CN209738330U - Cam connecting mechanism and press machine - Google Patents

Abstract

The utility model discloses a cam coupling mechanism, including main shaft, cam, the coaxial wheel hub that is provided with of cam surface, the coaxial cover of wheel hub surface is equipped with hollow axle sleeve, hollow axle sleeve surface includes first conical surface and second conical surface, the coaxial cover of hollow axle sleeve surface is equipped with first dish and the dish that expands of second, first dish internal surface that expands is provided with the third conical surface with first conical surface sliding fit, the dish internal surface that expands of second is provided with the fourth conical surface with second conical surface sliding fit, first dish that expands with connect through locking mechanism between the dish that expands of second, locking mechanism is used for bloated tight hollow axle sleeve and makes the main shaft is embraced to the cam. The cam can be firmly fixed on the main shaft by the arrangement.

Description

Cam connecting mechanism and press machine

Technical Field

The utility model relates to a cam coupling mechanism and press belongs to press punching press autoloading technical field.

Background

Stamping is most widely used in metal forming, and different dies can be used for forming processes such as punching, bending, stretching and the like.

The cam type multi-station press has high precision requirement, the total clearance of a machine tool is small, high-precision connection of all connection links is required, and the mechanism is mainly used for transmitting torque between a main shaft and a cam of the high-speed and high-precision cam type multi-station press.

The traditional way of transmitting torque between the main shaft and the cam has two forms: one is the form of flat key torque transmission (as shown in fig. 1): and the second mode is a mode of expanding the connecting sleeve to transmit torque (as shown in figure 2).

The disadvantages of using a flat key to transmit torque are as follows: when transmitting torque, the two cams are required to transmit torque synchronously. The requirement is higher when the key groove is machined, the key groove on the main shaft is ensured to require the same straight line tolerance of 0.01mm, and the key grooves of the two cams are required to ensure the high-precision machining requirement, so that the machining difficulty and the cost are increased. When the machine tool is installed, if the condition of asynchronism occurs, the key groove cannot be adjusted to meet the requirement, so that the precision of the whole machine tool is poor, and the requirement of the product cannot be met.

The disadvantages of using the expansion connecting sleeve to transmit torque are as follows: the requirement for a large opening of the cam can lead to a thin thickness on one side and difficult arrangement of the cam for the machine tool with the compact structure. When the installation is bloated tight, because the unilateral atress is great when bloated tight on one side of cam leads to, makes the thin one side local deformation of cam great, has increased the radial error of two cam profile curves, leads to the slider at the relatively poor precision of bottom dead center punching press, influences work piece quality and mould life.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low, simple to operate, firm in connection's cam coupling mechanism of processing cost and adopt this cam coupling mechanism's press.

In order to achieve the above object, the utility model relates to a cam connecting mechanism, including main shaft, cam, its characterized in that: the coaxial wheel hub that is provided with of cam surface, the coaxial cover of wheel hub surface is equipped with hollow axle sleeve, hollow axle sleeve surface includes first conical surface and second conical surface, the coaxial cover of hollow axle sleeve surface is equipped with first dish and the second dish that expands, first dish internal surface that expands is provided with first conical surface sliding fit's third conical surface, the second expands to coil the internal surface and is provided with the fourth conical surface with second conical surface sliding fit, first dish that expands with the second expands to coil between be connected through locking mechanism, locking mechanism is used for bloated tight hollow axle sleeve and makes the main shaft is embraced to the cam.

As the utility model discloses further modified technical scheme, locking mechanism includes the screw, the screw is in first dish and the dish that expands of second expand respectively the spiro union.

As the utility model discloses further modified technical scheme, the cam is clearance fit or transition fit with the main shaft.

As a further improved technical scheme of the utility model, the wheel hub external diameter is less than the cam external diameter.

As a further improved technical scheme of the utility model, the wheel hub wall thickness is less than or equal to 6 mm.

The utility model also provides a press, this press has adopted this cam coupling mechanism to set firmly the cam in the main shaft.

The utility model discloses following technological effect has:

(1) The processing cost is low, and the cam can be fixedly arranged on the main shaft without damaging the main shaft and the cam surface.

(2) Simple to operate can adjust first dish and the second that expands in a flexible way during the assembly and coil the position, conveniently adjusts the position relation of a plurality of cams on the main shaft to reach the synchronous requirement of two cams, guarantee the press bottom dead center precision.

(3) The hollow shaft sleeve is independently contracted, and the expansion cannot cause the cam to deform.

