Automatic clamp for machining whole component of CRH2 bullet train body

Abstract

The invention discloses an automatic clamp for machining a CRH2 motor car body integral component, and relates to the technical field of mechanical manufacturing, the automatic clamp for machining the CRH2 motor car body integral component comprises a placing platform, a car body frame is placed on the top of the placing platform, and a fixing frame is fixedly connected to the lower surface of the car body frame; a moving mechanism capable of providing a clamping function at each position of the surface of the placing platform is arranged in the placing platform, a pressure mechanism for reducing vibration and deformation of the fixing frame in the machining process is arranged in the placing platform, and a limiting mechanism facilitating disassembly of the moving mechanism is arranged in the placing platform; and the extending abutting blocks are driven to be separated from the interiors of the adjacent limiting tooth blocks, so that connection and fixation between the moving frame and the containing platform are relieved, the problem that the clamping force distribution is uneven due to the fact that the position of the clamping mechanism cannot be adjusted is solved, and the moving mechanism is adjusted to the optimal position to ensure that the clamping force is evenly distributed.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical manufacturing, and specifically to an automated fixture for processing the integral components of a CRH2 train car body. Background Art

[0002] With the rapid development of high-speed railways, as an important railway transportation vehicle, the processing quality and production efficiency of the integral components of a CRH2 train car body are crucial for the performance and safety of the train. In the traditional processing process, manual fixtures are usually used to fix the integral components of the car body. This method is affected by the skill level and experience of the operators, which easily leads to processing errors and affects the quality of the integral components of the car body. In order to improve the processing quality and production efficiency of the integral components of a CRH2 train car body, automated fixtures have emerged. By providing a stable clamping force and precise positioning, the influence of human factors on the processing accuracy is reduced, thereby improving the quality of the integral components of the car body.

[0003] During the current use of the equipment, there are still many inconveniences; The specific defects are as follows: First, the size of the CRH2 train car body is fixed. However, during the processing, due to factors such as processing errors and material deformation, the size of the integral components of the car body changes slightly. Usually, the position of the clamping mechanism inside the fixture is not adjustable, resulting in the clamping mechanism being unable to adapt to the size change of the train car body. As a result, the train car body cannot fit the surface of the clamping mechanism. Since the position of the clamping mechanism inside the fixture is fixed, it can only apply a clamping force at a specific position. If the shape of the component is irregular or the size changes, it is impossible to ensure the uniform distribution of the clamping force, which will affect the processing accuracy and quality.

[0004] Second, during the long-term use of the fixture, the clamping mechanism will be worn and damaged, affecting the clamping effect and processing accuracy. In order to ensure the stability of the clamping process, the existing clamping mechanism is fixed on the surface of the placement table, resulting in the clamping mechanism being not easy to replace. When the clamping mechanism fails or is damaged, the difficulty in replacement will lead to an extended repair time, increased repair costs, thus affecting the production schedule and causing production delays. Moreover, the not-easy-to-replace clamping mechanism limits the flexibility and versatility of the fixture. In order to adapt to integral components of the car body with different shapes or sizes, it is necessary to redesign and manufacture the fixture, increasing the cost and time.

[0005] Therefore, the present invention proposes an automated fixture for processing the integral components of a CRH2 train car body to make up for and improve the deficiencies of the existing technology. Summary of the Invention

[0006] (1) Technical Problems to be Solved In view of the deficiencies of the prior art, the present invention provides an automated fixture for processing the overall components of a CRH2 train car body, which solves the problems that the uneven distribution of the clamping force is caused by the inability to adjust the position of the clamping mechanism and the production efficiency is affected by the difficulty of disassembling the clamping mechanism as mentioned in the above background art.

[0007] (II) Technical Solution To achieve the above objectives, the present invention is realized through the following technical solutions: an automated fixture for processing the overall components of a CRH train car body, including a placement platform. A car body frame is placed on the top of the placement platform. A fixed frame is fixedly connected to the lower surface of the car body frame. A moving mechanism capable of providing a clamping function at various positions on the surface of the placement platform is provided inside the placement platform. A pressure mechanism for reducing the vibration and deformation of the fixed frame during the processing is provided inside the placement platform. A limiting mechanism for facilitating the disassembly of the moving mechanism is provided inside the placement platform.

