Positioning drill jig for machining radial hole in box bearing hole
By designing a positioning drill jig suitable for housing bearing holes, the problem of frequent drill jig replacement was solved, enabling efficient machining of radial holes in housing bearing holes, reducing costs and improving machining efficiency and accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NGC (BAOTOU) DRIVE EQUIP CO LTD
- Filing Date
- 2025-09-01
- Publication Date
- 2026-07-31
AI Technical Summary
When machining radial holes in the bearing housing, frequent changes of the drill jig are required, which increases manpower, material resources and costs, making it difficult to achieve efficient machining.
Design a positioning drill jig including a drill jig body and a drill jig cover. The drill jig body has radial holes and threaded holes on its side wall. The drill jig cover is fixed by screws and coaxial positioning is achieved with the help of positioning pins and copper screws. It is suitable for machining bearing holes of the same diameter in different housings.
It achieves the versatility and commonality of drilling jigs, reduces manufacturing costs, and improves processing efficiency and part precision.
Smart Images
Figure CN224574729U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drilling mold technology, and in particular to a positioning drilling mold for machining radial holes inside bearing housings. Background Technology
[0002] The positioning method of drill jigs is crucial to ensuring drilling accuracy. It primarily relies on the contact between the positioning element and the workpiece's reference surface to restrict the workpiece's degrees of freedom and ensure accurate machining position. Common positioning methods can be categorized into four types based on the type of positioning reference: planar positioning, external cylindrical positioning, internal hole positioning, and combined surface positioning. In the machining of box-type parts, our company primarily uses combined surface positioning with drill jigs. This is to better ensure the dimensional and positional accuracy of the machining elements while the workpiece is fixed in place by the drill jig.
[0003] When drilling oil holes or other types of holes in bearing holes of housings using a hand drill, the different heights of bearing holes of the same diameter in different housings and the variety of radial hole sizes require frequent drilling jigs to meet processing needs, resulting in a continuous increase in manpower, material resources, time and processing costs. Utility Model Content
[0004] The purpose of this utility model is to provide a positioning drill jig for machining radial holes inside bearing housings, which effectively avoids frequent drilling jig casting and greatly improves machining efficiency.
[0005] This utility model is implemented by the following technical solution: a positioning drill jig for machining radial holes in the bearing hole of a housing, comprising a drill jig body and a drill jig cover; the drill jig body is a cylindrical structure, the side wall of the drill jig body is machined with a number of radial holes, and the end face of the drill jig body is provided with a number of threaded holes arranged circumferentially; the drill jig cover is an arc-shaped plate, the inner edge of which is fixed to the end face of the drill jig body by screws passing through the corresponding threaded holes, and the drill jig cover is provided with a connecting through hole.
[0006] Furthermore, a drill sleeve is tightly fitted inside the radial hole.
[0007] Furthermore, the drill jig cover is coaxial with the drill jig body, and the inner wall of the drill jig cover is on the same curved surface as the inner wall of the drill jig body.
[0008] Furthermore, a positioning pin is provided between the drill jig cover and the drill jig body.
[0009] Furthermore, copper screws are threaded through the sidewalls of the drill jig from the inside out radially.
[0010] Advantages of this invention: This drill jig can be used to process radial holes of the same diameter bearing holes at different heights and within different housings, thereby achieving the versatility and commonality of the drill jig, reducing manufacturing costs, lowering manpower consumption, and improving parts processing efficiency.
[0011] Based on the different radii and angles of the planar positioning holes of different parts, by changing different drill jig covers and machining radial holes of different heights and diameters in the drill jig body, a box body with interchangeable positioning combined surface positioning drill jig can be machined for multiple bearing holes of the same diameter but with different heights and internal radial holes. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the structure of this utility model.
[0014] Figure 2 for Figure 1 AA sectional view.
[0015] Figure 3 for Figure 1 BB cross-sectional view.
[0016] Figure 4 for Figure 3 A magnified view of part C.
[0017] Figure 5 This is a schematic diagram showing the installation and use of the drill jig body and drill jig cover on the box body according to this utility model.
[0018] The components in the attached diagram are labeled as follows: Drill jig body 1, radial hole 1.1, threaded hole 1.2, drill jig cover 2, connecting through hole 2.1, screw 3, drill sleeve 4, locating pin 5, copper screw 6. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.
