Automobile rear floor side beam welding tool

Abstract

The utility model discloses a kind of automobile rear floor side beam welding tool, belong to new energy automobile technical field, for high-precision fixing to automobile rear floor side beam, facilitate subsequent welding process.The tool includes work platform, and first fixed part, first support part, third fixed part are set on work platform;The first fixed part is set at the position of the front part of side beam square tube, for the front part of side beam square tube is fixed in vertical direction;The first support part is set at the position of the rear part of side beam square tube, for the rear part of side beam square tube is supported;Second fixed part includes second pressure head, second pressure head is located directly above first support part, for the front part of profile end cover is applied to down pressure;Third fixed part includes third pressure head, third pressure head and the upper surface of profile cover rear portion abut, and the rear part of profile cover is applied to down pressure.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle technology, specifically to a welding fixture for the rear floor side beam of an automobile. Background Technology

[0002] In recent years, with the rapid growth of the domestic economy and the continuous improvement of people's income levels, cars are no longer a luxury item, and more families are able to purchase cars as a means of transportation. At the same time, increased environmental awareness has further promoted the rise of new energy vehicles, thereby driving the development of the entire automotive industry. The rear floor side beam, located beneath the rear floor of a vehicle, is an important component of the chassis structure. It improves the stability, load-bearing capacity, and shock resistance of the vehicle body, and strengthens the overall rigidity of the body. In actual production, tooling is used to fix the various parts of the rear floor side beam before welding. Existing technical solutions often use conventional tooling for simple positioning of the rear floor side beam before welding, which makes it difficult to guarantee clamping accuracy, resulting in large welding errors, severe post-weld deformation, and a low yield rate. Utility Model Content

[0003] In view of this, the present utility model discloses a welding fixture for the rear floor side beam of an automobile, the specific solution of which is as follows:

[0004] A welding fixture for a rear floor side beam of an automobile includes a side beam square tube, sheet metal parts, a side beam profile, and a profile cover plate. The rear part of the side beam square tube is inserted into the side beam profile, and sheet metal parts are provided on the side surface of the side beam square tube. The profile cover plate is disposed at the upper end of the side beam profile, and its front part is located above the side beam square tube and in contact with the upper end surface of the side beam square tube.

[0005] The welding fixture includes a working platform, and a first fixing part, a first support part, a second fixing part, and a third fixing part disposed on the working platform;

[0006] The first fixing part is located at the front of the side beam square tube and includes a first pressing mechanism, a pin component, and a first pressing head. The first pressing head is disposed on the first pressing mechanism and contacts the upper surface of the side beam square tube, applying downward pressure to the side beam square tube. The pin component is disposed on the first pressing mechanism and located below the side beam square tube. It includes a pin head and a pin base. The pin head is inserted into a circular hole at the bottom of the side beam square tube, and the pin base contacts the lower surface of the side beam square tube, supporting the side beam square tube.

[0007] The first support is located at the rear of the side beam square tube and includes a first support base, a square tube support column, and a side beam profile support block. The square tube support column and the side beam profile support block are both located on the first support base. The upper end of the square tube support column contacts the lower surface of the square tube to support the side beam square tube. The upper end of the side beam profile support block contacts the lower front end of the side beam profile to support the side beam profile.

[0008] The second fixing part includes a second pressing mechanism and a second pressing head; the second pressing head is disposed on the second pressing mechanism and is located directly above the first support part. The second pressing head contacts the upper surface of the profile cover plate and applies downward pressure to the profile cover plate.

[0009] The third fixing part includes a third pressing mechanism and a third pressing head. The third pressing head is disposed on the third pressing mechanism and contacts the upper surface of the rear part of the profile cover plate, applying downward pressure to the rear part of the profile cover plate.

[0010] As a supplement to the technical solution of this utility model, the first pressing mechanism, the second pressing mechanism and the third pressing mechanism have the same structure, all including a pressing mechanism base, a rotating swing arm, a hinged connecting rod, a rotating pressure plate, a Z-shaped connecting piece and a pressing mechanism support seat;

[0011] The pressing mechanism base is located at the rear of the pressing mechanism support. The lower end of the rotating swing arm is hinged to the middle of the pressing mechanism base. The upper end of the hinged connecting rod is hinged to the middle of the rotating swing arm. The lower end of the hinged connecting rod is hinged to the rear of the rotating pressure plate. The rear end of the rotating pressure plate is hinged to the rear end of the pressing mechanism base. The hinge position between the rotating pressure plate and the pressing mechanism base is located above and behind the lower end of the hinged connecting rod. The rear end of the Z-shaped connector is connected to the front end of the rotating pressure plate, so that the rotating swing arm can drive the front end of the Z-shaped connector to move up and down when rotating. The first pressure head, the second pressure head, and the third pressure head are all located at the front end of the Z-shaped connector.

