Automobile workpiece conveying device

Abstract

The utility model relates to an automobile workpiece conveying device, and belongs to the technical field of workpiece conveying. The device comprises a fixed frame, a conveying guide rail arranged on the fixed frame, a movable frame arranged on the conveying guide rail and a jacking frame, the fixed frame is arranged on a conveyed station base plate, and the movable frame can walk on the conveying guide rail under the action of a driving mechanism. The jacking frame is arranged on the moving frame through a shear fork lifting mechanism, a plurality of positioning pieces used for positioning workpieces are arranged on the jacking frame, and the shear fork lifting mechanism comprises a pair of X-shaped fork arm assemblies and a lifting air cylinder used for driving the X-shaped fork arm assemblies to ascend and descend. The lifting device is simple in structure, convenient to operate and stable in operation during lifting, can meet the requirement for lifting synchronism, can greatly save the installation space, and is particularly suitable for occasions with limited installation space and the requirement for precision of the lifting height.

Description

Technical Field

[0001] The utility model relates to an automobile workpiece conveying device, belonging to the technical field of workpiece conveying. Background Art

[0002] In the field of automobile manufacturing, in order to meet the diverse needs of consumers, the automobile manufacturing industry has gradually developed towards a more flexible and high-tempo direction. To meet the production requirements of high-tempo flexibility of automobile workpieces, the workpieces need to be conveyed in different operation areas on the production line. For example, after the workpiece is processed at the welding position, it needs to rely on a conveying device to transfer the workpiece to the blanking position to complete the blanking of the workpiece.

[0003] The conveying device not only needs to have a conveying function, but also needs to have a lifting function. The workpiece is conveyed to a specified position through the conveying part, and then the workpiece can be placed on the corresponding working position in the operation area through the lifting part for processing. The existing lifting parts mostly use lifting cylinders for driving. Generally, this lifting structure is arranged with a lifting cylinder in the middle or two lifting cylinders, and a guiding structure also needs to be set to assist to complete the operation. For example, multiple guiding rods are arranged on both sides or around. The driving end of the lifting cylinder is connected to a carrier for placing the workpiece, and the guiding rods are connected to the carrier. The synchronism of the movement between the guiding rods is poor, and the repeated accuracy of the lifting height is poor, which will affect the lifting of the workpiece. Sometimes, it is also necessary to assist in adjusting the position of the workpiece in the operation area, resulting in a large labor intensity for workers; when using a cylinder for lifting, in order to meet the requirements of the lifting stroke, the required installation space is large, and this conveying device is not applicable to the occasions where the installation space is limited and there are accuracy requirements for the lifting height. Summary of the Invention

[0004] The utility model aims at the deficiencies of the existing technology and provides an automobile workpiece conveying device.

[0005] The technical solution for the utility model to solve the above technical problems is as follows: an automobile workpiece conveying device, comprising a fixed frame, a conveying guide rail arranged on the fixed frame, a moving frame and a jacking frame arranged on the conveying guide rail. The fixed frame is arranged on the working position substrate of the conveyor. The moving frame can walk on the conveying guide rail under the action of a driving mechanism. The jacking frame is arranged on the moving frame through a scissor lift mechanism. A plurality of positioning parts for positioning the workpiece are arranged on the jacking frame. The scissor lift mechanism comprises a pair of X-shaped fork arm assemblies and a lift cylinder for driving the X-shaped fork arm assemblies to perform a lifting action.

[0006] The beneficial effects of the present utility model are as follows: After the workpiece is welded at the welding position, the scissor lift mechanism of the conveying device operates, the lifting frame rises, the positioning member on the lifting frame positions the welded workpiece, the driving mechanism operates, the moving frame runs along the conveying guide rail to the blanking position, the scissor lift mechanism operates, the lifting frame descends, the workpiece descends to the blanking position, and the workpiece can fall onto the peripheral fixture on the station substrate at the blanking position. After the scissor lift mechanism descends in place, the driving mechanism operates, and the moving frame can return to the welding position to wait for the conveyance of the next workpiece. The structure of the present utility model is simple, the operation is convenient, and the operation is stable during lifting. It can not only meet the requirements of lifting synchronization, but also greatly save the installation space, and is especially suitable for occasions where the installation space is limited and there are accuracy requirements for the lifting height.

