Automatic clamping device for front frame of loading machine

Abstract

The utility model discloses an automatic clamping device for a front frame of a loading machine. The second clamping component is provided with a pair of supporting seat plates which are respectively driven to move up and down, and each supporting seat plate is provided with a positioning block matched with a flange hole of a front frame of the loading machine; the first clamping component is provided with a pair of supporting sliding plates which are driven to transversely move close to or away from each other, one supporting sliding plate is provided with a first clamping plate, and the other supporting sliding plate is provided with a positioning assembly and a second clamping plate which is driven by an overturning assembly to overturn; and under the driving of the overturning assembly, the second clamping plate overturns to enable the front frame of the loading machine to transversely pass through, and overturns to the position opposite to the first clamping plate to be in contact with the positioning assembly. According to the clamping device, clamping and fixing of the front frame of the loading machine are achieved, reduction of welding space and blocking of welding movement caused by end face placing and clamping are avoided, rapid entering of the front frame of the loading machine is achieved, and the clamping device is suitable for a production line of the front frame of the loading machine.

Description

Technical Field

[0001] The utility model relates to a clamping tool, belongs to the technical field of automatic welding, and specifically relates to an automatic clamping device for a front frame of a loader. Background Art

[0002] The front frame of the loader is the supporting structure of the front part of the loader, which can bear most of the weight and impact force, ensuring the stability and safety of the overall structure of the loader; the front frame of the loader itself has multiple mounting holes to match the connection of the front wheels, booms, buckets and other parts of the loader. For example, the flange holes of the front frame of the loader are rotatably mounted on the main frame of the loader through the supporting shaft, and the hydraulic system drives the front frame of the loader to drive the steering;

[0003] The front frame of the loader is mainly made of high-strength steel by welding. Clamping and fixing before welding is essential. Figure 6 As shown, the welding of the front frame of the traditional loader is to place the relatively stable end face of the front frame of the loader on the support plate to maintain the overall stability, that is, the relatively stable first support end face A and the second support end face B on the same side of the front frame of the loader are placed on the support plate and fixed, and then the clamping device is arranged on the side of the front frame of the loader for position fixing, and then the welding is performed one by one by a welding robot. Although it can meet the welding requirements of the front frame of the loader, it has the following problems: 1. Due to the stable end face of the front frame of the loader being placed on the support plate , too much contact affects the welding space of the welding robot, that is, the welding robot is blocked by the support plate when moving, and cannot effectively perform continuous welding on the stable end surface. It needs to go through different paths to different angles and positions, which reduces the welding efficiency and quality; 2. The clamping device cannot meet the sequential welding of multiple loader front frames in the production line. That is, in traditional welding, the loader front frame is fixed by horizontal and longitudinal clamping devices. The loader front frame needs to be hoisted into the clamping station or it is inconvenient to avoid the clamping device, and it cannot be quickly entered and positioned by a mobile trolley. Summary of the invention

[0004] The utility model aims to provide an automatic clamping device for a front frame of a loader, which not only realizes the clamping and fixing of the front frame of the loader, avoids the reduction of welding space and the obstruction of welding movement caused by clamping the end face, but also realizes the rapid entry of the front frame of the loader, and is suitable for the production line of the front frame of the loader.

[0005] To achieve the above purpose, the automatic clamping device for the front frame of a loader comprises:

[0006] Support the motherboard;

[0007] The second clamping component is located on the supporting main board and has a pair of supporting seat plates which are driven to move up and down respectively; each supporting seat plate is provided with a positioning block which matches the flange hole of the front frame of the loader;

[0008] A first clamping member is located on the supporting main board and has a pair of supporting slide plates driven to move laterally closer or farther away;

[0009] A pair of supporting slides are symmetrically located on both sides of a line connecting a pair of supporting seat plates, one of the supporting slides is provided with a first clamping plate, and the other supporting slide is provided with a positioning assembly and a second clamping plate driven to be flipped by a flipping assembly;

[0010] The flip axis of the second clamping plate is arranged horizontally and rotationally, and under the drive of the flip assembly, the second clamping plate flips a certain angle, so that the loader front frame passes horizontally and is located between a pair of support seat plates, and flips to the opposite side of the first clamping plate and contacts the positioning assembly.

