阅读说明：本技术 恒力执行机构及恒力砂带机 (Constant force actuating mechanism and constant force abrasive belt machine ) 是由 张士镇 齐萌 于 2020-06-30 设计创作，主要内容包括：本发明涉及涉及精密机械技术领域,提出了恒力执行机构及恒力砂带机,恒力执行机构包括恒力打磨件,还包括设置在恒力打磨件上的位置传感器,用于感知工件的位置信息,还包括第一伸缩缸,伸缩端设置在恒力打磨件上,用于驱动恒力打磨件移动,恒力打磨件包括设置在第一伸缩缸的伸缩端的打磨轮,还包括连接装置,连接装置一端连接打磨轮,连接装置另一端连接张紧轮,恒力砂带机包括恒力执行机构、安装架、砂带以及缓冲装置。通过上述技术方案,解决了现有技术中砂带机对工件的打磨力不能自动调节的问题。(The invention relates to the technical field of precision machinery, and provides a constant force actuating mechanism and a constant force belt sander. Through above-mentioned technical scheme, the problem that prior art abrasive band machine can not automatically regulated to the power of polishing of work piece has been solved.)

1. A constant force actuating mechanism comprises a constant force polishing piece (1) and is characterized by also comprising

A position sensor (2) arranged on the constant-force grinding piece (1) and used for sensing the position information of the workpiece,

a first telescopic cylinder (3), the telescopic end of which is arranged on the constant-force polishing piece (1) and is used for driving the constant-force polishing piece (1) to move,

the constant-force grinding part (1) comprises

A grinding wheel (4), wherein the grinding wheel (4) is arranged at the telescopic end of the first telescopic cylinder (3),

one end of the connecting device (5) is connected with the grinding wheel (4),

and the other end of the connecting device (5) is connected with the tensioning wheel (6).

2. Constant force actuator according to claim 1, wherein the connection means (5) comprise

A second telescopic bar (7), the grinding wheel (4) and the cylinder body of the second telescopic bar (7) move synchronously, the tension wheel (6) and the piston rod of the second telescopic bar (7) move synchronously,

the connecting device (5) further comprises

And two connecting shafts (8) are provided, wherein one connecting shaft connects the grinding wheel (4) and the cylinder body of the second telescopic bar (7), and the other connecting shaft connects the tensioning wheel (6) and the piston rod of the second telescopic bar (7).

3. The constant-force actuator according to claim 2, wherein the connecting shaft (8) is a ball spline shaft,

also comprises

The ball spline housing (26) is sleeved on the connecting shaft (8) and used for being arranged on the mounting frame (9).

4. A constant force belt sander, comprising the constant force actuator according to any one of claims 1 to 3, further comprising

A mounting rack (9), wherein the cylinder body of the first telescopic cylinder (3) is arranged on the mounting rack (9),

an abrasive belt (10), wherein the abrasive belt (10) is wound on the grinding wheel (4) and the tension wheel (6), the tension wheel (6) is used for tensioning the abrasive belt (10),

a damping device (11), said damping device (11) being located beside said grinding wheel (4).

5. The constant force belt sander of claim 4, further comprising

A plurality of adjusting wheels (12) which are rotatably arranged on the mounting rack (9), the abrasive belts (10) are wound on the adjusting wheels (12), the adjusting wheels (12) are arranged on two sides of the constant-force grinding piece (1) and are used for enabling the abrasive belts (10) on the upper side and the lower side of the grinding wheel (4) to be arranged along a first direction and to be parallel to each other and enabling the abrasive belts (10) on the upper side and the lower side of the tension wheel (6) to be arranged along the first direction and to be parallel to each other,

and the driving wheel (13) is wound with the abrasive belt (10) and arranged on the mounting frame (9) and is used for driving the abrasive belt (10) to rotate.

