A device for continuously and automatically dropping logs or profiles at fixed distances

Abstract

The present invention discloses a device for continuously and automatically dropping logs or profiles at a fixed distance. A log feeding mechanism for transporting logs or profiles to a log sawing mechanism is mounted on a frame, and a log sawing mechanism is arranged next to the mechanism, and the log sawing mechanism is used to saw the logs or profiles; a plurality of log clamping structures are installed on the conveying chain of the log feeding mechanism, and each log clamping structure is used to clamp a log or profile; a mechanical control structure is arranged between the sprockets driving the master and slave shafts and the conveying chain, and the mechanical control structure is connected to each log clamping structure through the mechanical control structure, so as to drive the automatic clamping and clamping of the logs or profiles. The present invention can continuously, automatically and efficiently process log wood sections, effectively reduce cutting resistance, energy consumption, noise pollution and mechanism vibration, multiply improve the efficiency and automation level of wood section sawing processing, and ensure processing accuracy. The present invention is also suitable for automatic and efficient fixed-distance dropping processing of various profiles of metal materials and non-metal materials.

Description

Technical Field

[0001] The invention relates to a log fixed-distance dropping device, in particular to a log continuous automatic fixed-distance dropping device. Background Art

[0002] Traditional log-spacing equipment is generally a woodworking circular saw, or a cross-section circular saw. The circular saw blade is mounted on the spindle and driven by an electric motor to perform a rotating cutting motion. The wood can be fed manually or mechanically (rollers, chain rails, conveyor belts, and sports cars, etc.). The cutting resistance varies greatly, the energy consumption is high, the production efficiency is low, the yield is low, and the processing quality is unstable. In addition, hand-held electric chain saws and hand-held oil-driven chain saws are commonly used. Although they are easy to carry and use, the wood section quality is low, the loss is large, and the length precision control effect is poor. Woodworking frame saws are also called gang saws. Multiple saw blades are tensioned side by side on the saw frame, and the crank-connecting rod mechanism drives the reciprocating cutting motion. The spacing between adjacent saw blades is the thickness of the processed board. The logs are fed continuously or intermittently by the feeding cart and the pressure roller. According to the structural layout, frame saws can be divided into vertical and horizontal types. Frame saws have high processing accuracy and productivity, and are suitable for processing high-quality logs with uniform diameters, but they cannot be sawed reasonably for log defects. Due to the thicker saw blades, the yield is lower than that of band saws. Summary of the invention

[0003] In view of the problems and shortcomings of the above-mentioned technology, the purpose of the present invention is to provide a device for continuously and automatically dropping logs at a fixed distance, which can automatically process logs into wood segments of the same length according to the set length, with high processing efficiency and precision.

[0004] The technical solution adopted by the present invention is:

[0005] The invention comprises a frame, a log sawing mechanism and a log feeding movement mechanism. The log feeding movement mechanism is installed on the frame. A log sawing mechanism is arranged beside the log feeding movement mechanism. The log feeding movement mechanism is used to transport logs or profiles to the log sawing mechanism. The log sawing mechanism is used to saw the logs or profiles.

[0006] The log sawing mechanism comprises a lower spindle, an upper spindle, a pulley, a spindle bearing, a spindle coupling, a spindle motor, a band saw blade and a saw blade adjustment mechanism. The upper spindle and the lower spindle are respectively arranged in parallel up and down, and pulleys are mounted on the upper spindle and the lower spindle. A belt transmission connection is formed between the pulleys of the upper spindle and the lower spindle through the band saw blade, and a saw blade adjustment mechanism for adjusting the band saw blade is provided on the band saw blade; both ends of the upper spindle and the lower spindle are supported and installed by spindle bearings, and one end of the lower spindle is coaxially connected to the output shaft of the spindle motor via the spindle coupling.

[0007] The log feeding motion mechanism comprises a driving active shaft, a driving driven shaft, a sprocket, a conveyor chain, a driving shaft coupling and a driving shaft motor; the driving active shaft and the driving driven shaft are arranged horizontally and parallelly at intervals, and sprockets are mounted on the driving active shaft and the driving driven shaft, and a chain transmission connection is formed between the sprockets of the driving active shaft and the driven shaft through a conveyor chain, both ends of the driving active shaft and the driven shaft are supported and installed by bearings, and one end of the driving active shaft is coaxially connected to the output shaft of the driving shaft motor through the driving shaft coupling.

[0008] A plurality of log clamping structures are installed on the conveyor chain of the log feeding motion mechanism, each log clamping structure is used to clamp a log or a profile, a mechanical control structure is arranged between the sprockets of the driving active shaft and the driving driven shaft and the upper and lower chains of the conveyor chain, and the mechanical control structure is connected to each log clamping structure passing through the mechanical control structure, driving the log clamping structure to automatically clamp the log or the profile.

[0009] It comprises a plurality of log feeding movement mechanisms, which are arranged in parallel at intervals, and each set of log clamping structures of the plurality of log feeding movement mechanisms is located on the same horizontal line perpendicular to the transport direction of the logs or profiles to form a group of log clamping groups, on which one log or profile is placed.

