Coal mining machine roller positioning clamp

Abstract

The invention discloses a coal mining machine roller positioning clamp and relates to the field of clamps. The hydraulic positioning tool solves the problems that an existing hydraulic positioning tool for the roller of the coal mining machine is complex in structure and prone to impacting a roller body. A clamp base (1) is a cylindrical base, a power source is embedded in the lower portion in the clamp base (1), the rotary power output end of the power source is connected with a driving bevel gear (4), and a plurality of horizontal moving tensioning assemblies are evenly distributed in the circumferential direction and meshed with the driving bevel gear (4) at the same time. The driving bevel gear (4) drives the plurality of horizontal moving tensioning assemblies to move outwards at the same time until the barrel (20) is tensioned; each horizontal moving tensioning assembly is provided with an energy storage assembly, the energy output side of each energy storage assembly abuts against a tensioning piece of the corresponding horizontal moving tensioning assembly in a pressing mode, outward tensioning force is continuously provided for the tensioning piece, and then the barrel (20) is positioned and clamped. The device is used for positioning and clamping the roller of the coal mining machine.

Description

Technical Field

[0001] The invention relates to the technical field of clamps, and in particular to a coal mining machine drum positioning clamp, which is used for fixing a coal mining machine drum body, thereby facilitating tooth seat welding of the coal mining machine drum body. Background Art

[0002] At present, when welding the tooth seat of the drum of the coal mining machine in China, the traditional process is to fix the drum of the coal mining machine on the turning plane of the positioner by spot welding, and then weld the tooth seat of the coal mining machine drum to the drum body. After all the tooth seat welding is completed manually, the welding connection between the coal mining machine drum and the turning plane of the positioner is broken by external force. However, when breaking by external force, it is easy to damage the turning plane of the positioner and the drum, and the traditional process has low production efficiency.

[0003] In order to solve the above problems, people have designed various fixtures with different structures. Among them, the Chinese utility model announcement number is CN215787898U, and the patent name is the hydraulic positioning fixture for the coal mining machine drum. The patent points out that although the drum body is fixed by electric welding, in addition to the problem of easy damage to the drum body and the positioner during the forced demolition process, there is also the problem of inaccurate positioning. To this end, the patent uses three sets of manually operated valve groups or remote controls to achieve axial and radial positioning and fixation of the drum body. The operation is convenient and fast, and the efficiency can be increased by more than twice. Since the hydraulic cylinder has a large output, the positioning fixture can provide a greater clamping force. Therefore, the assembly structure composed of the positioning fixture and the drum body has a higher strength and can eliminate the risk of drum displacement. Since the cylinder operation is suitable for automation, the workload of manual operation can be significantly reduced.

[0004] In actual use, this tooling uses a total of three hydraulic cylinders. For axial fixation, a lifting cylinder is used to support the lower part of the cylinder in the axial direction, and a group of corner cylinders are used to press down the upper part of the cylinder in the axial direction to achieve clamping of the upper and lower ends of the cylinder. For radial fixation, the telescopic positioning cylinder tightens the inner wall of the cylinder when it is extended to achieve the effect of fixing the cylinder. Although the cylinder is fixed by the joint action of the axial and radial directions, it controls three sets of hydraulic cylinders respectively through three oil circuits, which not only has a complex structure, but also the hydraulic system is prone to impact during the clamping of the cylinder.

[0005] In summary, the existing hydraulic positioning tooling for the drum of a coal mining machine has the problems of complex structure and easy impact on the drum body. Summary of the invention

[0006] The purpose of the present invention is to solve the problems of complex structure and easy impact on the drum body of the existing hydraulic positioning tooling of the coal mining machine drum, and further provide a coal mining machine drum positioning fixture.

