A rotary cutting automatic feeding device and a hoe handle processing machine having the same

Abstract

The present invention relates to a rotary cutting automatic feeding device and a hoe handle processing machine having the device, wherein the rotary cutting automatic feeding device controls the cutting depth of the material passing through the rotation center by changing the pressure contact position of the conical sliding groove on the upper end of the knife seat by the protruding sliding block on the inner wall of the inner ring of the feed bearing. During operation, the inner ring of the feed bearing rotates together with the knife seat mounting block fixed on the rotating sleeve, and the outer ring of the feed bearing is driven by the feeding device to change the pressure contact position of the protruding sliding block and the sliding groove, so that the present invention can cut a round bar into large and small heads or other objects with more complex curved surfaces at one time, and the structure is simple; through the setting of the clearance fit between the alignment groove on the knife seat mounting block and the alignment protrusion on the rotating sleeve, the cutter on the knife seat mounting block can have some shaking space when suddenly cutting a harder material, such as cutting a wood knot, thereby preventing the rotating sleeve from getting stuck, and the use is convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of woodworking cutting equipment, and in particular relates to a rotary cutting automatic feeding device and a hoe handle processing machine having the device. Background Art

[0002] Existing round bar machines can only perform simple round bar processing, such as a cutting mechanism for a round bar machine with application number 201920551737.0, which can only be used to process and produce wooden round bars with consistent large and small heads. However, like hoe handles, agricultural workers are accustomed to using the small head for gripping and the large head for installing the iron handle. This kind of round bar with integrated large and small heads cannot be produced and formed in one time using the above technology. Most of the existing production is for carpenters to use a plane to plane the round bar into large and small heads, which is time-consuming and labor-intensive. There are also instruments such as lathe-type machines that are used to process large and small head round bars. During processing, the two ends are aligned and fixed to rotate with the machine, and the turning tool moves from the head to the tail and slowly feeds or withdraws under human operation to form large and small head round bars. This processing method has slow processing speed, high electricity consumption, and high machinery cost. Summary of the invention

[0003] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a rotary cutting automatic feeding device, which can control the change of the cutting depth of the turning tool during rotary cutting and cooperate with the material feeding device to produce round rods with large and small heads. It has a simple structure and a fast processing speed.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a rotary cutting automatic feeding device comprises a fixed bracket, a rotating sleeve is rotatably connected in the fixed bracket, the rotating sleeve is connected to the rotary driving transmission through the driving part on the outer wall, one end of the rotating sleeve is connected to a sleeve-shaped tool holder mounting block, a tool holder is radially slidably connected to the tool holder mounting block, a feed bearing is axially slidably connected to the outer wall of the tool holder mounting block, the outer ring of the feed bearing is connected to the feeding device, a protruding sliding block is provided on the inner wall of the inner ring of the feed bearing, a side of the tool holder close to the protruding sliding block is a conical surface, a sliding groove of the protruding sliding block is provided on the conical surface, a spring mounting groove is provided on the side of the tool holder close to the rotating sleeve, a return spring is installed in the spring mounting groove, and a limiting member is provided on the tool holder mounting block corresponding to the end of the spring mounting groove close to the rotation center, the limiting member extends into the spring mounting groove and contacts with the end of the return spring close to the rotation center to limit the position.

[0005] Furthermore, an alignment groove is provided on the connecting surface between the tool holder mounting block and the rotating sleeve, and correspondingly, an alignment protrusion is provided on the rotating sleeve, and the alignment protrusion and the alignment groove are clearance-matched.

[0006] Furthermore, one end of the tool holder close to the rotation center is in the shape of an arc surface.

[0007] Furthermore, the protruding sliding block is a universal ball.

[0008] Furthermore, the limiting member is a screw, and a threaded hole is provided on the knife seat mounting block. One end of the screw passes through the threaded hole and extends into the spring mounting groove to abut against the reset spring.

