A high-precision, flexible conveyor skid for truck welding lines

Abstract

The present invention discloses a high-precision and flexible truck welding line conveying sled, including a sled frame, at least one sliding positioning device for cooperating with the front end of the longitudinal beam of the vehicle body is respectively arranged on the left and right sides of the front end of the sled frame, and a supporting positioning device for supporting and positioning the rear end of the vehicle body floor is respectively arranged on the left and right sides of the rear end of the sled frame; the sliding positioning device includes a positioning device support fixed on the sled frame, a slider positioning mechanism arranged on the positioning device support, which includes a sliding sleeve fixed on the positioning device support and a slider slidably arranged in the sliding sleeve, a positioning pin for cooperating with the vehicle body for positioning is fixed on the slider, and the slider can be positioned in the sliding sleeve through a positioning rod structure. Through the sliding positioning device and the supporting positioning device, the conveying sled can be applied to the precise conveying of various varieties and differentiated vehicle bodies, and has good practicality and market application value.

Description

Technical Field

[0001] The invention relates to the technical field of automobile body manufacturing equipment, in particular to a high-precision and flexible truck welding line conveying skid. Background Art

[0002] In the process of manufacturing the white body of heavy trucks, customers require personalized models. At the same time, in order to reduce investment costs and gain market share, automobile factories need to produce multiple varieties, small batches, and highly differentiated products on one production line. The skid is a conveying device between the fixtures of each station of the line, and a positioning device corresponding to the car body is arranged on it. Therefore, in order to meet the requirements of accurate conveying of multiple varieties and differentiated car bodies, how to design a skid that meets the requirements of conveying multiple varieties and differentiated car bodies is a current problem.

[0003] Patent No. CN114733676A discloses a flexible sled for body painting, including a sled body, a stopper, and a length adjustment mechanism. The stopper and the length adjustment mechanism are detachably mounted on the front and rear ends of the longitudinal beam of the sled body, respectively. The length adjustment mechanism includes a lifting device and an adjustment arm. The adjustment arm is parallel to the longitudinal beam, and at least two lifting devices are axially distributed on the adjustment arm. The lifting device includes a stopper shaft and a stopper. The stopper is connected to the stopper shaft. When the stopper shaft is lifted and lowered, it drives the stopper to move to a corresponding position to interfere with the stopper in the horizontal direction. This flexible sled for body painting can flexibly adjust the length of the sled, better adapt to the application of different body painting links, effectively save space, and avoid waste of production lines and energy.

[0004] Patent number CN114434071A discloses a flexible device and positioning method for multiple vehicle models in a body repair welding line, including a flexible slide, a positioning base, a positioning unit, a loading mechanism, a transfer and conveying mechanism, a sorting mechanism, and a storage library; the flexible slide, the loading mechanism, and the storage library are sequentially arranged from the positioning point to the outside in the transverse direction, and more than two positioning bases are arranged longitudinally on the flexible slide, and the positioning unit is installed on the positioning base. The problem of positioning compatibility bottleneck of multiple vehicle models in the repair welding line is solved, and it can be infinitely compatible. The switching station is arranged in the air, which can effectively utilize the space and does not affect the arrangement of other welding stations in the production line.

[0005] Patent No. CN217045200U discloses a flexible slide for a body-in-white repair welding line, including a slide body, a positioning base and a positioning unit. The positioning base is arranged on the slide body and the number is set to four. The four positioning bases are respectively arranged below the four positioning points of the body-in-white corresponding to the slide body. Each positioning base includes more than three positioning frames arranged longitudinally, and each positioning base also includes a positioning unit arranged on any one of the positioning frames. The present invention solves the problem of insufficient vehicle compatibility. The combination of the slide body, the positioning base and the positioning unit can produce a variety of vehicle models compatibly.

