Assembly welding tool for mine truck frame

Abstract

The utility model discloses a mine truck frame assembling and welding tool which is characterized in that a supporting seat and a platform datum plane are firmly spot-welded, two sides of the supporting seat and the platform datum plane are symmetrically arranged in the width direction, a gantry beam positioning seat and a gantry frame are compacted by a puller screw, a longitudinal beam puller seat and a longitudinal beam positioning support are arranged front and back, two sides of the longitudinal beam positioning support are symmetrically arranged in the width direction, and the puller screw is adopted for compacting. The traction cross beam positioning seat and the traction cross beam supporting seat are matched with the traction shaft, and the rear cross beam supporting seat and the carriage rotating shaft positioning seat are matched with the rear cross beam shaft, so that a lifting effect is achieved, and the precision of a left beam and a right beam is conveniently controlled. Accurate positioning and reliable clamping of a weldment are achieved, the weldment can be conveniently assembled and welded, the precision size and installation size requirements of a mechanism are guaranteed, the component is adopted for assembling and welding during small-batch proofing trial-manufacturing, manufacturing is convenient, cost can be effectively saved, and meanwhile application and popularization are facilitated.

Description

Technical Field

[0001] The utility model relates to a mining truck frame, in particular to a mining truck frame assembly welding tool. Background Art

[0002] Mining truck frames are critical components that withstand various forces and moments, requiring precise and reliable manufacturing. Currently, complete components are welded together using tooling, which requires the assistance of numerous hydraulic components. While hydraulic components are suitable for large-scale prototype production, specialized hydraulic tooling is expensive for small-scale trial production, hindering cost savings. Utility Model Content

[0003] In order to solve the defects of the above-mentioned prior art, the utility model provides a mining truck frame welding fixture. The utility model realizes accurate positioning and reliable clamping of weldments, facilitates assembly and welding of weldments, and ensures the precision dimensions and installation dimension requirements of the mechanism. The component welding fixture is used in small-batch proofing and trial production, which is easy to manufacture, can effectively save costs, and is conducive to promotion and use.

[0004] To achieve the above technical objectives, the present invention adopts the following technical solutions: a mining truck frame welding fixture, comprising a bottom plate, on which are provided a longitudinal beam support seat, a gantry beam positioning seat, a longitudinal beam tightening seat, a longitudinal beam positioning support seat, a traction beam positioning seat, a traction beam support seat, and a carriage shaft positioning seat;

[0005] The two longitudinal beam support seats are symmetrically arranged at the head of the base plate for supporting the longitudinal beam; the two gantry beam positioning seats are symmetrically arranged on the side of the base plate for positioning the gantry beam, and the two gantry beam positioning seats are located behind the two longitudinal beam support seats; the four longitudinal beam tightening seats are symmetrically arranged on the side of the base plate for supporting the longitudinal beam, and the four longitudinal beam tightening seats are located behind the two gantry beam positioning seats; the four longitudinal beam positioning supports are symmetrically arranged in the middle of the base plate, and the two longitudinal beam positioning supports are symmetrically arranged in the middle of the base plate. The seat is located between the two longitudinal beam tightening seats at the front, and the two longitudinal beam positioning supports are located between the two longitudinal beam tightening seats at the rear; the two traction beam positioning seats are symmetrically arranged in the middle of the base plate for positioning the traction beam, and the two traction beam positioning seats are located between the four longitudinal beam positioning supports; one traction beam support seat is arranged between the two traction beam positioning seats for supporting the traction beam; one car shaft positioning seat is arranged at the rear of the base plate for positioning the car shaft.

[0006] Furthermore, the longitudinal beam support seat includes a longitudinal beam support top plate, a longitudinal beam support rib plate, and a longitudinal beam support bottom plate. The longitudinal beam support top plate is fixed to the top of the longitudinal beam support rib plate, and the longitudinal beam support rib plate is fixed to the upper surface of the longitudinal beam support bottom plate.