[0010] The mechanical control structure includes a guide support frame, an upper pull rod group, a lower guide positioning pull rod and a guide clamping pull rod assembly. The guide support frame is located between the sprockets of the driving active shaft and the driving driven shaft and the upper and lower chains of the conveying chain. The guide support frame is fixed to the frame, and the upper and lower sides of the guide support frame are rollingly connected to the rollers of the conveying chain. The lower guide positioning pull rods are fixedly installed on the two side surfaces of the lower part of the guide support frame, and a group of upper pull rod groups are fixedly installed on the two side surfaces of the upper part of the guide support frame. Each group of upper pull rod groups includes two upper guide positioning pull rods arranged on the same side surface of the upper part of the guide support frame and at the upstream and downstream ends along the transportation direction, and a guide clamping pull rod between the two upper guide positioning pull rods; both ends of the guide clamping pull rod are connected to the guide support frame through a waist drum groove matching structure so as to be movable up and down and horizontally, and multiple locations of the guide clamping pull rods are elastically connected to the upper end of the guide support frame through the guide clamping pull rod assembly.

[0011] The guide clamping pull rod assembly comprises a compression spring, a spring positioning block and a spring positioning pin. The side of the guide support frame is fixedly mounted with a spring positioning block. The top surface of the guide clamping pull rod is provided with a groove. The spring positioning pin and the compression spring are both inserted into the groove of the guide clamping pull rod and connected to the bottom of the groove of the guide clamping pull rod. The spring positioning pin is placed in the groove on the top surface of the guide clamping pull rod. A compression spring is sleeved between the spring positioning block and the spring positioning pin.

[0012] The waist drum groove matching structure includes a horizontal waist drum groove opened on the guide clamping pull rod, a vertical waist drum groove opened on the guide support frame, and a hinge pin. The hinge pin is installed through the horizontal waist drum groove and the vertical waist drum groove at the same time, and the end is axially limited by a retaining ring, so that the guide clamping pull rod and the guide support frame can move up and down and horizontally relative to each other at the same time in the matching guide of the horizontal waist drum groove and the vertical waist drum groove.

[0013] Each set of log clamping structure includes a base and a pair of symmetrically arranged clamping plate assemblies arranged on the base, each clamping plate assembly includes two clamping components arranged on the base on both sides symmetrically along the transportation direction, each clamping component includes a mobile clamp, a Y-shaped push rod, a fixed support, an L-shaped guide support, an L-shaped support, a slider, a tension spring and a rolling bearing. A fixed support is fixedly installed on the outer side of the base, and a mobile clamp is slidably installed on the inner side of the base. A Y-shaped push rod is provided between the mobile clamp and the fixed support. The lower end of the Y-shaped push rod passes through the base and is connected to the mechanical control structure via a rolling bearing.

[0014] An L-shaped support is fixedly installed on the bottom surface of the base below the fixed support, a boss is provided in the middle of the bottom of the movable clamp and is embedded in the straight groove of the base to form a guide slide, and an L-shaped guide support is installed on the top plane of the boss, and the L-shaped support and the L-shaped guide support are respectively located on both sides of the lower end of the Y-shaped push rod; the tops of the L-shaped support and the L-shaped guide support are fixed to the base, and the bottom sides of the L-shaped support and the L-shaped guide support are provided with horizontal dovetail grooves, and a slider is slidably embedded in each horizontal dovetail groove, and the L-shaped support and the slider at the bottom of the L-shaped guide support are elastically connected by a tension spring, so that the slider is respectively close to the two vertical sides of the push rod at the lower end of the Y-shaped push rod, and the bottom of the L-shaped support and the L-shaped guide support clamp the Y-shaped push rod under the action of the tension spring.

[0015] The upper end of the Y-shaped push rod is an inverted triangle, and the movable fixture and the fixed support are provided with triangular notches at the upper part of the side surface connected to the Y-shaped push rod to form a fixture inclined surface and a support inclined surface respectively, so that a wedge surface contact fit is formed between the upper end of the Y-shaped push rod and the support inclined surface of the fixed support and the fixture inclined surface of the movable fixture, and the wedge surface contact fits at the two places are symmetrically arranged on both sides of the Y-shaped push rod;

[0016] The sides of the inverted triangle on both sides of the upper end of the Y-shaped push rod are provided with inclined grooves, and the support inclined surface of the fixed support and the clamp inclined surface of the movable clamp are embedded in the inclined grooves with clearance matching.

[0017] The rolling bearing component includes a pin, a rolling bearing, a nut and a bushing. The lower end of the Y-shaped push rod after passing through the base is coaxially fixed to one end of the pin through a nut. The other end of the pin passes through the pin threaded hole and the bushing at the lower end of the Y-shaped push rod in sequence and is fastened to the inner ring of the rolling bearing. When each set of log clamping structure runs to the guide clamping rod, the rolling bearing is located under the guide clamping rod and is rollingly connected to the bottom surface of the guide clamping rod.

[0018] The present invention has the following beneficial effects:

[0019] The present invention can continuously and automatically process logs efficiently, effectively reducing cutting resistance, energy consumption, noise pollution and mechanism vibration, doubling the efficiency and automation level of log sawing, and ensuring processing accuracy. The present invention is also suitable for automatic and efficient fixed-distance blanking processing of various profiles of metal and non-metal materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional overall schematic diagram of an embodiment of the present invention.

[0021] Figure 2 The log sawing mechanism of the embodiment of the present invention is composed of a layout and Figure 3 AA cross-section diagram of .

[0022] Figure 3 It is a schematic diagram of the plan layout of the log sawing mechanism and the log feeding motion mechanism according to an embodiment of the present invention.

[0023] Figure 4 It is a two-dimensional assembly view of the base in the log feeding motion mechanism, mechanical control structure and log clamping structure of the embodiment.

[0024] Figure 5 It is a three-dimensional schematic diagram of the base.

[0025] Figure 6 It is a partial two-dimensional assembly view of the log clamping structure and the mechanical control structure.

[0026] Figure 7 yes Figure 6 A top sectional view of .

[0027] Figure 8 It is a three-dimensional schematic diagram of a Y-shaped push rod.

