Welding and positioning clamp for engine support

Abstract

The invention discloses an engine support welding positioning clamp, and belongs to the field of engine supports. An engine support welding positioning clamp comprises a supporting table and further comprises two supporting plates which are symmetrically arranged and fixedly installed on the left side and the right side of the top end of the supporting table respectively, clamping assemblies are arranged at the ends, close to the middle of the supporting table, of the tops of the two supporting plates, and cleaning assemblies are arranged at the tops of the clamping assemblies. A flow guide assembly is arranged at the bottom of the clamping assembly; the cleaning assembly comprises a hollow air guide pipe arranged at the top of the clamping assembly, and a fixing plate is fixedly installed on the bottom wall of the hollow air guide pipe. In the welding process, airflow scouring is conducted on the non-contact portion of the clamping face of the clamp rod, welding slag is prevented from adhering to the clamping face and solidifying, and the situation that when hydraulic supports of other sizes are fixed subsequently, gaps exist between the clamping face and the surfaces of the supports is further avoided; therefore, the stability of subsequent clamping and the service life of the current positioning clamp are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of engine bracket technology, and in particular to an engine bracket welding positioning fixture. Background Technology

[0002] The engine mount is a core load-bearing component of a vehicle's powertrain. Its function is to stably connect key components such as the engine and transmission to the vehicle body, while also absorbing the vibrations and impacts generated during powertrain operation. During installation, this component can be stably supported and constrained by hydraulic supports. After engine repair, the disassembled engine and its mount need to be re-welded and reinstalled. During the welding process, positioning jigs are used to constrain the position of the engine mount to prevent the welding effect from being affected by factors such as engine mount shaking.

[0003] Currently, after the hydraulic bracket of the engine is constrained by the positioning fixture, welding slag is generated during the welding process. This slag may splatter onto the clamping surface of the positioning fixture. If this is not dealt with in time, the high-temperature slag may solidify on the clamping surface of the fixture. When using the fixture to clamp hydraulic brackets of other sizes, the contact point between the clamping surface and the hydraulic bracket will change due to the different sizes of the hydraulic brackets. If the slag has solidified at the clamping point, it will cause gaps between the clamping surface and the hydraulic bracket, resulting in unstable constraint of the hydraulic bracket. Therefore, it will affect the stability of the engine reinstallation.

[0004] Therefore, it is necessary to invent an engine bracket welding positioning fixture to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an engine bracket welding positioning fixture to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An engine bracket welding positioning fixture includes a support platform and further includes: Two symmetrically arranged support plates are fixedly installed on the left and right sides of the top of the support platform and have reinforcing ribs installed on their surfaces. Each of the two support plates has a clamping assembly at one end near the middle of the support platform. A cleaning assembly is provided at the top of the clamping assembly and a flow guiding assembly is provided at the bottom of the clamping assembly. The cleaning assembly includes a hollow air guide tube disposed on the top of the clamping assembly. A fixing plate is fixedly installed on the bottom wall of the hollow air guide tube. An arc-shaped plate is fixedly connected to the top of the fixing plate. A horizontal plate is fixedly connected to the end of the arc-shaped plate away from the fixing plate. Guide ribs are fixedly connected to the side of the arc-shaped plate and the horizontal plate near the bottom wall of the mounting steel sheet. A perforated flow equalization plate is fixedly connected to the surface of the fixing plate. A communicating groove is opened on the bottom wall of the mounting steel sheet, which is directly opposite the perforated flow equalization plate. A nozzle communicating with the communicating groove is fixedly connected to the bottom end of the hollow air guide tube. A guide grid is fixedly connected inside the nozzle. The flow guiding assembly includes a vertical plate disposed below the clamp bar, an inclined plate fixedly connected to the bottom end of the vertical plate, and an airflow guide block fixedly connected to the top end of the inclined plate.

[0007] Preferably, the clamping assembly includes a support member fixedly connected to the top of the support plate near the middle of the support platform, and a clamping bar is rotatably connected inside the support member, with teeth provided at the end of the clamping bar near the middle of the support member.

