CN102241151A - Screw press - Google Patents

Abstract

The invention provides a screw press, which includes an upper beam, a lower beam, a nut, a brake, a screw, a slider, a transmission mechanism, a motor and a column vertically connected between the upper beam and the lower beam, wherein the nut is fixed on the upper beam And threaded with the screw, the bottom of the screw is provided with a slider, and the motor is connected to the screw through a transmission mechanism. It is characterized in that: a supporting mechanism is added on the upper beam, and the transmission mechanism includes a small pulley, a large pulley, a belt, and a spline connection. The inner sleeve and the outer sleeve, the outer wall of the inner sleeve and the inner wall of the outer sleeve are evenly distributed with outwardly convex straight teeth of the same shape and number, the inner sleeve is set on the upper end of the screw rod through the key, the motor is installed on the upper beam, and the output of the motor The end is fixedly connected with the small pulley, the large pulley is connected to the outer cover through a key, and the lower end of the outer cover is installed on the supporting mechanism through a bearing. Since the line contact between the inner sleeve and the outer sleeve is realized through the convex straight teeth, the friction force is small, the service life is long, and the working performance is excellent.

Description

Screw press

technical field

The invention provides a screw press, which belongs to the technical field of mechanical industrial equipment.

Background technique

Most of the existing screw presses are friction presses. The main problem is that relying on manpower or pneumatically moving the horizontal axis to control the friction plate to transmit power, the friction loss is large, the energy consumption is large, the striking force is not controlled accurately, and the qualified rate of the parts is low. High labor intensity and large amount of maintenance. The friction press is transformed into a motor-driven screw press, which has the advantages of energy saving, numerical control, and high product quality. The patent No. is 200620081609.7 for the CNC slider device, which shows that the movement of the slider can be controlled by the motor through the spline transmission, but the existing spline has a large contact area and a large friction force, resulting in high energy consumption of the equipment. Equipment reliability is poor.

Contents of the invention

The object of the present invention is to provide a screw press which can overcome the above-mentioned defects, has low friction, low energy consumption and long equipment life. Its technical solution is:

A screw press, comprising an upper beam, a lower beam, a nut, a brake, a screw, a slider, a transmission mechanism, a motor and a column vertically connected between the upper beam and the lower beam, wherein the nut is fixed on the upper beam and connected with the screw Threaded connection, the bottom of the screw rod is provided with a slider, and the motor is connected to the screw rod through a transmission mechanism. The outer wall of the inner sleeve and the inner wall of the outer sleeve are evenly distributed with convex straight teeth of the same shape and number. The inner sleeve is set on the upper end of the screw rod through a key, and the motor is installed on the upper beam. The output end of the motor is connected to the small The pulley is fixedly connected, the large pulley is connected to the outer cover through a key, and the lower end of the outer cover is installed on the supporting mechanism through a bearing.

In the screw press described above, the brake is installed on the upper beam through a bracket, and the holding block of the brake is wrapped around the large pulley.

In the screw press, a pressure plate is provided on the inner sleeve and the top of the screw rod, and the pressure plate is fixedly connected with the screw rod.

In the screw press, the support mechanism includes a connecting plate, a base and a cover plate, wherein the connecting plate is fitted on the screw and fixedly mounted on the upper beam through fastening nuts, and the base is fitted on the screw and fixedly mounted on the On the connecting plate, the base and the screw are coaxial, the lower end of the jacket is installed on the base through bearings, the top of the base is fixed with a cover plate, and the bearing is packaged in the cavity formed by the cover plate, the base and the jacket.

In the screw press, the tooth profile of the convex straight teeth is an involute or an arc line, and the convex straight teeth on the inner sleeve and the outer sleeve mesh with each other to form a linear contact sliding fit; the motor adopts a switched reluctance motor.

Its working principle is: the output shaft of the motor drives the outer casing supported on the supporting mechanism to rotate through the small pulley and the large pulley. The auxiliary transmission makes the screw and the inner sleeve do spiral motion, and then drives the slider to do linear motion up and down.

Compared with the prior art, the present invention has the advantages of:

1. Since the transmission mechanism adopts the inner sleeve and the outer sleeve connected by splines, and the outer wall of the inner sleeve and the inner wall of the outer sleeve are evenly distributed with outwardly convex straight teeth of the same shape and number, so the inner sleeve and the outer sleeve are straightened through the outer convex. The teeth realize the line contact between the two, the friction force is small, the friction loss is reduced, and the service life of the equipment is prolonged.

2. The motor drives the casing to rotate through the belt transmission structure, the torque increases and the speed decreases, which can effectively adjust the running speed of the slider.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is an A-A sectional view of the inner sleeve, the outer sleeve and the screw rod in the embodiment shown in Fig. 1 .

