CN111676743A - a chain saw - Google Patents

Abstract

An embodiment of the present application provides a chain saw, which includes a power part, a transmission part, a traction part and a cutting part. Two ends of the cutting part are respectively provided with a power part, a transmission part and a traction part. The transmission part and the traction part, the two transmission parts are respectively drivingly connected with the cutting part; the cutting part includes a mounting seat, a chain plate, a sprocket and a cutting chain, the two mounting seats are respectively connected with a transmission part, and the two ends of the chain plate are respectively connected with a mounting seat The base is connected, the two sprockets are respectively drivingly connected with a transmission part, the cut chain is tensioned on the chain plate, and the cut chain is meshed with the two sprockets for transmission. The chain saw cuts the graded gravel under the support layer of the ballastless track. The power part, the transmission part and the traction part are respectively arranged on both sides of the support layer. The cutting part is arranged laterally along the support layer, and the chain saw is pulled by the traction part Proceed vertically. Since the thickness of the cut chain of the cutting part can be adjusted as required, the cutting of graded gravel in the arch area on the roadbed can be completed at one time, thus improving the construction efficiency.

Description

a chain saw

technical field

The application belongs to the field of rail engineering, and in particular relates to a chain saw used for the regulation of the upper arch of a ballastless track roadbed.

Background technique

In the ballastless track structure of high-speed railways, the phenomenon of subgrade overarching disease is easy to occur, and the existing overarching disease rectification methods can also be realized for the case where the amount of overarching is small, such as adjusting the track fasteners. In some cases, it is generally necessary to dismantle the original track and refill the roadbed, or use a wire saw to cut multiple times, which cannot be completed at one time, and the remediation efficiency is low, which requires a lot of manpower, material resources and financial resources.

SUMMARY OF THE INVENTION

In view of this, the embodiments of the present application are expected to provide a chain saw to solve the problems of low efficiency and high cost of remediation of the upper arch of the subgrade of the ballastless track.

In order to achieve the above purpose, the technical solutions of the embodiments of the present application are implemented as follows:

An embodiment of the present application provides a chain saw, which includes a power part, a transmission part, a traction part and a cutting part, and two ends of the cutting part are respectively provided with a power part, a transmission part and a traction part , the power part at each end is drivingly connected to the transmission part and the traction part at the corresponding end, and the two transmission parts are respectively drivingly connected to the cutting part;

The cutting part includes a mounting seat, a chain plate, a sprocket and a chain cutting part. The two mounting seats are respectively connected to one of the transmission parts; The transmission part is drivingly connected, the cut chain is tensioned on the chain plate, and the cut chain meshes with the two sprockets for transmission.

Further, an adjustment hole is formed on the cutting part, and at least two positioning holes are formed on the transmission part. The installation angle of the transmission part.

Further, the chain plate includes:

outer chain plate;

an inner link plate, one end of the two inner link plates is respectively connected with the corresponding mounting seat; and

An adjustment piece, the other ends of the two inner link plates are respectively connected to both ends of the outer link plate through an adjustment piece, and the adjustment piece is used to adjust the installation of the inner link plate and the outer link plate position to adjust the tension of the strands.

Further, an accommodating hole is formed on the inner link plate, and a stop portion is formed on the side wall of the accommodating hole, and the stop portion divides the accommodating hole into a first accommodating portion and a second accommodating portion that communicate with each other. department;

Two ends of the outer link plate are respectively formed with an open-ended accommodating cavity and a limit hole communicating with the accommodating cavity, and one end of the inner link plate away from the mounting seat is accommodated in the accommodating cavity;

The adjustment member includes an adjustment rod and a limit pin with a threaded hole, the adjustment rod includes a rod head and a screw rod connected with the rod head, a step is formed between the rod head and the screw rod, and the adjustment rod is arranged in the accommodating hole, wherein the rod head is located in the first accommodating part, the screw rod is located in the second accommodating part, and the stop part restricts the movement of the rod head to the second accommodating part , the limit pin is penetrated in the limit hole, and the screw rod is connected with the threaded hole.

Further, an adjustment opening communicating with the first accommodating portion is formed on the outer link plate, a plurality of adjustment holes are formed on the rod head, and the plurality of adjustment holes are spaced along the circumference of the rod head distributed.

