CN217419775U - Tunnel excavator working device and excavator - Google Patents

Abstract

The utility model discloses tunnel excavator equipment and excavator relates to engineering machine tool, a tunnel excavator equipment is provided, including L shape swing arm, the bucket rod hydro-cylinder, the swing arm hydro-cylinder, the triangle dipper, go up frame and operation accessory, the rear end of L shape swing arm is articulated with last frame front end, L shape swing arm front end is articulated with the triangle dipper, swing arm hydro-cylinder rear end is articulated with last frame front end, swing arm hydro-cylinder front end is articulated with the swing arm hydro-cylinder pin joint of L shape swing arm, swing arm hydro-cylinder pin joint is located the position that L shape swing arm is close to the front end, bucket rod hydro-cylinder rear end is articulated with the first dipper hydro-cylinder pin joint of L shape swing arm, bucket rod hydro-cylinder front end is articulated with the second dipper hydro-cylinder pin joint of triangle dipper rear end, the triangle dipper front end is provided with the operation accessory pin joint of installation operation accessory. The utility model also provides an excavator. The utility model discloses tunnel excavator equipment can bear bigger work load, and the digging force promotes by a wide margin, and organism gyration operation receives the space to influence lessly, high efficiency operation in the tunnel, and the complete machine trafficability characteristic is good.

Description

Tunnel excavator working device and excavator

Technical Field

The utility model relates to an engineering machine tool specifically relates to a tunnel excavator equipment. Additionally, the utility model discloses still relate to an excavator.

Background

Because of the space limitation in tunnel construction, the construction equipment needs to have the following characteristics: 1. the construction can not accommodate a plurality of devices at the same time, so that higher operation efficiency is required; 2. the structural size and the operation range of the equipment must meet the space requirement of an operation field; 3. the load of the stone working condition operation is large, the load change of the no-load state and the full-load state is also large, and the strength of the equipment needs to meet the use requirement.

At present, the transferring, loading and unloading work for the stone in the tunnel is mainly carried out by various loaders, but the efficiency is low, and the excavator is not quick in operation and flexible in action. The excavator with medium and small tonnages has smaller body and movable arm bucket rod, can realize basic operation actions such as excavation, rotation and the like during tunnel operation, but is limited by the tonnages and bucket capacity, has extremely low operation efficiency, cannot meet the operation working conditions of a stone square and a hard soil layer, is easy to have structural member fracture faults, has higher use cost, and is difficult to be suitable for the tunnel working condition operation.

During tunnel operation, the excavator with medium and large tonnage has the structural strength meeting the operation working conditions of a stone and a hard soil layer, the bucket volume can also meet the efficiency requirement, but the excavator is limited by the space of the tunnel, the sizes of the excavator body and the working device are influenced, the rotation operation action cannot be realized during operation, the excavator can only simply reciprocate back and forth, and the operation efficiency is low, so that the excavator with medium and large tonnage cannot meet the operation working conditions of the tunnel.

Therefore, the utility model provides a novel tunnel excavator work device in order to solve or alleviate above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a tunnel excavator work device is provided, this tunnel excavator work device can bear bigger work load, and the digging force promotes by a wide margin, and organism gyration operation receives the space to influence lessly, high efficiency operation in the tunnel, and the complete machine trafficability characteristic is good.

The utility model also provides an excavator, this excavator can work at the high efficiency in the tunnel, and the digging force is strong, and the complete machine trafficability characteristic is good.

In order to solve the technical problem, the utility model provides a tunnel excavator equipment, including L shape swing arm, arm hydro-cylinder, swing arm hydro-cylinder, arm, go up frame and operation accessory, the rear end of L shape swing arm be provided with go up frame front end articulated last frame pin joint, the arm pin joint of L shape swing arm front end with the arm is articulated, swing arm hydro-cylinder rear end with it is articulated to go up the frame front end, swing arm hydro-cylinder front end with the swing arm hydro-cylinder pin joint of L shape swing arm is articulated, swing arm hydro-cylinder pin joint is located the position that L shape swing arm is close to the front end, arm hydro-cylinder rear end with the first arm hydro-cylinder pin joint of L shape swing arm is articulated, arm hydro-cylinder front end with the arm rear end is articulated, the arm front end installation the operation accessory.

