CN218505311U

CN218505311U - Servo press-fitting device with built-in pressure sensor

Info

Publication number: CN218505311U
Application number: CN202222526488.4U
Authority: CN
Inventors: 徐朝明; 刘新海
Original assignee: Shanghai Moons' Automation Control Co ltd
Current assignee: Shanghai Moons' Automation Control Co ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-02-21
Anticipated expiration: 2032-09-23

Abstract

The utility model relates to a servo press mounting device with a built-in pressure sensor, which comprises a driving component, a transmission component, a shell, a guide component, a push rod component, a bearing seat component and a ball screw; the driving assembly comprises a servo motor, and the transmission assembly comprises a driving belt wheel arranged on an output shaft of the servo motor, a driven belt wheel arranged on a ball screw and a synchronous belt used for connecting the driving belt wheel and the driven belt wheel; the guide assembly is arranged on the side surface of the shell and comprises a guide plate, and the push rod assembly comprises a push rod fixed on a ball screw nut seat and a cam follower sliding up and down in a guide groove of the guide plate; the bearing seat assembly is arranged in the shell and comprises a lower corner contact bearing and a pressure sensor, and when a product is pressed, the end face of the step of the ball screw is in contact with the bearing through the lower corner to conduct pressure to the pressure sensor, so that pressure detection is realized. Compared with the prior art, the utility model has the advantages of the pressure equipment precision of product has been improved greatly.

Description

Servo press-fitting device with built-in pressure sensor

Technical Field

The utility model relates to a mechanical press fitting equipment especially relates to a built-in pressure sensor's servo press fitting device.

Background

In the motor assembly, the bearing, the belt wheel and the rotating shaft are often required to be pressed and mounted. Along with the development of high and new technology, the requirement of a client on product press-mounting precision, quality and stability is higher and higher, but a plurality of servo presses in China are provided, the current common method is to add a pressure detection sensor on the basis of the traditional servo electric cylinder so as to realize the function of the servo press, as the servo press is in the working process, most of the servo presses adopt an external mode of the pressure sensor, namely the pressure sensor is arranged outside the body of the servo electric cylinder, the pressure sensor is added at the tail end of a push rod of the servo electric cylinder, and the pressure sensor can move linearly along with the push rod, so that the cable of the pressure sensor is damaged easily during movement; after a pressure head at the lower end of the pressure sensor is installed, the parallelism of a press-mounting surface and the pressure sensor surface is difficult to ensure, the parallelism of the press-mounting surface needs to be adjusted every time the pressure head is replaced, otherwise, the press-mounting precision of a product is difficult to ensure; meanwhile, the external arrangement of the pressure sensor is greatly influenced by the external environment, and the press mounting precision can be reduced or unstable along with the change of the working environment.

Therefore, how to further improve the stability and the precision of press fitting becomes a technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure is compact, convenient to use, improved the built-in pressure sensor's of the pressure equipment precision of product servo pressure equipment device very much in order to overcome the defect that above-mentioned prior art exists.

The purpose of the utility model can be realized by the following technical proposal:

according to one aspect of the utility model, a servo press mounting device with a built-in pressure sensor is provided, which comprises a driving component, a transmission component, a shell, a guide component, a push rod component, a bearing seat component and a ball screw;

the driving assembly comprises a servo motor, and the transmission assembly comprises a driving belt wheel arranged on an output shaft of the servo motor, a driven belt wheel arranged on a ball screw and a synchronous belt used for connecting the driving belt wheel and the driven belt wheel;

the guide assembly is arranged on the side surface of the shell and comprises a guide plate, and the push rod assembly comprises a push rod fixed on a ball screw nut seat and a cam follower sliding up and down in a guide groove of the guide plate;

the bearing seat assembly is arranged in the shell and comprises a lower corner contact bearing and a pressure sensor, and when a product is pressed, the end face of the step of the ball screw is in contact with the bearing through the lower corner to conduct pressure to the pressure sensor, so that pressure detection is realized.

As a preferred technical scheme, the driving assembly further comprises a motor flange, the servo motor is fixed on the motor flange, and the tensioning degree of the synchronous belt is adjusted by adjusting the position of the motor flange.

As a preferred technical solution, the servo motor is a servo motor using an absolute value encoder.

As a preferred technical scheme, the transmission assembly further comprises a transmission case and a sealing plate, the motor flange is mounted on one end face of the transmission case, and the sealing plate is mounted on the other end face of the transmission case.

Preferably, the driving pulley is connected to an output shaft of the servo motor through a flat key, and the driven pulley is connected to the ball screw through a keyless bushing.

Preferably, the driving pulley is a flanged pulley, and the driven pulley is a non-flanged pulley.

