Parallel clamping mechanism for welding of auxiliary frame support

Abstract

The invention belongs to the field of automobile chassis structural part welding clamps, and discloses an auxiliary frame support welding parallel clamping mechanism which comprises a base. The sliding rail assembly is fixedly connected with the base; a pushing air cylinder is installed on one side of the sliding rail assembly and provides driving force for the sliding rail assembly. The clamping air cylinder assembly is installed at the top of the sliding rail assembly and slides along with the sliding rail assembly, and the clamping air cylinder assembly advances or retreats; a parallel clamping assembly is arranged at the front end of the clamping air cylinder assembly and used for positioning the welding assembly, a clamping driving assembly is arranged at the rear end of the clamping air cylinder assembly, and the parallel clamping assembly is pre-clamped through the clamping driving assembly. The parallel clamping mechanism is reasonable in design, an opening limiting block is arranged in the parallel clamping mechanism, adjustment is convenient, clamping and loosening are achieved at the same time, the concentricity after welding is effectively guaranteed, the product size stability is improved, meanwhile, the clamp is simple in structure and convenient to maintain, and the production cost is saved.

Description

Technical Field

[0001] The invention relates to the field of welding fixtures for automobile chassis structural parts, and mainly relates to a parallel clamping mechanism for welding a sub-frame bracket. Background Art

[0002] Mid- to high-end cars often use multi-link rear suspensions, with one end of the control arm mounted on the steering knuckle and the other on the subframe. Since the steering knuckle is forged with high precision and stable dimensions, the swing arm mounting point on the subframe requires welding, which makes it difficult to ensure concentricity and control stability. Conventional welding fixture designs use cumbersome multi-body clamping mechanisms, such as a positioning and clamping mechanism on each side and an internal support mechanism at the opening limit. Due to errors in the early processing and assembly of the fixture, coupled with increased wear during later use, concentric errors will occur in the positioning and clamping mechanisms on both sides, seriously affecting the concentricity after welding. Bolt assembly is difficult or even impossible, reducing product quality and increasing the risk of outflow. Summary of the Invention

[0003] The purpose of the present invention is to make up for the defects of the existing technology and provide a parallel clamping mechanism for welding a subframe bracket. The parallel clamping mechanism has a built-in opening limit block, which is easy to adjust and can achieve clamping and loosening at the same time, effectively ensuring the concentricity after welding and improving the dimensional stability of the product. At the same time, the fixture structure is simple, maintenance is convenient, and production costs are saved.

[0004] The present invention is achieved through the following technical solutions: a sub-frame bracket welding parallel clamping mechanism includes a base;

[0005] The slide rail assembly is fixedly connected to the base; a propulsion cylinder is installed on one side of the slide rail assembly to provide driving force to the slide rail assembly;

[0006] The clamping cylinder assembly is installed on the top of the slide rail assembly. As the slide rail assembly slides, the clamping cylinder assembly moves forward or backward. The front end of the clamping cylinder assembly is provided with a parallel clamping assembly for positioning the welding assembly, and the rear end is provided with a clamping drive assembly, which pre-clamps the parallel clamping assembly through the clamping drive assembly.

[0007] According to the present invention, further, the clamping cylinder assembly includes a clamping cylinder, a clamping cylinder connecting block is installed on the end face of which; the clamping drive assembly includes a handle, which is connected to the clamping cylinder through a coupling connecting component, and the clamping state of the clamping cylinder is controlled by pulling the handle.

[0008] According to the present invention, further, the other end of the clamping cylinder is connected to a shell that accommodates a driving assembly, and the driving assembly is arranged in the shell. The driving assembly combines X-direction and Y-direction movement; the driving assembly is connected to the handle, and the driving assembly is connected to the clamping driving assembly in the Y-direction movement direction. The clamping driving assembly includes two symmetrical positioning pins arranged at the far end. The driving assembly moves away from each other in the Y-direction, the two positioning pins move away from each other, the driving assembly moves relative to each other in the Y-direction, and the two positioning pins move relative to each other to clamp the workpiece to be processed.

