CN221019827U - Hub drilling tooling - Google Patents

Abstract

The utility model discloses a hub drilling tool, which is characterized in that: comprises a workbench, a locating pin, anti-rotation nails, a plurality of elastic support plates and a plurality of corner cylinders; the locating pin is arranged on the workbench and is used for being matched with a central hole of the hub; the elastic support plates are arranged on the workbench, are circumferentially distributed and are used for horizontally supporting the wheel rim of the wheel hub; the rim is arranged on the workbench, circumferentially distributed and used for compressing the hub; the anti-rotation nails are arranged on the workbench and are used for being contacted with the inner wall surface of the rim of the hub and being contacted and matched with spokes of the hub. The utility model adopts a tool structure different from the prior art, can be used for positioning and clamping the hub during drilling, can compress the hub in the up-down direction and perform anti-rotation limiting, and can improve the drilling machining precision and prevent drilling deflection.

Description

Hub drilling tooling

Technical Field

The utility model relates to a hub drilling tool.

Background

The hub is used to support the tire and serves as an important component for connecting the brake drum, wheel disc and axle shaft. The hub (such as hub automobile or motorcycle hub) needs to drill fixing holes (i.e. pre-drilled round holes and then tapped) during production, and the number of the fixing holes is generally 5-12 and is distributed circumferentially.

The hub drilling and fixing hole processing needs to be carried out by a special tool, all positions to be drilled of the hub are required to correspond to all drill bit positions one by one, and the hub cannot be loosened and displaced in the processing process. The prior art closest to the application is a hub drilling positioning table (application number 2015209478748) which comprises a tray and a chassis, wherein the tray and the chassis are connected through a bearing at the axle center, a centering column and an arc-shaped tightening mechanism coaxial with the centering column are arranged on the axle center of the top surface of the tray, the tightening mechanism comprises a left hoop and a right hoop, one end of the left hoop and one end of the right hoop are relatively linked together through bolts, and the other end of the left hoop and the right hoop are fixed on the tray, and the other end of the left hoop is provided with a buckle and the like. The working principle is as follows: when the bolt holes are drilled on the hub, the center of the hub is sleeved on the centering column, the tightening mechanism clamps and fixes the hub from two sides, the bolts are inserted into the limiting holes to limit and fix the hub, after the first bolt hole is machined, the bolts are only required to be pulled out, the tray is rotated to be aligned with five equally-divided scale marks, and the drilling position of the second bolt hole can be accurately positioned, so that the hub is circulated until the five bolt holes are machined. But still suffer from the following disadvantages and are analyzed as follows, corresponding to the present application:

(1) The prior art adopts the left hoop and the right hoop of the tightening mechanism to clamp the hub to tightly press the hub left and right, so that the hub cannot be tightly pressed in the up-down direction, and the hub can vibrate up and down when drilling (namely, pre-drilling a round hole and tapping) so as to influence the machining precision (such as low screw pitch precision);

(2) The prior art adopts the bolt to insert into the limiting hole, and only the tray and the chassis can not rotate relatively, but the hub still has the problem that the hub and the tray rotate relatively (without anti-rotation limiting) to cause drilling deviation when the hoop on the tray is clamped.

Disclosure of utility model

The utility model provides a hub drilling tool, which solves the problems that in the prior art, a hub cannot be well compressed in the up-down direction and is not limited by rotation prevention, and the drilling precision and the drilling deviation are reduced.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: the utility model provides a wheel hub drilling processing frock which characterized in that: comprises a workbench, a locating pin, anti-rotation nails, a plurality of elastic support plates and a plurality of corner cylinders; the locating pin is arranged on the workbench and is used for being matched with a central hole of the hub; the elastic support plates are arranged on the workbench, are circumferentially distributed and are used for horizontally supporting the wheel rim of the wheel hub; the rim is arranged on the workbench, circumferentially distributed and used for compressing the hub; the anti-rotation nails are arranged on the workbench and are used for being contacted with the inner wall surface of the rim of the hub and being contacted and matched with spokes of the hub. By adopting the scheme, the rim of the wheel hub is placed on each elastic supporting plate to be horizontally and elastically supported circumferentially during clamping, and the positioning pin is matched with the central hole of the wheel hub to be centrally positioned; then, after the hub rotates, the anti-rotation nails are contacted with the inner wall surface of the rim of the hub and are contacted and matched with spokes of the hub, and at the moment, the hub is limited to rotate and is positioned in the circumferential direction; and then starting each corner cylinder to work so as to realize circumferential compression of the rim of the hub, and completing positioning compression at the moment. It has the following characteristics: firstly, since each elastic supporting plate has a rim for elastically supporting the hub, the elastic supporting plate can keep contact with the rim, and can keep a contact state when the surface of the rim is rough, so that the elastic supporting plate is better stably supported; secondly, as the wheel rim of the wheel hub is pressed by a plurality of positions of the circumference of the corner cylinders at the same time, the wheel rim cannot loosen up and down, and is buffered and damped under the elastic supporting action of each elastic supporting plate, so that the machining precision (such as screw thread pitch precision) is improved; thirdly, because the anti-rotation nail is arranged on the workbench and is used for being contacted with the inner wall surface of the rim of the hub and being contacted and matched with spokes of the hub, the hub is limited to rotate and the circumferential position is accurately positioned, so that the drilling position precision is ensured, and meanwhile, the hub is prevented from rotating loose during drilling.