[0012] As a supplement to the technical solution of this utility model, the second fixing part further includes a second fixing part limiting shaft. The second fixing part limiting shaft is disposed on one side of the second pressure head through a connecting block, and the second fixing part limiting shaft is inserted into the through hole on the profile cover plate.

[0013] As a supplement to the technical solution of this utility model, the third fixing part further includes a third fixing part limiting shaft, a third fixing part support base, and a third fixing part pressing block; the third fixing part limiting shaft is set on one side of the third pressing head through a connecting block, and the third fixing part limiting shaft is inserted into the through hole on the profile cover plate;

[0014] The third fixing part support base and the third fixing part lower pressure block are both disposed on the third pressing mechanism. The third fixing part support base is disposed on the pressing mechanism base of the third pressing mechanism, and the third fixing part lower pressure block is disposed on the Z-shaped connector of the third pressing mechanism. The upper end of the third fixing part support base abuts against the lower surface of the profile end cap, and the lower end of the third fixing part lower pressure block abuts against the upper surface of the profile end cap.

[0015] As a supplement to the technical solution of this utility model, a fourth fixing part is also provided on the working platform. The fourth fixing part includes a fourth pressing mechanism and a fourth fixing part pressure head. The fourth fixing part pressure head is provided on the fourth pressing mechanism. The upper surface of the middle part of the profile end cap at the lower end of the fourth fixing part pressure head is in contact with the middle part of the profile end cap, and is used to apply downward pressure to the middle part of the profile end cap. The fourth pressing mechanism has the same structure as the first pressing mechanism.

[0016] As a supplement to the technical solution of this utility model, a fifth fixing part is also included, which is set on the working platform. The fifth fixing part includes a fifth pressing mechanism, a fifth fixing part base, a fifth fixing part limiting shaft, and a fifth fixing part pressure head. The fifth fixing part base is set below the sheet metal part set on the side surface of the square tube of the side beam, and the upper end of the fifth fixing part base contacts the lower end face of the sheet metal part to support the sheet metal part. The fifth fixing part limiting shaft is set on the fifth fixing part base and inserted into the through hole on the sheet metal part.

[0017] The fifth fixing part pressure head is disposed on the fifth pressing mechanism. The fifth fixing part pressure head contacts the upper surface of the sheet metal part and applies downward pressure to the sheet metal part.

[0018] As a supplement to the technical solution of this utility model, a sixth fixing part is also provided on the working platform. The sixth fixing part is the same as the first fixing part, and the sixth fixing part is provided on the working platform and located at the rear of the first fixing part.

[0019] As a supplement to the technical solution of this utility model, it also includes a first limiting part set on the working platform. The first limiting part includes a first telescopic mechanism, a first side limiting block, and a first limiting part limiting shaft. The first side limiting block and the first limiting part limiting shaft are both set on the first telescopic mechanism. The first side limiting block is located on one side of the front part of the side beam profile and abuts against the side surface of the front part of the side beam profile. The first limiting part limiting shaft is inserted into the through hole on the side surface of the side beam profile.

[0020] The first support portion further includes a first support portion limiting block, which is disposed on the base of the first support portion and is located on the side of the side beam profile away from the first limiting portion. The upper end of the first support portion limiting block abuts against the side surface of the side beam profile.

[0021] As a supplement to the technical solution of this utility model, it also includes a second limiting part and a third limiting part disposed on the working platform;

[0022] The second limiting part and the third limiting part are disposed opposite to each other on both sides of the side beam profile and are located at the rear of the side beam profile;

[0023] The second limiting part includes a second telescopic mechanism, a second side limiting block, and a second limiting part limiting shaft; the second side limiting block and the second limiting part limiting shaft are both disposed on the second telescopic mechanism, the second side limiting block abuts against the side surface of the rear part of the side beam profile to apply a clamping force to the side surface of the rear part of the side beam profile, and the second limiting part limiting shaft is inserted into a through hole on the side surface of the side beam profile;

[0024] The third limiting part includes a third side limiting block, which abuts against the side surface of the edge beam profile.

[0025] As a supplement to the technical solution of this utility model, the first telescopic mechanism and the second telescopic mechanism have the same structure, both including a telescopic mechanism base, a guide shaft, a telescopic block, a telescopic shaft, a telescopic handle, a telescopic connecting rod, and a sleeve.

[0026] The guide shaft is mounted on the base of the telescopic mechanism, and a guide sleeve is provided on the support of the telescopic mechanism. The guide shaft passes through the guide sleeve, and its front end is connected to the telescopic block.

[0027] The sleeve is set on the side surface of the guide sleeve. The telescopic shaft passes through the sleeve, with one end fixedly connected to the telescopic block and the other end hinged to the first end of the telescopic connecting rod. The front end of the telescopic handle is hinged to the guide sleeve, and the second end of the telescopic connecting rod is hinged to the front part of the telescopic handle. When the telescopic handle rotates with its front end as the axis, the telescopic shaft is driven to telescopically move towards the profile edge beam through the telescopic connecting rod.