[0006] Patent No. CN113602754A discloses a technical field of conveying equipment for automobile production lines, discloses a flexible sled support and a method of using the same, wherein the sled support comprises a sled support base, a displacement locking mechanism is provided with a displacement slider slidably mounted along the X-axis direction, the displacement slider is provided with a lower displacement locking block, the displacement locking mechanism is provided with a sled fixed support along the Y-axis direction through the displacement slider, a sled movable support is provided above the displacement locking mechanism along the X-axis direction, one end of the sled movable support is rotatably connected to the sled support base, the other end of the sled movable support is a movable support end, the movable support end extends to the outside of one end of the displacement locking mechanism, the sled movable support is provided with a first displacement groove and a second displacement groove movably engaged with the lower displacement locking block, the first displacement groove is located lower than the second displacement groove, and the displacement slider is provided with a displacement rod extending along the Y-axis direction. The flexible sled support and the method of using the same of the present invention can realize fast switching, meet the production cycle requirements, and have low manufacturing costs.

[0007] Patent number CN216566530U discloses a variable-distance flexible slide for automobile welding production lines, which belongs to slides for automobile welding production lines. The stacking positioning pin is fixedly connected to the front end of the slide body, the body positioning pins are fixed on the rear positioning pin support and the front positioning pin support respectively, the guide block is fixedly connected to the top of the slide body, after the positioning slider is adjusted to the position, it is fixedly connected to the screw hole on the guide block by screws passing through the hole on the guide block, the bottom of the rear positioning pin support and the front positioning pin support are fixedly connected to the positioning slider respectively, the rear support seat of the body is fixedly connected to the rear of the slide body, and the rear support rod of the body is fixedly connected to the rear support seat of the body by bolts. The advantages are novel structure, stable and reliable positioning, and the rear support rod of the body can be locally adjusted according to the shape of the vehicle model, which solves the problem of poor versatility of various vehicle models in the welding slide, can be compatible with different vehicle models, reduce waste, and realize multi-product mixed flow production.

[0008] The above-mentioned patents have the following shortcomings: 1. The structure of the line-body mixed-flow vehicle that the positioning device can adapt to does not change much, and the body chassis that it carries does not change much. The body chassis is basically a straight structure and should belong to the same series of vehicles. 2. All the above-mentioned solutions with positioning pins do not mention the accuracy and accuracy repair of the sled. 3. The accuracy of the parts transported by the sled cannot be guaranteed. Summary of the invention

[0009] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and provide a truck welding line conveying skid that meets the requirements of accurate conveying of multiple varieties and differentiated car bodies.

[0010] To achieve this purpose, the high-precision and flexible truck welding line conveying sled designed in the present invention includes a sled frame, and at least one sliding positioning device for cooperating with the front end of the vehicle body longitudinal beam is respectively arranged on the left and right sides of the front end of the sled frame, and a supporting positioning device for supporting and positioning the rear end of the vehicle body floor is respectively arranged on the left and right sides of the rear end of the sled frame; the sliding positioning device includes a positioning device support fixed on the sled frame, and a slider positioning mechanism arranged on the positioning device support, which includes a sliding sleeve fixed on the positioning device support and a slider slidably arranged in the sliding sleeve, a positioning pin for cooperating with the vehicle body for positioning is fixed on the slider, and the slider can be positioned in the sliding sleeve through a positioning rod structure.

[0011] Furthermore, the slider positioning mechanism includes a support plate fixed to the top of the positioning device support along the width direction of the slide frame, the sliding sleeve is fixed to the support plate along the width direction of the slide frame, the slider is arranged in the sliding sleeve along the length direction of the sliding sleeve, and the upper and lower inner surfaces of the sliding sleeve are sliding groove surfaces that slide with the upper and lower side surfaces of the slider.