In summary, the technical scheme is different from the existing tool structural design, and the technical problems that in the prior art, the hub cannot be well compressed in the up-down direction and is not limited in rotation prevention mode, and drilling machining precision and drilling deviation are reduced are solved.

Preferably, the elastic support plate is made of polyurethane material. So that the elastic support plate still has rubber-like elongation and rebound resilience at high hardness; while at the same time its impact strength and flexural strength are much higher than those of plastics at high hardness. The vibration absorber has the advantages of high hardness support requirement, excellent vibration absorption performance, vibration reduction, buffering effect and the like.

Further, the lower end of the anti-rotation nail is fixedly connected with the adjusting plate; the adjusting plate is provided with a first strip-shaped hole; the first strip-shaped hole is connected with the workbench through a first bolt. When the rim size of the hub is changed, the position of the adjusting plate can be adjusted, so that the anti-rotation nails can be contacted with the inner wall surface of the rim of the hub and the spokes thereof all the time. The working position of the anti-rotation nail is adjustable, so that the assembly requirements of hubs with different sizes and models are met, and the universality is good.

Preferably, the workbench is disc-shaped.

Further, a plurality of second strip-shaped holes are formed in the workbench; the elastic support plate and the corner cylinder are connected with the second strip-shaped hole and are adjustable in position. When the wheel rim size of the wheel hub changes, the elastic support plate and the matching position of the corner cylinder on the second strip-shaped hole can be adjusted, so that the elastic support plate can support the wheel rim of the wheel hub, the wheel rim of the wheel hub can be pressed by the corner cylinder, the assembly requirements of the wheel hubs with different sizes and models can be met, and the universality is good.

Further, a first connecting plate is fixed at the lower end of the elastic supporting plate; the first connecting plate is located above the workbench and is fixedly connected with the second strip-shaped hole through a second bolt. During adjustment, the first connecting plate is fixed on the second strip-shaped hole through the position change, so that different positions of the first connecting plate and the elastic supporting plate on the first connecting plate are adjusted.

Further, the corner cylinder is fixed on the second connecting plate; the second connecting plate is connected with the second strip-shaped hole through a third bolt. During adjustment, the second connecting plate is fixed on the second bar-shaped hole through the change of the matching position, so that the second connecting plate and different positions of the upper corner cylinder of the second connecting plate are adjusted.

Further, the second connecting plate is positioned below the workbench; the workbench is provided with a third strip-shaped hole; the output shaft of the corner cylinder is arranged in the third strip-shaped hole in a penetrating way; the pressing plate of the corner cylinder is positioned above the workbench. Thus, when the second connecting plate is adjusted in position, the output shaft of the corner cylinder can normally change along with the position.

Further, the elastic support plate and the corner cylinder each have three.

The utility model has the beneficial effects that:

The first, the utility model adopts a different structure from the existing tool, can be used for positioning and clamping the hub during drilling, can compress the hub in the up-down direction and perform anti-rotation limiting, can improve the drilling precision and prevent drilling deviation;

Secondly, according to the utility model, as each elastic supporting plate has a rim which supports the hub in a certain elasticity, the elastic supporting plate can keep contact with the rim, and can keep a contact state when the surface of the rim is rough, so that the rim is better stably supported; the hardness of the polyurethane of the elastic support plate is lower than that of the polyurethane of the elastic support plate, and the elastic support plate cannot cause friction damage to the hub when the elastic support plate is in clamping contact with the hub;

Thirdly, the wheel rim of the wheel hub is pressed by a plurality of positions of the circumference of the corner cylinders at the same time, so that the wheel rim cannot loosen up and down, and is buffered and damped under the elastic supporting action of each elastic supporting plate, and the drilling machining precision is further improved;

Fourthly, the anti-rotation nails are arranged on the workbench and are used for being contacted with the inner wall surface of the rim of the hub and being contacted and matched with spokes of the hub, so that the hub is limited to rotate and the circumferential position is accurately positioned, the drilling position precision is ensured, and the hub can be prevented from loosening in rotation during machining;

Fifth, the working positions of the anti-rotation nails, the three elastic support plates and the three corner cylinders are adjustable, so that the assembly requirements of hubs with different sizes and models are met, and the universality is good.