[0028] Beneficial effects: This utility model, through the provision of a first fixing part, a first supporting part, a second fixing part, and a third fixing part, can fix and limit the side beam square tube, side beam profile, and side beam end cap that make up the rear floor side beam, thereby improving the assembly and fixing accuracy and stability. In another aspect of this utility model, a fourth fixing part applies downward pressure to the middle position of the profile end cap, and a fifth fixing part is provided to fix the sheet metal part provided on one side of the side beam square tube. The first limiting part, the second limiting part, and the third limiting part limit and fix the side surfaces of the square tube and the side beam profile, thereby improving the overall accuracy.

[0029] In summary, the welding fixture disclosed in this utility model can improve the pass rate of welding the rear floor edge beam and reduce the scrap rate; it can be adjusted during the assembly process according to the errors in the processing of each part, has strong applicability, and reduces the impact of errors in the processing of parts on the assembly product. Attached Figure Description

[0030] Figure 1 This is a top view of the structure of this utility model.

[0031] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0032] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0033] Figure 4 This is a schematic diagram of the rear floor side beam structure of a car.

[0034] Figure 5 This is a schematic diagram of the first fixing part of this utility model.

[0035] Figure 6 This is a schematic diagram of the first support part of this utility model.

[0036] Figure 7 This is a schematic diagram of the first support part and the side beam of the rear floor of the vehicle according to the present invention.

[0037] Figure 8 This is a schematic diagram of the second fixing part of this utility model.

[0038] Figure 9 This is a schematic diagram of the third fixing part of this utility model.

[0039] Figure 10 This is a schematic diagram of the fourth fixing part of this utility model.

[0040] Figure 11 This is a schematic diagram of the fifth fixing part of this utility model.

[0041] Figure 12 This is a schematic diagram of the first limiting part of this utility model.

[0042] Figure 13 This is a schematic diagram of the second and third limiting parts of this utility model.

[0043] Figure 14 This is a schematic diagram of the first pressing mechanism of this utility model.

[0044] Figure 15 This is a cross-sectional view of the first pressing mechanism of this utility model.

[0045] Figure 16 This is a schematic diagram of the first telescopic mechanism of this utility model.

[0046] In the diagram: 100. Work platform;

[0047] 200. First fixing part; 201. First pressing mechanism; 202. Ejector pin component; 203. First pressing head; 204. First support block;

[0048] 300. First support part; 301. First support part base; 302. Square tube support column; 303. Edge beam profile support block; 304. First support part limiting block;

[0049] 400. Second fixing part; 401. Second pressing mechanism; 402. Second pressing head; 403. Limiting shaft of the second fixing part;

[0050] 500. Third fixing part; 501. Third pressing mechanism; 502. Third pressing head; 503. Limiting shaft of the third fixing part; 504. Support base of the third fixing part; 505. Lower pressing block of the third fixing part;

[0051] 600. Fourth fixing part; 601. Fourth clamping mechanism; 602. Press head of the fourth fixing part;

[0052] 700. Fifth fixing part; 701. Fifth pressing mechanism; 702. Base of fifth fixing part; 703. Limiting shaft of fifth fixing part; 704. Pressing head of fifth fixing part;

[0053] 800. Sixth fixing part;

[0054] 900. First limiting part; 901. First telescopic mechanism; 902. First side limiting block; 903. Limiting shaft of the first limiting part;

[0055] 1000. Second limiting part; 1001. Second telescopic mechanism; 1002. Second side limiting block; 1003. Limiting shaft of the second limiting part;

[0056] 1100. Third limiting part;

[0057] 1200. Clamping mechanism base; 1201. Rotary swing arm; 1202. Hinge connecting rod; 1203. Rotary pressure plate; 1204. Z-type connector; 1205. Clamping mechanism support seat;

[0058] 1300. Telescopic mechanism base; 1301. Guide shaft; 1302. Telescopic block; 1303. Telescopic shaft; 1304. Telescopic handle; 1305. Telescopic connecting rod; 1306. Sleeve; 1307. Guide sleeve;

[0059] 1400. Rear floor side beam of automobile, 1401. Square tube of side beam, 1402. Sheet metal parts, 1403. Side beam profile, 1404. Profile cover plate. Detailed Implementation

[0060] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] like Figures 1 to 16 As shown, a welding fixture for the rear floor side beam of an automobile is used to fix the rear floor side beam 1400 of the automobile to facilitate subsequent welding processes.

[0063] The rear floor side beam 1400 of the vehicle includes a side beam square tube 1401, a sheet metal part 1402, a side beam profile 1403, and a profile cover plate 1404.

[0064] The end of the side beam square tube 1401 is inserted into the side beam profile 1403, and the bottom of the side beam square tube 1401 is provided with a round hole. The side surface of the side beam square tube 1401 is provided with a sheet metal part 1402, and the sheet metal part 1402 is provided with a vertical through hole.