[0009] According to the present invention, further, upper and lower connecting block fixing plates are fixed on the opposite side surfaces of the outer periphery of the shell, and the upper and lower connecting block fixing plates are formed with slots connected to the interior of the shell, and the slots point to the side away from the clamping cylinder; the clamping drive assembly also includes an L-block, one end of the L-block is embedded in the slot and connected to the Y-direction sliding drive assembly, and the other end of the L-block is located on the side surface of the shell accommodating the drive assembly away from the clamping cylinder, and an open-gear connecting block is provided between the two L-blocks to provide a clamping reference for the workpiece to be processed.

[0010] According to the present invention, further, the cross-section of the opening connecting block is "T"-shaped, the horizontal part is fitted with the side surface of the shell accommodating the driving assembly away from the clamping cylinder, and the vertical part extends to the far front end, and L-block connecting blocks are symmetrically arranged on both sides of the vertical part, and the vertical part of the L-block connecting block is fitted and fixedly connected with the vertical part of the L-block, and the top surface of the horizontal part of the L-block connecting block is connected to the positioning pin connecting block, and the front end of the positioning pin connecting block is connected to the positioning pin, and a space for accommodating the welding assembly is formed between the two positioning pins, and the opening limit blocks are respectively fixed on the two side surfaces of the vertical part of the opening connecting block, and are located below the positioning pin to perform opening limit.

[0011] According to the present invention, further, the shell includes a lower shell and an upper shell partially engaged with it, a lower connecting block is provided on the side of the top surface of the lower shell close to the clamping cylinder, and an upper connecting block matching its size and position is provided on the bottom surface of the upper shell; the upper connecting block and the lower connecting block are fixedly connected; a guide groove is provided on the top surface of the lower shell, a sliding positioning pin is matched and connected in the guide groove, a driving block is matched and connected on the sliding positioning pin, and one end of the driving block is connected to the output end of the clamping cylinder.

[0012] According to the present invention, further, the driving block is an equilateral triangle, and its two inclined surfaces are slidably connected to the side driving blocks. As the driving block moves along the X direction, the two side driving blocks slide in the Y direction, and the two side end faces of the two side driving blocks are respectively fixedly connected to the horizontal parts of the L blocks on the corresponding sides.

[0013] According to the application, further, the handle intermediate position is coupled with a handle upper connecting block and the bottom is coupled with a handle lower connecting block, the handle upper connecting block is connected with the clamping air cylinder through a handle upper driving block, the handle lower connecting block is connected with the clamping air cylinder connecting block, the push-pull handle swings at the bottom end relative to the coupling point of the handle and the handle lower connecting block, the handle upper driving block drives the clamping air cylinder to move, and manual pre-clamping is realized.

[0014] According to the application, further, the slide rail assembly comprises a bottom plate fixed with the base, one side of the bottom plate is fixedly connected with the advancing air cylinder, and the top surface of the bottom plate is fixedly provided with two parallel slide rails and a sliding block matched with the slide rails to slide, and the sliding block is fixedly connected with the clamping air cylinder.

[0015] According to the application, further, the bracket profile support block is arranged on the bracket profile support block base and is symmetrically arranged about the vertical part of the open-slot connecting block, the open-slot connecting block is provided with a bracket detection sensor for detecting leakage of the welding bracket, the top surface of the bracket profile support block is an inclined surface, and the upper virtual extension surfaces of the two inclined surfaces intersect.

[0016] Compared with the prior art, the application has the following beneficial effects: the parallel clamping mechanism is rationally designed, the built-in open-slot limiting block is convenient to adjust, clamping and loosening are simultaneously realized, the concentricity after welding is effectively ensured, the product size stability is improved, the clamp structure is simple, maintenance is convenient, and production cost is saved.

