Drilling tool for lock rotating shaft
By designing a drilling fixture for the lock head shaft and adopting structures such as positioning holes, step supports, and baffles, the problems of low efficiency and inaccurate positioning of the lock head shaft through holes were solved, and efficient and stable drilling processing was achieved.
Patent Information
- Application Number
- CN202520586733.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-31
AI Technical Summary
In the current production and processing of lock head shafts, the through-hole method is inefficient and cannot meet the needs of mass production. It also has problems such as frequent drill bit movement, inaccurate positioning, and burrs affecting installation.
A drilling fixture for a lock head shaft was designed, comprising a positioning hole, a step for mounting, a clamping bolt, a baffle, and a chip removal groove. The positioning hole accommodates the central cylindrical part of the lock head shaft, which is fixed by the step for mounting and the clamping bolt. The height of the baffle is adjustable, and the chip removal groove removes iron filings, thus achieving stable positioning and efficient drilling.
It improves the efficiency and positioning accuracy of the lock head shaft through hole, reduces burr generation, simplifies the installation and disassembly process, and meets the needs of mass production.
Smart Images
Figure CN223820103U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a through hole clamp technical field, concretely relates to a drilling tool of lock head pivot. BACKGROUND
[0002] The lock head pivot is one of the essential accessories in the manufacturing process of railway freight cars, and the production and processing of the accessory also become necessary links of the total production process. In the production and processing of the existing lock head pivot, the conventional method for the through hole of the lock head pivot is to use a marking needle to mark the position of the lock head hole, clamp the lock head pivot by a vice, and then use a drill bit to find the position and drill the through hole of the lock head pivot; the second method is to clamp multiple lock head pivots on a tool, press them tightly, and then use a positioning groove to position and drill the through hole.
[0003] There are at least 8 lock head pivots for each car, and the conventional through hole method needs to frequently clamp and unclamp the accessories for each lock head pivot through hole, and each time the drill bit needs to be visually positioned, so the method has low production efficiency and cannot meet the needs of batch production. The second method frequently moves the drill bit, and when a radial drill press is used, the large arm is heavy, so the work intensity is high, and when the radial drill press is used, it also cannot meet the assembly needs of freight car production. After lathe processing, there may be a small protrusion at the end of the circular center, and burrs may be generated at the ends of the flat surface of the lock head pivot after milling processing, which will affect the positioning size and installation effect, causing jamming or inaccurate positioning. UTILITY MODEL CONTENTS
[0004] The utility model aims at solving the technical problems in the prior art, and particularly innovatively provides a drilling tool for lock head pivot, which does not need to move the drill bit and position multiple times, and can effectively improve the through hole efficiency.
[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a drilling tool for lock head pivot, which comprises a main body, a positioning hole extending forward and backward is formed in the middle part of the main body, the positioning hole is used for accommodating the middle cylindrical part of the lock head pivot, a rest step is protruded on the bottom of the rear end of the hole in the positioning hole corresponding to the flat head part of the lock head pivot, a clamping bolt located directly above the rest step is threadedly connected to the main body, the clamping bolt is used for clamping the flat head part of the lock head pivot on the rest step on the lower side, a through hole is vertically formed in the top of the main body on the front side, a sleeve is arranged in the through hole, a chip removal groove is recessed on the upper and lower sides of the positioning hole, and a baffle is arranged on the rear side of the main body directly behind the positioning hole.
[0006] In the above-mentioned scheme, the bottom of the chip removal groove on the lower side is through, and a bottom plate is arranged on the bottom of the main body. The generated iron chips can directly fall on the bottom plate.
[0007] In the above solution, a step is also provided at the top of the rear end of the positioning hole. The two steps, one above the other, can better constrain the flat head of the lock head shaft, making the positioning more stable.
[0008] In the above scheme: both the left and right ends of the baffle are provided with mounting holes for mounting bolts to pass through, and the baffle can be detachably installed on the main body by mounting bolts.
[0009] In the above solution: the mounting holes on the baffle are all vertically extending strip holes, which are used to adjust the height of the baffle. The position of the baffle can be adjusted according to the product.
[0010] In the above solution, the bottom side of the strip-shaped hole is through-hole to form a notch. This allows the baffle to be directly clamped onto the bolt, eliminating the need to completely remove the bolt during installation and disassembly, thus improving installation efficiency.
[0011] In summary, due to the adoption of the above technical solutions, the beneficial effects of this utility model are: improved installation and disassembly efficiency, and accurate positioning. The positioning holes and abutment steps can be adapted to the shape of the lock head shaft. The sleeve can position the drill sleeve, making it convenient to check whether the positioning is accurate after installation. The rear mounting baffle can prevent burrs from interfering with and adjusting the size. The chip removal groove can better prevent the accumulation of iron filings and burrs, solving the problem of difficulty in removing the lock head shaft after creating a through hole. Attached Figure Description
[0012] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0013] Fig. 1 This is a perspective view of the utility model and the workpiece.
