A multi-directional precision positioning fixture for gear housing machining

Abstract

The present invention relates to a multi-directional precision positioning fixture for gear housing machining, comprising a multi-directional base and a modular fixture assembly disposed on the multi-directional base. This application achieves flexible installation and precise positioning of the clamping part on the multi-directional base by engaging the sub-base on the surface of the multi-directional base with the docking portion of the modular fixture assembly, combined with the adaptive design of the positioning block and positioning groove. This effectively eliminates clamping offset caused by workpiece geometric differences. The movable groove structure of the docking portion and the electrical connection design of the block-groove, through the integration of the sub-electrical connector and the female electrical connector, realize real-time linkage between the clamping action and external control equipment, thereby supporting dynamic adaptation of the fixture orientation in multi-process collaborative machining. Furthermore, when the operator needs to clamp parts in multiple directions, the clamping part can be installed on sub-bases in different directions, effectively adapting to different machining requirements.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing, specifically to a multi-directional precision positioning fixture for gear housing processing. Background Technology

[0002] Gear housings are critical box-type components in mechanical transmission systems. Their structure typically includes multiple shaft holes, end faces, and complex cavities, requiring high-precision machining to ensure the coaxiality, perpendicularity, and assembly clearance of the gear shaft system. During machining, the gear housing needs stable positioning using a fixture to guarantee the machining accuracy of the cutting tool on the target surface. Existing technologies often employ positioning fixtures for gear housings using three-jaw self-centering chucks, locating pins with planar supports, or V-block clamping structures. However, these fixtures are primarily designed for standard geometric features. For gear housings with asymmetrical cavities, irregular hole systems, or special assembly angles, their clamping stability and positioning accuracy are insufficient to meet complex machining requirements, especially in multi-stage machining processes where cumulative errors are easily generated.

[0003] Currently, gear housing positioning fixtures generally adopt a fixed-plane mounting method, and their clamping structure is usually limited to a single-directional positioning reference. However, when dealing with gear housings of different sizes and models, the rigid fixation of the clamping components limits the fixture's dynamic adaptability to the workpiece contour, resulting in uneven clamping force distribution, which can easily lead to workpiece deformation or clamping failure. Furthermore, there is a spatial angular deviation between the positioning reference point (such as a plane or hole) of the traditional fixture and the actual machining surface of the gear housing. Especially in the machining of helical gear housings or multi-axis hole structures, even a small offset in the clamping position can directly translate into radial runout of the gear ring or excessive coaxiality of the hole system. In addition, existing fixtures are difficult to meet multi-directional machining requirements. For example, in milling, drilling, and tapping processes, frequent adjustments to the fixture orientation or replacement of specialized fixtures are required, which not only reduces production efficiency but also introduces additional positioning errors due to repeated clamping. Therefore, there is an urgent need for a gear housing fixture solution that can achieve multi-directional precise positioning, adapt to complex geometric features, and support multi-process collaborative machining. Summary of the Invention

[0004] To address the above problems, the present invention provides the following technical solution: A multi-directional precision positioning fixture for machining gear housings, characterized in that it comprises: A multi-directional base includes a main base and several sub-bases disposed on the surface of the main base; A modular clamping assembly includes a clamping part capable of clamping a gear housing, and a mating part disposed on a multi-directional base surface, the mating part allowing the clamping part to be inserted therein, such that the clamping part is mounted on the multi-directional base surface. After the clamping part is installed on the multi-directional base via the docking part, the clamping part can be electrically connected to external control equipment through the docking part. Based on the above technical solution, the present invention can be further improved as follows.

[0005] Furthermore, the clamping part includes a support base, a clamping head disposed on the surface of the support base, and a linear drive device disposed on the surface of the support base to provide the clamping head with the power to move. The clamping head can clamp the gear housing under the action of the linear drive device.

[0006] Furthermore, the docking part includes mounting holes on the surfaces of the main base and the sub-base, a docking clamp in the mounting holes, and a fixing bolt for fixing the docking clamp to the surface of the multi-directional base. The mounting holes are adapted to the support base as a whole.

[0007] Furthermore, the docking clamp consists of at least two fixing plates and a connecting rod between the fixing plates, and the surfaces of the fixing plates and the multi-directional base are provided with threaded holes that are compatible with the fixing bolts.