As a preferred technical solution, the guide assembly further comprises a nozzle tip and a silencer for injecting lubricating grease into the guide groove; the muffler is provided with a hole for injecting lubricating grease to the ball screw.

Preferably, the guide plate is used for sealing the housing, so that the clean space can be located in the housing.

As a preferred technical scheme, the push rod assembly further comprises a bushing for ensuring the linear motion position accuracy of the push rod, a limiting dustproof cover for preventing the bushing from moving up and down, a pressure head positioning block and a first oil seal;

the first oil seal is arranged in the limiting dustproof cover and used for preventing dust from entering along with the push rod.

As a preferred technical scheme, the bearing seat assembly further comprises a nut for a bearing, a deep groove ball bearing, an upper corner contact bearing and a shaft ring;

the pressure sensor is arranged between the upper angular contact bearing and the lower angular contact bearing, and the deep groove ball bearing is sleeved on the ball screw shaft and is pre-pressed, locked and fixed by a nut;

the pressure born by the ball screw is transmitted to the lower corner contact bearing inner ring through the shaft ring on the step surface of the ball screw, and the lower corner contact bearing outer ring is transmitted to the pressure sensor, so that the pressure detection can be realized.

Compared with the prior art, the utility model has the advantages of it is following:

1) The pressure sensor is arranged in the bearing seat component, and the conduction force is extruded to the pressure sensor through the angular contact bearing at the lower end, so that the pressure detection is realized;

2) The utility model discloses casing side-mounting has the direction subassembly, slide from top to bottom in the guide way through fixing 2 cam follower on the push rod in the deflector, prevent that the push rod from taking place to deflect when the ball upper nut rotates, only along with ball upper nut seat linear motion from top to bottom, 2 individual cam follower is better improvement its positioning accuracy when improving anti torsional force, guarantee its axial motion's linearity, the stability and the pressure equipment precision of pressure equipment have been improved, simultaneously through the setting of force transducer and PLC controller, can set up power in the software, main pressure equipment parameters such as displacement and speed, also can set up the mode of stopping of accurate pressure equipment, in order to realize carrying out quantization control's mesh when the product pressure equipment to servo pressure equipment device, thereby realize servo pressure equipment device's pressure equipment function, and the steam generator is simple in structure, high durability and convenient use, pressure equipment precision advantage such as high.

Drawings

Fig. 1 is a schematic structural diagram of the servo press-fitting device with a built-in force sensor of the present invention.

Fig. 2 is a transverse sectional view of the servo press-fitting device with a built-in force sensor of the present invention.

Fig. 3 is a longitudinal sectional view of the servo press-fitting device with a built-in force sensor of the present invention.

In the figure: 1-driving component, 2-transmission component, 3-shell, 4-guiding component, 5-push rod component, 6-bearing seat component, 7-ball screw, 101-servo motor, 102-motor flange, 201-transmission box, 202-driving pulley, 203-driven pulley, 204-synchronous belt, 205-closing plate, 401-guide plate, 402-oil nozzle, 403-silencer, 501-push rod, 502-bushing, 503-limit dust-proof cover, 504-pressure head positioning block, 505-first oil seal, 506-cam follower, 601-bearing seat, 602-upper bearing end cover, 603-lower bearing end cover, 604-nut for bearing, 605-deep groove ball bearing, 606-upper corner contact bearing, 607-lower corner contact bearing, 608-pressure sensor, 609-second oil seal, 610-collar.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in fig. 1, fig. 2 and fig. 3, the utility model provides a servo press mounting device with a built-in force sensor, which comprises a driving assembly 1, a transmission assembly 2, a housing 3, a ball screw 7, a bearing seat assembly 6, a push rod assembly 5, a guide assembly 4 and the like. The driving assembly 1 adopts a turn-back structure and is positioned below the transmission assembly 2, a driving belt pulley 202 of the transmission assembly 2 is arranged on an output shaft of a servo motor 101 of the driving assembly 1, a driven belt pulley 203 is arranged on a ball screw 7, and transmission is completed through a synchronous belt 204, so that the rotary motion of the ball screw 7 is converted into the up-and-down reciprocating linear motion of a push rod 501; the bearing seat assembly 6 is arranged in the upper end surface of the shell 3, the pressure sensor 608 is arranged in the bearing seat assembly 6, and when a product is pressed, the step end surface of the ball screw 7 is in contact with the bearing 607 through the lower corner in the bearing seat assembly 6 to transmit pressure to the pressure sensor 608, so that pressure detection is realized; a push rod 501 of the push rod assembly 5 is fixed on the nut seat of the ball screw 7 and linearly reciprocates up and down along with the nut seat of the ball screw 7; the guide assembly 4 is fixed on the side of the shell 3, the cam follower 506 of the push rod assembly 5 slides up and down in the guide groove of the guide plate 401 in the guide assembly 4, so that the push rod 501 can be prevented from rotating, meanwhile, the guide plate 401 has the function of sealing the shell 3, dust is prevented from entering the shell 3 of the press, and the shell 3 of the press can be located in a clean space.