[0009] Furthermore, the feeding device includes a feeding motor, a transmission screw, and a linkage driving ear. There are two transmission screws, which are symmetrically distributed on both sides of the feed bearing and on a fixed bracket. One end of the two transmission screws is connected to the feeding motor so that they are driven to rotate, and the other ends are movably connected to the linkage driving ear. The linkage driving ear is fixedly connected to the outer ring of the feed bearing.

[0010] The rotary cutting automatic feeding device based on the above-mentioned solution provides a hoe handle processing machine, and the front and rear sides of the rotary cutting automatic feeding device on the hoe handle processing machine are both provided with feeding wheel devices.

[0011] Furthermore, it also includes a central control system, which includes a processing center, a wood sensor, and a feed limit sensor. The processing center is electrically connected to the wood sensor, the feed limit sensor, and each drive.

[0012] Furthermore, the cutting edge of the cutting knife on the knife holder protrudes from the bottom edge of the arc surface by no more than 2 mm.

[0013] The beneficial effects of the present invention are:

[0014] 1. The rotary cutting automatic feeding device of the present invention controls the cutting depth of the cutter on the material passing through the rotation center by changing the pressure contact position of the conical sliding groove on the upper end of the tool holder by the protruding sliding block on the inner wall of the inner ring of the feed bearing. The inner ring of the feed bearing rotates together with the tool holder mounting block fixed on the rotating sleeve, and the outer ring of the feed bearing is driven by the feeding device to drive the feed bearing as a whole to move back and forth to change the pressure contact position of the protruding sliding block and the sliding groove, so that the present invention can cut the round rod into large and small heads or other objects with more complex curved surfaces at one time, and the structure is simple.

[0015] 2. The present invention provides clearance matching between the alignment groove on the knife seat mounting block and the alignment protrusion on the rotating sleeve, so that when the cutter on the knife seat mounting block suddenly cuts a harder material, such as a wood knot, there is some room for shaking, thereby preventing the rotating sleeve from getting stuck and facilitating use.

[0016] 3. The selection of the universal ball bearing of the present invention reduces the friction between the protruding sliding block and the sliding groove, thereby extending the service life of the present invention.

[0017] 4. The hoe handle processing machine of the present invention is designed with an arc surface at the bottom of the tool holder, and the cutting edge is restricted to not protrude more than 2 mm from the bottom edge of the arc surface. When working, it can reduce the jitter of the processed wood when it just enters the rotary cutting automatic feeding device and is only clamped and fed by the feeding wheel device at one end, thereby ensuring the cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an axial side schematic diagram of the rotary cutting automatic feeding device of the present invention.

[0019] Figure 2 for Figure 1 Exploded view of.

[0020] Figure 3 for Figure 1 Front view of .

[0021] Figure 4 for Figure 3 An enlarged view of point B.

[0022] Figure 5 for Figure 3 AA section view.

[0023] Figure 6 for Figure 5 The enlarged view is at C.

[0024] Figure 7 It is an axial side view of the tool holder of the present invention.

[0025] Figure 8 for Figure 7 Front view of .

[0026] Fig. 9 It is a structural schematic diagram of the hoe handle processing machine of the present invention.

[0027] Fig.10 yes Fig. 9 The left side partial structure view. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] Example 1