[0012] Furthermore, a plurality of slider positioning grooves are provided at intervals along the length direction of the slider on the top, and a positioning rod structure cooperating with the slider positioning groove is fixed on the sliding sleeve, which includes a positioning rod support fixed on the sliding sleeve and a positioning rod coaxially arranged in the positioning rod support, and the bottom end of the positioning rod can pass through the positioning rod support and be arranged in any one of the slider positioning grooves of the slider.

[0013] Furthermore, a spring in a compressed state is arranged in the positioning rod support, the lower end of the positioning rod coaxially passes through the spring and is fixed to the lower end of the spring, and a positioning rod handle is fixed to the top end of the positioning rod.

[0014] Furthermore, a positioning pin support seat is fixed on the sliding block, and the positioning pin includes a first positioning pin and a second positioning pin fixed on the positioning pin support seat, located on the front and rear sides of the support plate, and cooperating with the longitudinal beam of the vehicle body, and a longitudinal beam support block for supporting the longitudinal beam of the vehicle body is fixed between the first positioning pin and the second positioning pin.

[0015] Furthermore, the top surface of the longitudinal beam support block is a stepped support surface arranged along the width direction of the skid frame.

[0016] Furthermore, the supporting and positioning device includes a longitudinal beam rear end support located on the outside of the skid frame and a floor rear cross beam support located on the inside of the skid frame; the longitudinal beam rear end support includes a longitudinal beam rear end support seat fixed on the skid frame and a cross plate support assembly fixed on the top of the longitudinal beam rear end support seat; the floor rear cross beam support includes a floor rear cross beam support seat fixed on the skid frame and a cross plate hinge assembly hingedly connected to the top of the floor rear cross beam support seat and lockable to the top of the floor rear cross beam support seat.

[0017] Furthermore, the cross plate support assembly includes a support cross plate extending along the width direction of the skid frame and toward the outside of the skid frame, one side of which is fixed to the top of the rear end support seat of the longitudinal beam, and a support bracket fixed to the top of the other end of the support cross plate and used to support the rear end of the longitudinal beam of the vehicle body.

[0018] Furthermore, the cross plate hinge assembly includes a hinged straight plate arranged along the length direction of the skid frame and hingedly connected to the top of the floor rear cross beam support seat on one side, a floor rear cross beam support plate is fixed to the other side of the hinged straight plate, and a support slot for supporting the floor rear cross beam is opened in the middle of the floor rear cross beam support plate.

[0019] Furthermore, a locking frame is fixed to the top of the rear cross beam support seat of the floor, and a locking plate is hingedly connected to the rear of the locking frame. The locking plate and the locking frame can form a limit frame that cooperates with one end of the hinged straight plate to limit the rotation of the hinged straight plate around its hinge point.

[0020] The beneficial effects of the present invention are as follows: In the present invention, the sliding positioning device and the supporting positioning device are used in combination, wherein the sliding positioning device is designed based on the sliding sleeve and the slider, and by arranging a supporting structure and a positioning structure that cooperate with the longitudinal beam of the vehicle body on the slider, and cooperating with the sliding of the slider, the supporting structure and the positioning structure can meet the support and installation positioning of various vehicle body floors. The supporting structure and the positioning structure themselves also have a three-way adjustment function, which further meets the positioning and support requirements of vehicle body floors of different sizes and improves the assembly accuracy of the vehicle body floor. The supporting positioning device can meet the support and positioning requirements of the rear cross beams of vehicle body floors of different heights. In summary, through the sliding positioning device and the supporting positioning device, the conveying skid can be used for the precise conveying of multiple varieties and differentiated vehicle bodies, and has good practicality and market application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The truck welding line conveying skid designed by the present invention is a three-dimensional Figure 1 ;

[0022] Figure 2 The truck welding line conveying skid designed by the present invention is a three-dimensional Figure 2 ;

[0023] Figure 3 A three-dimensional diagram of the sliding positioning device of the sled designed for the present invention;

[0024] Figure 4 A three-dimensional diagram of the slider positioning mechanism designed for the present invention;

