Compressed garbage truck welding production series positioning device
The modular positioning device enables quick assembly and disassembly, solving the problem that existing tooling cannot adapt to hooks of different sizes, and improving the production efficiency and stability of welding hooks for compressed garbage trucks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- QING DAO ZHONG QI TE ZHONG QI CHE YOU XIAN GONG SI
- Filing Date
- 2025-11-27
- Publication Date
- 2026-04-17
AI Technical Summary
The existing welding fixtures for the hooks of compactor garbage trucks cannot be flexibly adjusted to accommodate hooks of different sizes, resulting in inflexible operation, poor versatility, and reduced production efficiency.
A modular positioning device was designed, comprising a main frame, mounting frame, mounting clamps, and disassembly/assembly mechanism. It achieves quick disassembly and assembly through limiting components and snap-fit parts, adapting to the welding requirements of hooks of different sizes.
It improves the versatility and flexibility of tooling, shortens downtime when changing hook models, ensures the stability of hooks during the welding process, and improves overall welding production efficiency.
Smart Images
Figure CN121870376A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of positioning tooling technology, specifically relating to a series of positioning devices for welding production of compressed garbage trucks. Background Technology
[0002] In waste sorting and centralized collection and treatment, compressed garbage trucks are one of the main processing equipment. To ensure the consistent quality requirements of this product, a series of positioning devices were designed and manufactured for the welding positioning of key parts, which has achieved efficient and high-quality positioning welding.
[0003] Among the many components of a garbage truck, hooks constitute a relatively large proportion. Due to the large number of hooks, their welding process takes up the longest time in the entire production process, making it one of the key factors affecting the welding efficiency of garbage truck components. Currently, the assembly and welding fixtures commonly used in hook welding are mostly one-piece structures. This one-piece structure can ensure a certain level of stability and welding quality when welding a single type of hook. However, its drawbacks become apparent when assembling different types of hooks. Because the one-piece structure has fixed dimensions, it cannot be flexibly adjusted according to the specifications of different hook sizes, making it difficult to meet the requirements for accurate insertion and welding of hooks of various sizes. This forces workers to spend extra time and effort to handle the mismatch between the fixture and the hook during actual operation, significantly reducing the flexibility and versatility of operation, and thus affecting overall production efficiency. Summary of the Invention
[0004] The purpose of this invention is to provide a series of positioning devices for welding production of compressed garbage trucks, so as to solve the problem mentioned in the background art that existing positioning devices cannot make corresponding adjustments according to parts of different sizes.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a positioning device for welding production of compressed garbage trucks, the positioning device comprising a main frame, a mounting frame, a mounting fixture, and a disassembly and assembly mechanism; The top of the main frame is provided with a slot for placing the mounting frame; The disassembly and assembly mechanism includes a limiting component and a snap-fit component; The limiting component consists of a connector and a limiting component; The limiting members are provided in multiple locations and are distributed on both sides and the top of the main frame slot; the connecting member connects all the limiting members and drives the limiting members to limit or separate the mounting frame when the connecting member moves laterally back and forth. The snap-fit component is located on one side of the top of the main frame. When the snap-fit component is inserted downward into the connector, it drives the limiting component to lock and limit the mounting frame. When the snap-fit component is pulled upward, it drives the connector to separate the limiting component from the mounting frame. The surface of the mounting frame is provided with a slot for accommodating the mounting fixture. Both the inner wall of the mounting fixture and the inner wall of the slot are provided with screw holes, which can be used to assemble and fix the two together with bolts. In later use, the mounting fixture can be replaced when it wears out. Since the mounting fixture in this position has a long wear cycle and low replacement frequency, bolts are used for fixing.
[0006] As a preferred technical solution of the present invention, the connecting member includes a connecting rod, a pull rod, a lever, and an end rod; The connecting rods are symmetrically arranged on both sides of the bottom of the main frame, with one end of the connecting rod in the direction of the snap-fit extending vertically upward. The pull rod is provided in multiple parts, and its bottom end is rotatably mounted on the outside of the connecting rod via a shaft. The pull rod is connected to some of the limiting components. The lever is located at the other end of the connecting rod, and the bottom end of the lever is also rotatably connected to the connecting rod via a shaft. The top of the lever is fixed with an outward protruding post, which is connected to a portion of the limiting component. The end rod is integrally formed at the top of the vertically extending end of the connecting rod, and one end of the end rod connects the connecting rods on both sides of the main frame into one piece. The snap-fit component is inserted between the end rod and the end face of the main frame, and the other end of the end rod is connected to a portion of the limiting component.
