Jaw wear-free driving structure of aluminum alloy plate tension stretcher

Abstract

A jaw abrasion-free driving structure of an aluminum alloy plate tension stretcher is characterized in that jaw combinations and jaw driving devices which are arranged in groups are fixedly arranged on the lower portion of an upper beam and the upper portion of a lower beam of a fixed end machine head or a stretching end machine head in a symmetrical and inclined mode, and the jaw assemblies and the jaw driving devices in the same group are arranged at the same inclination angle. Relative sliding friction existing when the driving ejector rod drives the jaw sliding block to move is eliminated, so that the service life of the driving ejector rod and the jaw sliding block is prolonged, the replacement and maintenance frequency of the driving ejector rod and the jaw sliding block is reduced, and the use and maintenance cost of the aluminum alloy plate tension stretcher is reduced. Meanwhile, the weight of the jaw driving device which is vertically separated is reduced, and the problem that the jaw driving device is difficult to disassemble and maintain is correspondingly solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the aviation level aluminum alloy plate stress treatment equipment, concretely relates to an aluminum alloy plate tension stretcher jaw no-abrasion drive structure. BACKGROUND

[0002] Aluminum alloy thick plate produces big residual stress in the production procedure such as rolling, quenching, and too big residual stress can lead to deformation in the material processing process, and even scrap. Aviation level aluminum alloy plate needs to adopt pre-stretching procedure to reduce the residual stress of the plate in the production process, and the tension stretcher is the major key equipment to complete the procedure.

[0003] The utility model discloses a pre-jaw drive device of fixed end head or stretching end head of tension stretcher, is used for driving fixed end head or stretching end head upper and lower jaw sliding block movement, and it adopts synchronous hydraulic cylinder and secondary clamping cylinder sequential drive structure, but the drive structure has two problems: 1, in the driving jaw sliding block movement process, the drive top rod is horizontal movement, and the jaw sliding block is oblique movement, so there is relative sliding friction between the drive top rod and the jaw sliding block contact surface, and the driving force of the drive top rod to push the jaw sliding block movement is very big, leading to the existence of serious abrasion between the drive top rod and the jaw sliding block contact surface, thereby shortening the service life of the drive top rod and the jaw sliding block, increasing the replacement and maintenance frequency of the drive top rod and the jaw sliding block, and increasing the use and maintenance cost of the aluminum alloy plate tension stretcher; 2, synchronous clamping cylinder and secondary clamping cylinder are fixed connection structure, so the overall weight of the pre-jaw drive device is too big, leading to extremely difficult disassembly and maintenance, so the existing tension stretcher jaw drive structure needs to be improved. UTILITY MODEL CONTENTS

[0004] In order to overcome the deficiency in the background art, the utility model discloses an aluminum alloy plate tension stretcher jaw no-abrasion drive structure, adopts the jaw combination of group setting, jaw drive device, and is fixedly arranged in the upper beam lower part and the lower beam upper part of the fixed end head or the stretching end head in the symmetrical inclined mode, through the same inclination angle of the same group jaw combination, jaw drive device setting, the relative sliding friction existing when the drive top rod drives the jaw sliding block movement is eliminated, and the overall weight of the upper and lower separated jaw drive device is reduced, and the difficult disassembly and maintenance problem is improved.

[0005] To achieve the aforementioned objective, this utility model adopts the following technical solution: a wear-free jaw drive structure for an aluminum alloy sheet tension stretching machine, used to drive the jaws of the fixed end head or the stretching end head of the aluminum alloy sheet tension stretching machine to close or open; comprising a set of jaw assemblies and jaw drive devices; the set of jaw assemblies and jaw drive devices are symmetrically and inclinedly fixedly arranged on the lower part of the upper beam and the upper part of the lower beam of the fixed end head or the stretching end head; the jaw assemblies and jaw drive devices in the same group have the same inclination angle, which is used to eliminate the relative sliding friction between the jaw slider and the drive rod in the jaw drive device when the drive rod drives the jaw slider in the jaw assembly to move.

[0006] Furthermore, the jaw assembly includes a jaw base plate, a jaw guide rail, and a jaw slider. The jaw guide rail is elastically connected to the jaw base plate, and the jaw slider is slidably connected to the jaw guide rail. The jaw assembly is fixedly mounted on the lower part of the upper beam and the upper part of the lower beam via the jaw base plate.