[0007] The technical solution of the present invention is:

[0008] A coal mining machine drum positioning clamp includes a clamp base, which also includes a power source, an active bevel gear, multiple horizontally movable tensioning components and multiple energy storage components. The clamp base is a cylindrical base, the power source is embedded in the lower part of the clamp base, the rotary power output end of the power source is connected to the active bevel gear, multiple horizontally movable tensioning components are evenly distributed in the circumferential direction and mesh with the active bevel gear at the same time, the active bevel gear drives multiple horizontally movable tensioning components to move outward at the same time until the cylinder is tightened; an energy storage component is installed on each horizontally movable tensioning component, the energy output side of the energy storage component is pressed against the tensioning part of the horizontally movable tensioning component, and continuously provides an outward expansion force for the tensioning part, thereby realizing the positioning and clamping of the cylinder.

[0009] Preferably, a plurality of long strip holes are formed on the outer circumferential side wall of the clamp base.

[0010] Furthermore, each horizontally movable tensioning assembly includes a driven end bevel gear, a screw rod, a screw nut, a screw nut seat, two end support assemblies and a tensioner. The screw rod is installed on the upper end of the fixture base through the two end support assemblies, the driven end bevel gear is installed on one end of the screw rod through a key, and the driven end bevel gear is meshed with the active bevel gear, the screw nut is installed on the screw rod, the screw nut seat is installed on the screw nut, the tensioner is installed on the screw nut seat, and the tensioner realizes horizontal movement of the tensioner as the screw nut installed on the screw rod and the screw nut seat move.

[0011] Furthermore, the two end support assemblies include two tapered roller bearings, two bearing seats and bearing end covers. The two bearing seats are installed in parallel on the upper end surface of the fixture base. Each bearing seat is embedded with a tapered roller bearing. The two ends of the screw rod are matched with the axial holes between the two tapered roller bearings, and the bearing end covers are installed at the ends of the screw rod and the bearing seats.

[0012] Furthermore, the tensioning member includes a tensioning seat and a cylinder tensioning block, the tensioning seat is mounted on the screw nut seat, and the cylinder tensioning block is mounted on the tensioning seat.

[0013] Preferably, the outer side surface of the cylinder tension block is an arc surface.

[0014] Furthermore, each energy storage assembly includes a clamping drive, a clamping drive element connecting block, a transmission pin, a rotating pin and a cylinder clamping arm. The clamping drive is installed on the tensioning seat, the clamping drive element connecting block is vertically installed on the clamping drive, the transmission pin is horizontally inserted in the clamping drive element connecting block, one end of the cylinder clamping arm is rotatably installed on the transmission pin, the rotating pin is rotatably inserted in the middle of the cylinder clamping arm, one end of the cylinder clamping arm rises when the clamping drive is extended, the other end of the cylinder clamping arm descends around the rotating pin and abuts against the cylinder tensioning block, and the clamping drive stores energy under the action of the power source and transfers the energy to the cylinder tensioning block, and vice versa.

[0015] Furthermore, the energy storage assembly also includes two mounting plates, which are relatively vertically mounted on the tensioning seat, and the two mounting plates are provided with vertical long strip holes, and the transmission pin shaft is rotatably mounted in the two long strip holes.

[0016] Preferably, the power source is a hydraulic motor or an electric motor.

[0017] Preferably, the pressing drive member is a hydraulic cylinder or a pneumatic cylinder.

[0018] Compared with the prior art, the present invention has the following effects:

[0019] 1. The present invention realizes the positioning of the cylinder by fixing the lower end surface of the clamp base 1 on the rotary platform of the positioner. Figure 1 It can be seen that the fixture base 1 and the rotary platform are detachably connected by bolts, so that the positioning fixture of the present invention is easy to disassemble and assemble.