Drawings

Fig. 1 is a perspective view of a hub drilling tool according to a first embodiment of the present utility model.

Fig. 2 is a top view of a hub drilling tool in accordance with a first embodiment of the present utility model when positioned and compressed against a hub.

Fig. 3 is a perspective view of a hub drilling tool in accordance with a first embodiment of the present utility model when positioned and compressed against a hub.

Fig. 4 is a perspective view of a hub drilling tool according to a second embodiment of the present utility model.

Fig. 5 is a perspective view of a hub drilling tool in the second embodiment of the utility model when the anti-rotation nail, one of the elastic support plates and the corner cylinder are detached.

Fig. 6 is a top view of a hub drilling tool in accordance with a second embodiment of the present utility model when positioning and compressing a hub.

Fig. 7 is a perspective view of a hub drilling tool in accordance with a second embodiment of the present utility model when positioning and compressing a hub.

Detailed Description

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

Embodiment one: referring to fig. 1-3, a hub drilling tool comprises a workbench 1, a locating pin 2, anti-rotation nails 3, three elastic support plates 4 and three corner cylinders 5.

In this embodiment, the table 1 has a disk shape. While in other embodiments the table 1 may be rectangular or the like rather than being limited to a disk shape.

Specifically, the elastic support plate 4 is made of polyurethane material. This allows the elastic support plate 4 to have rubber-like elongation and rebound resilience at high hardness; while at the same time its impact strength and flexural strength are much higher than those of plastics at high hardness. The vibration absorber has the advantages of high hardness support requirement, excellent vibration absorption performance, vibration reduction, buffering effect and the like. In addition, the elastic support plate 4 (the polyurethane hardness is lower than that of the hub material) does not cause friction damage to the hub when the elastic support plate 4 is in clamping contact with the hub N.

In particular, the corner cylinder 5 may be of pneumatic type (i.e., corner cylinder) and of oil pressure type. The working process of the corner cylinder comprises the following steps: the rotation angle (e.g., 90 degrees) is first completed, and then the platen is pressed down to complete clamping of the workpiece. The corner cylinder 5 is available in the prior art or directly commercially available and is not described in detail.

Specifically, the positioning pin 2 is fixed on the center of the table 1 and is used for matching with the central hole N-1 of the hub N. Specifically, the outer diameter of the locating pin 2 is matched with the inner diameter of the central hole N-1 of the hub N. The locating pin 2 is inserted into the central hole N-1 of the hub N during assembly.

Specifically, each of the elastic support plates 4 is fixed to the table 1 and is uniformly distributed in the circumferential direction and is used for horizontally supporting the rim N-2 of the hub N.

Specifically, each of the corner cylinders 5 is fixed to the table 1 and is uniformly distributed in the circumferential direction and is used for pressing the rim N-2 of the hub N.

Specifically, the anti-rotation nails 3 are arranged on the workbench 1 and are used for simultaneously contacting and matching with the inner wall surface of the rim N-2 of the hub N and the spokes N-3 thereof.

In the embodiment, the lower end of the anti-rotation nail 3 is fixedly connected with the adjusting plate 3-1; the adjusting plate 3-1 is provided with a first strip-shaped hole 3-11; the first strip-shaped hole 3-11 is fixedly connected with the workbench 1 through a first bolt 3-2, and the relative position of the adjusting plate 3-1 and the center of the workbench 1 is adjustable and can be fixed.

Specifically, the workbench 1 is provided with a first threaded hole 1-3, and the screw of the first bolt 3-2 passes through the first strip-shaped hole 3-11 and then is in threaded fit with the first threaded hole 1-3 to be fixedly connected (refer to fig. 4). The position of the first bar-shaped hole 3-11, which is engaged with the first bolt 3-2, can be adjusted along the length direction thereof, so that the distance between the adjusting plate 3-1 and the positioning pin 2 can be adjusted. Therefore, when the size of the rim N-2 of the hub is changed, the position of the adjusting plate 3-1 can be adjusted, so that the anti-rotation nails 3 can always meet the contact and fit with the inner wall surface of the rim N-2 of the hub N and the spokes N-3 thereof.

