Overrunning rotary shear shank structure

Abstract

The utility model relates to an overrunning type rotary shear shank structure which comprises a supporting roller and a rotary knife rest, and one end of the supporting roller is connected with a power output shaft of a speed reducer A through an overrunning type coupler; the overrun coupling comprises a driving coupling head and a driven coupling head, a plurality of driving claw teeth and driven claw teeth which are meshed with each other are arranged at the matched ends of the driving coupling head and the driven coupling head, and the driving claw teeth abut against the rear side face of the previous driven claw tooth in the rotating direction. A gap is reserved between the driving claw tooth and the rear driven claw tooth in the rotating direction; the overrun coupling is further provided with a spring for providing thrust in the reverse direction for the driven coupling head. The overrunning type rotary shear shank is reasonable in structural design, novel in structure and high in practicability, the speed difference during cutting is eliminated by the idle stroke of the overrunning type coupler, impact in the cutting process is avoided, a speed reducer and a supporting roller are effectively protected, and the situation that the cutting length of a standard tail plate is different due to impact is avoided.

Description

Technical Field

[0001] The utility model relates to the field of rotary cutters, in particular to a transcending rotary cutter frame structure. Background Art

[0002] The cutting mechanism of the wood peeling machine consists of a rotating knife holder with a cutting knife on the upper part and a supporting roller (or PU roller) on the lower part, which are driven by two motors through a reducer. Working process: The rotation of the supporting roller follows the speed of the machine roller (equal to the board output speed), and the rotating knife holder will rotate and cut according to the length of the board to be cut (the speed is fast when cutting short boards, and the speed is slow when cutting long boards). During the cutting process, the speed of the rotating knife holder and the speed of the supporting roller are basically in an unequal speed state (basically the speed of the rotating knife holder is greater than the speed of the supporting roller).

[0003] The unequal speed drop of the rotating tool holder and the support roller will cause impact during the cutting process. This impact will be transmitted to the reducer through the coupling, causing the reducer to be easily damaged. The support roller is also easily damaged by the cutting knife, causing the support roller to be not durable. When cutting the standard tail plate, it is also easy to have different lengths due to the impact. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a transcending rotary scissor frame structure, which solves the impact problem in the cutting process, effectively protects the reducer and the support roller, and avoids the situation where the standard tail plate is cut to different lengths due to impact.

[0005] The utility model is implemented by the following scheme: an overrunning rotary scissors frame structure, comprising a support roller and a rotary scissors frame, one end of the support roller is connected to the power output shaft of a reducer A through an overrunning coupling; the overrunning coupling comprises an active coupling head and a driven coupling head, the mating ends of the active coupling head and the driven coupling head are provided with a plurality of meshing active claws and driven claws, the active claws abut against the rear side of the previous driven claw in the rotation direction, and a gap is left between the active claws and the next driven claw in the rotation direction; the overrunning coupling is also provided with a spring that provides reverse thrust for the driven coupling head.

[0006] Furthermore, the spring sleeve is arranged on the periphery of the overrunning coupling, one end of the spring is fixed to the side of the active coupling head, and the other end of the spring extends into the gap and abuts against the front side of the driven claw teeth or is fixed to the side of the driven coupling head.

[0007] Furthermore, the power output shaft of the reducer A passes through the middle of the active coupling head and is rotatably matched with the driven coupling head through a bearing.

[0008] Compared with the prior art, the utility model has the following beneficial effects: the overrunning rotary scissors frame of the utility model has reasonable structural design, novel structure, and strong practicality. The speed difference during cutting is eliminated by the idle stroke of the overrunning coupling, which solves the impact problem during the cutting process, effectively protects the reducer and the support roller, and avoids the situation where the standard tail plate is cut to different lengths due to impact.

[0009] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through specific embodiments and related drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the overrunning coupling of the utility model embodiment;

[0012] Figure 3 It is a schematic diagram of the structure of the overrunning coupling of the utility model embodiment without the active coupling head;

[0013] Explanation of the numbers in the figure: 100-support roller, 200-rotating tool holder, 300-overrunning coupling, 310-active coupling head, 311-active claw teeth, 320-driven coupling head, 321-driven claw teeth, 330-spring, 340-bearing, 350-spacer, 400-reducer A, 500-motor A, 600-motor B, 700-coupling, 800-tool holder, 900-reducer B. DETAILED DESCRIPTION

[0014] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0015] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0016] like Figures 1 to 3As shown, an overrunning rotary scissors frame structure includes a support roller 100 and a rotating knife frame 200, on which a cutting knife is installed; one end of the support roller 100 is connected to the power output shaft of the reducer A400 through an overrunning coupling 300; the overrunning coupling 300 includes an active coupling head 310 and a driven coupling head 320, and the mating ends of the active coupling head 310 and the driven coupling head 320 are provided with a plurality of meshing active claw teeth 311 and driven claw teeth 321, the active claw teeth abut against the rear side of the previous driven claw teeth in the rotation direction, and a gap 350 is left between the active claw teeth and the next driven claw teeth in the rotation direction; the overrunning coupling is also provided with a spring 330 that provides reverse thrust for the driven coupling head.