[0011] Further, the flip assembly comprises a first hydraulic cylinder and a connecting rod;

[0012] The first hydraulic cylinder is rotatably mounted on the supporting slide plate, the telescopic end is rotatably connected to one end of a connecting rod, and the other end of the connecting rod is fixedly connected to the turning shaft where the second clamping plate is located.

[0013] Further, the positioning assembly has a second hydraulic cylinder and a fixing seat fixed on the supporting slide plate;

[0014] The telescopic end of the second hydraulic cylinder slides through the fixing seat and faces the second clamping plate, and a positioning rod facing the second clamping plate is fixed on the fixing seat.

[0015] Preferably, the second clamping component further comprises a pair of second screws; each second screw axis is arranged up and down and is threadedly connected to the support base plate, and one end is connected through a drive assembly;

[0016] The support seat plate is slidably connected to the support main board via the second slide rail.

[0017] Further, the driving assembly has a second motor and a gear assembly;

[0018] The second motor is fixed on the supporting main board, the output end of the second motor is connected to the input end of the gear assembly, and the output end of the gear assembly is fixedly connected to the second screw rod.

[0019] Furthermore, the first clamping component also has a first screw with a transverse axis and arranged in rotation;

[0020] A pair of supporting slide plates are respectively installed on the first screw rod with mutually opposite threads, and are slidably connected with the supporting main board through the first slide rail;

[0021] One end of the first screw is connected to the first motor.

[0022] Furthermore, the positioning block is a conical structure, and the cone angle faces the symmetry center.

[0023] Compared with the prior art, the automatic clamping device of the loader front frame positions the flange hole of the loader front frame by moving a pair of positioning blocks up and down, and the first clamping plate and the second clamping plate move to limit the lateral end face of the loader front frame, thereby clamping and fixing the loader front frame, avoiding the reduction of welding space caused by traditional end face clamping, and reducing the obstruction to welding movement, effectively improving the welding efficiency; and the flipping assembly drives the second clamping plate to flip a certain angle, so that the loader front frame passes horizontally and is located between a pair of support seat plates under the action of the rail trolley without affecting the lateral positioning of the loader front frame, thereby realizing the rapid entry of the loader front frame into the clamping device, meeting the needs of clamping and welding multiple loader front frames in the production line in sequence, and is suitable for the loader front frame production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the assembly of the utility model as a whole and the front frame of the loader;

[0025] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 3 It is a schematic diagram of the flip assembly in the utility model;

[0027] Figure 4 It is a schematic diagram of the overall partial structure of the utility model (some parts are hidden);

[0028] Figure 5 It is a schematic diagram of the drive assembly in the utility model;

[0029] Figure 6 It is a schematic diagram of the front frame structure of the loader;

[0030] In the figure: 10, supporting the main board;

[0031] 20. Turning assembly, 21. First hydraulic cylinder, 22. Connecting rod, 23. Turning shaft;

[0032] 30. first clamping member, 31. first screw rod, 32. supporting slide plate, 33. first slide rail, 34. first motor;

[0033] 40. second clamping member, 41. second motor, 42. gear assembly, 43. second screw rod, 44. second slide rail;

[0034] 51, first splint, 52, second splint;

[0035] 61. second hydraulic cylinder, 62. positioning rod, 63. fixing seat;

[0036] 71. support seat plate, 72. positioning block;

[0037] A, first supporting end surface, B, second supporting end surface. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0039] like Figures 1 to 4 As shown, the automatic clamping device for the front frame of the loader comprises:

[0040] Supporting main board 10;

[0041] The second clamping member 40 is located on the supporting main board 10 and has a pair of supporting seat plates 71 which are driven to move up and down respectively; each supporting seat plate 71 is provided with a positioning block 72 which matches the flange hole of the front frame of the loader;

[0042] The first clamping member 30 is located on the supporting main board 10 and has a pair of supporting slide plates 32 that are driven to move laterally closer or farther away;

[0043] A pair of support slides 32 are symmetrically located on both sides of a line connecting a pair of support seat plates 71, wherein a first clamping plate 51 is disposed on one of the support slides 32, and a positioning assembly and a second clamping plate 52 driven to be flipped by a flip assembly 20 are disposed on the other support slide 32;

[0044] The turning axis of the second clamping plate 52 is arranged transversely and rotationally, and under the driving of the turning assembly 20, the second clamping plate 52 turns over a certain angle, so that the front frame of the loader passes transversely and is located between a pair of support seat plates 71, and turns over to the position opposite to the first clamping plate 51 and contacts the positioning assembly;