[0017] The bracket profile support block is arranged to provide support force for the workpiece to be machined, and the workpiece stability in the machining process is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic view of the parallel clamping mechanism for welding the sub-frame bracket of the application;

[0019] Figure 2a It is a schematic view of the slide rail assembly of the parallel clamping mechanism for welding the sub-frame bracket of the application;

[0020] Figure 2b It is a schematic view of the slide rail assembly of the parallel clamping mechanism for welding the sub-frame bracket of the application (not including the protection plate, the sliding block connecting block and the air cylinder assembly connecting block);

[0021] Figure 3a It is a schematic view of the clamping air cylinder assembly of the parallel clamping mechanism for welding the sub-frame bracket of the application;

[0022] Figure 3b It is a schematic view of the driving assembly and the lower shell assembly of the parallel clamping mechanism for welding the sub-frame bracket of the application;

[0023] Figure 3c This is a schematic diagram of the assembly of the lower housing and the sliding positioning pin of the parallel clamping mechanism for welding the sub-frame bracket of the present invention;

[0024] Figure 4 Schematic diagram of the welding assembly of the clamping mechanism of the present invention.

[0025] Figure 1: Base 1, propulsion cylinder 2, slide rail assembly 3, propulsion cylinder connecting block 3-1, protective plate 3-2, slide rail 3-3, slider 3-4, slider connecting block 3-5, cylinder assembly connecting block 3-6, propulsion cylinder joint 3-7, propulsion cylinder joint connecting block 3-8, bottom plate 3-9, clamping cylinder assembly 4, handle 4-1, handle upper connecting block 4-2, handle upper drive block 4-3, handle lower connecting block 4-4, clamping cylinder connecting block 4-5, clamping cylinder 4-6, upper connecting block 4-7, lower Connecting block 4-8, upper and lower connecting block fixing plate 4-9, L block 4-10, L block connecting block 4-11, positioning pin connecting block 4-12, positioning pin 4-13, bracket profile support block base 4-14, bracket profile support block 4-15, opening limit block 4-16, opening connecting block 4-17, bracket detection sensor 4-18, upper and lower connecting block positioning pins 4-19, drive block 4-20, sliding positioning pin 4-21, side drive block 4-22, welding assembly 5, longitudinal tube 5-1, bracket 5-2. DETAILED DESCRIPTION

[0026] To make the present invention more clearly understood, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0027] See also Figure 1 , which is a schematic diagram of the assembly of a parallel clamping mechanism for welding a sub-frame bracket; the present invention provides a parallel clamping mechanism for welding a sub-frame bracket, comprising a base 1 as a support, on which a slide rail assembly 3 is installed, a propulsion cylinder 2 is installed on one side of the slide rail assembly 3, which provides driving force to the slide rail assembly 3, a clamping cylinder assembly 4 is installed on the top of the slide rail assembly 3, and the slide rail assembly 3 drives the clamping cylinder assembly 4 to move forward or backward, a parallel clamping assembly is provided at the front end of the clamping cylinder assembly 4 for positioning the welding assembly 5, and a clamping drive assembly is provided at the rear end, and the pre-clamping of the parallel clamping assembly is controlled by the clamping drive assembly.

[0028] Specifically, see Figure 2a and 2b, is an assembly diagram of the slide rail assembly; the slide rail assembly 3 includes a bottom plate 3-9 fixed to the base 1, and a propulsion cylinder connecting block 3-1 for connecting to the propulsion cylinder 2 is integrally provided on one side of the bottom plate 3-9, and two parallel slide rails 3-3 and a slider 3-4 that slides with them are fixed on the top surface of the bottom plate 3-9, and a slider connecting block 3-5 is fixedly connected to the top surface of the slider 3-4, on which a cylinder assembly connecting block 3-6 is provided, and a propulsion cylinder joint 3-7 is provided between the two slide rails 3-3, and a propulsion cylinder joint connecting block 3-8 is installed at the end of the propulsion cylinder joint 3-7 away from the propulsion cylinder connecting block 3-1; it also includes a "U"-shaped protective plate 3-2 with a downward opening, which covers the propulsion cylinder joint 3-7 and the propulsion cylinder joint connecting block 3-8 in the U-shaped cavity, and one side of the protective plate 3-2 is fixedly connected to the cylinder assembly connecting block 3-6.