[0008] Preferably, a mounting steel plate is fixedly installed on the surface of the clamp bar, and the mounting steel plate is fixedly connected to the other three sides of the clamp bar away from the teeth. A first support rod is fixedly connected to the top of the mounting steel plate, and an electric telescopic rod is fixedly connected to the top of the first support rod. The hollow air guide tube is fixedly connected to the output end of the electric telescopic rod. An inner groove is formed on the surface of the middle part of the hollow air guide tube. The output end of the electric telescopic rod is fixedly connected to the inner wall of the inner groove. A fixing ring is fixedly connected to the surface of the hollow air guide tube. A second support rod is fixedly connected to the top of the mounting steel plate, and a guide rod is fixedly connected to the top of the second support rod. The guide rod is slidably connected inside the fixing ring.

[0009] Preferably, an air delivery pipe is fixedly connected to the surface of the hollow air delivery pipe, the end of the air delivery pipe away from the support is connected to the end of the hollow air delivery pipe away from the support, and the output end of the air pump is fixedly connected to the end of the air delivery pipe away from the hollow air delivery pipe.

[0010] Preferably, the connection between the gas supply pipe and the hollow gas guide pipe faces the side of the arc-shaped plate where the guide rib is provided, and the combination of the fixing plate, the arc-shaped plate and the horizontal plate is distributed at equal distances inside the hollow gas guide pipe, and the height of the multiple fixing plates gradually increases as they move away from the gas supply pipe.

[0011] Preferably, the guide grilles are symmetrically arranged on both sides inside the nozzle. The guide grille at the center of the nozzle has an inclination of five degrees, while the inclination angle of the guide grille at the nozzle edge gradually increases, and the guide grille at the nozzle edge has an inclination of fifteen degrees.

[0012] Preferably, a support frame is fixedly connected to the bottom end of the mounting steel plate, the vertical plate is fixedly connected to the end of the support frame away from the mounting steel plate, and the top end of the vertical plate is fixedly connected to the bottom end of the teeth.

[0013] Preferably, the top of the airflow guide block is tilted at a 45-degree angle toward the end face of the vertical plate, the airflow channel formed by the airflow guide block and the inclined plate is hook-shaped, the top of the airflow guide block gradually approaches the inner wall of the inclined plate in an upward direction, and the end of the inclined plate away from the vertical plate faces the direction of the teeth.

[0014] Compared with the prior art, the present invention provides an engine bracket welding positioning fixture, which has the following beneficial effects: 1. This engine bracket welding positioning fixture uses airflow to flush the non-contact areas of the clamping surface during the welding process, preventing weld slag from adhering to and solidifying on the clamping surface. This further prevents gaps between the clamping surface and the bracket surface when fixing other hydraulic brackets of different sizes, thus ensuring the stability of subsequent clamping and extending the service life of the current positioning fixture.

[0015] 2. The engine bracket welding positioning fixture uses an arc plate, guide ribs and porous flow equalization plate inside the hollow air duct to work together to organize the airflow. The guide grille with a gradually changing angle inside the nozzle expands the airflow coverage area. With the help of an electric telescopic rod to drive the hollow air duct to move back and forth, the fixture can clean the welding slag on the tooth surface without dead corners, prevent the welding slag from solidifying and affecting the subsequent clamping accuracy, and reduce manual cleaning costs.

