Elastic pressing wheel set for wood-working machine

Abstract

The invention discloses an elastic pressing wheel set for wood-working machinery. The elastic pressing wheel set comprises a shaft rod; each elastic pressing wheel is provided with an inner shaft sleeve, an outer wheel, a plurality of springs and two cover plates, the inner shaft sleeve is detachably arranged on the shaft rod and cannot rotate relative to the shaft rod, a plurality of convex arms extend outwards from the inner shaft sleeve at equal angles, a plurality of abutting blocks extend inwards from the outer wheel in a protruding mode, and the two cover plates are arranged on the outer wheel. The abutting parts are arranged on the abutting blocks, a groove is formed between every two abutting blocks, the protruding arms extend into the grooves, the springs are arranged between the protruding arms and the abutting blocks which are opposite to each other, and the elastic reset of the springs enables the abutting parts of the abutting blocks to move towards the other protruding arms.

Description

Technical Field

[0001] The present invention relates to a woodworking machine, and particularly to an elastic pressing wheel set for a woodworking machine. Background Art

[0002] Currently known technologies for pressing wood in woodworking machines mainly use pressing wheels to press the wood moving on a conveyor belt. For example, Taiwan, China Patent No. M353813 discloses an improved structure of a conveying platform for a thin sheet planing machine. The technical focus of this case is: using a conveyor belt as a platform to convey wood, and arranging a pressing wheel above to press thin wood sheets, so that the wood sheets can be stably conveyed and fed.

[0003] The problem with the foregoing technology is that its pressing wheel can only be used to press thin wood sheets or wood sheets with a flat surface. When encountering multiple horizontally placed wooden strips with different thicknesses, or a wooden board with an uneven surface, the pressing wheel will be lifted by the thickest wooden strip and cannot press other wooden strips, or will be lifted by the highest protruding part of the wooden board and cannot press the entire wooden board. Therefore, the problem that the foregoing prior art cannot press all the wooden strips or the entire wooden board has become the subject to be solved in this case. Summary of the Invention

[0004] The main object of the present invention is to provide an elastic pressing wheel set for a woodworking machine, which can press all the wooden strips or the entire wooden board to ensure the stability of multiple wooden strips or the entire wooden board during feeding.

[0005] Another object of the present invention is to provide an elastic pressing wheel set for a woodworking machine, in which the elastic pressing wheel can be easily removed from the shaft for replacement, and the maintenance is extremely convenient.

[0006] To achieve the above object, the present invention provides an elastic pressing wheel set for woodworking machinery, comprising: a shaft; and a plurality of elastic pressing wheels. Each elastic pressing wheel has an inner shaft sleeve, an outer wheel, a plurality of springs, and two cover plates. The inner shaft sleeve is detachably disposed on the shaft and cannot rotate relative to the shaft. The inner shaft sleeve extends outwardly with a plurality of convex arms at equal angles. The outer wheel surrounds the inner shaft sleeve, and the outer wheel further protrudes inwardly at its inner edge with a plurality of abutting blocks, and a groove is formed between every two abutting blocks. Each convex arm extends into each groove. Each abutting block has an abutting portion and a setting portion located behind the abutting portion. A spring is disposed between a corresponding convex arm and the setting portion of an abutting block. The elastic restoring force of each spring is not in the radial direction of the inner shaft sleeve, but pushes the plurality of abutting blocks to separate from the corresponding convex arms facing them, and makes the abutting portions of the plurality of abutting blocks move towards another convex arm, and at least one abutting portion of the plurality of abutting blocks abuts against a convex arm; wherein, the plurality of springs are equally angularly distributed along the shaft. In the case of no external force acting, the elastic restoring forces of the plurality of springs maintain the outer wheel and the inner shaft sleeve tending to be concentric.

[0007] Wherein, each convex arm has a placing groove, each abutting block has a spring groove, and the spring groove of each abutting block is located at the setting portion of the abutting block. The two ends of each spring are respectively placed in the placing groove of a convex arm and the spring groove of an abutting block.

