Large-stroke telescopic cutting arm with built-in water-cooled motor

Abstract

According to the large-stroke telescopic cutting arm with the built-in water-cooled motor, an outer cylinder and an inner cylinder which are used as telescopic structures are installed in a supporting cylinder, the inner cylinder can move in a telescopic mode relative to the outer cylinder, the motor is fixedly installed in the inner cylinder, and a water-cooled cavity which is spirally arranged is formed between the motor and the inner cylinder. The spray head is mounted on the connecting flange at the end of the inner barrel, cooling water after heat exchange with the motor can be sprayed out through the spray head to cool a cutting head at the front end of the cutting arm, the arrangement space of the motor is saved due to the structural arrangement, and meanwhile, the special water-cooling cooling structure can ensure the heat dissipation performance of the high-power motor, so that the service life of the high-power motor is prolonged. And full-section continuous operation of cutting operation in a roadway can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting arm equipment, in particular to a telescopic cutting arm with a large stroke and an internally-mounted water-cooled motor. Background Art

[0002] A cutting arm is a structure connecting a cutting head and the main body of a roadheader. The movement of the cutting arm is used to control the cutting head to perform tunneling cutting at corresponding positions in a roadway. The rotation of the cutting head is powered by a cutting motor. Since the resistance of the cutting head during operation in the roadway is relatively large, a high-power motor is generally used as the power drive for the cutting motor. To ensure the normal use of the high-power motor, the cutting motor needs to be installed at the end of the telescopic mechanism, outside the cutting arm to facilitate its own heat dissipation. However, the above installation method will increase the ineffective length distance of the cutting arm to a certain extent, and the heat dissipation effect is not good, so it cannot continuously operate for a long time. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a telescopic cutting arm with a large stroke and an internally-mounted water-cooled motor. The motor is located inside the telescopic structure, and a water-cooling cavity for water-cooling is provided between the motor and the telescopic structure, which solves the problems in the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows: A telescopic cutting arm with a large stroke of an internally water-cooled motor, which includes a front end plate arranged vertically. On one side of the front end plate, a support cylinder is installed. On the other side of the front end plate, two inner side plates arranged side by side are installed. A lining plate is installed between the two inner side plates. An outer cylinder is fitted and installed in the support cylinder. One end of the outer cylinder passes through the support cylinder, and the other end of the outer cylinder passes through the lining plate. An inner cylinder that can telescopically move is fitted and installed in the outer cylinder. A motor is fixedly installed in the inner cylinder. A helically arranged flow guide plate is installed on the outer shell of the motor. A water-cooling cavity is formed between the flow guide plate and the inner wall of the inner cylinder. An inlet hole is opened at the end of the motor located in the inner cylinder, and the inlet hole is communicated with the water-cooling cavity. One end of the inner cylinder extending out of the outer cylinder is installed with a connecting flange. A number of spray heads arranged in a circle are installed on the outer circumference of the connecting flange. A first drainage channel communicating with each other is opened inside the connecting flange corresponding to each spray head. A second drainage channel communicating with each first drainage channel is opened in the inner cylinder, and each second drainage channel is communicated with the water-cooling cavity. Two outer side plates arranged side by side are installed on both sides of the front end plate. The outer side plates are located outside the inner side plates. An inclined rib plate is installed between the outer side plate and the inner side plate on the corresponding side. A hinge seat is installed between the outer side plate and the inner side plate near the position of the front end plate. Hinge ring backing plates are installed inside the outer side plate and the inner side plate far from the position of the front end plate. A limit flange is installed at the end of the inner cylinder. A horizontally arranged wear-resistant plate is installed inside the inner side plate. Sliders cooperating with the wear-resistant plate are installed on both sides of the limit flange. Front gland and rear gland are respectively installed at the ends of both sides of the outer cylinder. A piston ring is installed on the outer circumference of the inner cylinder. The piston ring is located between the front gland and the rear gland. The piston ring divides the cavity between the outer cylinder and the inner cylinder into two oil inlet cavities. A first sealing ring is installed on the inner circumference of the piston ring, and a second sealing ring is installed on the outer circumference of the piston ring. A limit boss is provided on the end face of the motor, and a limit groove cooperating with the limit boss is opened at the end of the inner cylinder.