[0045] Specifically, the support mainboard 10 is an integral support structure, which is vertically arranged on a fixed bracket to facilitate the welding robot to move to a corresponding position;

[0046] In the second clamping component 40, a pair of support base plates 71 can be located at the upper and lower sides of the center of the support main plate 10 and can move, and can be synchronously moved away or close, or can be moved independently. The positioning block 72 is fixed on the support base plate 71 and is used to position the flange hole of the front frame of the loader. It is explained that the flange hole of the front frame of the loader is actually used in the loader to be rotatably mounted on the main frame of the loader, and driven to steer through the hydraulic system;

[0047] In the first clamping component 30, a pair of support slides 32 can be located on both sides of the center of the support main board 10 and move, that is, the line between the pair of support slides 32 and the line between the pair of support seat plates 71 form a cross shape; the pair of support slides 32 can move independently, preferably synchronously away from or close to each other; the first clamping plate 51 is fixedly arranged, and the second clamping plate 52 can be flipped at a certain angle, preferably 0-90°. Under the action of the positioning component, the maximum flip angle of the second clamping plate 52 is 90°, that is, perpendicular to the support slide 32. Under the action of the flipping component 20, the second clamping plate 52 flips at a minimum angle to avoid the lateral movement of the front frame of the loader;

[0048] The front frame of the loader is transferred to the clamping device through the production line. For example, the first supporting end face A and the second supporting end face B of the front frame of the loader are placed on a rail trolley, and the rail trolley drives the front frame of the loader to move horizontally;

[0049] In the initial state, the flip assembly 20 drives the second clamping plate 52 to flip to a position where the angle with the support slide plate 32 is smaller, for example, the second clamping plate 52 is parallel to the support slide plate 32, and the distance between the pair of support seat plates 71 is greater than the upper and lower heights of the front frame of the loader; the front frame of the loader moves through the second clamping plate 52 and is located at the center of the support main plate 10;

[0050] A pair of support base plates 71 move up and down, and correspondingly drive the positioning blocks 72 to be respectively inserted into the upper and lower flange holes of the front frame of the loader; under the action of the flip assembly 20, the second clamping plate 52 flips to be perpendicular to the support slide plate 32 and is limited by the positioning assembly; a pair of support slide plates 32 move laterally to approach the front frame of the loader, thereby clamping the front frame of the loader;

[0051] As explained, the rail trolley can have a lifting function to raise the front frame of the loader to leave the welding station; or when a pair of positioning blocks 72 are positioned on the two flange holes of the front frame of the loader and the second clamping plate 52 is flipped to cover the front frame of the loader, a pair of support seat plates 71 can be appropriately moved upward synchronously first, and then a pair of support slide plates 32 are clamped laterally to make the rail trolley without lifting function leave the welding station; in addition, the movement of a pair of support slide plates 32 and a pair of support seat plates 71 can be controlled by a controller, and the controller can be automatically or manually controlled;

[0052] After welding is completed, the rail trolley moves to receive the front frame of the loader, and the flip assembly 20 drives the second clamping plate 52 to flip to leave space for the front frame of the loader to pass through, and the pair of supporting slide plates 32 and the pair of supporting seat plates 71 are relatively moved away, completing the release of the front frame of the loader;

[0053] The automatic clamping device of the loader front frame positions the flange hole of the loader front frame by moving a pair of positioning blocks 72 up and down, and the first clamping plate 51 and the second clamping plate 52 move to limit the transverse end face of the loader front frame. When the loader front frame is clamped and fixed, the reduction of welding space caused by traditional end face placement and clamping is avoided, and the obstruction to welding movement is effectively reduced and the welding efficiency is improved; and the flipping assembly 20 drives the second clamping plate 52 to flip a certain angle, and the loader front frame is allowed to pass horizontally under the action of the rail trolley and be located between a pair of support seat plates 71 without affecting the transverse positioning of the loader front frame, so that the loader front frame can quickly enter the clamping device, meeting the needs of welding multiple loader front frames in sequence in the production line.