[0007] Further, the portal beam positioning seat comprises a portal beam positioning bottom plate, a portal beam positioning support, a portal beam positioning rib plate and a portal beam positioning plate, the portal beam positioning support is fixed on the portal beam positioning bottom plate, the portal beam positioning rib plate is fixed in the middle of the portal beam positioning support, and the portal beam positioning plate is fixed on the top of the portal beam positioning support.

[0008] Further, the longitudinal beam positioning seat comprises a longitudinal beam positioning plate, a longitudinal beam positioning nut seat, a longitudinal beam positioning rib plate and a longitudinal beam positioning bottom plate, the longitudinal beam positioning rib plate is fixed on the longitudinal beam positioning bottom plate, the longitudinal beam positioning plate is fixed on the longitudinal beam positioning rib plate, and the longitudinal beam positioning nut seat is fixed on the longitudinal beam positioning plate.

[0009] Further, the longitudinal beam positioning support comprises a longitudinal beam positioning bottom plate, a longitudinal beam positioning fixed plate, a longitudinal beam positioning first support, a longitudinal beam positioning second support, a longitudinal beam positioning pin, two longitudinal beam positioning connecting rods and a longitudinal beam positioning movable positioning plate, the longitudinal beam positioning fixed plate, the longitudinal beam positioning first support and the longitudinal beam positioning second support are all fixed on the longitudinal beam positioning bottom plate, the two longitudinal beam positioning connecting rods are fixed on the longitudinal beam positioning first support and the longitudinal beam positioning second support through the longitudinal beam positioning pin, and the longitudinal beam positioning movable positioning plate is fixed on the outer end of the longitudinal beam positioning second support.

[0010] Further, the traction cross beam positioning seat comprises a traction cross beam positioning bottom plate, a traction cross beam positioning vertical plate and a traction cross beam positioning rib plate, the traction cross beam positioning vertical plate and the traction cross beam positioning rib plate are both fixed on the traction cross beam positioning bottom plate, and the traction cross beam positioning vertical plate is fixedly connected with the traction cross beam positioning rib plate.

[0011] Further, the traction cross beam supporting seat comprises a traction cross beam supporting bottom plate, a traction cross beam supporting vertical plate and a traction cross beam supporting round bracket, the traction cross beam supporting vertical plate is fixed on the traction cross beam supporting bottom plate, the traction cross beam supporting vertical plate is provided with a traction cross beam supporting groove, the traction cross beam supporting round bracket is fixed on the traction cross beam supporting vertical plate, and the traction cross beam supporting round bracket is provided with a groove corresponding to the traction cross beam supporting groove.

[0012] Further, the carriage rotating shaft positioning seat comprises a carriage rotating shaft positioning bottom plate, a carriage rotating shaft positioning high vertical plate, a carriage rotating shaft positioning low vertical plate, a carriage rotating shaft positioning high pin hole and a carriage rotating shaft positioning low pin hole, the carriage rotating shaft positioning high vertical plate and the carriage rotating shaft positioning low vertical plate are both fixed on the carriage rotating shaft positioning bottom plate, the carriage rotating shaft positioning high pin hole is located on the carriage rotating shaft positioning high vertical plate, and the carriage rotating shaft positioning low pin hole is located on the carriage rotating shaft positioning low vertical plate.

[0013] In conclusion, the utility model has the following technical effects:

[0014] The utility model provides a simple frame welding tool, which can reduce the cost of using hydraulic tooling when the batch is small;

[0015] The utility model has a component tightening device with a simple structure and stable function, which can effectively reduce welding deformation, meet the welding size and improve work efficiency.