Further, the outer link plate includes two vertical plates arranged opposite to each other and two horizontal plates connected between the two vertical plates, two guide grooves and two guide grooves are formed between the two horizontal plates and the two vertical plates The cavity between the guide grooves, and the cut chain is at least partially accommodated in the guide grooves.

Further, the outer link plate further includes reinforcing ribs, a plurality of the reinforcing ribs are arranged in the cavity at intervals, and the reinforcing ribs are connected with the vertical plate and/or the horizontal plate.

Further, one end of the mounting seat is formed with a first mounting hole, the mounting seat is connected with the transmission part through the first mounting hole, and the other end of the mounting seat is formed with two limit plates, and The convex shaft and the second installation hole between the limit plates;

A third mounting hole corresponding to the second mounting hole and a shaft hole corresponding to the protruding shaft are formed on one end of the inner link plate close to the mounting seat;

The inner link plate is installed between the two limiting plates, the protruding shaft is inserted into the shaft hole, and the second installation hole is fastened to the third installation hole.

Further, one end of the mounting seat away from the first mounting hole is bent to a side away from the protruding shaft to form a clamping portion, the adjustment hole is formed on the clamping portion, and the clamping portion is clipped on the transmission part.

Further, the sprocket is located outside the mounting seat, and the cutting portion further includes a bearing arranged in the first mounting hole, a spacer arranged between the sprocket and the bearing, and a The shaft end plate on the outside of the sprocket, the transmission shaft of the transmission part is penetrated in the bearing, the first installation hole, the spacer, and the sprocket, and the shaft end plate is opposite to the shaft end plate. The sprocket is limited.

The chain saw provided by the embodiment of the present application is used for the construction of the upper arch of the ballastless track roadbed, and cuts the graded gravel under the support layer of the ballastless track. Two power parts, two transmission parts and two traction parts are respectively provided On both sides of the support layer, the cutting parts are arranged along the transverse direction of the support layer, the two power parts drive the two transmission parts respectively, and then the two transmission parts drive the cutting part to cut the graded gravel under the support layer laterally, and the traction part drives the cutting part to cut horizontally. The traction chainsaw runs longitudinally along the ballastless track. Since the thickness of the cut chain of the cutting part can be adjusted according to the needs, the cutting of graded gravel in the arch area on the roadbed can be completed at one time, thus shortening the construction time and improving the construction efficiency.

Description of drawings

1 is a schematic structural diagram of a chainsaw according to an embodiment of the application;

2 is a partial schematic view of a chain saw according to an embodiment of the application, showing the installation structure of the chain plate and the transmission part;

Fig. 3 is the rear partial enlarged schematic diagram of A place in Fig. 1;

Fig. 4 is the sectional schematic diagram of the direction B-B of Fig. 3;

5 is a schematic structural diagram of an inner chain plate of a chainsaw according to an embodiment of the application;

6 is a schematic structural diagram of an adjusting member of a chainsaw according to an embodiment of the application;

7 is a schematic structural diagram of an outer link plate of a chainsaw according to an embodiment of the application;

Fig. 8 is the sectional schematic diagram of the D-D direction of Fig. 1;

9 is a schematic diagram from a perspective of a mounting seat in a chain saw according to an embodiment of the application;

FIG. 10 is a schematic diagram from another perspective of a mounting seat in a chainsaw according to an embodiment of the application; and

11 is a schematic structural diagram of a chain saw applied to the construction of the upper arch of the ballastless track roadbed according to an embodiment of the application.

Description of reference numbers:

1. Power part; 2. Transmission part; 20. Positioning hole; 21. Transmission shaft; 3. Traction part; 4. Cutting part; 40. Mounting seat; 400, First mounting hole; 401, Second mounting hole; 402 , convex shaft; 403, limit plate; 404, clamping part; 4041, adjustment hole; 41, chain plate; 410, outer chain plate; 4101, accommodating cavity; 4102, limit hole; 4103, adjustment opening; 4104, Vertical plate; 4105, horizontal plate; 4106, guide groove; 4107, cavity; 4108, reinforcing rib; 411, inner chain plate; 4111, receiving hole; 41111, stop part; 41112, first receiving part; 2. accommodating part; 4112, shaft hole; 4113, third mounting hole; 412, adjusting piece; 4121, adjusting rod; 41211, rod head; 412111, adjusting hole; 412112, step; 41212, screw rod; 4122, limit pin; 41221, threaded hole; 42, sprocket; 43, cut chain; 44, bearing; 45, spacer; 46, shaft end plate; 5, graded gravel; 6, ballastless track; 61, track plate; 62, Support layer; 63, end beam; 7, walking groove; 8, traction pile; 9, working groove.

