Anti-dead-point reversing assembly for pneumatic spraying machine motor

Abstract

The utility model discloses an anti-dead-point reversing assembly for a pneumatic coating machine motor, which comprises an outer cylinder barrel, a reversing piston, an anti-dead-point steel ball and an elastic piece, the reversing piston is arranged on the outer cylinder barrel in a sliding manner, the axial end part of the reversing piston is provided with a guide post extending along the axial direction, the guide post is provided with an anti-dead-point bulge, and the anti-dead-point bulge is provided with an anti-dead-point steel ball. The anti-dead-point steel ball is mounted on the inner wall surface of the outer cylinder barrel through an elastic piece, and the anti-dead-point steel ball abuts against the surface of the guide column under the action of the elastic force of the elastic piece; according to the anti-dead-point reversing assembly for the motor of the pneumatic spraying machine, when the reversing piston enters a dead point or passes through the dead point, the arranged anti-dead-point steel ball abuts against and extrudes the anti-dead-point protrusion under the action of elastic force of the elastic piece, then the anti-dead-point protrusion is pushed to be separated from the dead point, sliding continuity of the reversing piston is guaranteed, and the anti-dead-point reversing assembly is suitable for the motor of the pneumatic spraying machine. Therefore, the motor of the pneumatic spraying machine is effectively prevented from crashing, and the overall performance of the motor of the pneumatic spraying machine is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of spraying equipment and relates to an anti-dead point reversing assembly for a pneumatic spraying machine motor. Background Art

[0002] The pneumatic sprayer motor uses compressed air as its power source, and changes the air intake direction through the reversing mechanism to drive the pneumatic sprayer motor to slide back and forth. During the operation of the pneumatic motor, when the channel area opened by the motor's pilot valve is small, the thrust generated by the compressed gas is small, and this thrust is just balanced with the friction force, causing the reversing piston in the traditional reversing mechanism to move slowly. When the reversing piston in the traditional structure moves to the middle position, the pressure at the upper and lower ends of the large piston is balanced, causing the large piston to be unable to move, resulting in a dead point.

[0003] In order to solve the above problems, it is necessary to design a reversing mechanism to ensure that the pneumatic motor can continue to run during operation and will not enter the dead point, or it can actively disengage when the reversing piston passes the dead point to ensure the continuity of the sliding of the reversing piston, thereby effectively preventing the pneumatic sprayer motor from freezing and improving the overall performance of the pneumatic sprayer motor. Utility Model Content

[0004] In view of this, the utility model provides an anti-dead point reversing assembly for a pneumatic sprayer motor. When the reversing piston enters or passes through the dead point, the anti-dead point steel ball is supported and squeezed by the elastic force of the elastic part, thereby pushing the anti-dead point protrusion away from the dead point, thereby ensuring the continuity of the sliding of the reversing piston, thereby effectively preventing the pneumatic sprayer motor from freezing and improving the overall performance of the pneumatic sprayer motor.

[0005] The utility model discloses an anti-dead point reversing assembly for a pneumatic sprayer motor, comprising an outer cylinder, a reversing piston and a supporting component, wherein the supporting component comprises an anti-dead point steel ball and an elastic member, the reversing piston is slidably arranged on the outer cylinder, the axial end of the reversing piston is provided with a guide column extending along the axial direction, the guide column is provided with an anti-dead point protrusion, the anti-dead point steel ball is installed on the inner wall surface of the outer cylinder through the elastic member, and the anti-dead point steel ball is supported on the surface of the guide column under the action of the elastic force of the elastic member.

[0006] Furthermore, the anti-dead point steel ball is arranged corresponding to the position of the anti-dead point protrusion when the reversing piston slides to the dead point position.

[0007] Furthermore, the anti-dead point protrusion is composed of a supporting surface and a guiding surface, and the axial ends of the supporting surface are respectively connected to the surface of the guide column through two guiding surfaces.

[0008] Furthermore, the reversing piston divides the outer cylinder into an upper chamber, a middle chamber and a lower chamber axially from top to bottom, and the guide column and the abutting assembly are both arranged in the upper chamber.

[0009] Furthermore, it also includes an air inlet, an upper exhaust channel and a lower exhaust channel arranged on the outer cylinder, the upper exhaust channel is connected with the upper chamber for discharging the gas in the upper chamber, and the lower exhaust channel is connected with the lower chamber for discharging the gas in the lower chamber; the air inlet is arranged in the middle chamber for supplying gas to enter the outer cylinder.

[0010] Furthermore, it also includes an upper end cover and a lower end cover, and the upper end cover and the lower end cover are respectively installed on the axial upper end and the lower end of the outer cylinder barrel to close the outer cylinder barrel.