[0016] The utility model spot welds the support seat firmly to the platform reference plane, and arranges them symmetrically in the width direction on both sides. The gantry beam positioning seat and the gantry frame are compacted with tightening screws. The longitudinal beam tightening seat and the longitudinal beam positioning support are arranged front to back, and are symmetrical in the width direction on both sides, and are compacted with tightening screws. Attention is paid to the distance between the left and right beams to facilitate lifting the workpiece after the assembly welding is completed. The traction beam positioning seat cooperates with the traction beam support seat and the traction shaft, and the rear beam support seat cooperates with the carriage rotating shaft positioning seat and the rear beam shaft, which has a lifting effect and is convenient for controlling the accuracy of the left and right beams. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a mining truck frame welding tool;

[0018] Figure 2 It is a schematic diagram of the longitudinal beam support seat;

[0019] Figure 3 This is a schematic diagram of the gantry beam positioning seat;

[0020] Figure 4 This is a schematic diagram of the longitudinal beam tightening seat;

[0021] Figure 5 It is a schematic diagram of the longitudinal beam positioning support;

[0022] Figure 6 This is a schematic diagram of the traction beam positioning seat;

[0023] Figure 7 It is a schematic diagram of the traction beam support seat;

[0024] Figure 8 This is a schematic diagram of the carriage shaft positioning seat. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below with reference to the accompanying drawings.

[0026] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships 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, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0028] Furthermore, 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0029] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0030] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0031] Example:

[0032] Figure 1 The figure is a schematic diagram of a welding tool for a mining truck frame, including a bottom plate, on which are provided a longitudinal beam support seat 1, a gantry beam positioning seat 2, a longitudinal beam tightening seat 3, a longitudinal beam positioning support 4, a traction beam positioning seat 5, a traction beam support seat 6, and a carriage shaft positioning seat 8;

[0033] 2 longitudinal beam support seats 1 are symmetrically arranged at the head of the bottom plate for supporting longitudinal beams; 2 portal beam positioning seats 2 are symmetrically arranged at the side edges of the bottom plate for positioning portal beams, and the 2 portal beam positioning seats 2 are located behind the 2 longitudinal beam support seats 1; 4 longitudinal beam jacking seats 3 are symmetrically arranged at the side edges of the bottom plate for supporting longitudinal beams, and the 4 longitudinal beam jacking seats 3 are located behind the 2 portal beam positioning seats 2; 4 longitudinal beam positioning supports 4 are symmetrically arranged at the middle part of the bottom plate, 2 longitudinal beam positioning supports 4 are located between the 2 longitudinal beam jacking seats 3 at the front part, and 2 longitudinal beam positioning supports 4 are located between the 2 longitudinal beam jacking seats 3 at the rear part; 2 traction cross beams positioning seats 5 are symmetrically arranged at the middle part of the bottom plate for positioning traction cross beams, and the 2 traction cross beams positioning seats 5 are located between the 4 longitudinal beam positioning supports 4; 1 traction cross beam support seat 6 is arranged between the 2 traction cross beams positioning seats 5 for supporting the traction cross beam; 1 carriage rotating shaft positioning seat 8 is arranged at the rear part of the bottom plate for positioning the carriage rotating shaft. It also includes a rear cross beam support seat 7, and 1 rear cross beam support seat is arranged at the rear part of the bottom plate.

[0034] The utility model discloses firmly spot weld the support seat with platform datum plane, two sides width direction symmetrical arrangement, adopts the jacking screw compaction of portal beam positioning seat and portal frame, longitudinal beam jacking seat and longitudinal beam positioning support are arranged before and after, two sides width direction symmetrical arrangement, and adopt the jacking screw compaction, pay attention to the distance between left and right beams, and it is convenient to hoist and take workpiece after assembly welding is completed, traction cross beam positioning seat and traction cross beam support seat cooperate with traction axle, rear cross beam support seat and carriage rotating shaft positioning seat cooperate with rear cross beam axle, have the action of lifting, and it is convenient to control the precision of left and right beams.

