Supporting and limiting device for traction base of trailer

Abstract

The utility model relates to a supporting and limiting device for a traction base of a trailer, which comprises a bottom plate, a rear wedge block, a centering front wedge block, a second L-shaped pressing block and a first L-shaped pressing block, the rear wedge block, the centering front wedge block, the second L-shaped pressing block and the first L-shaped pressing block are arranged on the bottom plate, the rear wedge block is fixed on the bottom plate, the centering front wedge block is arranged on the bottom plate in a sliding mode and slides along the central axis direction of a workpiece, and the first L-shaped pressing block is fixed on the bottom plate. The rear wedge block and the centering front wedge block are located at the two ends of the central axis of the workpiece and used for positioning the central axis of the workpiece; the bottom plate is provided with hollowed-out holes used for positioning and exposing first machining faces of the bottom face of a workpiece and cushion blocks used for supporting concave parts between the first machining faces, the first L-shaped pressing blocks are located on the two sides of the rear wedge block and used for pressing the workpiece, and the second L-shaped pressing blocks are located on the two sides of the bottom plate and used for pressing the workpiece. Compared with the prior art, the utility model has the advantages that all processing surfaces can be simultaneously exposed, the processing efficiency is improved and the like.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts processing, and in particular to a support and limiting device for a trailer towing base. Background Technology

[0002] The towing device is a crucial factor affecting the safety of large trailers. Optimizing the towing device to reduce weight and size while meeting relevant strength requirements is an important means to improve the economic efficiency of trailers.

[0003] Among them, for such Figures 1 to 3 The traction base shown is a novel design. This traction base requires multiple high-precision machined surfaces, namely the first machined surface 1-1, the second machined surface 1-2, and the third machined surface 1-3. The first machined surface is located at the bottom of the workpiece, specifically the surface of the six first workpiece protrusions. The second machined surface 1-2 is a U-shaped internal surface, and the third machined surface 1-3 is a countersunk hole distributed in a ring opposite to the second machined surface 1-2. Since the multiple surfaces are intersecting, in the prior art, all machined surfaces are usually machined in 4 steps. The main steps are: using a vertical milling machine with a chuck to process the first machined surface 1-1, then using a drilling machine with a general-purpose fixture to drill holes in the first machined surface 1-1, and then using the 6 holes of the first machined surface for positioning to process the remaining machined surfaces.

[0004] This method involves a relatively large number of steps, requiring three clamping operations, which affects efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a support and limiting device for a trailer towing base. The central axis of the workpiece is positioned by a rear wedge and a centering front wedge, which exposes the second machining surface. Combined with the floor opening, the first machining surface can be exposed. Combined with the third machining surface that can be exposed, the workpiece is pressed together with the second L-shaped pressure block and the first L-shaped pressure block. Thus, by combining horizontal limiting with vertical pressing, the workpiece only needs to be clamped once to expose all the surfaces that need to be processed, eliminating the need for repeated clamping and improving efficiency.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A support and limiting device for a trailer towing base, comprising:

[0008] The base plate and the rear wedge block, the centering front wedge block, the second L-shaped pressure block, and the first L-shaped pressure block set on the base plate.

[0009] The rear wedge is fixed to the base plate, and the centering front wedge is slidably disposed on the base plate and slides along the central axis of the workpiece. The rear wedge and the centering front wedge are located at both ends of the central axis of the workpiece and are used to position the central axis of the workpiece.

[0010] The base plate is provided with hollow holes for positioning and exposing the first machined surface of the workpiece bottom, as well as pads for supporting the recesses between the first machined surfaces.

[0011] The first L-shaped pressure block is located on both sides of the rear wedge block and is used to press the workpiece. The second L-shaped pressure block is located on both sides of the base plate and is used to press the workpiece.

[0012] The rear wedge has first support inclined surfaces at both ends facing the workpiece, which are used to support the workpiece surface. The first support inclined surfaces are perpendicular to the base plate and have an angle of 30-60 degrees with the central axis of the workpiece.

