CN222971577U

CN222971577U - Steering column blank milling fixture

Info

Publication number: CN222971577U
Application number: CN202422133873.1U
Authority: CN
Inventors: 吴峰
Original assignee: Chongqing Honglei Machinery Manufacturing Co ltd
Current assignee: Chongqing Honglei Machinery Manufacturing Co ltd
Priority date: 2024-08-29
Filing date: 2024-08-29
Publication date: 2025-06-13
Anticipated expiration: 2034-08-29

Abstract

The utility model relates to the technical field of motorcycle parts processing and positioning tooling, specifically a steering column blank milling fixture, including a base, a mounting plate fixed on the base, a clamping mechanism fixed on the mounting plate, and a tightening mechanism; the clamping mechanism includes a positioning block and a sliding assembly relatively arranged at both ends of the mounting plate, and the positioning block and the sliding assembly are both provided with an adjustment assembly, and the adjustment assembly includes an adjustment block rotatably connected to the positioning block and the sliding assembly; the adjustment block includes an integrally formed straight arm section and a gear section, the center of the gear section is rotatably connected with a pin shaft, the bottom end of the pin shaft is fixed on the positioning block and the sliding assembly, and a swing arm is threadedly connected to the top end of the pin shaft, and the swing arm can press and fix the adjustment block. The gear sections of the two blocks mesh with each other, and the straight arm sections of the two section blocks form a V-shaped bayonet. The device can clamp and position blank workpieces of different sizes, has strong applicability, stable clamping, and can ensure the processing accuracy of the workpiece.

Description

Face milling fixture for steering column blank

Technical Field

The utility model relates to the technical field of steering column blank face milling fixtures.

Background

The steering column of the motorcycle is a key component part in a steering system of the motorcycle, the steering column comprises a column and a lower yoke plate fixed below the column, the upper end of the column is connected with a handlebar, the lower yoke plate is used for being connected with a front fork of the motorcycle, the lower end of the front fork is connected with a front wheel, and when the handlebar is rotated by a rider, steering torque can be transmitted to the front wheel through the steering column, and the front wheel steering of the motorcycle is controlled.

The lower yoke plate is a component part of the motorcycle steering column, the blank of the lower yoke plate is made of alloy materials, in order to control the size of a part, improve the surface quality of the part and ensure the assembly performance of the lower yoke plate and a front fork of the motorcycle, the blank of the lower yoke plate is usually required to be subjected to face milling processing, and superfluous materials such as uneven burrs, oxide scales and the like on the surface of the lower yoke plate are removed, so that the structural size of parts is controlled, the assembly surface is ensured to be smooth, and the assembly performance is improved. The bearing is arranged in the lower connecting plate and used for reducing friction between the steering column tube and the front fork and ensuring steering smoothness.

During face milling, a lower yoke plate is required to be fixed by a clamp, such as a clamp for milling the lower yoke plate (bulletin number: CN 203592310U) in the prior art, the technical scheme is that V-shaped blocks are arranged at two ends of a bottom plate, a cushion block is arranged in the middle of the bottom plate, a workpiece is prevented from being arranged on the cushion block, the V-shaped blocks are controlled to be close to the middle by an adjusting screw, and then the workpiece is clamped and fixed, but the following technical problems still exist in the prior art:

In actual production, the sizes of clamped parts of various blanks are different, the V-shaped opening angle of a V-shaped block of a clamp in the prior art is fixed, so that blanks with specific diameter sizes can be clamped, when the blanks with different sizes are clamped, the clamped surfaces of the blanks cannot contact with the optimal stress points of the V-shaped opening, so that the clamping force is unevenly distributed, the clamping positioning effect is poor, if the blanks with larger sizes cannot be clamped, the blanks are loose when the blanks are contacted with a milling cutter, the milling depth of the milled surfaces is out of tolerance or the flatness is not qualified, the blanks are scrapped, the universality of the prior clamp is very poor, and if different clamps are arranged for products with different types, the cost is high, the stacking and the occupied area are high, and therefore, the development of a steering column blank milling surface clamp is needed to be suitable for clamping products with different types.