Specifically, the L-shaped movable arm is of an L-shaped box-shaped structure, and the hinged point of the arm cylinder is located on the lower side of the L-shaped movable arm.

Preferably, the cross-sectional area of the bent portion of the L-shaped boom is larger than the cross-sectional area of other portions of the L-shaped boom, the cross-sectional area of the L-shaped boom gradually decreases from the bent portion to the front end, and the cross-sectional area of the L-shaped boom gradually decreases from the bent portion to the rear end.

Specifically, the arm is a triangle arm, be provided with on the triangle arm with arm pin joint articulated movable arm pin joint, with arm cylinder front end articulated second arm cylinder pin joint and be used for the installation the operation accessory pin joint of operation accessory, the movable arm pin joint the operation accessory pin joint with second arm cylinder pin joint is located respectively the triangle summit of triangle arm, the movable arm pin joint is located the upside of triangle arm, second arm cylinder pin joint is located the downside of triangle arm.

Preferably, the triangular bucket rod is of an acute-angle triangular structure.

The bucket comprises a bucket oil cylinder, a rocker and a connecting rod, wherein the operation accessory is a bucket, one end of the bucket is hinged to a hinge point of the operation accessory, the other end of the bucket is hinged to one end of the connecting rod, one end of the rocker is hinged to the hinge point of the rocker of the triangular bucket rod, the other end of the rocker is hinged to the other end of the connecting rod, the front end of the bucket oil rod is hinged to the hinge point between the rocker and the connecting rod, and the rear end of the bucket oil cylinder is hinged to the hinge point of the bucket oil cylinder of the triangular bucket rod.

Preferably, the scraper bowl is the high-strength steel plate welding formed part, the bucket tooth and the side edge backplate of scraper bowl are wear-resisting steel casting formed part, the scraper bowl side is equipped with wear-resisting reinforcing plate structure.

Preferably, the rear end of the upper frame is provided with a luffing counterweight mechanism.

Specifically, the variable-amplitude counterweight mechanism comprises a variable-amplitude counterweight and a variable-amplitude oil cylinder, a counterweight hinge joint hinged with the upper frame is arranged on the variable-amplitude counterweight, one end of the variable-amplitude oil cylinder is hinged with the upper frame, the other end of the variable-amplitude oil cylinder is hinged with the counterweight oil cylinder hinge joint of the variable-amplitude counterweight so as to drive the variable-amplitude counterweight to rotate around the counterweight hinge joint, the two counterweight hinge joints are symmetrically arranged on two sides of the variable-amplitude counterweight, and the two counterweight oil cylinder hinge joints are symmetrically arranged on two sides of the variable-amplitude counterweight.

Further, the utility model provides an excavator, a serial communication port, including work device and chassis, work device is any one of above-mentioned technical scheme tunnel excavator work device.

By the proposal, the utility model has the advantages that:

the utility model discloses tunnel excavator equipment adopts L shape swing arm, and L shape swing arm has reduced the operation height of complete machine effectively, and arranges swing arm hydro-cylinder pin joint near the front end of L shape swing arm, can promote swing arm lifting force by a wide margin, optimizes complete machine spatial structure for equipment bears the enhancement of operation load capacity, and the tunnel space restriction that receives is littleer, can be in the tunnel high efficiency operation.

Additionally, the utility model discloses tunnel excavator equipment can also set up the variable amplitude counterweight mechanism in last frame rear end, adjusts the counter weight position when the change of operation load or operating mode, makes the complete machine center remain unchanged for the complete machine is in stable condition, and the complete machine rocks by a wide margin when reducing full load operation, improves the operating efficiency, promotes to control the travelling comfort.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of a specific embodiment of the working device of the tunnel excavator of the present invention;

fig. 2 is a schematic structural view of the L-shaped boom 1;

FIG. 3 is a schematic view of the triangular arm 4;

fig. 4 is a schematic structural view of bucket 8;

fig. 5 is a schematic structural view of the luffing counterweight 11.

