Protective cover for cutting head of roadheader

Abstract

The utility model discloses a protective cover for a cutting head of a fully-mechanized coal winning machine, which relates to the technical field of fully-mechanized coal winning machines and comprises a telescopic frame and a protective cover fixed on the telescopic frame. The telescopic frame comprises a fixed frame, a sliding frame and a sliding driving device; wherein the fixed frame is fixed on the roadheader, the sliding frame is slidably mounted on the fixed frame and can extend to the upper part of the cutting head, and the sliding driving device is mounted on the fixed frame and is used for driving the sliding frame to slide; the protective cover is installed at the tail end of the sliding frame and comprises an upper protective cover body, a left protective cover body and a right protective cover body. The left protective cover and the right protective cover are hinged to the left side and the right side of the upper protective cover through hinge shafts. And after the left protective cover and the right protective cover are overturned downwards, the left protective cover and the right protective cover form a cover body structure which covers the upper part and the side part of the cutting head together with the upper protective cover. Through limiting of the telescopic frame, the position degree of the cutting head shield is guaranteed, and the situation that due to the improper placing position of the cutting head shield, a larger potential safety hazard is caused when a cannon head is started accidentally is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of comprehensive excavator, especially relates to a comprehensive excavator cutting head shield. BACKGROUND

[0002] The cutting head (cannon head) of the tunneling machine needs to be properly protected during the maintenance period to prevent accidental start-up from causing personal injury. Although the traditional cage type protective shell plays a protective role to some extent, it is heavy and inconvenient, easily damaged and has poor protection effect, and other shortcomings, which has been difficult to meet the safety protection needs of modern tunneling machines. Especially during the manual lifting and placing process, not only the labor intensity of the workers is increased, but also more serious safety hazards may be caused by improper placement when the cannon head is accidentally started. SUMMARY

[0003] The utility model aims at providing a comprehensive excavator cutting head shield, which realizes effective protection of the cutting head through the telescopic frame and the reversible shield structure, reduces the labor intensity of the workers, and improves the safety.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a comprehensive excavator cutting head shield, which comprises a telescopic frame and a shield fixed on the telescopic frame. The telescopic frame comprises a fixed frame, a sliding frame and a sliding drive device. The fixed frame is fixed on the comprehensive excavator, the sliding frame is slidingly installed on the fixed frame and can be extended above the cutting head, and the sliding drive device is installed on the fixed frame to drive the sliding frame to slide. The shield is installed at the end of the sliding frame and comprises an upper shield, a left shield and a right shield. The left shield and the right shield are hinged to the left and right sides of the upper shield through a hinge shaft. When the left shield and the right shield are turned down, they form a shield body structure together with the upper shield, which is arranged above and on the side of the cutting head.

[0005] After adopting the above structure, when the cutting head shield is not working, it is retracted above the comprehensive excavator through the telescopic frame. At this time, the left shield and the right shield are not turned down and are supported on the top of the upper shield, forming a stable structure and not affecting the cutting head. When the cutting head shield needs to work, the telescopic frame drives the shield to extend above the cutting head, and then turns the left shield and the right shield down by a certain angle to form a shield body structure covering the cutting head. Thus, effective protection of the cutting head is realized, the labor intensity of the workers is reduced, and the safety is improved. Through the limiting of the telescopic frame, the position of the cutting head shield is ensured, and more serious safety hazards caused by improper placement when the cannon head is accidentally started are avoided.

[0006] Preferably, the upper shield is provided with a turnover drive device for driving the left shield and the right shield to turn down. Through this design, the left shield and the right shield are quickly opened, the labor intensity of the workers is further reduced, and the safety is improved.

[0007] Preferably, the turnover driving device comprises a gear fixed on the hinge shaft, a rack slidingly installed on the upper cover and engaged with the gear, and a cylinder fixed on the upper cover and having an output shaft fixed on one end of the rack. By this design, the equipment cost of the turnover driving device is reduced, while the opening and closing stability of the left and right covers is ensured.

[0008] Preferably, the outer cover of the turnover driving device is provided with a protective shell. By this design, the turnover driving device is protected from the interference and damage of the external environment.

[0009] Preferably, the fixed frame comprises left and right guide rails oppositely arranged; the sliding frame comprises left and right supports oppositely arranged, the left support being slidingly installed along the front-back direction of the left guide rail, and the right support being slidingly installed along the front-back direction of the right guide rail; the upper surfaces of the left and right guide rails are provided with long holes, and the left and right supports are provided with support blocks which pass through the long holes and are fixed upward on the cover. By this design, the cover is prevented from interfering with the telescopic frame during storage.

[0010] Preferably, the upper portions of the left and right supports are provided with a connecting rod, the left and right sides of the connecting rod are provided with support posts which pass downward through the long holes and are fixed on the corresponding left or right support, and the output shaft of the sliding driving device is fixed on the connecting rod. By this design, the sliding driving device drives the whole sliding frame to move.

[0011] Preferably, the upper cover comprises a frame and a cover net fixed in the frame. By this design, the upper cover is both light and has good protection effect.