[0035] Figure 2 It is longitudinal beam support seat schematic diagram, the longitudinal beam support seat 1 includes longitudinal beam support top plate 11, longitudinal beam support muscle plate 12, longitudinal beam support bottom plate 13, the longitudinal beam support top plate 11 is fixed at the longitudinal beam support muscle plate 12 top, the longitudinal beam support muscle plate 12 is fixed on the longitudinal beam support bottom plate 13 upper surface.

[0036] The support seat is firmly spot welded with the platform datum plane, and is symmetrically arranged in the width direction on both sides.

[0037] Figure 3 It is portal beam positioning seat schematic diagram, the portal beam positioning seat 2 includes portal beam positioning bottom plate 21, portal beam positioning support 22, portal beam positioning muscle plate 23, portal beam positioning plate 24, the portal beam positioning support 22 is fixed on the portal beam positioning bottom plate 21, the portal beam positioning muscle plate 23 is fixed in the portal beam positioning support 22 middle part, the portal beam positioning plate 24 is fixed on the portal beam positioning support 22 top.

[0038] The gantry beam positioning seat and the gantry frame are compacted by tightening screws instead of hydraulic rods, which is simple, convenient and low-cost.

[0039] Figure 4 It is a schematic diagram of the longitudinal beam tightening seat, and the longitudinal beam tightening seat 3 includes a longitudinal beam tightening plate 31, a longitudinal beam tightening nut seat 32, a longitudinal beam tightening rib plate 34, and a longitudinal beam tightening bottom plate 33; the longitudinal beam tightening rib plate 34 is fixed on the longitudinal beam tightening bottom plate 33, the longitudinal beam tightening plate 31 is fixed on the longitudinal beam tightening rib plate 34, and the longitudinal beam tightening nut seat 32 is fixed on the longitudinal beam tightening plate 31.

[0040] Figure 5 It is a schematic diagram of the longitudinal beam positioning support, the longitudinal beam positioning support 4 includes a longitudinal beam positioning support base plate 41, a longitudinal beam positioning fixing plate 42, a longitudinal beam positioning first bracket 43, a longitudinal beam positioning second bracket 44, a longitudinal beam positioning pin 45, two longitudinal beam positioning connecting rods 46, and a longitudinal beam positioning movable positioning plate 47; the longitudinal beam positioning fixing plate 42, the longitudinal beam positioning first bracket 43, and the longitudinal beam positioning second bracket 44 are all fixed on the longitudinal beam positioning support base plate 41, the two longitudinal beam positioning connecting rods 46 are fixed on the longitudinal beam positioning first bracket 43 and the longitudinal beam positioning second bracket 44 by the longitudinal beam positioning pin 45, and the longitudinal beam positioning movable positioning plate 47 is fixed to the outer end of the longitudinal beam positioning second bracket 44.

[0041] The longitudinal beam tightening seat and longitudinal beam positioning support are arranged front to back, symmetrically in the width direction on both sides, and compacted with tightening screws. Pay attention to the distance between the left and right beams to facilitate lifting the workpiece after welding is completed.

[0042] Figure 6 It is a schematic diagram of a traction beam positioning seat, wherein the traction beam positioning seat 5 includes a traction beam positioning base plate 51, a traction beam positioning vertical plate 52, and a traction beam positioning rib plate 53; the traction beam positioning vertical plate 52 and the traction beam positioning rib plate 53 are both fixed on the traction beam positioning base plate 51, and the traction beam positioning vertical plate 52 is fixedly connected to the traction beam positioning rib plate 53.

[0043] Figure 7 It is a schematic diagram of a traction beam support seat, wherein the traction beam support seat 6 includes a traction beam support base plate 61, a traction beam support vertical plate 62, and a traction beam support circular ledge 64. The traction beam support vertical plate 62 is fixed on the traction beam support base plate 61, and the traction beam support vertical plate 62 is provided with a traction beam support groove 63. The traction beam support circular ledge 64 is fixed on the traction beam support vertical plate 62, and the traction beam support circular ledge 64 is provided with a groove, and the groove corresponds to the traction beam support groove 63.

