Encoder grating stripe concentric assembly device

Abstract

The present invention relates to a device for assembling concentric encoder grating stripes, wherein a ground platform is provided at the lower end of a bracket, a fine-tuning platform is provided on the ground platform, an encoder fixing assembly is provided on the fine-tuning platform, and a microscope is provided at the upper end of the bracket and connected to a display. The encoder fixing assembly includes a fixing bracket, an encoder base, an encoder pressure plate, a tightening support, a tightening shaft, and a handwheel shaft. The fixing bracket is fixed at the lower end to the fine-tuning platform, and provided at the upper end with an upper plate. The upper middle portion of the upper plate is provided with an encoder base, and the lower middle portion is provided with a tightening support. The encoder base is provided with a through hole for the encoder shaft to pass through. The tightening support is provided with a tightening shaft and a handwheel shaft for driving the tightening shaft to rotate. During assembly, the tightening shaft passes through the upper plate and abuts against the lower end of the encoder shaft. The present invention can manually drive the encoder shaft to rotate precisely and drive the grating to rotate. The grating stripes are magnified by the microscope and displayed on the display, making it convenient to adjust the grating stripes to be concentric with the encoder shaft.

Description

Technical Field

[0001] The invention relates to the technical field of encoder assembly, in particular to an encoder grating stripe concentric assembly device. Background Art

[0002] An encoder is a sensor that converts angular displacement or linear position into an electrical signal. It is an indispensable sensing device in CNC machine tools, robots, automation equipment and other fields. During the encoder assembly and production process, the concentricity of the grating stripes and the encoder shaft directly determines the encoder performance. The encoder grating stripes and the shaft are often assembled manually, but existing manual assembly devices are often complex in structure, costly, and cumbersome to operate, which affects assembly efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide an encoder grating stripe concentric assembly device, which can manually drive the encoder shaft to rotate precisely and drive the grating to rotate, and the grating stripes are magnified by a microscope and displayed on a display, making it convenient for the operator to adjust the grating stripes to be concentric with the encoder shaft, thereby achieving optimal performance assembly of the encoder.

[0004] The object of the present invention is achieved through the following technical solutions:

[0005] A device for assembling concentric encoder grating stripes comprises a bracket, a microscope, a fill light, a fine-tuning platform and an encoder fixing assembly, wherein a ground platform is provided at the lower end of the bracket, the fine-tuning platform is arranged on the ground platform, the encoder fixing assembly is arranged on the fine-tuning platform, the microscope is arranged at the upper end of the bracket, and a fill light is provided on the lens at the lower end of the microscope, and the microscope is connected to a display; the encoder fixing assembly comprises a fixing bracket, an encoder base, an encoder pressure plate, a tightening support, a tightening shaft and a handwheel shaft, wherein the lower end of the fixing bracket is fixed to the fine-tuning platform, the upper end of the fixing bracket is provided with an upper plate, and the upper middle part of the upper plate is provided with an encoder base and a tightening support is provided on the lower side, the middle part of the encoder base is provided with a through hole for the encoder rotating shaft to pass through, the tightening support is provided with a tightening shaft and a handwheel shaft that drives the tightening shaft to rotate, and during assembly, the tightening shaft passes through the upper plate and abuts against the lower end of the encoder rotating shaft.

[0006] The lower end of the tightening shaft is provided with a shaft sleeve which is sleeved on the upper end of the handwheel shaft. The middle part of the tightening shaft is provided with a threaded hole, and a tightening adjustment screw is provided in the threaded hole.

[0007] The tightening support includes an adapter sleeve and a bearing seat, wherein the upper end of the adapter sleeve is fixedly connected to the upper plate of the fixed bracket, and the lower end is fixedly connected to the bearing seat, the upper part of the handwheel shaft and the tightening shaft are both placed in the adapter sleeve, a bearing sleeve is provided in the bearing seat and is mounted on the handwheel shaft, and the lower end of the handwheel shaft is fixedly connected to a handwheel after passing through the bearing seat.

[0008] The handwheel shaft includes a main shaft portion, a bearing mounting portion and a handwheel connecting portion with successively decreasing diameters, wherein the main shaft portion is arranged in the adapter sleeve, the bearing mounting portion is arranged in the bearing seat and is fitted with a bearing, and the handwheel connecting portion is arranged on the lower side of the tightening support and is fixedly connected to the handwheel.