Description of the reference numerals

1L shape movable arm 101 upper carriage hinge point

102 first bucket rod oil cylinder hinge point 103 movable arm oil cylinder hinge point

104 bucket rod hinge point 2 bucket rod oil cylinder

3 movable arm oil cylinder 4 triangle bucket rod

401 bucket cylinder hinge point 402 swing arm hinge point

403 rocker hinge point 404 operation accessory hinge point

405 second arm cylinder pin joint 5 bucket cylinder

6 rocker and 7 connecting rod

8 bucket 801 bucket tooth

802 wear-resistant steel casting 9 chassis

10 upper frame 11 variable-amplitude counterweight

1101 counterweight hinge point 1102 counterweight oil cylinder hinge point

12 amplitude-variable oil cylinder

Detailed Description

The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, and it should be understood that the embodiments described herein are only for the purpose of illustration and explanation, and the scope of the present invention is not limited to the following embodiments.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "forming," "mounting," "setting," "hinging," "connecting," and the like are to be construed broadly, e.g., the connection may be a direct connection, an indirect connection via an intermediate medium, a fixed connection, a detachable connection, or an integral connection; either directly or indirectly through intervening connectors, either internally or in cooperative relationship to each other. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless otherwise specified, the terms "front", "back", "upper", "lower", and the like, which are used to indicate the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are used only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; for the orientation terms of the present invention, it should be understood in conjunction with the actual installation state. In the following description, the "front end" is an end close to the working end, and the "rear end" is an end far from the working end.

The utility model provides a working device of a tunnel excavator, refer to fig. 1, fig. 1 is a specific embodiment of the working device of the tunnel excavator of the utility model, mainly comprising an L-shaped movable arm 1, a bucket rod oil cylinder 2, a movable arm oil cylinder 3, a bucket rod, an upper carriage 10 and a working accessory, the L-shaped movable arm 1 can effectively reduce the working height of the whole machine, the rear end of the L-shaped movable arm 1 is provided with an upper carriage hinge joint 101 hinged with the front end of the upper carriage 10, a bucket rod hinge joint 104 at the front end of the L-shaped movable arm 1 is hinged with the bucket rod, the rear end of the movable arm oil cylinder 3 is hinged with the front end of the upper carriage 10, the front end of the movable arm oil cylinder 3 is hinged with a movable arm hinge joint 103 of the L-shaped movable arm 1, the movable arm hinge joint 103 is positioned at the position close to the front end of the L-shaped movable arm 1, the movable arm lifting force can be greatly improved, the space structure of the whole machine is optimized, and the working under the tunnel environment can be more favorably carried out, the rear end of the arm cylinder 2 is hinged with a first arm cylinder hinge point 102 of the L-shaped movable arm 1, the front end of the arm cylinder 2 is hinged with the rear end of the arm to realize the operation action of the arm, and an operation accessory is further mounted at the front end of the arm to perform operation in a tunnel. Adopt L shape swing arm 1 and with swing arm hydro-cylinder pin joint 103 leading, make the utility model discloses tunnel excavator equipment bears the reinforcing of operation loading capacity, and the tunnel space restriction that receives is littleer, can be in the tunnel high efficiency operation.

It should be noted that most tunnel constructions are stone-side operations, and the tunnel excavator has a large operation load and a high requirement on the reliability of structural members, so that, as a preferred embodiment, the hinge joint of the L-shaped boom 1, the upper frame 10 and the triangular bucket rod 4 is of a forged structure, the hinge joint of the L-shaped boom 1, the bucket rod cylinder 2 and the boom cylinder 3 is of a high-strength steel structure, the hinge joint of the triangular bucket rod 4 and the operation accessory is of a forged structure, and the other hinge joint points on the triangular bucket rod 4 are of high-strength steel structures.

As the utility model discloses tunnel excavator equipment's embodiment, see fig. 2, L shape swing arm 1 is the box structure that is "L" shape, arm hydro-cylinder pin joint 102 is located L shape swing arm 1's downside, make arm hydro-cylinder 2 install the below at L shape swing arm 1, the swing arm has been increased and has been born the operation load intensity, in the narrow and small tunnel in space, reduce the operation height of complete machine effectively, and do not shelter from to operating personnel's the field of vision, in operation process, L shape swing arm 1 also can play certain guard action to arm hydro-cylinder 2 and cylinder pipeline, avoid lifting in-process tunnel top and arm hydro-cylinder 2 collision at L shape swing arm 1, perhaps the tunnel top drops down the stone and pound on arm hydro-cylinder 2, cause arm hydro-cylinder 2 to damage. It should be noted that, since the arm cylinder 2 is installed below the L-shaped boom 1, in order to avoid collision interference between the boom cylinder 3 and the arm cylinder 2, as a preferred embodiment, the hinge points 103 of the two boom cylinders are symmetrically arranged on two sides of the L-shaped boom 1, the rear ends of the two boom cylinders 3 are respectively hinged on two sides of the upper frame 10, and the front ends of the two boom cylinders are respectively hinged on the hinge points 103 of the boom cylinders on two sides of the L-shaped boom 1, so that the arm cylinder 2 is located between the two boom cylinders 3, and the arm cylinder 2 and the boom cylinder 3 do not affect each other in the moving process.