[0007] On the basis of the above technical solution, the present utility model can be further improved as follows.

[0008] Further, the X-shaped fork arm assembly includes a first fork arm and a second fork arm hinged in the middle. The bottom end of the first fork arm is hinged to the moving frame to form a fork arm fixed end. The top end of the first fork arm is horizontally slidably or rollably connected to the lifting frame. The bottom end of the second fork arm is horizontally slidably or rollably connected to the moving frame to form a fork arm movable end. The top end of the second fork arm is hinged to the lifting frame. A connecting rod is provided between the two second fork arms. The cylinder body of the lifting cylinder is hinged to the moving frame, and its piston rod is hinged to the connecting rod.

[0009] The beneficial effect of adopting the above further solution is that the scissor lift is compact in structure, can realize the vertical lifting of the lifting frame, and requires a small installation space while ensuring the requirement of lifting height, making the use occasions of the conveying device more extensive.

[0010] Further, the driving mechanism includes a rack, a gear meshing with the rack, and a driving motor. The driving motor is arranged on the moving frame. The gear is arranged on the output shaft of the driving motor. The rack is arranged on the fixed frame or the conveying guide rail.

[0011] The beneficial effect of adopting the above further solution is that when the driving motor rotates, it drives the gear to rotate. Under the meshing action of the gear and the rack, the moving frame is realized to run on the conveying guide rail. Adopting the gear-rack meshing transmission method not only has high efficiency, but also has good stability and low noise.

[0012] Further, guide wheels are arranged on the moving frame, and guide grooves for guiding the guide wheels are arranged on the conveying guide rail or the fixed frame.

[0013] The beneficial effect of adopting the above further solution is that guide wheels can be respectively arranged on both sides of the moving frame, the outer diameter of the guide wheels is adapted to the width of the guide groove, and the cooperation between the guide wheels and the guide groove further ensures the stable and accurate operation of the moving frame on the conveying guide rail.

[0014] Further, the guide wheels are connected to the moving frame through connecting brackets.

[0015] The beneficial effect of adopting the above further solution is that the wheel axles of the guide wheels are installed on the connecting brackets, the connecting brackets are installed on the front side and / or the rear side of the moving frame, and the wheel axles of the guide wheels are in the vertical plane.

[0016] Further, rollers are arranged at the bottom of the moving frame, and the rollers can travel on the conveying guide rail.

[0017] The beneficial effect of adopting the above further solution is that the design of the rollers enables the moving frame to roll and travel on the conveying guide rail, further reducing the friction between the moving frame and the conveying guide rail and improving the conveying operation efficiency.

[0018] Further, it further includes a frame limiting mechanism for limiting the in-place moving frame. The frame limiting mechanism includes a limiting bracket and a limiting block and / or a buffer arranged on the limiting bracket, and the limiting bracket is arranged on the corresponding station substrate.

[0019] The beneficial effect of adopting the above further solution is that when the conveying device is in place, such as when it conveys and runs to the welding position, the limiting block or buffer on the station substrate at the welding position can limit the moving frame. When it conveys and runs to the blanking position while carrying the workpiece, the limiting block or buffer on the station substrate at the blanking position can limit the conveying device. The frame limiting mechanism can ensure that the conveying device is accurately in place at the corresponding station.

[0020] Further, it further includes a pressing mechanism for pressing the in-place moving frame. The pressing mechanism includes a pressing arm, a pressing block arranged on the pressing arm, and a pressing cylinder for driving the pressing arm to swing and press or release the moving frame.

[0021] The beneficial effect of adopting the above further solution is that in order to further ensure the stability of the moving frame after the conveying device is in place, not only the limiting block is set, but also the pressing block is set. The limiting block can cooperate with the pressing block to hold the frame body of the moving frame tightly and prevent the moving frame from retreating.