[0030] like Figure 1-Figure 6 The structure of the present invention is as follows: a rotary cutting automatic feeding device, comprising a fixed bracket 1, a rotary sleeve 2 is rotatably connected to the fixed bracket 1 through a bearing, a driving part 21 is provided on the outer wall of the rotary sleeve 2, in this embodiment, the driving part 21 is a belt groove, and a bypass hole 12 is provided at the bottom of the fixed bracket 1 corresponding to the driving part 21, a transmission belt passes through the bypass hole 12, one end is connected to the rotary sleeve 2, and the other end is connected to the rotary drive provided at the bottom of the fixed bracket 1. Figure 5As shown, the left end of the rotating sleeve 2 is bolted and fixedly connected with a sleeve-shaped tool holder mounting block 3, and the tool holder 4 is radially slidably connected to the tool holder mounting block 3. In this embodiment, the tool holder mounting block 3 is provided with four tool holder slide groove through holes evenly distributed in the circumferential direction, and the tool holder 4 is slidably connected in the tool holder slide groove through holes; a feed bearing 5 is axially slidably connected to the outer wall of the tool holder mounting block 3, and the outer ring of the feed bearing 5 is connected to the feed device 7 so as to be driven by it to move back and forth, and a protruding sliding block 6 is provided on the inner wall of the inner ring of the feed bearing 5, and the side of the tool holder 4 close to the protruding sliding block 6 is a conical surface, and a sliding groove 42 of the protruding sliding block 6 is provided on the conical surface, and the sliding groove 42 has a certain The inclination makes the cutting depth of the cutter 11 on the knife seat 4 change when the contact position of the protruding sliding block 6 and the sliding groove 42 changes; the knife seat 4 is provided with a spring mounting groove 41 on the side close to the rotating sleeve 2, and a return spring 8 is installed in the spring mounting groove 41. The end of the return spring 8 close to the rotation center is provided with a limit member 9, and the limit member 9 is fixed on the knife seat mounting block 3, so that after the return spring 8 is compressed, it can drive the knife seat 4 to return to its original position by relying on the blocking of the limit member 9. In this embodiment, the limit member 9 is a screw, and a corresponding threaded hole is provided on the knife seat mounting block 3, so that one end of the screw passes through the threaded hole and just extends into the spring mounting groove 41 to resist the return spring 8.

[0031] In this embodiment, Figure 1 As shown, the feeding device 7 includes a feeding motor 71, a transmission screw 72, and a linkage driving ear 73. There are two transmission screws 72, which are symmetrically distributed on both sides of the feeding bearing 5 and the side plates of the fixed bracket 1. The feeding motor 71 is fixed on the top plate of the fixed bracket 1. Specifically, each transmission screw 72 is rotatably connected to the fixed bracket 1 through two bearing seats, and the rear ends of the two transmission screws 72 are transmission-connected to the feeding motor 71 through a synchronous belt assembly so that they can be driven to rotate, and the front ends are movably connected with the linkage driving ear 73, and the linkage driving ear 73 is welded and fixedly connected to the outer ring of the feeding bearing 5.

[0032] When working, Figure 6 , Figure 7As shown, the rotating sleeve 2 drives the knife seat mounting block 3, the knife seat 4 and the cutting knife 11 thereon to rotate under the driving of the rotation. Due to the structural limitation of the sliding fit between the protruding sliding block 6 on the inner wall of the inner ring of the feed bearing 5 and the sliding groove 42 on the knife seat 4, the inner ring of the feed bearing 5 rotates with the rotating sleeve 2. When the feed motor 71 is started, the linkage driving ear 73 fixedly connected to the outer ring of the feed bearing 5 moves to the left, thereby driving the feed bearing 5 to move to the left as a whole. The sliding groove 42 of the knife seat 4 in this embodiment is high on the left and low on the right. Therefore, when the feed bearing 5 moves to the left, the knife seat slides downward and the cutting depth deepens. When the cutting is completed, the feed motor 71 is controlled to start in the reverse direction to drive the linkage driving ear 73 and the feed bearing 5 connected thereto to slide to the original position, waiting for the next cutting.

[0033] In some embodiments, it is easy to think that, according to the needs of rotary cutting, the number of knife seat slide slot holes on the knife seat mounting block 3 can be increased or decreased to control the number of installed cutters, but the number of cutters cannot be less than 2 and must be centrally symmetrically distributed.

[0034] As a preferred technical solution of the present design, an annular alignment groove 31 is provided on the connecting surface between the knife seat mounting block 3 and the rotating sleeve 2, and an annular alignment protrusion 22 is provided on the rotating sleeve 2 corresponding to the alignment groove 31. The alignment protrusion 22 and the alignment groove 31 are clearance-matched, so that when the cutter 11 on the knife seat mounting block suddenly cuts a harder material, such as a wood knot, there is some room for shaking, thereby preventing the rotating sleeve from getting stuck and making it smoother and more convenient to use.