[0008] Furthermore, the surface of the multi-directional base is provided with at least twice the number of threaded holes as the number of fixing bolts.

[0009] Furthermore, the connecting rod surface is provided with a locking block, and the support base surface is provided with a locking groove that matches the locking block.

[0010] Furthermore, the card block and the card slot are respectively provided with mutually compatible sub-electrical connectors and female electrical connectors, which are connected to the linear drive device and the external main control equipment through wires.

[0011] Furthermore, the mounting hole is provided with a movable groove that matches the fixing plate, and at least one fixing plate is located outside the mounting hole.

[0012] Furthermore, the surface of the card block is provided with a sealing cap that can enclose the sub-electrical connector inside.

[0013] Furthermore, the bottom of the support block is provided with a positioning block, and the mounting hole is provided with a positioning groove that matches the positioning block. Beneficial effects

[0014] Compared with the prior art, this application achieves flexible installation and precise positioning of the clamping part on the multi-directional base by cooperating with the sub-base on the surface of the multi-directional base and the docking part of the modular fixture assembly, combined with the adaptation design of the positioning block and the positioning groove. This effectively eliminates clamping offset caused by workpiece geometric differences. The movable groove structure of the docking part and the electrical connection design of the block-groove, through the integration of the sub-electrical connector and the female electrical connector, realize the real-time linkage between the clamping action and the external control equipment. This supports the dynamic adaptation of the fixture position in multi-process collaborative processing. Moreover, when the operator needs to clamp the parts in multiple directions, the clamping part can be installed on the sub-base in different directions, effectively adapting to different processing requirements. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the invention's cross-sectional structure; Figure 2 A schematic diagram of the three-dimensional structure of the clamping part of the invention; Figure 3 A three-dimensional structural diagram of the docking part of the invention; Figure 4 For invention Figure 1 Enlarged structural diagram at point A in the middle; The attached diagram lists the components represented by each number as follows: 1. Multi-directional base; 11. Main base; 12. Sub-base; 2. Modular clamp assembly; 21. Clamping part; 211. Support base; 212. Clamping head; 213. Linear drive device; 214. Positioning block; 22. Docking part; 221. Docking clamp; 222. Fixing bolt; 223. Locking block. Detailed Implementation

[0017] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] 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.

[0020] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the technical product is in use. They are only for the convenience of describing the technology 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. Therefore, they should not be construed as limitations on the technology.

[0021] 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.

[0022] Please see Figure 1 A multi-directional precision positioning fixture for gear housing machining includes a multi-directional base 1 and a modular fixture assembly 2 disposed on the multi-directional base 1.

[0023] The multi-directional base 1 includes a main base 11 and several sub-bases 12 disposed on the surface of the main base 11. The sub-bases 12 can be installed vertically, inclined, or horizontally on the main base 11 to meet the installation requirements of parts of different sizes. The sub-bases 12 can also be connected to the main base 11 by bolts, and the installation position can be adjusted according to the gear housing of different shapes.

[0024] The modular clamping assembly 2 includes a clamping part 21 capable of clamping the gear housing, and a docking part 22 provided on the surface of the multi-directional base 1. The docking part 22 allows the clamping part 21 to be inserted into it, so that the clamping part 21 is mounted on the surface of the multi-directional base 1. After the clamping part 21 is mounted on the multi-directional base 1 through the docking part 22, the clamping part 21 can be electrically connected to an external control device through the docking part 22.

[0025] Specifically, the clamping part 21 includes a support base 211, a clamping head 212 disposed on the surface of the support base 211, and a linear drive device 213 disposed on the surface of the support base 211 to provide the clamping head 212 with the power to move. The clamping head 212 can clamp the gear housing under the action of the linear drive device 213.

[0026] To facilitate the installation of the clamping part 21, the docking part 22 includes mounting holes on the surfaces of the main base 11 and the sub-base 12, a docking clamp 221 disposed in the mounting holes, and a fixing bolt 222 for fixing the docking clamp 221 to the surface of the multi-directional base 1. The mounting holes are adapted to the support base 211. The docking clamp 221 is composed of at least two fixing plates and a connecting rod between the fixing plates. The surfaces of the fixing plates and the multi-directional base 1 are provided with threaded holes adapted to the fixing bolt 222.