The driving assembly 1 comprises a servo motor 101 and a motor flange 102, adopts a turn-back structure, is positioned below the transmission assembly 2, and transmits the power of the ball screw 7 through a driving pulley 202, a driven pulley 203 and a synchronous belt 204 of the transmission assembly 2. The servo motor 101 is fixed on the motor flange 102, the motor flange 102 is fixed on the transmission case 201, and the tension degree of the synchronous belt 204 can be adjusted by adjusting the position of the motor flange 102. The motor in the driving component 1 is a servo motor adopting an absolute value encoder.

The transmission assembly 2 comprises a driving pulley 202, a driven pulley 203, a synchronous belt 204, a transmission case 201 and a sealing plate 205, wherein the driving pulley 202 is connected with an output shaft of the servo motor 101 through a flat key, and the driven pulley 203 is connected with a ball screw 7 through a keyless bush; the driving pulley 202 is a flange pulley, and the driven pulley 203 is a non-flange pulley.

The guide assembly 4 is fixed on the side of the housing 3 and comprises a guide plate 401, a nozzle 402 and a silencer 403. The cam follower 506 fixed on the push rod 501 can slide up and down in the guide groove of the guide plate 401, and the cam follower is tightly matched with the guide groove 506, so that the problem that the position of the push rod 501 deviates due to deflection of the push rod 501, and the press-fitting precision of a product is influenced can be effectively solved; meanwhile, the guide plate 401 has the function of sealing the shell 3, so that the interior of the press shell 3 is in a clean space. The push rod 501 may generate a loud noise when it is driven up and down, the noise silencer 403 on the guide plate 401 may effectively eliminate the noise, and lubricating grease may be injected into the ball screw 7 through the hole of the noise silencer 403. Grease can be injected into the channels of the guide plate 401 through the oil nipples 402 on the guide plate 401 to lubricate the channels.

The push rod assembly 5 is fixed on a nut seat of the ball screw 7, and the push rod assembly 5 linearly reciprocates up and down along with the nut seat of the ball screw 7 and comprises a push rod 501, a bushing 502, a limiting dustproof cover 503, a pressure head positioning block 504, a first oil seal 505 and a cam follower 506. When the ball screw 7 rotates, the cam follower 506 fixed on the push rod 501 slides up and down in the guide groove in the guide plate 401, the push rod 501 linearly reciprocates up and down along with the nut seat of the ball screw 7, the linear motion position accuracy of the push rod 501 is ensured by the bushing 502 at the lower end, the position of the bushing 502 is prevented from moving up and down by the limiting dustproof cover 503, and the first oil seal 505 at the lower end is hidden in the limiting dustproof cover 503 to prevent dust from entering along with the push rod 501 to influence the press-fitting accuracy.

The bearing block assembly 6 is fixed in the upper end face of the housing 3 and comprises a bearing block 601, an upper corner contact bearing 606, a lower corner contact bearing 607, an upper bearing end cover 602, a lower bearing end cover 603, a pressure sensor 608, a collar 610, a deep groove ball bearing 605, a second oil seal 609 and a nut 604 for bearing. The pressure sensor 608 is built into the bearing block assembly 6 between the upper and lower angular contact bearings. The pressure applied to the ball screw 7 is transmitted to the inner ring of the lower corner contact bearing 607 through the shaft ring 610 on the step surface, and then transmitted to the pressure sensor, so that the pressure detection can be realized. The deep groove ball bearing 604 on the upper end of the bearing seat component is sleeved on the ball screw 7 shaft and is pre-pressed, locked and fixed by a nut 605 for the bearing, so that dust can be prevented from entering.