[0065] The profile cover plate 1404 is disposed on the upper end of the side beam profile 1403, with its front part located above the side beam square tube 1401 and in contact with the upper end face of the side beam square tube 1401. The front part of the profile cover plate 1404 is provided with a first end cap through hole, and the rear part of the profile cover plate 1404 is provided with a second end cap through hole.

[0066] The side beam profile 1403 has a first through hole on the front side surface and a second through hole on the rear side surface.

[0067] The welding fixture for the rear floor side beam 1400 of the automobile includes a work platform 100, and a first fixing part 200, a first support part 300, a third fixing part 500, a fourth fixing part 600, and a fifth fixing part 700 disposed on the work platform 100.

[0068] The rear floor side beam 1400 of the car is set on the work platform 100, and the lower end of the side beam profile 1403 is located on the work platform 100, so that the work platform supports the side beam profile 1403. The side beam square tube 1401 is located above the work platform 100.

[0069] The first fixing part 200 is located at the front of the side beam square tube 1401 and includes a first pressing mechanism 201, a pin component 202, a first pressing head 203, and a first support block 204. The first pressing head 203 is mounted on the first pressing mechanism 201 and contacts the upper surface of the side beam square tube 1401, applying downward pressure to the side beam square tube 1401. The pin component 202 is mounted on the first pressing mechanism 201 and includes a pin head and a pin base. The pin head is mounted on the pin base, and the width of the pin base is greater than the diameter of the bottom circular hole of the side beam square tube 1401. The pin head is inserted into the bottom circular hole of the side beam square tube 1401, and the pin base supports the side beam square tube 1401. The pin component 202 can position the side beam square tube 1401 and prevent its position from shifting. The first support block 204 is disposed on the first pressing mechanism 201 and located below the profile square tube. The upper end of the first support block 204 abuts against the lower surface of the profile square tube, and is used to further support the profile square tube.

[0070] The first support portion 300 is located at the rear of the side beam square tube 1401 and includes a first support base 301, a square tube support column 302, and a side beam profile support block 303. The square tube support column 302 is mounted on the first support base 301, and its upper end supports the lower end face of the side beam square tube 1401. The side beam profile support block 303 is also mounted on the first support base 301, and its upper end supports the lower front end of the side beam profile 1403. The first support portion 300 provides support at the connection point between the side beam square tube 1401 and the side beam profile 1403, preventing dimensional deviations between the two connections.

[0071] The second fixing part 400 includes a second clamping mechanism 401 and a second pressure head 402. The second pressure head 402 is disposed on the second clamping mechanism 401, located directly above the first support part 300, and in contact with the upper surface of the profile cover plate 1404, applying downward pressure to the profile cover plate 1404. The second pressure head 402 cooperates with the first support part 300 to apply clamping force at the contact position between the profile cover plate 1404 and the side beam square tube 1401.

[0072] The third fixing part 500 includes a third pressing mechanism 501 and a third pressing head 502. The third pressing head 502 is disposed on the third pressing mechanism 501 and applies downward pressure to the rear part of the profile cover plate 1404.

[0073] The lower end of the rear of the side beam profile 1403 is located on the working platform 100, and the working platform 100 provides support for the rear of the side beam profile 1403.

[0074] By setting the first fixing part 200, the first support part 300, the second fixing part 400, and the third fixing part 500, the side beam square tube 1401, the side beam profile 1403, and the side beam cover plate are limited to ensure their assembly accuracy.

[0075] As a preferred embodiment of the utility model, the first pressing mechanism 201, the second pressing mechanism 401, and the third pressing mechanism 501 have the same structure, each including a pressing mechanism base 1200, a rotating swing arm 1201, a hinged connecting rod 1202, a rotating pressure plate 1203, a Z-shaped connector 1204, a pressing mechanism support 1205, and a downward pressure limiting block. The pressing mechanism base is located at the rear of the pressing mechanism support 1205. The lower end of the rotating swing arm 1201 is hinged to the middle of the pressing mechanism base 1200, allowing the rotating swing arm 1201 to rotate relative to the pressing mechanism base 1200 with its lower end as the axis. The upper end of the hinged connecting rod 1202 is hinged to the middle of the rotating swing arm 1201, the lower end of the hinged connecting rod 1202 is hinged to the rear of the rotating pressure plate 1203, and the rear end of the rotating pressure plate 1203 is hinged to the rear end of the pressing mechanism base 1200. like Figure 14 , Figure 15 As shown, the rotating pressure plate 1203 is hinged to the base 1200 of the pressing mechanism at a position located above and behind the lower end of the hinged connecting rod 1202. With this configuration, when the rotating arm 1201 rotates, the hinged connecting rod 1202 drives the front end of the rotating pressure plate 1203 to move upwards or downwards. The Z-shaped connector 1204 has a Z-shaped structure, and its rear end is connected to the front end of the rotating pressure plate 1203. The first pressure head 203, the second pressure head 402, and the third pressure head 502 are all located at the front end of the Z-shaped connector 1204.

