A positioning pin device and fixture suitable for multiple vehicle models

Abstract

This invention, belonging to the automotive industry, discloses a locating pin device suitable for multiple vehicle models and a jig for using the locating pins. By providing multiple locating pins with different cross-sectional shapes that move three-dimensionally according to a set displacement, the locating pins do not need to be replaced when switching between two or more vehicle models on a production line. This design ensures the rigidity of the locating pins while preventing interference when switching between different vehicle models. It can be applied to the assembly of components requiring positioning for various vehicle models.

Description

Technical Field

[0001] The invention belongs to the field of automobile industry, and particularly discloses a locating pin device suitable for multiple vehicle models and a jig using the locating pin device. Background Art

[0002] Existing body part aperture positioning systems use locating pins, typically fixed or retractable. To share parts between different vehicle models, a sliding mechanism is required to switch between different locating pin positions. Typically, only two positions can be switched, meaning two different vehicle models can be shared. Furthermore, the apertures of the body parts must be identical between the two models.

[0003] If more models are required, a windmill mechanism is required to switch the locating pin position, which can generally achieve a maximum of four models. However, this type of windmill mechanism takes up a large space, affecting the welding of body parts, and this mechanism is expensive and is not suitable for use in general multi-model switching. Summary of the Invention

[0004] To solve the problems in the background technology, the present invention provides a positioning pin device suitable for multiple vehicle models and a fixture using the same. The specific technical solutions are as follows:

[0005] A positioning pin device suitable for multiple vehicle models comprises two or more axially parallel positioning pins capable of three-dimensional movement, wherein at least one positioning pin can realize axial movement relative to the other positioning pins.

[0006] This design allows each locating pin to be moved and adjusted to adapt to the positioning position of different models, thereby achieving the positioning of multiple models with various positioning hole types.

[0007] Preferably, the cross-section of the positioning pin that can realize axial movement relative to the other positioning pins is circular, and the cross-sections of the other positioning pins are C-shaped. When the cross-sections are projected onto the same plane, the projection of the circle is located within the projection of the C-shape.

[0008] In this way, the locating pin with a C-shaped cross section only needs to undergo a simple axial relative movement with the locating pin with a circular cross section to expose the set locating pin on the pin of other locating pins, and adapt to different locating hole types at the same position without any interference. Due to the existence of the opening, the C-shape is more convenient for placing a circular locating pin therein than the O-shape.

[0009] Preferably, a plurality of axial edges are provided on the outer facade of the other positioning pins.

[0010] For non-circular positioning hole types, the positioning pin is provided with an axial edge as a reference datum, which makes it easier to achieve precise positioning in a direction perpendicular to the axis of the positioning pin.

[0011] Preferably, the top of the positioning pin capable of axial movement relative to the other positioning pins is cylindrical and smoothly transitions to a conical shape.

[0012] The present invention also provides a jig, which includes the above-mentioned positioning pin device suitable for multiple vehicle models.

[0013] Beneficial effects of the present invention:

[0014] The locating pin device disclosed herein utilizes a circular locating pin nested within an axially ridged C-shaped locating pin. This device not only achieves conventional circular hole positioning, but also allows for positioning of rear-end square holes on vehicle bodies, particularly on the longitudinal beams of commercial vehicle floor frames. By utilizing a linear track and telescopic cylinder, it enables aperture positioning for a variety of vehicle types. This invention also offers the advantages of a short processing cycle and low manufacturing and maintenance costs, making it suitable for positioning during vehicle assembly and welding processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram reflecting the detailed structure of a positioning pin in an embodiment of the present invention;

[0016] Figure 2 A schematic diagram of the overall structure of a positioning pin device in an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure in which the positioning pin is allowed to move in the X direction in an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure in which the positioning pin is allowed to move in the Y direction in an embodiment of the present invention;

[0019] In the figure: 1. Circular locating pin; 2. C-shaped locating pin; 3. C-shaped locating pin axial telescopic cylinder; 4. Circular locating pin axial telescopic cylinder; 5. X-axis linear rail; 6. X-axis drive cylinder; 7. Y-axis linear rail; 8. Y-axis drive cylinder. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below with reference to the accompanying drawings and specific embodiments. It is apparent that the described embodiments are only a portion of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on these embodiments without inventive effort are also within the scope of protection of the present invention.

