阅读说明：本技术 一种链锯 (Chain saw ) 是由 何新辉 陈占 高松松 彭志鹏 崔国庆 陈仕奇 陈侃 丁绍华 李丹 汪春燕 李松龄 于 2020-06-02 设计创作，主要内容包括：本申请实施例提供一种链锯,包括动力部、传动部、牵引部和切割部,切割部的两端分别设置一动力部、一传动部和一牵引部,每端动力部驱动连接对应端的传动部和牵引部,两传动部分别与切割部驱动连接；切割部包括安装座、链板、链轮和截链,两安装座分别与一传动部连接,链板的两端分别与一安装座连接,两链轮分别与一传动部驱动连接,截链张紧在链板上,截链与两链轮啮合传动。此链锯对无砟轨道支承层下方的级配碎石进行切割,动力部、传动部以及牵引部分别设置在支承层的两侧,切割部沿支承层横向设置,并由牵引部牵引链锯沿纵向前行。由于切割部的截链厚度可以根据需要进行调整,能一次性完成对路基上拱区级配碎石的切割,因此提高了施工效率。(The embodiment of the application provides a chain saw, which comprises a power part, a transmission part, a traction part and a cutting part, wherein the two ends of the cutting part are respectively provided with the power part, the transmission part and the traction part; the cutting part comprises mounting seats, chain plates, chain wheels and chain cutting parts, the two mounting seats are respectively connected with a transmission part, two ends of each chain plate are respectively connected with one mounting seat, the two chain wheels are respectively in driving connection with the transmission part, the chain cutting parts are tensioned on the chain plates, and the chain cutting parts are in meshing transmission with the two chain wheels. The chain saw is used for cutting graded broken stones below a supporting layer of a ballastless track, the power part, the transmission part and the traction part are respectively arranged on two sides of the supporting layer, the cutting part is arranged transversely along the supporting layer, and the chain saw is dragged by the traction part to move forwards longitudinally. Because the chain cutting thickness of the cutting part can be adjusted as required, the cutting of graded broken stones in an upper arch area of the roadbed can be completed at one time, and therefore the construction efficiency is improved.)

1. A chain saw is characterized by comprising a power part (1), a transmission part (2), a traction part (3) and a cutting part (4), wherein the power part (1), the transmission part (2) and the traction part (3) are respectively arranged at two ends of the cutting part (4), the power part (1) at each end is in driving connection with the transmission part (2) and the traction part (3) at the corresponding end, and the two transmission parts (2) are respectively in driving connection with the cutting part (4);

cutting portion (4) include mount pad (40), link joint (41), sprocket (42) and cut chain (43), two mount pads (40) respectively with one transmission portion (2) are connected, the both ends of link joint (41) respectively with one mount pad (40) are connected, two sprocket (42) respectively with one transmission portion (2) drive is connected, it is in to cut chain (43) tensioning link joint (41) are last, cut chain (43) and two sprocket (42) meshing transmission.

2. The chain saw as recited in claim 1, wherein an adjustment hole (4041) is formed on the mounting seat (40), and at least two positioning holes (20) are formed on the transmission portion (2), and the mounting angle of the cutting portion (4) with respect to the transmission portion (2) is adjusted by changing the fastening connection of the adjustment hole (4041) with different positioning holes (20).

3. The chain saw according to claim 1, wherein the link plate (41) comprises:

an outer link plate (410);

one end of each of the two inner chain plates (411) is connected with the corresponding mounting seat (40); and

adjusting part (412), two the other end of inner link plate (411) is respectively through one adjusting part (412) are connected the both ends of outer link plate (410), adjusting part (412) are used for adjusting inner link plate (411) with the mounted position of outer link plate (410), with right the rate of tension of cutting chain (43) is adjusted.