[0008] Preferably, the moving mechanism includes two moving frames. Two sliding grooves are opened on the upper surface of the placement platform. Both of the two moving frames are slidably connected to the inside of the sliding grooves on the surface of the placement platform. A plurality of limiting tooth blocks are fixedly connected to the inside of the sliding grooves on the surface of the placement platform. A movable clamping block is slidably connected to the upper surface of the moving frame. A power gear is rotatably connected to the upper surface of the moving frame. A tooth block is fixedly connected to the inner wall of the movable clamping block. The power gear meshes with the tooth block on the inner wall of the movable clamping block. A connecting push rod is slidably connected to the inside of the moving frame. One end of the connecting push rod is fixedly connected to a top surface dial block. An extending abutting block is slidably connected to the inside of the moving frame. The extending abutting block is slidably connected between adjacent limiting tooth blocks. An adjustment groove is opened on the surface of the extending abutting block. Switching shafts are fixedly connected to both ends of the surface of the top surface dial block. The switching shafts are slidably connected to the inside of the adjustment groove on the surface of the extending abutting block. An adjustment shaft is slidably connected to the surface of the moving frame. The adjustment shaft is fixedly connected to the upper surface of one end of the connecting push rod. A first spring is fixedly connected to the inside of the moving frame. Block surfaces are fixedly connected to both sides of the connecting push rod. The block surfaces on both sides of the connecting push rod are fixedly connected to the first spring. A fixed clamping block is fixedly connected to the upper surface of the moving frame. The fixed frame is located between the fixed clamping block and the movable clamping block.

[0009] Preferably, rubber pads with rough surfaces are fixedly connected to both the power gear and the side of the fixed clamping block close to the fixed frame.

[0010] Preferably, the sliding distance of the extending abutting block is greater than the length of the extending abutting block extending between adjacent limiting tooth blocks.

[0011] Preferably, the pressure mechanism includes a fitting slider which is slidably connected to the inside of the moving frame. A power slider is slidably connected to the inner wall of the adjusting shaft. A second spring is fixedly connected to the bottom of the inner wall of the moving frame and is fixedly connected to the power slider. The fitting slider is slidably connected to the inside of the power slider. A third spring is fixedly connected to the inner wall of the power slider and is fixedly connected to the fitting slider. An adjusting clamping shaft is fixedly connected to the surface of the inner wall of the moving frame. A downward pressing push rod is rotatably connected to the surface of the power slider. A V-shaped groove is formed on the surface of the downward pressing push rod. The adjusting clamping shaft is located inside the V-shaped groove on the surface of the downward pressing push rod.

[0012] Preferably, a rubber pad is fixedly connected to the lower surface of one end of the power slider. The sliding distance of the adjusting clamping shaft inside the V-shaped groove of the downward pressing push rod is greater than the sliding distance of the fitting slider inside the power slider.

[0013] Preferably, the stiffness coefficient of the third spring is greater than that of the second spring.

[0014] Preferably, the limiting mechanism includes a stop surface slider which is slidably connected to the surface of the moving frame. A switching slider is slidably connected to the inside of the moving frame. A fifth spring is fixedly connected to the inside of the moving frame and is fixedly connected to the switching slider. An extending sliding rod is fixedly connected to the surface of the stop surface slider. A clamping groove is formed on the surface of the switching slider. The extending sliding rod is slidably connected to the inside of the clamping groove on the surface of the switching slider. A limiting clamping block is fixedly connected to the lower surface of one end of the extending sliding rod. A power sliding rod is slidably connected to the inside of the moving frame. A transmission sliding rod is slidably connected to the inside of the moving frame. Restoration blocks are fixedly connected to both sides of the transmission sliding rod. A fourth spring is fixedly connected to the inside of the moving frame and is fixedly connected to the restoration block on the surface of the transmission sliding rod.

[0015] Preferably, inclined surfaces are provided at one ends of both the power sliding rod and the transmission sliding rod. The inclined surfaces of the power sliding rod and the transmission sliding rod are in contact with each other. The inclined surface of the power sliding rod extends into the sliding path of the moving frame. Inclined surfaces are provided at one ends of both the switching slider and the limiting clamping block. The inclined surface of the switching slider is located inside the sliding path of the transmission sliding rod.

[0016] (III) Beneficial effects The automatic fixture for processing the overall components of the CRH2 EMU car body provided by the present invention has the following beneficial effects: 1. By using the cooperation of the fixed frame and the moving mechanism, the extended abutting block is driven to disengage from the inside of the adjacent limiting tooth block, thereby releasing the connection and fixation between the moving frame and the placement platform. Then, the moving frame is pushed to drive the left surface of the extended abutting block to fit against the right surface of the fixed frame. Next, the tooth block on the upper surface of the moving frame pushes the movable clamping block to slide to the left, and then the fixed frame between the movable clamping block and the fixed clamping block is clamped, solving the problem that the position of the clamping mechanism cannot be adjusted, resulting in uneven distribution of the clamping force. It can adjust the moving mechanism to the optimal position according to the shape and size of the component to ensure uniform distribution of the clamping force, improve the clamping effect, reduce the deformation and displacement of the component during the processing, and can quickly adjust the position of the moving mechanism to adapt to different processing tasks, reducing the time and workload of replacing the fixture and improving the production efficiency.