6. A constant-force belt sander as set forth in claim 5, characterized in that said mounting frame (9) is provided with a runner (14) in a first direction, and said damping means (11) comprises

A third telescopic cylinder (15), the cylinder body of the third telescopic cylinder (15) is arranged on the mounting rack (9),

a connecting plate (16) which is arranged in the sliding groove (14) in a sliding way and is connected with a piston rod of the third telescopic cylinder (15),

a position adjusting link (17) provided on the connecting plate (16),

and a buffer wheel (18) arranged on the position adjusting connecting rod (17).

7. A constant-force belt sander according to claim 6, characterized in that the position-adjusting link (17) comprises

A height adjusting member (19) provided on the connecting plate (16),

a connecting rod (20) which is arranged on the height adjusting piece (19) in a sliding way along a first direction, one end of the connecting rod is provided with the buffer wheel (18),

the height adjusting member (19) comprises

A column (21) arranged on the connecting plate (16) and arranged perpendicular to the first direction,

connecting piece (22), set up on cylinder (21), connecting piece (22) slide to set up on cylinder (21), by retaining member locking, connecting rod (20) slide along first direction and set up on connecting piece (22), by retaining member locking.

8. The constant force belt sander of claim 7, further comprising

A shield shell (23) provided on the mounting frame (9) for mounting the connecting device (5) therein.

9. The constant-force belt sander according to claim 8, wherein one side of the position sensor (2) is provided with a snap groove (25), the constant-force belt sander further comprising

The clamping pieces (24) are arranged on the mounting rack (9), and the position sensors (2) are arranged on the clamping pieces (24) through the clamping grooves (25).

10. The constant-force belt sander according to any one of claims 5 to 9, wherein the number of grinding wheels (4) is two or more.

Technical Field

The invention relates to the technical field of precision machinery, in particular to a constant force actuating mechanism and a constant force belt sander.

Background

Along with the development of science and technology in recent years, the machine replaces the manual work and becomes a trend gradually, in the course of working of precision parts, often need polish or polish workpiece surface, the abrasive band machine is often used to polishing process, the abrasive band machine has become the selection of a lot of automatic items of polishing, in practical application, the work piece size that generally needs to polish is different, the position that needs to polish is also different, but because automatic machine does not possess the ability of perception, the power that leads to polishing can not automatically regulated, and then traditional abrasive band machine is difficult to satisfy the working requirement.

Disclosure of Invention

The invention provides a constant-force abrasive belt machine, which solves the problem that the grinding force of an abrasive belt machine on a workpiece cannot be automatically adjusted in the prior art.

The technical scheme of the invention is as follows:

a constant force actuating mechanism comprises a constant force polishing piece and is characterized by also comprising

A position sensor arranged on the constant-force polishing piece and used for sensing the position information of the workpiece,

a first telescopic cylinder, the telescopic end of which is arranged on the constant force polishing piece and is used for driving the constant force polishing piece to move,

the constant force polishing member comprises

A grinding wheel arranged at the telescopic end of the first telescopic cylinder,

one end of the connecting device is connected with the grinding wheel,

the other end of the connecting device is connected with the tensioning wheel.

As a further technical solution, the connecting device comprises

A second telescopic bar, the polishing wheel and the cylinder body of the second telescopic bar move synchronously, the tensioning wheel and the piston rod of the second telescopic bar move synchronously,

the connecting device also comprises

And two connecting shafts are provided, wherein one connecting shaft is connected with the polishing wheel and the cylinder body of the second telescopic bar, and the other connecting shaft is connected with the tensioning wheel and the piston rod of the second telescopic bar.

As a further technical proposal, the connecting shaft is a ball spline shaft,

also comprises

And the ball spline sleeve is sleeved on the connecting shaft.

A constant force belt sander comprises the constant force actuating mechanism of any one of claims 1 to 3, and is characterized by further comprising a mounting frame, wherein a cylinder body of the first telescopic cylinder is arranged on the mounting frame,

the abrasive belt is wound on the grinding wheel and the tension wheel, the tension wheel is used for tensioning the abrasive belt,

a buffer device located beside the grinding wheel.