[0005] The positive effect of the utility model lies in that: For the telescopic cutting arm with a large stroke of an internally water-cooled motor described in the utility model, an outer cylinder and an inner cylinder as a telescopic structure are installed in the support cylinder. The inner cylinder can telescopically move relative to the outer cylinder. A motor is fixedly installed in the inner cylinder. A helically arranged water-cooling cavity is provided between the motor and the inner cylinder. Spray heads are installed on the connecting flange at the end of the inner cylinder. The cooling water after heat exchange with the motor can be sprayed out through the spray heads to cool the cutting head at the front end of the cutting arm. The setting of the above structure saves the layout space of the motor. At the same time, the dedicated water-cooling structure can ensure the heat dissipation performance of the high-power motor, and can realize the full-section continuous operation of the cutting operation in the roadway. Description of the Drawings

[0006] Figure 1 is the three-dimensional structure diagram of the utility model;

[0007] Figure 2 is the top view of the utility model;

[0008] Figure 3 is Figure 2 the left view of;

[0009] Figure 4 is Figure 2 the right view of;

[0010] Figure 5 is Figure 2 the sectional view taken along the line A-A in;

[0011] Figure 6 the structural schematic diagram of the motor;

[0012] Figure 7 is Figure 2 the enlarged view of the sectional view taken along the line B-B in;

[0013] Figure 8 is Figure 2 the enlarged view of the sectional view taken along the line C-C in;

[0014] Figure 9 is Figure 5 the enlarged partial view of I in;

[0015] Figure 10 is Figure 5 the enlarged partial view of II in;

[0016] Figure 11 is Figure 5 the enlarged partial view of III in. Detailed implementation manner

[0017] A telescopic cutting arm with a large stroke of an internally water-cooled motor according to the present utility model, as Figure 1-5 shown, includes a front end plate 1 arranged vertically. A support cylinder 2 is installed on one side of the front end plate 1, and two inner side plates 3 arranged side by side are installed on the other side of the front end plate 1. A lining plate 4 is installed between the two inner side plates 3. The above-mentioned front end plate 1, inner side plate 3 and support cylinder 2 constitute the basic skeleton of the cutting arm.

[0018] An outer cylinder 5 is fitted and installed in the support cylinder 2. The outer cylinder 5 is relatively fixedly arranged on the front end plate 1. One end of the outer cylinder 5 passes through the support cylinder 2, and the other end of the outer cylinder 5 passes through the lining plate 4. An inner cylinder 6 that can telescopically move is fitted and installed in the outer cylinder 5. A motor 7 is fixedly installed in the inner cylinder 6, and the motor 7 can synchronously telescopically move relative to the inner cylinder 6 with respect to the outer cylinder 5.

[0019] To achieve effective heat dissipation of the motor 7, as Figure 6As shown in the figure, a spiral arrangement of guide plates 8 is installed on the outer shell of the motor 7. A water-cooling cavity 9 is formed between the guide plates 8 and the inner wall of the inner cylinder 6. The water-cooling cavity 9 is located between the motor 7 and the inner cylinder 6 and is arranged in a spiral shape. An inlet hole 10 is provided at the end of the motor 7 located in the inner cylinder 6. The inlet hole 10 communicates with the water-cooling cavity 9. One end of the inner cylinder 6 extending out of the outer cylinder 5 is provided with a connecting flange 11, and the connecting flange 11 is used to install a speed reducer and a cutting head. A number of spray nozzles 12 arranged in a circle are installed on the outer circumference of the connecting flange 11. A first drainage channel 13 communicating with each other is provided inside the connecting flange 11 corresponding to each spray nozzle 12. A second drainage channel 14 communicating with each first drainage channel 13 is provided in the inner cylinder 6, and each second drainage channel 14 communicates with the water-cooling cavity 9.

[0020] Cooling water can enter the water-cooling cavity 9 through the inlet hole 10, exchange heat on the outer circumference of the motor 7. After heat exchange, the cooling water will enter the first drainage channel 13 and the second drainage channel 14, and finally be sprayed out through the spray nozzles 12 to cool the cutting head. A set of cooling and temperature reduction structure can simultaneously cool and cool the motor 7 and the cutting head. An elastic telescopic bellows and a drag chain for bundling pipelines can be installed at the position of the inlet hole 10. While ensuring the synchronous movement of the cooling water pipeline with the motor 7 and the inner cylinder 6, it is ensured that the pipeline will not bend and the normal transportation of cooling water is carried out.

