Adjustable stroke device with cam
阅读说明:本技术 具有凸轮的可调冲程装置 (Adjustable stroke device with cam ) 是由 斯科特·S·麦克莱恩 于 2019-08-30 设计创作,主要内容包括:可调冲程机构具有壳体,壳体具有中心轴和限定空腔的壁。至少一个配重可移动地至少部分地设置在空腔内。安装组件至少部分地设置在空腔内。安装组件具有工件连接机构。冲程调节器耦合至少一个配重与安装组件。冲程调节器能使配重和安装组件相对于彼此移动,从而配重和安装组件之间的距离可以可变地调整,进而,相对于壳体的中心轴可变地调整工作连接机构的冲程半径。(The adjustable stroke mechanism has a housing having a central axis and a wall defining a cavity. At least one counterweight is movably disposed at least partially within the cavity. The mounting assembly is at least partially disposed within the cavity. The mounting assembly has a workpiece attachment mechanism. A stroke adjuster couples the at least one counterweight and the mounting assembly. The stroke adjuster enables the counterweight and the mounting assembly to move relative to each other such that a distance between the counterweight and the mounting assembly can be variably adjusted, thereby variably adjusting a stroke radius of the work attachment relative to a central axis of the housing.)
1. An adjustable stroke mechanism for a random access rail machine, comprising:
a housing having a central axis and walls defining a cavity;
at least one counterweight movably disposed at least partially within the cavity;
a mounting assembly disposed at least partially within the cavity, the mounting assembly including a workpiece attachment mechanism;
a stroke adjuster coupling the at least one counterweight and the mounting assembly, the stroke adjuster enabling the at least one counterweight and mounting assembly to move relative to each other such that a distance between the at least one counterweight and the mounting assembly is variably adjustable, thereby variably adjusting a stroke radius of the workpiece connection mechanism relative to the central axis of the housing.
2. The adjustable stroke mechanism of claim 1, wherein the stroke adjuster includes an adjustment ring surrounding the wall of the housing, the adjustment ring being axially movable along the central axis and rotatable about the central axis, and a cam mechanism.
3. The adjustable stroke mechanism of claim 2 wherein the counterweight engages the cam mechanism for moving the counterweight in response to cam motion.
4. The adjustable stroke mechanism of claim 2 wherein the mounting assembly includes a bearing bracket engaging the cam mechanism for moving the mounting assembly in response to cam movement.
5. The adjustable stroke mechanism of claim 1, the workpiece attachment mechanism further comprising a spindle extending through the bearing housing and into the counterweight.
6. The adjustable stroke mechanism of claim 5 further comprising at least one bearing surrounding the main shaft and disposed within the bore of the bearing housing.
7. The adjustable stroke mechanism of claim 2 further comprising a locking mechanism associated with the cam mechanism to lock the workpiece attachment mechanism.
8. The adjustable stroke mechanism of claim 7 wherein the cam mechanism further comprises at least one leaf spring engaging a slot in the hub for locking the stroke adjuster.
9. A method of adjusting the stroke of a random access rail machine, comprising:
coupling an adjustable stroke mechanism to a random access rail machine, the adjustable stroke mechanism comprising:
a housing having a central axis and walls defining a cavity;
at least one counterweight movably disposed at least partially within the housing;
a back plate mounting assembly at least partially disposed within the housing, the back plate mounting assembly including a workpiece connection mechanism;
a stroke adjuster coupling the at least one counterweight and the mounting assembly;
adjusting the stroke adjuster;
moving the counterweight and mounting assembly relative to each other;
variably adjusting a distance between the counterweight and the mounting assembly; and
the stroke radius of the mechanism is variably adjusted relative to the central axis of the housing.
10. A rotary tool, comprising:
a housing and an electric motor, the electric motor including a transmission system;
an adjustable stroke mechanism coupled to the drive train, the adjustable stroke mechanism comprising:
a stroke adjuster having a wall defining a cavity;
at least one counterweight movably disposed at least partially within the cavity;
a mounting assembly disposed at least partially within the cavity, the mounting assembly including a workpiece attachment mechanism;
the stroke adjuster couples the at least one counterweight and the mounting assembly, the stroke adjuster enabling the at least one counterweight and the mounting assembly to move relative to each other such that a distance between the at least one counterweight and the mounting assembly is variably adjustable, thereby variably adjusting a stroke radius of the workpiece connection mechanism relative to the drive train.
11. The rotary tool of claim 10, wherein the stroke adjuster comprises a cam for moving the at least one weight relative to the mounting assembly.