As a further technical proposal, the method also comprises

A plurality of adjusting wheels which are rotatably arranged on the mounting rack, the abrasive belts are wound on the adjusting wheels, the adjusting wheels are arranged at two sides of the constant-force grinding piece and are used for enabling the abrasive belts at the upper side and the lower side of the grinding wheel to be arranged along a first direction and to be parallel to each other, and the abrasive belts at the upper side and the lower side of the tensioning wheel to be arranged along the first direction and to be parallel to each other,

the driving wheel is wound with the abrasive belt and arranged on the mounting frame and used for driving the abrasive belt to rotate.

As a further technical scheme, a sliding groove is arranged on the mounting frame along the first direction, and the buffering device comprises

A third telescopic cylinder, the cylinder body of which is arranged on the mounting rack,

a connecting plate which is arranged in the chute in a sliding way and is connected with the piston rod of the third telescopic cylinder,

a position adjusting connecting rod arranged on the connecting plate,

and the buffer wheel is arranged on the position adjusting connecting rod.

As a further technical solution, the position adjusting link comprises

A height adjusting member provided on the connecting plate,

a connecting rod arranged on the height adjusting piece in a sliding way along a first direction, one end of the connecting rod is provided with the buffer wheel,

the height adjusting member comprises

A column arranged on the connecting plate and perpendicular to the first direction,

the connecting piece is arranged on the column body, the connecting piece is arranged on the column body in a sliding manner and is locked by the locking piece,

the connecting rod is arranged on the connecting piece in a sliding mode along the first direction and locked by the locking piece.

As a further technical proposal, the method also comprises

And the retaining shell is arranged on the mounting rack and is used for mounting the connecting device in the retaining shell.

As a further technical scheme, one side of the position sensor is provided with a clamping groove, and the constant force belt sander further comprises

The clamping pieces are provided with a plurality of clamping pieces and arranged on the mounting frame, and the position sensors are arranged on the clamping pieces through the clamping grooves.

As a further technical scheme, the number of the grinding wheels is more than or equal to two.

As a further technical proposal, the method also comprises

A boss disposed on the mounting bracket,

a fourth telescopic cylinder, the cylinder body of which is arranged on the boss, wherein one of the adjusting wheels is arranged on a piston rod of the fourth telescopic cylinder,

and the second position sensor is arranged beside the fourth telescopic cylinder and used for sensing the position information of the constant-force grinding piece.

The working principle and the beneficial effects of the invention are as follows:

1. in the invention, the constant force actuating mechanism is used in equipment for polishing workpieces, the workpieces can be polished by using constant force, an abrasive belt is wound on a polishing wheel, the abrasive belt is in contact polishing with the workpieces, the polishing wheel can be subjected to pressure brought by the workpieces, a position sensor is used for sensing position information of the polishing wheel, the position sensor is matched with a first telescopic cylinder, when the pressure transmitted by the workpieces is large, the first telescopic cylinder drives the polishing wheel to contract, when the pressure transmitted by the workpieces is small, the first telescopic cylinder drives the polishing wheel to move forwards to realize constant force polishing, one end of a connecting device is provided with a tension wheel, the other end of the connecting device is provided with the polishing wheel, the connecting device is used for connecting the tension wheel and the polishing wheel into a whole, and the abrasive belts arranged on the polishing wheel and the tension wheel are respectively parallel to each other at two sides of the wheel, so the design can ensure that the abrasive belts wound on, make the abrasive band drop, compare with conventional structure, the structure is more reasonable, and it is effectual to polish, and the abrasive band machine can realize automatically regulated to the power of polishing of work piece.