4. The chain saw according to claim 3, wherein the inner link plate (411) is formed with a receiving hole (4111), a stopper portion (41111) is formed on a side wall of the receiving hole (4111), and the stopper portion (41111) divides the receiving hole (4111) into a first receiving portion (41112) and a second receiving portion (41113) which communicate with each other;

an accommodating cavity (4101) with an opened end part and a limiting hole (4102) communicated with the accommodating cavity (4101) are respectively formed at two ends of the outer chain plate (410), and one end of the inner chain plate (411) far away from the mounting seat (40) is accommodated in the accommodating cavity (4101);

the adjusting member (412) comprises an adjusting rod (4121) and a limit pin (4122) with a threaded hole (41221), the adjusting rod (4121) comprises a rod head (41211) and a screw rod (41212) connected with 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 accommodating hole (4111), the rod head (41211) is positioned in the first accommodating part (41112), the screw rod (41212) is positioned in the second accommodating part (41113), the limit part (41111) limits the movement of the rod head (41211) towards the second accommodating part (41113), the limit pin (4122) is arranged in the limit hole (4102) in a penetrating manner, and the screw rod (41212) is connected with the threaded hole (41221).

5. The chain saw as recited in claim 4, wherein the outer link plate (410) is formed with an adjustment opening (4103) communicating with the first accommodation portion (41112), and the head (41211) is formed with a plurality of adjustment holes (412111), the plurality of adjustment holes (412111) being spaced apart along a circumferential direction of the head (41211).

6. A chain saw according to claim 3, wherein the outer link plate (410) comprises two upright plates (4104) arranged opposite to each other and two transverse plates (4105) connected between the two upright plates (4104), two guide grooves (4106) and a cavity (4107) between the two guide grooves (4106) are formed between the two transverse plates (4105) and the two upright plates (4104), and the chain segment (43) is at least partially accommodated in the guide grooves (4106).

7. The chain saw of claim 6, wherein the outer link plate (410) further comprises a reinforcing rib (4108), a plurality of the reinforcing ribs (4108) are arranged in the cavity (4107) at intervals, and the reinforcing rib (4108) is connected with the vertical plate (4104) and/or the horizontal plate (4105).

8. The chain saw as recited in claim 3, wherein a first mounting hole (400) is formed at one end of the mounting seat (40), the mounting seat (40) is connected with the transmission part (2) through the first mounting hole (400), two limit plates (403) are formed at the other end of the mounting seat (40), and a protruding shaft (402) and a second mounting hole (401) are formed between the two limit plates (403);

a third mounting hole (4113) corresponding to the second mounting hole (401) and a shaft hole (4112) correspondingly matched with the convex shaft (402) are formed at one end, close to the mounting seat (40), of the inner chain plate (411);

inner link board (411) are installed two between limiting plate (403), protruding axle (402) insert shaft hole (4112), second mounting hole (401) with third mounting hole (4113) fastening connection.

9. The chain saw as recited in claim 8, wherein an end of the mounting base (40) away from the first mounting hole (400) is bent to a side away from the protruding shaft (402) to form a catching portion (404), the adjusting hole (4041) is formed on the catching portion (404), and the catching portion (404) is caught on the transmission portion (2).

10. The chain saw as recited in claim 8, wherein the sprocket (42) is located outside the mounting seat (40), the cutting portion (4) further comprises a bearing (44) disposed in the first mounting hole (400), a spacer (45) disposed between the sprocket (42) and the bearing (44), and a shaft end plate (46) disposed outside the sprocket (42), the transmission shaft (21) of the transmission portion (2) is inserted through the bearing (44), the first mounting hole (400), the spacer (45), and the sprocket (42), and the shaft end plate (46) limits the sprocket (42).

Technical Field

The utility model belongs to the track engineering field especially relates to a chain saw that is used for unballasted track road bed to arch improvement.

Background

In a ballastless track structure of a high-speed railway, a roadbed arching disease phenomenon easily occurs, and the existing arching disease treatment method can be realized aiming at the condition of small arching amount, for example, track fasteners are adjusted, aiming at the condition of large arching amount, an original track is generally required to be dismantled to fill the roadbed again, or a rope saw is adopted to carry out cutting for multiple times, the cutting cannot be completed at one time, the treatment efficiency is low, and a large amount of manpower, material resources and financial resources are required to be consumed.

Disclosure of Invention

In view of this, the embodiments of the present application are expected to provide a chain saw, which solves the problems of low efficiency and high cost in the arching treatment of a ballastless track subgrade.