[0007] Furthermore, the jaw driving device includes a jaw driving device base and a jaw driving assembly; the jaw driving assembly includes a driving cylinder, a driving piston rod, and a driving push rod, the driving piston rod is movably disposed in the driving cylinder, and the driving push rod is hinged to the outer end of the driving piston rod; the jaw driving assembly is fixedly connected to the driving device base through the driving cylinder; the jaw driving device is fixedly disposed on the lower part of the upper beam and the upper part of the lower beam through the jaw driving device base; when the driving piston rod moves outward, it causes the driving push rod to abut against the jaw slider, driving the jaw slider to move along the jaw guide rail.

[0008] Furthermore, the jaw drive device base is provided with a drive push rod hole, and the drive push rod is slidably disposed in the drive push rod hole.

[0009] Furthermore, the jaw drive device also includes a jaw unloading assembly; the jaw unloading assembly includes an unloading cylinder, an unloading piston rod, and an unloading wire rope, with hinge joints fixedly installed at both ends of the unloading wire rope; the unloading piston rod is movably installed in the unloading cylinder; one end of the unloading wire rope is hinged to the outer end of the unloading piston rod through the hinge joint, and the other end is hinged to the jaw slider of the jaw assembly through the hinge joint.

[0010] Furthermore, the jaw slider is also fixedly equipped with a jaw plate.

[0011] Due to the adoption of the above-described technical solution, this utility model has the following beneficial effects: The wear-free jaw drive structure of the aluminum alloy sheet tension stretching machine disclosed in this utility model adopts a set of jaw assemblies and jaw drive devices, which are symmetrically and inclinedly fixed on the lower part of the upper beam and the upper part of the lower beam of the fixed end machine head or the stretching end machine head. By setting the same inclination angle for the same set of jaw assemblies and jaw drive devices, the relative sliding friction that exists when the drive rod drives the jaw slider is eliminated, thereby improving the service life of the drive rod and jaw slider, reducing the replacement and maintenance frequency of the drive rod and jaw slider, and reducing the use and maintenance cost of the aluminum alloy sheet tension stretching machine; at the same time, the overall weight of the upper and lower separated jaw drive devices is also reduced, which correspondingly improves the problem of difficult disassembly and maintenance. Attached Figure Description

[0012] Figure 1 A schematic diagram of the structure and appearance of a group of jaws assembly and jaw drive device;

[0013] Figure 2 A schematic diagram showing the implementation of a wear-free jaw drive structure on the fixed end of the machine head for an aluminum alloy sheet tension stretching machine.

[0014] Figure 3 An exploded view of the structure of the wear-free drive structure of the jaws of an aluminum alloy sheet tension stretching machine implemented on the fixed end of the machine head.

[0015] Figure 4 A schematic diagram of the upper beam when the wear-free drive structure of the jaws of the tension stretching machine for aluminum alloy sheets is implemented on the fixed end of the machine head.

[0016] Figure 5 A schematic diagram of the lower beam when the wear-free drive structure of the jaws of an aluminum alloy sheet tension stretching machine is implemented on the fixed end of the machine head.

[0017] Figure 6 Schematic diagram of the jaw assembly Figure 1 ;

[0018] Figure 7 Schematic diagram of the jaw assembly Figure 2 ;

[0019] Figure 8 This is a schematic diagram of the jaw base plate.

[0020] Figure 9 This is a schematic diagram of the jaw guide rail.

[0021] Figure 10 Schematic diagram of the jaw slider Figure 1 ;

[0022] Figure 11 Schematic diagram of the jaw slider Figure 2 ;

[0023] Figure 12 Schematic diagram of the jaw slider Figure 3 ;

[0024] Figure 13 This is a schematic diagram of the cross-sectional structure of the jaw assembly;

[0025] Figure 14 A schematic diagram of the jaw drive device;

[0026] Figure 15 This is a schematic diagram of the base of the jaw drive device.

[0027] Figure 16 This is a schematic diagram of the jaw drive assembly.

[0028] Figure 17 This is a schematic diagram of the jaw unloading component.