[0020] 2. The present invention achieves the clamping of the cylinder by: first, driven by a power source, the active bevel gear is driven to rotate, and the active bevel gear is meshed with a plurality of driven end bevel gears at the same time. The driven end bevel gear drives the screw rod matched with it to rotate, and drives the screw nut to move horizontally on the screw rod. At the same time, the screw nut seat on the screw nut and the cylinder tensioning block on the tensioning seat move together. When the cylinder tensioning block moves outward, it contacts the inner wall of the cylinder. The pressure transmission sensor is used to determine whether it contacts the inner wall of the cylinder, thereby completing the direct clamping of the cylinder in the radial direction. Secondly, in order to strengthen the clamping in the radial direction, the present invention adopts a method of energy storage reinforcement after radial clamping to cooperate with clamping. The specific reinforcement method is: through the clamping drive rising, the clamping drive drives the end of the clamping drive connecting block to descend around the rotating pin shaft, and the end of the clamping drive connecting block is just clamped at the upper oblique side of the inner side of the clamping drive connecting block after it descends, and the clamping drive connecting block accumulates energy under the action of the energy accumulator in the hydraulic station. Even when the cylinder tensioning block is turned over, or the stress generated during welding causes the cylinder to deform, resulting in insufficient tension between the cylinder tensioning block and the inner wall of the cylinder, the clamping drive connecting block can provide external force reinforcement in time to ensure the stability and firmness of the cylinder clamping.

[0021] Therefore, the cylinder of the present invention adopts a combination of active tension and reinforcement tension to achieve the clamping of the cylinder. Compared with the prior art, this clamping method has a simple structure and omits two sets of hydraulic components, especially the corner cylinder and the telescopic positioning cylinder. After omitting the above two cylinders, the impact of the cylinder clamping at the same time during the hydraulic start and stop process is effectively reduced.

[0022] 3. When the present invention realizes radial clamping of the inner wall of the cylinder, it does not use a hydraulic cylinder to clamp the inner wall, but uses a horizontal moving tensioning assembly to realize it. The horizontal moving tensioning assembly uses the nut-screw pair in the mechanical field to drive the cylinder tensioning block to move to realize tensioning. This tensioning method can not only accurately calculate the distance moved by the cylinder tensioning block in advance, but also can accurately determine it through the pressure sensor located on the cylinder tensioning block. This radial clamping method avoids the problem that the telescopic cylinder in the prior art cannot guarantee its telescopic amount, causing damage to the cylinder, or that it needs to be debugged many times before it can achieve a firm clamping of the cylinder.

[0023] 4. The present invention adopts a power source to drive the horizontally movable tensioning assembly, and under the action of the mutual meshing of the driving gear and the driven gear, it can drive four lead screws to rotate at the same time, each lead screw is provided with a lead screw nut, and the lead screw nut drives the tensioning seat to move outward, thereby tensioning the roller, and the tensioning seat not only plays the tensioning role, but also has the function of centering and positioning the roller; in addition, the present invention also drives the cylinder body clamping arm to clamp the cylinder body through a hydraulic cylinder or a pneumatic cylinder, and the inner side wall of the cylinder body is tensioned by the tensioning seat (a shoulder is provided on the upper part of the inner side wall of the cylinder body, and the tensioning seat is clamped on the shoulder to prevent axial displacement under the action of the holding force of the cylinder body clamping arm) and the pressing installation of the cylinder body clamping arm, thereby jointly realizing the positioning of the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 yes Figure 1 A top view of

[0026] Figure 3 is a main cross-sectional view of the present invention;

[0027] Figure 4 It is a schematic diagram of the overall structure of the present invention when it is matched with a cylinder.

[0028] Among them: 1. fixture base, 1-1, long strip hole, 4. driving bevel gear, 5. driven end bevel gear, 6. lead screw, 7. lead screw nut, 8. lead screw nut seat, 9. tensioning seat, 10. cylinder tensioning block, 11. clamping drive member, 12. clamping drive element connecting block 12, 13. transmission pin shaft, 14. rotating pin shaft, 15. cylinder clamping arm, 16. fixture upper plate, 17. wear-resistant sheet, 18. tapered roller bearing, 19. hydraulic motor mounting plate, 20. cylinder, 21. bearing seat, 22. bearing end cover, 23. mounting plate. DETAILED DESCRIPTION

[0029] Specific implementation method 1: Combination Figures 1 to 3 The present embodiment is described. The present embodiment includes a clamp base 1, which also includes a power source, an active bevel gear 4, a plurality of horizontally movable tensioning assemblies and a plurality of energy storage assemblies. The clamp base 1 is a cylindrical base. The power source is embedded in the lower part of the clamp base 1. The rotary power output end of the power source is connected to the active bevel gear 4. The plurality of horizontally movable tensioning assemblies are evenly distributed in the circumferential direction and mesh with the active bevel gear 4 at the same time. The active bevel gear 4 drives the plurality of horizontally movable tensioning assemblies to move outward at the same time until the cylinder 20 is tightened. An energy storage assembly is installed on each horizontally movable tensioning assembly. The energy output side of the energy storage assembly is pressed against the tensioning member of the horizontally movable tensioning assembly and continuously provides an outward expansion force to the tensioning member, thereby realizing the positioning and clamping of the cylinder 20.