[0021] like Figure 1As shown, the locating pin device, which can accommodate multiple vehicle models, includes a circular locating pin 1 with a conical top and a C-shaped locating pin 2 with multiple ridges along its axial direction. The circular locating pin 1 is initially installed within the C-shaped locating pin 2. The C-shaped locating pin axial telescopic cylinder 3 retracts and contracts to adjust the Z-direction (vertical) height of the C-shaped locating pin 2, while the circular locating pin axial telescopic cylinder 4 retracts and contracts to adjust the Z-direction height of the circular locating pin 1. This allows the desired locating pin to be exposed above the tops of the other locating pins, accommodating the switching of locating pins of different apertures and shapes across multiple vehicle models.

[0022] Assume there are four different car models, A, B, C, and D. The locating holes of car models A and B are C-shaped, while those of car models C and D are circular. A positioning mechanism is needed to enable the switching and sharing of car models A, B, C, and D. This requires two switching operations: the shape of the locating hole and the position of the locating hole. The switching of the locating hole shape involves switching between a C-shaped locating pin and a circular locating pin. The switching of the locating hole position can be broken down into switching in the three spatial coordinate directions of X, Y, and Z. Figure 2 As shown: X, Y and Z constitute the spatial coordinate system

[0023] How to switch the shapes of the positioning holes for the four types of vehicle types A, B, C and D? The round positioning pin 1 positions vehicle types C and D, and the C-shaped positioning pin 2 positions vehicle types A and B.

[0024] How to switch the spatial position of the positioning holes of the four models A, B, C and D? First, decompose the Z direction, such as Figure 2 The C-shaped locating pin axial telescopic cylinder 3 shown in the figure can switch the two Z-direction heights of the C-shaped locating pin (i.e., vehicle types A and B) by extending and retracting, and the circular locating pin axial telescopic cylinder 4 can switch the two Z-direction heights of the circular locating pin (i.e., vehicle types C and D) by extending and retracting.

[0025] Then decompose the X direction, such as Figure 3 As shown, two positions in the X direction can be achieved by extending and retracting the X-direction linear rail 5 and the X-direction driving cylinder 6. The position is adjusted to the right position by installing a limit block on the X-direction linear rail 5 to lock the position.

[0026] Then decompose the Y direction, such as Figure 4 As shown, two positions in the Y direction can be achieved by extending and retracting the Y-direction linear rail 7 and the Y-direction driving cylinder 8. The position is adjusted to the right position by installing a limit block on the Y-direction linear rail 7 to lock the position.

[0027] Fixing the positioning pin device adapted to multiple vehicle models on a jig to achieve assembly positioning of different vehicle models constitutes another embodiment of the present specification: a jig using the positioning pin device adapted to multiple vehicle models.

[0028] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A positioning pin device suitable for multiple vehicle models, characterized in that It includes two or more axially parallel positioning pins capable of three-dimensional movement, at least one of which can achieve axial movement relative to the other positioning pins; The cross section of the positioning pin that can achieve axial movement relative to the other positioning pins is circular, and the cross section of the other positioning pins is C-shaped. When the cross sections are projected onto the same plane, the projection of the circle is located within the projection of the C-shape.

2. A positioning pin device adapted to multiple vehicle types as claimed in claim 1, characterized in that: A plurality of axial edges are provided on the outer facade of the other positioning pins.

3. A positioning pin device adapted to multiple vehicle types as claimed in claim 2, characterized in that: The top of the positioning pin capable of realizing axial movement relative to the other positioning pins is cylindrical and smoothly transitions to a conical shape.

4. A jig, characterized by: The invention comprises a positioning pin device according to any one of claims 1 to 3 and adapted to multiple vehicle models.

Images