[0025] Figure 5 A three-dimensional diagram of a slider positioning mechanism designed for the present invention without a sliding sleeve;

[0026] Figure 6 A top perspective view of the rear crossbeam support of the bottom plate of the present invention;

[0027] Figure 7 It is a schematic diagram of the top state switching of the rear cross beam support of the bottom plate in the present invention;

[0028] Figure 8 This is a front view of the truck welding line conveying skid in the present invention being arranged on a roller bed;

[0029] Among them, 1—positioning device support, 2—sleeve, 3—slider, 4—support plate, 5—slider positioning groove, 6—positioning rod support, 7—positioning rod, 8—positioning rod handle, 9—first positioning pin, 10—second positioning pin, 11—first positioning pin fixing seat, 12—sled, 13—positioning pin support seat, 14—longitudinal beam support block, 15—second positioning pin fixing seat, 16—first L-shaped block, 17—vertical block, 18—adjusting pad block, 19—second L-shaped block (19.1—first horizontal section, 19.2—second horizontal section), 20—horizontal block, 21—left longitudinal beam front end support, 22—right longitudinal beam front end support, 23—left longitudinal beam Rear end support, 24—right longitudinal beam rear end support, 25—floor rear beam left support, 26—command issuing plate, 27—guide plate, 28—skid body clamping block, 29—reference hole, 30—sled frame, 31—floor rear beam right support, 32—longitudinal beam rear end support seat, 33—floor rear beam support seat, 34—support cross plate, 35—support bracket, 36—hinged straight plate, 37—floor rear beam support plate, 38—support slot, 39—locking frame, 40—locking plate, 41—roller bed, 42—roller, 43—retaining wheel, 44—double pressure arm cylinder, 45—arrival sensor, 46—slow speed sensor, 47—deceleration sensor. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] like Figure 1 —7 shows a high-precision and flexible truck welding line conveying skid, comprising a skid frame 30, wherein the front end left and right sides of the skid frame 30 are respectively provided with a sliding positioning device for cooperating with the front end of the longitudinal beam of the vehicle body for positioning, and the sliding positioning device comprises a left longitudinal beam front end support 21 and a right longitudinal beam front end support 22. The rear end left and right sides of the skid frame 30 are respectively provided with a supporting positioning device for supporting and positioning the rear end of the vehicle body floor; the supporting positioning device comprises a longitudinal beam rear end support (including a left longitudinal beam rear end support 23 and a right longitudinal beam rear end support 24) located outside the skid frame 30 and a floor rear cross beam support (including a floor rear cross beam left support 25 and a floor rear cross beam right support 31) located inside the skid frame 30.

[0032] like Figure 1 As shown in FIG. 5 , the sliding positioning device includes a positioning device support 1 fixed on a slide 12, and a slider positioning mechanism arranged on the positioning device support 1, which includes a support plate 4 fixed on the top of the positioning device support 1, a sleeve 2 fixed on the support plate 4 and a slider 3 slidably arranged in the sleeve 2, a positioning pin for cooperating with the vehicle body for positioning is fixed on the slider 3, and the slider 3 is positioned in the sleeve 2 by a positioning rod structure.

[0033] like Figure 3 As shown in FIG. 5 , the sleeve 2 is fixed on the support plate 4 in the horizontal direction, a slide groove is provided in the middle of the sleeve 2, and the slider 3 is arranged in the sleeve 2 along the length direction of the sleeve 2. The inner surfaces of the upper and lower sides of the sleeve 2 are slide groove surfaces that slide with the upper and lower side surfaces of the slider 3. The top of the slider 3 is provided with a plurality of slider positioning grooves 5 spaced apart along its length direction, and a positioning rod structure that cooperates with the slider positioning grooves 5 is fixed on the sleeve 2, which includes a positioning rod support 6 fixed on the sleeve 2 and a positioning rod 7 coaxially arranged in the positioning rod support 6, a spring in a compressed state is coaxially arranged in the positioning rod support 6, the lower end of the positioning rod 7 coaxially passes through the spring and is fixed to the lower end of the spring, a positioning rod handle 8 is fixed on the top of the positioning rod 7, and the bottom end of the positioning rod 7 can pass through the positioning rod support 6 and be arranged in any one of the slider positioning grooves 5 of the slider 3. Through the cooperation of the positioning rod 7 and the slider positioning groove 5, the front and rear positions of the slider 3 can be adjusted, and the positioning rod 7 can be inserted into different slider positioning grooves 5 for different vehicle models.