[0029] See also Figure 3a 、 3bAnd 3c, as the schematic diagram of clamping cylinder assembly; Clamping cylinder assembly 4 contains clamping cylinder 4-6, its end face is equipped with clamping cylinder connecting block 4-5, clamping cylinder connecting block 4-5 is plate-shaped, the side is also provided with handle 4-1, handle 4-1 is coupled and connected with handle upper connecting block 4-2 in the middle position, is coupled and connected with handle lower connecting block 4-4 at the bottom, handle upper connecting block 4-2 is connected with clamping cylinder 4-6 by handle upper drive block 4-3 through clamping cylinder connecting block 4-5, handle lower connecting block 4-4 is connected with clamping cylinder connecting block 4-5, push-pull handle 4-1, its bottom end oscillates relative to the coupling point of handle 4-1 and handle lower connecting block 4-4, handle upper drive block 4-3 drives clamping cylinder 4-6 to move, realizes manual pre-clamping;Clamping cylinder 4-6 the other end is connected with the shell containing drive assembly, the shell includes lower shell and the upper shell buckled with it, the outer circumferential opposite side surface of the two is fixed with upper and lower connecting block fixed plate 4-9, upper and lower connecting block fixed plate 4-9 is formed with notch, the notch points to the side away from clamping cylinder 4-6, the notch is embedded in L block 4-10, the vertical part of L block 4-10 is located on the side surface of the shell containing drive assembly away from clamping cylinder 4-6, two L blocks 4-10 are provided with opening connecting block 4-17 in the middle, the cross section of opening connecting block 4-17 is "T" type, the horizontal part is attached to the side surface of the shell containing drive assembly away from clamping cylinder 4-6, the vertical part extends to the distal end front end, the vertical part is symmetrically provided with L block connecting block 4-11 about both sides, the vertical part of L block connecting block 4-11 is fixedly connected with the vertical part of L block 4-10, the horizontal part of L block connecting block 4-11 is connected with positioning pin connecting block 4-12 on the top surface, positioning pin 4-13 is connected at the front end of positioning pin connecting block 4-12, the space containing welding assembly 5 is formed between two positioning pins 4-13, the support 5-2 of welding assembly is embedded in the space, and it is fixed by two positioning pins 4-13, opening limiting block 4-16 is fixed on the two side surfaces of the vertical part of opening connecting block 4-17 respectively, located below positioning pin 4-13, and opening limiting is carried out.

[0030] In order to support welding assembly 5, provide support force, set up bracket profile support block base 4-14 at the bottom of opening connecting block 4-17, set up bracket profile support block 4-15 on the top surface of bracket profile support block base 4-14, bracket profile support block 4-15 is symmetrically arranged about the vertical part of opening connecting block 4-17, opening connecting block 4-17 is provided with bracket detection sensor 4-18, bracket detection sensor 4-18 is inserted in opening connecting block 4-17, which is used for detecting welding support leak-proof;Preferably, the top surface of bracket profile support block 4-15 is inclined, and the virtual extension surfaces above the two inclined surfaces intersect.