[0022] Further, it further includes a positioning mechanism for limiting the pressing arm that swings to the in-place position. The positioning mechanism includes a positioning block and a stop block that cooperate with the positioning block. The stop block is connected to the station substrate or the cylinder body of the pressing cylinder through a connecting block, and the positioning block is arranged on the pressing arm.

[0023] The beneficial effect of adopting the above further solution is that when the pressing cylinder operates and the cylinder arm rotates, the pressing block on the pressing arm can act on the moving frame to press it. However, in order to prevent excessive rotation, a positioning mechanism for limiting the maximum swing position of the pressing arm is also provided. The stop block can adopt a U-shaped structure, and the positioning block can be a block structure that can be inserted and matched with the stop block.

[0024] Further, a cylinder arm is provided on the pressing cylinder, the pressing arm is arranged on the cylinder arm, and a movable hole for the pressing arm to rotate is provided on the station substrate.

[0025] The beneficial effect of adopting the above further solution is that when the moving frame is transported in place, the pressing block on the pressing arm can act on the moving frame to press it. When the moving frame needs to be transported and transferred, the pressing arm needs to avoid interference to prevent it from interfering with the movement of the moving frame on the conveying guide rail. At this time, the pressing arm can rotate into the movable hole under the action of the pressing cylinder to avoid interference.

[0026] Further, a connecting plate is also provided between the station substrates.

[0027] The beneficial effect of adopting the above further solution is that the connecting plate can ensure the stability of the relative positions of the station substrates to be conveyed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the present utility model;

[0029] Figure 2 is a schematic structural diagram of the scissors lift mechanism on the moving frame of the present utility model;

[0030] Figure 3 is a schematic structural diagram of the frame limiting mechanism and the positioning mechanism of the present utility model;

[0031] Figure 4 is Figure 3 a partial enlarged view of part A in

[0032] Figure 5 is a schematic structural diagram of the driving motor of the present utility model;

[0033] In the figure, 1 is a fixed frame; 2 is a conveying guide rail; 3 is a moving frame; 4 is a lifting frame; 5 is a driving motor; 6 is a rack; 7 is a gear; 8 is a mounting plate; 9 is a station substrate at the welding position; 10 is a station substrate at the blanking position; 11 is a connecting plate; 12 is a roller; 13 is a guide wheel; 14 is a connecting bracket; 15 is a limit block; 16 is a buffer; 17 is a pressing block; 18 is a pressing arm; 19 is a cylinder arm; 20 is a pressing cylinder; 21 is a stop block; 22 is a positioning block; 23 is a movable hole; 24 is a guide groove; 25 is a first fork arm; 26 is a second fork arm; 27 is a lifting cylinder; 28 is a positioning member. Specific embodiments

[0034] The principles and features of the present invention will be described below in conjunction with examples. The examples are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0035] As Figures 1 - 5 shown, an automobile workpiece conveying device includes a fixed frame 1, a conveying guide rail 2 provided on the fixed frame 1, a moving frame 3 provided on the conveying guide rail 2, and a lifting frame 4. The fixed frame 1 is arranged on the station substrate of the conveyor. The moving frame 3 can move on the conveying guide rail 2 under the action of a driving mechanism. The lifting frame 4 is arranged on the moving frame 3 through a scissor lift mechanism. A plurality of positioning members 28 for positioning workpieces are provided on the lifting frame 4. The scissor lift mechanism includes a pair of X-shaped fork arm assemblies and a lifting cylinder 27 for driving the lifting action of the X-shaped fork arm assemblies.