In order to achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

the chain saw comprises a power part, a transmission part, a traction part and a cutting part, wherein the power part, the transmission part and the traction part are respectively arranged at two ends of the cutting part;

the cutting part comprises mounting seats, chain plates, chain wheels and chain cutting parts, the two mounting seats are respectively connected with the transmission part, two ends of each chain plate are respectively connected with one of the mounting seats, the two chain wheels are respectively in driving connection with the transmission part, the chain cutting parts are tensioned on the chain plates, and the chain cutting parts are in meshing transmission with the two chain wheels.

Furthermore, an adjusting hole is formed in the cutting part, at least two positioning holes are formed in the transmission part, and the installation angle of the cutting part relative to the transmission part is adjusted by changing the fastening connection of the adjusting hole and different positioning holes.

Further, the link plate includes:

an outer link plate;

one end of each of the two inner chain plates is connected with the corresponding mounting seat; and

the regulating part, two the other end of inner chain plate is connected through one respectively the regulating part is in the both ends of outer chain plate, the regulating part is used for adjusting the inner chain plate with the mounted position of outer chain plate is with right the rate of tension of cutting the chain is adjusted.

Furthermore, an accommodating hole is formed in the inner chain plate, a stop part is formed on the side wall of the accommodating hole, and the stop part divides the accommodating hole into a first accommodating part and a second accommodating part which are communicated;

an accommodating cavity with an opening at the end part and a limiting hole communicated with the accommodating cavity are formed at two ends of the outer chain plate respectively, and one end of the inner chain plate, which is far away from the mounting seat, is accommodated in the accommodating cavity;

the adjusting part comprises an adjusting rod and a limiting pin with a threaded hole, the adjusting rod comprises a rod head and a screw rod connected with the rod head, a step is formed between the rod head and the screw rod, the adjusting rod is arranged in the accommodating hole, the rod head is arranged in the first accommodating part, the screw rod is arranged in the second accommodating part, the stop part limits the rod head to move towards the second accommodating part, the limiting pin penetrates through the limiting hole, and the screw rod is connected with the threaded hole.

Furthermore, an adjusting opening communicated with the first accommodating part is formed in the outer chain plate, a plurality of adjusting holes are formed in the rod head, and the adjusting holes are distributed at intervals along the circumferential direction of the rod head.

Furthermore, the outer chain plate comprises two vertical plates and two transverse plates, the two vertical plates are oppositely arranged, the two transverse plates are connected between the two vertical plates, two guide grooves and a cavity located between the two guide grooves are formed between the two transverse plates and the two vertical plates, and the chain block is at least partially accommodated in the guide grooves.

Furthermore, the outer chain plate further comprises reinforcing ribs, the reinforcing ribs are arranged in the cavity at intervals, and the reinforcing ribs are connected with the vertical plate and/or the transverse plate.

Furthermore, a first mounting hole is formed at one end of the mounting seat, the mounting seat is connected with the transmission part through the first mounting hole, and two limiting plates, a protruding shaft and a second mounting hole are formed at the other end of the mounting seat;

a third mounting hole corresponding to the second mounting hole and a shaft hole correspondingly matched with the convex shaft are formed at one end, close to the mounting seat, of the inner chain plate;

the inner chain plate is installed between the two limiting plates, the protruding shaft is inserted into the shaft hole, and the second mounting hole is tightly connected with the third mounting hole.

Further, the one end that the mount pad was kept away from first mounting hole is to keeping away from one side of protruding axle is buckled and is formed joint portion, the adjustment hole forms in the joint portion, joint portion joint is in the transmission portion.

Further, the sprocket is located the mount pad outside, cutting portion is still including setting up bearing in the first mounting hole, set up in the sprocket with spacer between the bearing and set up in the axle head plate in the sprocket outside, the transmission shaft of drive division wears to establish the bearing first mounting hole in the spacer in the sprocket, the axle head plate is right the sprocket carries on spacingly.