[0016] 3. The engine bracket welding positioning fixture, through the flow guiding component, through the inclined plate and the multi-guide surface airflow guide block, forms an airflow channel that is hook-shaped, reflecting the downward airflow back to the tooth surface, secondary flushing of dead corner welding slag, significantly improving the utilization rate of compressed air, while avoiding disorderly airflow and reducing energy consumption. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an engine bracket welding positioning fixture proposed in this invention; Figure 2 This is a schematic diagram of the clamping assembly of an engine bracket welding positioning fixture proposed in this invention; Figure 3 This is a schematic diagram of the clamp rod installation structure of an engine bracket welding positioning fixture proposed in this invention; Figure 4 This is a schematic diagram of the clamp bar surface of an engine bracket welding positioning fixture proposed in this invention; Figure 5 This is a schematic diagram of the internal structure of the hollow air guide tube of an engine bracket welding positioning fixture proposed in this invention; Figure 6 This is a schematic diagram of the nozzle structure of an engine bracket welding positioning fixture proposed in this invention; Figure 7 This is a schematic diagram of the flow guiding component of an engine bracket welding positioning fixture proposed in this invention; Figure 8 This is a schematic diagram of the installation structure of the flow guiding component of the engine bracket welding positioning fixture proposed in this invention; Figure 9 This is a schematic diagram of the internal structure of the guide plate of an engine bracket welding positioning fixture proposed in this invention; Figure 10 This is a schematic diagram of the airflow guide block structure of an engine bracket welding positioning fixture proposed in this invention; Figure 11 This is a schematic diagram of the airflow direction of an engine bracket welding positioning fixture proposed in this invention.

[0018] In the diagram: 1. Support platform; 2. Support plate; 3. Reinforcing rib; 4. Clamping assembly; 41. Support component; 42. Clamping bar; 43. Teeth; 5. Cleaning assembly; 501. Mounting steel plate; 502. First support rod; 503. Electric telescopic rod; 504. Hollow air guide pipe; 505. Fixing ring; 506. Second support rod; 507. Guide rod; 508. Air supply pipe; 509. Fixing plate; 510. Arc plate; 511. Horizontal plate; 512. Guide rib; 513. Perforated flow equalization plate; 514. Connecting groove; 515. Nozzle; 516. Guide grid; 6. Flow guiding assembly; 61. Support frame; 62. Vertical plate; 63. Inclined plate; 64. Airflow guide block. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Example 1: Refer to Figures 1-11An engine bracket welding positioning fixture includes a support platform 1 and two symmetrically arranged support plates 2, which are respectively fixedly installed on the left and right sides of the top of the support platform 1 and have reinforcing ribs 3 installed on their surfaces. Each of the two support plates 2 is provided with a clamping component 4 at one end near the middle of the support platform 1. A cleaning component 5 is provided on the top of the clamping component 4 and a flow guiding component 6 is provided on the bottom of the clamping component 4. The cleaning assembly 5 includes a hollow air guide pipe 504 disposed on the top of the clamping assembly 4. A fixing plate 509 is fixedly installed on the bottom wall of the hollow air guide pipe 504. The hollow air guide pipe 504 is positioned directly above the teeth 43 and is used to clean welding slag that may adhere to the surface of the lower teeth 43. An arc-shaped plate 510 is fixedly connected to the top of the fixing plate 509. The arc-shaped plate 510 is a quarter-circle arc. A horizontal plate 511 is fixedly connected to the end of the arc-shaped plate 510 away from the fixing plate 509. A steel plate 5 is installed close to the arc-shaped plate 510 and the horizontal plate 511. A guide rib 512 is fixedly connected to one side of the bottom wall of 01. The guide ribs 512 are evenly spaced in the front and back directions, and the airflow can flow between adjacent guide ribs 512. A perforated flow equalization plate 513 is fixedly connected to the surface of the fixed plate 509. A connecting groove 514 facing the perforated flow equalization plate 513 is opened on the bottom wall of the mounting steel plate 501. A nozzle 515 communicating with the connecting groove 514 is fixedly connected to the bottom end of the hollow air guide pipe 504. A guide grid 516 is fixedly connected inside the nozzle 515. The top of the guide grid 516 is provided with a rounded corner. The flow guiding assembly 6 includes a vertical plate 62 disposed below the clamp bar 42. An inclined plate 63 is fixedly connected to the bottom end of the vertical plate 62, and an airflow guide block 64 is fixedly connected to the top end of the inclined plate 63. The downward flowing airflow will flow back to the surface of the teeth 43 through the guidance of the inclined plate 63 and the airflow guide block 64, thereby cleaning the surface of the teeth 43, thereby improving the utilization efficiency of airflow and the cleaning efficiency of the teeth 43.