[0028] Fig. 9 yes Figure 6 BB section view.

[0029] Fig.10 yes Figure 6 CC section view.

[0030] Fig.11 yes Figure 6DD section view.

[0031] Fig.12 It is a schematic diagram of the log clamping structure of the present invention.

[0032] In the figure: 1, lower spindle, 2, upper spindle, 3, pulley, 4, spindle bearing, 5, frame, 6, spindle coupling, 7, spindle motor, 8, support bearing, 9, band saw blade, 10, saw blade adjustment mechanism, 11, driving active shaft, 12, driving driven shaft, 13, sprocket, 14, conveyor chain, 15, bearing, 16, driving shaft coupling, 17, driving shaft motor; 18, П-shaped outer chain plate, 19, base, 20, mobile fixture, 21, Y-shaped push rod, 22, pin shaft, 23, rolling bearing, 24, fixed support, 25, L-shaped guide support, 26, L-shaped support, 27, slider, 28, spring pull pin, 29, tension spring, 30, hexagon socket screw Ⅰ, 31, base straight groove, 32, countersunk hole, 33, Support threaded hole, 34, threaded hole, 35, boss Ⅰ, 36, pin threaded hole, 37, inclined groove, 38, fixture inclined surface, 39, support inclined surface, 40, log or profile, 41, vertical side of push rod, 42, nut, 43, bushing, 44, hexagon socket screw Ⅱ, 45, hexagon socket screw Ⅲ, 46, screw, 47, guide support frame, 48, upper guide positioning rod, 49, lower guide positioning rod, 50, boss Ⅱ, 51, through hole, 52, connecting rod, 53, guide clamping rod, 54, hinge pin, 55, compression spring, 56, spring positioning block, 57, spring positioning pin, 58, hexagon socket screw Ⅳ, 59, hexagon socket screw Ⅴ, 60, horizontal waist drum groove, 61, vertical waist drum groove, 62, retaining ring. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] like Figure 1 As shown, it includes a frame 5, a log sawing mechanism and a log feeding movement mechanism. The log feeding movement mechanism is installed on the frame 5. A log sawing mechanism is provided next to the log feeding movement mechanism. The log feeding movement mechanism is used to transport logs or profiles 40 to the log sawing mechanism. The log sawing mechanism is used to saw the logs or profiles 40.

[0035] In the specific implementation, multiple log sawing mechanisms and multiple log feeding motion mechanisms can be included simultaneously. Each log feeding motion mechanism is provided with a log sawing mechanism near the output side, and the band saw blade 9 of the log sawing mechanism is located beside the conveying chain 14 of the log feeding motion mechanism.

[0036] like Figure 2As shown, the log sawing mechanism includes a lower spindle 1, an upper spindle 2, a pulley 3, a spindle bearing 4, a spindle coupling 6, a spindle motor 7, a band saw blade 9 and a saw blade adjustment mechanism 10. The upper spindle 2 and the lower spindle 1 are respectively arranged in parallel up and down, the upper spindle 2 is located above the log feeding movement mechanism, and the lower spindle 1 is located below the log feeding movement mechanism. The upper spindle 2 and the lower spindle 1 are both coaxially fixed with pulleys 3, and a belt transmission connection is formed between the pulleys 3 of the upper spindle 2 and the lower spindle 1 through the band saw blade 9. The band saw blade 9 is provided with a saw blade adjustment mechanism 10 for adjusting the direction of the band saw blade 9; both ends of the upper spindle 2 and the lower spindle 1 are supported and installed on the frame 5 through spindle bearings 4, both ends of the pulley 3 are provided with spindle bearings 4, and one end of the lower spindle 1 is coaxially connected to the output shaft of the spindle motor 7 through the spindle coupling 6.

[0037] In a specific implementation, multiple log sawing mechanisms may be included. The upper spindles 2 / lower spindles 1 of the multiple log sawing mechanisms use the same shaft, that is, share a common shaft. The upper spindles 2 / lower spindles 1 between adjacent pulleys 3 are supported and installed on the frame 5 through support bearings 8.

[0038] In a specific implementation, the upper spindle 2 / lower spindle 1 of the log sawing mechanism is arranged horizontally in a manner not strictly perpendicular to the transport direction of the log feeding motion mechanism, so that the load of the overall operation of the multiple log sawing mechanisms is reduced and the stability is improved.

[0039] like Figure 3 As shown, the log feeding motion mechanism includes a driving active shaft 11, a driving driven shaft 12, a sprocket 13, a conveying chain 14, a driving shaft coupling 16 and a driving shaft motor 17; the driving active shaft 11 and the driving driven shaft 12 are respectively arranged horizontally and parallelly at intervals on the lower upstream side along the transportation direction, the driving active shaft 11 is located on the downstream side along the transportation direction, and the driving driven shaft 12 is located on the upstream side along the transportation direction, the driving active shaft 11 and the driving driven shaft 12 are both coaxially fixed with a sprocket 13, and the sprockets 13 of the driving active shaft 11 and the driving driven shaft 12 are connected by a chain transmission through the conveying chain 14, both ends of the driving active shaft 11 and the driving driven shaft 12 are supported and installed on the frame 5 through bearings 15, and one end of the driving active shaft 11 is coaxially connected to the output shaft of the driving shaft motor 17 through the driving shaft coupling 16.

[0040] In a specific implementation, a plurality of log feeding motion mechanisms may be included, and the driving active shafts 11 and the driving driven shafts 12 of the plurality of log feeding motion mechanisms adopt the same shaft, that is, share a common shaft.

