A throttle valve body welding clamp and positioning clamping method

Abstract

This invention relates to a welding fixture and positioning clamping method for a throttle valve body. The fixture includes: a positioning clamping mechanism comprising a first positioning clamping assembly and a second positioning clamping assembly that are relatively far apart or close together by axial tension, used to clamp the valve body; a valve plate adjustment mechanism that can pull a first valve plate limiting rod and a second valve plate limiting rod via a second tension spring to adjust the valve plate angle; a gear limiting mechanism that applies force to a second acting end, and can pull a slide block via a third tension spring to move a second rolling element along the trajectory surface of a second guide plate, so that the limiting rod abuts against the side wall of the drive gear; and a gear pressing mechanism that applies force to a third acting end, and pulls a support via a fourth tension spring, and / or applies force to the fourth acting end, and pulls a gear pressing plate via a fifth tension spring, so that the gear pressing plate presses against the drive gear. This invention satisfies the angular relationship between the throttle valve body housing, shaft, valve plate, and drive gear, ensuring welding quality.

Description

Technical Field

[0001] This invention relates to the field of tools for clamping, and in particular to a throttle valve body welding fixture and positioning clamping method. Background Technology

[0002] The ETC system (Electronic Throttle Control) consists of an electronic throttle body (ETB) located in the engine intake manifold and a dedicated control system.

[0003] It works in conjunction with the Engine Management System (EMS) through sensors, controllers, and throttle actuators to quickly and accurately control the throttle opening based on driver and engine torque requirements, vehicle driving status, and other relevant information. This precisely adjusts the intake air volume, allowing the engine to operate in the most suitable condition, giving the vehicle excellent transition performance during rapid acceleration and deceleration. As a result, emissions and fuel consumption are effectively reduced, and the vehicle's power, stability, safety, and comfort are improved. At the same time, the ETC system can also change the throttle opening and engine torque output according to the requirements of other vehicle systems, such as the Anti-Slip Regulation (ASR) system, Cruise Control System (CCS) system, and Vehicle Stability Control (VSC) system.

[0004] As an electromechanical integrated product, the electronic throttle valve mainly consists of a position sensor, a control system, and an actuator. The actuator consists of an ETB, a drive motor, a reduction gear set, and a return spring.

[0005] like Figure 1 As shown, the throttle valve body 700 consists of a housing 704, a throttle valve plate 702, and a rotating shaft 703. The throttle valve plate 702 has a certain thickness. When the valve is fully closed, the valve plate 702 will get stuck in the intake pipe. Therefore, the full closing angle (the angle between the throttle valve plate 702 and the vertical direction of the air flowing into the valve body) is not 0°, but 2°-5°.

[0006] The valve plate 702 is designed in an elliptical shape, and its opening range is 0°-88°. In a static state, the valve is not completely closed; instead, a return spring maintains the throttle opening at approximately 9°. When the throttle is open by θ, the effective area is the projected area of ​​the throttle valve perpendicular to the airflow direction.

[0007] drive motor ( Figure 1(Not shown in the image) A 12V DC servo motor with high response speed, accuracy, and frequency is used to provide appropriate torque to the throttle valve plate. To reduce power consumption and smooth current peaks, the engine control unit (ECU) outputs signals on two pulse width modulation (PWM) channels to control the simultaneous conduction of two sets of power transistors on the diagonal of the bidirectional H-bridge circuit. Specifically, the direction of the drive motor is controlled by changing the current direction, the magnitude of the drive current is adjusted by changing the duty cycle of the PWM signal to control the motor torque, and the corresponding torque is transmitted to the throttle valve through a reduction gear set.

[0008] Depend on Figure 1 It can be seen that the reduction gear set on the throttle valve body 700 is connected to the drive motor and the throttle valve. The reduction gear set consists of the driving gear 701 and the driven gear.

[0009] On the assembly line, the connection between the drive gear 701 and the shaft 703 is basically achieved by laser welding. During the laser welding process, due to the presence of a complete closing angle, there is a preset angle between the throttle valve plate 702 and the drive gear 701. Therefore, whether the assembly positioning of the housing 704, the shaft 703 and the drive gear 701 is correct will directly affect the welding quality.

