Telescopic shield for cutting head of heading machine

Abstract

The utility model relates to a telescopic shield for a cutting head of a heading machine, which comprises a fixed frame, a hydraulic cylinder, a telescopic frame and a protective component, and guide rail components are symmetrically arranged at two ends of the fixed frame; the guide rail assembly comprises a plurality of guide rails which are arranged in parallel; the guide rail on the outermost side in the guide rail assembly is fixed to the fixing frame, and one end of the outward side of each of the other guide rails is rotationally connected with a pulley. The pulleys are arranged in the adjacent guide rails in a sliding manner; a supporting frame is fixed between the guide rails on the innermost side of the two guide rail assemblies. The protection assembly is arranged on the supporting frame. One end of the telescopic frame is hinged to the fixing frame, and the other end of the telescopic frame is hinged to the supporting frame. The hydraulic cylinder is arranged on the fixing frame, and a piston rod of the hydraulic cylinder is hinged to the telescopic frame. Through the hydraulic cylinder and the telescopic frame, the telescopic frame stretches out and retracts back along with the piston rod of the hydraulic cylinder, so that the supporting frame moves in a telescopic mode, the small hydraulic cylinder can be adopted, and manufacturing cost is low.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of heading machine, and particularly relates to a telescopic shield for the cutting head of a heading machine. BACKGROUND

[0002] Heading machines are widely used in rock mining, and the main working component is the cutting head at the front end of the heading machine. After the heading machine is stopped, a cutting head protective cover needs to be used to prevent cutting head injury accidents. A kind of hydraulic telescopic shield for cutting head of fully-mechanized heading machine and its implementation method are disclosed in Chinese patent CN113202468A, comprising fixed frame, outer sleeve mounted on the top of fixed frame left and right sides, inner sleeve slidingly connected in the inner cavity of outer sleeve and protective cover fixed on the top of inner sleeve by support rod, outer sleeve and inner sleeve form two-arm two-stage sleeve type telescopic structure, the inner cavity of outer sleeve is provided with oil cylinder, the piston rod and cylinder body of oil cylinder are connected with inner sleeve and outer sleeve respectively, the opposite side of two inner sleeves is provided with winding mechanism, winding mechanism is rotatably connected with the center of protective cover, the moving end of winding mechanism is fixedly connected with the side wall of protective cover. The coverage protection of cutting head is solved, but the above technical solution uses two large oil cylinders, the cost is higher, and energy is consumed. SUMMARY

[0003] The utility model aims at providing a kind of telescopic shield for the cutting head of heading machine, adopt small hydraulic cylinder, and cost is lower.

[0004] To achieve the above object, the utility model adopts the technical scheme of a kind of telescopic shield for the cutting head of heading machine, including fixed frame, hydraulic cylinder, telescopic frame and protective component,

[0005] Both ends of the fixed frame are symmetrically provided with guide rail assemblies;The guide rail assembly includes a plurality of guide rails arranged in parallel, and the heights of the plurality of guide rails gradually decrease from the outside to the inside of the two guide rail assemblies;The outermost guide rail in the guide rail assembly is fixed on the fixed frame, and the end of the outer side of the other guide rails is rotatably connected with at least one pulley;The pulley is slidingly arranged in the adjacent guide rail, and a limit plate is fixed to the end of the guide rail away from the pulley where the pulley is slidingly arranged;The innermost guide rails between the two guide rail assemblies are fixed with a support frame;The protective component is arranged on the support frame;

[0006] One end of the telescopic frame is hingedly connected with the fixed frame, and the other end is hingedly connected with the support frame;The hydraulic cylinder is arranged on the fixed frame, and the piston rod of the hydraulic cylinder is hingedly connected with the telescopic frame.

[0007] Preferably, the telescopic frame comprises at least two telescopic assemblies which are sequentially hinged, the telescopic assembly comprises two first connecting rods, the middle parts of the two first connecting rods are rotationally connected through a first rotating shaft, the piston rod of the hydraulic cylinder is rotationally connected with any one first rotating shaft, the two ends of the at least two telescopic assemblies are respectively hinged with two second connecting rods and two third connecting rods, the ends of the two second connecting rods away from the telescopic assembly are rotationally connected through a second rotating shaft, the lower part of the outermost guide rail of the two guide rail assemblies is provided with a connecting frame, the second rotating shaft is rotationally connected with the connecting frame, and the ends of the two third connecting rods away from the telescopic assembly are respectively rotationally connected with the supporting frame through a third rotating shaft.

