Screw pre-tightening machine

Abstract

The utility model relates to the technical field of screw tightening machines, in particular to a screw pre-tightening machine which comprises a top plate and a base, four corners of the top plate and four corners of the base are fixedly connected through supporting rods, an electric push rod is fixedly arranged at the bottom of the top plate, the output end of the electric push rod is fixedly connected with a circular seat, and a circular groove is formed in the bottom of the circular seat. A disc is arranged at the bottom of the circular base, a plurality of motors which are evenly distributed are fixedly arranged at the upper end of the circular base, the output ends of the motors penetrate into the circular groove, circular holes are formed in the positions, corresponding to the output shafts of the motors, of the upper end of the disc, tightening shafts are rotationally arranged in the circular holes through rolling bearings, and the upper ends and the lower ends of the tightening shafts extend out of the circular holes. A rectangular block is fixedly arranged at the upper end of the tightening shaft, a rectangular groove matched with the rectangular block is formed in the tail end of an output shaft of the motor, and strip-shaped holes are formed in the two sides of the bottom of the disc. A plurality of tightening shafts can be quickly replaced according to needs, time and labor are saved, and working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screw tightening machines, in particular to a screw pre-tightening machine. Background Art

[0002] Automatic screw feeding machine, also known as automatic screw locking machine, automatic screw locking machine, industrial tightening system, etc., is an automated device that uses automated mechanisms instead of manual labor to complete the taking, placing, and tightening of screws. With slight changes, it can also be used for the automatic assembly of small column parts. It has been widely used abroad, and many domestic enterprises have broad application prospects.

[0003] In the prior art, when pre-tightening the screws of the pump cover, the screws used in the pump cover are of different sizes. Therefore, when tightening screws of different sizes, multiple tightening shafts need to be replaced, and the replacement efficiency is low. Therefore, we have introduced a screw pre-tightening machine. Utility Model Content

[0004] The purpose of the utility model is to provide a screw pre-tightening machine, which can quickly replace multiple tightening shafts as needed, saving time and labor, improving work efficiency, and solving the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A screw pre-tightening machine comprises a top plate and a base, wherein the top plate and the base are fixedly connected at their four corners by support rods, an electric push rod is fixedly arranged at the bottom of the top plate, an output end of the electric push rod is fixedly connected to a circular seat, a circular groove is provided at the bottom of the circular seat, a circular disc is provided at the bottom of the circular seat, a plurality of evenly distributed motors are fixedly arranged at the upper end of the circular seat, the output ends of the motors penetrate into the circular groove, circular holes are provided at the upper ends of the discs corresponding to the output shaft positions of the plurality of motors, a tightening shaft is rotatably arranged in the circular hole through a rolling bearing, the upper and lower ends of the tightening shaft both extend to the outside of the circular hole, and a rectangular block is fixedly arranged at the upper end of the tightening shaft The end of the output shaft of the motor is provided with a rectangular groove matching the rectangular block, and strip holes are provided on both sides of the bottom of the disc, and strip grooves matching the strip holes are provided on both sides of the bottom of the circular seat. A locking mechanism is provided between the strip hole and the strip groove, and the locking mechanism includes a sliding rod, which is horizontally fixed in the strip hole, and a rectangular rod is slidably provided on the side of the rod wall of the sliding rod away from the tightening shaft, and the upper end of the rectangular rod extends into the strip groove, and a locking block is fixedly provided on the groove wall on the side of the strip groove away from the tightening shaft, and a locking groove matching the locking block is provided on the rod wall of the rectangular rod, and a spring is provided on the movable sleeve on the side of the rod wall of the sliding rod close to the tightening shaft.

[0007] Preferably, a limiting ring is slidably provided inside the circular groove, and the lower end of the limiting ring is fixedly connected to the upper end of the disc.

[0008] Preferably, a slope is provided on the lower side of the locking block.

[0009] Preferably, the angle of the inclined surface is set to 45°.

[0010] Preferably, the spring is always in a compressed state.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The screw pre-tightening machine uses a sliding rod, a rectangular rod, a locking block, a spring, a disc and a circular seat to push two rectangular rods at the same time. The rectangular rod squeezes the spring and drives the locking block to move to the outside of the locking groove. At this time, the disc can be removed from the circular seat. When the disc is removed from the circular groove, the rectangular blocks on multiple tightening shafts are also moved to the outside of the corresponding rectangular grooves. Then, the discs with tightening shafts of different sizes are replaced, and multiple tightening shafts can be quickly replaced according to needs, which saves time and effort and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a structural schematic diagram of a screw pre-tightening machine.

[0014] Figure 2 for Figure 1 Schematic diagram of the locking mechanism.

[0015] Figure 3 for Figure 2 An enlarged schematic diagram of the local part A in the figure.

