Log drilling support mechanism and log drilling equipment

Abstract

The present invention relates to a log drilling support mechanism, belonging to the technical field of log processing equipment, comprising a frame, on which a rotating assembly and a rotating drive assembly are provided, wherein the rotating assembly is used to carry logs, and the rotating drive assembly drives the rotating assembly to rotate the logs. The present invention also discloses a log drilling device, comprising a drilling assembly and the log drilling support mechanism as described above; the drilling assembly is slidably mounted on the frame, and the drilling assembly comprises a drill bit. The present invention makes it difficult for the drill bit to deviate during the log drilling process; the drill bit will not get stuck; the drilling accuracy is high, the drill bit does not deviate, the logs after drilling are of high strength and good quality, and the drilling processing defect rate is low.

Description

Technical Field

[0001] The invention relates to a log drilling support mechanism and also to a log drilling device, belonging to the technical field of log processing equipment. Background Art

[0002] There are many log support columns in wooden structures. Logs have a high moisture content. The moisture content of untreated logs is generally 60%-90%. The moisture content varies according to different factors such as wood species and origin. Undried wood cannot be used directly as support columns due to its low strength and low corrosion resistance. Logs need to be dried. There is a lot of moisture in the logs. During the drying process of the logs, the moisture on the outer surface of the logs is first released and shrinks inwards, while the moisture content in the center of the logs is still high, resulting in inconsistent shrinkage of the wood materials inside and outside the logs. A large tension is generated around the center of the logs. This tension prevents the outer surface of the wood from shrinking inwards, and eventually causes cracks to appear on the circumferential surface of the logs toward the center line. Moreover, the faster the drying, the higher the possibility of cracks, and the larger the log diameter, the more cracks there are. Therefore, log drying cannot be done by heating, and the commonly used drying method is natural air drying. However, even if the natural air-drying method is adopted, the cracking of logs cannot be completely avoided. In the actual natural air-drying process of logs, cracking of logs is very common. In addition to forming cracks on the outer surface of the logs, cracks are also formed inside the logs, which reduces the strength of the logs. In order to reduce the impact of log cracking on the subsequent application of logs, a Chinese invention patent application with publication number CN103009447A discloses a method for preventing log cracking, which is to drill a cylindrical pressure-reducing through hole on the axial center line of the log, and release moisture through the pressure-reducing through hole and the outer surface of the log at the same time, so that the inside and outside shrink in unison and cracks are not easy to occur. A Chinese invention patent with announcement number CN107283574B discloses a log drying method and equipment, which is to process at least one through hole along the length direction of the log at the center line position of the cross section of the log after the bark is removed, and use a heating rod to heat the through hole until the real-time moisture content of the wood reaches the required moisture content, and the log does not crack, thereby achieving heating and drying of the log.

[0003] The process of drilling holes inside the logs first and then drying them reduces the cracks in the logs during the drying process and solves the problem of log drying. Therefore, the logs need to be drilled in the middle before drying. The drilling process of existing log drilling equipment is generally to fix the logs, align the center line of the hole to be drilled with the drill bit, and then the drill bit is rotated while feeding toward the inside of the log. In the actual processing process, it is found that this drilling process is not suitable for logs, because the length of the log is very long, so the length of the drill bit also needs to be very long to drill through the log. When the length of the drill bit is long, the drill bit is rotating, and the gravity of the drill bit is easy to cause the drill bit to deviate. In addition, due to the growth difference of the logs, the center line of the logs is not straight, and the different wood grain textures of the logs lead to different densities. Therefore, during the drilling process of the drill bit, the drill bit is easy to deviate, resulting in a change in the rotation center line. Once the drill bit deviates, the processing center line will become more and more deviated, which may cause the drill bit to get stuck and unable to continue drilling, or even break the drill bit. Moreover, even if the drilling can be completed, the center line of the through hole is offset, which has a great impact on the strength of the subsequent finished log column and cannot be used. Therefore, a drilling device that can process log through holes is needed to ensure that the drilling center line does not deviate during the drilling process to avoid the situation where the drill bit gets stuck or breaks. Summary of the invention

[0004] In view of the above problems in the prior art, the present invention provides a log drilling support mechanism and a log drilling device to ensure that the drilling center line does not deviate during the drilling process, reduce the jamming of the drill bit, improve the drilling effect, and ensure the strength of the log after drilling.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A log drilling support mechanism comprises a frame, on which a rotating assembly and a rotating drive assembly are arranged. The rotating assembly is used to carry logs, and the rotating drive assembly drives the rotating assembly to rotate the logs.