Detailed ways

It should be noted that the embodiments in this application and the technical features in the embodiments can be combined with each other without conflict. Improper restrictions on this application.

In the description of this application, the "front" and "rear" orientations or positional relationships are based on the orientation shown in Figure 1, the "upper" and "bottom" orientations are based on the orientation shown in Figure 8, and the "horizontal" orientation is based on the orientation shown in Figure 8. In the orientation shown in Figure 11, "longitudinal" refers to the direction along 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a reference to the present application. limits.

A commonly used rectification method is to restore the smoothness of the ballastless track line by adjusting the fasteners for the upper arch disease of the ballastless track subgrade, but the adjustment ability of the fasteners to the upper arch deformation is small. , other methods must be used to restore the elevation of the ballastless track. In addition, the adjustment is heavy and labor-intensive, so the efficiency is low and the cost is high. The other is to manually dismantle the original ballastless track structure and then refill the subgrade. This method takes a long time to construct, has low efficiency and high treatment costs.

In view of this, the embodiment of the present application provides a chain saw, which is applied to the construction of the upper arch of the ballastless track roadbed. Please refer to FIG. The two ends of the cutting part 4 are respectively provided with a power part 1, a transmission part 2 and a traction part 3. The power part 1 at each end is driven to connect the transmission part 2 and the traction part 3 at the corresponding end, and the two transmission parts 2 are respectively driven with the cutting part 4. Connection; the cutting part 4 includes a mounting seat 40, a chain plate 41, a sprocket 42 and a chain cutting 43, the two mounting seats 40 are respectively connected with a transmission part 2, the two ends of the chain plate 41 are respectively connected with a mounting seat 40, the two chain The wheels 42 are respectively drivingly connected with a transmission part 2 , the chain cutting 43 is tensioned on the chain plate 41 , and the cutting chain 43 is engaged with the two sprockets 42 for transmission.

Referring to FIG. 11 , the two power parts 1 drive the two transmission parts 2 respectively, and then the two transmission parts 2 drive the sprockets 42 of the cutting part 4 . The rotation of the cutting chain 43 cuts the graded crushed stone 5 under the support layer 62 laterally, and the chain saw is pulled by the traction part 3 to move longitudinally along the ballastless track 6 . Since the two ends of the cutting part 4 are provided with the power part 1, the effective cutting length of the chain saw is increased, and it can be used for cutting objects with a large width. At the same time, the thickness of the cut chain 43 of the cutting part 4 can be adjusted according to the needs, which can complete the cutting of the graded gravel 5 in the arch area on the roadbed at one time, and solve the problem that the amount of arch on the roadbed of the ballastless track 6 is large and needs to be cut multiple times. Therefore, the construction time is shortened and the construction efficiency is improved.

Continuing to refer to Figure 11, before rectifying the disease of the upper arch of the subgrade of the ballastless track 6, the construction personnel installed a power part 1, a transmission part 2 and a traction part 3 as a whole, and moved it into the ballastless track in the remediation area of the upper arch section. 6 on one side of the running groove 7, the other power part 1, a transmission part 2 and a traction part 3 are installed as another whole, and are carried into the other side of the ballastless track 6 in the remediation area of the upper arch section. The cutting part 4 is placed at the working groove 9, and the two ends of the cutting part 4 are respectively connected with the power part 1, the transmission part 2 and the traction part 3 which are installed on both sides of the ballastless track 6 as a whole. The traction part 3 is connected with the traction pile 8, which is beneficial for the traction part 3 to pull the chain saw forward in a directional manner. Before rectifying the upper arch disease of the ballastless track 6, it is necessary to measure the upper arch amount, and exchange the corresponding thickness of the chain cut according to the size of the upper arch amount. 43, so that the cutting chain 43 can cut the graded crushed stone 5 at one time. When rectifying the upper arch disease of the ballastless track 6, the two power parts 1 drive the two transmission parts 2 respectively, and then the two transmission parts 2 drive the cutting part 4 to transversely cut the graded gravel 5 under the support layer 62, and the traction part 3. The traction chainsaw moves longitudinally along the ballastless track 6. The problem that the amount of arch on the 6 subgrade of the ballastless track is large and needs to be cut many times is solved, so the cutting time is shortened and the cutting efficiency is improved. The rotation of the cutting chain 43 is indirectly driven by the two power units 1 at the same time, and the power is sufficient, which ensures sufficient cutting force and ensures the stability of the cutting graded crushed stone 5 .