[0007] As a preferred technical solution of the present invention, the other end of the connecting rod is also fixed with a vertical plate. The bottom of the lever is rotatably connected to the vertical plate through a shaft, thereby avoiding the bottom from abutting against the fixed seat and causing movement obstruction when the lever rotates. Furthermore, a pin fixed on the main frame passes through the middle of the lever, and the lever rotates around the axis of the pin, wherein the pin is not shown in the figure.
[0008] As a preferred technical solution of the present invention, the limiting member includes an end limiting plate one, a side limiting plate, and an end limiting plate two; The end limiting plate is fixedly connected to the other end of the end rod, and the end limiting plate moves in the same direction as the end rod. The side limiting plates are provided in multiple ways, and each side limiting plate is rotatably connected to the top of a single pull rod. The side limiting plates move vertically up and down as the pull rod swings. The second end limiting plate is connected to the protruding post. The second end limiting plate moves horizontally under the swing of the lever. The direction of movement of the second end limiting plate is opposite to that of the first end limiting plate, so as to realize the relative movement of the first end limiting plate and the second end limiting plate, thereby achieving the purpose of clamping the mounting frame.
[0009] As a preferred technical solution of the present invention, at least two horizontal limiting grooves are provided on the surface of the end limiting plate; The side limiting plate is provided with at least two inclined grooves, which are inclined toward the direction of the snap-fit component. The surface of the end limiting plate 2 is provided with at least two horizontal limiting grooves 2 and one vertical groove; The vertical groove is penetrated by the protruding post at the top of the lever; bolts are inserted into the interior of the first limiting groove, the inclined groove and the second limiting groove; the side of the main frame is provided with screw holes for the bolts to be screwed in; by setting the bolts, the first end limiting plate and the second end limiting plate can be moved horizontally, and the side limiting plate can be moved in an inclined direction along the inclined groove it has opened.
[0010] As a preferred technical solution of the present invention, the snap-fit component includes a snap-fit block, a connecting plate, and a side rod; The snap-fit block is vertical, with a snap-fit plate formed on its outer surface. A snap-fit groove with a bottom opening is formed between the snap-fit plate and the snap-fit block, and the snap-fit groove formed by the snap-fit plate and the snap-fit block is fastened to the end rod, thereby limiting the end rod. When the end rod is limited, the position of the entire limiting component is also limited, and there will be no change in position. The top of the snap-fit block is horizontally bent and forms a horizontal plate, which is placed on the top of the main frame. A pull post is also fixed at the bottom of the snap-fit block, and the bottom end of the pull post forms a limiting head. The connecting plate is located below the snap-fit block and is connected to the limiting head; The two ends of the side rod are rotatably connected to the side of the connecting plate and the side of the end rod, respectively.
[0011] As a preferred technical solution of the present invention, the top of the connecting plate has a downward-facing insertion hole, and the limiting head slides up and down within the insertion hole. In the initial installation, two separate plates can be spliced or welded together to form the connecting plate. Before assembling the connecting plate, the pull column and the limiting head are placed in the insertion hole. The top opening of the insertion hole is recessed and is locked in place by the limiting head. Near the top opening of the insertion hole, an inwardly bulging annular protrusion is formed. The longitudinal section of the annular protrusion is triangular. When the pull column follows the locking block... After being lifted synchronously, the limiting head will move upward within the socket until it contacts the bottom surface of the annular protrusion. At this point, the end rod will separate from the slot between the snap-fit plate and the snap-fit block. When the snap-fit block is then pulled up, the limiting head will press against the annular protrusion. Due to the force required to pull the limiting component, the limiting head will press against the annular protrusion and move to the top of the annular protrusion. When the snap-fit block is pressed down, the limiting head will first press against the annular protrusion to lower the connecting plate. Then, the end rod will return to its initial position through the connecting plate, and the slot between the snap-fit block and the snap-fit plate will be engaged with the end rod.