[0035] As a preferred technical solution of the present design, the protruding sliding block 6 is a universal ball bearing to reduce the friction between the protruding sliding block and the sliding groove, thereby extending the service life of the present invention.

[0036] In actual applications, the size of the inner ring of the feed bearing 5 is often not satisfactory. In this embodiment, a transition inner sleeve 5a is fixedly connected to the inner ring of the feed bearing 5 to meet the requirements for the size of the inner ring of the feed bearing 5. The universal ball is installed on the inner wall of the transition inner sleeve 5a. Figure 5 Show.

[0037] Example 2

[0038] like Fig. 9 , Fig.10A hoe handle processing machine is shown, including an operating table, on which the rotary cutting automatic feeding device is arranged, and feeding wheel devices 9 are arranged on the front and rear sides of the rotary cutting automatic feeding device, and the feeding wheel device 9 includes a feeding drive and a round material bar feeding wheel group connected to the feeding drive transmission. The processed wood enters the round material bar feeding wheel group at the front end under the delivery of the worker, and enters the rotary cutting automatic feeding device under the squeezing and pushing of the round material bar feeding wheel group at this end, and the processed round material bar end enters the rear end round material bar feeding wheel group, and is finally cut and transmitted to the next process under the pulling of the rear end round material bar feeding wheel group.

[0039] The difference between the rotary cutting automatic feeding device described in this embodiment and embodiment 1 is that the feeding motor 71 is arranged on one side of the operating table, the feeding motor 71 and the two transmission screws 72 transmit power through chain drive, and the linkage driving ear 73 is located between the two bearing seats on the transmission screw 72.

[0040] In this embodiment, a central control system is also included, which includes a processing center, a wood sensor 102, and a feed limit sensor 103. The processing center is electrically connected to the wood sensor 102, the feed limit sensor 103, and each driver to obtain a signal from each sensor and control the operating state of each driver. Specifically, the feed limit sensor 103 is a proximity switch, which is arranged on the side plate of the fixed bracket 1, such as Figure 1 The wood sensor 102 is a reflective photoelectric sensor, which is arranged on the operating table and at the front end of the rotary cutting automatic feeding device, and is used to sense the presence or absence of wood; the processing center is a PLC.

[0041] As a preferred technical solution of this design, the end of the knife seat 4 close to the rotation center is in the shape of an arc surface, such as Figure 7 , Figure 8 The cutting edge of the cutter 11 on the knife holder 4 protrudes from the bottom edge of the arc surface by no more than 2mm, such as Figure 4 It is shown that the advantage of such a setting is that the raw material of the hoe handle is irregular, and the coaxiality of the two ends of the raw material is low, so that the raw material that has just entered the rotary cutting automatic feeding device and is only clamped by the feeding wheel device at one end will vibrate or deviate due to the non-coaxiality of its two ends. In the deepest cutting state, the bottom of the arc surface of the four circumferentially evenly distributed tool seats 4 forms a constructed circular sleeve, which reduces the jitter of the raw material in contact with it and has a guiding effect on the raw material that deviates in direction, thereby ensuring the cutting effect.

[0042] When in use, the log stick is Fig. 9As shown, the left end enters and is clamped by the feeding wheel device 9. When the wood sensor 102 senses the log stick, the timing starts until the log stick starts to be cut, and the processing center controls the feed motor 71 to start. It should be noted that in this embodiment, the initial position of the cutter 11 is the deepest cutting position; Figure 6 As shown in FIG. 1 , the feed bearing 5 moves to the right under the drive of the linkage drive ear 73, so that the knife seat 4 moves together with the cutter 11 to a position away from the rotation center, so that the cutting gradually becomes shallower, until the feed limit sensor 103 senses the linkage drive ear 73, and the feed motor 71 stops working. At this time, the processed hoe handle is just pulled out of the rotating cutting range by the rear end feeding wheel device 9 and is finally discharged. The feed motor 71 that has completed the processing of the log stick is reversely started under the control of the processing center, so that the cutter 11 returns to the initial deepest cutting position, that is, the limit sensor 103 at the other end of the linkage drive ear 73 senses the position of the linkage drive ear 73, waiting for the next log stick to enter, and the cycle repeats.