Disclosure of utility model

The utility model provides a face milling fixture for a steering column blank, which can solve the problems that the universality of the fixture is poor, when blanks of different types are clamped, the clamped face of the blank cannot contact with the optimal stress point of the clamping opening of the fixture, so that the clamping and positioning effects of the blank are poor, and the blank is scrapped due to the fact that the machining dimension of the blank is out of tolerance in the face milling process.

The application provides a technical scheme that the steering column blank face milling fixture comprises a base, a mounting plate fixed on the base, a clamping mechanism fixed on the mounting plate and a jacking mechanism fixed on the mounting plate and used for driving the clamping mechanism to clamp a workpiece, wherein the base comprises a bottom plate and a supporting block fixed on the bottom plate, and the mounting plate is fixed on the upper supporting block;

the clamping mechanism comprises a positioning block and a sliding component which are oppositely arranged at two ends of the mounting plate, wherein the positioning block and the sliding component are respectively provided with an adjusting component, each adjusting component comprises an adjusting block which is rotationally connected to the positioning block and the sliding component, and each adjusting component comprises two adjusting blocks;

The adjusting block comprises a straight arm section and a gear section which are integrally formed, the center of the gear section is rotationally connected with a pin shaft, the bottom end of the pin shaft is fixed on the positioning block and the sliding assembly, the top end of the pin shaft is connected with a swing arm in a threaded manner, and the swing arm can compress and fix the adjusting block;

the gear sections of the two blocks are meshed with each other, and the straight arm sections of the two blocks form V-shaped bayonets.

The beneficial effects are that:

The clamping is stable and high in applicability, the adjusting blocks comprise two parts, namely a straight arm section and a gear section, the straight arm section is used for forming a V-shaped bayonet, the gear sections are mutually meshed, the straight arm sections of the two groups of adjusting blocks can synchronously act, the opening angle of the V-shaped bayonet can be synchronously and uniformly adjusted according to the size and shape of a workpiece blank, blanks of different sizes can be contacted with the optimal stress point on the straight arm section when being clamped, the clamping force during clamping can uniformly act on the workpiece blank, therefore, the clamping stability can be ensured when the blanks of different sizes are clamped, the applicability is high, the dimensional accuracy during milling can be ensured, and the rejection of the blank is avoided.

Further, the sliding component comprises a support fixed on the mounting plate and a sliding block connected to the support in a sliding mode, and a pin shaft of the adjusting component above the sliding block is fixed on the sliding block.

The clamping device has the beneficial effects that the sliding block can slide on the support, so that the adjusting assembly above the sliding block is driven to synchronously slide, and the adjusting block of the adjusting assembly can be contacted with and clamped with the blank stably.

Further, round holes are further formed in the sliding block and the positioning block, positioning pins are arranged in the round holes, extend into tooth grooves of the gear section along the axial direction, and are inserted into the round holes.

The positioning pin extends into the round hole from the tooth groove of the gear section, can clamp the gear section, and after the blank is clamped, the position of the adjusting block is locked and limited, so that the gear section is prevented from being forced to rotate when the milling cutter contacts the surface of the blank in the face milling process, and the stability of clamping the blank is improved.

Further, the tight mechanism in top includes the positioning seat of fixing on the mounting panel, fixes the screw thread cover on the positioning seat, wears to locate the screw thread post in the screw thread cover and fixes the handrail at screw thread post tip, the screw thread post is kept away from the one end of handrail and is T type head, be equipped with a T type groove on the slider, T type head is located T type inslot, and T type head can rotate at T type inslot.

The sliding block has the beneficial effects that the threaded column is driven to axially advance or retreat in the threaded sleeve by rotating the handrail, the T-shaped head of the threaded column is positioned in the T-shaped groove of the sliding block, so that the sliding block can be driven to slide when the handrail is rotated, further the clamping and loosening operation of the adjusting block on the sliding block is controlled, the rotation movement of the threaded column and the threaded sleeve is converted into the linear movement of the sliding block, the operation is simple and convenient, and the stability and the accuracy of the movement of the driving sliding block are ensured.

Further, a plurality of mounting holes are further formed in the mounting plate, and a supporting sleeve is arranged in each mounting hole.