[0012] As a preferred technical solution of the present invention, a stud is fixedly provided at the top of the main frame, the stud movably passing through the cross plate, and at least two nuts are screwed on the stud, the two nuts being located above and below the cross plate respectively. A spring is also sleeved on the stud, the two ends of the spring abutting against the bottom end face of the nut and the top end face of the cross plate respectively, wherein the spring is always in a rebound state and pushes the locking block toward the bottom of the main frame, thereby ensuring the locking block limits the end rod.
[0013] As a preferred technical solution of the present invention, the two ends of the side rod are through shafts, and the shafts at the two ends of the side rod are respectively fixed to the side of the end rod and the connecting plate.
[0014] As a preferred technical solution of the present invention, the first end limiting plate and the second end limiting plate have a vertical part and a horizontal part, wherein the first limiting groove and the second limiting groove are respectively opened in the vertical part of the first end limiting plate and the second end limiting plate, and the horizontal part of the first end limiting plate and the second end limiting plate is in contact with the top surface of the main frame, thereby realizing the limiting of the entire mounting frame.
[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the existing integrated tooling is replaced with a modular component that allows for quick disassembly and assembly. This tooling can be operated according to different hook sizes, enabling quick disassembly and assembly. In actual production, when faced with the assembly and welding requirements of different hook models, workers can quickly complete the disassembly and assembly of the tooling and hooks without complicated operations, greatly shortening the downtime caused by changing hook models. At the same time, during the welding process, the disassembly and assembly mechanism can ensure that the hooks are stably installed and will not loosen or shift due to size differences or welding vibrations, thereby meeting the welding requirements of hooks of different sizes, effectively improving the versatility and flexibility of the tooling, and improving the overall efficiency of garbage truck hook welding production. Attached Figure Description
[0016] Figure 1 A schematic diagram of the overall structure of a series of positioning devices for welding production of compressed garbage trucks; Figure 2 for Figure 1 A top view diagram showing the state after the mounting fixture has been removed; Figure 3 This is a structural diagram of the disassembly and assembly mechanism; Figure 4 for Figure 1 An enlarged view of the location of region A in the middle; Figure 5 This is a schematic diagram of the snap-fit block structure; Figure 6 Cross-sectional view of the connecting plate Figure 7This is a schematic diagram showing the connection between the end limiting plate 2 and the lever; Figure 8 A schematic diagram showing the position of the disassembly and assembly mechanism of a series of positioning devices for welding production of compressed garbage trucks in the initial installation state.
[0017] In the picture: 100. Main frame; 101. Fixture; 102. Snap-fit block; 102a. Pull column; 102b. Horizontal plate; 102c. Limit head; 102d. Snap-fit plate; 103. Stud; 104. Spring; 105. Connecting plate; 105a. Insertion hole; 106. Side rod; 107. Nut; 200, Mounting frame; 200a, Placement slot; 300. Install the clamps; 401, connecting rod; 401a, vertical plate; 402. Pull rod; 403, lever; 403a, protruding post; 404, end rod; 501. End limiting plate one; 501a. Limiting groove one; 502, Side limiting plate; 502a, Inclined groove; 503, End limiting plate two; 503a, Limiting groove two; 503b, Vertical groove. Detailed Implementation
[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] Please see Figures 1 to 8 The present invention provides a technical solution: a positioning device for welding production of compressed garbage trucks, the positioning device including a main frame 100, a mounting frame 200, a mounting fixture 300, and a disassembly and assembly mechanism; The top of the main frame 100 has a slot for placing the mounting frame 200; The assembly and disassembly mechanism includes limit components and snap-fit parts; The limiting assembly consists of a connector and a limiting component; The limiting components are provided in multiple locations and are distributed on both sides and the top of the slot of the main frame 100; the connecting component connects all the limiting components and drives the limiting components to limit or separate the mounting frame 200 when the connecting component moves laterally back and forth. The snap-fit component is located on one side of the top of the main frame 100. When the snap-fit component is inserted downward into the connector, it drives the limiting component to lock and limit the mounting frame 200. When the snap-fit component is pulled upward, it drives the connector to separate the limiting component from the mounting frame 200. The surface of the mounting frame 200 is provided with a placement slot 200a for accommodating the mounting fixture 300. Both the inner wall of the mounting fixture 300 and the inner wall of the placement slot 200a are provided with screw holes, which can be used to assemble and fix the two together with bolts. In later use, the mounting fixture 300 can be replaced when it wears out. Since the mounting fixture 300 in this position has a long wear cycle and low replacement frequency, bolts are used for fixation.