[0011] Furthermore, the abutting surface is away from the surface of the guide column, and the two guide surfaces are symmetrically and tiltedly arranged.

[0012] Furthermore, the abutting assembly also includes a mounting seat, and the elastic member and the anti-dead point steel ball are both mounted on the outer cylinder via the mounting seat.

[0013] Furthermore, the abutting components are evenly arranged in a plurality of groups along the circumferential direction.

[0014] Beneficial effects of the utility model:

[0015] The utility model provides an anti-dead point reversing assembly for a pneumatic sprayer motor. When the reversing piston enters or passes through the dead point, an anti-dead point steel ball is arranged to resist and squeeze the anti-dead point protrusion under the elastic force of the elastic member, thereby pushing the anti-dead point protrusion away from the dead point, thus ensuring the sliding continuity of the reversing piston, thereby effectively preventing the pneumatic sprayer motor from freezing and improving the overall performance of the pneumatic sprayer motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 for Figure 1 A partial enlarged view of point A in the middle. DETAILED DESCRIPTION

[0018] It should be noted that in the description of this specification, the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The axial direction in this embodiment is the axial direction of the reversing piston, the radial direction is the direction perpendicular to the axis, that is, the diameter direction of the reversing piston, and the axial direction is the circumferential direction of the reversing piston.

[0019] The utility model discloses an anti-dead point reversing assembly for a pneumatic sprayer motor, comprising an outer cylinder 3, a reversing piston 1 and a holding assembly, wherein the holding assembly comprises an anti-dead point steel ball 4 and an elastic member 5, wherein the reversing piston 1 is slidably arranged on the outer cylinder 3, and an axial end of the reversing piston 1 is provided with a guide column 2 extending in the axial direction, wherein the guide column 2 is provided with an anti-dead point protrusion 7, wherein the anti-dead point steel ball 4 is installed on the inner wall surface of the outer cylinder 3 through the elastic member 5, and the anti-dead point steel ball 4 is held against the surface of the guide column 2 under the elastic force of the elastic member 5. In this embodiment, the anti-dead point steel ball 4 is arranged corresponding to the position of the anti-dead point protrusion 7 when the reversing piston 1 slides to the dead point position. In this embodiment, when the reversing piston 1 enters or passes through the dead point, the anti-dead point steel ball 4 is arranged to resist and squeeze the anti-dead point protrusion 7 under the elastic force of the elastic member 5, thereby pushing the anti-dead point protrusion 7 out of the dead point, thus ensuring the continuity of the sliding of the reversing piston 1, thereby effectively preventing the motor of the pneumatic sprayer from freezing and improving the overall performance of the motor of the pneumatic sprayer. The anti-dead point steel ball 4 is arranged in a position corresponding to the anti-dead point protrusion 7 when the reversing piston 1 slides to the dead point position, which means that when the reversing piston 1 slides to the middle dead point position, the anti-dead point steel ball 4 is arranged in a position corresponding to the position of the anti-dead point protrusion 7 under the position of the reversing piston 1.

[0020] In this embodiment, the anti-dead point protrusion 7 is composed of a supporting surface 14 and a guiding surface 15, and the axial ends of the supporting surface 14 are respectively connected to the surface of the guide column 2 through two guiding surfaces 15. In this embodiment, the supporting surface 14 is away from the surface of the guide column 2, and the two guiding surfaces 15 are symmetrical and inclined. As shown in the figure, the supporting surface 14 is a structure with a protrusion in the middle and gradually contracted at both axial ends. This structure is conducive to the steel ball 4 pushing the guide column 2 away from the dead point, thereby preventing the reversing piston 1 from entering the dead point and causing the motor to stop.

[0021] In this embodiment, the reversing piston 1 divides the outer cylinder 3 into an upper chamber 12 , a middle chamber and a lower chamber 13 axially from top to bottom, and the guide column 2 and the abutting assembly are both arranged in the upper chamber 12 .