2. The constant-force belt sander comprises a constant-force executing mechanism, wherein a constant-force grinding part is arranged on an installation frame, a grinding wheel and a tension wheel are respectively and rotatably arranged at two ends of the constant-force grinding part, an abrasive belt is wound on the grinding wheel and the tension wheel, when the abrasive belt is installed, the relative positions of the grinding wheel and the tension wheel at the two ends of the constant-force grinding part cannot change, a workpiece is ground and polished at the abrasive belt on the grinding wheel, a first telescopic cylinder can be a rodless cylinder, the space is saved, the first telescopic cylinder is arranged on the installation frame, an output end of the first telescopic cylinder is connected with the grinding wheel and used for driving the grinding wheel to move along a first direction, the first direction is the telescopic direction of the first telescopic cylinder and can be a horizontal direction, in addition, the output pressure of the first telescopic cylinder can be adjusted by a PLC control servo valve, a required value is set through a human-computer interface or is directly, when the grinding force of the grinding wheel on the workpiece is greater than the output pressure of the first telescopic cylinder, the grinding wheel, the tension wheel and the connecting device are driven by the first telescopic cylinder to retract backwards along the first direction, so that the force acting on the workpiece is reduced, when the grinding force of the grinding wheel on the workpiece is less than the output pressure of the first telescopic cylinder, the grinding wheel, the tension wheel and the connecting device move forwards along the first direction under the drive of the first telescopic cylinder, so that the force acting on the workpiece is increased, and the backward retraction range and the forward range are both within the stroke range set by the connecting device, so that the purpose of grinding the workpiece with constant force is realized by the structure, and the relative positions of the grinding wheel and the tension wheel at the two ends of the connecting device are fixed, so that the structure can not cause the abrasive belt coated on the grinding wheel to be loosened due to the movement of the grinding wheel in the constant-force grinding process, moreover, due to the existence of the first telescopic cylinder, constant force adjustment is more intelligent and precise, and workpieces with various polishing precision can be processed, so that the machining process is more intelligent and mechanical.

Furthermore, when the workpiece to be polished is an intermittent workpiece, when the previous workpiece is polished, the polishing wheel needs to apply a polishing force to the workpiece, the polishing wheel retracts backwards to a part of the stroke under the drive of the first telescopic cylinder, but when the previous workpiece is polished and the next workpiece is not yet polished, the polishing wheel returns to the initial position under the drive of the first telescopic cylinder due to no pressure at the polishing wheel, when the next workpiece moves to the polishing position of the polishing wheel, the next workpiece directly hits against the side surface of the polishing wheel, so that in order to enable the constant-force polisher to polish the intermittent workpiece, the buffer device is arranged on the mounting frame and is arranged on one side of the polishing wheel, the buffer device is touched when the workpiece comes, the polishing wheel can be prevented from directly touching the workpiece, when the workpiece reaches a proper position, the buffer device retracts, the polishing wheel is contacted with the workpiece, and the workpiece can be effectively prevented from directly hitting against the polishing wheel, if the constant-force belt sander is designed to polish the last workpiece, the polishing wheel retracts completely, the next workpiece is polished and extends out again, the time is too long, and the time is not controlled well, so that the constant-force belt sander can effectively solve the problem that discontinuous workpieces are polished by constant force, and the application range of the constant-force belt sander can be enlarged.

Drawings

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

FIG. 1 is a schematic structural view of a constant force belt sander of the present invention;

FIG. 2 is a schematic structural view of a constant force actuator according to the present invention;

FIG. 3 is a schematic structural view of the constant force belt sander of the present invention;

FIG. 4 is a schematic structural view of a blocking shell of the constant-force belt sander;

FIG. 5 is a schematic structural view of the constant force belt sander of the present invention;

in the figure: 1-constant force grinding part, 2-position sensor, 3-first telescopic cylinder, 4-grinding wheel, 5-connecting device, 6-tensioning wheel, 7-second telescopic rod, 8-connecting shaft, 9-mounting frame, 10-abrasive belt, 11-buffer device, 12-adjusting wheel, 13-driving wheel, 14-sliding chute, 15-third telescopic cylinder, 16-connecting plate, 17-position adjusting connecting rod, 18-buffer wheel, 19-height adjusting part, 20-connecting rod, 21-cylinder, 22-connecting part, 23-blocking shell, 24-clamping part, 25-clamping groove, 26-ball spline sleeve, 27-fourth telescopic cylinder, 28-second position sensor, 29-air nozzle, 30-temperature sensor, 31-collecting groove, 32-boss.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are intended to be within the scope of the present invention.