[0054] like Figure 3 As shown, in the preferred embodiment, the flip assembly 20 has a first hydraulic cylinder 21 and a connecting rod 22;

[0055] The first hydraulic cylinder 21 is rotatably mounted on the supporting slide plate 32, and the telescopic end is rotatably connected to one end of the connecting rod 22, and the other end of the connecting rod 22 is fixedly connected to the turning shaft 23 where the second clamping plate 52 is located;

[0056] Specifically, the second clamping plate 52 is fixedly mounted on the flip shaft 23, and the flip shaft 23 is rotatably mounted on the supporting slide plate 32 through a bearing;

[0057] After the first hydraulic cylinder 21 is started, the telescopic end drives the connecting rod 22, so that one end of the connecting rod 22 rotates around the other end, that is, the connecting rod 22 drives the turning shaft 23 to rotate, so that the second clamping plate 52 turns over, and the lateral movement of the front frame of the loader can be "opened and closed";

[0058] like Figure 3 As shown, further, the positioning assembly has a second hydraulic cylinder 61 and a fixing seat 63 fixed on the supporting slide plate 32;

[0059] The telescopic end of the second hydraulic cylinder 61 slides through the fixing seat 63 and faces the second clamping plate 52;

[0060] A positioning rod 62 facing the second clamping plate 52 is fixed on the fixing seat 63;

[0061] Specifically, the positioning assembly is used to limit the flipping angle of the second clamping plate 52;

[0062] The telescopic movement of the second hydraulic cylinder 61 can initially position the second clamping plate 52 for flipping, while the positioning rod 62 on the fixed seat 63 finally positions the second clamping plate 52 for flipping; that is, under the drive of the first hydraulic cylinder 21 and the connecting rod 22, the flipping of the second clamping plate 52 has a certain impact, the second hydraulic cylinder 61 can mitigate this impact, and the positioning rod 62 performs the final positioning.

[0063] like Figure 4 , Figure 5 As shown, in the preferred embodiment, the second clamping member 40 further includes a pair of second screw rods 43; each second screw rod 43 is arranged vertically and threadedly connected to the support base plate 71, and one end is connected through a driving assembly;

[0064] The support seat plate 71 is slidably connected to the support main plate 10 via the second slide rail 44;

[0065] like Figure 5 As shown, further, the driving assembly has a second motor 41 and a gear assembly 42;

[0066] The second motor 41 is fixed on the supporting main board 10, and the output end is connected to the input end of the gear assembly 42, and the output end of the gear assembly 42 is fixedly connected to the second screw 43;

[0067] Specifically, the support seat plate 71 is provided with an ear seat threadedly connected to the second screw rod 43;

[0068] After the second motor 41 is started, the second screw 43 is driven to rotate through the gear assembly 42. The axis of the second screw 43 is arranged up and down, driving the support base plate 71 to slide on the support main board 10;

[0069] The gear assembly 42 may have a driving wheel connected to the second motor 41, a plurality of idler wheels, and a driven wheel connected to the second screw 43;

[0070] As explained, the second motor 41 is controlled by the controller to start, stop, and rotate forward and reverse.

[0071] like Figure 4 As shown, in the preferred embodiment, the first clamping member 30 further comprises a first screw 31 with a transverse axis and a rotational arrangement;

[0072] A pair of supporting slide plates 32 are respectively installed on the first screw rod 31 with mutually opposite threads, and are slidably connected to the supporting main board 10 through the first slide rail 33;

[0073] One end of the first screw rod 31 is connected to the first motor 34;

[0074] Specifically, the first motor 34 drives the first screw 31 to rotate, and the mutually opposite threads on the first screw 31 correspondingly drive the pair of support slides 32 to slide on the support main board 10, that is, the pair of support slides 32 move closer to or away from each other;

[0075] Furthermore, the positioning block 72 is a conical structure, and the cone angle is oriented toward the symmetry center;

[0076] The tapered structure is used to better position the flange hole of the loader front frame.

[0077] When the automatic clamping device for the front frame of a loader is used, the first hydraulic cylinder 21 drives the connecting rod 22 and the turning shaft 23 where the second clamping plate 52 is located to rotate, so that the angle between the second clamping plate 52 and the supporting slide plate 32 is small, so that the front frame of the loader can pass horizontally;

[0078] The front frame of the loader is laterally moved by the rail trolley and is located between a pair of support seat plates 71 through the second clamping plate 52;