The chain saw provided by the embodiment of the application is used for arching and repairing construction on a ballastless track roadbed, graded broken stones below a ballastless track supporting layer are cut, the two power parts, the two transmission parts and the two traction parts are respectively arranged on two sides of the supporting layer, the cutting parts are transversely arranged along the supporting layer, the two power parts respectively drive the two transmission parts, the two transmission parts drive the cutting parts to transversely cut the graded broken stones below the supporting layer, and the traction parts pull the chain saw to longitudinally advance along the ballastless track. Because the chain cutting thickness of the cutting part can be adjusted as required, the cutting of graded broken stones in an upper arch area of the roadbed can be completed at one time, the construction time is shortened, and the construction efficiency is improved.

Drawings

FIG. 1 is a schematic view of a chain saw according to an embodiment of the present disclosure;

FIG. 2 is a partial schematic view of a chain saw illustrating a link plate and drive portion mounting arrangement in accordance with an embodiment of the present application;

FIG. 3 is a rear enlarged partial view of FIG. 1 at A;

FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 3;

FIG. 5 is a schematic view of an inner link plate of a chain saw according to an embodiment of the present application;

FIG. 6 is a schematic view of an adjustment member of a chain saw according to an embodiment of the present disclosure;

FIG. 7 is a schematic view of an outer link plate of a chain saw according to an embodiment of the present application;

FIG. 8 is a schematic cross-sectional view taken along line D-D of FIG. 1;

FIG. 9 is a schematic view from a perspective of a mounting block in a chain saw according to an embodiment of the present application;

FIG. 10 is a schematic view of a mounting block in a chain saw of an embodiment of the present application from another perspective; and

fig. 11 is a schematic structural diagram of a chain saw applied to arch-up renovation construction of a ballastless track subgrade according to an embodiment of the present application.

Description of reference numerals:

1. a power section; 2. a transmission section; 20. positioning holes; 21. a drive shaft; 3. a traction part; 4. a cutting section; 40. a mounting seat; 400. a first mounting hole; 401. a second mounting hole; 402. a protruding shaft; 403. a limiting plate; 404. a clamping part; 4041. an adjustment hole; 41. a chain plate; 410. an outer link plate; 4101. an accommodating chamber; 4102. a limiting hole; 4103. adjusting the opening; 4104. a vertical plate; 4105. horizontal edition; 4106. a guide groove; 4107. a cavity; 4108. reinforcing ribs; 411. an inner link plate; 4111. an accommodation hole; 41111. a stopper portion; 41112. a first accommodating portion; 41113. a second accommodating portion; 4112. a shaft hole; 4113. a third mounting hole; 412. an adjustment member; 4121. adjusting a rod; 41211. a club head; 412111, adjusting holes; 412112, steps; 41212. a screw; 4122. a spacing pin; 41221. a threaded hole; 42. a sprocket; 43. chain cutting; 44. a bearing; 45. a spacer; 46. a shaft end plate; 5. grading broken stone; 6. a ballastless track; 61. a track plate; 62. a support layer; 63. an end beam; 7. a traveling groove; 8. drawing the pile; 9. and (7) a working groove.

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

In the description of the present application, the "front" and "rear" orientations or positional relationships are based on the orientation shown in fig. 1, the "upper" and "lower" orientations are based on the orientation shown in fig. 8, the "horizontal" orientation is based on the orientation shown in fig. 11, and the "vertical" orientation is along the ballastless track. It is to be understood that such directional terms are merely for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application.

Aiming at the ballastless track roadbed upwarp defect, a common treatment method is to restore the smoothness of a ballastless track line through fastener adjustment, but the adjustment capability of the fastener to upwarp deformation is small, when the upwarp amount exceeds the fastener adjustment capability, other modes are required to be adopted for treatment so as to restore the elevation of the ballastless track, in addition, the workload is large during adjustment, the labor is consumed, and therefore, the efficiency is low, and the cost is high. The other method is to manually remove the original ballastless track structure and then fill the roadbed, and the method has the advantages of long construction time, low efficiency and high treatment cost.