[0009] Two bearings are mounted on the bearing mounting portion, and there is a gap between the two bearings. The two bearing outer rings are limited by the shaft shoulders on the corresponding sides of the bearing seat. The upper side of the bearing inner ring at the upper end is limited by the stepped stop between the main shaft portion and the bearing mounting portion. The lower side of the bearing inner ring at the lower end is limited by a handwheel, and a washer is provided between the handwheel and the bearing at the lower end.

[0010] The encoder base is provided with a pressing hand wheel for fixing the encoder pressing plate.

[0011] The fixing bracket includes a bottom plate, columns and an upper plate. The bottom plate is connected to the upper plate through a plurality of columns and is fixed on the fine-tuning platform.

[0012] A vertical shaft is provided on the ground platform, a through hole is provided at one corner end of the fine-tuning platform to be sleeved on the vertical shaft, and a locking nut is provided at the upper end of the vertical shaft.

[0013] A straight line segment is drawn on the display, and when the grating stripes are concentric with the encoder shaft, the grating stripes displayed on the display are tangent to the straight line segment.

[0014] The advantages and positive effects of the present invention are:

[0015] 1. The present invention can manually drive the encoder shaft to rotate precisely and drive the grating to rotate. The grating stripes are magnified through a microscope and displayed on a monitor with straight line segments drawn on it. During the manual rotation of the grating, the tangency of the grating stripes and the straight line is observed. The grating is gently pushed while rotating to ensure that the grating stripes are always tangent to the straight line segments within a 360° circumference. At this time, the grating stripes and the encoder shaft are concentric, achieving optimal encoder performance assembly.

[0016] 2. The present invention utilizes the tightening shaft in the encoder fixing assembly to tighten against the encoder rotating shaft, and utilizes friction to drive the encoder rotating shaft to rotate. A tightening adjustment screw is provided in the threaded hole in the middle of the tightening shaft to adjust the height of the tightening shaft, thereby changing the tightening force between the tightening shaft and the encoder rotating shaft, that is, changing the friction between the tightening shaft and the encoder rotating shaft. While ensuring the rotation of the encoder rotating shaft, the use is also more flexible.

[0017] 3. The present invention realizes the rotation of the tightening shaft by the operator rotating the handwheel, and two bearings are provided at the lower end of the tightening support and are sleeved on the handwheel shaft. There is a certain gap between the two bearings, and the upper and lower limit positions of the bearings form a gap reduction trend between the two bearing inner rings, thereby eliminating the bearing clearance and avoiding axial movement when the handwheel shaft rotates, thereby ensuring the rotation accuracy of the handwheel shaft, that is, ensuring the assembly accuracy.

[0018] 4. The present invention utilizes the encoder pressure plate and the clamping handwheel to realize the rapid fixation of the encoder, and utilizes the handwheel to drive the clamping shaft to rotate, thereby driving the encoder shaft to rotate. The entire operation is simple and convenient, and the assembly efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the present invention,

[0020] Figure 2 for Figure 1 Schematic diagram of the encoder fixed component structure,

[0021] Figure 3 for Figure 2 A cross-sectional view of the encoder fixing assembly in

[0022] Figure 4 for Figure 2 Schematic diagram of the encoder fixing component usage status,

[0023] Figure 5 for Figure 4 A cross-sectional view of the upper end of the encoder fixing assembly,

[0024] Figure 6 for Figure 1 Schematic diagram of the concentric state of the grating stripes shown on the display.