[0010] In previous designs, the existing positioning fixtures for housing 704, shaft 703 and drive gear 701 had the following shortcomings: low assembly positioning accuracy between shaft 703 and drive gear 701; poor positioning repeatability and low reliability for different models of throttle valve body 700, resulting in poor consistency of laser welding, and a high rate of defective products or scrapped products. Summary of the Invention

[0011] To address the shortcomings of existing technologies, this invention discloses a throttle valve body welding fixture and a positioning and clamping method.

[0012] The technical solution adopted in this invention is as follows:

[0013] A clamp, comprising:

[0014] The positioning and clamping mechanism includes a first positioning and clamping assembly and a second positioning and clamping assembly that are relatively far apart or close together by axial tensile force, the first positioning and clamping assembly and the second positioning and clamping assembly being used to clamp the housing of the throttle valve body;

[0015] A valve plate adjustment mechanism includes a mounting base, a first valve plate limiting rod and a second valve plate limiting rod passing through the mounting base, and a limiting plate, wherein the limiting plate and the mounting base are disposed opposite to each other; at least one end of a second tension spring is fixedly connected to the mounting base, and the other end of the second tension spring is fixedly connected to the limiting plate; a first actuating end is provided on one side of the limiting plate; when a force is applied to the first actuating end, the first valve plate limiting rod and the second valve plate limiting rod can be pulled through the second tension spring to adjust the throttle valve plate angle of the throttle valve body;

[0016] A gear limiting mechanism includes a limiting rod, a slide, a second guide plate, and a third tension spring. The limiting rod is mounted on the slide. A second actuating end is provided on one side of the slide. The bottom of the slide is connected to one end of the third tension spring, and the other end of the third tension spring is fixedly connected to a first fixing member. The second guide plate has a track surface, and the slide is provided with a second rolling element that contacts the track surface. When a force is applied to the second actuating end, the slide can be pulled by the third tension spring, so that the second rolling element moves along the track surface of the second guide plate, thereby causing the limiting rod to press against the side wall of the drive gear of the throttle body.

[0017] A gear clamping mechanism includes a support, a gear clamping plate slidably connected to the support, at least one fourth tension spring, and at least one fifth tension spring. The gear clamping plate is mounted on the top of the support. One end of the fourth tension spring is connected to the support, and the other end of the fourth tension spring is connected to a second fixing member. One end of the fifth tension spring is connected to the gear clamping plate, and the other end of the fifth tension spring is connected to the support. A third actuating end is provided on one side of the support, and a fourth actuating end is provided at the bottom of the support. A force is applied to the third actuating end to pull the support through the fourth tension spring, and / or a force is applied to the fourth actuating end to pull the gear clamping plate through the fifth tension spring, so that the gear clamping plate clamps the driving gear of the throttle valve body.

[0018] In one embodiment of the present invention, the first positioning clamping assembly and the second positioning clamping assembly include a first clamping plate and a first rolling element disposed on one side of the first clamping plate, and the first clamping plate is connected to the clamping seat;

[0019] The positioning and clamping mechanism further includes a first guide plate, which has a symmetrical rolling surface opposite to the first rolling element.

[0020] In one embodiment of the present invention, the positioning and clamping mechanism further includes a first guide component to guide the first positioning and clamping component and the second positioning and clamping component to move closer or further apart; the first guide component includes a first guide rail and a first slider that slides along the first guide rail, and the first slider is connected to the first clamping plate.

[0021] In one embodiment of the present invention, the first valve plate limiting rod and the second valve plate limiting rod are arranged in parallel, and the ends of the first valve plate limiting rod and the ends of the second valve plate limiting rod act on two points of action of the throttle valve plate, respectively.

[0022] In one embodiment of the present invention, the trajectory surface of the second guide plate has a height difference in the vertical direction of the second guide plate.

[0023] In one embodiment of the present invention, the first functional terminal, the second functional terminal, the third functional terminal and the fourth functional terminal are respectively connected to a driving source.

[0024] In one embodiment of the present invention, the positioning and clamping mechanism further includes a positioning member, which is disposed on one side of the positioning and clamping assembly and extends in the length direction of the positioning and clamping assembly;

[0025] The clamp also includes a locking mechanism, which is configured to lock or unlock the positioning element by lifting or lowering.

[0026] In one embodiment of the present invention, the locking mechanism includes a lifting rod and at least one locking block. The lifting rod is connected to the locking block and is also connected to a lifting drive source. The lifting drive source drives the lifting rod to move up and down, thereby causing the locking block to move up and down. The locking block has a locking channel, and the positioning member can extend into the locking channel.