[0013] The two ends of the centering front wedge facing the workpiece are respectively provided with second supporting inclined surfaces. The second supporting inclined surfaces are perpendicular to the base plate and have an angle of 30-60 degrees with the central axis of the workpiece.

[0014] The pads are distributed between two consecutive first machined surfaces arranged along the central axis of the workpiece.

[0015] The device also includes a side top plate, which is located on the side of the centering front wedge facing away from the workpiece. The centering front wedge and the side top plate are arranged in parallel, and the side top plate is provided with a first threaded hole. A top threaded rod is provided in the first threaded hole. One end of the top threaded rod passes through the first threaded hole and pushes the centering front wedge towards the workpiece.

[0016] A guide pin is also provided between the side top plate and the centering front wedge.

[0017] A reset spring is fitted on the guide pin. The spring is in tension spring mode, with one end connected to the side of the top plate facing the centering front wedge and the other end connected to the side of the centering front wedge facing the top plate.

[0018] The second L-shaped pressure block includes a second pressure block body, a second nut, and a second double-ended screw. One end of the second double-ended screw is screwed into the base plate, and the other end passes through the second L-shaped pressure block and is fixed by the second double-ended screw.

[0019] The rear wedge is fixed by fixing bolts.

[0020] The number of the perforated holes is the same as the number of the first processed surfaces.

[0021] The base plate is provided with connecting plates at both ends.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The center axis of the workpiece is positioned by the rear wedge and the centering front wedge, which can expose the second machining surface. Combined with the hollow hole, the first machining surface can be exposed. Combined with the third machining surface that can be exposed by itself, the workpiece is clamped by the second L-shaped pressure block and the first L-shaped pressure block. Thus, by combining horizontal limiting and vertical clamping, the workpiece only needs to be clamped once to expose all the surfaces that need to be machined, without repeated clamping, which improves efficiency.

[0024] 2. Through the first and second supporting inclined surfaces, an outward supporting force is formed, thereby achieving the center positioning of the workpiece while exposing the second machining surface.

[0025] 3. The method of advancing the centering wedge block through the side top plate can reduce the convenience of workpiece clamping.

[0026] 4. The return spring can further improve the convenience of workpiece clamping, and during contact positioning, the operation can be performed on the workpiece without moving the centering wedge, thus ensuring safety. Attached Figure Description

[0027] Figure 1 This is a first-view schematic diagram of the workpiece processed according to this utility model.

[0028] Figure 2 This is a second-view schematic diagram of the workpiece processed according to this utility model.

[0029] Figure 3 A third-view schematic diagram of the workpiece processed by this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of this utility model;

[0031] Figure 5 This is a schematic diagram of the base plate portion of this utility model;

[0032] Figure 6 This is a schematic diagram of the first L-shaped pressure block of this utility model;

[0033] The components are: 1. workpiece, 2. base plate, 3. pad block, 4. first L-shaped pressure block, 5. front centering wedge block, 6. second L-shaped pressure block, 7. rear wedge block, 8. side top plate, 1-1. first machined surface, 1-2. second machined surface, 1-3. third machined surface, 2-1. floor hole, 6-1. second double-ended screw, 6-2. second nut, 6-3. second pressure block body, 8-1. top threaded rod, 8-2. positioning bolt. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0035] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "proximal end," "farthest end," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0038] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0041] A support and limiting device for a trailer towing base, comprising:

[0042] The base plate 2 and the rear wedge block 7, the centering front wedge block 5, the second L-shaped pressing block 6, and the first L-shaped pressing block 4 set on the base plate.

[0043] The rear wedge 7 is fixed on the base plate 2, and the centering front wedge 5 is slidably set on the base plate 2 and slides along the central axis of the workpiece. The rear wedge 7 and the centering front wedge 5 are located at both ends of the central axis of the workpiece 1 and are used to position the central axis of the workpiece 1.

[0044] The base plate 2 is provided with a hollow hole 2-1 for positioning and exposing the first machined surface 1-1 of the workpiece 1, and a pad 3 for supporting the recessed parts between each first machined surface 1-1.

[0045] The first L-shaped pressure block 4 is located on both sides of the rear wedge block 7 and is used to press the workpiece 1. The second L-shaped pressure block 6 is located on both sides of the base plate 2 and is used to press the workpiece 1.