[0007] The beneficial effects of the log drilling support mechanism of the present invention are:

[0008] First, the present invention provides a rotating assembly and a rotating drive assembly. The rotating assembly carries the log, and the rotating drive assembly drives the rotating assembly to drive the log to rotate. During the drilling process, the log rotates around the center line of the drilling hole, and the drill bit moves along the center line of the drilling hole of the log, so that the log drilling is realized. The drill bit always moves within the center line of the drilling hole, and the drill bit is not easy to deviate.

[0009] Second, when the drill bit may deflect due to differences in log density or the weight of the drill bit, the logs are constantly rotating, so once the drill bit deflects, the drill bit can be actively adjusted back at any time without causing the drill bit to get stuck.

[0010] 3. The drilling accuracy of the present invention is high and the drill bit has no deviation, which reduces the influence of the drill bit deviation on the strength and quality of the log. The log after drilling has high strength and good quality, and the defective rate of drilling processing is low.

[0011] On the basis of the above technical solution, in order to achieve the convenience of use and the stability of the equipment, the present invention can also make the following improvements to the above technical solution:

[0012] Furthermore, the rotating assembly includes a turntable and a turntable support mechanism, the turntable is rotatably mounted on the turntable support mechanism, and the turntable is used to carry logs.

[0013] The beneficial effect of adopting the above further technical solution is: the logs are carried by the turntable, and the turntable rotates on the turntable support mechanism, driving the logs to rotate.

[0014] Furthermore, the turntable support mechanism includes a base, the base is slidably mounted on the frame, a support wheel fixing frame is mounted on the base, a plurality of support wheels are evenly arranged on the support wheel fixing frame, and the turntable is rotatably mounted between the support wheels.

[0015] The beneficial effects of adopting the above further technical solution are: the base is slidably installed on the frame, and the distance of the rotating components can be adjusted to adapt to the drilling processing of logs of different lengths; the turntable is installed through the support wheel, and the support of the turntable is stable and the rotation is smoother.

[0016] Furthermore, a plurality of clamping assemblies are evenly arranged on the turntable.

[0017] The beneficial effect of adopting the above further technical solution is: the clamping assembly clamps the log to ensure the stability of the drilling process, the log will not deviate when rotating, the drilling will not deviate, and the drilling effect is good.

[0018] Furthermore, the clamping assembly includes a clamping block and a clamping block adjusting member, and the clamping block adjusting member adjusts the position of the clamping block along the radial direction of the rotating disk.

[0019] The beneficial effect of adopting the above further technical solution is that the position of the clamping block clamping the log can be adjusted by the clamping block adjusting member, thereby adjusting the rotation center of the log, so that the present invention can not only process the through hole at the center of the log, but also be suitable for processing the through hole not at the center of the log.

[0020] Furthermore, the rotary drive assembly includes a drive motor and a transmission mechanism, the transmission mechanism includes a driving wheel and a driven wheel, the driving wheel is mounted on the output shaft of the drive motor, the driven wheel is coaxially mounted on the turntable, and the driving wheel is transmission-connected to the driven wheel.

[0021] The beneficial effect of adopting the above further technical solution is: the driving motor drives the turntable to rotate.

[0022] Furthermore, there are at least two rotating components and at least one rotating drive component.

[0023] The beneficial effects of adopting the above further technical solution are: 2 or more rotating components can make the load-bearing of logs more stable, setting up one rotating drive component can reduce the power cost, and setting up multiple rotating drive components corresponding to the rotating components can make the rotation of logs more stable.