[0014] Fig. 2 This is a perspective view of the present invention.
[0015] Fig. 3 This is a rear view of the present invention.
[0016] Fig. 4 This is a cross-sectional view of the present invention. Detailed Implementation
[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0018] like Figs. 1-4As shown, a drilling fixture for a lock cylinder shaft includes a main body 1. A positioning hole 1a extending forward and backward is provided in the middle of the main body 1, which accommodates the cylindrical portion of the lock cylinder shaft. Chip removal grooves 1b are recessed on both the upper and lower sides of the positioning hole 1a. The positioning hole 1a is a square hole, and there are arc-shaped transition sections between the positioning hole 1a and the two chip removal grooves 1b. These four arc-shaped transition sections match and are concentric with the cylindrical portion of the lock cylinder shaft, allowing them to contact the cylindrical portion through the arc-shaped transition sections. Redundant space is provided on the left and right sides and the upper and lower sides of the cylindrical portion of the lock cylinder shaft for easy insertion. The bottom of the lower chip removal groove 1b is open, and a base plate 2 is provided at the bottom of the main body 1. The generated iron filings can fall directly onto the base plate 2.
[0019] The bottom and top of the rear end of the positioning hole 1a are both provided with abutment steps 1c corresponding to the flat head of the lock head shaft. The two abutment steps 1c can better constrain the flat head of the lock head shaft, making the positioning more stable. A clamping bolt 4 is threaded onto the main body 1 and is located directly above the abutment step 1c. The clamping bolt 4 is used to clamp the flat head of the lock head shaft against the lower abutment step 1c, which further improves the fixing effect on the workpiece.
[0020] A through hole is vertically opened on the front side of the top of the main body 1, and a sleeve 3 is installed in the through hole. A baffle 5 is installed on the rear side of the main body 1, which is directly behind the positioning hole 1a. Both the left and right ends of the baffle 5 are provided with mounting holes for mounting bolts to pass through, and can be detachably installed on the main body 1 by mounting bolts.
[0021] The mounting holes on the baffle 5 are all through at the bottom, forming a notch. This not only allows for adjustment of the height of the baffle 5, but also makes it easy to directly clamp the baffle 5 onto the mounting bolts. During installation and disassembly, there is no need to completely remove the bolts, thus improving installation efficiency.
[0022] When drilling through holes, there is no need to move the drill bit for positioning each time, saving time and effort. The rectangular through-hole 1b extending to the bottom of the sleeve 3 eliminates the obstruction caused by burrs generated after drilling when installing and removing parts. The provided step 1c positions the center hole of the lock head shaft relative to the milling horizontal plane, and the through-hole reduces the obstruction caused by burrs generated after milling the lock head shaft when installing and removing parts. The provided positioning hole 1a allows the lock head shaft to be inserted and effectively positions the lock head shaft vertically when drilling through holes. The upper clamping bolt 4 assists the step 1c for positioning and can also be used for tightening during drilling. The baffle 5 serves to position the dimensions during drilling and can be adjusted using the mounting bolts. After the lock head shaft is inserted, the milled groove end face is on the same plane as the tooling, allowing for visual inspection to confirm the accurate positioning of the lock head shaft.
Claims
1. A drilling fixture for a lock head shaft, characterized in that: The device includes a main body (1), which has a positioning hole (1a) extending from front to back in the middle. The positioning hole (1a) is used to accommodate the cylindrical part of the lock head shaft in the middle. The bottom of the rear end of the positioning hole (1a) is provided with a step (1c) corresponding to the flat head part of the lock head shaft. The main body (1) is threaded with a clamping bolt (4) located directly above the step (1c). The clamping bolt (4) is used to clamp the flat head part of the lock head shaft against the step (1c) on the lower side. The top of the main body (1) has a through hole vertically opened on the front side. A sleeve (3) is provided in the through hole. Chip removal grooves (1b) are recessed on both the upper and lower sides of the positioning hole (1a). A baffle (5) is provided on the rear side of the main body (1) to block the positioning hole (1a) directly behind it.
2. The drilling fixture for a lock head shaft according to claim 1, characterized in that: The bottom of the chip removal groove (1b) on the lower side is open, and the bottom of the main body (1) is provided with a base plate (2).
3. The drilling fixture for a lock head shaft according to claim 1, characterized in that: The top of the rear end of the positioning hole (1a) is also provided with a step (1c).
4. The drilling fixture for a lock head shaft according to claim 1, characterized in that: The baffle (5) is provided with mounting holes at both the left and right ends for mounting bolts to pass through, and can be detachably mounted on the main body (1) by mounting bolts.
5. The drilling fixture for a lock head shaft according to claim 4, characterized in that: The mounting holes on the baffle (5) are all vertically extending strip holes, which are used to adjust the height of the baffle (5).
6. The drilling fixture for a lock head shaft according to claim 5, characterized in that: The bottom side of the strip hole is through to form a notch.