[0034] A positioning pin support seat 13 is fixed on the slider 3, and the positioning pins include a first positioning pin 9 and a second positioning pin 10 located at the front and rear sides of the support plate 4 and matched with the longitudinal beam of the vehicle body, and a longitudinal beam support block 14 for supporting the longitudinal beam of the vehicle body is fixed between the first positioning pin 9 and the second positioning pin 10. The top surface of the longitudinal beam support block 14 is a stepped support surface.

[0035] The middle part of the first locating pin 9 is coaxially fixed in the first locating pin fixing seat 11, and the first locating pin fixing seat 11 is fixed on the longitudinal beam support block 14. The first locating pin fixing seat 11 and the locating pin support seat 13 are connected by a three-way adjustment structure that can adjust the first locating pin fixing seat 11 in the X direction, the Y direction and the Z direction: the three-way adjustment structure includes a vertically placed first L-shaped block 16, the bottom surface of the horizontal section of the first L-shaped block 16 is fixed on the locating pin support seat 14, a vertical block 17 is fixed on the side surface of the vertical section of the first L-shaped block 16 close to the support plate 4, and the first locating pin fixing seat 11 is fixed on the side surface of the vertical block 17 away from the support plate 14; one or more adjustment pads 18 are detachably fixed between the first L-shaped block 16 and the locating pin support seat 13, between the first L-shaped block 16 and the vertical block 17, and between the vertical block 17 and the first locating pin fixing seat 13. The positions of the first locating pin 9 and the locating pin support seat 14 are adjusted by fixing one or more adjusting pads 18 between the first L-shaped block 16 and the locating pin support seat 13, between the first L-shaped block 16 and the vertical block 17, and between the vertical block 17 and the first locating pin fixing seat 13.

[0036] like Figure 3 As shown, the middle part of the second locating pin 10 is coaxially fixed in the second locating pin fixing seat 15, and the second locating pin fixing seat 15 is connected to the first locating pin fixing seat 11 (or the longitudinal beam support block 14) through a two-way adjustment structure that can adjust the second locating pin fixing seat 15 in the X direction and the Y direction. The two-way adjustment structure includes a horizontally placed second L-shaped block 19, which includes a first horizontal section 19.1 arranged parallel to the support plate 4 and a second horizontal section 19.2 perpendicular to the first horizontal section 19.1. The side surface of the first horizontal section 19.1 close to the support plate 4 is fixed to the longitudinal beam support block 14, and the side surface of the second horizontal section 19.2 away from the support plate 4 is fixed with a horizontal block 20, and the second locating pin fixing seat 15 is fixed to the horizontal block 20; one or more adjustment pads 18 are detachably fixed between the first horizontal section 19.1 and the longitudinal beam support block 14 and between the second horizontal section 19.2 and the horizontal block 20.

[0037] like Figure 1 As shown in FIG. 2 , the rear end support of the longitudinal beam includes a rear end support seat 32 of the longitudinal beam fixed on the skid frame 30 and a cross plate support assembly fixed on the top of the rear end support seat 32 of the longitudinal beam. The cross plate support assembly includes a support cross plate 34 extending along the width direction of the skid frame 30 and toward the outside of the skid frame 30, with one side fixed to the top of the rear end support seat 32 of the longitudinal beam, and a support bracket 35 fixed to the top of the other end of the support cross plate 34 and used to support the rear end of the longitudinal beam of the vehicle body. The support bracket 35 can be fine-tuned in the length direction of the support cross plate 34.