[0029] Figure 18 This is a schematic diagram of the cross-sectional structure of the jaw drive device;

[0030] Figure 19 A schematic diagram of the cross-sectional structure of the wear-free drive structure for the jaws of an aluminum alloy sheet tension stretching machine when implemented on the fixed end of the machine head;

[0031] Figure 20 This is a partial enlarged schematic diagram (A) of the cross-sectional structure of the wear-free drive structure of the jaws of an aluminum alloy sheet tension stretching machine when implemented on the fixed end of the machine head.

[0032] In the diagram: 1. Upper beam; 1.4. Mounting surface of the upper beam jaw assembly; 1.5. Mounting surface of the upper beam jaw drive device; 2. Lower beam; 2.4. Mounting surface of the lower beam jaw assembly; 2.5. Mounting surface of the lower beam jaw drive device; 2.6. Mounting surface of the walking device; 3. Material feed groove; 5. Preload screw; 6. Preload nut; 8. Jaw assembly; 8.1. Jaw base plate; 8.1.1. Jaw guide rail fixing groove; 8.2. Jaw guide rail; 8.3. Jaw slider; 8.3.1. Jaw guide rail sliding groove; 8.3.2. Unloading wire rope mounting groove; 8.3.3. Unloading wire rope connecting hole; 8.3.4. Jaw jaw plate groove; 8.3.5. Jaw jaw plate wedge groove. 8.3.6 Oil injection hole; 8.4 Jaw jaws; 8.5 Jaw jaws wedge; 8.6 Square head nut; 8.7 Butterfly spring; 9. Jaw drive device; 9.1 Jaw drive device base; 9.1.1 Drive rod guide seat; 9.1.1.1 Drive push rod hole; 9.1.2 Drive cylinder fixing seat; 9.1.2.1 Reinforcing plate; 9.2 Jaw drive assembly; 9.2.1 Drive cylinder; 9.2.2 Drive piston rod; 9.2.3 Drive push rod; 9.3 Jaw unloading assembly; 9.3.1 Unloading cylinder; 9.3.2 Unloading piston rod; 9.3.3 Unloading wire rope; 9.4 Push rod guide sleeve. Detailed Implementation

[0033] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0034] A wear-free driving structure for the jaws of an aluminum alloy sheet tension stretching machine is used to drive the jaws of the fixed end head or the stretching end head of the aluminum alloy sheet tension stretching machine to close or open.

[0035] See the instruction manual appendix Figure 1 , 2 3: The wear-free drive structure of the jaws of the aluminum alloy sheet tension stretching machine includes a set of jaw assemblies 8 and jaw drive devices 9. The set of jaw assemblies 8 and jaw drive devices 9 are symmetrically and inclinedly fixed on the lower part of the upper beam 1 and the upper part of the lower beam 2 of the fixed end machine head or the stretching end machine head. The jaw assemblies 8 and jaw drive devices 9 in the same set have the same inclination angle to eliminate the relative sliding friction that exists when the drive rod 9.2.3 drives the jaw slider 8.3 to move.

[0036] See the instruction manual appendix Figure 4 , 5To ensure that the jaw assembly 8 and jaw drive device 9 are symmetrically and inclinedly fixed to the lower part of the upper beam 1 and the upper part of the lower beam 2, the lower part of the upper beam 1 is provided with an upper beam jaw assembly mounting surface 1.4 and an upper beam jaw drive device mounting surface 1.5 with the same inclination angle, and the upper part of the lower beam 2 is provided with a lower beam jaw assembly mounting surface 2.4 and a lower beam jaw drive device mounting surface 2.5 with the same inclination angle. The jaw assembly 8 and jaw drive device 9 are correspondingly fixedly mounted on the upper beam jaw assembly mounting surface 1.4. The upper beam jaw drive device mounting surface 1.5, or correspondingly fixedly mounted on the lower beam jaw assembly mounting surface 2.4 and the lower beam jaw drive device mounting surface 2.5; the upper beam 1 and the lower beam 2 are fixedly connected by pre-tightening screws 5 and pre-tightening nuts 6 to form a fixed end machine head or a stretching end machine head; a material passage trough 3 is formed between the upper beam jaw assembly mounting surface 1.4 and the upper beam jaw drive device mounting surface 1.5, and between the lower beam jaw assembly mounting surface 2.4 and the lower beam jaw drive device mounting surface 2.5;