[0017] 2. By using the cooperation of the moving mechanism and the pressure mechanism, a downward thrust is given to the fixed frame by pressing down the push rod, reducing the vibration and displacement of the vehicle body frame during the clamping process, thereby improving the processing accuracy. By giving a downward thrust to the clamping part, the stability and uniformity of the clamping force can be increased, the occurrence of vibration and deformation can be reduced, the processing accuracy and surface quality can be improved, and the stability and uniformity of the clamping force can ensure that the overall components of the EMU vehicle body will not loosen or fall off during the processing, avoiding the occurrence of safety accidents.

[0018] 3. By using the cooperation of the moving mechanism and the limiting mechanism, the clamping relationship between the extended sliding rod and the switching slider is released by aligning the clamping groove on the surface of the switching slider. By pushing the stop surface slider to slide away from the switching slider, an opening is provided for the moving frame, and then the moving frame can be taken out from the inside of the placement platform for maintenance and replacement, solving the problem that the moving mechanism is not easy to disassemble from the inside of the placement platform, which affects the production efficiency. The moving mechanism is easy to disassemble, which can facilitate maintenance and repair, reduce the downtime, and improve the production efficiency. And the clamping mechanism is easy to disassemble, which can facilitate cleaning and maintenance, and extend the service life of the clamping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a schematic diagram of the position distribution of each mechanism of the present invention; Figure 4 It is a schematic diagram of the overall structure of the moving mechanism of the present invention; Figure 5 It is a schematic diagram of the internal structure of the moving mechanism of the present invention; Figure 6 For the present invention Figure 5 Partial enlarged view of A in Figure 7 Schematic diagram of the overall structure of the pressure mechanism of the present invention; Figure 8 For the present invention Figure 7 Partial enlarged view of B in; Figure 9 Schematic diagram of the overall structure of the limiting mechanism of the present invention; Figure 10 For the present invention Figure 9 Partial enlarged view of C in.

[0020] The reference numerals in the figure respectively represent: 1, vehicle body frame; 2, placement platform; 3, fixed frame; 4, moving mechanism; 411, moving frame; 412, adjusting shaft; 413, movable clamping block; 414, power gear; 415, connecting push rod; 416, first spring; 417, limiting tooth block; 418, top surface dialing block; 419, switching shaft; 4110, extending abutting block; 4111, fixed clamping block; 5, pressure mechanism; 511, fitting slider; 512, downward pressing push rod; 513, power slider; 514, second spring; 515, adjusting clamping shaft; 516, third spring; 6, limiting mechanism; 611, blocking surface slider; 612, switching slider; 613, power sliding rod; 614, transmission sliding rod; 615, fourth spring; 616, limiting clamping block; 617, fifth spring; 618, extending sliding rod. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Refer to Figures 1 to 10 , an automated fixture for machining the overall components of a CRH2 EMU vehicle body according to a preferred embodiment of the present invention will be elaborated in detail below. An automated fixture for machining the overall components of a CRH2 EMU vehicle body includes a placement platform 2. A vehicle body frame 1 is placed on the top of the placement platform 2. A fixed frame 3 is fixedly connected to the lower surface of the vehicle body frame 1. A moving mechanism 4 capable of providing a clamping function at various positions on the surface of the placement platform 2 is arranged inside the placement platform 2. A pressure mechanism 5 for reducing the vibration and deformation of the fixed frame 3 during the machining process is arranged inside the placement platform 2. A limiting mechanism 6 for facilitating the disassembly of the moving mechanism 4 is arranged inside the placement platform 2.