[0041] like Figure 4 and Figure 7As shown, a plurality of log clamping structures are installed on the conveyor chain 14 of the log feeding motion mechanism, and each set of log clamping structures is used to clamp a log or a profile 40. A mechanical control structure is arranged between the sprockets 13 of the driving active shaft 11 and the driving driven shaft 12 and the upper and lower chains of the conveyor chain 14. The mechanical control structure is connected to each log clamping structure passing through the mechanical control structure, driving the log clamping structure to automatically clamp the log or the profile 40.

[0042] In a specific implementation, it may include a plurality of log feeding movement mechanisms, the plurality of log feeding movement mechanisms are arranged in parallel at intervals, and each set of log clamping structures of the plurality of log feeding movement mechanisms is located on the same horizontal line perpendicular to the transport direction of the logs or profiles to form a group of log clamping groups, a log or profile 40 is placed on a group of log clamping groups, so that the log or profile moves along the transport direction.

[0043] Such a plurality of log feeding motion mechanism is composed of a pair of horizontally parallel arranged driving shafts, several pairs of sprocket wheels installed on the driving shafts, and several conveying chains meshing with the sprocket wheels.

[0044] Each conveyor chain passes through the band saw blades running up and down at the corresponding position. Each conveyor chain has several sets of log clamping structures evenly distributed along the circumference direction. A set of log clamping structures is installed at the same position of each conveyor chain in the direction of the log axis. A set of mechanical control structures that automatically clamp and loosen the log clamping structure during operation is installed in the vertical area between the inner side of each conveyor chain and the sprockets meshing with it. The sprockets and conveyor chains are combined to rotate and control the log clamping structure to automatically clamp before the log is sawed and automatically loosen after the log is sawed. The logs fall into the clamping mechanisms that are evenly distributed along the circumference direction of the conveyor chain and arranged side by side on each conveyor chain in turn and are automatically clamped. At this time, the log axis is parallel to the axis of the drive shaft of the log feeding motion mechanism. Driven synchronously by several conveyor chains, the logs are fed at a uniform speed and continuously and automatically cut and cut at a fixed distance.

[0045] like Figure 1 , Figure 4As shown, the mechanical control structure includes a guide support frame 47, an upper pull rod group, a lower guide positioning pull rod 49 and a guide clamping pull rod assembly. The guide support frame 47 is located between the sprocket 13 of the driving active shaft 11 and the driving driven shaft 12 and the upper and lower chains of the conveying chain 14. The guide support frame 47 is fixed to the frame 5, and the upper and lower sides of the guide support frame 47 are rollingly connected to the rollers of the conveying chain 14. The lower two sides of the guide support frame 47 are symmetrically fixedly installed with horizontal strips of lower guide positioning pull rods 49, and the upper two sides of the guide support frame 47 are symmetrically fixedly installed with a group of upper pull rod groups, each group of upper pull rods The group includes two upper guide positioning rods 48 in the form of horizontal strips arranged on the same side of the upper part of the guide support frame 47 and at the upstream and downstream ends along the transportation direction, and a guide clamping rod 53 between the two upper guide positioning rods 48. The upper guide positioning rod 48 is positioned and fixed on the side of the guide support frame 47 by a hexagon socket screw IV58; both ends of the guide clamping rod 53 are connected to the guide support frame 47 through a waist drum groove matching structure so that they can be moved up and down and horizontally, and multiple parts of the guide clamping rod 53 are elastically connected to the upper end of the guide support frame 47 through the guide clamping rod assembly.

[0046] A through hole 51 is formed on the guide support frame 47 , and a connecting rod 52 passes through the through hole 51 to fix the guide support frame 47 on the frame 5 .

[0047] The upper and lower sides of the guide support frame 47 are rollingly connected to the rollers of the conveyor chain 14. Specifically, Fig.10 As shown, the upper and lower sides of the guide support frame 47 are both provided with stepped bosses II50 , the width of the boss II50 is smaller than the inner width of the inner chain link of the conveying chain 14 , and the top surface of the boss II50 supports the outer circle of the roller connected to the conveying chain 14 .

[0048] Both ends of the guide clamping rod 53 are processed with rounded structures, and both ends of the guide clamping rod 53 form a clearance fit with the upper guide positioning rod 48. Specifically, a groove can be set between the upper guide positioning rod 48 and the guide support frame 47, and the rounded structures at both ends of the guide clamping rod 53 can be movably embedded in the groove.

[0049] The guide clamping rod assembly includes a compression spring 55, a spring positioning block 56 and a spring positioning pin 57. Fig.11 As shown, a spring positioning block 56 is fixedly installed on the side of the guide support frame 47 by a hexagon socket screw V59, and a compression spring 55 is sleeved between the spring positioning block 56 and the spring positioning pin 57; a groove is provided on the top surface of the guide clamping pull rod 53, and the spring positioning pin 57 and the compression spring 55 are both extended into the groove of the guide clamping pull rod 53 and connected to the bottom of the groove of the guide clamping pull rod 53;

[0050] The waist drum groove matching structure includes a horizontal waist drum groove 60 opened on the guide clamping rod 53, a vertical waist drum groove 61 opened on the guide support frame 47, and a hinge pin 54. The hinge pin 54 is simultaneously passed through the horizontal waist drum groove 60 and the vertical waist drum groove 61 for installation, and the end portion is axially limited by a retaining ring 62, so that the guide clamping rod 53 and the guide support frame 47 can simultaneously move up and down relative to each other and move horizontally relative to each other in the matching guidance of the horizontal waist drum groove 60 and the vertical waist drum groove 61.