[0025] Among them, 1 is the fine-tuning platform, 101 is the vertical axis, 2 is the microscope, 3 is the fill light, 4 is the bracket, 5 is the ground platform, 6 is the encoder fixing assembly, 601 is the bottom plate, 602 is the column, 603 is the upper plate, 604 is the tightening handwheel, 605 is the encoder base, 606 is the encoder pressure plate, 607 is the bearing seat, 608 is the handwheel, 609 is the adapter sleeve, 610 is the tightening shaft, 6101 is the shaft sleeve, 611 is the handwheel shaft, 6111 is the main shaft part, 6112 is the bearing mounting part, 6113 is the handwheel connecting part, 612 is the bearing, 613 is the washer, 614 is the tightening adjustment screw, 615 is the tightening support, and 616 is the fixed bracket. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] like Figure 1 As shown, the present invention includes a bracket 4, a microscope 2, a fill light 3, a fine-tuning platform 1, and an encoder fixing assembly 6. A ground platform 5 is provided at the lower end of the bracket 4, the fine-tuning platform 1 is mounted on the ground platform 5, and the encoder fixing assembly 6 is mounted on the fine-tuning platform 1. The microscope 2 is mounted at the upper end of the bracket 4, and a fill light 3 is mounted on the lens at the lower end of the microscope 2. The microscope 2 is connected to a display to feed a grating image back to the display for magnified display. The microscope 2, fill light 3, and display are all well-known in the art and are commercially available.

[0028] like Figures 2 to 5 As shown, the encoder fixing assembly 6 includes a fixing bracket 616, an encoder base 605, an encoder pressure plate 606, a tightening support 615, a tightening shaft 610 and a handwheel shaft 611, wherein the lower end of the fixing bracket 616 is fixed on the fine-tuning platform 1, the upper end of the fixing bracket 616 is provided with an upper plate 603, and the upper side of the middle of the upper plate 603 is provided with an encoder base 605 and a tightening support 615 on the lower side, the middle of the encoder base 605 is provided with a through hole for the encoder shaft to pass through, the top A tightening shaft 610 and a handwheel shaft 611 for driving the tightening shaft 610 to rotate are provided in the tightening support 615, and during assembly, the tightening shaft 610 passes through the upper plate 603 and abuts against the lower end of the encoder shaft. In this embodiment, the tightening shaft 610 is made of nylon, which has a certain elastic deformation to achieve friction while being wear-resistant. An encoder pressure plate 606 is provided on the upper side of the upper plate 603, and during assembly, the encoder is fixed to the encoder base 605 through the encoder pressure plate 606.

[0029] like Figure 3 and Figure 5As shown, the lower end of the tightening shaft 610 forms a sleeve 6101 which is sleeved on the upper end of the handwheel shaft 611. A threaded hole is provided in the middle of the tightening shaft 610, and a tightening adjustment screw 614 is provided in the threaded hole. The height of the tightening shaft 610 can be adjusted by rotating the tightening adjustment screw 614, thereby changing the tightening force between the tightening shaft 610 and the encoder shaft, that is, changing the friction between the tightening shaft 610 and the encoder shaft. Figure 3 As shown, when the tightening adjustment screw 614 is completely placed in the threaded hole in the middle of the tightening shaft 610, the sleeve 6101 is completely fitted on the handwheel shaft 611, as shown in FIG. Figure 5 As shown, the tightening adjustment screw 614 is rotated so that its lower end extends out of the threaded hole and presses against the upper end of the handwheel shaft 611. At this time, the height of the tightening shaft 610 is increased and the tightening force is increased.

[0030] like Figure 3 and Figure 5 As shown, the tightening support 615 includes an adapter sleeve 609 and a bearing seat 607, wherein the upper end of the adapter sleeve 609 is fixedly connected to the upper plate 603 of the fixed bracket 616, and the lower end is fixedly connected to the bearing seat 607, the upper part of the handwheel shaft 611 and the tightening shaft 610 are both placed in the adapter sleeve 609, and a bearing 612 is provided in the bearing seat 607 and is sleeved on the handwheel shaft 611, and the lower end of the handwheel shaft 611 passes through the bearing seat 607 and is fixedly connected to a handwheel 608. When the operator rotates the handwheel 608, the handwheel shaft 611 is driven to rotate.

[0031] like Figure 5 As shown, the handwheel shaft 611 includes a main shaft portion 6111 with successively smaller diameters, a bearing mounting portion 6112, and a handwheel connecting portion 6113, wherein the main shaft portion 6111 is arranged in the adapter sleeve 609, the bearing mounting portion 6112 is arranged in the bearing seat 607 and is fitted with a bearing 612, and the handwheel connecting portion 6113 is arranged on the lower side of the tightening support 615 and is fixedly connected to the handwheel 608. In this embodiment, two bearings 612 are included, and the two bearings 612 are not close to each other, but have a certain gap. The outer ring 612 is limited by the shoulder on the corresponding side of the bearing seat 607, and the upper side of the inner ring of the upper bearing 612 is limited by the stepped stop between the main shaft part 6111 and the bearing mounting part 6112, and the lower side of the inner ring of the lower bearing 612 is limited by the handwheel 608, and a washer 613 is provided between the handwheel 608 and the lower end bearing 612. In this way, the inner rings of the two bearings 612 are pressed and produce a movement trend with a reduced axial clearance, thereby eliminating bearing clearance, avoiding axial movement when the handwheel shaft 611 rotates, and improving assembly accuracy.