[0038] like Figure 1 —2 and Figure 6As shown in FIG. 7 , the floor rear cross beam support includes a floor rear cross beam support seat 33 fixed on the sled frame 30 and a cross plate hinge assembly hingedly connected to the top of the floor rear cross beam support seat 33 and lockable to the top of the floor rear cross beam support seat 33. The cross plate hinge assembly includes a hinged straight plate 36 arranged along the length direction of the sled frame 30, one side of which is hingedly connected to the top of the floor rear cross beam support seat 33, a floor rear cross beam support plate 37 is fixed to the other side of the hinged straight plate 36, and a support slot 38 for supporting the floor rear cross beam is provided in the middle of the floor rear cross beam support plate 37. A locking frame 39 is fixed to the top of the floor rear cross beam support seat 33, and a locking plate 40 is hingedly connected to the rear of the locking frame 39. The locking plate 40 and the locking frame 39 can enclose a limit frame that cooperates with one end of the hinged straight plate 36 to limit the rotation of the hinged straight plate 36 around its hinge point.

[0039] Embodiment 2:

[0040] Another sliding positioning device of the sled of the present invention has a generally similar structure to that of the first embodiment, except that the number of the first positioning pin 9 and the number of the second positioning pin 10 are both more than one. One or more positioning pins are designed for longitudinal beams of different structures to meet different longitudinal beam positioning requirements, and the positioning pins are designed to be detachable.

[0041] Embodiment 3:

[0042] Another sliding positioning device of a skid of the present invention has an overall structure that is basically the same as that of Example 1, except that the number of longitudinal beam support blocks 14 is more than one. One or more longitudinal beam support blocks 14 are designed for longitudinal beams of different structures to meet different longitudinal beam support requirements, and the longitudinal beam support blocks 14 are all designed to be detachable structures.

[0043] like Figure 1 —2 is a stereoscopic diagram of a slide structure designed based on a slider positioning mechanism. The right side of the front end of the slide 12 is a sliding positioning device designed according to Example 1 of the present invention, and the front end of the right longitudinal beam of the vehicle body floor is positioned by the first positioning pin 9 and the second positioning pin 10. The left side of the slide 12 is a slider positioning mechanism designed according to Example 2 or Example 3 of the present invention, and the front end of the left longitudinal beam of the vehicle body floor is positioned by multiple positioning pins and multiple longitudinal beam support blocks 14. The slider positioning device is used in conjunction with the left longitudinal beam rear end support 23, the right longitudinal beam rear end support 24, the floor rear cross beam left support 25 and the floor rear cross beam right support 31 at the rear end of the slide 12 to meet the support and positioning requirements of vehicle body floors of various models and sizes. The left longitudinal beam rear end support 23 and the right longitudinal beam rear end support 24 are used to support the rear ends of the left and right longitudinal beams of the vehicle body floor. As shown Figure 6 As shown in FIG. 7 , by adjusting the positions of the hinged straight plate 36 of the left support 25 of the floor rear cross beam and the right support 31 of the floor rear cross beam, the positioning requirements of the rear cross beams of the vehicle body floor of different heights can be adapted.