In view of this, the chain saw provided in the embodiment of the present application is applied to a ballastless track subgrade arching treatment construction, please refer to fig. 1, and includes a power portion 1, a transmission portion 2, a traction portion 3 and a cutting portion 4, where two ends of the cutting portion 4 are respectively provided with the power portion 1, the transmission portion 2 and the traction portion 3, the power portion 1 at each end is connected to the transmission portion 2 and the traction portion 3 at the corresponding end in a driving manner, and the two transmission portions 2 are respectively connected to the cutting portion 4 in a driving manner; the cutting part 4 comprises mounting seats 40, chain plates 41, chain wheels 42 and a chain intercepting part 43, wherein the two mounting seats 40 are respectively connected with a transmission part 2, two ends of each chain plate 41 are respectively connected with one mounting seat 40, the two chain wheels 42 are respectively connected with the transmission part 2 in a driving mode, the chain intercepting part 43 is tensioned on the chain plates 41, and the chain intercepting part 43 is in meshing transmission with the two chain wheels 42.

Referring to fig. 11, the two power portions 1 respectively drive the two transmission portions 2, the two transmission portions 2 drive the sprockets 42 of the cutting portion 4, the chain cutter 43 engaged with the sprockets 42 is driven by the rotation of the two sprockets 42, the graded crushed stone 5 below the supporting layer 62 is transversely cut by the rotation of the chain cutter 43, and the chain saw is pulled by the traction portion 3 to advance along the ballastless track 6 in the longitudinal direction. Because the two ends of the cutting part 4 are provided with the power parts 1, the effective cutting length of the chain saw is increased, and the chain saw can be used for cutting objects with large width. Meanwhile, the thickness of the chain block 43 of the cutting part 4 can be adjusted as required, the cutting of graded broken stones 5 in the arching area on the roadbed can be completed at one time, and the problems that the arching amount of the ballastless track 6 on the roadbed is large and multiple times of cutting are needed are solved, so that the construction time is shortened, and the construction efficiency is improved.

Continuing to refer to fig. 11, before treating the roadbed upper arch defect of the ballastless track 6, a constructor installs a power part 1, a transmission part 2 and a traction part 3 as a whole, moves into a traveling groove 7 at one side of the ballastless track 6 in an upper arch section treatment area, installs another power part 1, a transmission part 2 and a traction part 3 as another whole, moves into a traveling groove 7 at the other side of the ballastless track 6 in the upper arch section treatment area, then lays a cutting part 4 at a working groove 9, and connects two ends of the cutting part 4 with the power part 1, the transmission part 2 and the traction part 3 which are installed as a whole at two sides of the ballastless track 6 respectively. The traction part 3 is connected with the traction pile 8, so that the traction part 3 can be used for driving the chain saw to directionally move forwards, the upwarp amount needs to be measured before the ballastless track 6 upwarp is cured, and the cutting chain 43 with the corresponding thickness is replaced according to the upwarp amount so that the cutting chain 43 can cut graded crushed stones 5 at one time. When the ballastless track 6 is used for treating the arch-up disease, the two power parts 1 respectively drive the two transmission parts 2, the two transmission parts 2 drive the cutting parts 4 to transversely cut the graded broken stones 5 below the supporting layer 62, and the traction part 3 pulls the chain saw to longitudinally advance along the ballastless track 6. The problems that the ballastless track 6 is large in arching amount on the roadbed and needs to be cut for multiple times are solved, so that the cutting time is shortened, and the cutting efficiency is improved. Wherein, the rotation of cutting chain 43 is by two power portions 1 indirect drive simultaneously, and power is sufficient, has guaranteed sufficient cutting dynamics, has ensured the stability of cutting graded broken stone 5.

In the related art, the support layer 62 of the ballastless track 6 of the arching section is repaired by the rope saw, and the support layer 62 is of a concrete structure and has high hardness, so that the construction is extremely difficult, the construction efficiency is low, and the construction time is long. The chain saw is used for cutting graded broken stones 5 in a roadbed of a ballastless track 6, the hardness of the graded broken stones 5 is small, the cutting is easy, and the graded broken stones 5 do not belong to the ballastless track 6, so that the structural strength and the stability of the ballastless track 6 are not easily influenced. In the embodiments of the present application, the cutting objects of the chain saw are graded crushed stones 5, and the description thereof is omitted.