[0051] like Figure 6 , Figure 7 and Fig.12 As shown, each set of log clamping structure includes a base 19 and a pair of symmetrically arranged clamping plate assemblies arranged on the base 19. The pair of clamping plate assemblies are symmetrically arranged along a vertical plane passing through the axis of the log or profile 40 / along a plane perpendicular to the transportation direction.

[0052] Each clamping plate assembly includes two clamping components which are symmetrically arranged on the base 19 on both sides along the transport direction, and the clamping components on both sides are symmetrically arranged on the vertical plane where the conveyor chain 14 is located; the logs or profiles are clamped between the moving clamps 20 of the clamping components on the two bases 19 of a pair of clamping plate assemblies of the same set of log clamping structure.

[0053] Each clamping component on each side includes a mobile clamp 20, a Y-shaped push rod 21, a fixed support 24, an L-shaped guide support 25, an L-shaped support 26, a slider 27, a tension spring 29 and a rolling bearing. The fixed support 24 is fixedly installed on the outer side of the base 19 near the center between the two clamping components by a screw 46. The screw 46 passes through the support threaded hole 33 and the threaded hole 34 of the base 19 to fix the fixed support 24 on the base 19. The mobile clamp 20 that can slide along the transportation direction is slidably installed on the inner side of the center between the two clamping components on the base 19. A Y-shaped push rod 21 is provided between the mobile clamp 20 and the fixed support 24. The lower end of the Y-shaped push rod 21 passes through the base 19 and is connected to the mechanical control structure through a rolling bearing.

[0054] Specifically, Figure 5 As shown, a horizontal base straight groove 31 is opened on the base 19, and a boss Ⅰ35 is provided at the bottom of the movable fixture 20. The boss Ⅰ35 is embedded in the base straight groove 31 so that a sliding fit is formed between the base 19 and the movable fixture 20.

[0055] The bottom surface of the base 19 below the fixed support 24 is fixedly installed with an L-shaped support 26 by means of a hexagon socket screw III 45. A boss I 35 is provided in the middle of the bottom of the movable fixture 20 and is embedded in the base straight groove 31 of the base 19 to form a guide slide. The top plane of the boss I 35 is fixedly installed with an L-shaped guide support 25 by means of a hexagon socket screw II 44. The L-shaped support 26 and the L-shaped guide support 25 are respectively located on both sides of the lower end of the Y-shaped push rod 21 after passing through the base 19; the tops of the L-shaped support 26 and the L-shaped guide support 25 are fixed to the bottom by means of a hexagon socket screw III 45. The bottom sides of the seat 19, the L-shaped support 26 and the L-shaped guide support 25 are all provided with horizontal dovetail grooves, and a slider 27 is slidably embedded in each horizontal dovetail groove. The slider 27 is slidably embedded in the horizontal dovetail groove and can move horizontally. The slider 27 at the bottom of the L-shaped support 26 and the L-shaped guide support 25 is elastically connected by a tension spring 29, so that the bottom of the L-shaped support 26 and the L-shaped guide support 25 clamps the lower end of the Y-shaped push rod 21 under the action of the tension spring 29, and the slider 27 is respectively close to the two vertical side surfaces 41 of the lower end of the Y-shaped push rod 21.

[0056] like Fig. 9 and Fig.12 As shown, spring pull pins 28 are fixedly provided on the sides of the slider 27 at the bottom ends of the L-shaped support 26 and the L-shaped guide support 25, and a tension spring 29 is connected between the spring pull pin 28 of the slider 27 at the bottom ends of the L-shaped support 26 and the L-shaped guide support 25, that is, the two ends of the tension spring 29 are respectively connected to the spring pull pin 28 of the slider 27 at the bottom end of the L-shaped support 26 and the spring pull pin 28 of the slider 27 at the bottom end of the L-shaped guide support 25.

[0057] like Figure 8 As shown, the upper end of the Y-shaped push rod 21 is an inverted triangle, and the movable fixture 20 and the fixed support 24 are provided with triangular notches at the upper part of the side surface connected to the Y-shaped push rod 21 to form a fixture inclined surface 38 and a support inclined surface 39, respectively, so that a wedge surface contact fit is formed between the upper end of the Y-shaped push rod 21 and the support inclined surface 39 of the fixed support 24 and the fixture inclined surface 38 of the movable fixture 20, and the wedge surface contact fits at the two places are symmetrically arranged on both sides of the Y-shaped push rod 21;

[0058] The sides of the inverted triangle on both sides of the upper end of the Y-shaped push rod 21 are provided with inclined grooves 37, and the support inclined surface 39 of the fixed support 24 and the clamp inclined surface 38 of the movable clamp 20 are respectively inserted into the inclined grooves 37 of the waist edges of the inverted triangle on both sides of the upper end of the Y-shaped push rod 21 with clearance fit.

[0059] like Fig.10As shown, the lower end of the Y-shaped push rod 21 passes through the base 19 and is connected to the bottom surface of the guide clamping rod 53 of the mechanical control structure through the rolling bearing component. The rolling bearing component includes a pin 22, a rolling bearing 23, a nut 42 and a bushing 43. The lower end of the Y-shaped push rod 21 after passing through the base 19 is coaxially fixed with one end of the pin 22 through the nut 42. An external thread can be set on one end of the pin 22. The other end of the pin 22 passes through the pin threaded hole 36 and the bushing 43 at the lower end of the Y-shaped push rod 21 in sequence and is fastened to the inner ring of the rolling bearing 23. When each set of log clamping structure runs to the guide clamping rod 53, the rolling bearing 23 is located below the guide clamping rod 53 and is rollingly connected to the bottom surface of the guide clamping rod 53.