[0020] In this embodiment, refer to Figure 1 , Figure 2 , Figure 3 The connecting components include a connecting rod 401, a pull rod 402, a lever 403, and an end rod 404; The connecting rods 401 are symmetrically arranged on both sides of the bottom of the main frame 100, and the end of the connecting rod 401 in the direction of the snap-fit extends vertically upward. Multiple pull rods 402 are provided, and their bottom ends are rotatably mounted on the outside of the connecting rod 401 via a shaft. The pull rod 402 is connected to some of the limiting components. The lever 403 is located at the other end of the connecting rod 401, and the bottom end of the lever 403 is also rotatably connected to the connecting rod 401 via a shaft. The top of the lever 403 is fixed with an external protrusion 403a, which is connected to a portion of the limiting member. The end rod 404 is integrally formed on the top of the vertically extending end of the connecting rod 401, and one end of the end rod 404 connects the connecting rods 401 on both sides of the main frame 100 into one piece. The snap-fit is inserted between the end rod 404 and the end face of the main frame 100, and the other end of the end rod 404 is connected to a portion of the limiting member.
[0021] In this embodiment, refer to Figure 3 The other end of the connecting rod 401 is also fixed with a vertical plate 401a. The bottom of the lever 403 is rotatably connected to the vertical plate 401a through a shaft, so as to avoid the bottom of the lever 403 abutting against the fixed seat 101 and causing movement obstruction when the lever 403 rotates. The middle part of the lever 403 is through a pin fixed on the main frame 100. The lever 403 rotates around the axis of the pin, which is not shown in the figure.
[0022] In this embodiment, refer to Figure 1 , Figure 2 , Figure 3 , Figure 8 The limiting components include end limiting plate 1 501, side limiting plate 502, and end limiting plate 2 503; The end limiting plate 501 is fixedly connected to the other end of the end rod 404, and the end limiting plate 501 moves in the same direction as the end rod 404. Multiple side limiting plates 502 are provided, and each side limiting plate 502 is rotatably connected to the top of a single pull rod 402. The side limiting plate 502 moves vertically up and down following the swing of the pull rod 402. The second end limiting plate 503 is connected to the outer protruding post 403a. The second end limiting plate 503 moves horizontally under the swing of the lever 403. The direction of movement of the second end limiting plate 503 is opposite to the direction of movement of the first end limiting plate 501, so as to realize the relative movement of the first end limiting plate 501 and the second end limiting plate 503, thereby achieving the purpose of clamping the mounting frame 200.
[0023] In this embodiment, refer to Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 8 The end limiting plate 501 has at least two horizontal limiting grooves 501a on its surface; The side limiting plate 502 is provided with at least two inclined grooves 502a, which are inclined toward the direction of the snap-fit member; The surface of the end limiting plate 503 is provided with at least two horizontal limiting grooves 503a and a vertical groove 503b. The vertical groove 503b is penetrated by the protruding post 403a at the top of the lever 403; bolts are inserted into the interior of the first limiting groove 501a, the inclined groove 502a and the second limiting groove 503a; the side of the main frame 100 is provided with screw holes for the bolts to be screwed in; by setting the bolts, the first end limiting plate 501 and the second end limiting plate 503 can be moved in the horizontal direction, and the side limiting plate 502 can be moved in the inclined direction along its own inclined groove 502a.
