Ejection device for dismounting chain wheel

Abstract

The utility model relates to the technical field of chain wheels, in particular to a chain wheel detaching and ejecting device which comprises an upper-layer plate, a lower-layer plate and a middle-layer plate located between the upper-layer plate and the lower-layer plate. The upper-layer plate and the middle-layer plate are connected through an air cylinder so as to drive the middle-layer plate to ascend and descend vertically, a pressing unit used for pressing the chain wheel is arranged on the middle-layer plate, and a window used for allowing the bearing to pass through is formed in the middle-layer plate. An ejection unit used for ejecting the bearing out is arranged on the lower layer plate located under the window. The device is simple in design and convenient to operate, ensures that normal use of the bearing or the chain wheel is not affected after the bearing and the chain wheel are detached, and is low in detaching labor intensity, time-saving and labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of sprockets, in particular to a sprocket disassembly and ejection device. Background Art

[0002] A sprocket is a wheel with toothed chain sprockets for meshing with accurately pitched blocks on a link chain or cable, a solid or spoked gear that meshes with a (roller) chain to transmit motion. Over time, wear and aging are inevitable between the sprocket and the bearing, and it is necessary to disassemble the bearing and the sprocket and replace them with new ones. The sprocket and the bearing are installed by interference fit. Currently, when disassembling and assembling the sprocket, one hand needs to hold the rod body, and the other hand uses a hammer to strike the rod body to push out the bearing in the sprocket. The disassembly and assembly time is long, the labor intensity is high, it is time-consuming and laborious, and the force is uneven, which will damage the bearing. Moreover, whether the disassembled bearing or sprocket can be reused is a problem. Content of the Utility Model

[0003] The utility model aims to solve the above defects and provides a sprocket disassembly and ejection device.

[0004] In order to overcome the defects in the background art, the technical solution adopted by the utility model to solve its technical problems is: a sprocket disassembly and ejection device, including an upper layer plate, a lower layer plate and a middle layer plate located between the upper layer plate and the lower layer plate. The upper layer plate and the lower layer plate are connected by a connecting rod. The upper layer plate and the middle layer plate are connected by a cylinder to drive the middle layer plate to move up and down. The middle layer plate is provided with a pressing unit for pressing the sprocket. A window for passing the bearing is opened on the middle layer plate, and an ejection unit for ejecting the bearing is arranged on the lower layer plate directly below the window.

[0005] Further improvement includes that the ejection unit includes a mounting seat and a ejector rod arranged on the mounting seat.

[0006] Further improvement includes that the ejector rod is detachably arranged on the mounting seat.

[0007] Further improvement includes that the ejector rod adopts a frustum structure.

[0008] Further improvement includes that the connecting rod passes through the middle layer plate to enable the middle layer plate to move up and down along the connecting rod.

[0009] Further improvement includes that the middle layer plate is provided with a positioning unit for positioning the sprocket, and the positioning units are oppositely arranged on both sides of the sprocket.

[0010] Further improvements include that the positioning unit comprises a nut, a bolt, and the positioning cylinder for being clamped between the outer teeth of the sprocket, and the bolt sequentially passes downward through the positioning cylinder and the waist-shaped hole formed in the middle plate and is threadedly connected to the nut.

[0011] Further improvements include that the pressing unit comprises a mounting part, a rotating part, and a rotating arm connected to the rotating part, which are arranged on the middle plate, and the rotating part is rotatably connected to the mounting part.

[0012] Further improvements include that a screw rod for pressing the sprocket is threadedly connected to the rotating arm.

[0013] The beneficial effect of the present utility model is that in this design, after the sprocket is pressed, the bearing is pushed out of the sprocket through the ejector rod. The operation is simple and convenient, ensuring that the normal use of the bearing or the sprocket is not affected after the bearing and the sprocket are disassembled. The disassembly labor intensity is low, saving time and effort. Description of the Drawings

[0014] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0015] Figure 1 is the front view of the present utility model;

[0016] Figure 2 is the assembly drawing of the middle plate of the present utility model;

[0017] Figure 3 is Figure 2 the D-D cross-sectional view in

[0018] Figure 4 is the front view of the pressing mechanism in the present utility model;

[0019] In the figure, 1 - lower layer plate, 2 - middle layer plate, 3 - pressing unit, 4 - cylinder, 5 - bearing, 6 - upper layer plate, 7 - sprocket, 8 - connecting rod, 9 - ejector rod, 10 - mounting seat, 11 - waist-shaped hole, 12 - positioning unit, 121 - bolt, 122 - nut, 123 - positioning cylinder, 301 - mounting part, 302 - rotating part, 303 - rotating arm, 304 - screw rod. Detailed Embodiments

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present utility model belong to the scope of protection of the present utility model.

[0021] According to Figure 1 and Figure 2 As shown, a sprocket disassembly and ejection device includes an upper layer plate 6, a lower layer plate 1, and a middle layer plate 2 located between the upper layer plate 6 and the lower layer plate 1. The upper layer plate 6 and the lower layer plate 1 are connected by a connecting rod 8. The upper layer plate 6 and the middle layer plate 2 are connected by a cylinder 4 to drive the middle layer plate 2 to move up and down. A pressing unit 3 for pressing the sprocket 7 is provided on the middle layer plate 2. A window 13 for passing the bearing 5 is opened on the middle layer plate 2. An ejection unit is provided on the lower layer plate 1 directly below the window 13. The bearing 5 in the sprocket 7 is ejected through the ejection unit, so as to disassemble the bearing 5 and the sprocket 7.