12. The rotary tool of claim 11, wherein the stroke adjuster wall engages the cam for movement.
13. An adjustable stroke mechanism comprising:
a stroke adjuster having a wall defining a cavity;
at least one counterweight movably disposed at least partially within the cavity;
a mounting assembly disposed at least partially within the cavity, the mounting assembly including a workpiece attachment mechanism;
the stroke adjuster couples the at least one counterweight and the mounting assembly, the stroke adjuster enabling the at least one counterweight and the mounting assembly to move relative to each other such that a distance between the at least one counterweight and the mounting assembly is variably adjustable, thereby variably adjusting a stroke radius of the workpiece attachment mechanism relative to the drive train.
14. The adjustable stroke mechanism of claim 13, wherein the stroke adjuster includes a cam for moving the at least one weight relative to the mounting assembly.
15. The adjustable stroke mechanism of claim 14 wherein the stroke adjuster wall engages the cam for movement.
16. The adjustable stroke mechanism of claim 14 wherein the counterweight engages the cam mechanism for moving the counterweight in response to cam motion.
17. The adjustable stroke mechanism of claim 14 wherein the mounting assembly includes a bearing bracket engaging the cam mechanism for moving the mounting assembly in response to cam movement.
18. The adjustable stroke mechanism of claim 14 further comprising a locking mechanism associated with the stroke adjuster to lock the drive spindle.
Technical Field
The present application relates to adjustable rail apparatus including, but not limited to, polishers, buffers, sanders, and massagers.
Background
The present application relates to methods and apparatus for adjusting strokes on random orbital machines such as, but not limited to, polishing machines, sanders, and massagers. This adjustment enables a user to define the stroke of the random orbital machine and adjust the stroke between a maximum defined stroke setting and a minimum zero orbital setting.
Polishers and sanders are routinely used in the automotive and domestic construction industries to correct flaws in paint or drywall, and for polishing and waxing. There are three main machines used: including rotary buffers (rotarybuffers), random orbiters, and dual-action machines (dual action machines). Since the method of screwing the shim onto each machine is unique and is used for different purposes, each tool has its own location.
The rotary buffer machine is the fastest and most efficient machine in terms of a control method with good results for removing paint defects. The control units in the rotary buffer machine are directly connected to the shims and are axially aligned with each other. To correct the paint scratch, a rotary buffer is typically used to remove enough paint around the scratch to level the surface. However, removing scratches requires more skill and control over the machine than is available in conventional hobbies. For this reason, the rotary buffer machine is generally avoided from use by ordinary users because it very easily removes excess paint, and because of the rotary marks finally formed or the polishing damage caused by burning the paint.
The introduced random track machine meets the requirements of ordinary users because it requires less experience and control over the operation. Random orbiters use a gearbox that employs two independent mechanisms for attaching the spacer to the back plate. Unlike rotary buffer machines, random orbital machines set the central rotational axis of the shim and back plate offset from the drive shaft of the machine. This bias is commonly referred to as "stroke". Thus, the back plate and shim orbit (orbit) in a circular motion about the drive shaft. Meanwhile, since the spacer is mounted on the idle bearing (idle bearing), the spacer can be arbitrarily rotated. This random rotation varies with the pressure exerted on the gasket and is not directly powered. The result is that the burnishing motion does not burn or cut the paint because it cannot generate heat from the powered rotating motion. Thus, the random orbital machine is very safe and obviously unlikely to cause paint to swirl or be burned.
Similar to the random orbiter, the dual motive machine offsets the center rotational axis of the spacer and the backing plate from the drive axis. As a result of this stroke, the back plate and the spacer rotate in a circular motion about the drive shaft. However, for a dual motor, the rotation of the spacer is not directly powered.
The heart of a random orbital machine is the stroke of the machine. The stroke is determined by the offset between the drive shaft and the backing shaft. The greater the offset or stroke, the further the backing plate is rotated from the drive shaft. The offset is multiplied by two to obtain the stroke diameter. Thus, "stroke" is a term that indicates the diameter of the passageway of the backing plate as it rotates about the drive shaft.
Most random orbital machines are small stroke machines, meaning that they have a stroke length measured somewhere between about 6mm and 12 mm. The small stroke machine limits the movement of the shims to a smaller, tighter track. This results in a smooth motion. The small stroke machine is also easier to control because the back plate rotates on a tighter path about the drive shaft axis of rotation. The machine is easier to maintain due to the smoother motion, less vibration and motion.
The large stroke machine outputs increased back plate revolutions per minute (OPM) with the same Revolutions Per Minute (RPM) because the back plate and spacer rotation about the drive shaft increases. The large stroke also increases the motion of the pad, which helps to spread the polishing compound and treat a larger surface area. It also enables more cutting to be applied to the paint, which allows for the correction of scratches and paint defects. Small stroke machines typically polish only the paint without cutting into it and therefore cannot remove surface defects.