[0024] In this embodiment, refer to Figure 4 , Figure 5 , Figure 6 The snap-fit component includes a snap-fit block 102, a connecting plate 105, and a side rod 106; The snap-fit block 102 is vertical, and a snap-fit plate 102d is formed on its outer surface. A snap-fit groove with a bottom opening is formed between the snap-fit plate 102d and the snap-fit block 102. The snap-fit groove formed by the snap-fit plate 102d and the snap-fit block 102 is fastened to the end rod 404, thereby limiting the end rod 404. When the end rod 404 is limited, the position of the entire limiting assembly is also limited and there will be no change in position. The top of the snap-fit block 102 is horizontally bent and a horizontal plate 102b is formed. The horizontal plate 102b is placed on the top of the main frame 100. A pull post 102a is also fixed at the bottom end of the snap-fit block 102, and a limiting head 102c is formed at the bottom end of the pull post 102a. The connecting plate 105 is located below the snap-fit block 102 and is connected to the limit head 102c; The two ends of the side rod 106 are rotatably connected to the side of the connecting plate 105 and the side of the end rod 404, respectively.
[0025] In this embodiment, refer to Figure 5 , Figure 6 The top of the connecting plate 105 has a downward-facing insertion hole 105a. The limiting head 102c slides up and down within the insertion hole 105a. In the initial installation, two separate plates can be spliced or welded together to form the connecting plate 105. Before assembling the connecting plate 105, the pull post 102a and the limiting head 102c are placed in the insertion hole 105a. The top opening of the insertion hole 105a is recessed and is locked in place by the limiting head 102c. Near the top opening of the insertion hole 105a, there is an inwardly raised annular protrusion with a triangular cross-section. When the pull post 102a is lifted synchronously with the locking block 102, the limiting head 102c will... When the insertion hole 105a moves upward until the limiting head 102c contacts the bottom surface of the annular protrusion, the end rod 404 separates from the slot of the snap-fit plate 102d and the snap-fit block 102. When the snap-fit block 102 is pulled up, the limiting head 102c will squeeze the annular protrusion. Affected by the force required to pull the limiting component, the limiting head 102c will squeeze the annular protrusion and move to the top of the annular protrusion. When the snap-fit block 102 is pressed down, the limiting head 102c will first squeeze the annular protrusion to lower the connecting plate 105. Then, the end rod 404 will return to the initial position through the connecting plate 105. Finally, the slot between the snap-fit block 102 and the snap-fit plate 102d will be fastened to the end rod 404.
[0026] In this embodiment, refer to Figure 4A stud 103 is fixedly provided at the top of the main frame 100. The stud 103 moves through the horizontal plate 102b. At least two nuts 107 are screwed on the stud 103. The two nuts 107 are located above and below the horizontal plate 102b, respectively. A spring 104 is also sleeved on the stud 103. The two ends of the spring 104 abut against the bottom end face of the nut 107 and the top end face of the horizontal plate 102b, respectively. The spring 104 is always in a rebound state and pushes the locking block 102 toward the bottom of the main frame 100, thereby ensuring that the locking block 102 limits the end rod 404.
[0027] In this embodiment, shafts pass through both ends of the side rod 106, and the shafts at both ends of the side rod 106 are respectively fixed to the side of the end rod 404 and the connecting plate 105.
[0028] In this embodiment, the first end limiting plate 501 and the second end limiting plate 503 have vertical and horizontal portions. The first limiting groove 501a and the second limiting groove 503a are respectively opened in the vertical portions of the first end limiting plate 501 and the second end limiting plate 503, while the horizontal portions of the first end limiting plate 501 and the second end limiting plate 503 are in contact with the top surface of the main frame 100, thereby achieving the overall limiting of the mounting frame 200.