[0031] Among them, a lower connecting block 4-8 ​​is provided on one side of the top surface of the lower shell of the shell accommodating the drive assembly, close to the clamping cylinder 4-6, and correspondingly, an upper connecting block 4-7 matching its size and position is provided on the bottom surface of the upper shell; the upper connecting block 4-7 and the lower connecting block 4-8 ​​are fixedly connected by upper and lower connecting block positioning pins 4-19; a guide groove is provided on the top surface of the lower shell, and a sliding positioning pin 4-21 is connected in the guide groove, and the drive block 4-20 is matched with the sliding positioning pin 4-21, and one end of the drive block 4-20 is connected to the output end of the clamping cylinder 4-6; the drive block 4-20 is an equilateral triangle, and its two oblique surfaces are fitted and slidably connected with the side drive block 4-22, and as the drive block 4-20 The drive moves forward, and the driving blocks 4-22 on both sides slide to the left and right, that is, the driving block 4-20 moves along the X direction, and the side driving block 4-22 slides along the Y direction. The end faces of the driving blocks 4-22 on both sides are fixedly connected to the horizontal parts of the L blocks 4-10 on the corresponding sides, and the driving block 4-20 moves toward the front end, and the driving blocks 4-22 on both sides move back to back. The movement is transmitted to the positioning pin 4-13 through the connection assembly composed of the L block 4-10, the L block connecting block 4-11, and the positioning pin connecting block 4-12, so that the two positioning pins 4-13 are relatively far away from each other. Conversely, the driving block 4-20 moves toward the rear end, and the driving blocks 4-22 on both sides move toward each other, so that the two positioning pins 4-13 are relatively close to each other, clamping the bracket 5-2.

[0032] See also Figure 4 , is a schematic diagram of the welding assembly 5; the welding assembly 5 comprises a longitudinal tube 5-1 and a bracket 5-2, and the bracket 5-2 is fixed by two positioning pins 4-13 to achieve clamping and positioning of the welding assembly 5.

[0033] The working principle of the present invention is:

[0034] Through the design of the above-mentioned parallel clamping mechanism, the buttons are started with both hands to push the cylinder 2 to operate, so that the clamping cylinder assembly 4 slides into the corresponding position along the guide rail, the bracket 5-2 is pre-positioned and installed along the positioning pin 4-13, and the handle 4-1 is pulled to manually pre-clamp the welding workpiece. Then the buttons are started with both hands to clamp the clamping cylinder 4-6 and start the welding button. After the welding is completed, the clamping cylinder 4-6 is operated to release the positioning pins 4-13 on both sides at the same time, and then the cylinder 2 is pushed to operate to make the clamping cylinder assembly 4 return to its original position along the guide rail and take out the sample.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Parallel clamping mechanism for welding of sub-frame bracket, characterized in that: include, base; The slide rail assembly is fixedly connected to the base; a propulsion cylinder is installed on one side of the slide rail assembly to provide driving force to the slide rail assembly; The clamping cylinder assembly is installed on the top of the slide rail assembly. As the slide rail assembly slides, the clamping cylinder assembly moves forward or backward. The front end of the clamping cylinder assembly is provided with a parallel clamping assembly for positioning the welding assembly, and the rear end is provided with a clamping drive assembly, which pre-clamps the parallel clamping assembly through the clamping drive assembly.

2. The parallel clamping mechanism for welding a subframe bracket according to claim 1, characterized in that: The clamping cylinder assembly includes a clamping cylinder, the end face of which is equipped with a clamping cylinder connecting block; the clamping drive assembly includes a handle, which is connected to the clamping cylinder through a coupling connecting component. By pulling the handle, the clamping state of the clamping cylinder is controlled.

3. The parallel clamping mechanism for welding a subframe bracket according to claim 2, characterized in that: The other end of the clamping cylinder is connected to a shell that accommodates a driving assembly. The driving assembly is arranged in the shell, and the driving assembly combines X-direction and Y-direction movement; the driving assembly is connected to the handle, and the driving assembly is connected to the clamping driving assembly in the Y-direction movement direction. The clamping driving assembly includes two symmetrical positioning pins arranged at the far end. The driving assembly moves away from each other in the Y-direction, the two positioning pins move away from each other, the driving assembly moves relative to each other in the Y-direction, and the two positioning pins move relative to each other to clamp the workpiece to be processed.