[0044] like Figure 1 —2 and Figure 8 As shown, the instruction issuing plate 26 of the sled 12 is provided with an in-position sensor 45, a slow speed sensor 46 and a deceleration sensor 47, which are used to trigger the roller bed in-position proximity switch to detect the sled in-position, and the roller bed 41 goes from high speed to deceleration and finally stops in position. After the instruction issuing plate 26 turns on the proximity switch on the roller bed 41, the roller bed 41 stops conveying. The guide plate 27 is located on both sides of the sled frame 30, and the roller 43 of the roller bed 41 limits the sled 12 in the X direction through the guide plate 27 to prevent the sled 12 from deviating in the X direction. After the double pressure arm cylinder 44 of the roller bed 41 clamps the skid body clamping block 28, the Y position of the sled 12 is controlled. Three reference holes 29 are provided on the sled 12, and a three-coordinate reference is established through the three reference holes, and the positioning pins and the support bracket 35 of the sled 12 are adjusted to ensure the accuracy of the positioning pin position. If the three-coordinate system detects that the X-direction positioning pin at the front end of the sled 12 does not meet the vehicle body accuracy, the direction of the sled 12 can be corrected by fine-tuning the guide plates 27 and the wheels 43 on the left and right sides of the sled 12 .

[0045] There is a positional tolerance between the position of the sled body clamping block 28 and the reference hole 29. After the roller bed 41 transports the sled 12 to its position, the double-pressure arm cylinder 44 of the roller bed 41 clamps the sled body clamping block 28 to ensure that the sled 12 does not deviate in the Y direction and the part can fall into the fixture. If the part does not fall into the fixture, check whether the locating pin is within the vehicle body coordinate system through the three-coordinate reference established on the sled 12. Fine-tune the two pressure blocks on the double-pressure arm cylinder 44 to control the Y forward and backward position of the sled 12 so that the locating pin meets the positioning requirements of the vehicle body coordinate system. The coordinate system established through the reference hole 29 can also be used to restore the accuracy of the sled body.

[0046] The sliding positioning device and the supporting positioning device designed in the present invention are used in combination, wherein the sliding positioning device is designed based on the sliding sleeve 2 and the slider 3. By setting a supporting structure and a positioning structure that cooperate with the longitudinal beam of the vehicle body on the slider 3, and cooperating with the sliding of the slider 3, the supporting structure and the positioning structure can meet the support and installation positioning of various vehicle body floors. The supporting structure and the positioning structure themselves also have a three-way adjustment function, which further meets the positioning and support requirements of vehicle body floors of different sizes and improves the assembly accuracy of the vehicle body floor. The supporting positioning device can meet the support and positioning requirements of the rear cross beams of the vehicle body floor of different heights. In summary, through the sliding positioning device and the supporting positioning device, the conveying skid can be used for the precise conveying of multiple varieties and differentiated vehicle bodies, and has good practicality and market application value.

[0047] It should be noted here that the description of the above technical solutions is exemplary, and this specification can be embodied in different forms and should not be interpreted as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the present invention thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In the case of using "including", "having" and "comprising" described in this specification, there may also be another part or other parts, and the terms used may generally be singular but may also represent plural forms. In addition, the technical solutions of the present invention are limited only by the scope of the claims. Finally, it should be pointed out that the above embodiments are only more representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there may be many variations. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall be deemed to belong to the protection scope of the present invention.

Claims

1. A high-precision, flexible conveying sled for a truck welding line, comprising a sled frame (30), characterized in that: At least one sliding positioning device for cooperating with the front end of the longitudinal beam of the vehicle body is respectively provided on the left and right sides of the front end of the slide frame (30), and a supporting positioning device for supporting and positioning the rear end of the vehicle body floor is respectively provided on the left and right sides of the rear end of the slide frame (30); the sliding positioning device comprises a positioning device support (1) fixed to the slide frame (30), a slider positioning mechanism arranged on the positioning device support (1), and the slider positioning mechanism comprises a sliding sleeve (2) fixed to the positioning device support (1) and a slider (3) slidably arranged in the sliding sleeve (2), a positioning pin for cooperating with the vehicle body for positioning is fixed on the slider (3), and the slider (3) can be positioned in the sliding sleeve (2) through a positioning rod structure; the slider positioning mechanism comprises a positioning device support (1) fixed to the positioning device support (1) along the width direction of the slide frame (30); ) at the top of the slide frame (30), the slide sleeve (2) is fixed on the support plate (4) along the width direction of the slide frame (30), the slider (3) is arranged in the slide sleeve (2) along the length direction of the slide sleeve (2), and the upper and lower inner surfaces of the slide sleeve (2) are slide groove surfaces that are slidably matched with the upper and lower surface of the slider (3); the top of the slider (3) is provided with a plurality of slider positioning grooves (5) spaced apart along its length direction, and the slide sleeve (2) is fixed with a positioning rod structure that is matched with the slider positioning groove (5), which comprises a positioning rod support (6) fixed on the slide sleeve (2) and a positioning rod (7) coaxially arranged in the positioning rod support (6), and the bottom end of the positioning rod (7) can pass through the positioning rod support (6) and be arranged in any one of the slider positioning grooves (5) of the slider (3).