[0027] In one embodiment of the invention, a central positioning mechanism is further included, which is configured to position the housing of the throttle valve body by lifting and lowering.

[0028] In one embodiment of the present invention, a clamping positioning plate is further included, which is used to mount the positioning clamping mechanism, the valve plate adjusting mechanism, the gear limiting mechanism and the gear pressing mechanism.

[0029] The present invention also provides a positioning and clamping method for positioning and clamping a throttle valve using the clamp described above, comprising the following steps:

[0030] When the positioning and clamping mechanism is activated, the first positioning and clamping assembly and the second positioning and clamping assembly are relatively far apart and are placed into the housing of the throttle valve body. Then, the first positioning and clamping assembly and the second positioning and clamping assembly are relatively close to each other and clamp the housing of the throttle valve body.

[0031] The valve plate adjustment mechanism is activated, and a force is applied to the first working end. The first valve plate limiting rod and the second valve plate limiting rod can be pulled by the second tension spring to adjust the angle of the throttle valve plate in the housing to the preset angle.

[0032] The gear limiting mechanism is activated, and a force is applied to the second working end. The slide can be pulled by the third tension spring, so that the second rolling element moves along the trajectory surface of the second guide plate, so that the limiting rod abuts against the side wall of the driving gear of the throttle valve body.

[0033] The gear clamping mechanism is activated, and a force is applied to the third working end to pull the support through the fourth tension spring, and / or a force is applied to the fourth working end to pull the gear clamping plate through the fifth tension spring, so that the gear clamping plate clamps the driving gear of the throttle valve body.

[0034] The technical solution of the present invention has the following advantages compared with the prior art:

[0035] The throttle valve body welding fixture of the present invention consists of a positioning and clamping mechanism, a valve plate adjustment mechanism, a gear limiting mechanism, a gear pressing mechanism, and a center positioning mechanism. It meets the process requirements of laser welding of the throttle valve body, satisfies the positioning accuracy of the throttle valve body, and finally completes the laser welding and ensures the quality.

[0036] The throttle valve body welding fixture of the present invention clamps the housing to prevent it from shaking by setting a positioning and clamping mechanism, and meets the positioning position size requirements, and meets the angular relationship between the housing, rotating shaft, throttle valve plate and drive gear, thereby ensuring the quality of laser welding.

[0037] The throttle valve body welding fixture of the present invention adjusts and limits the angle of the throttle valve plate by setting a valve plate adjustment mechanism.

[0038] The throttle valve body welding fixture of the present invention ensures the correct phase angle between the drive gear and the throttle valve plate by setting a gear limiting mechanism.

[0039] The throttle valve body welding fixture of the present invention ensures that the drive gear is fixed and does not vibrate during laser welding of the throttle valve body through a gear clamping mechanism, thereby improving the welding quality. Attached Figure Description

[0040] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0041] Figure 1 This is a schematic diagram of the existing throttle valve body.

[0042] Figure 2 This is a schematic diagram of the throttle valve body welding fixture in this invention.

[0043] Figure 3 This is a schematic diagram of the positioning and clamping mechanism in this invention.

[0044] Figure 4 This is a schematic diagram of the valve plate adjustment mechanism in this invention.

[0045] Figure 5 This is a schematic diagram of the gear limiting mechanism in this invention.

[0046] Figure 6 This is a first-view structural schematic diagram of the gear clamping mechanism in this invention.

[0047] Figure 7 This is a schematic diagram of the gear clamping mechanism in this invention from a second perspective.

[0048] Figure 8 This is a schematic diagram of the locking mechanism in this invention.

[0049] Figure 9 This is a structural schematic diagram of the throttle valve body welding fixture in use according to the present invention.

[0050] Explanation of reference numerals in the accompanying drawings: 100, Positioning and clamping mechanism; 101, First tension spring; 102, First clamping plate; 103, First rolling element; 104, First guide plate; 105, Clamping block; 106, Clamping seat; 107, Positioning element; 108, First guide assembly; 200, Valve plate adjusting mechanism; 201, First actuating end; 202, Limiting plate; 203, Second tension spring; 204, Mounting base; 205, First valve plate limiting rod; 206, Second valve plate limiting rod; 207, Locking element; 300, Gear limiting mechanism; 301, Second actuating end; 302, Third tension spring; 303, First sliding plate; 304, Second rolling element; 305, Second guide plate; 306. Limiting rod; 307, second sliding plate; 308, second guide assembly; 400, gear clamping mechanism; 401, third actuating end; 402, gear clamping plate; 403, third guide assembly; 404, mounting plate; 405, first fixing pin; 406, fourth tension spring; 407, fourth guide assembly; 408, second fixing pin; 409, fifth tension spring; 410, third fixing pin; 411, support; 500, locking mechanism; 501, first locking block; 502, second locking block; 503, actuating rod; 504, lifting rod; 600, center positioning mechanism; 700, throttle valve body; 701, drive gear; 702, throttle valve plate; 703, rotating shaft; 704, housing. Detailed Implementation