[0024] Furthermore, it also includes a feeding assembly, which includes a feeding roller and a lifting cylinder. The two ends of the feeding roller are respectively hinged on the frame and / or the rotating assembly, and the piston rod end of the lifting cylinder is hinged to the roller shaft of the feeding roller.

[0025] The beneficial effects of adopting the above-mentioned further technical scheme are: loading by feeding rollers can reduce the labor of manual loading, and the loading process is smooth, avoiding the logs from shifting during the loading process, and reducing the need to adjust the position when the logs are fixed; the lifting cylinder can adjust the height of the feeding rollers and the height of the loading, so that the present invention can be applied to the drilling processing of logs of different diameters, and can also avoid the feeding rollers interfering with the rotation of the logs.

[0026] The present invention also discloses a log drilling device, comprising a drilling assembly and the log drilling support mechanism as described above; the drilling assembly is slidably mounted on the frame, and the drilling assembly comprises a drill bit.

[0027] The beneficial effect of the log drilling equipment of the present invention is that during the drilling process, the log rotating drill bit moves within the rotation center of the log to achieve log drilling, the drill bit is not easy to deviate, the drill bit does not rotate during the movement, which can reduce energy consumption and avoid drill bit deviation caused by rotation; the drill bit rotates during the process, cooperating with the rotation of the log, which can speed up the drilling speed, improve the drilling efficiency, and also facilitate the active adjustment of the drill bit feed center line.

[0028] Furthermore, the drilling assembly also includes a drill bit driving mechanism, a main shaft and a connecting rod; the drill bit is connected to the main shaft through the connecting rod, the connecting rod is a hollow rod, a connecting hole is provided on the drill bit, the drill bit driving mechanism drives the drill bit to rotate, and the drill bit driving mechanism is connected to the main shaft in a transmission manner.

[0029] The beneficial effects of adopting the above-mentioned further technical solution are: the length of the drill bit can be extended by a connecting rod, so that the drilling assembly can be adapted to the drilling processing of logs of different lengths; the hollow connecting rod can transport gas or water to the drill bit during the drilling process, and a connecting hole connected to the connecting rod is provided at the drill bit to discharge the gas or water to the drilling processing site, and the gas or water can flush out the wood chips generated during the drilling process, thereby preventing poor chip removal and increasing the drilling speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the log drilling device of the present invention;

[0031] Figure 2 is a cross-sectional view of the log drilling apparatus of the present invention;

[0032] Figure 3 for Figure 2 A magnified image of point A;

[0033] Figure 4 is a side sectional view of a log when it is carried on a rotating assembly;

[0034] Figure 5 A cross-sectional view of a log carried on a log drilling device;

[0035] Figure 6 A schematic diagram of the log drilling process of the present invention;

[0036] Figure 7 It is a top view of the connection relationship between the rotating assembly and the rotating drive assembly of the present invention.

[0037] The accompanying drawings are marked as follows: 1. Frame; 2. Turntable; 3. Base; 4. Support wheel fixing frame; 5. Support wheel; 6. Mounting column; 7. Clamping block; 8. Screw; 9. Slot plate; 10. Driving motor; 11. Driving wheel; 12. Driven wheel; 13. Feed roller; 14. Lifting cylinder; 15. Log; 16. Drill bit; 17. Drill bit spindle motor; 18. Connecting rod; 19. Connecting rod mounting frame; 20. Spindle. DETAILED DESCRIPTION

[0038] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0039] Example 1

[0040] See also Figure 1-6 A log drilling support mechanism comprises a frame 1, on which a rotating assembly and a rotating drive assembly are provided. The rotating assembly is used to carry a log 15, and the rotating drive assembly drives the rotating assembly to drive the log 15 to rotate.

[0041] The rotating assembly includes a turntable 2 and a turntable support mechanism. The turntable 2 is rotatably mounted on the turntable support mechanism. A through hole is provided in the middle of the turntable 2, and the log 15 is installed through the through hole.