[0076] The Z-shaped connector 1204 includes a first crossbeam, a second crossbeam, and a first vertical beam. One end of the first crossbeam is connected to the front end of the rotating arm 1201, the other end of the first crossbeam is connected to the lower end of the first vertical beam, and one end of the second crossbeam is connected to the upper end of the first vertical beam. The first crossbeam, second crossbeam, and first vertical beam form a Z-shaped structure. The downward pressure limiting block is disposed on the clamping mechanism support 1205 and is located both in front of the clamping mechanism base 1200 and below the first vertical beam. The first pressure head 203 in the first fixing part 200, the second pressure head 402 in the second fixing part 400, and the third pressure head 502 in the third fixing part 500 are all disposed at the front end of the second crossbeam of the Z-shaped connector 1204. When the rotating arm 1201 rotates, the downward pressure limiting block can restrict the downward movement of the Z-shaped connector 1204, preventing the pressure heads from applying excessive downward pressure to the rear floor side beam 1400 of the vehicle, thus preventing deformation due to stress.

[0077] It should be noted that, in addition to the above-mentioned structures, the first pressing mechanism 201, the second pressing mechanism 401, and the third pressing mechanism 501 can also be replaced by cylinders, oil cylinders, and other mechanisms capable of lifting and lowering. All of the above structures are within the protection scope of this utility model.

[0078] As a supplement to the above technical solution, the second fixing part 400 further includes a second fixing part limiting shaft 403. The second fixing part limiting shaft 403 is disposed on the second pressure head 402 via a connecting block and is located on one side of the second pressure head 402. The second fixing part limiting shaft 403 is inserted into the first through hole of the end cap of the profile cover plate 1404. By setting the second fixing part limiting shaft 403, the profile cover plate 1404 is limited, thereby improving the positioning accuracy.

[0079] As a supplement to the above technical solution, the third fixing part 500 further includes a third fixing part limiting shaft 503, a third fixing part support base 504, and a third fixing part pressing block 505. The third fixing part limiting shaft 503 is disposed on the third pressing head 502 via a connecting block and is located on one side of the third pressing head 502. The third fixing part limiting shaft 503 is inserted into the second through hole of the end cap of the profile cover plate 1404. By setting the third fixing part limiting shaft 503, the profile cover plate 1404 is further limited, improving the positioning accuracy. The third fixing part support base 504 and the third fixing part lower pressure block 505 are both disposed on the third clamping mechanism 501. Specifically, the support base of the third fixing part 500 is disposed on the clamping mechanism base 1200 of the third clamping mechanism 501, and the lower pressure block 505 is disposed on the Z-shaped connector 1204 of the third clamping mechanism 501. When the Z-shaped connector 1204 of the third clamping mechanism 501 moves downward, it drives the lower pressure block 505 of the third fixing part to clamp the profile end cap, thereby achieving the clamping of the rear end of the profile end cap by the third fixing part support base 504 and the lower pressure block 505. The third fixing part support base 504 is completely in contact with the lower surface of the profile end cap, and the lower pressure block 505 is completely in contact with the upper surface of the profile end cap, increasing the contact area and improving the clamping effect.

[0080] As a supplement to the technical solution of this utility model, a fourth fixing part 600 is also included. The fourth fixing part 600 includes a fourth pressing mechanism 601 and a fourth fixing part pressure head 602. The fourth fixing part pressure head 602 is disposed on the fourth pressing mechanism 601 and is located above the middle of the profile end cap, used to apply downward pressure to the middle of the profile end cap. The lower end face of the fourth fixing part pressure head 602 is in contact with the surface of the profile end cap, increasing the contact area between the two.

[0081] The fourth pressing mechanism 601 has the same structure as the first pressing mechanism 201, and the fourth fixing part pressing head 602 is disposed at the front end of the Z-shaped connector 1204 of the fourth pressing mechanism 601.

[0082] As a supplement to the technical solution of this utility model, a fifth fixing part 700 is also included. The fifth fixing part 700 includes a fifth pressing mechanism 701, a fifth fixing part base 702, a fifth fixing part limiting shaft 703, and a fifth fixing part pressure head 704. The fifth fixing part base 702 is disposed below the sheet metal part 1402 disposed on the side surface of the side beam square tube 1401, and the upper end of the fifth fixing part base 702 contacts the lower end surface of the sheet metal part 1402, for supporting part of the sheet metal part 1402. The fifth fixing part limiting shaft 703 is disposed on the fifth fixing part base 702 and inserted into the through hole on the sheet metal part 1402 to further limit the sheet metal part 1402. The fifth fixing head 704 is disposed on the fifth clamping mechanism 701 and located above the sheet metal part 1402. It is used to apply downward pressure to the sheet metal part 1402, and cooperates with the fifth fixing base 702 to clamp the sheet metal part 1402, thereby fixing and limiting the sheet metal part 1402. The fifth clamping mechanism 701 has the same structure as the first clamping mechanism 201.