[0022] Specifically, after compressed air enters the hollow air guide tube 504, the airflow will blow towards the arc plate 510 and be guided by the arc plate 510 and the horizontal plate 511. At this time, the airflow changes its flow direction along the shape of the guide rib 512 and the arc plate 510. It will then pass through the porous flow equalization plate 513 and flow to the downward connecting groove 514. After that, the airflow will enter the interior of the nozzle 515. Under the guidance of the guide grid 516 inside the nozzle 515, the airflow at the center of the nozzle 515 will flow towards the downward direction, while the airflow at the inner edge of the nozzle 515 will be tilted and blown downward under the guidance of the guide grid 516, thereby increasing the area of ​​airflow.

[0023] Example 2: Refer to Figure 2 - Figure 4 An engine bracket welding positioning fixture, which is basically the same as that in Embodiment 1, but further includes the following: The clamping assembly 4 includes a support member 41 fixedly connected to the top of the support plate 2 near the middle of the support platform 1. A clamping bar 42 is rotatably connected inside the support member 41. The clamping bar 42 is provided with teeth 43 at one end near the middle of the support member 41. The power for the support member 41 to drive the clamping bar 42 to rotate can be either electric or pneumatic.

[0024] A mounting steel plate 501 is fixedly installed on the surface of the clamp bar 42. The mounting steel plate 501 is fixedly connected to the other three sides of the clamp bar 42 away from the teeth 43. A first support rod 502 is fixedly connected to the top of the mounting steel plate 501. An electric telescopic rod 503 is fixedly connected to the top of the first support rod 502. A hollow air guide tube 504 is fixedly connected to the output end of the electric telescopic rod 503. An inner groove is opened on the surface of the middle part of the hollow air guide tube 504. The output end of the electric telescopic rod 503 is fixedly connected to the inner wall of the inner groove. A fixing ring 505 is fixedly connected to the surface of the hollow air guide tube 504. A second support rod 506 is fixedly connected to the top of the mounting steel plate 501. A guide rod 507 is fixedly connected to the top of the second support rod 506. The guide rod 507 is slidably connected inside the fixing ring 505.

[0025] A gas delivery pipe 508 is fixedly connected to the surface of the hollow gas delivery pipe 504. The end of the gas delivery pipe 508 and the end of the hollow gas delivery pipe 504 away from the support member 41 are connected. The end of the gas delivery pipe 508 away from the hollow gas delivery pipe 504 is fixedly connected to the output end of the air pump.

[0026] Specifically, the air pump can be turned on to introduce compressed air into the hollow air guide pipe 504 through the air supply pipe 508. When the nozzle 515 at the bottom of the hollow air guide pipe 504 is used to clean the teeth 43, the area of ​​airflow is increased under the action of the guide grille 516, thus avoiding dead corners on the surface of the teeth 43 that cannot be cleaned. At this time, the electric telescopic rod 503 can be driven to reciprocate and extend cyclically. During the reciprocating extension and retraction of the electric telescopic rod 503, its output end will drive the fixedly connected hollow air guide pipe 504 to move back and forth along the length of the clamp rod 42. At this time, the hollow air guide pipe 504 can drive the nozzle 515 at the bottom to thoroughly clean the teeth 43 below. Furthermore, during the movement of the hollow air tube 504, the fixing ring 505 fixedly installed on its surface always slides on the surface of the guide rod 507, and the guide rod 507 is fixedly installed on the surface of the second support rod 506, thus enabling the hollow air tube 504 to remain stable during reciprocating movement.

[0027] Example 3: Reference Figure 5 - Figure 6 An engine bracket welding positioning fixture, which is basically the same as that in Embodiment 1, but further includes the following: The connection between the gas supply pipe 508 and the hollow air guide pipe 504 is provided with a guide rib 512 facing the arc plate 510. The combination of the fixing plate 509, the arc plate 510 and the horizontal plate 511 is distributed at equal intervals inside the hollow air guide pipe 504. The height of the multiple fixing plates 509 gradually increases as they move away from the gas supply pipe 508. Through the gradually rising horizontal plate 511, the horizontal plate 511 and the arc plate 510 away from the connection between the gas supply pipe 508 and the hollow air guide pipe 504 can also intercept more compressed air, thus preventing the compressed air from being unable to enter the connecting groove 514 on the right side of the hollow air guide pipe 504.