[0023] AsFigure 3 , Figure 4 , Figure 5 and Figure 6 as shown, in Figure 4 , the moving mechanism 4 includes two moving frames 411. Two sliding grooves are provided on the upper surface of the placing platform 2. Both of the two moving frames 411 are slidably connected to the inside of the sliding grooves on the surface of the placing platform 2. As in Figure 5 , a plurality of limiting tooth blocks 417 are fixedly connected to the inside of the sliding grooves on the surface of the placing platform 2. A connecting push rod 415 is slidably connected to the inside of the moving frame 411. A first spring 416 is fixedly connected to the inside of the moving frame 411. Both sides of the connecting push rod 415 are fixedly connected with stop surface blocks. The stop surface blocks on both sides of the connecting push rod 415 are fixedly connected to the first spring 416. An adjusting shaft 412 is slidably connected to the surface of the moving frame 411. The adjusting shaft 412 is fixedly connected to the upper surface of one end of the connecting push rod 415. Due to machining errors, when the dimensions of the overall components of the vehicle body change slightly and the position of the moving mechanism 4 on the surface of the placing platform 2 needs to be adjusted, a leftward thrust is given to the adjusting shaft 412 by manual pushing, thereby driving the connecting push rod 415 at the bottom of the adjusting shaft 412 to slide leftward. At this time, the first spring 416 is compressed under the push of the stop surface blocks on both sides of the connecting push rod 415. As in Figure 6 , a top surface dial block 418 is fixedly connected to one end of the connecting push rod 415. An extended abutting block 4110 is slidably connected to the inside of the moving frame 411. The extended abutting block 4110 is slidably connected between adjacent limiting tooth blocks 417. An adjusting groove is provided on the surface of the extended abutting block 4110. Switching shafts 419 are fixedly connected to both ends of the surface of the top surface dial block 418. The switching shafts 419 are slidably connected to the inside of the adjusting groove on the surface of the extended abutting block 4110. The top surface dial block 418 slides leftward under the push of the connecting push rod 415. A thrust in the direction of the connecting push rod 415 is given to the inner wall of the adjusting groove of the extended abutting block 4110 by the switching shafts 419 on the lower surfaces of both ends of the top surface dial block 418, pushing the extended abutting block 4110 to slide in the direction of the connecting push rod 415, thereby driving the extended abutting block 4110 to disengage from the gap between the adjacent limiting tooth blocks 417 on the surface of the fixed frame 3, thus releasing the connection relationship between the moving frame 411 and the placing platform 2. As in Figure 5 , a movable clamping block 413 is slidably connected to the upper surface of the moving frame 411. A power gear 414 is rotatably connected to the upper surface of the moving frame 411. A tooth block is fixedly connected to the inner wall of the movable clamping block 413. The power gear 414 meshes with the tooth block on the inner wall of the movable clamping block 413. A fixed clamping block 4111 is fixedly connected to the upper surface of the moving frame 411. As in Figure 3Among them, the fixed frame 3 is located between the fixed clamping block 4111 and the movable clamping block 413. The connection between the moving frame 411 and the placement platform 2 is released. Manually push the moving frame 411 to slide, thereby driving the right side wall of the fixed clamping block 4111 to fit against the left side wall of the fixed frame 3. At this time, the manual thrust on the adjusting shaft 412 is released. The connecting push rod 415 slides to the right under the thrust provided by the restoration of the first spring 416, and then gives a thrust to the inner wall of the inclined groove of the extending abutting block 4110 through the switching shaft 419 on the surface of the top surface dial block 418, pushing the extending abutting block 4110 to slide away from the connecting push rod 415, and re-entering the gap between the adjacent limiting tooth blocks 417, thereby fixing the moving frame 411 on the surface of the placement platform 2. At this time, the power gear 414 is driven to rotate by the motor output shaft, and the movable clamping block 413 is pushed to slide to the left through the tooth block on the upper surface of the moving frame 411, thereby clamping the fixed frame 3 between the movable clamping block 413 and the fixed clamping block 4111, ensuring that the clamping force provided by the moving mechanism 4 is evenly distributed and improving the clamping effect on the fixed frame 3.