And because the working position of the anti-rotation nail 3 is adjustable, the assembly requirements of hubs with different sizes and models are further met, and the universality is good.

Referring to fig. 2-3, in this embodiment, the rim N-2 of the hub N is placed on each of the elastic support plates 4 to be horizontally elastically supported circumferentially during clamping, and the positioning pin 2 is engaged with the central hole N-1 of the hub N to be centrally positioned; then, after the hub N rotates, the anti-rotation nails 3 are contacted with the inner wall surface of the rim N-2 of the hub N and are contacted and matched with the spokes N-3 of the hub N, and at the moment, the hub N is limited to rotate and is positioned circumferentially; and then starting each corner cylinder 5 to work so as to realize circumferential compression of the rim N-2 of the hub N, and completing positioning compression.

The embodiment has the following characteristics: first, since each of the elastic support plates 4 has a certain elasticity to support the rim N-2 of the hub N, the elastic support plate 4 can be kept in contact with the rim N-2, and can be kept in contact state to be better stably supported even when the surface of the rim N-2 is rough; secondly, as the wheel rim N-2 of the wheel hub N is compressed by a plurality of corner cylinders 5 at a plurality of positions in the circumferential direction, the wheel rim N-2 cannot loosen up and down, and is buffered and damped under the elastic supporting action of each elastic supporting plate 4, so that the machining precision such as the screw pitch precision is improved; thirdly, owing to prevent changeing nail 3 setting is in on the workstation 1 and be used for simultaneously with the contact of wheel rim N-2 internal face of wheel hub N and its spoke N-3 contact cooperation, this wheel hub N is restricted rotation and circumference position accurate positioning, has both guaranteed drilling processing position precision, can prevent that wheel hub N from rotating when processing and becoming flexible, fourth, owing to prevent changeing nail 3's working position is adjustable, and then satisfies the assembly requirement of different sizes and model wheel hubs (such as diameter is at 14-22 inches scope), the commonality is good. Therefore, the embodiment solves the problems that in the prior art, the hub cannot be well compressed in the up-down direction and is not limited in rotation prevention, and the drilling machining precision and the drilling deviation are reduced.

Embodiment two: this embodiment is substantially the same as embodiment one, except that:

Referring to fig. 4-7, in this embodiment, three groups of second bar-shaped holes 1-1 are uniformly distributed on the workbench 1 along the circumferential direction. Specifically, the three elastic support plates 4 and the three corner cylinders 5 are respectively connected with the three groups of second strip-shaped holes 1-1, and the positions of the three elastic support plates and the three corner cylinders are adjustable. When the size of the rim N-2 of the hub is changed, the matching positions of the elastic support plate 4 and the corner cylinder 5 on the second strip-shaped hole 1-1 can be adjusted, so that the elastic support plate 4 can support the rim N-2 of the hub N, and meanwhile, the requirement that the corner cylinder 5 can press the rim N-2 of the hub N is met, and then the assembly requirements of hubs with different sizes and types (such as diameters in the range of 14-22 inches) are met, and the universality is good.

Specifically, the length direction of each group of the second strip-shaped holes 1-1 is along the radial direction of the positioning pin 2 on the workbench 1.

In this embodiment, as can be seen in fig. 5, the lower end of the elastic support plate 4 is fixed with a first connecting plate 4-1; the first connecting plate 4-1 is located above the workbench 1, and the first connecting plate 4-1 is fixedly connected with the second strip-shaped hole 1-1 through the second bolt 4-2. Specifically, the first connecting plate 4-1 is provided with a second threaded hole 4-11, and the second bolt 4-2 is fixedly connected with the second threaded hole 4-11 of the first connecting plate 4-1 in a matched manner after passing through the second bar-shaped hole 1-1 upwards. During adjustment, the first connecting plate 4-1 is fixed on the second strip-shaped hole 1-1 through the position change, so that the adjustment of different positions of the first connecting plate 4-1 and the elastic support plate 4 on the first connecting plate is realized.