[0008] Preferably, the protection assembly comprises a first baffle, a second baffle and a third baffle, the first baffle is connected with the side of the supporting frame away from the fixed frame through a hinge, the second baffle and the third baffle are respectively connected with the two sides of the supporting frame or the innermost guide rail of the two guide rail assemblies through a hinge, and the first baffle, the second baffle and the third baffle can be sequentially stacked on the supporting frame.

[0009] Preferably, the second baffle and the third baffle are both fixed with a fixing assembly, the fixing assembly comprises two fixing seats, the two fixing seats are spaced apart and coaxially provided with pin holes in the transverse direction, and the pin holes are provided with pin shafts, the first baffle is fixed with two locking parts, the two locking parts are matched with the two fixing seats on the second baffle and the third baffle respectively, and the locking part comprises two locking seats and a rotating rod, the two locking seats are spaced apart and coaxially provided with shaft holes in the transverse direction, the middle part of the rotating rod is arc-shaped, the middle part of the rotating rod is fixed with a shaft sleeve matched with the two fixing seats, and the two ends of the rotating rod are inserted into the two shaft holes, and in the rotating process of the rotating rod, the shaft sleeve can be coaxial with the two pin holes.

[0010] Preferably, the fixing assembly further comprises a handle, and the two ends of the handle are fixed on the two fixing seats.

[0011] Preferably, the top plate is fixed on the outermost guide rail of the two guide rail assemblies.

[0012] Compared with the prior art, the telescopic shield for the heading machine cutting head has the following advantages:

[0013] (1) through the hydraulic cylinder and the telescopic frame, the telescopic frame is extended and retracted along with the piston rod of the hydraulic cylinder, the supporting frame is telescopically moved, and therefore a smaller hydraulic cylinder can be adopted, and the manufacturing cost is low;

[0014] (2) By stacking the first baffle, the second baffle and the third baffle on the support frame, when the hydraulic cylinder pushes the support frame to the cutting head, the third baffle, the second baffle and the first baffle on the support frame are flipped in sequence, so that the first baffle, the second baffle and the third baffle block the front and sides of the cutting head, preventing personnel from accidentally touching the cutting head and being injured when the cutting head is stopped.

[0015] (3) The design is simple, easy to use, and has low manufacturing cost. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 A schematic diagram of the internal structure of the fixing frame after the top plate has been removed;

[0018] Figure 3 This is a schematic diagram of the guide rail pulley structure;

[0019] Figure 4 This is a schematic diagram of the bottom structure of the mounting bracket;

[0020] Figure 5 This is a schematic diagram of the protective component structure;

[0021] Figure 6 This is a schematic diagram of the structure after the third baffle is flipped over;

[0022] Figure 7 This is a schematic diagram of the structure after the first, second, and third baffles are flipped. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1-7 As shown, a telescopic protective cover for a tunneling machine cutting head includes a fixed frame 1, a hydraulic cylinder 2, a telescopic frame 3, and protective components.

[0025] The fixed frame 1 has guide rail assemblies symmetrically arranged at both ends; each guide rail assembly includes multiple parallel guide rails 41, the height of which decreases sequentially from the outside to the inside of the two guide rail 41 assemblies; the outermost guide rail 41 is fixed to the fixed frame 1, and each of the other guide rails 41 has at least one pulley 411 rotatably connected to one end on its outward side; the pulleys 411 are slidably arranged within adjacent guide rails 41, and the guide rails 41 from the inside to the outside can extend sequentially in the direction of the hydraulic cylinder 2. Furthermore, a limiting plate 412 is fixed at the end of the guide rail 41 that is slidably disposed with the pulley 411 away from the pulley 411. When the innermost guide rail 41 moves, the pulley 411 of the guide rail 41 moves accordingly within the adjacent guide rail 41. After the pulley 411 contacts the limiting plate 412 of the adjacent guide rail 41, it pushes the adjacent guide rail 41 to move. A support frame 42 is fixed between the innermost guide rail 41 of the two guide rail 41 assemblies. The protective assembly is disposed on the support frame 42 and protects the cutting head through the protective assembly.

[0026] One end of the telescopic frame 3 is hinged to the fixed frame 1, and the other end is hinged to the support frame 42. The hydraulic cylinder 2 is mounted on the fixed frame 1, and the piston rod of the hydraulic cylinder 2 is hinged to the telescopic frame 3. The telescopic frame 3 extends and retracts with the piston rod of the hydraulic cylinder 2, thereby causing the support frame 42 to move telescopically. When the support frame 42 moves, the innermost guide rail 41 moves accordingly, so that except for the outermost guide rail 41, the other guide rails 41 move sequentially from the inside to the outside with the support frame 42. The fixed frame 1 includes a plurality of symmetrically arranged columns 11, which are fixed on the cutting part of the tunneling machine. Support beams 12 are connected to the opposite columns 11, and the cylinder body of the hydraulic cylinder 2 is fixed on the support beam 12.