[0037] See the instruction manual appendix Figure 6 , 7 The jaw assembly 8 includes a jaw base plate 8.1, a jaw guide rail 8.2, a jaw slider 8.3, a jaw jaw plate 8.4, and jaw jaw plate wedges 8.5; see the instruction manual appendix. Figure 8 The jaw base plate 8.1 is rectangular, with several jaw guide rail fixing grooves 8.1.1 arranged in an array on one side of the plate. Jaw guide rail fixing holes are evenly distributed at the bottom of each jaw guide rail fixing groove 8.1.1, and these holes are stepped holes. (See attached instruction manual.) Figure 9 The jaw guide rail 8.2 is a dovetail guide rail, and jaw guide rail holes are arrayed on the jaw guide rail 8.2; the jaw guide rail 8.2 and the jaw base plate 8.1 are elastically connected, and the specific connection structure is shown in the appendix of the instruction manual. Figure 13 The jaw guide rail 8.2 is set in the jaw guide rail fixing groove 8.1.1 of the jaw base plate 8.1 and is connected to the square head nut 8.6 by connecting bolts. Several sets of butterfly spring plates 8.7 are set in the stepped hole of the jaw guide rail fixing hole 8.1.2. The square head nut 8.6 applies a preload to the butterfly spring plates 8.7, thereby achieving an elastic connection between the jaw guide rail 8.2 and the jaw base plate 8.1. The reason for adopting an elastic connection between the jaw guide rail 8.2 and the jaw base plate 8.1 is to solve the problem of fixing the head or stretching end. In the event of a belt breakage accident (the aluminum alloy sheet is pulled apart) during operation of the machine head, to prevent the jaw assembly 8 from experiencing a huge impact that could cause the connecting bolts between the jaw assembly 8 and the upper beam 1 or lower beam 2, or the connecting bolts between the jaw guide rail 8.2 and the jaw base plate 8.1 to break, the square head nut 8.6 is used because it engages with the square head nut hole provided on the mounting surface 1.5 of the upper beam jaw drive device or the mounting surface 2.5 of the lower beam jaw drive device to prevent it from loosening during operation.

[0038] See the instruction manual appendix Figure 10 ,11 12: The jaw slider 8.3 is wedge-shaped, with a jaw slider sliding surface and a jaw plate mounting surface. The jaw slider sliding surface has a jaw guide rail groove 8.3.1, and the jaw plate mounting surface has a jaw plate groove 8.3.4 and a jaw plate wedge groove 8.3.5. The jaw slider 8.3 is slidably connected to the jaw guide rail 8.2 through the jaw guide rail groove 8.3.1. The jaw plate 8.4 is set in the jaw plate groove 8.3.4 and is fixed in the jaw plate groove 8.3.4 by the jaw plate wedge 8.5, which is fixedly connected to the jaw slider 8.3 by bolts. The bottom of the jaw guide rail groove 8.3.1 at the wedge-shaped large end of the jaw slider 8.3 also has an unloading wire rope connecting groove 8.3.2. 8.3.2 Through-holes 8.3.3 are provided on both side walls for connecting unloading wire ropes 9.3.3; the wedge-shaped small end of the jaw slider 8.3 is provided with an oil injection hole 8.3.6, which connects to the lubricating oil channel inside the jaw slider 8.3. The sliding surface of the jaw slider and the contact surface of the jaw guide rail groove 8.3.1 with the jaw guide rail 8.2 are provided with lubricating oil grooves, which are connected to the lubricating oil channel inside the jaw slider 8.3. When the fixed end machine head is maintained, grease is injected through the grease injection nozzle provided at the oil injection hole 8.3.6. The grease is injected into the lubricating oil groove of the sliding surface of the jaw slider and the jaw guide rail groove 8.3.1 through the lubricating oil channel, reducing the friction between the sliding working surfaces, extending the service life of the fixed end machine head, and reducing its maintenance workload;

[0039] See the instruction manual appendix Figure 19 , 20 The jaw assembly 8 is fixedly mounted on the upper beam jaw assembly mounting surface 1.4 of the upper beam 1 or the lower beam jaw assembly mounting surface 2.4 of the lower beam 2 by bolts via the jaw base plate 8.1; the square head nut 8.6 is provided in the square head nut hole of the upper beam jaw assembly mounting surface 1.4 or the lower beam jaw assembly mounting surface 2.4.

