid the axial movement of the sprocket 42 along the transmission shaft 21.

[0061] The various embodiments / implementations provided in this application can be combined with each other without conflict.

[0062] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A chain saw for the treatment of the arching of the ballastless track subgrade, used to cut the graded gravel under the ballastless track support layer. Characterized in that: The chain saw includes a power unit (1), a transmission unit (2), a traction unit (3) and a cutting unit (4). One power unit (1), one transmission unit (2) and one traction unit (3) are respectively arranged at both ends of the cutting unit (4). Each power unit (1) is drivingly connected to the corresponding transmission unit (2) and the traction unit (3) at its end. The two transmission units (2) are respectively drivingly connected to the cutting unit (4). The cutting unit (4) includes a mounting seat (40), a chain plate (41), a sprocket (42) and a cutting chain (43). The two mounting seats (40) are respectively connected to one transmission unit (2). Both ends of the chain plate (41) are respectively connected to one mounting seat (40). The two sprockets (42) are respectively drivingly connected to one transmission unit (2). The cutting chain (43) is tensioned on the chain plate (41), and the cutting chain (43) meshes with the two sprockets (42) for transmission. Wherein, the sprocket (42) and the cutting chain (43) are installed below the transmission unit (2). The two power units (1), the two transmission units (2) and the two traction units (3) are respectively used to be arranged on both sides of the support layer. The cutting unit (4) is used to be arranged transversely along the support layer to transversely cut the graded gravel under the support layer. The traction unit (3) is used to tow the chain saw to move forward longitudinally along the ballastless track. An adjustment hole (4041) is formed on the mounting seat (40), and at least two positioning holes (20) are formed on the transmission unit (2). By changing the fastening connection between the adjustment hole (4041) and different positioning holes (20), the installation angle of the cutting unit (4) relative to the transmission unit (2) is adjusted. The chain plate (41) includes: An outer chain plate (410); Inner chain plates (411), one end of each of the two inner chain plates (411) is respectively connected to the corresponding mounting seat (40); and Adjusting members (412), the other ends of the two inner chain plates (411) are respectively connected to both ends of the outer chain plate (410) through one adjusting member (412). The adjusting member (412) is used to adjust the installation position of the inner chain plate (411) and the outer chain plate (410) to adjust the tension of the cutting chain (43). One end of the mounting seat (40) forms a first mounting hole (400). The mounting seat (40) is connected to the transmission unit (2) through the first mounting hole (400). The other end of the mounting seat (40) forms two limiting plates (403), as well as a convex shaft (402) and a second mounting hole (401) located between the two limiting plates (403). One end of the inner chain plate (411) close to the mounting seat (40) forms a third mounting hole (4113) corresponding to the second mounting hole (401) and a shaft hole (4112) corresponding to and matching the convex shaft (402). The inner link plate (411) is installed between the two limit plates (403), the convex shaft (402) is inserted into the shaft hole (4112), and the second mounting hole (401) is fixedly connected to the third mounting hole (4113).

2. The chain saw according to claim 1, wherein, a receiving hole (4111) is formed on the inner link plate (411), a stop portion (41111) is formed on the side wall of the receiving hole (4111), and the stop portion (41111) divides the receiving hole (4111) into a first receiving portion (41112) and a second receiving portion (41113) that communicate with each other; accommodation cavities (4101) with open ends are respectively formed at both ends of the outer link plate (410), and limiting holes (4102) communicating with the accommodation cavities (4101) are formed, and one end of the inner link plate (411) away from the mounting base (40) is accommodated in the accommodation cavity (4101); the adjusting member (412) includes an adjusting rod (4121) and a limiting pin (4122) having a threaded hole (41221), the adjusting rod (4121) includes a rod head (41211) and a screw rod (41212) connected to the rod head (41211), a step (412112) is formed between the rod head (41211) and the screw rod (41212), the adjusting rod (4121) is arranged in the receiving hole (4111), wherein the rod head (41211) is located in the first receiving portion (41112), the screw rod (41212) is located in the second receiving portion (41113), the stop portion (41111) restricts the rod head (41211) from moving towards the second receiving portion (41113), the limiting pin (4122) is inserted into the limiting hole (4102), and the screw rod (41212) is connected to the threaded hole (41221).

3. The chain saw according to claim 2, wherein, an adjusting opening (4103) communicating with the first receiving portion (41112) is formed on the outer link plate (410), and a plurality of adjusting holes (412111) are formed on the rod head (41211), and the plurality of adjusting holes (412111) are spaced apart along the circumferential direction of the rod head (41211).

4. The chain saw according to claim 1, wherein, the outer link plate (410) includes two oppositely arranged vertical plates (4104) and two horizontal plates (4105) connected between the two vertical plates (4104), two guiding grooves (4106) and a cavity (4107) located between the two guiding grooves (4106) are formed between the two horizontal plates (4105) and the two vertical plates (4104), and at least a part of the chain (43) is accommodated in the guiding grooves (4106).

5. The chain saw according to claim 4, wherein, The outer link plate (410) further includes reinforcing ribs (4108), and a plurality of the reinforcing ribs (4108) are arranged at intervals in the cavity (4107), and the reinforcing ribs (4108) are connected to the vertical plate (4104) and / or the horizontal plate (4105).

6. The chain saw according to claim 1, characterized in that, One end of the mounting seat (40) away from the first mounting hole (400) is bent away from the convex shaft (402) to form a clamping portion (404), the adjustment hole (4041) is formed in the clamping portion (404), and the clamping portion (404) is clamped on the transmission portion (2).

7. The chain saw according to claim 1, characterized in that, The sprocket (42) is located outside the mounting seat (40), the cutting portion (4) further includes a bearing (44) arranged in the first mounting hole (400), a spacer (45) arranged between the sprocket (42) and the bearing (44), and an end plate (46) arranged outside the sprocket (42). The transmission shaft (21) of the transmission portion (2) passes through the bearing (44), the first mounting hole (400), the spacer (45) and the sprocket (42), and the end plate (46) limits the sprocket (42).

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