[0051] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0052] The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, or back, are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present invention. Furthermore, in all embodiments, the same reference numerals denote the same elements.

[0053] Example 1

[0054] like Figure 2 As shown, a throttle valve body welding fixture includes:

[0055] The positioning and clamping mechanism 100 includes a first positioning and clamping assembly and a second positioning and clamping assembly that are relatively far apart or close together by axial tension. The first positioning and clamping assembly and the second positioning and clamping assembly are used to clamp the housing 704 of the throttle valve body 700.

[0056] The valve plate adjustment mechanism 200 includes a mounting base 204, a first valve plate limiting rod 205 and a second valve plate limiting rod 206 passing through the mounting base 204, and a limiting plate 202. The limiting plate 202 and the mounting base 204 are arranged opposite to each other. At least one end of a second tension spring 203 is fixedly connected to the mounting base 204, and the other end of the second tension spring 203 is fixedly connected to the limiting plate 202. A first action end 201 is provided on one side of the limiting plate 202. When a force is applied to the first action end 201, the first valve plate limiting rod 205 and the second valve plate limiting rod 206 can be pulled by the second tension spring 203 to adjust the angle of the throttle valve plate 702 of the throttle valve body 700.

[0057] The gear limiting mechanism 300 includes a limiting rod 306, a slide block, a second guide plate 305, and a third tension spring 302. The limiting rod 306 is mounted on the slide block. A second action end 301 is provided on one side of the slide block. The bottom of the slide block is connected to one end of the third tension spring 302, and the other end of the third tension spring 302 is fixedly connected to a first fixing member. The second guide plate 305 has a track surface, and the slide block is provided with a second rolling element 304 that contacts the track surface. When a force is applied to the second action end 301, the slide block can be pulled by the third tension spring 302, so that the second rolling element 304 moves along the track surface of the second guide plate 305, so that the limiting rod 306 abuts against the side wall of the drive gear 701 of the throttle valve body 700.

[0058] The gear clamping mechanism 400 includes a support 411, a gear clamping plate 402 slidably connected to the support 411, at least one fourth tension spring 406, and at least one fifth tension spring 409. The gear clamping plate 402 is mounted on the top of the support 411. One end of the fourth tension spring 406 is connected to the support 411, and the other end of the fourth tension spring 406 is connected to a second fixing member. One end of the fifth tension spring 409 is connected to the gear clamping plate 402, and the other end of the fifth tension spring 409 is connected to the support 411. A third action end 401 is provided on one side of the support 411, and a fourth action end is provided at the bottom of the support 411. A force is applied to the third action end 401 to pull the support 411 through the fourth tension spring 406, and / or a force is applied to the fourth action end to pull the gear clamping plate 402 through the fifth tension spring 409, so that the gear clamping plate 402 clamps the drive gear 701 of the throttle valve body 700.

[0059] This embodiment provides a fixture that satisfies the angular phase relationship between the housing 704, rotating shaft 703, throttle valve plate 702 and drive gear 701 of the throttle valve body 700, and ensures the laser welding quality of the rotating shaft 703 and drive gear 701.

[0060] In this embodiment, as Figure 3As shown, the first positioning clamping assembly and the second positioning clamping assembly include a first clamping plate 102 and a first rolling element 103 disposed on one side of the first clamping plate 102. The first clamping plate 102 and the clamping seat 106 are connected. Specifically, one end of the first tension spring 101 is connected to the first clamping plate 102 of the first positioning clamping assembly, and the other end of the first tension spring 101 is connected to the first clamping plate 102 of the second positioning clamping assembly. Since the first clamping plate 102 and the clamping seat 106 are not on the same plane, the first clamping plate 102 and the clamping seat 106 are connected by a clamping block 105. One side of the clamping block 105 is connected to the first clamping plate 102, and the other side of the clamping block 105 is connected to the clamping seat 106.