Furthermore, the sectional area of the bent part of the L-shaped movable arm 1 is larger than the sectional areas of other parts of the L-shaped movable arm 1, the sectional area of the L-shaped movable arm 1 is gradually reduced from the bent part to the front end, and the sectional area of the L-shaped movable arm 1 is gradually reduced from the bent part to the rear end, so that the bending resistance and torsion resistance of the bent part of the L-shaped movable arm 1 are improved, and the requirement on structural strength is met.

Referring to fig. 1 and 3, the boom is a triangular boom 4, the triangular boom 4 has a triangular structure, the size of the boom is reduced, the working space of the boom and the load bearing strength of the boom are effectively increased, the triangular boom 4 is provided with a boom hinge point 402 hinged to the boom hinge point 104, a second boom cylinder hinge point 405 hinged to the front end of the boom cylinder 2, and a working accessory hinge point 404 for installing a working accessory, the boom hinge point 402, the working accessory hinge point 404, and the second boom cylinder hinge point 405 are respectively located at the triangular vertex of the triangular boom 4, the boom hinge point 402 is located at the upper side of the triangular boom 4, the second boom cylinder hinge point 405 is located at the lower side of the triangular boom 4, so that the triangular boom 4 is in an inverted triangular arrangement, triangle dipper 4 has great operating space, and the intensity that triangle-shaped structure bore load is stronger, and dipper hydro-cylinder 2 articulates at second dipper hydro-cylinder pin joint 405 simultaneously and can effectively reduce the installation space size. It should be noted that the boom hinge point 402 is connected to the work attachment hinge point 404 to form the upper side of the arm 4, the second arm cylinder hinge point 405 is connected to the work attachment hinge point 404 to form the lower side of the arm 4, and the inverted triangle arrangement represents: when the upper side of the triangular arm 4 is horizontal, that is, in the state shown in fig. 3, the hinge point 405 of the second arm cylinder is the lowest vertex of the entire triangular structure.

Further, triangle dipper 4 is acute angle triangle-shaped structure, and triangle dipper 4 is bigger around its rotation range with the pin joint of L shape swing arm 1 under the drive of dipper hydro-cylinder 2 to have bigger operating space, convenient construction improves the operating efficiency.

As the utility model discloses tunnel excavator equipment's embodiment, see fig. 1 and fig. 3, the utility model discloses tunnel excavator equipment still includes scraper bowl hydro-cylinder 5, rocker 6 and connecting rod 7, the operation accessory is scraper bowl 8, 8 one ends of scraper bowl are articulated with operation accessory pin joint 404, the other end of scraper bowl 8 is articulated with the one end of connecting rod 7, 6 one ends of rocker are articulated with the rocker pin joint 403 of triangle dipper 4, the 6 other ends of rocker are articulated with the other end of connecting rod 7, and the front end of scraper bowl hydro-cylinder 5 is articulated on the pin joint between the two of rocker 6 and connecting rod 7, the rear end of scraper bowl hydro-cylinder 5 is articulated on the scraper bowl hydro-cylinder pin joint 401 of triangle dipper 4, realize the operation action with withdrawal drive scraper bowl 8 through the extension of scraper bowl dipper 5. In addition, since a work mode other than the excavation work may be performed in the tunnel and the work may be performed by attaching the triangular arm 4 by replacing a different work tool, the work tool may be various, and may be a hydraulic shear, a breaking hammer, a drilling tool, or the like, in addition to the bucket.

As the utility model discloses tunnel excavator equipment's preferred embodiment, scraper bowl 8 is the high strength steel sheet open-faced welding formed part, can bear great load, and structural strength is high, because scraper bowl 8 needs frequent the action of excavating in the work progress, in order to avoid scraper bowl 8 wearing and tearing, see fig. 4, scraper bowl 8's bucket tooth 801 and side edge backplate 802 cast the type spare for wear-resisting steel, still are equipped with wear-resisting reinforcing plate structure in scraper bowl 8's side, further improve scraper bowl 8's ability to resist wear.