[0060] The rolling bearings 23 of the rolling bearing members of the clamping components on the base 19 located on both sides symmetrically in the transport direction are respectively located and connected to the bottom surfaces of the guide clamping rods 53 on both sides of the guide support frame 47.

[0061] The base 19 is fixedly connected to the conveying chain 14 via the П-shaped outer link plate 18 , and each П-shaped outer link plate 18 is connected to two chain links of the conveying chain 14 ; the conveying chain 14 drives the base 19 and the clamping plate assembly thereon to move along with the conveying chain 14 .

[0062] Specifically, Figure 5 As shown, a countersunk hole 32 is opened on the base 19, and the hexagon socket screw I 30 passes through the countersunk hole 32 and is connected to the I-shaped outer link plate 18, so that the base 19 is fixed on the I-shaped outer link plate 18.

[0063] Each set of log clamping structures clamps a section of a log or profile 40, and the section of the log or profile 40 is clamped between the moving clamps 20 of a pair of clamping plate assemblies of the log clamping structure.

[0064] When the logs or profiles 40 are driven by the log clamping structure to move along the conveyor chain 14 and pass through the guide clamping rod 53, the rolling bearings 23 in the rolling bearing parts of the clamping components on both sides of the clamping plate assembly of each set of log clamping structure are closely connected to the bottom surfaces of the guide clamping rods 53 connected to both sides of the guide support frame 47 in real time.

[0065] Normally, the guide clamping rod 53 moves downward relative to the guide support frame 47 under the action of gravity and the downward spring force of the compression spring 55 and under the limitation of the waist drum groove matching structure, thereby pressing down the rolling bearing 23 and driving the Y-shaped push rod 21 to move downward. The Y-shaped push rod 21 drives the moving clamp 20 to move toward the center of the log clamping structure through the wedge surface contact between the moving clamp 20 and the Y-shaped push rod 21, that is, to move the log or profile 40 clamped between the two clamping plate assemblies of the log clamping structure, thereby achieving the log or profile 40 being clamped by the moving clamp 20 of the two clamping plate assemblies.

[0066] At the same time, if the gravity of the logs or profiles 40 on the upstream and downstream sides along the transportation direction is uneven, or if there are vibrations and bumps in transportation, the two clamping plate assemblies of the log clamping structure will be subjected to unequal forces in real time, causing the base 19 of the log clamping structure to tilt, and the clamping plate assembly on the lower side of the base 19 to be subjected to greater force. The moving clamp 20 of the clamping plate assembly here will drive the Y-shaped push rod 21 to move upward through the wedge surface contact between the moving clamp 20 and the Y-shaped push rod 21, and then drive the guide clamping rod 53 to move upward through the contact between the rolling bearing 23 and the bottom surface of the guide clamping rod 53, and then compress the compression spring 55 between the guide clamping rod 53 and the spring positioning block 56, and then compress the spring 55 to generate a larger downward feedback force for balance, thereby balancing the uneven force of the logs or profiles 40 during transportation.

[0067] like Figure 1 , Figure 2 In a specific implementation, an upper spindle 2 and a lower spindle 1 arranged in parallel up and down are provided in a vertically arranged log sawing mechanism. Four pulleys 3 are installed at a distance S in the middle of the lower spindle 1. Spindle bearings 4 are installed at both ends of the lower spindle 1. Support bearings 8 are installed between each pulley and are fixed on a frame 5. A spindle coupling 6 and a spindle motor 7 are installed at one end thereof. Four upper spindles 2 are arranged according to the number and axial position of the pulleys installed on the lower spindle 1. A pulley 3 is installed in the middle of each upper spindle 2 and spindle bearings 4 are installed at both ends. The bearings are installed on the frame 5 and the shaft spacing between the upper and lower spindles can be adjusted by adjusting the upper and lower positions of the bearings.

[0068] like Figure 3The projection of the axis of each upper spindle 2 on the horizontal plane overlaps with the axis of the lower spindle 1, and the projection of the axis of the upper and lower spindles on the horizontal plane is at an angle α to the log feeding movement direction V and at an angle θ to the axis of the log feeding drive shaft or the axis of the log, α+θ=90°, and the axis of the log is perpendicular to the log feeding movement direction; a band saw blade 9 is installed between each pair of pulleys 3 of the upper and lower spindles, and the distance between each group of upper and lower spindles is adjusted by adjusting the upper and lower positions of the spindle bearings 4 on each upper spindle 2 separately, and the adjustment Control the tension of each band saw blade, effectively avoiding the adverse consequences of sawing caused by inconsistent tension of each band saw blade due to errors in component processing and assembly; each band saw blade is equipped with a pair of saw blade adjustment mechanisms 10 on the left and right sides of the area between the upper and lower pulleys. The band saw blade 9 passes through the outer rings of a pair of rolling bearings arranged in parallel to form rolling friction. Through the horizontal rotation and movement adjustment of the pair of rolling bearings, the band saw blade 9 is twisted by an angle α to make the width direction of the band saw blade consistent with the log feeding movement direction V. The horizontal lateral spacing between the same band saw blades and between adjacent band saw blades in the direction perpendicular to the log feeding direction V or parallel to the log axis is the set spacing and is equal. The set spacing is equal to the axial length L of the log after it is cut into wood sections, L = S / 2×sinα = S / 2×cosθ. During operation, the spindle motor 7 drives the spindle coupling 6 → the lower spindle 1 → the pulleys 3 on the lower spindle 1 → the band saw blades 9 → the pulleys 3 on the upper spindle 2 → the four upper spindles 2 to run at high speed.