[0021] To realize the installation of the cutting arm on the body of the tunneling equipment, two outer side plates 15 arranged side by side are installed on both sides of the front end plate 1. The outer side plates 15 are located outside the inner side plates 3. To improve the strength of the overall skeleton, a diagonal rib plate 16 is installed between the outer side plate 15 and the inner side plate 3 on the corresponding side. As Figure 7 and Figure 8 shown in the figure, a hinge seat 17 is installed between the outer side plate 15 and the inner side plate 3 near the front end plate 1. Hinge ring pads 18 are installed inside the outer side plate 15 and the inner side plate 3 at positions far from the front end plate 1. The above-mentioned hinge seat 17 and hinge ring pads 18 can realize the detachable hinge connection of the cutting arm on the body and can control the cutting operation action of the overall cutting arm through a moving device such as a telescopic cylinder.

[0022] Furthermore, to realize the axial limit when the inner cylinder 6 moves telescopically relative to the outer cylinder 5, a limit flange 19 is installed at the end of the inner cylinder 6. The limit flange 19 cannot enter the outer cylinder 5. When the limit flange 19 moves to contact the outer cylinder 5, the inner cylinder 6 moves to the limit position. To realize the limit and guidance of the inner cylinder 6 between the two inner side plates 3 during movement, wear-resistant plates 20 arranged horizontally are installed on the inner sides of the inner side plates 3. Sliders 21 cooperating with the wear-resistant plates 20 are installed on both sides of the limit flange 19.

[0023] Further, front gland 22 and rear gland 23 are respectively installed at both end portions of the outer cylinder 5. A piston ring 24 is installed on the outer periphery of the inner cylinder 6. The piston ring 24 is located between the front gland 22 and the rear gland 23. The piston ring 24 divides the cavity between the outer cylinder 5 and the inner cylinder 6 into two oil inlet cavities 25. After hydraulic oil enters one of the oil inlet cavities 25, it will push the piston ring 24 to drive the inner cylinder 6 to telescopically move relative to the outer cylinder 5. To improve the sealing performance of the piston ring 24 for the two oil inlet cavities 25 on both sides, a first sealing ring 26 is installed on the inner periphery of the piston ring 24, and a second sealing ring 27 is installed on the outer periphery of the piston ring 24.

[0024] Further, to achieve the fixed installation of the motor 7 in the inner cylinder 6, a limiting boss 28 is provided on the end face of the motor 7, and a limiting groove 29 matching with the limiting boss 28 is opened at the end of the inner cylinder 6. The matching limiting groove 29 and limiting boss 28 provide limitation for the installation of the motor 7, and the motor 7 and the inner cylinder 6 can be fixedly connected by welding.

[0025] Through the telescopic movement of the inner cylinder 6 relative to the outer cylinder 5, the cutting head at the front end can be driven to move synchronously, realizing the telescopic function with a stroke of one meter. Through the circulating heat exchange and cooling of the motor 7 by cooling water and the drainage of the nozzle 12 on the outer periphery of the connecting flange 11, the corresponding cooling of the motor 7 and the cutting head is realized. The structures of the inner cylinder 6 and the outer cylinder 5 are the same as those of a telescopic oil cylinder, and the relative telescopic movement of the inner cylinder 6 can be realized by the inlet and outlet of hydraulic oil.

[0026] The above-mentioned cutting arm can move following the orientation of the main body part of the roadheader-anchoring machine through the connecting pin of the cutting part, and drive the cutting head to realize the full-section cutting operation through the forward and backward movement of the telescopic inner cylinder. It can realize that the roadheader is centered during construction, and according to the pre-determined program, it can be formed at one time. The roadway forming speed is fast and the accuracy is high. The cutting action does not depend on manual operation, getting rid of the skill dependence on the roadheader driver, avoiding the time for the equipment to move left and right during the tunneling process. When cutting a roadway with a large cross-section, high rock hardness and poor conditions, it can realize continuous operation in one anchor support operation cycle, avoiding secondary repair, greatly reducing the operation time and improving the production efficiency.