[0029] The following explains the assembly and disassembly principles of the positioning device: First, install the appropriate mounting clamp 300 into the placement slot 200a using bolts. Then, pull the horizontal plate 102b upwards. At this time, the horizontal plate 102b compresses the spring 104, and the spring 104 generates a rebound force. Simultaneously, the limiting head 102c moves upwards within the insertion hole 105a. When the snap-fit plate 102d separates from the end rod 404, the limiting head 102c moves to the opening of the insertion hole 105a and is limited. Thus, the connecting plate 105 is lifted by the limiting head 102c. When the connecting plate 105 is lifted, it will drive the bottom end of the side rod 106 to move upwards. At this time, the top end of the side rod 106 will... The end rod 404 moves downward in the direction away from the end rod 404, thus moving the end rod 404 towards the outside of the locking block 102. When the end rod 404 moves, it will move the end limiting plate 501 outward from the slot position of the main frame 100 without obstructing the slot position. Simultaneously, the end rod 404 drives the connecting rod 401 to move. When the connecting rod 401 moves, it will cause the bottom of the pull rod 402 to tilt towards the locking block 102, and at the same time, it will cause the top of the pull rod 402 to tilt downward. At this time, the pull rod 402 will drive the side limiting plate 502 to move downward, and the downward moving side limiting plate 502 will move along... The inclined groove 502a moves downwards, ensuring that the downward path is the same as the downward path of the inclined rod 402, thus avoiding movement obstruction. The connecting rod 401 also drives the lever 403 to rotate via the vertical plate 401a. The lever 403 rotates around the pin shaft. At this time, the protruding post 403a at the top of the lever 403 rotates away from the locking block 102 and moves within the vertical groove 503b. Simultaneously, the end limiting plate 503 moves away from the locking block 102, allowing the end limiting plate 503 to move outwards from the position of the slot in the main frame 100. At this time, the end limiting plate 503 and the end limiting plate 502a... The position plate 501 moves in opposite directions to fully open the slot. Then, the mounting frame 200 with the mounting clamp 300 is placed in the slot of the main frame 100. After placement, the horizontal plate 102b is released. Under the rebound of the spring 104, the snap-fit block 102 returns to its original position. At this time, the connecting plate 105 descends synchronously with the snap-fit block 102 and drives the side rod 106 to return the end rod 404 to its original position. At the same time, the snap-fit plate 102d and the snap-fit block 102 are engaged in the snap-fit groove on the end rod 404 to achieve installation. During disassembly, the snap-fit plate 102d can be pulled to disassemble.
[0030] Although embodiments of the invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A series positioning device for welding production of compressed garbage trucks, characterized in that: The positioning device includes a main frame (100), a mounting frame (200), a mounting clamp (300), and a disassembly and assembly mechanism; The top of the main frame (100) is provided with a slot for placing the mounting frame (200); The disassembly and assembly mechanism includes a limiting component and a snap-fit component; The limiting component consists of a connector and a limiting component; The limiting member is provided in multiple parts and is distributed on both sides and the top of the slot of the main frame (100); the connecting member connects all the limiting members and drives the limiting members to limit or separate the mounting frame (200) when the connecting member moves laterally back and forth. The snap-fit component is located on one side of the top of the main frame (100). When the snap-fit component is inserted downward into the connector, it drives the limiting component to lock and limit the mounting frame (200). When the snap-fit component is pulled upward, it drives the connector to separate the limiting component from the mounting frame (200). The surface of the mounting frame (200) is provided with a placement slot (200a) for accommodating the mounting fixture (300).
2. The positioning device for welding production of compressed garbage trucks according to claim 1, characterized in that: The connector includes a connecting rod (401), a pull rod (402), a lever (403), and an end rod (404). The connecting rod (401) is symmetrically arranged on both sides of the bottom of the main frame (100), and the end of the connecting rod (401) in the direction of the snap-fit extends vertically upward; The pull rod (402) is provided in multiple parts, and its bottom end is rotatably disposed on the outside of the connecting rod (401) via a shaft. The pull rod (402) is connected to some of the limiting members. The lever (403) is located at the other end of the connecting rod (401), and the bottom end of the lever (403) is also rotatably connected to the connecting rod (401) via a shaft. The top of the lever (403) is fixed with an outward protrusion (403a), which is connected to a portion of the limiting member. The end rod (404) is integrally formed on the top of the end of the connecting rod (401) that extends vertically upward. One end of the end rod (404) connects the connecting rods (401) on both sides of the main frame (100) into one piece. The snap-fit is inserted between the end rod (404) and the end face of the main frame (100). The other end of the end rod (404) is connected to a portion of the limiting member.
3. The positioning device for welding production of compressed garbage trucks according to claim 2, characterized in that: The other end of the connecting rod (401) is also fixed with a vertical plate (401a). The bottom of the lever (403) is rotatably connected to the vertical plate (401a) through a shaft, and a pin fixed on the main frame (100) passes through the middle of the lever (403). The lever (403) rotates around the axis of the pin.