[0061] The positioning and clamping mechanism 100 also includes a first guide plate 104, which has a symmetrical rolling surface opposite to the first rolling element 103. The first rolling element 103 can be a roller. One side of the first guide plate 104 can be connected to a lifting drive source. When the lifting drive source is activated, the first guide plate 104 is driven to move up and down in its height direction. When the first positioning and clamping assembly and the second positioning and clamping assembly approach each other relative to each other by axial force, the first rolling element 103 can roll on the rolling surface of the first guide plate 104, thereby clamping the housing 704 of the throttle valve body 700.

[0062] Preferably, the rolling surface of the first guide plate 104 is as follows: Figure 3 As shown, there is an inclined plane, which allows the first rolling element 103 to rise to a certain height when it rolls on the rolling surface of the first guide plate 104, so that it can fit more closely to the housing 704 of the throttle valve body 700.

[0063] Furthermore, the positioning clamping mechanism 100 also includes a first guide component 108, which guides the first positioning clamping component and the second positioning clamping component to be relatively close or relatively far apart; the first guide component 108 includes a first guide rail and a first slider that slides along the first guide rail, and the first slider is connected to the first clamping plate 102.

[0064] In this embodiment, as Figure 4 As shown, the first valve plate limiting rod 205 and the second valve plate limiting rod 206 are arranged in parallel. The ends of the first valve plate limiting rod 205 and the second valve plate limiting rod 206 act on two points of action of the throttle valve plate 702, respectively. It should be noted that the length of the first valve plate limiting rod 205 is greater than the length of the second valve plate limiting rod 206, that is, the lengths of the first valve plate limiting rod 205 and the second valve plate limiting rod 206 are different. The purpose of this is that the second valve plate limiting rod 206 contacts the throttle valve plate 702 first, and the first valve plate limiting rod 205 contacts the throttle valve plate 702 afterward, thereby adjusting the angle of the throttle valve plate 702 within the housing 704.

[0065] Preferably, the ends of the first valve plate limiting rod 205 and the second valve plate limiting rod 206 that contact the throttle valve plate 702 are respectively provided with nylon pins to prevent damage to the throttle valve plate 702. The nylon pins control and prevent the limiting rods from deforming when they hit the throttle valve plate 702.

[0066] Furthermore, the valve plate adjustment mechanism 200 also includes a locking member 207. Correspondingly, the second valve plate limiting rod 206 has a locking groove. The locking member 207 is driven to rise and fall by a lifting drive source and can fall into the locking groove to lock the second valve plate limiting rod 206.

[0067] In this embodiment, as Figure 5 As shown, the trajectory surface of the second guide plate 305 has a height difference in the vertical direction of the second guide plate 305. The second guide plate 305 allows the limiting rod 306 to move along a certain trajectory to avoid interference. Specifically, the trajectory surface of the second guide plate 305 includes a first trajectory segment and a second trajectory segment. The height between the first trajectory segment and the bottom of the second guide plate 305 is set as h1, and the height between the second trajectory segment and the bottom of the second guide plate 305 is set as h2, where h1 < h2. Furthermore, the first trajectory segment is close to the throttle valve body 700. Preferably, the first trajectory segment and the second trajectory segment are connected by an arc transition.

[0068] In this embodiment, one end of the limiting rod 306 is designed as a multi-step structure, such as... Figure 5 As shown, one end of the limiting rod 306 forms a three-step structure to prevent collision with the drive gear 701 before the limiting rod 306 reaches the designated position. It should be noted that the drive gear 701 shown in this embodiment is a sector gear. Therefore, during the movement of the second rolling element 304 along the trajectory surface of the second guide plate 305, the limiting rod 306 will push the drive gear 701 to rotate at a certain angle, so that one side of the sector gear contacts the housing 704, and the other side of the sector gear is pressed against the side wall of the drive gear 701 by the limiting rod 306, ensuring that the angle between the sector gear and the throttle valve plate 702 is correct.

[0069] Furthermore, the gear limiting mechanism 300 also includes a second guide assembly 308, which guides the slide block to move horizontally. Specifically, the second guide assembly 308 includes a second guide rail and a second slider that slides along the second guide rail, and the second slider is connected to the slide block. The slide block includes a first slide plate 303 and a second slide plate 307. The first slide plate 303 supports the second slide plate 307, and the second slider is connected to the first slide plate 303. The first slide plate 303 is provided with at least one fixing pin, one end of a third tension spring 302 is fixed to the fixing pin of the first slide plate 303, and the other end of the third tension spring 302 is fixed to a fixing member. The fixing member can be a vertical plate (not shown in the figure) with a fixing pin.