In one embodiment, the power part 1 may be an explosion-proof motor, and the transmission part 2 may be a gearbox. The power output by the explosion-proof motor is converted into the required rotating speed through the gearbox, and drives the chain block 43 engaged with the chain wheel 42 to rotate.

In one embodiment, the sprocket 43 may be selected as a five star sprocket, i.e., the sprocket 43 includes 5 meshing teeth, which facilitates the design of the chain 43. It will be appreciated that the sprocket 43 may also include other pluralities of meshing teeth, such as 4 or 6. In particular, the sprocket 42 may be mounted below the transmission part 2. The installation position of the chain wheel 42 determines the installation position of the chain block 43, so that the chain block 43 is also installed below the two transmission parts 2, the chain block 43 is beneficial to cutting the graded broken stone 5 close to the lower part of the supporting layer 62, and the graded broken stone 5 in a deeper part does not need to be cut, so that the excavation depth of the working groove 9 can be reduced, the construction time is shortened, and the construction cost is reduced.

In one embodiment, the chain block 43 includes a plurality of picks connected in a ring, each of which may include a plurality of cutting blades thereon for cutting an object to be cut, such as graded crushed stone. The plurality of cutting picks are detachably connected, so that the damaged cutting picks or blades can be conveniently repaired and replaced.

In an embodiment, referring to fig. 2, an adjusting hole 4041 is formed on the mounting base 40, at least two positioning holes 20 are formed on the transmission portion 2, and the mounting angle of the cutting portion 4 relative to the transmission portion 2 is adjusted by changing the fastening connection between the adjusting hole 4041 and different positioning holes 20. The angle between the cutting part 4 and the ballastless track 6 can be changed by adjusting the installation angle of the cutting part 4 relative to the transmission part 2, so that the change of the cutting direction of the cutting part 4 is finally realized, and the cutting requirements of different projects are met by changing the change of the cutting angle of the cutting part 4.

It is understood that the number of the positioning holes 20 is not limited, and the number of the positioning holes 20 circumferentially distributed on the transmission part 2 may be any number, and depending on the engineering, if the angle between the cutting part 4 and the transmission part 2 needs to be changed very finely, a plurality of positioning holes 20 may be arranged circumferentially on the flange edge of the transmission part 2, and conversely, a few positioning holes 20 may be arranged.

Specifically, in an embodiment, referring to fig. 2, in the chainsaw of the present application, four positioning holes 20 may be circumferentially distributed on the transmission portion 2 every 90 °, and after one of the positioning holes 20 is tightly connected to the adjustment hole 4041, two of the positioning holes 20 are tightly connected to the adjustment hole 4041, so that the cutting portion 4 and the transmission portion 2 form different angles, which are 90 ° and 270 °, respectively. When the cutting part 4 is at 90 degrees to the transmission part 2, the chain saw cuts graded crushed stone 5 along the longitudinal direction of the ballastless track 6; when the cutting section 4 is at 270 ° to the drive section 2, the chain saw cuts graded crushed stone 5 in the longitudinal direction of the ballastless track 6 in the opposite direction. By changing the cutting angle of the cutting part 4, the chain saw can flexibly change the cutting direction so as to meet the requirements of different cutting angles of the project.

In an embodiment, referring to fig. 3, the link plate 41 includes an outer link plate 410, inner link plates 411 and adjusting members 412, one end of each of the inner link plates 411 is connected to the corresponding mounting seat 40, the other end of each of the inner link plates 411 is connected to the two ends of the outer link plate 410 through an adjusting member 412, and the adjusting members 412 are used for adjusting the mounting positions of the inner link plates 411 and the outer link plates 410 to adjust the tension of the chain block 43. The installation positions of the inner chain plates 411 and the outer chain plates 410 are adjusted through the adjusting pieces 412, so that the length of the chain plates 41 is changed, the tension degree of the chain intercepting 43 is adjusted, and therefore the chain intercepting 43 is guaranteed to have enough force in cutting the graded crushed stones 5, and even and stable cutting is achieved.