[0012] Preferably, the bottom of the fixed frame is provided with a mounting plate, and the mounting plate is provided with a waist-shaped mounting hole. By this design, the stable installation of the fixed frame is ensured.

[0013] Preferably, when the left and right covers are not turned over, they are supported on the top of the upper cover. By this design, the stable support of the left and right covers is ensured.

[0014] Preferably, the turning-over angle of the left and right covers is less than 90°. By this design, the maximum coverage angle is ensured, and the maximum protection effect is achieved.

[0015] After the above technical solutions are adopted, the present application has the following advantages:

[0016] The utility model relates to a kind of comprehensive excavator cutting head protective cover, which solves the technical problems of increasing the labor intensity of workers and causing greater safety hazards when the cutting head is accidentally started due to improper placement in the prior art.The utility model realizes effective protection of the cutting head by telescopic frame and reversible shield structure, reduces the labor intensity of workers and improves safety. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the installation position structure diagram of the utility model of a kind of comprehensive excavator cutting head protective cover;

[0018] Figure 2 is the structure diagram of the utility model of a kind of comprehensive excavator cutting head protective cover working state;

[0019] Figure 3 is Figure 2 structure diagram when left shield and right shield are not unfolded;

[0020] Figure 4 is the structure diagram of the utility model of a kind of comprehensive excavator cutting head protective cover non-working state;

[0021] Figure 5 is Figure 2 the local enlarged view of A.

[0022] In the figure, 1, telescopic frame, 11, fixed frame, 111, left guide rail, 112, right guide rail, 113, long hole, 114, mounting plate, 12, sliding frame, 121, left support, 122, right support, 123, support block, 124, connecting rod, 13, sliding drive device, 2, shield, 21, upper shield, 211, frame, 212, shield net, 22, left shield, 23, right shield, 24, turnover drive device, 241, gear, 242, rack, 243, air cylinder, 3, comprehensive excavator, 31, cutting head. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the drawings.

[0024] The directions involved in this specification are based on the normal working direction of the utility model of a kind of comprehensive excavator cutting head protective cover, and are not limited to the storage and transportation directions, representing only relative position relationship, not absolute position relationship.

[0025] As Figure 1 , Figure 2 , Figure 3 and Figure 4 together shown, a kind of comprehensive excavator cutting head protective cover, including telescopic frame 1 and fixed in telescopic frame 1 on shield 2.

[0026] The telescopic frame 1 comprises a fixed frame 11, a sliding frame 12 and a sliding driving device 13, wherein the fixed frame 11 is fixed on the fully-mechanized coal mining machine 3, the sliding frame 12 is slidingly installed on the fixed frame 11 and can be extended above the cutting head 31, and the sliding driving device 13 is installed on the fixed frame 11 for driving the sliding frame 12 to slide. The fixed frame 11 provides stable support and sliding track for the sliding frame 12, and the sliding driving device 13 is responsible for driving the sliding frame 12 to move along the fixed frame 11 to adapt to the working requirements of the cutting head at different positions.

[0027] The shield 2 is installed at the end of the sliding frame 12 and comprises an upper shield 21, a left shield 22 and a right shield 23; wherein the left shield 22 and the right shield 23 are hinged on the left and right sides of the upper shield 21 through a hinge shaft. When the left shield 22 and the right shield 23 are turned down, they form a shield body structure together with the upper shield 21, which is shielded above and on the side of the cutting head 31, thereby providing comprehensive protection.

[0028] The opening and closing state of the shield 2: when the left shield 22 and the right shield 23 are not turned down, they are supported on the top of the upper shield 21, forming a stable support structure, which ensures that the shield can be stably placed on the fully-mechanized coal mining machine when not working. When working is needed, the left shield 22 and the right shield 23 are turned down by a certain angle to form a shield body structure covering the cutting head; the turning-down angle of the left shield 22 and the right shield 23 is usually between 45° and 90°, but in order to ensure the maximum covering angle and protection effect, the turning-down angle is usually less than 90°.

[0029] Further, the upper shield 21 is provided with a turning-down driving device 24 for driving the left shield 22 and the right shield 23 to turn down. The upper shield 21 is provided with the turning-down driving device 24 for driving the left shield 22 and the right shield 23 to turn down, so as to realize the rapid opening and closing of the shield 2.

[0030] As shown in Figure 5 The turning-down driving device 24 can adopt various structures, such as driving the hinge shaft to rotate through a stepping motor, thereby realizing the turning-down of the left shield 22 and the right shield 23. In this embodiment, in order to ensure the position degree of turning-down and reduce the cost of the equipment, the turning-down driving device 24 comprises a gear 241 fixed on the hinge shaft, a rack 242 slidingly installed on the upper shield 21 and meshing with the gear 241, and a pneumatic cylinder 243 fixed on the upper shield 21 and having its output shaft fixed on one end of the rack 242. Through the extension and retraction movement of the pneumatic cylinder 243, the rack 242 is driven to move left and right, and then the gear 241 drives the left shield 22 and the right shield 23 to turn down.