2. The high-precision, flexible truck welding line conveying skid according to claim 1, characterized in that: A spring in a compressed state is arranged in the positioning rod support (6), the lower end of the positioning rod (7) coaxially passes through the spring and is fixed to the lower end of the spring, and a positioning rod handle (8) is fixed to the top end of the positioning rod (7).

3. The high-precision, flexible truck welding line conveying skid according to claim 1, characterized in that: A positioning pin support seat (13) is fixed on the slider (3), and the positioning pin comprises a first positioning pin (9) and a second positioning pin (10) which are fixed on the positioning pin support seat (13), are located on the front and rear sides of the support plate (4), and cooperate with the longitudinal beam of the vehicle body, and a longitudinal beam support block (14) for supporting the longitudinal beam of the vehicle body is fixed between the first positioning pin (9) and the second positioning pin (10).

4. The high-precision, flexible truck welding line conveying skid according to claim 3, characterized in that: The top surface of the longitudinal beam support block (14) is a stepped support surface arranged along the width direction of the skid frame (30).

5. The high-precision, flexible truck welding line conveying skid according to claim 1, characterized in that: The support positioning device comprises a longitudinal beam rear end support located on the outside of the slide frame (30) and a floor rear cross beam support located on the inside of the slide frame (30); the longitudinal beam rear end support comprises a longitudinal beam rear end support seat (32) fixed on the slide frame (30) and a cross plate support assembly fixed on the top of the longitudinal beam rear end support seat (32); the floor rear cross beam support comprises a floor rear cross beam support seat (33) fixed on the slide frame (30) and a cross plate hinge assembly hingedly connected to the top of the floor rear cross beam support seat (33) and lockable to the top of the floor rear cross beam support seat (33).

6. The high-precision, flexible truck welding line conveying skid according to claim 5, characterized in that: The cross-plate support assembly comprises a support cross-plate (34) extending along the width direction of the slide frame (30) and outward from the slide frame (30), one side of which is fixed to the top of the longitudinal beam rear end support seat (32), and a support bracket (35) fixed to the top of the other end of the support cross-plate (34) and used to support the rear end of the longitudinal beam of the vehicle body.

7. The high-precision, flexible truck welding line conveying skid according to claim 5, characterized in that: The cross plate hinge assembly comprises a hinged straight plate (36) arranged along the length direction of the sled frame (30) and hingedly connected on one side to the top of the floor rear cross beam support seat (33); a floor rear cross beam support plate (37) is fixed on the other side of the hinged straight plate (36); and a support slot (38) for supporting the floor rear cross beam is provided in the middle of the floor rear cross beam support plate (37).

8. The high-precision, flexible truck welding line conveying skid according to claim 7, characterized in that: A locking frame (39) is fixed to the top of the floor rear cross beam support seat (33), and a locking plate (40) is hingedly connected to the rear of the locking frame (39). The locking plate (40) and the locking frame (39) can form a limit frame that cooperates with one end of the hinged straight plate (36) and limits the rotation of the hinged straight plate (36) around its hinge point.

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