[0030] The present invention changes the traditional spot welding process, so it will not cause damage to the coal mining machine drum body and the positioner rotary platform; in addition, the present invention realizes the positioning and clamping of the coal mining machine drum body through mechanical structure and PLC control, and its repeated positioning error is small, the positioning is precise, and it is easy to realize robot automated production, save labor costs, and improve production efficiency.

[0031] The positioning fixture of the present invention is applied to the intelligent welding production line of the coal mining machine drum. The intelligent production line of the coal mining machine drum also includes a flip positioner and a transfer trolley. The hydraulic positioning fixture is fixed on the rotating platform of the positioner, and the hydraulic positioning fixture is coaxial with the rotation center of the flip positioner.

[0032] Specific implementation method 2: Combination Figures 1 to 3 To describe this embodiment, a plurality of long strip holes 1 - 1 are provided on the outer circumferential side wall of the clamp base 1 of this embodiment.

[0033] Such arrangement is convenient for reducing the weight of the entire positioning fixture, and also enables timely observation of the operation inside the fixture base 1. Other components and connection relationships are the same as those of the first specific embodiment.

[0034] Specific implementation method three: Combination Figure 3 To illustrate this embodiment, each horizontally movable tensioning assembly of this embodiment includes a driven end bevel gear 5, a screw rod 6, a screw nut 7, a screw nut seat 8, two end support assemblies and a tensioner. The screw rod 6 is installed on the upper end of the fixture base 1 through the two end support assemblies, the driven end bevel gear 5 is installed on one end of the screw rod 6 through a key, and the driven end bevel gear 5 is meshed with the active bevel gear 4, the screw nut 7 is installed on the screw rod 6, the screw nut seat 8 is installed on the screw nut 7, the tensioner is installed on the screw nut seat 8, and the tensioner realizes horizontal movement of the tensioner as the screw nut 7 installed on the screw rod 6 and the screw nut seat 8 move.

[0035] In this arrangement, the driving end bevel gear 4 meshes with the four driven end bevel gears 5 at the same time, thereby driving the four lead screws 6 to rotate at the same time, thereby driving the tensioning seat 9 to move forward and backward at the same time, so as to quickly and accurately achieve the tensioning of the cylinder. The other components and connection relationships are the same as those of the specific implementation method one or two.

[0036] Specific implementation method four: Combination Figure 3 To describe this embodiment, the two end support components of this embodiment include two tapered roller bearings 18, two bearing seats 21 and bearing end covers 22. The two bearing seats 21 are installed in parallel on the upper end surface of the fixture base 1. Each bearing seat 21 is embedded with a tapered roller bearing 18. The two ends of the screw rod 6 are matched with the axial holes between the two tapered roller bearings 18, and the bearing end covers 22 are installed at the ends of the screw rod 6 and the bearing seats 21.

[0037] Such arrangement facilitates the smooth rotation of both ends of the screw rod 6. Other components and connection relationships are the same as any one of the specific implementation modes 1 to 3.

[0038] Specific implementation method five: Combination Figure 3 This embodiment is described. The tensioning member of this embodiment includes a tensioning seat 9 and a cylinder tensioning block 10. The tensioning seat 9 is mounted on the screw nut seat 8, and the cylinder tensioning block 10 is mounted on the tensioning seat 9. In this way, the cylinder tensioning block 10 directly contacts the inner wall of the cylinder to achieve tensioning of the cylinder. Other components and connection relationships are the same as any one of the specific embodiments 1 to 4.