It should be noted that, in the related art, the support layer 62 of the ballastless track 6 in the upper arch section is renovated by using a wire saw. The support layer 62 is a concrete structure with high hardness, so it is extremely difficult to construct, and the construction efficiency is low and the construction time is low. long. The chain saw of the present application cuts the graded gravel 5 in the subgrade of the ballastless track 6, the graded gravel 5 has low hardness and is easy to cut, and the graded gravel 5 does not belong to the ballastless track 6, so it is not easy to affect Structural strength and stability of ballastless track 6 . In each embodiment of the present application, the cutting objects of the chain saw are graded gravel 5, which will not be repeated below.

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

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 to the design of the cutting chain 43 . It can be understood that the sprocket 43 may also include 4 or 6 other meshing teeth. Specifically, the sprocket 42 may be installed below the transmission part 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 under the two transmission parts 2 , which is beneficial for the cutting chain 43 to cut the graded gravel 5 close to the bottom of the support layer 62 . , there is no need to cut the graded gravel 5 in a deeper depth, so the excavation depth of the working groove 9 can be reduced, the construction time and the construction cost can be shortened.

In one embodiment, the cutting chain 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. Multiple picks are detachably connected for easy maintenance and replacement of damaged picks or blades.

In one embodiment, please refer to FIG. 2 , an adjustment hole 4041 is formed on the mounting seat 40 , and at least two positioning holes 20 are formed on the transmission part 2 . The installation angle of the part 4 relative to the transmission part 2 . By adjusting the installation 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, so that the change of the cutting direction of the cutting part 4 can be finally realized. Meet the cutting requirements of different projects.

It can be understood that the number of positioning holes 20 is not limited, and the number distributed in a circle on the transmission part 2 can be any number, depending on the project. If the angle between the cutting part 4 and the transmission part 2 needs to be changed very finely, then Several more positioning holes 20 may be arranged along the circumference on the flange edge of the transmission part 2, otherwise, fewer positioning holes 20 may be arranged.

Specifically, in an embodiment, please refer to FIG. 2 , in the chain saw of the present application, four positioning holes 20 may be distributed in a circle every 90° on the transmission part 2 , and one of the positioning holes 20 is fastened with the adjustment hole 4041 After connection, the two positioning holes 20 and the adjustment holes 4041 are fastened to 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 are at 90°, the chain saw longitudinally cuts the graded gravel 5 along the ballastless track 6; The graded crushed stone 5 is reversely cut in the longitudinal direction. 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.

In one embodiment, please refer to FIG. 3 , the link plate 41 includes an outer link plate 410 , an inner link plate 411 and an adjusting member 412 , one end of the two inner link plates 411 is respectively connected to the corresponding mounting seat 40 , and the two inner link plates 411 The other end of the chain is connected to both ends of the outer chain plate 410 through an adjusting member 412 respectively, and the adjusting members 412 are used to adjust the installation positions of the inner chain plate 411 and the outer chain plate 410 to adjust the tension of the cut chain 43 . The installation positions of the inner link plate 411 and the outer link plate 410 are adjusted by the adjusting member 412 , so as to change the length of the link plate 41 to adjust the tension of the cut chain 43 , so as to ensure that the cut chain 43 is cut with graded gravel. 5 has enough strength to achieve uniform and stable cutting.