[0024] As Figure 7 and Figure 8 shown, as Figure 8 in, the pressure mechanism 5 includes a fitting slider 511. The fitting slider 511 is slidably connected to the inside of the moving frame 411. One end of the fitting slider 511 is provided with an inclined surface. A power slider 513 is slidably connected to the inner wall of the adjusting shaft 412. A second spring 514 is fixedly connected to the bottom of the inner wall of the moving frame 411. The second spring 514 is fixedly connected to the power slider 513. The fitting slider 511 is slidably connected to the inside of the power slider 513. A third spring 516 is fixedly connected to the inner wall of the power slider 513. The third spring 516 is fixedly connected to the fitting slider 511. During the process of adjusting the right side wall of the fixed clamping block 4111 to fit against the left side wall of the fixed frame 3, the fixed frame 3 contacts the inclined surface of the fitting slider 511 and gives a thrust to the inclined surface of the fitting slider 511 to push the fitting slider 511 to slide downward, and the power slider 513 is pushed to slide downward along the right side of the inner wall of the moving frame 411 through the third spring 516 at the bottom of the fitting slider 511. At this time, the second spring 514 is compressed under the push of the power slider 513, as Figure 8Inside, an adjusting clamping shaft 515 is fixedly connected to the inner wall surface of the moving frame 411. The surface of the power slider 513 is rotatably connected to a downward pressing push rod 512. The downward pressing push rod 512 is composed of a bent part and a horizontal part. A rubber pad is fixedly connected to the lower surface of the horizontal part of the downward pressing push rod 512. A V-shaped groove is formed on the surface of the downward pressing push rod 512. The V-shaped groove on the surface of the downward pressing push rod 512 is composed of a vertical groove and an inclined groove. The adjusting clamping shaft 515 is located inside the V-shaped groove on the surface of the downward pressing push rod 512. The downward pressing push rod 512 slides downward under the drive of the power slider 513. At this time, under the limiting effect of the adjusting clamping shaft 515 on the inner wall of the inclined groove of the downward pressing push rod 512, the downward pressing push rod 512 rotates clockwise around one end of the power slider 513 while sliding downward. When the adjusting clamping shaft 515 is located at the junction of the inclined groove and the vertical groove of the downward pressing push rod 512, the side of the bent part of the downward pressing push rod 512 away from the power slider 513 is in a vertical state, and the downward pressing push rod 512 stops rotating. The horizontal part of the downward pressing push rod 512 is located directly above the fixed frame 3. And as the downward pressing push rod 512 continues to slide downward, the adjusting clamping shaft 515 slides in the vertical groove of the downward pressing push rod 512, and the downward pressing push rod 512 slides vertically downward. The rubber pad on the lower surface of the horizontal part of the downward pressing push rod 512 contacts the upper surface of the fixed frame 3 and gives the fixed frame 3 a downward thrust from top to bottom. At this time, the downward pressing push rod 512 stops sliding under the block of the fixed frame 3. The fitting slider 511 slides downward along the inner wall of the power slider 513 under the push of the fixed frame 3. The third spring 516 is compressed under the push of the fitting slider 511. By giving the fixed frame 3 a downward thrust through the downward pressing push rod 512, the stability and uniformity of the clamping force during the clamping process of the fixed frame 3 are increased, the occurrence of vibration and deformation of the fixed frame 3 during the clamping process is reduced, and the processing accuracy is improved.

[0025] As Figure 9 and Figure 10 shown, as Figure 9 in, the limiting mechanism 6 includes a stop surface slider 611. The stop surface slider 611 is slidably connected to the surface of the moving frame 411. As Figure 10Inside, a power slide bar 613 is slidably connected inside the moving frame 411, and a transmission slide bar 614 is slidably connected inside the moving frame 411. Restoration blocks are fixedly connected to both sides of the transmission slide bar 614. A fourth spring 615 is fixedly connected inside the moving frame 411, and is fixedly connected between the fourth spring 615 and the restoration blocks on the surface of the transmission slide bar 614. Both ends of the power slide bar 613 and the transmission slide bar 614 are provided with inclined surfaces, and the inclined surfaces of the power slide bar 613 and the transmission slide bar 614 are in contact. The inclined surface of the power slide bar 613 extends into the sliding path inside the moving frame 411. By pushing the adjusting shaft 412, the connection relationship between the moving frame 411 and the placement platform 2 is released, and the moving frame 411 is pushed to slide to the right. The moving frame 411 contacts the inclined surface of the power slide bar 613 and pushes the power slide bar 613 to contract into the placement platform 2, and by pushing the section surface of the transmission slide bar 614, the transmission slide bar 614 is pushed to slide to the right. At this time, the fourth spring 615 is compressed under the push of the restoration blocks on both sides of the transmission slide bar 614, as Figure 10 Inside, a switching slider 612 is slidably connected inside the moving frame 411. A fifth spring 617 is fixedly connected inside the moving frame 411, and is fixedly connected between the fifth spring 617 and the switching slider 612. An extension slide bar 618 is fixedly connected to the surface of the stop surface slider 611. A clamping groove is formed on the surface of the switching slider 612. The extension slide bar 618 is slidably connected inside the clamping groove inside the switching slider 612. A limiting clamping block 616 is fixedly connected to the lower surface of one end of the extension slide bar 618. Both the switching slider 612 and one end of the limiting clamping block 616 are provided with inclined surfaces. The inclined surface of the switching slider 612 is located inside the sliding path of the transmission slide bar 614. When the transmission slide bar 614 slides to the right and contacts the inclined surface of the switching slider 612, a push is given to the inclined surface of the switching slider 612, thereby pushing the switching slider 612 to slide downward. At this time, the switching slider 612 disengages from the sliding path inside the limiting clamping block 616 on the surface of the extension slide bar 618, and the limiting clamping block 616 is aligned with the clamping groove on the surface of the switching slider 612. At this time, the clamping connection relationship between the extension slide bar 618 and the switching slider 612 through the limiting clamping block 616 is released. By manually pushing the stop surface slider 611 to slide away from the switching slider 612, the extension slide bar 618 is driven to disengage from the clamping groove inside the switching slider 612, and an opening is provided for the moving frame 411, so as to take out the moving frame 411 from the sliding groove of the placement platform 2, and then perform maintenance and replacement.