[0008] Wherein, a coupling groove is recessed axially on the surface of the shaft, a fitting groove is recessed on the inner edge of each inner shaft sleeve, and each inner shaft sleeve faces the coupling groove with the fitting groove; further comprising a coupling key, which is elongated, located in the coupling groove, and embedded in the fitting groove of each inner shaft sleeve.

[0009] Wherein, further comprising a plurality of spacer sleeves, sleeved on the shaft, and arranged in such a way that a spacer sleeve is disposed between two elastic pressing wheels, and both ends of each spacer sleeve respectively abut against a cover plate of two elastic pressing wheels.

[0010] Wherein, the two ends of each spring have the same caliber.

[0011] Wherein, each spring is in a shape with a gradually increasing caliber from one end to the other end.

[0012] Wherein, each cover plate is fixed to each convex arm of each inner shaft sleeve by a plurality of bolts.

[0013] Wherein, each cover plate is in a circular plate shape, and its diameter is smaller than the diameter of each outer wheel.

[0014] Wherein, the shaft has an abutting surface and a tightening nut, and the plurality of elastic pressing wheels are clamped on the shaft by the abutting surface and the tightening nut.

[0015] Wherein, the circumferential surface of the outer wheel has a plurality of convex teeth.

[0016] Thereby, the present invention can press all the wooden strips or the entire wooden board to ensure the stability of multiple wooden strips or the entire wooden board during feeding. In addition, the elastic pressing wheel of the present invention can be easily removed from the shaft for replacement, which is extremely convenient for maintenance.

[0017] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but it is not intended to limit the present invention. Description of the Drawings

[0018] Figure 1 is a perspective view of the first preferred embodiment of the present invention.

[0019] Figure 2 is a partial exploded view of the first preferred embodiment of the present invention.

[0020] Figure 3 is a schematic cross-sectional view of the first preferred embodiment of the present invention, showing the state where an elastic pressing wheel is assembled to the shaft after being cut open.

[0021] Figure 4 is a side view of the elastic pressing wheel of the first preferred embodiment of the present invention.

[0022] Figure 5 is a schematic cross-sectional view of the elastic pressing wheel of the first preferred embodiment of the present invention, showing the relationship between the outer wheel and the inner shaft sleeve, which is Figure 4 the same.

[0023] Figure 6 is a combined cross-sectional view of the first preferred embodiment of the present invention using different shafts.

[0024] Figure 7 is a combined cross-sectional view of the first preferred embodiment of the present invention using different springs.

[0025] Figure 8 is Figure 4 the action diagram of.

[0026] Figure 9 is Figure 5 the action diagram of, showing the relationship between the outer wheel and the inner shaft sleeve, which is Figure 8 the same.

[0027] Figure 10 is a schematic diagram of the operating state of the first preferred embodiment of the present invention.

[0028] Figure 11 is Figure 10 the side view schematic diagram of.

[0029] Figure 12 is the combined front view of the second preferred embodiment of the present invention.

[0030] Among them, reference numerals:

[0031] 10: Elastic pressing wheel set for woodworking machinery

[0032] 11: Shaft rod

[0033] 111: Contact surface

[0034] 112: Compression nut

[0035] 12: Coupling groove

[0036] 14: Coupling key

[0037] 21: Elastic pressing wheel

[0038] 22: Inner bushing

[0039] 221: Convex arm

[0040] 222: Insertion groove

[0041] 226: Embedded groove

[0042] 24: Outer wheel

[0043] 241: Convex tooth

[0044] 25: Contact block

[0045] 251: Groove

[0046] 252: Contact part

[0047] 253: Setting part

[0048] 254: Spring groove

[0049] 26: Spring

[0050] 28: Cover plate

[0051] 281: Bolt

[0052] 29: Spacer sleeve

[0053] 91: Woodworking machinery

[0054] 92: Conveyor belt

[0055] 99: Wood

[0056] 10’: Elastic pressing wheel set for woodworking machinery

[0057] 11’: Shaft rod

[0058] 21’: Elastic pressing wheel Detailed implementation method

[0059] To illustrate the technical features of the present invention in detail, the following preferred embodiments are given and described in conjunction with the drawings as follows, wherein:

[0060] As Figures 1 to 5 shown, the present invention will illustrate an elastic pressing wheel set 10 for woodworking machinery through a first preferred embodiment, which mainly consists of a shaft rod 11 and a plurality of elastic pressing wheels 21, wherein:

[0061] The shaft rod 11 has an engaging groove 12 recessed axially on its surface.