4. A series positioning device for welding production of compressed garbage trucks according to claim 2, characterized in that: The limiting components include end limiting plate one (501), side limiting plate (502), and end limiting plate two (503). The end limiting plate (501) is fixedly connected to the other end of the end rod (404), and the end limiting plate (501) moves in the same direction as the end rod (404); Multiple side limiting plates (502) are provided, and each side limiting plate (502) is rotatably connected to the top of a single pull rod (402), and the side limiting plate (502) moves vertically up and down following the swing of the pull rod (402); The second end limiting plate (503) is connected to the protruding post (403a). The second end limiting plate (503) moves horizontally under the swing of the lever (403). The direction of movement of the second end limiting plate (503) is opposite to the direction of movement of the first end limiting plate (501).
5. A series positioning device for welding production of compressed garbage trucks according to claim 4, characterized in that: At least two horizontal limiting grooves (501a) are provided on the surface of the end limiting plate (501). The side limiting plate (502) is provided with at least two inclined grooves (502a), which are inclined toward the direction of the snap-fit component; The surface of the end limiting plate 2 (503) is provided with at least two horizontal limiting grooves 2 (503a) and a vertical groove (503b). The vertical groove (503b) is penetrated by the protruding post (403a) at the top of the lever (403); bolts are inserted into the interior of the first limiting groove (501a), the inclined groove (502a) and the second limiting groove (503a); and the side of the main frame (100) is provided with screw holes for the bolts to be screwed in.
6. The positioning device for welding production of compressed garbage trucks according to claim 4, characterized in that: The snap-fit component includes a snap-fit block (102), a connecting plate (105), and a side rod (106); The snap-fit block (102) is vertical, and a snap-fit plate (102d) is formed on its outer surface. A snap-fit groove with a bottom opening is formed between the snap-fit plate (102d) and the snap-fit block (102), and the snap-fit groove formed by the snap-fit plate (102d) and the snap-fit block (102) is fastened to the end rod (404). The top of the snap-fit block (102) is horizontally bent and a horizontal plate (102b) is formed. The horizontal plate (102b) is placed on the top of the main frame (100). A pull post (102a) is also fixed at the bottom end of the snap-fit block (102), and a limit head (102c) is formed at the bottom end of the pull post (102a). The connecting plate (105) is disposed below the snap-fit block (102) and is connected to the limiting head (102c); The two ends of the side rod (106) are rotatably connected to the side of the connecting plate (105) and the side of the end rod (404), respectively.
7. A series positioning device for welding production of compressed garbage trucks according to claim 6, characterized in that: The top of the connecting plate (105) has a downward-facing insertion hole (105a). The limiting head (102c) slides up and down inside the insertion hole (105a). The top opening of the insertion hole (105a) is inwardly recessed and is limited and locked by the limiting head (102c). Near the top opening of the insertion hole (105a), an inwardly raised annular protrusion is also formed. The longitudinal section of the annular protrusion is triangular.
8. A series positioning device for welding production of compressed garbage trucks according to claim 6, characterized in that: A stud (103) is fixedly provided at the top of the main frame (100), and the stud (103) moves through the cross plate (102b). At least two nuts (107) are screwed on the stud (103), and the two nuts (107) are respectively located above and below the cross plate (102b). A spring (104) is also sleeved on the stud (103), and the two ends of the spring (104) abut against the bottom end face of the nut (107) and the top end face of the cross plate (102b) respectively.
9. A series positioning device for welding production of compressed garbage trucks according to claim 6, characterized in that: The two ends of the side rod (106) are connected by shafts, and the shafts at both ends of the side rod (106) are respectively fixed to the side of the end rod (404) and the connecting plate (105).
10. A series positioning device for welding production of compressed garbage trucks according to claim 4, characterized in that: The end limiting plate one (501) and the end limiting plate two (503) have a vertical part and a horizontal part, wherein the limiting groove one (501a) and the limiting groove two (503a) are respectively opened in the vertical part of the end limiting plate one (501) and the end limiting plate two (503), and the horizontal part of the end limiting plate one (501) and the end limiting plate two (503) is in contact with the top surface of the main frame (100).