The utility model discloses a theory of operation is: the driving pulley 202 is mounted on the output shaft of the servo motor 101 of the driving assembly 1, the driven pulley 203 is mounted on the ball screw 7, the push rod 501 is fixed on the nut seat of the ball screw 7, and when the servo motor 101 rotates, the rotation motion of the ball screw 7 is converted into the vertical reciprocating linear motion of the push rod 501 through the synchronous belt 204. The cam follower 506 fixed to the push rod 501 slides up and down in the guide groove of the guide plate 401 in the guide assembly 4, preventing the push rod 501 from rotating. The pressure sensor 608 is arranged in the bearing seat assembly 6 between the upper and lower corner contact bearings, when a product is pressed, the push rod transmits pressure to the rotating shaft of the ball screw 7 through the nut seat of the ball screw 7, the rotating shaft of the ball screw 7 transmits the pressure to the shaft collar 610 on the step surface of the ball screw, the shaft collar 610 transmits the pressure to the inner ring of the lower corner contact bearing 607, the outer ring of the lower corner contact bearing 607 transmits the pressure to the pressure sensor, and the pressure sensor detects pressure change and outputs a real-time pressure signal. Drive ball 7 through servo motor 101 and move, position that control push rod 501 up-and-down motion that can be accurate to there is pressure real-time feedback, consequently, the utility model provides a pair of servo pressure equipment device of built-in force transducer can real time monitoring product pressure variation and displacement data in the pressure equipment, and product pressure equipment process is controllable, and the pressure equipment precision is higher, and the pressure equipment steady quality is reliable.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A servo press-fitting device with a built-in pressure sensor is characterized by comprising a driving assembly (1), a transmission assembly (2), a shell (3), a guide assembly (4), a push rod assembly (5), a bearing seat assembly (6) and a ball screw (7);

the driving assembly (1) comprises a servo motor (101), and the transmission assembly (2) comprises a driving pulley (202) arranged on an output shaft of the servo motor (101), a driven pulley (203) arranged on a ball screw (7) and a synchronous belt (204) used for connecting the driving pulley (202) and the driven pulley (203);

the guide assembly (4) is arranged on the side surface of the shell (3) and comprises a guide plate (401), the push rod assembly (5) comprises a push rod (501) fixed on a nut seat of the ball screw (7) and a cam follower (506) sliding up and down in a guide groove of the guide plate (401);

the bearing seat assembly (6) is arranged in the shell (3) and comprises a lower corner contact bearing (607) and a pressure sensor (608), and when a product is pressed, the pressure is transmitted to the pressure sensor (608) through the lower corner contact bearing (607) by the step end face of the ball screw (7), so that pressure detection is realized.

2. The servo press-fitting device with the built-in pressure sensor as claimed in claim 1, wherein the driving assembly (1) further comprises a motor flange (102), the servo motor (101) is fixed on the motor flange (102), and the tensioning degree of the synchronous belt (204) is adjusted by adjusting the position of the motor flange (102).

3. A servo press-fitting device with a built-in pressure sensor according to claim 1 or 2, wherein said servo motor (101) is a servo motor using an absolute value encoder.

4. The servo press-fitting device with the built-in pressure sensor as claimed in claim 2, wherein the transmission assembly (2) further comprises a transmission case (201) and a sealing plate (205), the motor flange (102) is mounted on one end face of the transmission case (201), and the sealing plate (205) is mounted on the other end face of the transmission case (201).

5. The servo press-fitting device with the built-in pressure sensor as claimed in claim 1, wherein the driving pulley (202) is connected with an output shaft of the servo motor (101) through a flat key, and the driven pulley (203) is connected with the ball screw (7) through a keyless bush.

6. The servo press-fitting device with the built-in pressure sensor as claimed in claim 1 or 5, wherein the driving pulley (202) is a flanged pulley, and the driven pulley (203) is an unbaffled pulley.

7. A servo press-fitting device with a built-in pressure sensor according to claim 1, wherein said guide assembly (4) further comprises a nozzle tip (402) and a silencer (403) for injecting grease into the guide groove; the muffler (403) is provided with a hole for injecting lubricating grease to the ball screw (7).

8. A servo press-fitting device with a built-in pressure sensor according to claim 1, wherein said guide plate (401) is a guide plate for sealing the housing (3) so as to keep a clean space inside the housing (3).

9. The servo press-fitting device with the built-in pressure sensor according to claim 1, wherein the push rod assembly (5) further comprises a bushing (502) for ensuring the linear motion position accuracy of the push rod (501), a limiting dustproof cover (503) for preventing the position of the bushing (502) from moving up and down, a pressure head positioning block (504) and a first oil seal (505);

the first oil seal (505) is arranged in the limiting dustproof cover (503) and used for preventing dust from entering along with the push rod (501).

10. The servo press-fitting device with the built-in pressure sensor as recited in claim 1, wherein the bearing housing assembly (6) further comprises a nut (604) for a bearing, a deep groove ball bearing (605), an upper corner contact bearing (606) and a collar (610);

the pressure sensor (608) is arranged between an upper angular contact bearing (606) and a lower angular contact bearing (607), the deep groove ball bearing (605) is sleeved on a ball screw shaft (7) and is pre-pressed, locked and fixed by a nut (604) for the bearing;

the pressure borne by the ball screw (7) is transmitted to the inner ring of the lower-angle contact bearing (607) through a shaft ring (610) on the step surface of the ball screw, and the outer ring of the lower-angle contact bearing (607) is transmitted to the pressure sensor (608), so that pressure detection can be realized.