Wherein, referring to fig. 5, the corner cylinder 5 is fixedly installed on the second connecting plate 5-1; the second connecting plate 5-1 is fixedly connected with the second strip-shaped hole 1-1 through a third bolt 5-2. Wherein the second connecting plate 5-1 is positioned below the workbench 1; three third strip-shaped holes 1-2 are formed in the workbench 1; the output shaft 51 of the corner cylinder 5 is inserted into the third bar-shaped hole 1-2. And the third strip-shaped holes 1-2 are parallel to each other with respect to the second strip-shaped holes 1-1 of the corresponding group. The pressing plate 52 of the corner cylinder 5 is located above the table 1. Specifically, a third threaded hole 5-11 is formed in the second connecting plate 5-1, and the third bolt 5-2 is fixedly connected with the third threaded hole 5-11 in a matched manner after penetrating through the second strip-shaped hole 1-1 downwards. During adjustment, the second connecting plate 5-1 is fixed on the second bar-shaped hole 1-1 through the change of the matching position of the second connecting plate 5-1, so that different positions of the second connecting plate 5-1 and the upper corner cylinder 5 of the second connecting plate are adjusted. When the position of the second connecting plate 5-1 is adjusted, the output shaft 51 of the angle cylinder 5 can slide normally in the third bar-shaped hole 1-2 along with the position change.

Specifically, the length direction of each third bar-shaped hole 1-2 is along the radial direction of the positioning pin 2 on the workbench 1.

In particular, referring to fig. 5, each set of second strip-shaped holes 1-1 comprises two second strip-shaped holes 1-1 parallel to each other. And the first connecting plate 4-1 is respectively connected with the two second strip-shaped holes 1-1 of the same group through two second bolts 4-2. The second connecting plates 5-1 are respectively connected with the second strip-shaped holes 1-1 in the same group through two third bolts 5-2. Because the double bolts are adopted for fixation, the corner cylinder 5 and the elastic support plate 4 are fixed more firmly and reliably after being positioned, and can not rotate and loosen.

In this embodiment, referring to fig. 4, after the hub is positioned and clamped on the fixture, the multi-axis device (e.g. 5 rotating shafts) can be used for drilling, so that all the fixing holes (e.g. 5 fixing holes) on the hub can be simultaneously processed at one time, the production efficiency can be improved in multiple, and meanwhile, the relative position precision between the fixing holes is ensured.

The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims (9)

1. The utility model provides a wheel hub drilling processing frock which characterized in that: comprises a workbench (1), a locating pin (2), anti-rotation nails (3), a plurality of elastic support plates (4) and a plurality of corner cylinders (5);

the locating pin (2) is arranged on the workbench (1) and is used for being matched with a central hole (N-1) of the hub (N);

The elastic support plates (4) are arranged on the workbench (1) and are circumferentially distributed and used for horizontally supporting a wheel rim (N-2) of the wheel hub (N);

The rim (N-2) is arranged on the workbench (1), circumferentially distributed and used for pressing the hub (N) on each corner cylinder (5);

the anti-rotation nails (3) are arranged on the workbench (1) and are used for being in contact fit with the inner wall surface of the rim (N-2) of the hub (N) and the spokes (N-3) at the same time.

2. The hub drilling tooling of claim 1, wherein: the elastic supporting plate (4) is made of polyurethane materials.

3. The hub drilling tooling of claim 1, wherein: the lower end of the anti-rotation nail (3) is fixedly connected with the adjusting plate (3-1); the adjusting plate (3-1) is provided with a first strip-shaped hole (3-11); the first strip-shaped hole (3-11) is fixedly connected with the workbench (1) through a first bolt (3-2).

4. The hub drilling tooling of claim 1, wherein: the workbench (1) is disc-shaped.

5. The hub drilling tooling of claim 1, wherein: a plurality of second strip-shaped holes (1-1) are formed in the workbench (1); the elastic support plate (4) and the corner cylinder (5) are connected with the second strip-shaped hole (1-1) and are adjustable in position.

6. The hub drilling tooling of claim 5, wherein: the lower end of the elastic supporting plate (4) is fixed with a first connecting plate (4-1); the first connecting plate (4-1) is located above the workbench (1), and the first connecting plate (4-1) is fixedly connected with the second strip-shaped hole (1-1) through the second bolt (4-2).

7. The hub drilling tooling of claim 5, wherein: the corner cylinder (5) is fixed on the second connecting plate (5-1); the second connecting plate (5-1) is fixedly connected with the second strip-shaped hole (1-1) through a third bolt (5-2).

8. The hub drilling tooling of claim 7, wherein: the second connecting plate (5-1) is positioned below the workbench (1); a third strip-shaped hole (1-2) is formed in the workbench (1); an output shaft (51) of the corner cylinder (5) is arranged in the third strip-shaped hole (1-2) in a penetrating way; the pressing plate (52) of the corner cylinder (5) is positioned above the workbench (1).

9. The hub drilling tooling of claim 1, wherein: the elastic support plate (4) and the corner cylinder (5) are three.