[0044] The traction beam positioning seat and the traction beam supporting seat cooperate with the traction shaft to support and position the traction beam, which is convenient, fast and low-cost.

[0045] A rear crossbeam support seat is arranged at the rear of the bottom plate and cooperates with the carriage shaft positioning seat.

[0046] Figure 8 It is a schematic diagram of the carriage shaft positioning seat, the carriage shaft positioning seat 8 includes a carriage shaft positioning base plate 83, a carriage shaft positioning high vertical plate 81, a carriage shaft positioning low vertical plate 82, a carriage shaft positioning high pin hole 84, and a carriage shaft positioning low pin hole 85; the carriage shaft positioning high vertical plate 81 and the carriage shaft positioning low vertical plate 82 are both fixed on the carriage shaft positioning base plate 83, the carriage shaft positioning high pin hole 84 is located on the carriage shaft positioning high vertical plate 81, and the carriage shaft positioning low pin hole 85 is located on the carriage shaft positioning low vertical plate 82.

[0047] The rear crossbeam support seat, the carriage shaft positioning seat and the rear crossbeam shaft cooperate with each other to have a lifting effect, making it convenient to control the accuracy of the left and right beams.

[0048] The bottom of the longitudinal beam support seat is spot welded firmly to the platform reference plane, and the top of the longitudinal beam support seat supports the bottom of the left and right longitudinal beams of the frame. The gantry beam positioning seat clamps the outer side of the gantry beam through the tightening screw. The longitudinal beam tightening seat and the longitudinal beam positioning support clamp the middle section of the longitudinal beam in four directions, inside, outside, front and back, through the tightening screw. The traction beam support seat and the traction beam positioning seat use tightening screws to clamp and position the lifting beam. The rear beam support seat realizes front and rear limit through the top arc, and the car shaft positioning seat positions and clamps the right shaft of the car. This tooling is simple to use, replaces hydraulic parts, and has low cost.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A mining truck frame welding tool, characterized by: It comprises a bottom plate, on which a longitudinal beam support seat (1), a gantry beam positioning seat (2), a longitudinal beam tightening seat (3), a longitudinal beam positioning support seat (4), a traction crossbeam positioning seat (5), a traction crossbeam support seat (6), and a carriage shaft positioning seat (8) are arranged; The two longitudinal beam support seats (1) are symmetrically arranged at the head of the base plate for supporting the longitudinal beam; the two gantry beam positioning seats (2) are symmetrically arranged at the side of the base plate for positioning the gantry beam, and the two gantry beam positioning seats (2) are located behind the two longitudinal beam support seats (1); the four longitudinal beam tightening seats (3) are symmetrically arranged at the side of the base plate for supporting the longitudinal beam, and the four longitudinal beam tightening seats (3) are located behind the two gantry beam positioning seats (2); the four longitudinal beam positioning supports (4) are symmetrically arranged at the middle of the base plate, and the two longitudinal beam positioning supports (4 ) is located between the two longitudinal beam tightening seats (3) at the front, and the two longitudinal beam positioning supports (4) are located between the two longitudinal beam tightening seats (3) at the rear; the two traction beam positioning seats (5) are symmetrically arranged in the middle of the base plate for positioning the traction beam, and the two traction beam positioning seats (5) are located between the four longitudinal beam positioning supports (4); one traction beam support seat (6) is arranged between the two traction beam positioning seats (5) for supporting the traction beam; and one carriage shaft positioning seat (8) is arranged at the rear of the base plate for positioning the carriage shaft.

2. The mining truck frame welding tool according to claim 1, characterized in that: The longitudinal beam support seat (1) comprises a longitudinal beam support top plate (11), a longitudinal beam support rib plate (12), and a longitudinal beam support bottom plate (13); the longitudinal beam support top plate (11) is fixed to the top of the longitudinal beam support rib plate (12), and the longitudinal beam support rib plate (12) is fixed to the upper surface of the longitudinal beam support bottom plate (13).