[0022] The ejection unit includes a mounting seat 10 and an ejector rod 9 provided on the mounting seat 10. The bearing 5 in the sprocket 7 is ejected through the ejector rod 9 to separate the bearing 5 and the sprocket 7. In a further embodiment, the ejector rod 9 is detachably provided on the mounting seat 10. By replacing different ejector rods 9, it is applicable to different sizes of bearings 5, thereby adjusting the contact area between the ejector rod 9 and the bearing 5. In a further embodiment, the ejector rod 9 adopts a frustum structure. This design facilitates inserting the ejector rod 9 into the inner hole of the sprocket 7 to completely eject the bearing 5.

[0023] The connecting rod 8 passes through the middle layer plate 2 to enable the middle layer plate 2 to move up and down along the connecting rod 8. The connecting rod 8 plays a guiding role for the middle layer plate 2 to ensure the stability of the middle layer plate 2 during lifting and lowering.

[0024] According to Figure 3 As shown, a positioning unit 12 for positioning the sprocket 7 is provided on the middle layer plate 2, and the positioning unit 12 is oppositely arranged on both sides of the sprocket 7. This design can be used to batch-disassemble the sprocket 7 and the bearing 5. The positioning unit 12 includes a nut 122, a bolt 121, and a positioning cylinder 123 for being clamped between the external teeth of the sprocket 7. The bolt 121 sequentially passes downward through the positioning cylinder 123 and a waist-shaped hole 11 opened on the middle layer plate 2 and is threadedly connected to the nut 122. By tightening the nut 122, the positioning cylinder 123 is pressed on the middle layer plate 2 through the bolt 121. The positioning cylinder 123 is clamped between the external teeth of the sprocket 7 to position the sprocket 7, ensuring that the bearing 5 is directly above the ejection unit. By loosening the nut 122, the bolt 121 can move in the waist-shaped hole 11 to move the positioning cylinder 123 into or out of the space between the external teeth of the sprocket 7. Through this design, sprockets 7 of various different sizes can be positioned.

[0025] According to Figure 4As shown in the figure, the pressing unit 3 includes a mounting portion 301, a rotating portion 302 disposed on the middle layer plate 2, and a rotating arm 303 connected to the rotating portion 302. The rotating portion 302 is rotatably connected to the mounting portion 301. Rotating the rotating arm 303 causes the rotating arm 303 to be located above the middle layer plate 2, preventing the sprocket 7 from moving together when the ejecting unit ejects the bearing 5 from the sprocket 7. In a further embodiment, a screw 304 for pressing the sprocket 7 is threadedly connected to the rotating arm 303, and the screw 304 is rotated to press the sprocket 7 through the screw 304.

[0026] Working principle: First, place the sprocket 7 on the middle layer plate 2. At the same time, insert the bearing 5 into the window 13. Press the sprocket 7 through the pressing unit 3. Start the cylinder 4 to drive the middle layer plate 2 to descend. After the bearing 5 moves to contact the ejector rod 9, the cylinder 4 drives the middle layer plate 2 to continue descending, and the ejector rod 9 ejects the bearing 5 from the sprocket 7. The ejected bearing 5 is picked up by the operator by hand.

[0027] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A sprocket disassembly and ejection device, characterized in that: The invention comprises an upper plate (6), a lower plate (1) and a middle plate (2) located between the upper plate (6) and the lower plate (1); the upper plate (6) and the lower plate (1) are connected via a connecting rod (8); the upper plate (6) and the middle plate (2) are connected via a cylinder (4) so ​​as to drive the middle plate (2) to move up and down; a pressing unit (3) for pressing the sprocket (7) is provided on the middle plate (2); a window (13) for passing a bearing (5) is provided on the middle plate (2); and an ejection unit for ejecting the bearing (5) is provided on the lower plate (1) directly below the window (13).

2. A sprocket disassembly and ejection device according to claim 1, characterized in that: The ejection unit comprises a mounting seat (10) and an ejector rod (9) arranged on the mounting seat (10).

3. A sprocket disassembly and ejection device as claimed in claim 2, characterized in that: The mounting seat (10) is provided with a detachable push rod (9).

4. A sprocket disassembly and ejection device according to claim 1, characterized in that: The connecting rod (8) passes through the middle plate (2) so that the middle plate (2) moves up and down along the connecting rod (8).

5. A sprocket disassembly and ejection device as claimed in claim 1, characterized in that: The middle plate (2) is provided with a positioning unit (12) for positioning the sprocket (7), and the positioning unit (12) is arranged relatively on two sides of the sprocket (7).

6. A sprocket disassembly and ejection device as claimed in claim 5, characterized in that: The positioning unit (12) comprises a nut (122), a bolt (121) and a positioning tube (123) for being inserted between the outer teeth of the sprocket (7); the bolt (121) passes downward through the positioning tube (123) and the waist-shaped hole (11) provided on the middle plate (2) in sequence and is then threadedly connected to the nut (122).

7. A sprocket disassembly and ejection device according to claim 1, characterized in that: The pressing unit (3) comprises a mounting portion (301) arranged on the middle plate (2), a rotating portion (302), and a rotating arm (303) connected to the rotating portion (302); the rotating portion (302) is rotatably connected to the mounting portion (301); and a screw rod (304) for pressing the sprocket (7) is threadedly connected to the rotating arm (303).

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