[0032] like Figure 2 and Figure 4As shown, two pressing hand wheels 604 are symmetrically provided on the encoder base 605, and the wheel shafts of the pressing hand wheels 604 are threadedly connected to the mounting holes provided on the encoder base 605, as shown in FIG. Figure 5 As shown, when the encoder is fixed, the inner side of the encoder pressure plate 606 is close to the groove on the outer circumferential surface of the encoder, and the lower end of the wheel shaft of the clamping handwheel 604 passes through the corresponding encoder pressure plate 606 and is inserted into the corresponding mounting hole on the encoder base 605. Then, the clamping handwheel 604 is rotated to make it descend and clamp and fix the encoder pressure plate 606, thereby fixing the encoder to avoid shaking.

[0033] like Figures 2 to 5 As shown, the fixed bracket 616 includes a base plate 601, columns 602 and an upper plate 603, wherein the base plate 601 is connected to the upper plate 603 through multiple columns 602 to form an integral bracket, the base plate 601 is fixed on the fine-tuning platform 1, and the tightening support 615 is arranged between each column 602.

[0034] The fine-tuning platform 1 can fine-tune the overall position of the encoder fixing assembly 6 so that the encoder grating stripes are displayed at the center of the microscope 2. Figure 1 As shown, in this embodiment, a vertical shaft 101 is provided on the ground platform 5. A through hole is provided at one corner end of the fine-tuning platform 1, which is fitted onto the vertical shaft 101. A locking nut is provided at the upper end of the vertical shaft 101. Loosening the locking nut allows the fine-tuning platform 1 to rotate. After the position is determined, the locking nut is retightened to secure the fine-tuning platform 1. The present invention can also employ fine-tuning platforms 1 of other structures as needed.

[0035] The working principle of the present invention is:

[0036] like Figures 4-5As shown, when the present invention is used, the encoder is placed in the encoder base 605 at the upper end of the encoder fixing assembly 6, and the lower end of the encoder shaft is against the upper end of the tightening shaft 610, then the inner side of the encoder pressing plate 606 is pressed against the notch on the outer circumferential surface of the encoder, and the tightening handwheel 604 is rotated to tighten and fix the encoder pressing plate 606, thereby fixing the encoder. At this time, the tightening shaft 610 has a certain elastic deformation so that it can use friction to drive the encoder shaft to rotate. The tightening force between the tightening shaft 610 and the encoder shaft can be based on Adjust as needed. When adjusting, just rotate the tightening adjustment screw 614 in the threaded hole in the middle of the tightening shaft 610 to change the height of the tightening shaft 610, thereby changing the tightening force between the tightening shaft 610 and the encoder shaft, that is, changing the friction force. After the encoder is fixed, adjust the position of the encoder fixing component 6 through the fine-tuning platform 1 so that the encoder grating stripes are displayed in the center of the microscope 2. Then the operator manually rotates the handwheel 608, and the tightening shaft 610 drives the encoder shaft to rotate through the friction force, and the encoder grating also rotates accordingly. Figure 6 As shown, the grating stripes can be fed back to the display through the microscope 2. A straight line segment is drawn on the display. The operator observes the tangency of the grating stripes and the straight line during the manual rotation of the grating. The operator gently pushes the grating while rotating it so that the grating stripes are always tangent to the straight line segment within the 360° circumference. At this time, the grating stripes are concentric with the encoder shaft, achieving optimal encoder performance assembly.