[0040] See the instruction manual appendix Figure 14 The jaw drive device 9 includes a jaw drive device base 9.1, a jaw drive assembly 9.2, and a jaw unloading assembly 9.3; see the appendix of the instruction manual. Figure 15 The jaw drive device base 9.1 includes a drive rod guide seat 9.1.1 and a drive cylinder fixing seat 9.1.2. The drive rod guide seat 9.1.1 is a rectangular thick plate with several through drive rod holes 9.1.1.1 arranged in a front-to-back array. The drive cylinder fixing seat 9.1.2 is a rectangular frame with several reinforcing plates 9.1.2.1 in the middle. The drive rod guide seat 9.1.1 and the drive cylinder fixing seat 9.1.2 are fixedly connected by welding or bolts. See the appendix of the instruction manual. Figure 16The jaw drive assembly 9.2 includes a drive cylinder 9.2.1, a drive piston rod 9.2.2, and a drive push rod 9.2.3. The drive piston rod 9.2.2 is movably disposed within the drive cylinder 9.2.1, and the drive push rod 9.2.3 is hinged to the outer end of the drive piston rod 9.2.2. (See attached instruction manual.) Figure 17 The jaw unloading assembly 9.3 includes an unloading cylinder 9.3.1, an unloading piston rod 9.3.2, and an unloading wire rope 9.3.3. The unloading piston rod 9.3.2 is movably disposed within the unloading cylinder 9.3.1. The unloading wire rope 9.3.3 has hinged joints fixed at both ends, and one end of the unloading wire rope 9.3.3 is hingedly connected to the outer end of the unloading piston rod 9.3.2. (See attached instruction manual.) Figure 18 The drive cylinder 9.2.1 and unloading cylinder 9.3.1 are fixedly mounted on the outer end of the drive cylinder mounting base 9.1.2 by bolts. The drive push rod 9.2.3 is slidably mounted in the drive push rod hole 9.1.1.1 of the drive rod guide seat 9.1.1. Both ends of the drive push rod hole 9.1.1.1 are fixedly mounted with push rod guide sleeves 9.4. The inner side of the push rod guide sleeve 9.4 is provided with a lubricating oil groove, which is connected to the oil injection hole in the drive rod guide seat 9.1.1. The outer end of the oil injection hole of the drive rod guide seat 9.1.1 is provided with an oil injection nozzle. Lubricating grease is injected into the lubricating oil groove of the push rod guide sleeve 9.4 through the oil injection nozzle, which reduces the active wear between the drive push rod 9.2.3 and the push rod guide sleeve 9.4, extends the service life of the fixed end machine head, and reduces its maintenance workload.

[0041] See the instruction manual appendix Figure 19 , 20 The jaw drive device 9 is fixedly mounted on the upper beam jaw drive device mounting surface 1.5 of the upper beam 1 or the lower beam jaw drive device mounting surface 2.5 of the lower beam 2 via a drive device base 9.1 using bolts. After the jaw drive device 9 is fixedly connected to the upper beam 1 or the lower beam 2 of the fixed head, the hinge joint of the other end of the unloading wire rope 9.3.3 is set in the unloading wire rope mounting groove 8.3.1.4 of the jaw slider 8.3.1, and is hinged to the hinge joint of the unloading wire rope 9.3.3 by setting a bolt (or cylindrical pin) in the unloading wire rope connection hole 8.3.1.5. It should be further noted that during the actual assembly of the jaw assembly 8 and the jaw drive device 9, one end of the unloading wire rope 9.3.3 is first hinged to the jaw slider 8.3.1, and after the jaw drive device 9 is assembled with the upper beam 1 or the lower beam 2, the other end of the unloading wire rope 9.3.3 is hinged to the unloading piston rod 9.3.2.