[0039] Specific implementation method six: Combination Figure 3 To explain this embodiment, the outer side surface of the cylinder tension block 10 of this embodiment is an arc surface. This arrangement facilitates a large contact area with the inner side wall of the cylinder to ensure the supporting effect. The other components and connection relationships are the same as any one of the specific embodiments 1 to 5.

[0040] Specific implementation method seven: Combination Figure 3 To illustrate this embodiment, each energy storage component of this embodiment includes a clamping drive 11, a clamping drive element connecting block 12, a transmission pin 13, a rotating pin 14 and a cylinder clamping arm 15. The clamping drive 11 is installed on the tensioning seat 9, the clamping drive element connecting block 12 is vertically installed on the clamping drive 11, the transmission pin 13 is horizontally inserted on the clamping drive element connecting block 12, one end of the cylinder clamping arm 15 is rotatably installed on the transmission pin 13, and the rotating pin 14 is rotatably inserted in the middle of the cylinder clamping arm 15. One end of the cylinder clamping arm 15 rises when the clamping drive 11 is extended, and the other end of the cylinder clamping arm 15 descends around the rotating pin 14 and abuts against the cylinder tensioning block 10, and the clamping drive 11 stores energy under the action of the power source and transfers the energy to the cylinder tensioning block 10, and vice versa.

[0041] In this way, the inlet of the pressing drive member 11 in this embodiment is connected with an explosion-proof valve. Compared with the traditional one-way throttle valve, the explosion-proof valve will be quickly cut off when the hydraulic pipeline suddenly bursts to prevent accidents. Other components and connection relationships are the same as any one of the specific embodiments 1 to 6.

[0042] This embodiment also includes a fixture upper plate 16 and a wear-resistant sheet 17. The fixture upper plate 16 is installed at the lower end of the cylinder tension block 10, and the wear-resistant sheet 17 is installed at the lower end of the tension seat 9. This is convenient for ensuring the smooth movement of the entire tensioner.

[0043] Specific implementation method eight: Combination Figure 3To explain this embodiment, the energy storage assembly of this embodiment also includes two mounting plates 23, which are relatively vertically mounted on the tensioning seat 9, and the two mounting plates 23 are provided with vertical elongated holes, and the transmission pin 13 is rotatably mounted in the two elongated holes. This arrangement facilitates the support of the transmission pin 13, and the transmission pin 13 can move up and down and rotate in the elongated holes. The other components and connection relationships are the same as any one of the specific embodiments one to seven.

[0044] Specific implementation method nine: Combination Figures 1 to 3 To explain this embodiment, the power source of this embodiment is a hydraulic motor or an electric motor. Other components and connection relationships are the same as any one of the specific embodiments 1 to 8.

[0045] The four driven end bevel gears of this embodiment are respectively connected to the four screws, and the screw nut seats convert the rotational motion of the screws into the linear motion of the four tensioning seats through the four screw nuts. The hydraulic cylinders are respectively fixed on the four tensioning seats, and the initial state of the hydraulic cylinder piston rods is the retracted state. The cylinder tensioning blocks are respectively fixed on the sides of the four tensioning seats. The clamping drive connecting blocks are respectively fixed on the free ends of the four clamping drive piston rods, and are respectively connected to the four cylinder clamping blocks through transmission pins. The rotating pins provide rotation fulcrums for the four cylinder clamping blocks. The upper plate of the clamp is installed on the base of the clamp. The wear-resistant plates are respectively fixed on the bottom of the four tensioning seats to separate the tensioning seats from the base of the clamp.

[0046] Specific implementation method ten: Combination Figures 1 to 3 To explain this embodiment, the pressing driving member 11 of this embodiment is a hydraulic cylinder or a pneumatic cylinder. Other components and connection relationships are the same as any one of the specific embodiments 1 to 9.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coal mining machine drum positioning fixture, comprising a fixture base (1), characterized in that: It also includes a power source, a driving bevel gear (4), a plurality of horizontally movable tensioning components and a plurality of energy storage components. The fixture base (1) is a cylindrical base, the power source is embedded in the lower part of the fixture base (1), the rotary power output end of the power source is connected to the active bevel gear (4), a plurality of horizontally movable tensioning components are evenly distributed in the circumferential direction and mesh with the active bevel gear (4) at the same time, and the active bevel gear (4) drives the plurality of horizontally movable tensioning components to move outward at the same time until the cylinder (20) is tightened; An energy storage component is installed on each horizontally movable tensioning component. The energy output side of the energy storage component presses against the tensioning member of the horizontally movable tensioning component and continuously provides an outward expansion force for the tensioning member, thereby achieving positioning and clamping of the cylinder (20).