Because tunnel excavator operation load is great, the no-load in the operation process is great with load change when fully loaded, and complete machine stability requirement to the operation in-process is higher, as the utility model discloses tunnel excavator equipment's preferred embodiment is provided with change width of cloth counter weight mechanism at last frame 10 rear end to can be according to the change of operation load and operating mode in good time adjustment complete machine focus. The above-mentioned "no load" refers to a state when the tunnel excavator is not loaded with a load weight, and the "full load" refers to a state when the tunnel excavator reaches a maximum load weight.

As a specific embodiment of the variable-amplitude counterweight mechanism, referring to fig. 1 and 5, the variable-amplitude counterweight mechanism includes a variable-amplitude counterweight 11 and a variable-amplitude oil cylinder 12, the variable-amplitude counterweight 11 is provided with a counterweight hinge point 1101 hinged to the upper frame 10, one end of the variable-amplitude oil cylinder 12 is hinged to the upper frame 10, the other end of the variable-amplitude oil cylinder 12 is hinged to a counterweight oil cylinder hinge point 1102 of the variable-amplitude counterweight 11, so as to drive the variable-amplitude counterweight 11 to rotate around the counterweight hinge point 1101, thereby realizing adjustment of the center of gravity of the whole machine, the variable-amplitude oil cylinder 12 contracts so that the variable-amplitude counterweight 11 rotates close to the upper frame 10, and the center of gravity of the variable-amplitude counterweight 11 moves towards the front end, so that the center of gravity of the whole machine is biased towards the front end; the luffing cylinder 12 extends out to enable the luffing counterweight 11 to rotate away from the upper frame 10, and the gravity center of the luffing counterweight 11 moves towards the rear end, so that the gravity center of the whole machine is deviated towards the rear end. In order to ensure that the luffing counterweight 11 can stably rotate in the process of contracting and extending the luffing cylinder 12 and the adjustment of the gravity center of the whole machine is realized, two counterweight hinge points 1101 are symmetrically arranged at two sides of the luffing counterweight 11, and two counterweight cylinder hinge points 1102 are symmetrically arranged at two sides of the luffing counterweight 11, so that the luffing counterweight has a good supporting effect in the rotating process of the luffing counterweight 11. It should be noted that the control of the luffing cylinder 12 can be associated with the operations of the boom cylinder 3, the arm cylinder 2, and the bucket cylinder 5, and synchronous control is realized, and the luffing cylinder 12 can also be independently controlled.

Additionally, the utility model provides an excavator still provides, see fig. 1, and this excavator includes equipment and chassis 9, and equipment does the utility model provides a tunnel excavator equipment, this excavator can work at the high efficiency in the tunnel, and the digging force is strong, and the complete machine trafficability characteristic is good.

The working device of the tunnel excavator of the utility model optimizes the height space size of the whole machine through the L-shaped movable arm 1, has good trafficability in the tunnel space, arranges the movable arm oil cylinder hinge point 103 at a position close to the front end of the L-shaped movable arm 1, can greatly lift the lifting force of the L-shaped movable arm 1, the triangular bucket rod 4 increases the working space of the bucket rod, has better structural strength and can bear larger load, the bucket rod oil cylinder 2 is arranged at the lower side of the L-shaped movable arm 1, the working height size is reduced, the working load bearing strength of the L-shaped movable arm 1 is increased, the L-shaped movable arm 1 has certain protection effect on the bucket rod oil cylinder 2 and the oil cylinder pipeline thereof, the rear end of the upper frame 10 is also provided with an amplitude-variable counterweight mechanism, the amplitude-variable counterweight 11 is controlled to rotate around the hinge point 1101 of the amplitude-variable counterweight through the amplitude oil cylinder 12, the gravity center position of the amplitude-variable counterweight 11 is changed, so as to balance the gravity center change of the whole machine, the whole machine is in a stable state under different load operations, and the control comfort is improved. The utility model discloses tunnel excavator equipment can bear bigger work load, and the digging force promotes by a wide margin, and organism gyration operation receives the space influence less, high efficiency operation in the tunnel, and the complete machine trafficability characteristic is good.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims (10)