[0028] The guide grilles 516 are symmetrically arranged on both sides inside the nozzle 515. The guide grille 516 located at the center of the nozzle 515 has an inclination of five degrees, while the inclination angle of the guide grille 516 gradually increases towards the edge of the nozzle 515, and the guide grille 516 located at the edge of the nozzle 515 has an inclination of fifteen degrees.

[0029] In actual use, the operator can adjust the number of guide grilles 516 installed inside the nozzle 515. Without affecting the cleaning effect of the airflow on the teeth 43, the airflow can be divided into finer streams by the guide grilles 516, forcing the airflow to flow along the direction of the guide grilles 516, thereby destroying the large-scale vortex structure and making the airflow velocity distribution at the nozzle 515 outlet more uniform.

[0030] Example 4: Reference Figure 7 - Figure 11 An engine bracket welding positioning fixture, which is basically the same as that in Embodiment 1, but further includes the following: A support frame 61 is fixedly connected to the bottom end of the mounting steel plate 501. A vertical plate 62 is fixedly connected to the end of the support frame 61 away from the mounting steel plate 501. The top end of the vertical plate 62 is fixedly connected to the bottom end of the tooth 43. Since the bottom ends of the vertical plate 62 and the tooth 43 are in contact, no gap will be generated, thus preventing airflow from overflowing from the gap.

[0031] The top of the airflow guide block 64 is tilted at an angle of 45 degrees toward the end face of the vertical plate 62. The airflow channel formed by the airflow guide block 64 and the inclined plate 63 is hook-shaped. The top of the airflow guide block 64 gradually approaches the inner wall of the inclined plate 63 in an upward direction. The end of the inclined plate 63 away from the vertical plate 62 faces the tooth 43.

[0032] Specifically, the downward airflow ejected through nozzle 515 first washes the surface of the tooth 43. If welding slag is adhered to the surface of the tooth 43, it will be blown downwards by the airflow because the slag is in a molten state at high temperature. The downward-blown airflow will then contact the end face of the airflow guide block 64 facing the vertical plate 62. Since the distance between the end face of the airflow guide block 64 facing the inclined plate 63 and the inclined plate 63 gradually decreases in the upward direction, the airflow will not preferentially pass through the right side of the airflow guide block 64 and the inclined plate 62. The airflow that enters the inclined plate 63 through the left side of the airflow guide block 64 will flow in the hook-shaped channel and gradually adjust its direction until the airflow is blown out from the top right side of the airflow guide block 64 and the inside of the channel of the inclined plate 63. At the same time, the hollow air guide tube 504 also moves under the action of the electric telescopic rod 503. At this time, the airflow blown from bottom to top will blow again onto the surface of the tooth 43 and be located in the dead corner of the nozzle 515, thereby improving the utilization rate of compressed air and the cleaning efficiency of the tooth 43.

[0033] In actual use, airflow guide blocks 64 with different surfaces can be installed according to the installation positions of the vertical plate 62 and the inclined plate 63. It is only necessary to ensure that the inclination angle between all adjacent surfaces except the two adjacent surfaces at the top of the airflow guide block 64 is less than 15 degrees. This reduces the impact of airflow on the turning point of the airflow channel and also guides the airflow so that the airflow can be reused.

[0034] In this invention, after the operator fixes the engine inside the hydraulic bracket, the hydraulic bracket is placed at the center of the top of the support platform 1. At this time, the drive source inside the support member 41 can drive the clamp rod 42 to rotate. Depending on the size of the hydraulic bracket that fixes the engine, the teeth 43 on the surface of the clamp rod 42 will abut against the surface of the hydraulic bracket at a suitable position, while most of the teeth 43 will not contact the hydraulic bracket. In the subsequent welding process, the operator can use tools such as hydraulic rods to adjust the height of the support platform 1 so that the engine can be installed in the predetermined position for subsequent welding.