[0022] In this embodiment, it also includes an air inlet, an upper exhaust channel 8 and a lower exhaust channel 9 arranged on the outer cylinder 3. The upper exhaust channel 8 is connected with the upper chamber 12 to discharge the gas in the upper chamber 12, and the lower exhaust channel 9 is connected with the lower chamber 13 to discharge the gas in the lower chamber 13; the air inlet is arranged in the middle chamber for gas to enter the outer cylinder 3. The upper exhaust channel 8 and the lower exhaust channel 9 are used to discharge the gas in the upper chamber 12 and the lower chamber 13 to realize the single-degree-of-freedom sliding of the reversing piston 1. The reversing piston 1 of this embodiment is driven by the pressure difference to realize the sliding. The middle chamber is provided with an air inlet, and the upper chamber 12 and the lower chamber 13 are provided with corresponding channels to communicate with the outside. Take the upper chamber 12 as an example, after the upper exhaust channel 8 is opened and connected with the outside, the high-pressure gas in the upper chamber 12 is discharged, the pressure drops, and the pressure of the middle chamber and the lower chamber 13 remains unchanged. At this time, the reversing piston 1 moves upward under the action of the pressure difference; the downward sliding of the reversing piston 1 is similar, so it is not repeated. It should be particularly noted that the utility model is mainly aimed at improving how to prevent the reversing piston 1 from entering a dead point during sliding. How the entire reversing assembly realizes the reversal of the gas medium entering the motor through the reversing piston 1, and how to realize the single-degree-of-freedom sliding drive of the reversing piston 1 are all conventional technical means that can be understood by technicians in this technical field, so they will not be elaborated here.

[0023] In this embodiment, an upper end cover 10 and a lower end cover 11 are further included. The upper end cover 10 and the lower end cover 11 are respectively and correspondingly mounted on the axial upper end and the lower end of the outer cylinder 3 to close the outer cylinder 3 .

[0024] In this embodiment, the abutment assembly further includes a mounting seat 6, and the elastic member 5 and the anti-dead point steel ball 4 are both mounted on the outer cylinder 3 through the mounting seat 6. In this embodiment, the abutment assembly is evenly arranged in multiple groups along the circumferential direction. Arranging multiple groups of abutment assemblies at the same time can ensure that the steel ball 4 has sufficient force to push the guide column 2, thereby preventing the reversing piston 1 from entering the dead point, and further improving the overall performance of the motor. The elastic member 5 in this embodiment is a spring, which is arranged in the radial direction, and its elastic force is also in the radial direction.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An anti-dead point reversing assembly for a pneumatic sprayer motor, characterized in that: It includes an outer cylinder, a reversing piston and a supporting assembly, wherein the supporting assembly includes an anti-dead point steel ball and an elastic member, the reversing piston is slidably arranged on the outer cylinder, the axial end of the reversing piston is provided with a guide column extending along the axial direction, the guide column is provided with an anti-dead point protrusion, the anti-dead point steel ball is installed on the inner wall surface of the outer cylinder through the elastic member, and the anti-dead point steel ball is supported on the surface of the guide column under the action of the elastic force of the elastic member.

2. The anti-dead point reversing assembly for a pneumatic sprayer motor according to claim 1, characterized in that: The anti-dead point steel ball is arranged corresponding to the position of the anti-dead point protrusion when the reversing piston slides to the dead point position.

3. The anti-dead point reversing assembly for a pneumatic sprayer motor according to claim 1, characterized in that: The anti-dead point protrusion is composed of a supporting surface and a guiding surface, and the axial ends of the supporting surface are respectively connected to the surface of the guide column through two guiding surfaces.

4. The anti-dead point reversing assembly for a pneumatic sprayer motor according to claim 1, characterized in that: The reversing piston divides the outer cylinder into an upper chamber, a middle chamber and a lower chamber from top to bottom along the axial direction, and the guide column and the abutting assembly are both arranged in the upper chamber.

5. The anti-dead point reversing assembly for a pneumatic sprayer motor according to claim 4, characterized in that: It also includes an air inlet, an upper exhaust channel and a lower exhaust channel arranged on the outer cylinder. The upper exhaust channel is connected with the upper chamber for discharging the gas in the upper chamber, and the lower exhaust channel is connected with the lower chamber for discharging the gas in the lower chamber; the air inlet is arranged in the middle chamber for supplying gas to enter the outer cylinder.

6. The anti-dead point reversing assembly for a pneumatic sprayer motor according to claim 1, characterized in that: It also includes an upper end cover and a lower end cover, which are respectively and correspondingly mounted on the axial upper end and lower end of the outer cylinder to close the outer cylinder.

7. The anti-dead point reversing assembly for a pneumatic sprayer motor according to claim 3, characterized in that: The abutting surface is away from the surface of the guide column, and the two guide surfaces are symmetrically and tiltedly arranged.

8. The anti-dead point reversing assembly for a pneumatic sprayer motor according to claim 1, characterized in that: The abutting assembly further comprises a mounting seat, through which the elastic member and the anti-dead point steel ball are both mounted on the outer cylinder.

9. The anti-dead point reversing assembly for a pneumatic sprayer motor according to claim 8, characterized in that: The abutting components are evenly arranged in a plurality of groups along the circumferential direction.

Images