[0069] like Figure 1 , Figure 3 The horizontally arranged log feeding mechanism is provided with a pair of horizontally parallel driving shafts 11 and driven shafts 12. Seven pairs of sprockets 13 and seven conveyor chains 14 meshing with the sprockets 13 are installed one by one at the same axial position of the driving shafts 11 and the driven shafts 12. Bearings 15 are installed at both ends of the driving shafts 11 and the driven shafts 12 and fixed on the frame 5. A driving shaft coupling 16 and a driving shaft motor 17 are installed at one end of the driving shaft 11; the axial spacing between the sprockets 13 on the driving shafts 11 and the driven shafts 12 is equal and equal to the axial length L of the log after it is cut into wood sections.

[0070] The conveyor chain 14 can be a special roller chain. Figure 4 , Fig. 9On the basis of the standard roller chain, an outer chain plate 18 with a cross section of Π-shaped is installed every other standard outer chain plate. The upper plane of the outer chain plate has four threaded holes for installing the log clamping structure components. Each conveyor chain 14 horizontally and longitudinally passes between the band saw blades 9 running up and down at the corresponding horizontal and horizontal positions. When working, the drive shaft motor 17 at the end of the driving shaft 11 drives the drive shaft coupling 16 → drives the driving shaft 11 → drives the sprockets 13 on the driving shaft 11 → each conveyor chain 14 (including the log clamping structure installed on the chain) → drives the sprockets 13 on the driven shaft 12 → drives the driven shaft 12 to run at a uniform speed.

[0071] The automatic log clamping mechanism comprises a log clamping structure and a mechanical control structure.

[0072] like Figure 1 , Figure 4-Figure 8 , Fig.10 Each conveyor chain 14 has 9 sets of log clamping structures evenly distributed and installed at the same horizontal position along the circumference direction.

[0073] Each set of log clamping structure comprises a pair of clamping plate assemblies symmetrically arranged along the vertical plane of the axis of the log or profile 40, and the clamping plate assemblies have clamping parts inside. In each clamping component, four hexagon socket screws Ⅰ30 are connected through four countersunk holes 32 in the middle of the base 19 to connect the four threaded holes on the upper plane of the Π-shaped outer chain plate 18 to fix the base 19 on the upper plane of the Π-shaped outer chain plate 18 of the conveyor chain 14. Four screws 46 are connected to the four support threaded holes 33 of the base 19 to fix the fixed support 24 on the upper plane of the base 19. There is a boss Ⅰ35 in the middle of the bottom of the mobile clamp 20 along the circumference direction of the conveyor chain, which is embedded in the straight groove 31 of the base and forms a clearance fit in the width direction. The top plane of the boss Ⅰ35 is fixedly installed with an L-shaped guide support 25 by two hexagon socket screws Ⅱ44. The width of the guide support is greater than the width of the boss Ⅰ35 of the mobile clamp, and the parts on the left and right sides that exceed the width of the boss form a clearance fit with the lower plane of the base 19. In this way, when the mobile clamp 20 moves and clamps along the straight groove 31 of the base, it can withstand the reaction force of the log on the mobile clamp to prevent the mobile clamp 20 from overturning. Figure 6 , Figure 7 , Fig. 9 .

[0074] The Y-shaped push rod 21 is located between the fixed support 24 and the movable clamp 20, and the two symmetrical inclined surfaces on the upper part thereof are provided with inclined grooves 37. The movable clamp 20 and the upper clamp inclined surface 38 and the support inclined surface 39 of the fixed support 24 are respectively embedded in the inclined grooves 37 of the Y-shaped push rod 21 to form a clearance fit, and the lower part thereof passes through the straight groove 31 of the base and forms a clearance fit with the straight groove in the thickness direction. The pin 22 is horizontally connected to the pin threaded hole 36 at the lower part of the Y-shaped push rod 21 through the external thread at the shaft end and is locked with a nut 42. The pin 22 is provided with a rolling bearing 23 and a bushing 43. Under the action of the mechanical control structure, the Y-shaped push rod 21 is pulled downward to guide and push the movable clamp 20 to face the movable clamp 20 in the clamping component on the other side arranged symmetrically through the above-mentioned mutually contacting and matching inclined grooves 37, the clamp inclined surface 38 and the support inclined surface 39 to clamp the log or profile 40, such as Figure 1 , Figure 6 , Figure 7 , Figure 8 , Fig.10 The lower plane of the base 19 and the position corresponding to the fixed support 24 are fixedly installed with an L-shaped support 26 by two hexagon socket screws III 45. The L-shaped support 26 and the vertical position of the L-shaped guide support 25 are respectively provided with a horizontal dovetail groove at the same height position. The dovetail grooves are respectively provided with sliders 27. The exposed vertical side surfaces of the sliders 27 parallel to the bottom surface of the dovetail grooves are respectively provided with a spring pin 28. A tension spring 29 is provided between the spring pins 28, so that the trapezoidal end surface of the slider 27 on one side is always closely attached to the two vertical side surfaces 41 of the push rod in the vertical direction at the lower part thereof during the up and down movement of the Y-shaped push rod 21, so as to reduce the impact of the Y-shaped push rod 21 on the mechanism during the operation process, and prevent the Y-shaped push rod 21 from being downwardly separated from the clamping component under the action of centrifugal force and its own gravity when the clamping structure runs to the lower part of the circumference of the conveying sprocket 13, so as to ensure the reliable operation of the mechanism. Figure 1 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.11 All parts in the log clamping structure and their installation positions and assembly relationships are arranged symmetrically with respect to the central vertical plane in the width direction of the conveyor chain.