[0083] As a supplement to the technical solution of this utility model, a sixth fixing part 800 is also included. The sixth fixing part 800 is the same as the first fixing part 200, and the sixth fixing part 800 is disposed on the working platform 100 and located at the rear of the first fixing part 200. It is used to further fix and limit the side beam square tube 1401 and improve the fixing accuracy.

[0084] As a preferred technical solution of this utility model, it also includes a first limiting part 900. The first limiting part 900 includes a first telescopic mechanism 901, a first side limiting block 902, and a first limiting part limiting shaft 903. The first side limiting block 902 and the first limiting part limiting shaft 903 are both disposed on the first telescopic mechanism 901. The first telescopic mechanism 901 can drive the first side limiting block 902 and the first limiting part limiting shaft 903 to move toward or away from the side beam profile 1403.

[0085] The first side limiting block 902 is located on one side of the front part of the side beam profile 1403, and is used to apply a clamping force to the side surface of the front part of the side beam profile 1403 in a direction away from the first limiting part 900. The limiting shaft 903 of the first limiting part is inserted into the first through hole on the side beam profile 1403 to position the side beam profile 1403.

[0086] The first support portion 300 also includes a first support portion limiting block 304, which is disposed on the first support portion base 301. It is located on the side of the side beam profile 1403 away from the first limiting portion 900, and the upper end of the first support portion limiting block 304 abuts against the side surface of the side beam profile 1403.

[0087] The front end of the side beam profile 1403 is clamped and fixed by the first support limiting block 304 and the first limiting part 900, thereby improving the positioning accuracy and structural stability.

[0088] As a preferred embodiment of this utility model, it also includes a second limiting part 1000 and a third limiting part 1100.

[0089] The second limiting part 1000 and the third limiting part 1100 are disposed opposite to each other on both sides of the side beam profile 1403 and are located at the rear of the side beam profile 1403.

[0090] The second limiting part 1000 includes a second telescopic mechanism 1001 and a second side limiting block 1002. The second side limiting block 1002 and the second limiting part limiting shaft 1003 are both disposed on the second telescopic mechanism 1001. The second telescopic mechanism 1001 can drive the second side limiting block 1002 and the second limiting part limiting shaft 1003 to move towards or away from the side beam profile 1403. The second side limiting block 1002 is located on one side of the rear portion of the side beam profile 1403 and is used to apply a clamping force to the side surface of the rear portion of the side beam profile 1403. The second limiting part limiting shaft 1003 is inserted into a through hole on the side surface of the side beam profile 1403 to position the side beam profile 1403.

[0091] The third limiting part 1100 includes a third side limiting block, which abuts against the side surface of the side beam profile 1403. By setting the second limiting part 1000 and the third limiting part 1100, the rear part of the side beam profile 1403 is clamped and fixed.

[0092] As a preferred technical solution of this utility model, the first telescopic mechanism 901 and the second telescopic mechanism 1001 have the same structure, both including a telescopic mechanism base 1300, a guide shaft 1301, a telescopic block 1302, a telescopic shaft 1303, a telescopic handle 1304, a telescopic connecting rod 1305, and a sleeve 1306.

[0093] The guide shaft 1301 is mounted on the telescopic mechanism base 1300. A guide sleeve 1307 is provided on the telescopic mechanism support. The guide shaft 1301 passes through the guide sleeve 1307, and its front end is connected to the telescopic block 1302. A sleeve 1306 is mounted on the side surface of the guide sleeve 1307. The telescopic shaft 1303 passes through the sleeve 1306, with one end fixedly connected to the telescopic block 1302 and the other end hinged to the first end of the telescopic connecting rod 1305. The front end of the telescopic handle 1304 is hinged to the guide sleeve 1307, and the hinge position between the telescopic handle 1304 and the guide sleeve 1307 is located behind the sleeve 1306. The second end of the telescopic connecting rod 1305 is hinged to the front part of the telescopic handle 1304, so that when the telescopic handle 1304 rotates with its front end as the axis, the telescopic connecting rod 1305 drives the telescopic shaft 1303 to telescopically extend or retract towards the profile edge beam. The guide shaft 1301 is used to improve the overall stability during the telescopic process.

[0094] It should be noted that the first telescopic mechanism 901 and the second telescopic mechanism 1001 can also be replaced by cylinders, hydraulic cylinders and other mechanisms capable of telescopic movement, such as motor rack and pinion mechanisms.

[0095] The above description is only a preferred embodiment of the present invention, but the protection scope 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 included within the protection scope of the present invention.