1. The working device of the tunnel excavator is characterized by comprising an L-shaped movable arm (1), an arm cylinder (2), a movable arm cylinder (3), an arm, an upper frame (10) and a working accessory, wherein the rear end of the L-shaped movable arm (1) is provided with an upper frame hinge joint (101) hinged with the front end of the upper frame (10), an arm hinge joint (104) at the front end of the L-shaped movable arm (1) is hinged with the arm, the rear end of the movable arm cylinder (3) is hinged with the front end of the upper frame (10), the front end of the movable arm cylinder (3) is hinged with a movable arm cylinder hinge joint (103) of the L-shaped movable arm (1), the arm hinge joint (103) is located at a position close to the front end of the L-shaped movable arm (1), the rear end of the arm cylinder (2) is hinged with a first arm cylinder hinge joint (102) of the L-shaped movable arm (1), and the front end of the arm cylinder (2) is hinged with the rear end of the arm, the front end of the bucket rod is provided with the operation accessory.

2. The tunneling machine working apparatus according to claim 1, wherein the L-shaped boom (1) is a box-type structure having an "L" shape, and the arm cylinder hinge point (102) is located at a lower side of the L-shaped boom (1).

3. The tunneling machine working apparatus according to claim 1, wherein the cross-sectional area of the bend of the L-shaped boom (1) is larger than the cross-sectional area of the other portion of the L-shaped boom (1), and the cross-sectional area of the L-shaped boom (1) is gradually reduced from the bend to the front end, and the cross-sectional area of the L-shaped boom (1) is gradually reduced from the bend to the rear end.

4. The tunneling machine working apparatus according to claim 1, wherein the arm is a triangular arm (4), the triangular arm (4) is provided with a boom hinge point (402) hinged to the arm hinge point (104), a second arm cylinder hinge point (405) hinged to a front end of the arm cylinder (2), and a work attachment hinge point (404) for mounting the work attachment, the boom hinge point (402), the work attachment hinge point (404), and the second arm cylinder hinge point (405) are respectively located at triangular vertices of the triangular arm (4), the boom hinge point (402) is located at an upper side of the triangular arm (4), and the second arm cylinder hinge point (405) is located at a lower side of the triangular arm (4).

5. The tunneling machine work apparatus according to claim 4, wherein the triangular arm (4) is of an acute triangular configuration.

6. The tunneling machine working device according to claim 4, further comprising a bucket cylinder (5), a rocker (6) and a connecting rod (7), wherein the working accessory is a bucket (8), one end of the bucket (8) is hinged to a hinge point (404) of the working accessory, the other end of the bucket (8) is hinged to one end of the connecting rod (7), one end of the rocker (6) is hinged to a hinge point (403) of the triangular bucket rod (4), the other end of the rocker (6) is hinged to the other end of the connecting rod (7), the front end of the bucket cylinder (5) is hinged to a hinge point between the rocker (6) and the connecting rod (7), and the rear end of the bucket cylinder (5) is hinged to a hinge point (401) of the triangular bucket rod (4).

7. The working device of the tunnel excavator as claimed in claim 6, wherein the bucket (8) is a tailor-welded high-strength steel plate, the bucket teeth (801) and the side edge protection plates (802) of the bucket (8) are made of wear-resistant steel castings, and the side surfaces of the bucket (8) are provided with wear-resistant reinforcing plate structures.

8. The working apparatus of a tunnel excavator according to claim 1, wherein a luffing counterweight mechanism is provided at a rear end of the upper frame (10).

9. The working device of the tunnel excavator according to claim 8, wherein the luffing counterweight mechanism comprises a luffing counterweight (11) and a luffing cylinder (12), the luffing counterweight (11) is provided with a counterweight hinge point (1101) hinged to the upper frame (10), one end of the luffing cylinder (12) is hinged to the upper frame (10), the other end of the luffing cylinder (12) is hinged to a counterweight cylinder hinge point (1102) of the luffing counterweight (11) so as to drive the luffing counterweight (11) to rotate around the counterweight hinge point (1101), the two counterweight hinge points (1101) are symmetrically arranged on two sides of the luffing counterweight (11), and the two counterweight cylinder hinge points (1102) are symmetrically arranged on two sides of the luffing counterweight (11).

10. An excavator, characterized by comprising a working device and a chassis (9), the working device being a tunnel excavator working device according to any one of claims 1-9.

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