[0017] The advantage of the overrunning coupling 300 is that there is enough rotation gap between the claws of the active coupling head 310 and the driven coupling head 320. The active coupling head 310 transmits torque to the driven coupling head 320 to drive the support roller 100 to rotate. When the cutting knife on the rotating tool holder 200 cuts, the cutting knife speed is greater than the support roller speed, so the support roller can be driven to the instantaneous speed synchronization state, that is, the support roller speed is greater than the power output shaft speed of the reducer A400 (i.e., the overrunning state). At this time, due to the existence of the gap, the driven coupling head will not drive the active coupling head to overspeed rotation, and the speed difference is eliminated by the idle travel of the overrunning coupling. The idle travel after cutting is reset by the spring. This not only solves the impact of the cutting process, but also protects the support roller, and also solves the problem of different lengths of standard tailboard cutting due to impact.

[0018] The active coupling 310 and the power output shaft of the reducer A400 as well as the driven coupling 320 and the end of the support roller 100 can be connected by key connection or clamping, which is consistent with the installation method of ordinary couplings.

[0019] In this embodiment, the spring 330 is sleeved on the outer periphery of the overrunning coupling, one end of the spring is fixed to the side of the active coupling head, the side of the active coupling head is provided with a fixing hole for inserting one end of the spring, and the other end of the spring extends into the gap and abuts against the front side of the driven claw teeth. In the specific implementation process, the other end of the spring can also be directly fixed to the side of the driven coupling head, and the side of the driven coupling head is provided with a fixing hole for inserting the other end of the spring.

[0020] The spring 330 can also be arranged in another manner not shown in the figure, that is, the spring 330 uses a plurality of small springs, and the spring is arranged in the interval 350 between the active claw tooth and the driven claw tooth, and the two ends of the spring respectively press against the rear side surface of the active claw tooth and the front side surface of the driven claw tooth.

[0021] In this embodiment, the power output shaft of the reducer A400 passes through the middle of the active coupling head 310 and rotates with the driven coupling head through the bearing 340. The outer ring of the bearing 340 is tightly fitted with the inner hole of the driven coupling head, and the inner ring of the bearing 340 is tightly fitted with the power output shaft of the reducer A400.

[0022] In this embodiment, both ends of the support roller 100 and the rotating tool holder 200 are rotatably connected to the tool holder 800. One end of the rotating tool holder 100 is connected to the power output shaft of the reducer B900 through a coupling 700. The coupling 700 can be an ordinary coupling of the prior art. The power input end of the reducer B900 is coaxially connected to the main shaft of the motor B, and the power input end of the reducer A400 is coaxially connected to the main shaft of the motor A500.

[0023] Unless otherwise stated, any technical solution disclosed in the above utility model, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many feasible numerical values. Since there are too many numerical values ​​to be exhaustive, the utility model discloses only some numerical values ​​to illustrate the technical solution of the utility model, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the utility model.

[0024] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

[0025] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the above utility model include states or shapes that are approximate, similar or close thereto.

[0026] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by an integrated molding process.

[0027] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A transcending rotary shear frame structure, comprising a support roller and a rotary shear frame, characterized in that: One end of the support roller is connected to the power output shaft of the reducer A through an overrunning coupling; the overrunning coupling includes an active coupling head and a driven coupling head, and the mating ends of the active coupling head and the driven coupling head are provided with a plurality of meshing active claws and driven claws, the active claws abut against the rear side of the previous driven claw in the rotation direction, and a gap is left between the active claws and the next driven claw in the rotation direction; the overrunning coupling is also provided with a spring to provide reverse thrust for the driven coupling head.

2. The overtaking type rotary scissors frame structure according to claim 1 is characterized in that: The spring sleeve is arranged on the periphery of the overrunning coupling, one end of the spring is fixed to the side of the active coupling head, and the other end of the spring extends into the gap and abuts against the front side of the driven claw teeth or is fixed to the side of the driven coupling head.

3. The overtaking type rotary scissors frame structure according to claim 1 is characterized in that: The power output shaft of the reducer A passes through the middle of the active coupling head and is rotatably matched with the driven coupling head through the bearing.

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