[0027] Considering the stability of the docking part 22 and the firmness after installation, the surface of the multi-directional base 1 is provided with at least twice the number of threaded holes as the fixing bolts 222, the surface of the connecting rod is provided with a locking block 223, and the surface of the support base 211 is provided with a locking groove that matches the locking block 223.

[0028] To achieve simultaneous clamping and electrical connection, the card block 223 and the card slot are respectively equipped with compatible sub-electrical connectors and female electrical connectors. The sub-electrical connectors and female electrical connectors are respectively connected to the linear drive device 213 and the external main control equipment through wires.

[0029] In some embodiments, to further ensure the stable movement of the mating clamp 221, the mounting hole is provided with a movable groove adapted to the fixing plate, and at least one fixing plate is located outside the mounting hole. In other embodiments, to prevent machining debris from entering the sub-electrical connector, the surface of the clamping block 223 is provided with a sealing cover that can cover the sub-electrical connector inside, and a positioning block 214 is provided at the bottom of the support block. The mounting hole is provided with a positioning groove that matches the positioning block 214 to ensure the stability of the clamping part 21 when it enters the mounting hole.

[0030] In the description of this technology, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" 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 technology based on the specific circumstances.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-directional precision positioning fixture for machining gear housings, characterized in that, include: The multi-directional base (1) includes a main base (11) and several sub-bases (12) disposed on the surface of the main base (11); The modular clamping assembly (2) includes a clamping part (21) capable of clamping the gear housing, and a mating part (22) provided on the surface of the multi-directional base (1), the mating part (22) allowing the clamping part (21) to be inserted therein, such that the clamping part (21) is mounted on the surface of the multi-directional base (1); After the clamping part (21) is installed on the multi-directional base (1) via the docking part (22), the clamping part (21) can be electrically connected to the external control device via the docking part (22).

2. The multi-directional precision positioning fixture for gear housing machining according to claim 1, characterized in that... The clamping part (21) includes a support base (211), a clamping head (212) disposed on the surface of the support base (211), and a linear drive device (213) disposed on the surface of the support base (211) to provide the clamping head (212) with the power to move. The clamping head (212) can clamp the gear housing under the action of the linear drive device (213).

3. A multi-directional precision positioning fixture for gear housing machining according to claim 2, characterized in that... The docking part (22) includes mounting holes on the surfaces of the main base (11) and the sub-base (12), a docking clamp (221) in the mounting holes, and a fixing bolt (222) for fixing the docking clamp (221) to the surface of the multi-directional base (1). The mounting holes are adapted to the support base (211).

4. A multi-directional precision positioning fixture for gear housing machining according to claim 3, characterized in that... The docking clamp (221) consists of at least two fixing plates and a connecting rod between the fixing plates. The surfaces of the fixing plates and the multi-directional base (1) are provided with threaded holes that are compatible with the fixing bolts (222).

5. A multi-directional precision positioning fixture for gear housing machining according to claim 4, characterized in that... The surface of the multi-directional base (1) is provided with at least twice the number of threaded holes as the fixing bolts (222).

6. A multi-directional precision positioning fixture for gear housing machining according to claim 5, characterized in that... The connecting rod surface is provided with a locking block (223), and the support base (211) surface is provided with a locking groove that matches the locking block (223).

7. A multi-directional precision positioning fixture for gear housing machining according to claim 6, characterized in that... The card block (223) and the card slot are respectively provided with compatible sub-electric connectors and main electrical connectors. The sub-electric connectors and main electrical connectors are respectively connected to the linear drive device (213) and the external main control equipment through wires.

8. A multi-directional precision positioning fixture for gear housing machining according to claim 7, characterized in that... The mounting hole is provided with a movable groove that matches the fixing plate, and at least one fixing plate is located outside the mounting hole.

9. A multi-directional precision positioning fixture for machining gear housings according to claim 8, characterized in that... The surface of the card block (223) is provided with a sealing cover that can enclose the sub-electrical connector inside.

10. A multi-directional precision positioning fixture for machining gear housings according to claim 9, characterized in that... The bottom of the support block is provided with a positioning block (214), and the mounting hole is provided with a positioning groove that is compatible with the positioning block (214).

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