[0070] In this embodiment, combined with Figure 6 and Figure 7 The gear clamping mechanism 400 further includes a mounting plate 404, a third guide assembly 403, and a fourth guide assembly 407. The mounting plate 404 supports the third guide assembly 403, which is located between the gear clamping plate 402 and the support 411 to guide the gear clamping plate 402 to move vertically. The fourth guide assembly 407 is located between the mounting plate 404 and the clamp positioning plate to guide the mounting plate 404 to move horizontally. Specifically, the third guide assembly 403 includes a third guide rail and a third slider that slides along the third guide rail, and the third slider is connected to the support 411. The fourth guide assembly 407 includes a fourth guide rail and a fourth slider that slides along the fourth guide rail, and the fourth slider is connected to the mounting plate 404.

[0071] Mounting plate 404 is provided with a first fixing pin 405, which passes vertically through mounting plate 404. One end of fourth tension spring 406 is fixed to the first fixing pin 405, and the other end of fourth tension spring 406 is fixed to a fixing member. The fixing member can be a vertical plate (not shown in the figure) with a fixing pin.

[0072] The side wall of the support 411 is provided with a second fixing pin 408, and the mounting plate 404 is also provided with a third fixing pin 410. The second fixing pin 408 and the third fixing pin 410 are arranged in parallel. One end of the fifth tension spring 409 is fixed to the second fixing pin 408, and the other end of the fifth tension spring 409 is fixed to the third fixing pin 410.

[0073] In this embodiment, the first working end 201, the second working end 301, the third working end 401, and the fourth working end (not shown in the figure) are respectively connected to the driving source. That is, the first working end 201 is connected to the first driving source, the second working end 301 is connected to the second driving source, the third working end 401 is connected to the third driving source, and the fourth working end is connected to the fourth driving source. Specifically, the first driving source, the second driving source, the third driving source, and the fourth driving source can be commercially available single-acting cylinders, and the working ends of the cylinders are connected to the corresponding working ends.

[0074] As can be seen from the above, the drive source does not act directly on the corresponding part, but acts on the part through the tension of the spring. In the initial state of the fixture, the springs are all in a stretched state. The purpose of this is to avoid the drive source's force being too large, which would damage the throttle valve body 700 if it directly acts on the corresponding part.

[0075] like Figure 9 As shown, the working principle of this embodiment is as follows:

[0076] When the positioning clamping mechanism 100 is activated, the first positioning clamping component and the second positioning clamping component are relatively far apart and are placed into the housing 704 of the throttle valve body 700. Then, the first positioning clamping component and the second positioning clamping component are relatively close to each other and clamp the housing 704 of the throttle valve body 700.

[0077] The valve plate adjustment mechanism 200 is activated, and a force is applied to the first working end 201. The first valve plate limiting rod 205 and the second valve plate limiting rod 206 can be pulled by the second tension spring 203 to adjust the angle of the throttle valve plate 702 in the housing 704 of the throttle valve body 700 to a preset angle.

[0078] The gear limiting mechanism 300 is activated, and a force is applied to the second working end 301. The slide can be pulled by the third tension spring 302, so that the second rolling element 304 moves along the trajectory surface of the second guide plate 305, so that the limiting rod 306 abuts against the side wall of the driving gear 701 of the throttle valve body 700.

[0079] The gear clamping mechanism 400 is activated, applying a force to the third actuating end 401 to pull the support 411 via the fourth tension spring 406, and / or applying a force to the fourth actuating end to pull the gear clamping plate 402 via the fifth tension spring 409, so that the gear clamping plate 402 clamps the driving gear 701 of the throttle valve body 700. It should be noted that this process is adjusted according to the dimensions of the throttle valve body 700; either a force can be applied only to the third actuating end 401 to adjust the horizontal position of the gear clamping plate 402, or a force can be applied only to the fourth actuating end to adjust the vertical position of the gear clamping plate 402.

[0080] Example 2

[0081] Based on Embodiment 1, the positioning and clamping mechanism 100 further includes a positioning element 107, which is disposed on one side of the positioning and clamping assembly and extends in the length direction of the positioning and clamping assembly.