[0046] The center axis of workpiece 1 is positioned by the rear wedge 7 and the centering front wedge 5, which exposes the second machining surface 1-2. Combined with the hollow hole 2-1, the first machining surface 1-1 can be exposed. Combined with the third machining surface 1-3 that can be exposed by itself, the workpiece 1 is pressed by the second L-shaped pressure block 6 and the first L-shaped pressure block 4. Thus, by combining horizontal limiting with vertical pressing, workpiece 1 only needs to be clamped once to expose all the surfaces that need to be processed, without repeated clamping, which improves efficiency.

[0047] In this embodiment, the rear wedge 7 has first supporting inclined surfaces at both ends facing the workpiece 1 to support the surface of the workpiece 1. The first supporting inclined surfaces are perpendicular to the base plate and have an angle of 30-60 degrees with the central axis of the workpiece 1. Similarly, the centering front wedge 5 has second supporting inclined surfaces at both ends facing the workpiece 1. The second supporting inclined surfaces are perpendicular to the base plate and have an angle of 30-60 degrees with the central axis of the workpiece 1. The distance between the two first supporting surfaces gradually increases from the side away from the centering front wedge 5 to the side near the centering front wedge 5. Similarly, the distance between the two second supporting surfaces gradually increases from the side away from the rear wedge 7 to the side near the centering front wedge 5.

[0048] Thus, through the first and second supporting inclined surfaces, an outward supporting force is formed, thereby achieving the center positioning of the workpiece while exposing the second machining surface 1-2.

[0049] Furthermore, in this embodiment, the pad 3 is distributed between two consecutive first processing surfaces 1-1 arranged along the central axis of the workpiece 1, so that the second processing surface 1-2 can be processed from any direction perpendicular to the base plate 2 without obstructing the second processing surface 1-2.

[0050] Furthermore, in this embodiment, the device also includes a side top plate 8, which is located on the side of the centering front wedge 5 facing away from the workpiece 1. The centering front wedge 5 and the side top plate 8 are arranged in parallel, and the side top plate 8 is provided with a first threaded hole. A top threaded rod 8-1 is provided in the first threaded hole, and one end of the top threaded rod 8-1 passes through the first threaded hole and pushes the centering front wedge 5 to move toward the workpiece 1. By advancing the centering front wedge 5 through the side top plate 8, the ease of clamping the workpiece 1 can be improved.

[0051] In some preferred embodiments, a guide pin is provided between the side top plate 8 and the centering front wedge 5, thereby improving the stability of the centering front wedge 5 during the pushing process. Furthermore, in some embodiments, a return spring is fitted onto the guide pin. The spring is in a tension spring state, with one end connected to the side of the side top plate 8 facing the centering front wedge 5, and the other end connected to the side of the centering front wedge 5 facing the side top plate 8. The return spring further improves the ease of clamping the workpiece 1, and during contact positioning, the operation can be performed on the workpiece 1 without moving the centering front wedge 5, ensuring safety.

[0052] In this embodiment, the second L-shaped pressure block 6 includes a second pressure block body 6-3, a second nut 6-2, and a second double-ended screw 6-1. One end of the second double-ended screw 6-1 is screwed into the base plate 2, and the other end passes through the second L-shaped pressure block 6 and is fixed by the second double-ended screw 6-1. In addition, the structure of the first L-shaped pressure block 4 is similar to that of the second L-shaped pressure block 6.

[0053] Generally, the rear wedge 7 is fixed by fixing bolts 7-1, and the number of hollow holes 2-1 is the same as the number of the first machined surface 1-1. In addition, connecting plates are provided at both ends of the base plate for easy connection with processing equipment.

[0054] The usage process of this application is as follows:

[0055] Place workpiece 1 on base plate 2 as shown in the figure. The six first machining surfaces 1-1 of the bottom of workpiece 1 are recessed into the six hollow holes 2-1 of base plate 2. The pads 3 on base plate 2 fit the stepped surfaces of workpiece 1, thus completing the initial placement of workpiece 1.