[0031] The utility model discloses a comprehensive excavator cutting head shield 2 passes through telescopic frame 1 and the design of the shield 2 that can overturn, realized the comprehensive protection to cutting head, can be adjusted position and coverage range flexibly according to the operation demand. The design of overturning drive device 24 and the protective shell further improves the reliability and durability of shield 2, provides more safe working environment for operating personnel.

[0032] The outer side of the overturning drive device 24 is also covered with a protective shell (not shown in the figure) to protect it from interference and damage from the external environment.

[0033] Further, the fixed frame 11 includes left and right guide rails 111 and 112 arranged opposite to each other, and the sliding frame 12 includes left and right supports 121 and 122 arranged opposite to each other, the left support 121 being slidingly installed along the front-to-back direction of the left guide rail 111, and the right support 122 being slidingly installed along the front-to-back direction of the right guide rail 112; the upper surfaces of the left and right guide rails 111 and 112 are provided with long holes 113, and the left and right supports 121 and 122 are provided with support blocks 123, the support blocks 123 passing through the long holes 113 and being fixed upward on the shield 2 to provide stable support. Through this structure, the shield 2 can always be located above the fixed frame 11 and the sliding frame 12, thereby avoiding interference when sliding.

[0034] The upper portions of the left and right supports 121 and 122 are provided with a connecting rod 124, the left and right sides of the connecting rod 124 are respectively provided with support columns, the support columns pass downward through the long holes 113 and are fixed on the corresponding left or right support 121 or 122, and the output shaft of the sliding drive device 13 is fixed on the connecting rod 124, so as to realize the driving of the sliding drive device 13 to move the sliding frame 12 as a whole.

[0035] Further, the upper shield 21 includes a sturdy frame 211 and a light-weight, high-strength shield net 212 fixed in the frame, which not only ensures the protection effect but also reduces the overall weight.

[0036] The bottom of the fixed frame 11 is provided with a mounting plate 114, the mounting plate 114 is provided with a waist-shaped mounting hole, the fixed frame 11 can be firmly fixed on the comprehensive excavator 3 through the fasteners such as bolts, and the design of the waist-shaped mounting hole also provides a certain installation adjustment space.

[0037] Of course, the above description is not a limitation of the utility model, the utility model is also not limited to the above examples, and the changes, modifications, additions or replacements made by the technical personnel in the technical field within the essential scope of the utility model should also belong to the protection scope of the utility model.

Claims

1. A protective cover for the cutting head of a roadheader, characterized in that: Includes a telescopic frame and a protective cover fixed to the telescopic frame; The telescopic frame includes a fixed frame, a sliding frame, and a sliding drive device; wherein the fixed frame is fixed on the roadheader, the sliding frame is slidably mounted on the fixed frame and can extend above the cutting head, and the sliding drive device is mounted on the fixed frame for driving the sliding frame to slide. The protective cover is installed at the end of the sliding frame and includes an upper protective cover, a left protective cover, and a right protective cover; the left and right protective covers are hinged to the left and right sides of the upper protective cover via hinge shafts. When the left and right protective covers are flipped downwards, they together with the upper protective cover form a cover structure that covers the top and sides of the cutting head.

2. The head cover for a roadheader according to claim 1, characterized in that: The upper cover is provided with a flipping drive device that drives the left cover and the right cover to flip downwards.

3. A cutting head cover for a roadheader according to claim 2, characterized in that: The flipping drive device includes a gear fixed on a hinge shaft, a rack that slides left and right on the upper cover and meshes with the gear, and a cylinder fixed on the upper cover with its output shaft fixed to one end of the rack.

4. A cutting head cover for a roadheader according to claim 3, characterized in that: The outer side of the flipping drive device is covered with a protective shell.

5. A cutting head cover for a roadheader according to claim 1, characterized in that: The fixed frame includes a left guide rail and a right guide rail arranged opposite to each other; the sliding frame includes a left bracket and a right bracket arranged opposite to each other, the left bracket being slidably installed along the front-back direction of the left guide rail; the right bracket being slidably installed along the front-back direction of the right guide rail. The upper surfaces of the left and right guide rails are provided with elongated holes, and the left and right brackets are provided with support blocks. The support blocks pass through the elongated holes and are fixed upwards to the protective cover.

6. A cutting head cover for a roadheader according to claim 5, characterized in that: A connecting rod is provided above the left and right supports, and a support column is provided on the left and right sides of the connecting rod respectively. The support column passes downward through the elongated hole and is fixed on the corresponding left or right support. The output shaft of the sliding drive device is fixed on the connecting rod.

7. A cutting head cover for a roadheader according to claim 1, characterized in that: The upper protective cover includes a frame and a mesh cover fixed within the frame.

8. A cutting head cover for a roadheader according to claim 1, characterized in that: The bottom of the fixing frame is provided with a mounting plate, and the mounting plate is provided with an oblong mounting hole.

9. A cutting head cover for a roadheader according to claim 1, characterized in that: When the left and right shields are not flipped, they are supported on top of the upper shield.

10. A cutting head cover for a roadheader according to claim 9, characterized in that: The left and right protective covers are flipped downwards at an angle of less than 90°.

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