[0036] The X-shaped fork arm assembly includes a first fork arm 25 and a second fork arm 26 hinged in the middle. The bottom end of the first fork arm 25 is hinged to the moving frame 3 to form a fork arm fixed end. The top end of the first fork arm 25 is horizontally slidably or rollably connected to the lifting frame 4. The bottom end of the second fork arm 26 is horizontally slidably or rollably connected to the moving frame 3 to form a fork arm movable end. The top end of the second fork arm 26 is hinged to the lifting frame 4. A connecting rod is provided between the two second fork arms 26. The cylinder body of the lifting cylinder 27 is hinged to the moving frame 3, and its piston rod is hinged to the connecting rod. The scissor lift is compact in structure and can realize the vertical lifting of the lifting frame 4. Under the condition of ensuring the requirement of the lifting height, the required installation space is small, making the use occasion of the conveying device more extensive. In addition, in order to ensure the stability of the movable end side, the cooperation of a slider and a chute or the cooperation of a roller 12 and a wheel seat rail can be adopted to further ensure that the lifting action of the conveying device is more flexible, smooth, stable and reliable.

[0037] The driving mechanism includes a rack 6, a gear 7 meshing with the rack 6, and a driving motor 5. The driving motor 5 is arranged on the moving frame 3, the gear 7 is arranged on the output shaft of the driving motor 5, and the rack 6 is arranged on the fixed frame 1 or the conveying guide rail 2. When the driving motor 5 rotates, it drives the gear 7 to rotate. Under the meshing action of the gear 7 and the rack 6, the moving frame 3 runs on the conveying guide rail 2. The gear 7 and rack 6 meshing transmission method not only has high efficiency, but also has good stability and low noise.

[0038] Guide wheels 13 are arranged on the moving frame 3, and guide grooves 24 for guiding the guide wheels 13 are arranged on the conveying guide rail 2 or the fixed frame 1. Guide wheels 13 can be respectively arranged on both sides of the moving frame 3. The outer diameter of the guide wheels 13 is adapted to the width of the guide grooves 24. Through the cooperation of the guide wheels 13 and the guide grooves 24, it is further ensured that the moving frame 3 runs smoothly and accurately on the conveying guide rail 2.

[0039] The guide wheels 13 are connected to the moving frame 3 through connecting brackets 14. The axle of the guide wheels 13 is installed on the connecting brackets 14. The connecting brackets 14 are installed on the front side and / or the rear side of the moving frame 3, and the axle of the guide wheels 13 is in the vertical plane.

[0040] Rollers 12 are arranged at the bottom of the moving frame 3, and the rollers 12 can run on the conveying guide rail 2. The design of the rollers 12 enables the moving frame 3 to roll and run on the conveying guide rail 2, further reducing the friction between the moving frame 3 and the conveying guide rail 2 and improving the conveying operation efficiency.

[0041] It also includes a frame limiting mechanism for limiting the in-place moving frame 3. The frame limiting mechanism includes a limiting bracket and a limiting block 15 and / or a buffer 16 arranged on the limiting bracket. The limiting bracket is arranged on the corresponding station substrate. When the conveying device is in place, such as when it runs to the welding position, the limiting block 15 or the buffer 16 on the station substrate 9 at the welding position can limit the moving frame 3. When carrying the workpiece and running to the blanking position, the limiting block 15 or the buffer 16 on the station substrate 10 at the blanking position can limit the conveying device. Through the frame limiting mechanism, it can be ensured that the conveying device is accurately in place at the corresponding station.

[0042] It also includes a pressing mechanism for pressing the in-place moving frame 3. The pressing mechanism includes a pressing arm 18, a pressing block 17 arranged on the pressing arm 18, and a pressing cylinder 20 for driving the pressing arm 18 to swing and press or release the moving frame 3. In order to further ensure the stability of the moving frame 3 after the conveying device is in place, not only the limiting block 15 is set, but also the pressing block 17 is set. The limiting block 15 can cooperate with the pressing block 17 to tightly hold the frame body of the moving frame 3 to prevent the moving frame 3 from moving backward.