4. The parallel clamping mechanism for welding a subframe bracket according to claim 3, characterized in that: Upper and lower connecting block fixing plates are fixed to the opposite side surfaces of the outer periphery of the shell, and the upper and lower connecting block fixing plates are formed with slots connected to the interior of the shell, and the slots point to the side away from the clamping cylinder; the clamping drive assembly also includes an L-block, one end of the L-block is embedded in the slot and connected to the Y-direction sliding drive assembly, and the other end of the L-block is located on the side surface of the shell accommodating the drive assembly away from the clamping cylinder, and an open-gear connecting block is provided between the two L-blocks to provide a clamping reference for the workpiece to be processed.

5. The parallel clamping mechanism for welding a sub-frame bracket according to claim 4, characterized in that: The cross-section of the opening connecting block is "T"-shaped, the horizontal part is fitted with the side surface of the shell accommodating the driving assembly away from the clamping cylinder, the vertical part extends to the far front end, and L-block connecting blocks are symmetrically arranged on both sides of the vertical part. The vertical part of the L-block connecting block is fitted and fixedly connected with the vertical part of the L block, the top surface of the horizontal part of the L-block connecting block is connected to the positioning pin connecting block, and the front end of the positioning pin connecting block is connected to the positioning pin, and a space for accommodating the welding assembly is formed between the two positioning pins. The opening limit blocks are respectively fixed on the two side surfaces of the vertical part of the opening connecting block, and are located below the positioning pin to limit the opening.

6. The parallel clamping mechanism for welding a subframe bracket according to claim 3, characterized in that: The shell includes a lower shell and an upper shell partially engaged with it. A lower connecting block is provided on the side of the top surface of the lower shell close to the clamping cylinder, and an upper connecting block matching its size and position is provided on the bottom surface of the upper shell; the upper connecting block and the lower connecting block are fixedly connected; a guide groove is provided on the top surface of the lower shell, and a sliding positioning pin is matched and connected in the guide groove, and a driving block is matched and connected on the sliding positioning pin, and one end of the driving block is connected to the output end of the clamping cylinder.

7. The parallel clamping mechanism for welding a sub-frame bracket according to claim 6, characterized in that: The driving block is an equilateral triangle, and its two inclined surfaces are slidably connected to the side driving blocks. As the driving block moves along the X direction, the two side driving blocks slide in the Y direction, and the two side end faces of the two side driving blocks are respectively fixedly connected to the horizontal part of the L block on the corresponding side.

8. The parallel clamping mechanism for welding a sub-frame bracket according to claim 2, characterized in that: The middle position of the handle is coupled with an upper connecting block of the handle, and the bottom is coupled with a lower connecting block of the handle. The upper connecting block of the handle passes through the clamping cylinder connecting block and is connected to the clamping cylinder through the upper driving block of the handle. The lower connecting block of the handle is connected to the clamping cylinder connecting block. When the handle is pushed and pulled, its bottom end swings relative to the coupling point between the handle and the lower connecting block of the handle, and the upper driving block of the handle drives the clamping cylinder to move, thereby realizing manual pre-clamping.

9. The parallel clamping mechanism for welding a sub-frame bracket according to claim 1, characterized in that: The slide rail assembly includes a bottom plate fixed to the base, one side of the bottom plate is fixedly connected to the propulsion cylinder, the top surface of the bottom plate is fixedly provided with two parallel slide rails and a slider that slides therewith, and the top surface of the slider is fixedly connected to the clamping cylinder.

10. The parallel clamping mechanism for welding a sub-frame bracket according to claim 4, characterized in that: It also includes a frame-shaped surface support block base arranged at the bottom of the open-gutter connecting block. The bracket-shaped surface support block is arranged on the frame-shaped surface support block base and is symmetrically arranged about the vertical part of the open-gutter connecting block. A bracket detection sensor is arranged on the open-gutter connecting block for detecting leakage of the welded bracket; the top surface of the bracket-shaped surface support block is an inclined surface, and the upper virtual extended surfaces of the two inclined surfaces intersect.

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