2. A coal mining machine drum positioning fixture according to claim 1, characterized in that: A plurality of long strip holes (1-1) are provided on the outer circumferential side wall of the clamp base (1).

3. A coal mining machine drum positioning fixture according to claim 2, characterized in that: Each horizontal moving tensioning assembly comprises a driven end bevel gear (5), a lead screw (6), a lead screw nut (7), a lead screw nut seat (8), two end support assemblies and a tensioning member. The lead screw (6) is mounted on the upper end of the fixture base (1) through two end support assemblies, the driven end bevel gear (5) is mounted on one end of the lead screw (6) through a key, and the driven end bevel gear (5) is meshed with the driving bevel gear (4), the lead screw nut (7) is mounted on the lead screw (6), the lead screw nut seat (8) is mounted on the lead screw nut (7), the tensioner is mounted on the lead screw nut seat (8), and the tensioner realizes horizontal movement of the tensioner along with the movement of the lead screw nut (7) mounted on the lead screw (6) and the lead screw nut seat (8).

4. A coal mining machine drum positioning fixture according to claim 3, characterized in that: The two end support components include two tapered roller bearings (18), two bearing seats (21) and bearing end covers (22). The two bearing seats (21) are installed in parallel on the upper end surface of the fixture base (1). Each bearing seat (21) is embedded with a tapered roller bearing (18). The two ends of the screw rod (6) are matched with the axial holes between the two tapered roller bearings (18). The bearing end covers (22) are installed on the ends of the screw rod (6) and the bearing seats (21).

5. A coal mining machine drum positioning fixture according to claim 4, characterized in that: The tensioning member comprises a tensioning seat (9) and a cylinder tensioning block (10); the tensioning seat (9) is mounted on the screw nut seat (8), and the cylinder tensioning block (10) is mounted on the tensioning seat (9).

6. A coal mining machine drum positioning fixture according to claim 5, characterized in that: The outer side surface of the cylinder tensioning block (10) is an arc surface.

7. A coal mining machine drum positioning fixture according to claim 1 or 6, characterized in that: Each energy storage assembly comprises a pressing drive member (11), a pressing drive element connecting block (12), a transmission pin shaft (13), a rotating pin shaft (14) and a cylinder pressing arm (15). The clamping drive (11) is mounted on the tensioning seat (9), the clamping drive element connecting block (12) is vertically mounted on the clamping drive (11), the transmission pin (13) is horizontally inserted on the clamping drive element connecting block (12), one end of the cylinder clamping arm (15) is rotatably mounted on the transmission pin (13), the rotating pin (14) is rotatably inserted in the middle of the cylinder clamping arm (15), one end of the cylinder clamping arm (15) rises when the clamping drive (11) is extended, the other end of the cylinder clamping arm (15) descends around the rotating pin (14) and is abutted against the cylinder tensioning block (10), and the clamping drive (11) stores energy under the action of the hydraulic system and transmits the energy to the cylinder tensioning block (10), and vice versa.

8. A coal mining machine drum positioning fixture according to claim 7, characterized in that: The energy storage assembly also includes two mounting plates (23), which are relatively vertically mounted on the tensioning seat (9), and the two mounting plates (23) are provided with vertical long strip holes, and the transmission pin shaft (13) is rotatably mounted in the two long strip holes.

9. A coal mining machine drum positioning fixture according to claim 1 or 8, characterized in that: The power source is a hydraulic motor or an electric motor.

10. A coal mining machine drum positioning fixture according to claim 9, characterized in that: The pressing driving member (11) is a hydraulic cylinder or a pneumatic cylinder.

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