[0062] Each of the elastic pressing wheels 21 has an inner shaft sleeve 22, an outer wheel 24, a plurality of springs 26, and two cover plates 28. The inner shaft sleeve 22 is detachably fixed to the shaft rod 11 and cannot rotate relative to the shaft rod 11, and the inner shaft sleeve 22 extends a plurality of convex arms 221 outward at equal angles. The outer wheel 24 surrounds the inner shaft sleeve 22, and the outer wheel 24 further protrudes inward at its inner edge to extend a plurality of abutting blocks 25, and a groove 251 is formed between every two of the abutting blocks 25. Each of the convex arms 221 extends into each of the grooves 251. Each of the abutting blocks 25 has an abutting portion 252 and a setting portion 253 located behind the abutting portion 252. A spring 26 is provided between each of the convex arms 221 and the setting portion 253 of each of the abutting blocks 25. The elastic restoring force of each of the springs 26 is not in the radial direction of the inner shaft sleeve 22, but pushes the plurality of abutting blocks 25 to separate from the corresponding convex arms 221 they face, and moves the abutting portions 252 of the plurality of abutting blocks 25 towards another convex arm 221, and the abutting portion 252 of at least one abutting block 25 abuts against a convex arm 221. The circumferential surface of the outer wheel 24 has a plurality of convex teeth 241, and the plurality of convex teeth 241 can be selectively set to have a directionality and be in a form similar to a ratchet, which is beneficial to driving the wood 99 in this direction.

[0063] Among them, the plurality of springs 26 are equally angularly distributed along the shaft rod 11. In the case of no external force acting, the elastic restoring forces of the plurality of springs 26 maintain the outer wheel 24 and the inner shaft sleeve 22 tending to be concentric. In addition, the two cover plates 28 of each of the elastic pressing wheels 21 are locked to the convex arms 221 of each of the inner shaft sleeves 22 by a plurality of bolts 281, and each of the cover plates 28 is in a circular plate shape, and its diameter is smaller than the diameter of each of the outer wheels 24. And the shaft rod 11 can be provided with an abutting surface 111 and a tightening nut 112, and the plurality of elastic pressing wheels 21 are clamped by the abutting surface 111 and the tightening nut 112 and fixed to the shaft rod 11.

[0064] In this first embodiment, there are further a plurality of spacer sleeves 29 sleeved on the shaft 11 and arranged in such a manner that one spacer sleeve 29 is disposed between two of the elastic pressing wheels 21, and both ends of each spacer sleeve 29 respectively abut against a cover plate 28 of two of the elastic pressing wheels 21, thereby separating each of the elastic pressing wheels 21 by a predetermined distance.

[0065] In this first embodiment, each of the convex arms 221 has a placement groove 222, each of the abutting blocks 25 has a spring groove 254, and the spring groove 254 of each of the abutting blocks 25 is located at the setting portion 253 of the abutting block 25. Both ends of each spring 26 are respectively placed in the placement groove 222 of one of the convex arms 221 and the spring groove 254 of one of the abutting blocks 25. This way of using grooves to accommodate both ends of the spring 26 is only an example and is not used to limit the scope of the patent of this case. Other known ways of fixing the spring 26 are also covered by the scope of the patent of this case.