[0035] During the welding process, the air pump can be turned on to introduce compressed air into the hollow air guide pipe 504 through the air supply pipe 508. When the nozzle 515 at the bottom of the hollow air guide pipe 504 is used to clean the teeth 43, the area of ​​airflow is increased under the action of the guide grille 516, thus avoiding dead corners on the surface of the teeth 43 that cannot be cleaned. At this time, the electric telescopic rod 503 can be driven to reciprocate and extend cyclically. During the reciprocating extension and retraction of the electric telescopic rod 503, its output end will drive the fixedly connected hollow air guide pipe 504 to move back and forth along the length of the clamp rod 42. At this time, the hollow air guide pipe 504 can drive the nozzle 515 at the bottom to thoroughly clean the teeth 43 below. Furthermore, during the movement of the hollow air tube 504, the fixing ring 505 fixedly installed on its surface always slides on the surface of the guide rod 507, and the guide rod 507 is fixedly installed on the surface of the second support rod 506, thus enabling the hollow air tube 504 to remain stable during reciprocating movement.

[0036] After the compressed air enters the hollow air guide tube 504, the airflow will blow towards the arc plate 510 and be guided by the arc plate 510 and the horizontal plate 511. At this time, the airflow changes its flow direction along the shape of the guide rib 512 and the arc plate 510. It will then pass through the porous flow equalization plate 513 and flow to the downward connecting groove 514. After that, the airflow will enter the interior of the nozzle 515. Under the guidance of the guide grid 516 inside the nozzle 515, the airflow at the center of the nozzle 515 will flow towards the downward direction, while the airflow at the inner edge of the nozzle 515 will be tilted and blown downward under the guidance of the guide grid 516, thereby increasing the area of ​​airflow.

[0037] Furthermore, the downward airflow ejected through nozzle 515 first washes the surface of tooth 43. If welding slag is adhered to the surface of tooth 43 at this time, since the slag is in a molten state at high temperature, the airflow will blow the slag downwards. The downward-blown airflow will then come into contact with the end face of airflow guide block 64 facing the vertical plate 62. Since the distance between the end face of airflow guide block 64 facing the inclined plate 63 and the inclined plate 63 gradually decreases in the upward direction, the airflow will not preferentially pass through the right side of airflow guide block 64 and the inclined plate 62. Within the channel formed by plate 63, the airflow that enters the interior of inclined plate 63 through the left side of airflow guide block 64 will flow within the hook-shaped channel and gradually adjust its direction until the airflow is blown out from the top right side of airflow guide block 64 and the interior of the channel of inclined plate 63. At the same time, hollow air guide tube 504 also moves under the action of electric telescopic rod 503. At this time, the airflow blown from bottom to top will blow again onto the surface of tooth 43 and be located in the dead corner of nozzle 515, thereby improving the utilization rate of compressed air and the cleaning efficiency of tooth 43.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An engine support welding positioning fixture comprising a support table (1), characterized in that, Also include: Two support plates (2) arranged symmetrically, respectively fixedly installed on the left and right sides of the top end of the support table (1) and the surface is installed with reinforcing ribs (3), the top of the two support plates (2) is close to the middle of the support table (1) One end is provided with a clamping assembly (4), the top of the clamping assembly (4) is provided with a cleaning assembly (5), the bottom of the clamping assembly (4) is provided with a flow guide assembly (6); The cleaning assembly (5) comprises a hollow air duct (504) arranged at the top of the clamping assembly (4), the bottom wall of the hollow air duct (504) is fixedly installed with a fixed plate (509), the top end of the fixed plate (509) is fixedly connected with an arc plate (510), the end away from the fixed plate (509) of the arc plate (510) is fixedly connected with a horizontal plate (511), the arc plate (510) and the horizontal plate (511) are fixedly connected with a guide rib (512) on the side close to the bottom wall of the mounting steel sheet (501), the surface of the fixed plate (509) is fixedly connected with a multi-hole flow distribution plate (513), the bottom wall of the mounting steel sheet (501) is provided with a communication groove (514) opposite to the multi-hole flow distribution plate (513), the bottom end of the hollow air duct (504) is fixedly connected with a nozzle (515) in communication with the communication groove (514), the inside of the nozzle (515) is fixedly connected with a guide grille (516); The flow guide assembly (6) comprises a vertical plate (62) arranged below the clamp rod (42), and the bottom end of the vertical plate (62) is fixedly connected with an inclined plate (63), and the top end of the inclined plate (63) is fixedly connected with an airflow guide block (64).