In an embodiment, referring to fig. 4, 5, 6 and 7, the inner link plate 411 is formed with a receiving hole 4111, a stop portion 41111 is formed on a 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 which are communicated with each other. Both ends of the outer link plate 410 are formed with an accommodation chamber 4101 having an open end and a stopper hole 4102 communicating with the accommodation chamber 4101, respectively. An end of the inner link plate 411 remote from the mounting seat 40 is accommodated in the accommodation chamber 4101. The adjusting member 412 includes an adjusting rod 4121 and a limit pin 4122 having a threaded hole 41221, the adjusting rod 4121 includes a rod head 41211 and a screw 41212 connected to the rod head 41211, a step 412112 is formed between the rod head 41211 and the screw 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, the screw 41212 is located in the second receiving portion 41113, the stop portion 41111 limits the movement of the rod head 41211 toward the second receiving portion 41113, the limit pin 4122 is inserted into the limit hole 4102, and the screw 41212 is connected to the threaded hole 41221.

It can be understood that, by rotating the screw 41212 of the adjusting rod 4121 in the screw hole 41221 of the limit pin 4122, the length of the screw 41212 screwed into the screw hole 41221 can be adjusted, because 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, 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, so that the length of the screw 41212 screwed into the screw hole 41221 is equivalent to adjusting the installation distance between the inner link plate 411 and the outer link plate 410, and further adjusting the tension of the chain intercept 43, and the sufficient tension can make the chain intercept 43 have sufficient force to cut the graded crushed stone, thereby achieving the effect of uniform and stable cutting. In addition, the stopper 41111 abuts against the step 412112 formed between the rod head 41211 and the screw 41212, so as to limit the movement of the rod head 41211 toward the second accommodating portion 41113, thereby preventing the adjustment rod 4121 from sliding freely 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 freely, and finally ensuring the uniform tension between the inner link plate 411 and the outer link plate 410 and the stability of the cutting portion 4 in cutting graded crushed stones 5.

In an embodiment, referring to fig. 4, 5, 6 and 7, the outer link plate 410 is formed with an adjustment opening 4103 communicating with the first accommodation portion 41112, the rod head 41211 is formed with a plurality of adjustment holes 412111, and the plurality of adjustment holes 412111 are spaced apart along the circumference of the rod head 41211. The adjusting opening 4103 communicating with the first accommodating portion 41112 is formed on the outer link plate 410, so that an operating space for a constructor to insert an adjusting tool into the adjusting hole 412111 is provided, and the length of the screw 41212 screwed into the stopper pin 4122 is adjusted by screwing the adjusting lever 4121 with the adjusting tool. The plurality of adjustment holes 412111 are spaced circumferentially around the rod end 41211 to facilitate providing the adjustment tool with a plurality of orientation adjustment screws 41212 to prevent one adjustment hole 412111 from being obscured by the outer link plate 410 and not accessible to the adjustment tool when only one adjustment hole 412111 is present.

In one embodiment, referring to fig. 7, the outer link plate 410 includes two vertical plates 4104 disposed opposite to each other and two horizontal plates 4105 connected between the two vertical plates 4104, two guide slots 4106 and a cavity 4107 between the two guide slots 4106 are formed between the two horizontal plates 4105 and the two vertical plates 4104, and the chain segment 43 is at least partially accommodated in the guide slots 4106. The two guiding slots 4106 formed between the two horizontal plates 4105 and the two vertical plates 4104 not only facilitate the directional rotation of the chain block 43 along the guiding slots 4106, but also ensure the chain block 43 to have a uniform tension when the chain block 43 is installed in the guiding slots 4106. Wherein the chain 43 is at least partially accommodated in the guide groove 4106, and the other part is tensioned on the sprocket 42.

In one embodiment, referring to fig. 3 and 8, since the chain saw cuts the graded crushed stone 5 with a larger width, the chain intercepting chain 43 in the contact part with the graded crushed stone 5 is also longer, the longer working chain intercepting chain 43 needs a sufficient cutting force, and the chain intercepting chain 43 is installed in the guide groove 4106 of the outer chain plate 410, the outer chain plate 410 mainly bears the bearing force of the chain intercepting chain 43, and in order to better perform the bearing function and strengthen the strength of the outer chain plate 410, the outer chain plate 410 further comprises a reinforcing rib 4108, a plurality of reinforcing ribs 4108 are arranged in the cavity 4107 at intervals, and the reinforcing rib 4108 is connected with the vertical plate 4104 and/or the transverse plate.