[0056] Then, after the rear end notch of workpiece 1 is aligned with the wedge 7, the centering wedge 5 is pushed into the front notch of workpiece 1 and locked by tightening the top thread rod 8-1 on the side top plate 8. There are two guide pins between them to ensure that the centering wedge 5 will not shift, thus achieving centering positioning.

[0057] After centering and positioning, tighten the second L-shaped pressure block 6 and the first L-shaped pressure block 4 to press and fix the workpiece 1. Then screw in the positioning bolts 8-2 on the side top plate 8 to press against the two sides of the front section of the workpiece 1 to prevent the workpiece from shaking during the rotation of the 4 axes.

Claims

1. A support and limiting device for a trailer towing base, characterized in that, include: The base plate (2) and the rear wedge block (7), the centering front wedge block (5), the second L-shaped pressure block (6) and the first L-shaped pressure block (4) are set on the base plate. The rear wedge (7) is fixed on the base plate (2), and the centering front wedge (5) is slidably disposed on the base plate (2) and slides along the central axis of the workpiece. The rear wedge (7) and the centering front wedge (5) are located at both ends of the central axis of the workpiece (1) and are used to position the central axis of the workpiece (1). The base plate (2) is provided with a hollow hole (2-1) for positioning and exposing the first machining surface (1-1) of the bottom surface of the workpiece (1), and a pad (3) for supporting the recess between each first machining surface (1-1). The first L-shaped pressure block (4) is located on both sides of the rear wedge block (7) and is used to press the workpiece (1). The second L-shaped pressure block (6) is located on both sides of the base plate (2) and is used to press the workpiece (1).

2. The support and limiting device for a trailer towing base according to claim 1, characterized in that, The rear wedge (7) has a first support slope at each end facing the workpiece (1) for supporting the surface of the workpiece (1). The first support slope is perpendicular to the base plate and has an angle of 30-60 degrees with the central axis of the workpiece (1). The two ends of the centering front wedge (5) facing the workpiece (1) are respectively provided with second supporting inclined surfaces. The second supporting inclined surfaces are perpendicular to the base plate and have an angle of 30-60 degrees with the central axis of the workpiece (1).

3. A support and limiting device for a trailer towing base according to claim 1, characterized in that, The pad (3) is distributed between two consecutive first machining surfaces (1-1) arranged along the central axis of the workpiece (1).

4. A support and limiting device for a trailer towing base according to claim 1, characterized in that, The device also includes a side top plate (8), which is located on the side of the centering front wedge (5) facing away from the workpiece (1). The centering front wedge (5) and the side top plate (8) are arranged in parallel, and the side top plate (8) is provided with a first threaded hole. A top threaded rod is provided in the first threaded hole. One end of the top threaded rod passes through the first threaded hole and pushes the centering front wedge (5) towards the workpiece (1).

5. A support and limiting device for a trailer towing base according to claim 4, characterized in that, A guide pin is also provided between the side top plate (8) and the centering front wedge block (5).

6. A support and limiting device for a trailer towing base according to claim 5, characterized in that, A reset spring is fitted on the guide pin. The spring is in tension spring working state, with one end connected to the side of the side top plate (8) facing the centering front wedge (5) and the other end connected to the side of the centering front wedge (5) facing the side top plate (8).

7. A support and limiting device for a trailer towing base according to claim 1, characterized in that, The second L-shaped pressure block (6) includes a second pressure block body (6-3), a second nut (6-2), and a second double-ended screw (6-1). One end of the second double-ended screw (6-1) is screwed into the base plate (2), and the other end passes through the second L-shaped pressure block (6) and is fixed by the second double-ended screw (6-1).

8. A support and limiting device for a trailer towing base according to claim 1, characterized in that, The rear wedge (7) is fixed by a fixing bolt (7-1).

9. A support and limiting device for a trailer towing base according to claim 1, characterized in that, The number of the hollow holes (2-1) is the same as the number of the first processed surfaces (1-1).

10. A support and limiting device for a trailer towing base according to claim 1, characterized in that, The base plate is provided with connecting plates at both ends.

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