[0043] It also includes a positioning mechanism for limiting the swinging pressure arm 18, which includes a positioning block 22 and a stopper 21 matched with the positioning block 22. The stopper 21 is connected to the station base plate or the cylinder body of the clamping cylinder 20 through a connecting block, and the positioning block 22 is arranged on the pressure arm 18. When the clamping cylinder 20 is actuated, the cylinder arm 19 rotates, so that the clamping block 17 on the pressure arm 18 can act on the moving frame 3 to clamp it, but it cannot rotate excessively, so a positioning mechanism is also provided to limit the maximum swinging position of the pressure arm 18, wherein the stopper 21 can adopt a U-shaped structure, and the positioning block 22 can be a block structure that can be plugged and matched with the stopper 21.

[0044] The clamping cylinder 20 is provided with a cylinder arm 19, and the clamping arm 18 is arranged on the cylinder arm 19. The station substrate is provided with a movable hole 23 for the clamping arm 18 to rotate. When the mobile frame 3 is transported to the position, the clamping block 17 on the clamping arm 18 can act on the mobile frame 3 to clamp it. When the mobile frame 3 needs to be transported, the clamping arm 18 needs to avoid interference with the movement of the mobile frame 3 on the conveying guide rail 2. At this time, the clamping arm 18 can be rotated to the movable hole 23 under the action of the clamping cylinder 20 to avoid. For the rotation of the cylinder arm 19, the cylinder arm 19 is specifically arranged on the housing through the arm shaft rotation, and the cylinder arm 19 can rotate with the arm shaft. The arm shaft can rotate under the action of the clamping cylinder 20. For example, the piston rod of the clamping cylinder 20 can drive the arm shaft to rotate through the connecting rod, thereby realizing the rotation drive of the cylinder arm 19.

[0045] A connecting plate 11 is also provided between the station substrates. The connecting plate 11 can ensure the stability of the relative positions between the station substrates that need to be transferred.

[0046] The driving motor 5 is connected to the moving frame 3 through the mounting plate 8, and the gear 7 is connected to the driving motor 5. The moving frame 3 is driven by the driving motor 5 through the meshing of the gear 7 and the rack 6, and the moving frame 3 can reciprocate along the length direction of the conveying guide rail 2 under the joint action of the roller 12 and the guide wheel 13.

[0047] The scissor fork lifting mechanism is installed on the mobile frame 3, the lifting frame 4 is arranged on the scissor fork lifting mechanism, and multiple sets of positioning members 28 are installed on the lifting frame 4. When the mobile frame 3 is about to be in place, the buffer 16 can slow down the forward speed of the mobile frame 3, and the limit block 15 finally limits the position of the mobile frame 3. At the same time, the cylinder arm 19 drives the pressing arm 18 and the pressing block 17 to rotate, and finally holds the mobile frame 3 tightly to prevent it from retreating.

[0048] When the workpiece is welded at the welding position, there are peripheral fixtures for positioning the workpiece on the station substrate 9 at the welding position. These fixtures are outside the conveying area of the conveying device and will not interfere with conveying and lifting. After the workpiece is welded at the welding position, the scissor lift mechanism drives the lifting frame 4 and the positioning members 28 thereon, such as positioning pins and positioning columns. After the positioning members 28 position the workpiece, it can continue to rise to a predetermined height; the cylinder arm 19 in the pressing mechanism on the station substrate 9 at the welding position drives the pressing arm 18 and the pressing block 17 thereon to rotate and open, releasing the moving frame 3. The drive motor 5 operates, the gear 7 rotates, and the gear 7 meshes with the rack 6 to drive the workpiece to run along the length direction of the conveying guide rail 2 to the blanking position. The frame limiting mechanism on the station substrate 10 at the blanking position limits the moving frame 3, and the pressing mechanism can press the moving frame 3 to prevent it from retreating. The scissor lift mechanism descends, and the workpiece falls onto the peripheral fixtures on the station substrate 10 at the blanking position. After the scissor lift mechanism descends in place, the pressing mechanism opens, the drive mechanism operates, and the moving frame 3 returns to the welding position. The frame limiting structure and the pressing mechanism on the station substrate 9 at the welding position limit and hold the moving frame 3, completing the conveyance of the workpiece between the welding position and the blanking position.