[0042] The jaw assembly 8 and jaw drive device 9 are assembled in the upper beam 1 or lower beam 2 in an open manner along the stretching direction of the aluminum alloy sheet, which greatly facilitates the overall disassembly and maintenance of the jaw assembly 8 and jaw drive device 9; see the attached instruction manual. Figure 19 , 20Taking the fixed-end machine head structure as an example: when it is necessary to disassemble the jaw drive device 9 and repair the jaw assembly 8, first disconnect the connection between the unloading wire rope 9.3.3 and the unloading piston rod 9.3.2 from the left side, then remove the connecting bolts between the jaw drive device base 9.1 and the upper beam 1 or lower beam 2, and the jaw drive device 9 can be removed from the left side of the fixed-end machine head; then remove the connecting bolts between the jaw base plate 8.1 and the upper beam 1 or lower beam 2, and the jaw assembly 8 can be removed from the left side of the fixed-end machine head; therefore, the jaw assembly 8 and the jaw drive device 9 are very easy to disassemble and repair as a whole.

[0043] In addition, the jaw drive device 9 of this application has an upper and lower split structure, which is lighter than the existing sequential drive structure using synchronous hydraulic cylinder and secondary clamping cylinder, and also improves the difficulty of maintenance and replacement of jaw assembly 8 and jaw drive device 9.

[0044] Furthermore, the operation is very convenient when a single jaw slider 8.3, jaw drive assembly 9.2, or jaw unloading assembly 9.3 malfunctions and needs to be replaced or repaired. For example, when a jaw slider 8.3 needs to be replaced individually, first disconnect the jaw slider 8.3 from the outer end of the unloading wire rope 9.3.3 and the unloading piston rod 9.3.2, and then the jaw slider 8.3 can be removed from the right side of the fixed end of the machine head for repair or replacement. When a jaw drive assembly 9.2 needs to be replaced individually, first disconnect the jaw drive assembly 9.2 from the drive cylinder... By connecting the bolts between the fixed seats 9.1.2, the jaw drive assembly 9.2 can be removed from the left side of the fixed end machine head for maintenance or replacement. When a jaw unloading assembly 9.3 needs to be replaced individually, first disconnect the connection between the unloading wire rope 9.3.3 and the unloading piston rod 9.3.2, then remove the connecting bolts between the jaw unloading assembly 9.3 and the drive cylinder fixed seat 9.1.2. The jaw unloading assembly 9.3 can then be removed from the left side of the fixed end machine head for maintenance or replacement. Therefore, the maintenance and repair of the jaw assembly 8 and the jaw drive device 9 are very convenient.

[0045] Furthermore, the jaw drive device 9 and jaw assembly 8 are set at the same tilt angle in the fixed end of the machine head. Therefore, when the drive push rod 9.2.3 abuts against the end face of the jaw slider 8.3.1 and drives the jaw slider 8.3.1 to move along the jaw guide rail 8.2, the drive push rod 9.2.3 and the jaw slider 8.3.1 move in the same direction, and no sliding friction occurs between the contact surfaces. This improves the service life of the drive push rod 9.2.3 and the jaw slider 8.3.1, reduces the maintenance frequency of the jaw assembly 8 and the jaw drive device 9, and lowers the operating and maintenance costs of the aluminum alloy sheet tension stretching machine.

[0046] Included in the instruction manual Figure 20Taking an aluminum alloy sheet tension stretching machine as an example, the working process of the wear-free drive structure of the jaws is explained in detail: During the operation of the aluminum alloy sheet tension stretching machine, the two ends of the aluminum alloy sheet are respectively set in the material groove 3 of the fixed end machine head and the stretching end machine head. The drive piston rods 9.2.2 in the upper beam 1 and the lower beam 2 extend obliquely to the right simultaneously, pushing the drive push rod 9.2.3 to move along the push rod guide sleeve 9.4. The drive push rod 9.2.3 abuts against the large end face of the jaw slider 8.3, pushing it to slide obliquely to the right along the jaw guide rail 8.2. When the jaw slider 8.3 slides obliquely to the right along the jaw guide rail 8.2, it drives the upper and lower jaws to move obliquely. When the jaw plates 8.4 close, they clamp the aluminum alloy sheet. When the drive rod 9.2.3 pushes the jaw slider 8.3 to move, since the jaw drive device 9 and the jaw assembly 8 have the same tilt angle (i.e., the drive rod 9.2.3 and the jaw slider 8.3 move in the same direction), there is no sliding friction between the drive rod 9.2.3 and the jaw slider 8.3. This improves the service life of the drive rod 9.2.3 and the jaw slider 8.3, reduces the frequency of replacement and maintenance of the drive rod 9.2.3 and the jaw slider 8.3, and reduces the operating and maintenance costs of the aluminum alloy sheet tension stretching machine.