The support sleeve has the beneficial effects that the support sleeve can be used for forming support for the workpiece blank, so that the blank can be horizontally placed on the support sleeve, the clamping force can be conveniently applied to the blank horizontally by the clamping mechanism, and the clamping stability is ensured.

Drawings

Fig. 1 is a front view of the present utility model.

Fig. 2 is a top view of the present utility model.

Fig. 3 is a top view of the adjustment assembly of fig. 2 positioned over the slider.

Fig. 4 is a front view of a workpiece blank placed on a fixture.

Fig. 5 is a top view of fig. 4.

Detailed Description

The following is a further detailed description of the embodiments:

the marks in the drawing of the specification comprise a bottom plate 1, a supporting block 2, a mounting plate 3, a positioning block 4, a supporting sleeve 5, an adjusting block 6, a straight arm section 61, a gear section 62, a swinging arm 7, a pin shaft 8, a sliding block 9, a support 10, a threaded column 11, a threaded sleeve 12, a positioning seat 13, an armrest 14, a positioning pin 15 and a blank 16.

Example 1

As shown in fig. 1 to 4, the face milling fixture for the steering column blank comprises a base, a mounting plate 3 fixed on the base, clamping mechanisms fixed at two ends above the mounting plate 3 and a jacking mechanism positioned at one end of the mounting plate 3, wherein the base comprises a bottom plate 1 and a supporting block 2 fixed on the bottom plate 1, the mounting plate 3 is fixed above the upper supporting block 2, the bottom plate 1 can be connected to a workbench of milling equipment by screws, and the jacking mechanism is used for driving the clamping mechanisms to clamp a workpiece.

As shown in fig. 1, the clamping mechanism comprises a positioning block 4 and a sliding component which are oppositely arranged at two ends of a mounting plate 3, and an adjusting component which is positioned above the positioning block 4 and the sliding component, wherein the positioning block 4 is connected with the mounting plate 3 by a screw, the sliding component comprises a support 10 which is fixed on the mounting plate 3 by a screw and a sliding block 9 which is positioned above the support 10, the support 10 is provided with a sliding groove, a bulge is arranged below the sliding block 9, the bulge can slide in the sliding groove to enable the sliding block 9 to slide relative to the support 10,

As shown in fig. 1 to 3, the adjusting assembly is provided with two groups, respectively above the positioning block 4 and the slider 9. The adjusting assembly comprises an adjusting block 6 rotatably connected to the positioning block 4 and the sliding block 9, and the adjusting assembly is the same in structure, so that the embodiment uses the adjusting assembly above the sliding block 9 as a structural description. As shown in figures 1 and 3, each adjusting assembly comprises two adjusting blocks 6, each adjusting block 6 comprises a straight arm section 61 and a gear section 62 which are integrally formed, the straight arm sections 61 of the two adjusting blocks 6 form a V-shaped bayonet, teeth are arranged on the periphery of the gear section 62, the center of the gear section 62 is rotatably connected with a pin shaft 8, the bottom end of the pin shaft 8 is fixed on a positioning block 4 and a sliding block 9 in figure 1, the top end of the pin shaft 8 is in threaded connection with a swing arm 7 as shown in figure 3, the gear sections 62 of the two groups of adjusting blocks 6 are meshed with each other, and the adjusting blocks 6 can be tightly fixed by screwing the swing arm 7. The sliding block 9 and the positioning block 4 are further provided with round holes, the round holes are internally provided with positioning pins 15, and the positioning pins 15 can extend into tooth grooves of the gear section 62 to be integrated into the round holes, so that the gear section 62 is blocked, the rotation of the gear section 62 is limited, and one end, far away from the adjusting block 6, of the sliding block 9 is further provided with a T-shaped groove.

As shown in fig. 1 and 2, the tightening mechanism comprises a positioning seat 13 fixed on the mounting plate 3 by a screw, a thread sleeve 12 fixed on the positioning seat 13, a thread post 11 penetrating through the thread sleeve 12 and an armrest 14 fixed at the end part of the thread post 11, wherein a transverse through hole is formed in the positioning seat 13, the thread sleeve 12 is in interference fit with the through hole, one end, far away from the armrest 14, of the thread post 11 is a T-shaped head, the T-shaped head is positioned in a T-shaped groove on the sliding block 9, and the T-shaped head can rotate in the T-shaped groove.