3. The mining truck frame welding tool according to claim 1, characterized in that: The gantry beam positioning seat (2) comprises a gantry beam positioning base plate (21), a gantry beam positioning bracket (22), a gantry beam positioning rib plate (23), and a gantry beam positioning plate (24); the gantry beam positioning bracket (22) is fixed on the gantry beam positioning base plate (21); the gantry beam positioning rib plate (23) is fixed to the middle of the gantry beam positioning bracket (22); and the gantry beam positioning plate (24) is fixed to the top of the gantry beam positioning bracket (22).

4. The mining truck frame welding tool according to claim 1, characterized in that: The longitudinal beam tightening seat (3) comprises a longitudinal beam tightening plate (31), a longitudinal beam tightening nut seat (32), a longitudinal beam tightening rib plate (34), and a longitudinal beam tightening bottom plate (33); the longitudinal beam tightening rib plate (34) is fixed on the longitudinal beam tightening bottom plate (33), the longitudinal beam tightening plate (31) is fixed on the longitudinal beam tightening rib plate (34), and the longitudinal beam tightening nut seat (32) is fixed on the longitudinal beam tightening plate (31).

5. The mining truck frame welding tool according to claim 1, characterized in that: The longitudinal beam positioning support (4) comprises a longitudinal beam positioning support base plate (41), a longitudinal beam positioning fixing plate (42), a longitudinal beam positioning first bracket (43), a longitudinal beam positioning second bracket (44), a longitudinal beam positioning pin (45), two longitudinal beam positioning connecting rods (46), and a longitudinal beam positioning movable positioning plate (47); the longitudinal beam positioning fixing plate (42), the longitudinal beam positioning first bracket (43), and the longitudinal beam positioning second bracket (44) are all fixed on the longitudinal beam positioning support base plate (41), the two longitudinal beam positioning connecting rods (46) are fixed on the longitudinal beam positioning first bracket (43) and the longitudinal beam positioning second bracket (44) by means of the longitudinal beam positioning pin (45), and the longitudinal beam positioning movable positioning plate (47) is fixed to the outer end of the longitudinal beam positioning second bracket (44).

6. The mining truck frame welding tool according to claim 1, characterized in that: The traction beam positioning seat (5) comprises a traction beam positioning base plate (51), a traction beam positioning vertical plate (52), and a traction beam positioning rib plate (53); the traction beam positioning vertical plate (52) and the traction beam positioning rib plate (53) are both fixed on the traction beam positioning base plate (51), and the traction beam positioning vertical plate (52) is fixedly connected to the traction beam positioning rib plate (53).

7. The mining truck frame welding tool according to claim 1, characterized in that: The traction beam support seat (6) comprises a traction beam support base plate (61), a traction beam support vertical plate (62), and a traction beam support circular ledge (64); the traction beam support vertical plate (62) is fixed on the traction beam support base plate (61); the traction beam support vertical plate (62) is provided with a traction beam support groove (63); the traction beam support circular ledge (64) is fixed on the traction beam support vertical plate (62); the traction beam support circular ledge (64) is provided with a groove, and the groove corresponds to the traction beam support groove (63).

8. The mining truck frame welding tool according to claim 1, characterized in that: The carriage shaft positioning seat (8) comprises a carriage shaft positioning base plate (83), a carriage shaft positioning high vertical plate (81), a carriage shaft positioning low vertical plate (82), a carriage shaft positioning high pin hole (84), and a carriage shaft positioning low pin hole (85); the carriage shaft positioning high vertical plate (81) and the carriage shaft positioning low vertical plate (82) are both fixed on the carriage shaft positioning base plate (83), the carriage shaft positioning high pin hole (84) is located on the carriage shaft positioning high vertical plate (81), and the carriage shaft positioning low pin hole (85) is located on the carriage shaft positioning low vertical plate (82).

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