[0082] The fixture also includes a locking mechanism 500, which is configured to lock or unlock the positioning element 107 by lifting.

[0083] The locking mechanism 500 includes a lifting rod 504 and at least one locking block. The lifting rod 504 is connected to the locking block and is also connected to a lifting drive source. The lifting drive source drives the lifting rod 504 to rise and fall, thereby causing the locking block to rise and fall. The locking block has a locking channel, and the positioning member 107 can extend into the locking channel.

[0084] In this embodiment, as Figure 8As shown, there are two locking blocks, defined as a first locking block 501 and a second locking block 502. The first locking block 501 has a locking channel corresponding to the position of the positioning member 107. The second locking block 502 supports the first locking block 501 and can pass through the lifting rod 504. The lifting rod 504 can be directly connected to the lifting drive source or connected to the lifting drive source through a horizontally set action rod 503, depending on the installation space. The positioning member 107 can be a gasket or other sheet-like component.

[0085] The working principle of this embodiment is as follows:

[0086] In the initial state, the locking channel of the first locking block 501 corresponds to the positioning member 107. When the first tension spring 101 is in the stretched state, the positioning member 107 extends into the locking channel, and the lifting drive source drives the lifting rod 504 to rise. The lifting rod 504 passes through the second locking block 502 and the first locking block 501 in sequence and abuts against the positioning member 107.

[0087] Example 3

[0088] Based on Embodiment 1 or Embodiment 2, the throttle valve body welding fixture also includes a center positioning mechanism 600, which is configured to position the housing 704 of the throttle valve body 700 by lifting.

[0089] In this embodiment, the center positioning mechanism 600 includes a center lifting drive cylinder and a center positioning shaft connected to the working end of the center lifting drive cylinder. The center positioning shaft and the rotating shaft 703 of the throttle valve body 700 are coaxial, ensuring accurate laser welding position. When the center lifting drive cylinder is activated, it drives the ejector pin to rise and abut against the bottom of the housing 704.

[0090] Example 4

[0091] Based on any one of the embodiments from Embodiment 1 to Embodiment 3, the throttle valve body welding fixture further includes a fixture positioning plate, which is used to install the positioning clamping mechanism 100, the valve plate adjusting mechanism 200, the gear limiting mechanism 300, and the gear pressing mechanism 400.

[0092] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0093] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A throttle valve body welding fixture, characterized in that, include: The positioning and clamping mechanism (100) includes a first positioning and clamping assembly and a second positioning and clamping assembly that are relatively far apart or close together by axial tension. The first positioning and clamping assembly and the second positioning and clamping assembly are used to clamp the housing (704) of the throttle valve body (700). The first positioning and clamping assembly and the second positioning and clamping assembly include a first clamping plate (102) and a first rolling element (103) disposed on one side of the first clamping plate (102). The first clamping plate (102) and the clamping seat (106) are connected. The positioning and clamping mechanism (100) further includes a first guide plate (104), which has a symmetrical rolling surface opposite to the first rolling element (103); The valve plate adjustment mechanism (200) includes a mounting base (204), a first valve plate limiting rod (205) and a second valve plate limiting rod (206) passing through the mounting base (204), and a limiting plate (202). The limiting plate (202) and the mounting base (204) are arranged opposite to each other. At least one end of a second tension spring (203) is fixedly connected to the mounting base (204), and the other end of the second tension spring (203) is fixedly connected to the limiting plate (202). A first action end (201) is provided on one side of the limiting plate (202). When a force is applied to the first action end (201), the first valve plate limiting rod (205) and the second valve plate limiting rod (206) can be pulled by the second tension spring (203) to adjust the angle of the throttle valve plate (702) of the throttle valve body (700). The gear limiting mechanism (300) includes a limiting rod (306), a slide, a second guide plate (305), and a third tension spring (302). The limiting rod (306) is mounted on the slide. A second action end (301) is provided on one side of the slide. The bottom of the slide is connected to one end of the third tension spring (302), and the other end of the third tension spring (302) is fixedly connected to a first fixing member. The second guide plate (305) has a track surface, and the slide is provided with a second rolling element (304) that contacts the track surface. When a force is applied to the second action end (301), the slide can be pulled by the third tension spring (302) so that the second rolling element (304) moves along the track surface of the second guide plate (305) so that the limiting rod (306) abuts against the side wall of the drive gear (701) of the throttle body (700). A gear clamping mechanism (400) includes a support (411), a gear clamping plate (402) slidably connected to the support (411), at least one fourth tension spring (406), and at least one fifth tension spring (409). The gear clamping plate (402) is mounted on the top of the support (411). One end of the fourth tension spring (406) is connected to the support (411), and the other end of the fourth tension spring (406) is connected to a second fixing member. One end of the fifth tension spring (409) is connected to the gear clamping plate (402), and the fifth tension spring... The other end of (409) is connected to the support (411); a third working end (401) is provided on one side of the support (411), and a fourth working end is provided at the bottom of the support (411); a force is applied to the third working end (401) to pull the support (411) through the fourth tension spring (406), and / or a force is applied to the fourth working end to pull the gear pressing plate (402) through the fifth tension spring (409), so that the gear pressing plate (402) presses the drive gear (701) of the throttle valve body (700).