[0027] The cutting arm of the present utility model has the following advantages: 1. The large stroke of the telescopic movement realizes full-section continuous operation. 2. The highly reliable self-telescopic structure greatly improves the body strength, reduces the equipment failure rate and equipment maintenance time. 3. It realizes the one-time forming operation according to the pre-determined program, avoiding the equipment left and right movement operation and the secondary repair process during the tunneling process, reducing the operation time, improving the production efficiency, and effectively ensuring the personal health and safety of the driver.

[0028] The cutting arm described in the utility model can solve the problem that the equipment cannot realize full-section automatic positioning cutting and continuous excavation operation when operating under the conditions of high hardness of rock strata, large cross-section and poor environment in the excavation tunnel. It overcomes the problems of poor adaptability, high failure rate and low production efficiency of traditional anchor digging machines, replaces the large and expensive integrated anchor digging machines, improves the reliability, advancement and efficiency of anchor digging equipment, improves the health and safety of underground workers, and achieves the purpose of safe and efficient excavation construction operations.

[0029] The technical solution of the present invention is not limited to the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all known technologies.

Claims

1. A telescopic cutting arm with a built-in water-cooled motor and a large stroke, characterized in that: The invention comprises a front end plate (1) arranged vertically, a supporting cylinder (2) being installed on one side of the front end plate (1), two inner plates (3) arranged side by side being installed on the other side of the front end plate (1), a lining plate (4) being installed between the two inner plates (3), an outer cylinder (5) being installed in cooperation with the supporting cylinder (2), one end of the outer cylinder (5) passing through the supporting cylinder (2), the other end of the outer cylinder (5) passing through the lining plate (4), an inner cylinder (6) being installed in cooperation with the outer cylinder (5) and being capable of telescopic movement, a motor (7) being fixedly installed in the inner cylinder (6), a spirally arranged guide plate (8) being installed on the outer shell of the motor (7), the guide plate (8) and the inner cylinder (6) being connected to each other. A water cooling chamber (9) is formed between the inner walls of the inner tube (6), a water inlet hole (10) is provided at the end of the motor (7) in the inner tube (6), and the water inlet hole (10) is connected to the water cooling chamber (9). A connecting flange (11) is installed at one end of the inner tube (6) extending out of the outer tube (5), and a plurality of nozzles (12) arranged in a circumference are installed on the outer circumference of the connecting flange (11). A first drainage channel (13) connected to each nozzle (12) is provided inside the connecting flange (11), and the inner tube (6) is provided with a second drainage channel (14) connected to each first drainage channel (13), and each second drainage channel (14) is connected to the water cooling chamber (9).

2. The telescopic cutting arm with a built-in water-cooled motor and a large stroke according to claim 1, characterized in that: Two outer plates (15) arranged side by side are installed on both sides of the front end plate (1), the outer plates (15) are located outside the inner plates (3), an oblique rib plate (16) is installed between the outer plates (15) and the inner plates (3) on the corresponding side, a hinge seat (17) is installed between the outer plates (15) and the inner plates (3) at a position close to the front end plate (1), and a hinge ring pad (18) is installed inside the outer plates (15) and the inner plates (3) at a position far from the front end plate (1).

3. The telescopic cutting arm with a built-in water-cooled motor and a large stroke according to claim 1, characterized in that: A limiting flange (19) is installed at the end of the inner cylinder (6), a horizontally arranged wear-resistant plate (20) is installed on the inner side of the inner plate (3), and sliding blocks (21) matching the wear-resistant plate (20) are installed on both sides of the limiting flange (19).

4. The telescopic cutting arm with a built-in water-cooled motor and a large stroke according to claim 1, characterized in that: The ends of both sides of the outer cylinder (5) are respectively mounted with a front gland (22) and a rear gland (23); a piston ring (24) is mounted on the outer periphery of the inner cylinder (6); the piston ring (24) is located between the front gland (22) and the rear gland (23); the piston ring (24) divides the cavity between the outer cylinder (5) and the inner cylinder (6) into two oil inlet cavities (25); a first sealing ring (26) is mounted on the inner periphery of the piston ring (24); and a second sealing ring (27) is mounted on the outer periphery of the piston ring (24).

5. The telescopic cutting arm with a built-in water-cooled motor and a large stroke according to claim 1, characterized in that: The end surface of the motor (7) is provided with a limiting boss (28), and the end of the inner cylinder (6) is provided with a limiting groove (29) that matches the limiting boss (28).

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