As shown in fig. 1, the mounting plate 3 is further provided with a plurality of mounting holes, the mounting holes are internally provided with a supporting sleeve 5, the supporting sleeve 5 is in clearance fit with the mounting holes, and the number and the arrangement positions of the mounting holes can be multiple according to the product, so that the supporting sleeve 5 can be placed in the corresponding mounting holes when the product is switched, and the clamp can be universally used.

The using method of the clamp is as follows:

As shown in fig. 4 and 5, the blank 16 is placed on the supporting sleeve 5, one end of the blank 16, which is close to the positioning block 4, contacts the adjusting block 6 on the positioning block 4, the V-shaped opening angle of the straight arm section 61 of the adjusting block 6 is adjusted, the straight arm section 61 can reach the most appropriate stress position which contacts the upper side surface of the blank 16, the positioning pin 15 is inserted into the round hole of the positioning block 4 along the tooth slot of the gear section 62, the gear section 62 is clamped, then the swing arm 7 on the adjusting block 6 is screwed, the adjusting block 6 is tightly pressed, the V-shaped opening angle of the straight arm section 61 of the adjusting block 6 positioned on the sliding block 9 is also adjusted according to the same method, then the handrail 14 is screwed, the threaded column 11 drives the sliding block 9 to move towards the direction of the blank 16, the adjusting block 6 above the sliding block 9 is close to and clamps the blank 16, and the positioning of the blank 16 is completed, and the face milling can be carried out subsequently.

The above is merely an embodiment of the present utility model, and the present utility model is not limited to the field of the present embodiment, but the specific structure and characteristics of the present utility model are not described in detail. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. A fixture for milling a steering column blank, comprising a base, a mounting plate fixed on the base, a clamping mechanism fixed on the mounting plate, and a clamping mechanism fixed on the mounting plate and used to drive the clamping mechanism to clamp a workpiece; the base comprises a bottom plate and a support block fixed on the bottom plate, the mounting plate is fixed on an upper support block, and is characterized in that:

The clamping mechanism comprises positioning blocks and sliding components relatively arranged at two ends of the mounting plate, the positioning blocks and the sliding components are both provided with adjustment components, the adjustment components comprise adjustment blocks rotatably connected to the positioning blocks and the sliding components, and each adjustment component comprises two adjustment blocks;

The adjusting block comprises an integrally formed straight arm section and a gear section, the center of the gear section is rotatably connected with a pin shaft, the bottom end of the pin shaft is fixed on the positioning block and the sliding assembly, and the top end of the pin shaft is threadedly connected with a swing arm, and the swing arm can press and fix the adjusting block;

The gear segments of the two blocks mesh with each other, and the straight arm segments of the two segment blocks form a V-shaped bayonet.

2. The steering column blank milling fixture according to claim 1 is characterized in that: the sliding assembly includes a support fixed on the mounting plate and a slider slidably connected to the support, and the pin shaft of the adjustment assembly above the slider is fixed on the slider.

3. The fixture for milling the steering column blank according to claim 2 is characterized in that: the slider and the positioning block are also provided with a circular hole, a positioning pin is provided in the circular hole, and the positioning pin extends axially into the tooth groove of the gear segment and is inserted into the circular hole.

4. The steering column blank milling fixture according to claim 3 is characterized in that: the tightening mechanism includes a positioning seat fixed on the mounting plate, a threaded sleeve fixed on the positioning seat, a threaded column inserted in the threaded sleeve and an armrest fixed at the end of the threaded column, the end of the threaded column away from the armrest is a T-shaped head, a T-shaped slot is provided on the slider, the T-shaped head is located in the T-shaped slot, and the T-shaped head can rotate in the T-shaped slot.

5. The fixture for milling the steering column blank according to claim 4 is characterized in that: a plurality of mounting holes are further provided on the mounting plate, and support sleeves are provided in the mounting holes.