[0026] The effects achieved by this embodiment are as follows: The following is the entire working process and working principle of the above embodiment: Initially: The extending abutting block 4110 is located in the gap between adjacent limiting tooth blocks 417. The switching shaft 419 is located at the end of the adjusting groove of the extending abutting block 4110 away from the placing platform 2. The fixed frame 3 is located between the movable clamping block 413 and the fixed clamping block 4111. The adjusting clamping shaft 515 is located at the bottom end of the V-shaped groove of the pressing push rod 512. The pressing push rod 512 is in a state of spreading outwards. The power sliding rod 613 is located inside the sliding groove on the surface of the placing platform 2. The fifth spring 617 and the fourth spring 615 are in an uncompressed state. The extending sliding rod 618 is located inside the clamping groove of the switching slider 612, and the limiting clamping block 616 is located on the left side of the switching slider 612. The switching slider 612 is located inside the sliding path of the limiting clamping block 616.

[0027] During operation: When due to machining errors, the dimensions of the overall components of the vehicle body change slightly and the position of the moving mechanism 4 on the surface of the placing platform 2 needs to be adjusted. As Figure 5 shown in Figure 6 , manually push the adjusting shaft 412 to slide to the left. The first spring 416 is compressed under the push of the blocking blocks on both sides of the connecting push rod 415. Then, the top surface dialing block 418 is driven to slide to the left through the connecting push rod 415. Since the switching shaft 419 on the lower surface of the top surface dialing block 418 is slidably connected inside the adjusting groove on the surface of the extending abutting block 4110, during the process of the switching shaft 419 sliding to the left driven by the top surface dialing block 418, a thrust towards the connecting push rod 415 direction is given to the adjusting groove on the surface of the extending abutting block 4110. Then, the extending abutting block 4110 is pushed to slide towards the connecting push rod 415 direction, and then the extending abutting block 4110 is driven to disengage from inside the adjacent limiting tooth blocks 417, thus releasing the connection and fixation between the moving frame 411 and the placing platform 2. Then, the moving frame 411 is pushed to drive the left surface of the extending abutting block 4110 to fit with the right surface of the fixed frame 3. At this time, the manual thrust on the adjusting shaft 412 is released. The connecting push rod 415 slides to the right under the thrust provided by the restoration of the first spring 416. Then, the extending abutting block 4110 is pushed to re-enter the gap between the adjacent limiting tooth blocks 417 through the switching shaft 419 on the surface of the top surface dialing block 418, and then the moving frame 411 is fixed on the surface of the placing platform 2. At this time, the power gear 414 is driven to rotate by the output shaft of the motor, and the movable clamping block 413 is pushed to slide to the left through the tooth blocks on the upper surface of the moving frame 411, and then the fixed frame 3 between the movable clamping block 413 and the fixed clamping block 4111 is clamped, solving the problem that the position of the clamping mechanism cannot be adjusted, resulting in uneven distribution of the clamping force, achieving that the moving mechanism 4 can be adjusted to the optimal position according to the shape and size of the component to ensure uniform distribution of the clamping force, improve the clamping effect, reduce the deformation and displacement of the component during the machining process, and can quickly adjust the position of the moving mechanism 4 to adapt to different machining tasks, reducing the time and workload of replacing the fixture and improving the production efficiency.

[0028] Further, when the left side wall of the fixed frame 3 is in contact with the right side wall of the fixed clamping block 4111, the fixed frame 3 is disengaged from the inclined surface of the fitting slider 511, and the fitting slider 511 slides downward under the drive of the downward force on the inclined surface of the fitting slider 511 given by the fixed frame 3. At this time, the fitting slider 511 pushes the power slider 513 to slide downward on the inner wall of the moving frame 411 by giving a downward force to the third spring 516. The second spring 514 is compressed under the push of the power slider 513. The downward sliding of the power slider 513 gives a downward force to one end of the downward pressure push rod 512. Since the adjustment clamping shaft 515 is slidably connected inside the V-shaped groove on the surface of the downward pressure push rod 512, and the V-shaped groove is composed of a vertical groove and an inclined surface groove, the downward pressure push rod 512 slides downward under the drive of the power slider 513. And under the restriction of the inclined surface groove of the downward pressure push rod 512 given by the adjustment clamping shaft 515, the downward pressure push rod 512 rotates clockwise around the adjustment clamping shaft 515 until the downward pressure push rod 512 becomes vertical. At this time, the horizontal part of the downward pressure push rod 512 is located directly above the fixed frame 3 and is parallel to the fixed frame 3. At this time, the adjustment clamping shaft 515 is located inside the vertical part of the V-shaped groove of the downward pressure push rod 512, and the downward pressure push rod 512 stops rotating. As the downward pressure push rod 512 continues to slide downward under the drive of the power slider 513, the rubber pad at one end of the downward pressure push rod 512 contacts the upper surface of the fixed frame 3 and gives a downward thrust to the fixed frame 3. At the same time, the downward pressure push rod 512 stops sliding under the restriction of the fixed frame 3, and the fitting slider 511 slides inside the power slider 513 under the pressure of the fixed frame 3. The third spring 516 is compressed between the power slider 513 and the fitting slider 511. By giving a downward thrust to the fixed frame 3 through the downward pressure push rod 512, the vibration and displacement of the vehicle body frame 1 during the clamping process are reduced, thereby improving the processing accuracy. By giving a downward thrust to the clamping part, the stability and uniformity of the clamping force can be increased, the occurrence of vibration and deformation can be reduced, the processing accuracy and surface quality can be improved, and the stability and uniformity of the clamping force can ensure that the overall components of the EMU vehicle body will not loosen or fall off during the processing process, avoiding the occurrence of safety accidents.