[0042] The turntable support mechanism includes a base 3, a guide rail is provided on the frame 1, a guide rail slider is provided at the bottom of the base 3, and the base 3 is slidably installed on the guide rail through the guide rail slider; a support wheel fixing frame 4 is installed on the base 3, and a through hole is provided in the middle of the support wheel fixing frame 4 for the log 15 to pass through, and a plurality of support wheels 5 are evenly provided on the support wheel fixing frame 4, and a plurality of mounting columns 6 are evenly provided on the support wheel fixing frame 4, and the support wheels 5 are mounted on the mounting columns 6 through bearings; a groove is provided on the outer side surface of the support wheel 5, and a convex ridge is provided on the outer side surface of the turntable 2, and the groove is adapted to the shape of the convex ridge, and the turntable 2 is rotatably installed between the support wheels 5.

[0043] A plurality of clamping assemblies are evenly arranged on the turntable 2, and the clamping assemblies include a clamping block 7 and a clamping block adjusting member, and the clamping block 7 and the clamping block adjusting member are installed on the turntable 2 through a slot plate 9, and the clamping block 7 is slidably installed on the slot plate 9, and the clamping block adjusting member is a screw 8, and the screw 8 is rotatably installed on the slot plate 9, and the screw 8 is threadedly connected to the clamping block 7, and the end of the screw 8 is arranged toward the rotation center of the turntable 2. Rotating the screw 8 can drive the clamping block 7 to adjust its position in the slot plate 9 along the radial direction of the turntable. The radial direction of the turntable refers to the radius direction of an imaginary circle parallel to the rotation plane of the turntable, so as to adjust the distance between the center of the log 15 and the rotation center of the turntable, and a through hole coaxial with the center of the log 15 can be processed, and a through hole not coaxial with the center of the log 15 can also be processed.

[0044] See also Figure 7 The rotary drive assembly includes a drive motor 10 and a transmission mechanism, and the transmission mechanism includes a driving wheel 11 and a driven wheel 12. The driving wheel 11 is installed on the output shaft of the drive motor 10, and the driven wheel 12 is coaxially installed on the turntable 2. A through hole is provided in the middle of the driven wheel 12 for the log 15 to pass through. The driving wheel 11 is connected to the driven wheel 12 in transmission. The rotation of the drive motor 10 drives the driving wheel 11 to rotate, the rotation of the driving wheel 11 drives the driven wheel 12 to rotate, and the rotation of the driven wheel 12 drives the turntable 2 to rotate.

[0045] There are two rotating components, which can ensure the stability of the loaded logs 15. There is one rotating drive component, which drives the turntable 2 of one of the rotating components to rotate.

[0046] It also includes a feeding assembly, which includes a feeding roller 13 and a lifting cylinder 14. Both ends of the roller shaft of the feeding roller 13 are respectively connected to hinge plates, and the other end of the hinge plate is installed on the frame 1 or the rotating assembly. The lifting cylinder 14 is installed on the frame 1 or the rotating assembly. The piston rod end of the lifting cylinder 14 is hinged to the roller shaft of the feeding roller 13. The logs 15 are placed on the feeding roller 13 and loaded onto the rotating assembly. The piston rod of the lifting cylinder 14 can be retracted to adjust the height of the feeding roller 13 to facilitate the loading of logs 15 of different diameters.

[0047] Example 2

[0048] A log drilling support mechanism, which is different from the first embodiment in that the rotating assembly is provided with one and the rotating drive assembly is provided with one. When the rotating assembly is provided with one, the height of the turntable 2 along the length direction of the log 15 can be made relatively large to ensure the stability of the log 15. The frame 1 and the rotating assembly are both provided with a feeding assembly to ensure the stability of the feeding of the log 15.

[0049] The rest is the same as Example 1 and will not be described in detail.

[0050] Example 3

[0051] A log drilling support mechanism is different from the embodiment 1 in that three rotating components are provided and one rotating drive component is provided, and the rotating drive component drives the turntable 2 of one of the rotating components to rotate.

[0052] The rest is the same as Example 1 and will not be described in detail.