Claims

1. A welding fixture for a rear floor side beam of an automobile, the rear floor side beam (1400) comprising a side beam square tube (1401), a sheet metal part (1402), a side beam profile (1403), and a profile cover plate (1404), wherein the rear part of the side beam square tube (1401) is inserted into the side beam profile (1403), and the side surface of the side beam square tube (1401) is provided with the sheet metal part (1402); the profile cover plate (1404) is disposed at the upper end of the side beam profile (1403), and its front part is located above the side beam square tube (1401) and in contact with the upper end face of the side beam square tube (1401). Its features are, The welding fixture includes a work platform (100), and a first fixing part (200), a first support part (300), a second fixing part (400), and a third fixing part (500) disposed on the work platform (100); The first fixing part (200) is located at the front of the side beam square tube (1401) and includes a first pressing mechanism (201), a pin component (202), and a first pressing head (203). The first pressing head (203) is located on the first pressing mechanism (201) and contacts the upper surface of the side beam square tube (1401) to apply downward pressure to the side beam square tube (1401). The pin component (202) is located on the first pressing mechanism (201) and below the side beam square tube (1401). It includes a pin head and a pin base. The pin head is inserted into the round hole at the bottom of the side beam square tube (1401), and the pin base contacts the lower surface of the side beam square tube (1401) to support the side beam square tube (1401). The first support part (300) is located at the rear of the side beam square tube (1401) and includes a first support part base (301), a square tube support column (302), and a side beam profile support block (303). The square tube support column (302) and the side beam profile support block (303) are both located on the first support part base (301). The upper end of the square tube support column (302) contacts the lower surface of the square tube to support the side beam square tube (1401). The upper end of the side beam profile support block (303) contacts the lower front end of the side beam profile (1403) to support the side beam profile (1403). The second fixing part (400) includes a second pressing mechanism (401) and a second pressing head (402); the second pressing head (402) is disposed on the second pressing mechanism (401) and is located directly above the first support part (300). The second pressing head (402) contacts the upper surface of the profile cover plate (1404) and applies downward pressure to the profile cover plate (1404). The third fixing part (500) includes a third pressing mechanism (501) and a third pressing head (502). The third pressing head (502) is disposed on the third pressing mechanism (501). The third pressing head (502) contacts the upper surface of the rear part of the profile cover plate (1404) and applies downward pressure to the rear part of the profile cover plate (1404).

2. The welding fixture for the rear floor edge beam of an automobile according to claim 1, characterized in that, The first pressing mechanism (201), the second pressing mechanism (401) and the third pressing mechanism (501) have the same structure, each including a pressing mechanism base (1200), a rotating swing arm (1201), a hinged connecting rod (1202), a rotating pressure plate (1203), a Z-shaped connector (1204) and a pressing mechanism support seat (1205); The pressing mechanism base (1200) is located at the rear of the pressing mechanism support (1205). The lower end of the rotating arm (1201) is hinged to the middle of the pressing mechanism base (1200), the upper end of the hinged connecting rod (1202) is hinged to the middle of the rotating arm (1201), the lower end of the hinged connecting rod (1202) is hinged to the rear of the rotating pressure plate (1203), and the rear end of the rotating pressure plate (1203) is hinged to the rear end of the pressing mechanism base (1200). The hinge position of the plate (1203) and the base (1200) of the pressing mechanism is located at the rear upper end of the lower end of the hinge link (1202). The rear end of the Z-shaped connector (1204) is connected to the front end of the rotating pressure plate (1203), so that when the rotating arm (1201) rotates, it can drive the front end of the Z-shaped connector (1204) to make lifting and lowering movements. The first pressure head (203), the second pressure head (402), and the third pressure head (502) are all located at the front end of the Z-shaped connector (1204).

3. The welding fixture for the rear floor edge beam of an automobile according to claim 1, characterized in that, The second fixing part (400) also includes a second fixing part limiting shaft (403), which is disposed on one side of the second pressure head (402) via a connecting block, and the second fixing part limiting shaft (403) is inserted into the through hole on the profile cover plate (1404).

4. The welding fixture for the rear floor edge beam of an automobile according to claim 2, characterized in that, The third fixing part (500) further includes a third fixing part limiting shaft (503), a third fixing part support base (504), and a third fixing part pressing block (505); the third fixing part limiting shaft (503) is disposed on one side of the third pressing head (502) through a connecting block, and the third fixing part limiting shaft (503) is inserted into the through hole on the profile cover plate (1404); The third fixing part support base (504) and the third fixing part lower pressure block (505) are both disposed on the third pressing mechanism (501). The third fixing part (500) support base is disposed on the pressing mechanism base (1200) of the third pressing mechanism (501). The third fixing part lower pressure block (505) is disposed on the Z-shaped connector (1204) of the third pressing mechanism (501). The upper end of the third fixing part (500) support base abuts against the lower surface of the profile end cap, and the lower end of the third fixing part lower pressure block (505) abuts against the upper surface of the profile end cap.