In one embodiment, please refer to FIG. 4 , FIG. 5 , FIG. 6 and FIG. 7 , an accommodating hole 4111 is formed on the inner link plate 411 , and a stopper 41111 is formed on the side wall of the accommodating hole 4111 . The accommodating hole 4111 is divided into a first accommodating part 41112 and a second accommodating part 41113 which are communicated. Two ends of the outer link plate 410 are respectively formed with an open-ended accommodating cavity 4101 and a limiting hole 4102 communicating with the accommodating cavity 4101 . One end of the inner link plate 411 away from the mounting seat 40 is accommodated in the accommodating cavity 4101 . The adjustment member 412 includes an adjustment rod 4121 and a limit pin 4122 with a threaded hole 41221. The adjustment rod 4121 includes 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, and the adjustment rod 4121 It is arranged in the accommodating hole 4111, wherein the rod head 41211 is located in the first accommodating part 41112, the screw rod 41212 is located in the second accommodating part 41113, the stop part 41111 restricts the movement of the rod head 41211 to the second accommodating part 41113, and the limit pin 4122 penetrates Set in the limiting hole 4102, the screw 41212 is connected with the threaded hole 41221.

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 limiting holes 4102 are formed at both ends of the outer link plate 410, and the screw 41212 is located in the second accommodating part 41113, the second accommodating part 41113 belongs to the accommodating hole 4111, and the accommodating hole 4111 belongs to the inner link plate 411, so the adjusting screw 41212 is screwed The length of the threaded hole 41221 is equal to adjusting the installation distance between the inner link plate 411 and the outer link plate 410, and then adjusts the tension of the cut chain 43, and the sufficient tension can enable the cut chain 43 to cut graded gravel 5. Sufficient force to achieve uniform and stable cutting effect. In addition, the stopper portion 41111 abuts against the step 412112 formed between the rod head 41211 and the screw rod 41212, thereby restricting the rod head 41211 from moving to the second accommodating portion 41113, thus preventing the adjusting rod 4121 from the accommodating hole 4111 of the inner link plate 411 Sliding arbitrarily inside, preventing the installation distance between the inner link plate 411 and the outer link plate 410 from changing arbitrarily, finally ensuring the uniform tension between the inner link plate 411 and the outer link plate 410, and ensuring the stability of the cutting section 4 cutting graded gravel 5 .

In one embodiment, please refer to FIG. 4 , FIG. 5 , FIG. 6 and FIG. 7 , the outer link plate 410 is formed with an adjustment opening 4103 communicating with the first accommodating portion 41112 , and the rod head 41211 is formed with a plurality of adjustment holes 412111 , a plurality of adjustment holes 412111 are distributed at intervals along the circumference of the rod head 41211 . The outer link plate 410 is formed with an adjustment opening 4103 that communicates with the first accommodating portion 41112, so that the construction personnel can have an operation space. This operation space is used for the construction personnel to take an adjustment tool and put it into the adjustment hole 412111, and adjust the adjustment tool by twisting the adjustment tool. The rod 4121 is used to adjust the length of the screw 41212 screwed into the limit pin 4122 . The multiple adjustment holes 412111 are distributed at intervals along the circumference of the rod head 41211, which is beneficial to provide the adjustment tool with multiple orientation adjustment screws 41212, so as to avoid that when there is only one adjustment hole 412111, one adjustment hole 412111 is blocked by the outer link plate 410 and cannot be placed in the adjustment. tool.

In one embodiment, please refer 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 , and the two horizontal plates 4105 and the two vertical plates 4104 are formed between the two vertical plates 4104 . The two guide grooves 4106 and the cavity 4107 located between the two guide grooves 4106 , and the segmented chain 43 is at least partially accommodated in the guide grooves 4106 . The formation of two guide grooves 4106 between the two horizontal plates 4105 and the two vertical plates 4104 not only facilitates the directional rotation of the cut chain 43 along the direction of the guide groove 4106 , but also ensures that the cut chain 43 is installed in the guide groove 4106 through the cut chain 43 . Even tension. Wherein, at least a part of the cut chain 43 is accommodated in the guide groove 4106 , and the other part is tensioned on the sprocket 42 .

In one embodiment, please refer to FIGS. 3 and 8 , since the width of the chain saw to cut the graded crushed stone 5 is larger, the cut chain 43 in the contact portion with the graded crushed stone 5 is also longer, and the longer working cut chain 43 needs sufficient cutting force, and the cut chain 43 is installed in the guide groove 4106 of the outer chain plate 410. The outer chain plate 410 mainly bears the bearing capacity of the cut chain 43. In order to better play a bearing role, the outer chain plate 410 is strengthened. The outer link plate 410 further includes reinforcing ribs 4108, a plurality of reinforcing ribs 4108 are arranged in the cavity 4107 at intervals, and the reinforcing ribs 4108 are connected with the vertical plate 4104 and/or the horizontal plate.