Claims

1. An encoder grating stripe concentric assembly device, characterized by: The invention comprises a bracket (4), a microscope (2), a fill light (3), a fine-tuning platform (1) and an encoder fixing assembly (6), wherein the lower end of the bracket (4) is provided with a ground platform (5), the fine-tuning platform (1) is provided on the ground platform (5), the encoder fixing assembly (6) is provided on the fine-tuning platform (1), the microscope (2) is provided at the upper end of the bracket (4), and the fill light (3) is provided on the lens at the lower end of the microscope (2), and the microscope (2) is connected to a display; the encoder fixing assembly (6) comprises a fixing bracket (616), an encoder base (605), an encoder pressure plate (606), a tightening support (615), a tightening shaft (610) and a handwheel shaft (611), wherein the lower end of a fixed bracket (616) is fixed on the fine-tuning platform (1), an upper plate (603) is provided on the upper end of the fixed bracket (616), and an encoder base (605) is provided on the upper side of the middle of the upper plate (603), and a tightening support (615) is provided on the lower side, a through hole for the encoder shaft to pass through is provided in the middle of the encoder base (605), a tightening shaft (610) and a handwheel shaft (611) for driving the tightening shaft (610) to rotate are provided in the tightening support (615), and when assembled, the tightening shaft (610) passes through the upper plate (603) and abuts against the lower end of the encoder shaft.

2. The encoder grating stripe concentric assembly device according to claim 1, characterized in that: The lower end of the tightening shaft (610) is provided with a shaft sleeve (6101) which is sleeved on the upper end of the handwheel shaft (611); a threaded hole is provided in the middle of the tightening shaft (610), and a tightening adjustment screw (614) is provided in the threaded hole.

3. The encoder grating stripe concentric assembly device according to claim 1, characterized in that: The tightening support (615) includes an adapter sleeve (609) and a bearing seat (607), wherein the upper end of the adapter sleeve (609) is fixedly connected to the upper plate (603) of the fixed bracket (616), and the lower end is fixedly connected to the bearing seat (607), the upper part of the handwheel shaft (611) and the tightening shaft (610) are both placed in the adapter sleeve (609), the bearing seat (607) is provided with a bearing (612) which is sleeved on the handwheel shaft (611), and the lower end of the handwheel shaft (611) passes through the bearing seat (607) and is fixedly connected to a handwheel (608).

4. The encoder grating stripe concentric assembly device according to claim 3, characterized in that: The handwheel shaft (611) includes a main shaft portion (6111) with successively decreasing diameters, a bearing mounting portion (6112) and a handwheel connecting portion (6113), wherein the main shaft portion (6111) is arranged in the adapter sleeve (609), the bearing mounting portion (6112) is arranged in the bearing seat (607) and is fitted with a bearing (612), and the handwheel connecting portion (6113) is arranged on the lower side of the tightening support (615) and is fixedly connected to the handwheel (608).

5. The encoder grating stripe concentric assembly device according to claim 4, characterized in that: Two bearings (612) are mounted on the bearing mounting portion (6112), and a gap exists between the two bearings (612). The outer rings of the two bearings (612) are limited by the shaft shoulders on the corresponding sides of the bearing seat (607). The upper side of the inner ring of the upper bearing (612) is limited by the stepped stop between the main shaft portion (6111) and the bearing mounting portion (6112). The lower side of the inner ring of the lower bearing (612) is limited by the handwheel (608), and a washer (613) is provided between the handwheel (608) and the lower bearing (612).

6. The encoder grating stripe concentric assembly device according to claim 1, characterized in that: The encoder base (605) is provided with a pressing hand wheel (604) for fixing the encoder pressing plate (606).

7. The encoder grating stripe concentric assembly device according to claim 1, characterized in that: The fixed bracket (616) comprises a base plate (601), columns (602) and an upper plate (603); the base plate (601) is connected to the upper plate (603) via a plurality of columns (602) and is fixedly mounted on the fine-tuning platform (1).

8. The encoder grating stripe concentric assembly device according to claim 1, characterized in that: A vertical shaft (101) is provided on the ground platform (5), a through hole is provided at one corner end of the fine-tuning platform (1) and is sleeved on the vertical shaft (101), and a locking nut is provided at the upper end of the vertical shaft (101).

9. The encoder grating stripe concentric assembly device according to claim 1, characterized in that: A straight line segment is drawn on the display, and when the grating stripes are concentric with the encoder shaft, the grating stripes displayed on the display are tangent to the straight line segment.

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