[0029] Furthermore, when the fixture is in long-term use, when the fixed clamping block 4111 and the movable clamping block 413 are worn and damaged and the moving mechanism 4 needs to be repaired and adjusted, the connection state between the moving frame 411 and the placement platform 2 is released by pushing the adjustment shaft 412, so as to push the moving frame 411 to slide away from the vehicle body frame 1, as Figure 9As shown, the moving frame 411 slides to the right. The moving frame 411 comes into inclined contact with the power sliding rod 613. The power sliding rod 613 slides towards both sides of the placement platform 2 under the push of the moving frame 411. The power sliding rod 613 comes into inclined contact with the transmission sliding rod 614 and pushes the transmission sliding rod 614 to slide to the right. At this time, the fourth spring 615 is compressed under the push of the restoring blocks on both sides of the transmission sliding rod 614. The transmission sliding rod 614 comes into inclined contact with the switching slider 612. The switching slider 612 slides downward under the push of the transmission sliding rod 614. At this time, the fifth spring 617 slides downward under the push of the switching slider 612, thereby causing the transmission sliding rod 614 to disengage from the surface of the switching slider 612 and being completely aligned with the positioning groove on the surface of the switching slider 612. Thereby, the clamping relationship between the extension sliding rod 618 and the switching slider 612 is released. By pushing the stop surface slider 611 to slide away from the switching slider 612, an opening is provided for the moving frame 411, so that the moving frame 411 can be taken out from the inside of the placement platform 2 for maintenance and replacement, solving the problem that the moving mechanism 4 is not easily disassembled from the inside of the placement platform 2, which affects the production efficiency. The moving mechanism 4 is easy to disassemble, can be maintained and repaired more conveniently, reduces the downtime, and improves the production efficiency. Moreover, the clamping mechanism is easy to disassemble, can be cleaned and maintained more conveniently, and prolongs the service life of the clamping mechanism.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automated fixture for processing integral components of a CRH2 motor vehicle body, comprising a placement platform (2), a body frame (1) being placed on the top of the placement platform (2), a fixing frame (3) being fixedly connected to the lower surface of the body frame (1), characterized in that: The placement platform (2) is provided with a moving mechanism (4) capable of providing a clamping function at various positions on the surface of the placement platform (2), the placement platform (2) is provided with a pressure mechanism (5) for reducing vibration and deformation of the fixed frame (3) during processing, and the placement platform (2) is provided with a limiting mechanism (6) for facilitating the disassembly of the moving mechanism (4).

2. The automated fixture for processing the integral components of a CRH2 motor vehicle body according to claim 1 is characterized by: The moving mechanism (4) comprises two moving frames (411), the upper surface of the placement platform (2) is provided with two sliding grooves, the two moving frames (411) are both slidably connected to the inside of the sliding grooves on the surface of the placement platform (2), a plurality of limiting tooth blocks (417) are fixedly connected to the inside of the sliding grooves on the surface of the placement platform (2), the upper surface of the moving frame (411) is slidably connected to a movable clamping block (413), the upper surface of the moving frame (411) is rotatably connected to a power gear (414), the inner wall of the movable clamping block (413) is fixedly connected to a tooth block, the power gear (414) and the tooth block on the inner wall of the movable clamping block (413) are meshed, the interior of the moving frame (411) is slidably connected to a connecting push rod (415), one end of the connecting push rod (415) is fixedly connected to a top surface shifting block (418), the interior of the moving frame (411) is slidably connected to an extension block (4110), the extension block ( The extending block (4110) is slidably connected between adjacent limiting tooth blocks (417), an adjustment groove is provided on the surface of the extending block (4110), and both end surfaces of the top shift block (418) are fixedly connected with a switching shaft (419), and the switching shaft (419) is slidably connected to the inside of the adjustment groove on the surface of the extending block (4110), and the surface of the moving frame (411) is slidably connected with an adjustment shaft (412), and the adjustment shaft (412) is fixedly connected to the connecting push rod (411). 5), a spring (416) is fixedly connected inside the movable frame (411), stop blocks are fixedly connected on both sides of the connecting push rod (415), the stop blocks on both sides of the connecting push rod (415) are fixedly connected to the spring (416), a fixed clamping block (4111) is fixedly connected to the upper surface of the movable frame (411), and the fixed frame (3) is located between the fixed clamping block (4111) and the movable clamping block (413).