2. The throttle valve body welding fixture according to claim 1, characterized in that, The positioning clamping mechanism (100) further includes a first guide component (108) to guide the first positioning clamping component and the second positioning clamping component to be relatively close or relatively far apart; the first guide component (108) includes a first guide rail and a first slider that slides along the first guide rail, and the first slider is connected to the first clamping plate (102).

3. The throttle valve body welding fixture according to claim 1, characterized in that, The first valve plate limiting rod (205) and the second valve plate limiting rod (206) are arranged in parallel, and the ends of the first valve plate limiting rod (205) and the second valve plate limiting rod (206) act on two points of action of the throttle valve plate (702).

4. The throttle valve body welding fixture according to claim 1, characterized in that, The trajectory surface of the second guide plate (305) has a height difference in the vertical direction of the second guide plate (305).

5. The throttle valve body welding fixture according to claim 1, characterized in that, The first working end (201), the second working end (301), the third working end (401) and the fourth working end are respectively connected to the driving source.

6. The throttle valve body welding fixture according to any one of claims 1-5, characterized in that, The positioning and clamping mechanism (100) further includes a positioning element (107), which is disposed on one side of the positioning and clamping assembly and extends in the length direction of the positioning and clamping assembly; The clamp also includes a locking mechanism (500) configured to lock or unlock the positioning member (107) by lifting.

7. The throttle valve body welding fixture according to claim 6, characterized in that, The locking mechanism (500) includes a lifting rod (504) and at least one locking block. The lifting rod (504) is connected to the locking block and is also connected to a lifting drive source. The lifting drive source drives the lifting rod (504) to move up and down, thereby causing the locking block to move up and down. The locking block has a locking channel, and the positioning member (107) can extend into the locking channel.

8. The throttle valve body welding fixture according to any one of claims 1-5, characterized in that, It also includes a central positioning mechanism (600), which is configured to position the housing (704) of the throttle valve body (700) by lifting.

9. The throttle valve body welding fixture according to any one of claims 1-5, characterized in that, It also includes a clamping positioning plate for mounting the positioning clamping mechanism (100), the valve plate adjusting mechanism (200), the gear limiting mechanism (300), and the gear pressing mechanism (400).

10. A positioning and clamping method, characterized in that, The throttle valve body is positioned and clamped using the throttle valve body welding fixture as described in any one of claims 1-9, comprising the following steps: When the positioning clamping mechanism (100) is activated, the first positioning clamping component and the second positioning clamping component are relatively far apart and are placed into the housing (704) of the throttle valve body (700). Then, the first positioning clamping component and the second positioning clamping component are relatively close to each other and clamp the housing (704) of the throttle valve body (700). The valve plate adjustment mechanism (200) is activated, and a force is applied to the first working end (201). The first valve plate limiting rod (205) and the second valve plate limiting rod (206) can be pulled by the second tension spring (203) to adjust the angle of the throttle valve plate (702) of the throttle valve body (700) in the housing (704) to the preset angle. The gear limiting mechanism (300) is activated, and a force is applied to the second working end (301). The slide can be pulled by the third tension spring (302) so that the second rolling element (304) moves along the trajectory surface of the second guide plate (305) so that the limiting rod (306) abuts against the side wall of the driving gear (701) of the throttle valve body (700). The gear clamping mechanism (400) is activated, and a force is applied to the third working end (401) to pull the support (411) through the fourth tension spring (406), and / or a force is applied to the fourth working end to pull the gear clamping plate (402) through the fifth tension spring (409), so that the gear clamping plate (402) clamps the drive gear (701) of the throttle valve body (700).

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