[0027] Furthermore, the telescopic frame 3 includes at least two telescopic components that are hinged sequentially. Each telescopic component includes two first connecting rods 31, the middle portions of which are rotatably connected via a first rotating shaft 311. The piston rod of the hydraulic cylinder 2 is rotatably connected to any one of the first rotating shafts 311. At least two telescopic components have two second connecting rods 32 and two third connecting rods 33 respectively hinged to their ends. The ends of the two second connecting rods 32 away from the telescopic components are rotatably connected via a second rotating shaft 34. A connecting frame 43 is provided below the outermost guide rail 41 of the two guide rail assemblies. The second rotating shaft 34 is rotatably connected to the connecting frame 43, and the second rotating shaft 34 is located below the piston port of the hydraulic cylinder 2. When the hydraulic cylinder 2 retracts, the telescopic frame 3 can be completely folded. The ends of the two third connecting rods 33 away from the telescopic components are rotatably connected to the support frame 42 via third rotating shafts 35 respectively.

[0028] In this embodiment, the protective assembly includes a first baffle 51, a second baffle 52, and a third baffle 53. The first baffle 51 is connected to the side of the support frame 42 away from the fixed frame 1 via a hinge. A fixed plate 511 is vertically provided at the bottom of the side of the support frame 42 away from the fixed frame 1. One end of the hinge is connected to the first baffle 51, and the other end is connected to the fixed plate 511. The second baffle 52 and the third baffle 53 are respectively connected to the two sides of the support frame 42 or to the innermost guide rail 41 of the two guide rail 41 assemblies via hinges. The first baffle 51, the second baffle 52, and the third baffle 53 can be stacked on the support frame 42 in sequence. When the hydraulic cylinder 2 pushes the support frame 42 to the cutting head, the third baffle 53, the second baffle 52, and the first baffle 51 on the support frame 42 are flipped in sequence, so that the first baffle 51, the second baffle 52, and the third baffle 53 block the front and sides of the cutting head, preventing personnel from accidentally touching the cutting head and being injured when the cutting head is stopped.

[0029] Furthermore, both the second baffle 52 and the third baffle 53 are fixed with fixing components; each fixing component includes two fixing seats 54, wherein the third baffle 53 has an opening, and the fixing component of the second baffle 52 is disposed in the opening to prevent the third baffle 53 from contacting the fixing component of the second baffle 52 when the third baffle 53 is stacked on the second baffle 52; the two fixing seats 54 are spaced apart and have pin holes coaxially arranged laterally, wherein the fixing seats 54 can be bushings; a pin 55 is provided in the pin hole; two locking components are fixed on the first baffle 51; the two locking components respectively cooperate with the two fixing seats 54 on the second baffle 52 and the third baffle 53; each locking component includes two locking seats. 56 and a rotating rod 57 are provided, with two locking seats 56 spaced apart and having shaft holes coaxially arranged laterally; the middle part of the rotating rod 57 is arc-shaped, and a bushing 58 that cooperates with two fixing seats 54 is fixed in the middle part of the rotating rod 57; the two ends of the rotating rod 57 are inserted into the two shaft holes. During the rotation of the rotating rod 57, the bushing 58 can be coaxial with the two pin holes, and the pin 55 is inserted into the two pin holes and the bushing 58, so that the second baffle 52 or the third baffle 53 is locked with the first baffle 51, thereby fixing the first baffle 51, the second baffle 52 and the third baffle 53 on the support frame 42, and preventing the first baffle 51, the second baffle 52 and the third baffle 53 from tilting and colliding during movement, causing damage.

[0030] Furthermore, the fixing component also includes a handle 541; the two ends of the handle 541 are respectively fixed on two fixing seats 54. After the pin 55 is removed, the handle 541 can be manually pulled to easily flip the second baffle 52 or the third baffle 53.

[0031] In this embodiment, a top plate 6 is fixed on the outermost guide rail 41 of the two guide rail 41 assemblies. When the hydraulic cylinder 2 retracts, the support frame 42 and the protective assembly are below the top plate 6, and the top plate 6 protects the protective assembly.