[0066] In addition, in this first embodiment, an engaging groove 12 is recessed axially on the surface of the shaft 11, an embedding groove 226 is recessed on the inner edge of each inner shaft sleeve 22, and each inner shaft sleeve 22 faces the engaging groove 12 of the shaft 11 with the embedding groove 226. Then, a long engaging key 14 is placed in the engaging groove 12 and embedded in the embedding groove 226 of each inner shaft sleeve 22. Thereby, the engaging key 14 can fix each inner shaft sleeve 22 on the shaft 11 and force each inner shaft sleeve 22 to rotate along with the shaft 11. However, the foregoing structure is only an example. There are also other structures that can prevent each inner shaft sleeve 22 from rotating relative to the shaft 11 but rotate along with the shaft 11. For example, as Figure 6 shown, the cross-section of the shaft 11 is not a perfect circle but has a flattened plane, and the shape of the inner edge of the inner shaft sleeve 22 conforms to that of the shaft 11, and a similar effect can be achieved.

[0067] In this first embodiment, each of the springs 26 is taken as an example with the same caliber at both ends. However, it is also possible to use, as Figure 7 shown, a spring 26 with a smaller caliber at one end and gradually increasing caliber towards the other end. This kind of spring 26 with one large end and one small end has a higher resistance to torsion and is more likely to return to its original shape after being twisted.

[0068] As Figures 8 to 9As shown, taking a single elastic pressing wheel 21, when the elastic pressing wheel 21 presses downward on an object (such as wood), the outer wheel 24 will move upward due to the action of the object until the object touches the two cover plates 28. At this time, the part of the outer wheel 24 that presses on the object itself retracts to the edge of the two cover plates 28. At this time, the plurality of springs 26 are deformed due to the force, and between the outer wheel 24 and the inner bushing 22, at least one convex arm 221 abuts against one of the abutting blocks 25 due to the action of the plurality of convex arms 221 and the plurality of abutting blocks 25. Therefore, if the shaft rod 11 is driven to rotate, the outer wheel 24 will be driven to rotate by the action of the plurality of convex arms 221 and the plurality of abutting blocks 25, and then the plurality of convex teeth 241 will abut against the object to drive the object to move.

[0069] The above has described the structure of the first embodiment. Next, the operating state of the first embodiment will be described.

[0070] As Figures 10 to 11 Cooperate with Figure 3 As shown, the elastic pressing wheel set 10 for a woodworking machine of the present invention is assembled on a woodworking machine 91. During use, a conveyor belt 92 can be used below to carry the wood 99 through, and the height of the shaft rod 11 can be adjusted so that the wood 99 can be pressed and acted upon by the plurality of elastic pressing wheels 21 when passing through. As shown in the figure, when a plurality of pieces of wood 99 are transferred by the conveyor belt 92 and enter below the plurality of elastic pressing wheels 21, the outer wheels 24 of the plurality of elastic pressing wheels 21 can press on each piece of wood 99 according to the height of each piece of wood 99 because they move relative to the inner bushing 22. In the figure, the higher piece of wood 99 will force the outer wheels 24 of the elastic pressing wheels 21 pressing on it to rise, while the lower piece of wood 99 will pass through smoothly. From this, it can also be directly understood that if the wood 99 itself is uneven, the plurality of elastic pressing wheels 21 can also automatically adapt to the surface of the wood 99 to rise and fall.

[0071] As can be seen from the above, the elastic pressing wheel set 10 for a woodworking machine of the present invention can achieve pressing on all wooden strips or the entire wooden board, ensuring the stability of the plurality of wooden strips or the entire wooden board during feeding. In addition, if one of the elastic pressing wheels 21 fails, the tightening nut 112 can be removed, and then each elastic pressing wheel 21 can be removed from the shaft rod 11. After removing the faulty one and replacing it with a new one, it can be locked back to the shaft rod 11, which is extremely convenient for maintenance. From this, it can also be understood that by using the structure of the shaft rod 11 cooperating with the coupling key 14, the user can also use other known wheel bodies to replace each elastic pressing wheel 21 and fix them on the shaft rod 11 for different uses.

[0072] As Figure 12As shown, the present invention will illustrate an elastic pressing wheel set 10' for a woodworking machine through a second preferred embodiment, which is mainly generally the same as the aforementioned first embodiment. The difference lies in that:

[0073] In this second embodiment, the plurality of spacer sleeves 29 in the first embodiment are not provided, but the plurality of elastic pressing wheels 21' are directly arranged in contact with each other and disposed on the shaft rod 11'. Such a structural arrangement is quite compact and can be applied to thinner wood materials (not shown in the figure).