[0021] like Figures 1 to 5 As shown, this embodiment provides a positioning drill jig for machining radial holes in bearing housings, comprising a drill jig body 1 and a drill jig cover 2. The drill jig body 1 is a cylindrical structure, using the inner diameter and bottom surface of the bearing housing as a reference, and the outer wall of the drill jig body 1 fits against the hole wall of the bearing housing. According to the position and size of the required machining elements (radial oil holes, stop pin holes, etc.) in the bearing holes of the same diameter in different housings, several radial holes 1.1 are machined on the side wall of the drill jig body 1 according to the drawing requirements, so as to ensure that the position and size of the machined elements after the electric drill passes through the radial holes 1.1 are consistent with the drawing requirements. A drill sleeve 4 is tightly fitted inside the radial holes 1.1. The material of the drill jig body 1 is Q235, which has a low hardness. In order to avoid the radial holes 1.1 on the drill jig body 1 from being deformed by the lateral impact force of the drill bit during the drilling process, the drill sleeve 4 with higher hardness can be set to effectively avoid the deformation of the radial holes 1.1 and ensure machining accuracy. Moreover, the drill sleeve 4 is also easy to replace.
[0022] The end face of the drill jig body 1 is provided with several threaded holes 1.2 arranged circumferentially. The drill jig cover 2 is an arc-shaped plate. A positioning pin 5 passes through the drill jig cover 2 and the drill jig body 1. The inner edge of the drill jig cover 2 is fixed to the end face of the drill jig body 1 by screws 3 passing through the corresponding threaded holes 1.2. According to the on-site processing requirements, the drill jig cover 2 is first positioned in the predetermined position of the drill jig body 1 by the positioning pin 5, and then fixed by the screws 3. This ensures that the drill jig cover 2 and the drill jig body 1 are coaxial, and the inner wall of the drill jig cover 2 and the inner wall of the drill jig body 1 are on the same curved surface, thereby ensuring that the position and dimensions of the processing elements on-site are error-free.
[0023] The drill jig cover 2 has a connecting through hole 2.1. The drill jig is installed and fixed on the box body by bolts through the connecting through hole 2.1. The connecting through hole 2.1 should be machined with the threaded hole 1.2 on the cover surface of the box body as the reference. The diameter and position of the connecting through hole 2.1 should be consistent with the positioning threaded hole 1.2 on the cover surface of the box body to ensure that the axial position of the machining element is consistent with the drawing requirements.
[0024] A copper screw 6 is threaded through the side wall of the drill jig body 1 from the inside to the outside in the radial direction. The end of the copper screw 6 is pressed against the inner wall of the bearing hole of the housing, thereby achieving secondary locking and fixing of the drill jig to the housing. In addition, after the processing is completed, after loosening the copper screw 6 and the connection between the drill jig cover 2 and the housing, the copper screw 6 can be used as a handle to facilitate the removal of the drill jig from the bearing hole of the housing.
[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A positioning drill jig for machining radial holes inside bearing holes of a housing, characterized in that, It includes the drill jig body and the drill jig cover; The drill jig body is a cylindrical structure, and the side wall of the drill jig body is machined with several radial holes. Several threaded holes arranged circumferentially are opened on the end face of the drill jig body. The drill jig cover is an arc-shaped plate, and its inner edge is fixed to the end face of the drill jig body by screws passing through the corresponding threaded holes. A connecting through hole is opened on the drill jig cover.
2. The positioning drill jig for machining radial holes inside bearing holes of a housing according to claim 1, characterized in that, A drill sleeve is tightly fitted inside the radial hole.
3. The positioning drill jig for machining radial holes inside bearing holes according to claim 1, characterized in that, The drill jig cover is coaxial with the drill jig body, and the inner wall of the drill jig cover is on the same curved surface as the inner wall of the drill jig body.
4. The positioning drill jig for machining radial holes inside bearing holes of a housing according to claim 1, characterized in that, A positioning pin is provided between the drill jig cover and the drill jig body.
5. The positioning drill jig for machining radial holes inside bearing holes of a housing according to claim 1, characterized in that, The sidewall of the drill jig is radially threaded with copper screws from the inside to the outside.