[0032] The method of using this utility model is as follows: When the tunneling machine is in a stopped state, start the hydraulic cylinder 2. The hydraulic cylinder 2 extends, and the telescopic frame 3 extends accordingly, pushing the support frame 42 to move. After the support frame 42 moves to the cutting head, first take out the pin 55 on the third baffle 53, pull the handle 541 of the third baffle 53 to flip the third baffle 53 to the side of the cutting head, then take out the pin 55 on the second baffle 52, pull the handle 541 of the second baffle 52 to flip the second baffle 52 to the other side of the cutting head, and finally flip the third baffle 53 to the front of the cutting head to protect the cutting head and prevent personnel from accidentally touching the cutting head and being injured.

Claims

1. A telescoping shield for a heading machine cutting head, characterized by, Including fixed frame (1), hydraulic cylinder (2), telescopic frame (3) and protection assembly, Both ends of the fixed frame (1) are symmetrically provided with guide rail assemblies; the guide rail assembly comprises a plurality of guide rails (41) arranged in parallel, the heights of the plurality of guide rails (41) gradually decrease from the outside to the inside of the two guide rail assemblies; the outermost guide rail (41) in the guide rail assembly is fixed on the fixed frame (1), and the other guide rails (41) are rotatably connected with at least one pulley (411) at one end of the outer side; the pulley (411) is slidably arranged in the adjacent guide rail (41), and a limiting plate (412) is fixed at the end of the guide rail (41) away from the pulley (411); the innermost guide rails (41) in the two guide rail assemblies are fixed with a support frame (42); the protection assembly is arranged on the support frame (42); One end of the telescopic frame (3) is hingedly connected with the fixed frame (1), and the other end is hingedly connected with the support frame (42); the hydraulic cylinder (2) is arranged on the fixed frame (1), and the piston rod of the hydraulic cylinder (2) is hingedly connected with the telescopic frame (3).

2. A retraction shield for a heading machine cutting head according to claim 1, characterised in that, The telescopic frame (3) comprises at least two telescopic assemblies hingedly connected in sequence, the telescopic assembly comprises two first connecting rods (31), the middle portions of the two first connecting rods (31) are rotatably connected through a first rotating shaft (311); the piston rod of the hydraulic cylinder (2) is rotatably connected with any one first rotating shaft (311); the two ends of at least two telescopic assemblies are respectively hingedly connected with two second connecting rods (32) and two third connecting rods (33); the ends of the two second connecting rods (32) away from the telescopic assembly are rotatably connected through a second rotating shaft (34); the lower side of the outermost guide rail (41) of the two guide rail assemblies is provided with a connecting frame (43); the second rotating shaft (34) is rotatably connected with the connecting frame (43); the ends of the two third connecting rods (33) away from the telescopic assembly are respectively rotatably connected with the support frame (42) through a third rotating shaft (35).

3. The retraction shield for a heading machine cutting head of claim 1, wherein, The protection assembly comprises a first baffle (51), a second baffle (52) and a third baffle (53), the first baffle (51) is connected with one side of the support frame (42) away from the fixed frame (1) through a hinge; the second baffle (52) and the third baffle (53) are respectively connected with the two sides of the support frame (42) or the innermost guide rails (41) of the two guide rail assemblies through hinges; the first baffle (51), the second baffle (52) and the third baffle (53) can be stacked on the support frame (42) in sequence.

4. A retraction shield for a heading machine cutting head according to claim 3, characterised in that, The second baffle (52) and the third baffle (53) are fixed with fixing assemblies; the fixing assembly comprises two fixing seats (54); the two fixing seats (54) are arranged at intervals and are coaxially provided with pin holes in the transverse direction; the pin holes are provided with pin shafts (55); the first baffle (51) is fixed with two locking components; the two locking components are matched with the two fixing seats (54) on the second baffle (52) and the third baffle (53) respectively; the locking component comprises two locking seats (56) and a rotating rod (57), the two locking seats (56) are arranged at intervals in the middle part of the rotating rod (57) and are coaxially provided with shaft holes in the transverse direction; the middle part of the rotating rod (57) is arc-shaped and is fixed with a shaft sleeve (58) matched with the two fixing seats (54); the two ends of the rotating rod (57) are inserted into the two shaft holes, and in the rotating process of the rotating rod, the shaft sleeve (58) can be coaxial with the two pin holes.

5. A retraction shield for a heading machine cutting head according to claim 4, characterised in that, The fixing assembly further comprises a handle (541); the two ends of the handle (541) are fixed on the two fixing seats (54) respectively.

6. The retraction shield for a heading machine cutting head of claim 1, wherein, The outermost guide rail (41) of the two guide rail assemblies is fixed with a top plate (6).

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