[0074] The remaining structures and achievable effects of this second embodiment are generally the same as those of the aforementioned first embodiment, and will not be elaborated herein again.

[0075] As described above, the content illustrated by the present invention through the embodiments is only for reference. It cannot be used to limit the patent scope of the present invention. Any simple changes or equivalent implementations made according to the patent scope of the present invention and the content of the patent specification should be covered by the patent scope of the present invention.

[0076] Certainly, the present invention can also have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding changes and deformations should all fall within the protection scope of the claims of the present invention.

Claims

1. An elastic pressing wheel set for woodworking machinery, characterized in that: Contains: One shaft; as well as A plurality of elastic pressing wheels, each of which has an inner sleeve, an outer wheel, a plurality of springs and two cover plates, the inner sleeve being detachably arranged on the shaft and being unable to rotate relative to the shaft, and the inner sleeve extending a plurality of convex arms outward at equal angles, the outer wheel surrounding the inner sleeve, and the outer wheel further extending a plurality of abutments protruding inwardly at its inner edge, and a groove is formed between two of the abutments, each of which extends into each of the grooves, and each of which has an abutment portion and a setting portion located behind the abutment portion, and a spring is arranged between a relative convex arm and the setting portion of a abutment block, and the elastic restoring force of each of the springs is not in the radial direction of the inner sleeve, but pushes the plurality of abutments to separate from the convex arms facing them, and causes the abutment portions of the plurality of abutments to move toward another convex arm, and the abutment portion of at least one of the abutments abuts against one of the convex arms; The plurality of springs are distributed at equal angles along the shaft rod. In the absence of external force, the elastic restoring forces of the plurality of springs maintain the outer wheel and the inner sleeve to be concentric.

2. The elastic pressing wheel set for woodworking machinery according to claim 1, characterized in that: Each of the protruding arms has an insertion slot, each of the resisting blocks has a spring slot, and the spring slot of each of the resisting blocks is located at the setting portion of the resisting blocks, and each of the springs is respectively placed at the insertion slot of a protruding arm and the spring slot of a resisting block with its two ends.

3. The elastic pressing wheel set for woodworking machinery according to claim 1, characterized in that: The surface of the shaft rod is concavely provided with a coupling groove along the axial direction, and the inner edge of each inner sleeve is concavely provided with an embedding groove, and each inner sleeve faces the coupling groove with the embedding groove; it also includes a coupling key, which is long and located in the coupling groove and embedded in the embedding groove of each inner sleeve.

4. The elastic pressing wheel set for woodworking machinery according to claim 1, characterized in that: It further comprises a plurality of separation sleeves which are sleeved on the shaft and arranged in a manner of setting a separation sleeve between two elastic pressing wheels, and two ends of each separation sleeve respectively abut against one of the cover plates of the two elastic pressing wheels.

5. The elastic pressing wheel set for woodworking machinery according to claim 1, characterized in that: The diameters of the two ends of each spring are the same.

6. The elastic pressing wheel set for woodworking machinery according to claim 1, characterized in that: Each of the springs has a diameter that gradually increases from one end to the other end.

7. The elastic pressing wheel assembly for woodworking machinery according to claim 1, characterized in that: Each of the cover plates is fixed to each of the protruding arms of each of the inner sleeves by a plurality of bolts.

8. The elastic pressing wheel assembly for woodworking machinery according to claim 1, characterized in that: Each of the cover plates is in the shape of a circular plate, and its diameter is smaller than the diameter of each of the outer wheels.

9. The elastic pressing wheel set for woodworking machinery according to claim 1, characterized in that: The shaft rod has a contact surface and a clamping nut. The plurality of elastic pressing wheels are clamped on the shaft rod by the contact surface and the clamping nut.

10. The elastic pressing wheel set for woodworking machinery according to claim 1, characterized in that: The circumferential surface of the outer wheel is provided with a plurality of convex teeth.

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