2. An engine support welding fixture as defined in claim 1 wherein, The clamping assembly (4) comprises a support (41) fixedly connected to the top of the end of the support plate (2) close to the middle of the support table (1), the inside of the support (41) is rotatably connected with a clamp rod (42), and the end of the clamp rod (42) close to the middle of the support (41) is provided with a tooth (43).

3. An engine support welding fixture as defined in claim 1 wherein, The surface of the clamp rod (42) is fixedly installed with a mounting steel sheet (501), the mounting steel sheet (501) is fixedly connected to the remaining three surfaces of the clamp rod (42) away from the tooth (43), the top end of the mounting steel sheet (501) is fixedly connected with a first support rod (502), the top end of the first support rod (502) is fixedly connected with an electric telescopic rod (503), the hollow air duct (504) is fixedly connected to the output end of the electric telescopic rod (503), the surface of the middle of the hollow air duct (504) is provided with an inner groove, the output end of the electric telescopic rod (503) is fixedly connected to the inner wall of the inner groove, the surface of the hollow air duct (504) is fixedly connected with a fixed ring (505), the top end of the mounting steel sheet (501) is fixedly connected with a second support rod (506), the top end of the second support rod (506) is fixedly connected with a guide rod (507), and the guide rod (507) is slidingly connected in the inside of the fixed ring (505).

4. An engine support welding fixture as defined in claim 3 wherein, The surface of the hollow air guide pipe (504) is fixedly connected with a gas conveying pipe (508), one end of the gas conveying pipe (508) and the hollow air guide pipe (504) is communicated away from the support (41), and the other end of the gas conveying pipe (508) is fixedly connected with the output end of the air pump.

5. An engine support welding fixture as defined in claim 4 wherein, The connecting part of the gas conveying pipe (508) and the hollow air guide pipe (504) is provided with one side of the guide rib (512) facing the arc-shaped plate (510), the combination of the fixed plate (509), the arc-shaped plate (510) and the horizontal plate (511) is distributed equidistantly inside the hollow air guide pipe (504), and the height of the plurality of fixed plates (509) gradually increases away from the gas conveying pipe (508).

6. An engine support welding fixture as defined in claim 1 wherein, The guide grating (516) is symmetrically arranged on both sides of the nozzle (515), the guide grating (516) located at the center of the nozzle (515) has an inclination of five degrees, the inclination angle of the guide grating (516) gradually increases towards the edge of the nozzle (515), and the guide grating (516) located at the edge of the nozzle (515) has an inclination of fifteen degrees.

7. An engine support welding fixture as defined in claim 3 wherein, The bottom end of the mounting steel sheet (501) is fixedly connected with the support frame (61), the vertical plate (62) is fixedly connected at the end of the support frame (61) away from the mounting steel sheet (501), and the top end of the vertical plate (62) is fixedly connected to the bottom end of the tooth (43).

8. An engine support welding fixture as defined in claim 1 wherein, The inclination angle of the airflow guide block (64) top towards the end face of the vertical plate (62) is forty-five degrees, the airflow passage formed by the airflow guide block (64) and the inclined plate (63) is in the shape of a hook, the end of the airflow guide block (64) top towards the inclined plate (63) gradually approaches the inner wall of the inclined plate (63) in the upward direction, and the end of the inclined plate (63) away from the vertical plate (62) is towards the direction of the tooth (43).

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