One way to address the small stroke drawback is to increase the rotational speed (RPM) of the machine. Although this increases the rotation of the motor, the machine stroke remains unchanged. There are also life issues associated with increased RPM of the motor and increased OPM of the spacer. Increasing RPM produces more strain on the motor, while increasing OPM combustion pad is faster.
In summary, both long stroke and short stroke machines have their own niches in industry. What is needed, therefore, is a machine that can be adjusted by a user without the need for special tools or disassembly of the machine. Finally, what is needed is a compact, simple and efficient method to adjust the stroke of the machine according to the needs of the user.
Disclosure of Invention
According to the present disclosure, an adjustable stroke mechanism for a random access rail machine includes a housing having a central axis and a wall enclosing a cavity. At least one counterweight is movably disposed within the cavity. The mounting assembly is disposed within the cavity. The mounting assembly includes a workpiece attachment mechanism. A stroke adjuster couples the at least one counterweight and the mounting assembly. The stroke adjuster can move the counterweight and the mounting assembly relative to each other so that a distance between the counterweight and the mounting assembly is variably adjusted. This therefore variably adjusts the stroke radius of the workpiece attachment mechanism relative to the central axis of the housing. The stroke adjuster includes an adjustment ring and a cam mechanism. An adjustment ring surrounds the housing wall. The adjustment ring is axially movable along the central axis. In addition, the adjustment ring is rotatable about the central axis. The counterweight engages the cam mechanism to move the counterweight in response to the cam motion. A mounting assembly including a bearing bracket engages the cam mechanism to move the mounting assembly in response to cam movement. The workpiece connection mechanism further comprises a bearing shaft. The bearing shaft extends through the housing, through the bearing bracket and into the counterweight. At least one bearing surrounds the bearing shaft and the at least one bearing is disposed within the bore of the bearing housing. The cam mechanism further comprises at least one spring. At least one of the reeds engages a slot in the hub for locking the stroke adjuster.
According to a second embodiment, a method of adjusting the stroke of a random access orbital machine includes coupling an adjustable stroke mechanism. It includes an adjustable stroke mechanism for a random access rail machine, including a housing having a central axis and a wall enclosing a cavity. At least one counterweight is movably disposed within the cavity. The mounting assembly is disposed within the cavity. The mounting assembly includes a workpiece attachment mechanism. A stroke adjuster couples the at least one counterweight and the mounting assembly. The stroke adjuster can move the counterweight and the mounting assembly relative to each other so that a distance between the counterweight and the mounting assembly is variably adjusted. This therefore variably adjusts the stroke radius of the working connection relative to the central axis of the housing. The stroke adjuster moves axially relative to the central axis of the housing. The stroke adjuster rotates about a central axis of the shaft. The counterweight and the mounting assembly move relative to each other. The distance between the counterweight and the mounting assembly is variably adjustable. The stroke radius of the workpiece attachment mechanism is variably adjustable relative to the central axis.
Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
Drawings
The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.
Fig. 1 is a perspective view of a tool.
Fig. 2 is a partially cut-away perspective view of fig. 1.
Fig. 3 is an exploded perspective view of fig. 1.
Fig. 4 is a cross-sectional view of fig. 1 taken along line 4-4.
Fig. 5 is a cross-sectional view of fig. 1 taken along line 5-5.
Fig. 6 is a cross-sectional view of fig. 1 taken along line 6-6.
Fig. 7 is a perspective view of the cam plate of fig. 1.
Fig. 8 is a perspective view of the tool.
Fig. 9 is a partially cut-away perspective view of fig. 5.
Fig. 10 is an exploded perspective view of fig. 1.
Fig. 11A is a cross-sectional view of fig. 8 in a first position.
Fig. 11B is a cross-sectional view of fig. 8 in a second position.
Fig. 12 is a cross-sectional view of fig. 1 taken along line 12-12.
Fig. 13 is a cross-sectional view of fig. 1 taken along line 13-13.
Fig. 14 is a perspective view of the cam plate of fig. 8.
Fig. 15 is a bottom plan view of the regulator.
Fig. 16 is a cross-sectional view of fig. 15 taken along line 16-16.
Fig. 17 is a cross-sectional view of fig. 15 taken along line 17-17.
Detailed Description
Exemplary embodiments will now be described more fully with reference to the accompanying drawings.
Turning to the drawings, a tool is shown having an adjustable stroke arrangement and is designated by the reference numeral 10. The tool 10 includes a
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Turning to fig. 8-17, a second embodiment is shown. Reference numerals for similar elements are continued to be used and increased by 200.
A tool having an adjustable stroke device is indicated by
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Once the rotation is complete, the user releases the
The foregoing description of the embodiments has been presented for purposes of illustration and description. This is not meant to be exhaustive or limiting of the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in alternative embodiments, even if not specifically shown or described. This situation can also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
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