[0043] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A rotary cutting automatic feeding device, comprising a fixed support (1), wherein a rotary sleeve (2) is rotatably connected inside the fixed support (1), and the rotary sleeve (2) is connected to a rotary drive via a driving portion (21) on an outer wall, characterized in that: One end of the rotating sleeve (2) is connected to a sleeve-shaped knife seat mounting block (3), a knife seat (4) is radially slidably connected to the knife seat mounting block (3), a feed bearing (5) is axially slidably connected to the outer wall of the knife seat mounting block (3), the outer ring of the feed bearing (5) is connected to the feed device (7), a protruding sliding block (6) is provided on the inner wall of the inner ring of the feed bearing (5), a surface of the knife seat (4) close to the protruding sliding block (6) is a conical surface, and a sliding groove (42) of the protruding sliding block (6) is provided on the conical surface, a spring mounting groove (41) is provided on the surface of the knife seat (4) close to the rotating sleeve (2), a return spring (8) is installed in the spring mounting groove (41), and a limiting member (9) is provided on the knife seat mounting block (3) at one end corresponding to the spring mounting groove (41) close to the rotation center, and the limiting member (9) extends into the spring mounting groove (41) and conflicts with the end of the return spring (8) close to the rotation center.

2. A rotary cutting automatic feeding device according to claim 1, characterized in that: An alignment groove (31) is provided on the connection surface between the knife seat mounting block (3) and the rotating sleeve (2), and correspondingly, an alignment protrusion (22) is provided on the rotating sleeve (2), and the alignment protrusion (22) and the alignment groove (31) are clearance-matched.

3. A rotary cutting automatic feeding device according to claim 2, characterized in that: One end of the knife seat (4) close to the rotation center is in the shape of an arc surface.

4. A rotary cutting automatic feeding device according to claim 3, characterized in that: The protruding sliding block (6) is a universal ball.

5. A rotary cutting automatic feeding device according to any one of claims 1 to 4, characterized in that: The limiting member (9) is a screw, and a threaded hole is provided on the knife seat mounting block (3). One end of the screw passes through the threaded hole and extends into the spring mounting groove (41) to abut against the reset spring (8).

6. A rotary cutting automatic feeding device according to claim 5, characterized in that: The feeding device (7) comprises a feeding motor (71), a transmission screw (72), and a linkage driving ear (73). The transmission screws (72) are two in number and are symmetrically distributed on both sides of the feeding bearing (5) and on the fixed bracket (1). One end of the two transmission screws (72) is connected to the feeding motor (71) so as to be driven to rotate, and the other end is movably connected to the linkage driving ear (73). The linkage driving ear (73) is fixedly connected to the outer ring of the feeding bearing (5).

7. A hoe handle processing machine, characterized in that: A rotary cutting automatic feeding device comprising any one of claims 1 to 6.

8. A hoe handle processing machine according to claim 7, characterized in that: Feeding wheel devices (9) are provided on both the front and rear sides of the rotary cutting automatic feeding device.

9. A hoe handle processing machine according to claim 8, characterized in that: It also includes a central control system, which includes a processing center, a wood sensor (102), and a feed limit sensor (103). The processing center is electrically connected to the wood sensor (102), the feed limit sensor (103), and each drive.

10. A hoe handle processing machine according to claim 9, characterized in that: The cutting edge of the cutting knife (11) on the knife seat (4) protrudes from the bottom edge of the arc surface by no more than 2 mm.

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