Drawings

FIG. 1 is a schematic diagram of a prior art flat key torque transfer configuration of FIG. 1.

Fig. 2 is a schematic diagram of a structure of a prior art 2 expansion connecting sleeve for transmitting torque.

Fig. 3 is a schematic view of the structure of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and embodiments.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following embodiments will be briefly described, and it is obvious that the following embodiments are some embodiments of the present invention, and for those skilled in the art, other embodiments can be obtained according to the embodiments without creative efforts, and it is necessary to explain that: the terms "connect", "mount", "fix" and the like in the following description may refer to a direct connection, a mount, and a fixation, or an indirect connection, a mount, and a fixation, without specific description, that is, allowing a third party to intervene.

Referring to fig. 3, the utility model discloses a cam connection mechanism, this cam connection mechanism includes main shaft 3, cam 4, and this connection mechanism can realize setting firmly cam 4 on main shaft 3 in main shaft 3, does not destroy main shaft 3 and cam 4 surface simultaneously, has guaranteed main shaft 3 and cam 4 intensity, avoids cam 4 to take place to warp.

in the embodiment, a hub 5 is coaxially arranged on the outer surface of a cam 4, the hub 5 can be integrally formed with the cam 4 or separately formed with the cam through hub and cam, the cam 4 and the hub 5 are both sleeved on a main shaft 3 and are in clearance fit or transition fit with the main shaft 3, a hollow shaft sleeve 2 is coaxially sleeved on the outer surface of the hub 5, the hollow shaft sleeve 2 is in clearance fit or transition fit with the main shaft 3, the outer surface of the hollow shaft sleeve 2 comprises a first conical surface 21 and a second conical surface 22, a first expansion disc 1 and a second expansion disc 6 are coaxially sleeved on the outer surface of the hollow shaft sleeve 2, a third conical surface 11 in sliding fit with the first conical surface 21 is arranged on the inner surface of the first expansion disc 1, a fourth conical surface 61 in sliding fit with the second conical surface 22 is arranged on the inner surface of the second expansion disc 6, and the first expansion disc 1 and the second expansion disc 6 are connected through a locking mechanism, the locking mechanism is used for expanding the hollow shaft sleeve 2 and enabling the cam 4 to tightly hold the main shaft 3, so that the cam 4 can be synchronously driven to synchronously rotate when the main shaft 3 rotates.

Further, the locking mechanism comprises a screw 7, the screw 7 is respectively screwed on the first expansion disc 1 and the second expansion disc 6, and the first expansion disc 1 and the second expansion disc 6 can be driven to be relatively close to or relatively far away from each other along the hollow shaft sleeve 2 synchronously through the adjusting screw 7, so that the pressing force between the cam 4 and the main shaft 3 can be adjusted.

Furthermore, the outer diameter of the hub 5 is smaller than that of the cam 4, and the wall thickness of the hub 5 is less than or equal to 6mm, so that the pressing force between the cam 4 and the spindle 3 can be better adjusted.

The utility model also provides a press, this press include foretell cam coupling mechanism, set firmly a plurality of cams 4 on the main shaft 3, through adjusting screw 7, can be very convenient adjust the relative position relation between the same epaxial a plurality of cams, can ensure the synchronous requirement of a plurality of cams 4, guarantee the press bottom dead center precision.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (6)

1. The utility model provides a cam coupling mechanism, includes main shaft, cam, its characterized in that: the coaxial wheel hub that is provided with of cam surface, the coaxial cover of wheel hub surface is equipped with hollow axle sleeve, hollow axle sleeve surface includes first conical surface and second conical surface, the coaxial cover of hollow axle sleeve surface is equipped with first dish and the second dish that expands, first dish internal surface that expands is provided with first conical surface sliding fit's third conical surface, the second expands to coil the internal surface and is provided with the fourth conical surface with second conical surface sliding fit, first dish that expands with the second expands to coil between be connected through locking mechanism, locking mechanism is used for bloated tight hollow axle sleeve and makes the main shaft is embraced to the cam.

2. The cam connection mechanism of claim 1, wherein: the locking mechanism comprises a screw, and the screw is connected to the first expansion disc and the second expansion disc in a threaded mode respectively.

3. The cam connection mechanism of claim 1, wherein: the cam and the main shaft are in clearance fit or transition fit.

4. The cam connection mechanism of claim 1, wherein: the outer diameter of the hub is smaller than that of the cam.

5. The cam connection mechanism of claim 4, wherein: the wall thickness of the hub is less than or equal to 6 mm.

6. A press machine characterized by: comprising a cam connection according to any of claims 1-5.