Among the figure: 1, upper beam 2, lower beam 3, nut 4, brake 5, screw rod 6, slide block 7, motor 8, column 9, small pulley 10, large pulley 11, belt 12, inner sleeve 13, overcoat 14. Outward convex straight tooth 15, key 16, bearing 17, bracket 18, pressure plate 19, connecting plate 20, base 21, cover plate 22, fastening nut

Detailed ways

In the embodiment shown in Figure 1-2: the column 8 is vertically connected between the upper beam 1 and the lower beam 2, the nut 3 is fixed on the upper beam 1 and screwed with the screw 5, and the bottom of the screw 5 is provided with a slider 6. The transmission mechanism includes a small pulley 9, a large pulley 10, a belt, an inner sleeve 12 and an overcoat 13 connected by splines, wherein the outer wall of the inner sleeve 12 and the inner wall of the overcoat 13 are evenly distributed with identical shapes and numbers. The outer convex straight teeth 14, the tooth profile of the outer convex straight teeth 14 is involute, the outer convex straight teeth 14 on the inner sleeve 12 and the outer sleeve 13 mesh with each other to form a linear contact sliding fit; the inner sleeve 12 is set on the screw rod 5 through the key 15 The upper end of the inner sleeve 12 and the top of the screw rod 5 are provided with a pressure plate 18, the pressure plate 18 is fixedly connected with the screw rod 5, the motor 7 adopts a switched reluctance motor, and is installed on the upper beam 1, and the output end of the motor 7 is fixed to the small pulley 9 connection, the large pulley 10 is connected to the outer casing 13 through the key 15, and the lower end of the outer casing 13 is installed on the support mechanism through the bearing 16; , and fixedly installed on the upper beam 1 through the fastening nut 22, the base 20 is set on the screw rod 5 in a gap, and fixedly installed on the connecting plate 19, the base 20 is coaxial with the screw rod 5, and the lower end of the outer cover 13 is installed through the bearing 16 On the base 20, the top of the base 20 is fixed with a cover plate 21, and the bearing 16 is encapsulated in the cavity formed by the cover plate 21, the base 20 and the outer jacket 13; The block is wrapped around the large pulley 10. When braking, hold the big belt pulley 10 tightly by the block.

Claims (6)

1. A screw press, comprising an upper beam (1), a lower beam (2), a nut (3), a brake (4), a screw (5), a slide block (6), a transmission mechanism, a motor (7) and Vertically connected to the column (8) between the upper beam (1) and the lower beam (2), wherein the nut (3) is fixed on the upper beam (1) and threaded with the screw rod (5), the bottom of the screw rod (5) A slide block (6) is provided, and the motor (7) is connected to the screw rod (5) through a transmission mechanism. It is characterized in that: a support mechanism is added on the upper beam (1), and the transmission mechanism includes a small pulley (9), a large pulley ( 10), belts, inner sleeves (12) and outer sleeves (13) connected by splines, wherein the outer wall of the inner sleeve (12) and the inner wall of the outer sleeve (13) are evenly distributed with outwardly protruding straight teeth of exactly the same shape and number (14), the inner sleeve (12) is set on the upper end of the screw rod (5) through the key (15), the motor (7) is installed on the upper beam (1), and the output end of the motor (7) is connected to the small pulley (9) Fixedly connected, big pulley (10) connects overcoat (13) through key (15), and the lower end of overcoat (13) is installed on the supporting mechanism through bearing (16). 2. The screw press according to claim 1, characterized in that: the brake (4) is installed on the upper beam (1) through the bracket (17), and the holding block of the brake (4) is wrapped around the large pulley (10 )superior. 3. The screw press according to claim 1, characterized in that: a pressure plate (18) is provided on the top of the inner sleeve (12) and the screw (5), and the pressure plate (18) is fixedly connected with the screw (5). 4. The screw press according to claim 1, characterized in that: the support mechanism includes a connecting plate (19), a base (20) and a cover plate (21), wherein the connecting plate (19) is fitted on the screw (5) and fixedly installed on the upper beam (1) through the fastening nut (22), the base (20) is set on the screw rod (5) and fixedly installed on the connecting plate (19), the base (20) and the screw rod (5) concentric, the lower end of the overcoat (13) is installed on the base (20) through the bearing (16), the top of the base (20) is fixed with a cover plate (21), and the bearing (16) is encapsulated in the cover plate (21 ), the base (20) and the cavity formed by the overcoat (13). 5. The screw press according to claim 1, characterized in that: the tooth profile of the convex straight teeth (14) is an involute or an arc line, and the inner sleeve (12) and the outer sleeve (13) are The protruding straight teeth (14) mesh with each other to form a line contact sliding fit. 6. The screw press according to claim 1, characterized in that the motor (7) is a switched reluctance motor.

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