[0047] When the upper and lower jaw plates 8.4 loosen the aluminum alloy sheet, the drive piston rod 9.2.2 and the unloading piston rod 9.3.2 in the jaw drive device 9 retract. The unloading piston rod 9.3.2 pulls the jaw slider 8.3 along the jaw guide rail 8.2 to the initial position through the unloading wire rope 9.3.3, thereby causing the upper and lower jaw plates 8.4 to open.

[0048] The parts of this utility model not described in detail are existing technologies.

Claims

1. A wear-free driving structure for the jaws of an aluminum alloy sheet tension stretching machine, used to drive the jaws of the fixed end or stretching end of the machine head to close or open; characterized in that: It includes a set of jaw assemblies (8) and jaw drive devices (9); the set of jaw assemblies (8) and jaw drive devices (9) are fixedly installed in a symmetrical and inclined manner on the lower part of the upper beam (1) and the upper part of the lower beam (2) of the fixed end machine head or the stretching end machine head; the jaw assemblies (8) and jaw drive devices (9) in the same group have the same inclination angle, so as to eliminate the relative sliding friction between the driving push rod (9.2.3) in the jaw drive device (9) and the jaw slider (8.3) in the jaw assembly (8) when the jaw slider (8.3) in the jaw assembly (8) moves.

2. The wear-free driving structure for the jaws of the aluminum alloy sheet tension stretching machine according to claim 1, characterized in that: The jaw assembly (8) includes a jaw base plate (8.1), a jaw guide rail (8.2), and a jaw slider (8.3). The jaw guide rail (8.2) is elastically connected to the jaw base plate (8.1), and the jaw slider (8.3) is slidably connected to the jaw guide rail (8.2). The jaw assembly (8) is fixedly mounted on the lower part of the upper beam (1) and the upper part of the lower beam (2) via the jaw base plate (8.1).

3. The wear-free driving structure for the jaws of the aluminum alloy sheet tension stretching machine according to claim 2, characterized in that: The jaw drive device (9) includes a jaw drive device base (9.1) and a jaw drive assembly (9.2); the jaw drive assembly (9.2) includes a drive cylinder (9.2.1), a drive piston rod (9.2.2), and a drive push rod (9.2.3), the drive piston rod (9.2.2) is movably disposed in the drive cylinder (9.2.1), and the drive push rod (9.2.3) is hinged to the outer end of the drive piston rod (9.2.2); the jaw drive... The moving assembly (9.2) is fixedly connected to the drive device base (9.1) via the drive cylinder (9.2.1); the jaw drive device (9) is fixedly installed at the lower part of the upper beam (1) and the upper part of the lower beam (2) via the jaw drive device base (9.1); when the drive piston rod (9.2.2) moves outward, the drive push rod (9.2.3) abuts against the jaw slider (8.3), and drives the jaw slider (8.3) to move along the jaw guide rail (8.2).

4. The wear-free driving structure for the jaws of the aluminum alloy sheet tension stretching machine according to claim 3, characterized in that: The jaw drive device base (9.1) is provided with a drive push rod hole ( 9.1.1.1), the drive push rod (9.2.3) is slidably set in the drive push rod hole ( 9.1.1.1) 5. The wear-free driving structure for the jaws of the aluminum alloy sheet tension stretching machine according to claim 3, characterized in that: The jaw drive device (9) also includes a jaw unloading assembly (9.3); the jaw unloading assembly (9.3) includes an unloading cylinder (9.3.1), an unloading piston rod (9.3.2), and an unloading wire rope (9.3.3), with hinge joints fixed at both ends of the unloading wire rope (9.3.3); the unloading piston rod (9.3.2) is movably disposed in the unloading cylinder (9.3.1); one end of the unloading wire rope (9.3.3) is hinged to the outer end of the unloading piston rod (9.3.2) through the hinge joint, and the other end is hinged to the jaw slider (8.3) of the jaw assembly (8) through the hinge joint.

6. The wear-free driving structure for the jaws of the aluminum alloy sheet tension stretching machine according to claim 2, characterized in that: A jaw plate (8.4) is also fixedly installed on the jaw slider (8.3).

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