3. The automated fixture for processing the integral components of a CRH2 motor vehicle body according to claim 2 is characterized by: The power gear (414) and the fixed clamping block (4111) are both fixedly connected to a rubber pad with a rough surface on one side close to the fixed frame (3).

4. The automated fixture for processing the integral components of a CRH2 motor vehicle body according to claim 2 is characterized by: The sliding distance of the extended stop block (4110) is greater than the length between the extended stop block (4110) and the adjacent limiting tooth blocks (417).

5. The automated fixture for processing the integral components of a CRH2 motor vehicle body according to claim 2 is characterized by: The pressure mechanism (5) comprises a fitting slider (511), the fitting slider (511) is slidably connected to the inside of the moving frame (411), the inner wall of the adjustment shaft (412) is slidably connected to a power slider (513), the bottom of the inner wall of the moving frame (411) is fixedly connected to a No. 2 spring (514), the No. 2 spring (514) and the power slider (513) are fixedly connected, the fitting slider (511) is slidably connected to the inside of the power slider (513), and the The inner wall of the power slider (513) is fixedly connected to a No. 3 spring (516), and the No. 3 spring (516) is fixedly connected to the fitting slider (511). The inner wall surface of the movable frame (411) is fixedly connected to an adjustment clamping shaft (515). The surface of the power slider (513) is rotatably connected to a downward push rod (512), and a V-shaped groove is formed on the surface of the downward push rod (512). The adjustment clamping shaft (515) is located inside the V-shaped groove on the surface of the downward push rod (512).

6. The automated fixture for processing the integral components of a CRH2 motor vehicle body according to claim 5 is characterized by: A rubber pad is fixedly connected to the lower surface of one end of the power slider (513), and the sliding distance of the adjustment clamping shaft (515) inside the V-shaped groove of the push rod (512) is greater than the sliding distance of the fitting slider (511) inside the power slider (513).

7. The automated fixture for processing the integral components of a CRH2 motor vehicle body according to claim 5 is characterized by: The spring coefficient of the No. 3 spring (516) is greater than the spring coefficient of the No. 2 spring (514).

8. The automated fixture for processing the integral components of a CRH2 motor vehicle body according to claim 5 is characterized by: The limiting mechanism (6) comprises a blocking surface slider (611), the blocking surface slider (611) is slidably connected to the surface of the moving frame (411), the interior of the moving frame (411) is slidably connected to a switching slider (612), the interior of the moving frame (411) is fixedly connected to a No. 5 spring (617), the No. 5 spring (617) and the switching slider (612) are fixedly connected, the surface of the blocking surface slider (611) is fixedly connected to an extension slide bar (618), the surface of the switching slider (612) is provided with a locking groove, and the extension slide bar (618) ) is slidably connected to the interior of the internal locking groove of the switching slider (612); the lower surface of one end of the extension slide bar (618) is fixedly connected to the limiting block (616); the interior of the moving frame (411) is slidably connected to the power slide bar (613); the interior of the moving frame (411) is slidably connected to the transmission slide bar (614); the two sides of the transmission slide bar (614) are fixedly connected to the restoration blocks; the interior of the moving frame (411) is fixedly connected to the fourth spring (615); the fourth spring (615) is fixedly connected to the restoration block on the surface of the transmission slide bar (614).

9. The automated fixture for processing the integral components of a CRH2 motor vehicle body according to claim 8, characterized in that: The power slide bar (613) and the transmission slide bar (614) are both provided with inclined surfaces at one end, the power slide bar (613) and the transmission slide bar (614) inclined surfaces are in contact with each other, the inclined surface of the power slide bar (613) extends into the inside of the sliding path of the moving frame (411), the switching slide bar (612) and the limit block (616) are both provided with inclined surfaces at one end, and the inclined surface of the switching slide bar (612) is located inside the sliding path of the transmission slide bar (614).

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