In one embodiment, please refer to FIG. 4 , FIG. 5 and FIG. 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 , and the other end of the mounting seat 40 is Two limit plates 403, a protruding shaft 402 and a second installation hole 401 are formed between the two limit plates 403; a third installation corresponding to the second installation hole 401 is formed at one end of the inner link plate 411 close to the mounting seat 40 The hole 4113 and the shaft hole 4112 corresponding to the protruding shaft 402; the inner link plate 411 is installed between the two limit plates 403, the protruding shaft 402 is inserted into the shaft hole 4112, and the second mounting hole 401 and the third mounting hole 4113 are tightly connected .

In one embodiment, please refer to FIG. 2 and FIG. 9 , one end of the mounting seat 40 away from the first mounting hole 400 is bent to the side away from the protruding shaft 402 to form a snap portion 404 , and the adjustment hole 4041 is formed in the snap portion 404 , the clamping part 404 is clamped on the transmission part 2 . Since there is a protruding shaft 402 and a second mounting hole 401 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 and the transmission part 2 are fastened, the bending is formed. The clamping part 404 and the adjustment hole 4041 are formed on the clamping part 404 to play the role of dislocation fastening. In addition, bending to form the clamping portion 404 is beneficial for the flange plate of the transmission portion 2 to be clamped in the clamping portion 404, which plays a role of positioning, and is convenient for installation and operation. The engaging portion 404 may be integrally formed with the main body of the mounting seat 40 , or may be mounted on the main body of the mounting seat 40 by a fastener.

In one embodiment, please refer to FIG. 4 , the sprocket 42 is located outside the mounting seat 40 , and the cutting portion 4 further includes a bearing 44 arranged in the first mounting hole 400 and a spacer arranged between the sprocket 42 and the bearing 44 . 45, and the shaft end plate 46 arranged on the outside of the sprocket 42, the transmission shaft 21 of the transmission part 2 is penetrated in the bearing 44, the first installation hole 400, the spacer 45, and the sprocket 42, and the shaft end plate 46 is opposite to the sprocket. 42 to limit.

Through the bearing 44 in the first installation hole 400, the bearing 44 is installed in the first installation hole 400 of the installation seat 40, and the center line of the bearing 44 can be used as the rotation axis, and the center line to the adjustment hole 4041 can be used as the radius. Rotate around the rotating shaft to change the fastening position of the adjustment hole 4041 and the positioning hole 20 , so as to realize the angle between the cutting part 4 and the transmission part 2 . The sprocket 42 is fixed on the transmission shaft 21 of the transmission part 2 , and rotates with the rotation of the transmission shaft 21 , thereby driving the chain cutting 43 on the sprocket 42 to rotate. The spacer 45 is arranged between the sprocket 42 and the bearing 44 to isolate the bearing 44 and the sprocket 42 to prevent the adjustment hole 4041 on the mounting seat 40 from being switched with the positioning hole 20 on the transmission part 2. As a result, the mounting seat 40 and the sprocket 42 are damaged due to contact friction. In addition, the spacer 45 is arranged between the sprocket 42 and the bearing 44 to prevent the mounting seat 40 from interfering with the chain intercept on the sprocket 42 when the mounting seat 40 rotates. The shaft end plate 46 makes the sprocket 42 clamp on the transmission shaft 21 to prevent the sprocket 42 from moving axially along the transmission shaft 21 , resulting in the instability of the cutting chain 43 cutting the graded gravel 5 .

It should be noted that the limiting method of the sprocket 42 is not limited, and the shaft end plate 46 can be the end plate shown in the drawing of the application, and is connected to the transmission shaft 21 by passing through the end plate with screws; the shaft end plate 46 can also be The snap ring can also limit the position of the sprocket 42 to prevent the sprocket 42 from moving axially along the transmission shaft 21 .

The various embodiments/implementations provided in this application may be combined with each other under the condition that no contradiction arises.

The above are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. 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 (10)

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).

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