[0053] Example 4

[0054] A log drilling support mechanism is different from Example 1 in that two corresponding rotary drive components are provided, the turntable 2 of each rotary component is driven to rotate by the corresponding rotary drive component, and the drive motors 10 of the two rotary drive components rotate synchronously.

[0055] The rest is the same as Example 1 and will not be described in detail.

[0056] See also Figure 1-6 A log drilling device comprises a drilling assembly and a log drilling support mechanism as described in any one of Examples 1-4; the drilling assembly is slidably mounted on the frame 1, and the log drilling support mechanism and the drilling assembly can be arranged on one frame or on respective frames.

[0057] The drilling assembly includes a drill bit 16, a spindle 20, a connecting rod 18 and a drill bit driving mechanism. The rotation center axis of the drill bit 16 is coaxial with the rotation center of the rotary disk 2. The drill bit driving mechanism includes a drill bit spindle motor 17. The drill bit spindle motor 17 is transmission-connected to the spindle 20 of the drill bit 16. The output end of the spindle 20 is transmission-connected to the drill bit 16 through a hollow connecting rod 18. The front end of the drill bit 16 is provided with a connecting hole (not shown in the figure) connected to the hollow connecting rod 18. The through hole is arranged between the cutting edges of the drill bit 16, and a plurality of connecting holes can be arranged. Preferably, a connecting hole is arranged between the cutting edges. The diameter of the connecting rod 18 is smaller than the diameter of the drill bit 16, and gas or water can be passed to the cutting position of the drill bit 16 through the connecting rod 18, so that wood chips are discharged from the outside of the connecting rod 18. The frame 1 is also provided with a connecting rod mounting frame 19, and the connecting rod 18 is rotatably mounted on the connecting rod mounting frame 19. The connecting rod 18 can be connected and lengthened by connecting multiple connecting rods 18 according to the length of the log 15 during the drilling process (see Figure 6 ).

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A log drilling support mechanism, characterized in that: It comprises a frame, on which a rotating assembly and a rotating drive assembly are arranged, wherein the rotating assembly is used to carry logs, and the rotating drive assembly drives the rotating assembly to rotate the logs; The rotating assembly comprises a turntable and a turntable support mechanism, the turntable is rotatably mounted on the turntable support mechanism, and the turntable is used to carry logs; The turntable support mechanism comprises a base, the base is slidably mounted on the frame, a support wheel fixing frame is mounted on the base, a plurality of support wheels are evenly arranged on the support wheel fixing frame, and the turntable is rotatably mounted between the support wheels; A plurality of clamping assemblies are evenly arranged on the rotary disk; the clamping assemblies include a clamping block and a clamping block adjusting member, and the clamping block adjusting member adjusts the position of the clamping block along the radial direction of the rotary disk; There are at least two rotating components and at least one rotating drive component.

2. The log drilling support mechanism according to claim 1, characterized in that: The rotary drive assembly includes a driving motor and a transmission mechanism, the transmission mechanism includes a driving wheel and a driven wheel, the driving wheel is installed on the output shaft of the driving motor, the driven wheel is coaxially installed on the turntable, and the driving wheel is in transmission connection with the driven wheel.

3. The log drilling support mechanism according to claim 1 or 2, characterized in that: It also includes a feeding assembly, which includes a feeding roller and a lifting cylinder. The two ends of the feeding roller are respectively hinged on the frame and / or the rotating assembly, and the piston rod end of the lifting cylinder is hinged to the roller shaft of the feeding roller.

4. A log drilling device, characterized in that: It comprises a drilling assembly and a log drilling support mechanism as described in any one of claims 1 to 3; the drilling assembly is slidably mounted on the frame, and the drilling assembly comprises a drill bit.

5. The log drilling device according to claim 4, characterized in that The drilling assembly also includes a drill drive mechanism, a main shaft and a connecting rod; the drill bit is connected to the main shaft via the connecting rod, the connecting rod is a hollow rod, a connecting hole is provided on the drill bit, and the drill drive mechanism is drivingly connected to the main shaft.

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