[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automobile workpiece conveying device, characterized in that: The invention comprises a fixed frame (1), a conveying guide rail (2) arranged on the fixed frame (1), a movable frame (3) arranged on the conveying guide rail (2), and a lifting frame (4); the fixed frame (1) is arranged on a conveying station substrate; the movable frame (3) can move on the conveying guide rail (2) under the action of a driving mechanism; the lifting frame (4) is arranged on the movable frame (3) through a scissor fork lifting mechanism; a plurality of positioning members (28) for positioning workpieces are arranged on the lifting frame (4); the scissor fork lifting mechanism comprises a pair of X-shaped fork arm assemblies and a lifting cylinder (27) for driving the lifting action of the X-shaped fork arm assemblies.

2. The automobile workpiece conveying device according to claim 1, characterized in that: The X-shaped fork arm assembly comprises a first fork arm (25) and a second fork arm (26) which are hinged in the middle, the bottom end of the first fork arm (25) is hinged to the moving frame (3) to form a fork arm fixed end, the top end of the first fork arm (25) is horizontally slidably or rollingly connected to the lifting frame (4), the bottom end of the second fork arm (26) is horizontally slidably or rollingly connected to the moving frame (3) to form a fork arm movable end, the top end of the second fork arm (26) is hinged to the lifting frame (4), a connecting rod is provided between the two second fork arms (26), the cylinder body of the lifting cylinder (27) is hinged to the moving frame (3), and its piston rod is hinged to the connecting rod.

3. The automobile workpiece conveying device according to claim 1, characterized in that: The driving mechanism comprises a rack (6), a gear (7) meshing with the rack (6), and a driving motor (5); the driving motor (5) is arranged on the moving frame (3); the gear (7) is arranged on the output shaft of the driving motor (5); and the rack (6) is arranged on the fixed frame (1) or the conveying guide rail (2).

4. The automobile workpiece conveying device according to claim 1, characterized in that: The movable frame (3) is provided with a guide wheel (13), and the conveying rail (2) or the fixed frame (1) is provided with a guide groove (24) for guiding the guide wheel (13); and / or the bottom of the movable frame (3) is provided with a roller (12), and the roller (12) is capable of moving on the conveying rail (2).

5. The automobile workpiece conveying device according to claim 4, characterized in that: The guide wheel (13) is connected to the movable frame (3) via a connecting bracket (14).

6. The automobile workpiece conveying device according to any one of claims 1 to 5, characterized in that: It also includes a frame limiting mechanism for limiting the position of the movable frame (3) in place, the frame limiting mechanism including a limiting bracket and a limiting block (15) and / or a buffer (16) arranged on the limiting bracket, and the limiting bracket is arranged on the corresponding workstation substrate.

7. The automobile workpiece conveying device according to claim 6, characterized in that: It also includes a clamping mechanism for clamping the mobile frame (3) in place, the clamping mechanism including a clamping arm (18), a clamping block (17) arranged on the clamping arm (18), and a clamping cylinder (20) for driving the clamping arm (18) to swing and clamp or release the mobile frame (3).

8. The automobile workpiece conveying device according to claim 7, characterized in that: It also includes a positioning mechanism for limiting the position of the pressing arm (18) that has swung into position, the positioning mechanism including a positioning block (22) and a stopper (21) that cooperates with the positioning block (22), the stopper (21) being connected to the station base plate or the cylinder body of the pressing cylinder (20) via a connecting block, and the positioning block (22) being arranged on the pressing arm (18).

9. The automobile workpiece conveying device according to claim 7, characterized in that: The pressing cylinder (20) is provided with a cylinder arm (19), the pressing arm (18) is arranged on the cylinder arm (19), and the station base plate is provided with a movable hole (23) for the pressing arm (18) to rotate.

10. The automobile workpiece conveying device according to any one of claims 1 to 5, characterized in that: A connecting plate (11) is provided between the station substrates.

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