[0079] The second motor 41 is started, and the support seat plate 71 is moved up and down through the second screw rod 43 until the positioning block 72 of the conical structure is inserted into the flange hole of the front frame of the loader; the first hydraulic cylinder 21 drives the connecting rod 22 and the turning shaft 23 where the second clamping plate 52 is located to rotate, so that the second clamping plate 52 is turned to a relative position with the first clamping plate 51, and after turning, it is buffered and positioned by the second hydraulic cylinder 61 and the positioning rod 62 in the positioning assembly; the first motor 34 is started, and the pair of support slide plates 32 are moved closer to each other through the first screw rod 31, until the first clamping plate 51 and the second clamping plate 52 respectively clamp and fix the lateral ends of the front frame of the loader, thereby completing the clamping of the entire front frame of the loader;

[0080] The rail trolley is moved out a certain distance and then connected to the front frame of the loader after welding is completed;

[0081] The flip assembly 20 drives the second clamping plate 52 to flip to leave space for the loader front frame to pass through, and the pair of supporting slide plates 32 and the pair of supporting seat plates 71 are moved relatively away from each other to complete the loosening of the loader front frame; the rail trolley moves the loader front frame out, and the next rail trolley moves the next loader front frame laterally to complete the sequential clamping and welding of multiple loader front frames in the production line.

[0082] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

Claims

1. The automatic clamping device for the front frame of the loader is characterized by: include: Supporting main board (10); The second clamping component (40) is located on the supporting main board (10) and has a pair of supporting seat plates (71) that are driven to move up and down respectively; each supporting seat plate (71) is provided with a positioning block (72) that matches the flange hole of the front frame of the loader; A first clamping component (30) is located on the supporting main board (10) and has a pair of supporting slide plates (32) that are driven to move laterally closer or farther away; A pair of support slides (32) are symmetrically located on both sides of a line connecting a pair of support base plates (71), one of the support slides (32) is provided with a first clamping plate (51), and the other support slide (32) is provided with a positioning assembly and a second clamping plate (52) driven to be flipped by a flipping assembly (20); The turning axis of the second clamping plate (52) is arranged transversely and rotationally, and under the drive of the turning assembly (20), the second clamping plate (52) turns over a certain angle, so that the front frame of the loader passes transversely and is located between a pair of supporting seat plates (71), and turns over to the position opposite to the first clamping plate (51) and contacts the positioning assembly.

2. The automatic clamping device for the front frame of a loader according to claim 1, characterized in that: The tilting assembly (20) comprises a first hydraulic cylinder (21) and a connecting rod (22); The first hydraulic cylinder (21) is rotatably mounted on the supporting slide plate (32), the telescopic end is rotatably connected to one end of the connecting rod (22), and the other end of the connecting rod (22) is fixedly connected to the turning shaft (23) where the second clamping plate (52) is located.

3. The automatic clamping device for the front frame of a loader according to claim 2, characterized in that: The positioning assembly comprises a second hydraulic cylinder (61) and a fixing seat (63) fixed on the supporting slide plate (32); The telescopic end of the second hydraulic cylinder (61) slides through the fixing seat (63) and faces the second clamping plate (52), and a positioning rod (62) facing the second clamping plate (52) is fixed on the fixing seat (63).

4. The automatic clamping device for the front frame of a loader according to any one of claims 1 to 3, characterized in that: The second clamping component (40) further comprises a pair of second screw rods (43); each second screw rod (43) is arranged vertically and threadedly connected to the support base plate (71), and one end of each second screw rod (43) is connected via a drive assembly; The support seat plate (71) is slidably connected to the support main plate (10) via a second slide rail (44).

5. The automatic clamping device for the front frame of a loader according to claim 4, characterized in that: The driving assembly comprises a second motor (41) and a gear assembly (42); The second motor (41) is fixed on the supporting main board (10), and the output end is connected to the input end of the gear assembly (42), and the output end of the gear assembly (42) is fixedly connected to the second screw rod (43).

6. The automatic clamping device for the front frame of a loader according to claim 5, characterized in that: The first clamping component (30) also has a first screw (31) with a transverse axis and arranged in a rotational manner; A pair of supporting slide plates (32) are respectively installed on the first screw rod (31) with threads in opposite directions to each other, and are slidably connected to the supporting main plate (10) via a first slide rail (33); One end of the first screw rod (31) is connected to the first motor (34).

7. The automatic clamping device for the front frame of a loader according to any one of claims 1 to 3, characterized in that: The positioning block (72) is a conical structure, and the cone angle faces the symmetry center.

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