5. The welding fixture for the rear floor edge beam of an automobile according to claim 1, characterized in that, It also includes a fourth fixing part (600) disposed on the working platform (100). The fourth fixing part (600) includes a fourth pressing mechanism (601) and a fourth fixing part pressing head (602). The fourth fixing part pressing head (602) is disposed on the fourth pressing mechanism (601). The lower end of the fourth fixing part pressing head (602) contacts the upper surface of the middle part of the profile end cap and is used to apply downward pressure to the middle part of the profile end cap. The fourth pressing mechanism (601) has the same structure as the first pressing mechanism (201).

6. The welding fixture for the rear floor edge beam of an automobile according to claim 1, characterized in that, It also includes a fifth fixing part (700) disposed on the work platform (100), the fifth fixing part (700) including a fifth pressing mechanism (701), a fifth fixing part base (702), a fifth fixing part limiting shaft (703), and a fifth fixing part pressing head (704); the fifth fixing part base (702) is disposed below the sheet metal part (1402) disposed on the side surface of the side beam square tube (1401), and the upper end of the fifth fixing part base (702) contacts the lower end face of the sheet metal part (1402) for supporting the sheet metal part (1402); the fifth fixing part limiting shaft (703) is disposed on the fifth fixing part base (702) and inserted into the through hole on the sheet metal part (1402); The fifth fixing part pressure head (704) is disposed on the fifth pressing mechanism (701). The fifth fixing part pressure head (704) contacts the upper surface of the sheet metal part (1402) and applies downward pressure to the sheet metal part (1402).

7. The welding fixture for the rear floor edge beam of an automobile according to claim 1, characterized in that, It also includes a sixth fixing part (800) disposed on the work platform (100), the sixth fixing part (800) being the same as the first fixing part (200), and the sixth fixing part (800) being disposed on the work platform (100) and located at the rear of the first fixing part (200).

8. The welding fixture for the rear floor edge beam of an automobile according to claim 1, characterized in that, It also includes a first limiting part (900) disposed on the work platform (100). The first limiting part (900) includes a first telescopic mechanism (901), a first side limiting block (902), and a first limiting part limiting shaft (903). The first side limiting block (902) and the first limiting part limiting shaft (903) are both disposed on the first telescopic mechanism (901). The first side limiting block (902) is located on one side of the front part of the side beam profile (1403) and abuts against the side surface of the front part of the side beam profile (1403). The first limiting part limiting shaft (903) is inserted into a through hole on the side surface of the side beam profile (1403). The first support part (300) further includes a first support part limiting block (304), which is disposed on the first support part base (301) and is located on the side of the side beam profile (1403) away from the first limiting part (900). The upper end of the first support part limiting block (304) abuts against the side surface of the side beam profile (1403).

9. The welding fixture for the rear floor edge beam of an automobile according to claim 8, characterized in that, It also includes a second limiting part (1000) and a third limiting part (1100) disposed on the work platform (100); The second limiting part (1000) and the third limiting part (1100) are disposed opposite to each other on both sides of the side beam profile (1403) and are located at the rear of the side beam profile (1403); The second limiting part (1000) includes a second telescopic mechanism (1001), a second side limiting block (1002), and a second limiting part limiting shaft (1003); the second side limiting block (1002) and the second limiting part limiting shaft (1003) are both disposed on the second telescopic mechanism (1001), the second side limiting block (1002) abuts against the side surface of the rear part of the side beam profile (1403) to apply a clamping force to the side surface of the rear part of the side beam profile (1403), and the second limiting part limiting shaft (1003) is inserted into a through hole on the side surface of the side beam profile (1403); The third limiting part (1100) includes a third side limiting block, which abuts against the side surface of the side beam profile (1403).

10. The welding fixture for the rear floor side beam of an automobile according to claim 9, characterized in that, The first telescopic mechanism (901) and the second telescopic mechanism (1001) have the same structure, both including a telescopic mechanism base (1300), a guide shaft (1301), a telescopic block (1302), a telescopic shaft (1303), a telescopic handle (1304), a telescopic connecting rod (1305), and a sleeve (1306); The guide shaft (1301) is mounted on the telescopic mechanism base (1300), and the telescopic mechanism support is provided with a guide sleeve (1307). The guide shaft (1301) passes through the guide sleeve (1307), and its front end is connected to the telescopic block (1302). The sleeve (1306) is disposed on the side surface of the guide sleeve (1307). The telescopic shaft (1303) passes through the sleeve (1306), with one end fixedly connected to the telescopic block (1302) and the other end hinged to the first end of the telescopic connecting rod (1305). The front end of the telescopic handle (1304) is hinged to the guide sleeve (1307), and the second end of the telescopic connecting rod (1305) is hinged to the front part of the telescopic handle (1304). When the telescopic handle (1304) rotates with its front end as the axis, the telescopic shaft (1303) is driven to perform telescopic movement toward the profile edge beam through the telescopic connecting rod (1305).

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