In an embodiment, referring to fig. 4, 5 and 10, a first mounting hole 400 is formed at one end of the mounting seat 40, the mounting seat 40 is connected to the transmission part 2 through the first mounting hole 400, and two limiting plates 403, and a protruding shaft 402 and a second mounting hole 401 are formed at the other end of the mounting seat 40 and located between the two limiting plates 403; a third mounting hole 4113 corresponding to the second mounting hole 401 and a shaft hole 4112 correspondingly matched with the protruding shaft 402 are formed at one end, close to the mounting seat 40, of the inner chain plate 411; the inner chain plate 411 is installed between two limit plates 403, the protruding shaft 402 is inserted into the shaft hole 4112, and the second mounting hole 401 is tightly connected with the third mounting hole 4113.

In an embodiment, referring to fig. 2 and fig. 9, an end of the mounting base 40 away from the first mounting hole 400 is bent to a side away from the protruding shaft 402 to form a clamping portion 404, the adjusting hole 4041 is formed on the clamping portion 404, and the clamping portion 404 is clamped on the transmission portion 2. Because the protruding shaft 402 and the second mounting hole 401 are arranged between the two limiting plates 403, in order to avoid interference with the protruding shaft 402 and the second mounting hole 401 when the adjusting hole 4041 is fastened with the transmission part 2, the adjusting hole 4041 is bent to form the clamping part 404, and the adjusting hole 4041 is formed on the clamping part 404 to play a role of staggered fastening. In addition, bend and form joint portion 404 and be favorable to the ring flange card of transmission portion 2 in joint portion 404, play the effect of location, and installation convenient operation. The clip portion 404 may be integrally formed with the main body of the mounting base 40, or may be mounted on the main body of the mounting base 40 by a fastener.

In an embodiment, referring to fig. 4, the sprocket 42 is located outside the mounting seat 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 a shaft end plate 46 disposed outside the sprocket 42, the transmission shaft 21 of the transmission portion 2 is disposed through the bearing 44, the first mounting hole 400, the spacer 45, and the sprocket 42, and the shaft end plate 46 limits the sprocket 42.

The bearing 44 is arranged in the first mounting hole 400 of the mounting seat 40 through the bearing 44 in the first mounting hole 400, the cutting part 4 can rotate around the rotating shaft by taking the central line of the bearing 44 as the rotating shaft and taking the central line to the adjusting hole 4041 as the radius, and the fastening position of the adjusting hole 4041 and the positioning hole 20 is changed, so that the angle between the cutting part 4 and the transmission part 2 is realized. The sprocket 42 is fixed on the transmission shaft 21 of the transmission part 2 and rotates along with the rotation of the transmission shaft 21, so as to drive the chain 43 on the sprocket 42 to rotate. The spacer 45 is provided between the sprocket 42 and the bearing 44, and plays a role of isolating the bearing 44 from the sprocket 42, so as to prevent the mounting seat 40 and the sprocket 42 from being damaged due to contact friction when the adjusting hole 4041 on the mounting seat 40 is switched to the fastening position with the positioning hole 20 on the transmission part 2, and in addition, the spacer 45 is provided between the sprocket 42 and the bearing 44, so that interference with chain cutting on the sprocket 42 when the mounting seat 40 rotates can be avoided. The shaft end plate 46 enables the chain wheel 42 to be clamped on the transmission shaft 21, and the problem that the chain wheel 42 moves axially along the transmission shaft 21 to cause instability of the chain cutter 43 in cutting graded crushed stones 5 is avoided.

It should be noted that, the limiting manner of the sprocket 42 is not limited, and the shaft end plate 46 may be an end plate in the illustration of the present application, and is connected with the transmission shaft 21 by screws penetrating through the end plate; the end plate 46 may also be a snap ring, which also limits the sprocket 42 to prevent the sprocket 42 from moving axially along the shaft 21.

The various embodiments/implementations provided herein may be combined with each other without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.