[0016] In the figure: 1. base; 2. disc; 3. round seat; 4. electric push rod; 5. top plate; 6. motor; 7. rectangular block; 8. tightening shaft; 9. limit ring; 10. locking block; 11. sliding rod; 12. rectangular rod; 13. spring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figures 1 to 3 , the utility model provides a technical solution:

[0019] A screw pre-tightening machine comprises a top plate 5 and a base 1, the top plate 5 and the four corners of the base 1 are fixedly connected by support rods, an electric push rod 4 is fixedly arranged at the bottom of the top plate 5, the output end of the electric push rod 4 is fixedly connected to a circular seat 3, a circular groove is opened at the bottom of the circular seat 3, a circular disc 2 is arranged at the bottom of the circular seat 3, a plurality of evenly distributed motors 6 are fixedly arranged at the upper end of the circular seat 3, the output ends of the motors 6 penetrate into the circular groove, circular holes are opened at the upper ends of the circular disc 2 corresponding to the positions of the output shafts of the plurality of motors 6, a tightening shaft 8 is rotatably arranged in the circular hole through a rolling bearing, the upper and lower ends of the tightening shaft 8 extend to the outside of the circular hole, a rectangular block 7 is fixedly arranged at the upper end of the tightening shaft 8, a rectangular groove matching with the rectangular block 7 is opened at the end of the output shaft of the motor 6, strip holes are opened on both sides of the bottom of the circular disc 2, strip grooves matching with the strip holes are opened on both sides of the bottom of the circular seat 3, and a locking mechanism is arranged between the strip holes and the strip grooves.

[0020] The locking mechanism includes a slide rod 11, which is horizontally fixed in the strip hole. A rectangular rod 12 is slidably provided on the side of the rod wall of the slide rod 11 away from the tightening shaft 8. The upper end of the rectangular rod 12 extends into the strip groove. A locking block 10 is fixedly provided on the groove wall on the side of the strip groove away from the tightening shaft 8. A locking groove matching the locking block 10 is opened on the rod wall of the rectangular rod 12. A spring 13 is movablely provided on the side of the rod wall of the slide rod 11 close to the tightening shaft 8, and the spring 13 is always in a compressed state.

[0021] The lower side of the locking block 10 is provided with an inclined surface, the angle of which is set to 45°, so that the locking block 10 can be easily inserted into the locking groove.

[0022] A limiting ring 9 is slidably disposed inside the circular groove, and the lower end of the limiting ring 9 is fixedly connected to the upper end of the disc 2 .

[0023] When replacing, push the two rectangular rods 12 at the same time. The rectangular rods 12 squeeze the spring 13 and drive the locking block 10 to move to the outside of the locking groove. At this time, the disc 2 can be removed from the circular seat 3. When the disc 2 is removed from the circular groove, the rectangular blocks 7 on the multiple tightening shafts 8 are also moved to the outside of the corresponding rectangular grooves. Then, replace the disc 2 with tightening shafts 8 of different sizes. Multiple tightening shafts 8 can be quickly replaced as needed, which saves time and effort and improves work efficiency.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screw pre-tightening machine, comprising a top plate (5) and a base (1), wherein the top plate (5) and the base (1) are fixedly connected at four corners by support rods, characterized in that: An electric push rod (4) is fixedly provided at the bottom of the top plate (5), and the output end of the electric push rod (4) is fixedly connected to a circular seat (3), and a circular groove is provided at the bottom of the circular seat (3). A circular disc (2) is provided at the bottom of the circular seat (3), and a plurality of evenly distributed motors (6) are fixedly provided at the upper end of the circular seat (3), and the output ends of the motors (6) penetrate into the circular groove. Circular holes are provided at the upper ends of the circular disc (2) and at positions corresponding to the output shafts of the plurality of motors (6). A tightening shaft (8) is rotatably provided in the circular hole through a rolling bearing, and the upper and lower ends of the tightening shaft (8) both extend to the outside of the circular hole, and a rectangular block (7) is fixedly provided at the upper end of the tightening shaft (8), and a flange (2) is provided at the end of the output shaft of the motor (6) to cooperate with the rectangular block (7). A rectangular groove, strip holes are provided on both sides of the bottom of the disc (2), strip grooves matching the strip holes are provided on both sides of the bottom of the circular seat (3), a locking mechanism is provided between the strip hole and the strip groove, the locking mechanism comprises a slide bar (11), the slide bar (11) is horizontally fixedly arranged in the strip hole, a rectangular rod (12) is slidably provided on the side of the rod wall of the slide bar (11) away from the tightening shaft (8), the upper end of the rectangular rod (12) extends into the strip groove, a locking block (10) is fixedly provided on the groove wall on the side of the strip groove away from the tightening shaft (8), a locking groove matching the locking block (10) is provided on the rod wall of the rectangular rod (12), and a spring (13) is movably provided on the side of the rod wall of the slide bar (11) close to the tightening shaft (8).

2. A screw pre-tightening machine according to claim 1, characterized in that: A limiting ring (9) is slidably provided inside the circular groove, and the lower end of the limiting ring (9) is fixedly connected to the upper end of the disc (2).

3. A screw pre-tightening machine according to claim 1, characterized in that: The lower side of the locking block (10) is provided with an inclined surface.

4. A screw pre-tightening machine according to claim 3, characterized in that: The angle of the inclined surface is set to 45°.

5. The screw pre-tightening machine according to claim 1, characterized in that: The spring (13) is always in a compressed state.

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