[0075] like Figure 1 , Figure 4 , Figure 6 , Figure 7 , Fig.10 , Fig.11A mechanical control structure is installed in the vertical space between the upper and lower chains of each conveyor chain 14 and between the pair of sprockets 13 meshing therewith. In the mechanical control structure, the upper guide positioning rod 48, the lower guide positioning rod 49, and the guide clamping rod assembly are arranged symmetrically along the vertical plane of the center of the thickness direction of the guide support frame 47, and the upper guide positioning rod 48 and the lower guide positioning rod 49 are fixed on the vertical planes on the left and right sides of the guide support frame 47 by hexagon socket screws IV58. The guide support frame 47 is provided with bosses II 50 on the upper and lower sides, and the width of bosses II 50 is ≤ the inner width of the inner link of the conveyor chain. The top surface of bosses II 50 supports the outer circle of the roller of the conveyor chain 14, guides and supports the conveyor chain 14 to run. The middle part of the guide support frame 47 is provided with grooves arranged symmetrically along the vertical plane of the center in the thickness direction. The parallel guide support frames 47 are connected to form a whole by connecting rods 52 passing through six through holes 51 in the center of their grooves horizontally and fixed on the frame 5. One end of the pin 22 has a step to prevent the rolling bearing 23 from detaching, and the step is embedded in the groove in the middle of the guide support frame 47 to run with the log clamping structure. The guide clamping rod assembly is located in the middle area of ​​a pair of upper guide positioning rods 48 in the horizontal direction. The guide clamping rod assembly on the guide support frame of each conveyor chain is located in the horizontal direction of the upper guide positioning rod 48, and changes with the position of each band saw blade 9 starting and ending when sawing logs.

[0076] In the guide clamping rod assembly, the two ends of the guide clamping rod 53 in the horizontal direction are arc-shaped bosses, the thickness of which is half the thickness of the upper guide positioning rod 48 and is embedded in the vertical groove formed by the end of the upper guide positioning rod 48 and the vertical surface of the guide support frame 47. The clearance in the thickness direction ensures that the two can move relative to each other. The arc-shaped side surface of the arc-shaped boss can reduce the impact force and vibration on the end of the guide clamping rod 53 generated by the rolling bearing 23 at the bottom of the Y-shaped push rod 21 during operation, and at the same time prevent the guide clamping rod 53 from being stuck by the bottom surface of the vertical groove in contact with the arc-shaped side surface when rotating and moving in the above-mentioned vertical groove. The top surface of the guide clamping rod 53 has three grooves in the horizontal direction. A spring positioning pin 57 is fixedly installed with a thread on the bottom surface of each groove. One end of the compression spring 55 is fitted with the spring positioning pin 57, and the other end is fitted with the downward shaft pin of the spring positioning block 56 fixed on the vertical surface of the guide support frame 47 by the hexagon socket screw V 59. The compression spring 55 enables the log clamping structure to automatically adapt to the change of the log diameter, ensuring that logs within a certain diameter range can be reliably clamped. The guide clamping rod 53 has two horizontal waist drum grooves 60 between the grooves in the horizontal direction. There is a horizontal waist drum groove on the outside of the horizontal waist drum groove 60. The guide support frame 47 has two vertical waist drum grooves 61 at the corresponding position of the center of the horizontal waist drum groove. The hinge pin 54 passes through the horizontal waist drum groove 60 and the vertical waist drum groove 61 to form a clearance fit. The hinge pin 54 has a step at one end and a retaining ring 62 and an elastic retaining ring for the shaft at the other end, and they are respectively embedded in the horizontal waist drum groove on the outside of the horizontal waist drum groove 60, so that the hinge pin 54 is horizontally positioned, such as Figure 4 , Figure 6 , Figure 7 , Fig.11 The clearance fit movement between the hinge pin 54 and the horizontal waist drum groove 60 and the vertical waist drum groove 61, as well as the clearance fit movement between the end of the guide clamping rod 53 and the end of the upper guide positioning rod 48, ensures that the guide clamping rod 53 moves and rotates within the effective range of the vertical plane without falling off the pin or overturning.

[0077] Working process of the automatic log clamping mechanism: Figure 1 , Figure 4 , Figure 6 , Figure 7 , Fig.10, the log clamping structures horizontally installed side by side on the conveyor chain 14 are automatically opened synchronously at the same time during the upward rotation of the conveyor chain 14 around the sprocket 13, and the logs or profiles 40 fall into the opened mobile clamps 20 in turn. When the conveyor chain 14 runs horizontally, the rolling bearing 23 on the Y-shaped push rod 21 in the log clamping structure is guided by the arc surface of the end of the upper guide positioning rod 48 in the mechanical control structure, and enters the lower horizontal surface of the upper guide positioning rod 48 to form a rolling friction operation. At this time, the Y-shaped push rod 21 is pulled down a fixed distance to pre-clamp the log or profile 40; when the log or profile 40 runs to a position close to the sawing position, the rolling bearing 23 on the Y-shaped push rod 21 is guided by the arc surface of the end of the guide clamping rod 53 in the mechanical control structure, and enters the lower horizontal surface of the guide clamping rod 53 to form a rolling friction operation. At this time, the guide clamping rod 53 pushes the rolling bearing 23 under the action of the compression spring 55 and the self-weight of the guide clamping rod 53. 3→pin 22→Y-shaped push rod 21 moves downward, and at the same time, the symmetrical inclined groove 37 on the upper part of the Y-shaped push rod 21 squeezes and pushes the mobile clamp 20 to move horizontally toward each other, so that the triangular sharp teeth of the mobile clamp 20 further clamp the log or profile 40; after the wood segment is sawed, the rolling bearing 23 enters the lower horizontal surface of the upper guide positioning rod 48 at the other end to form a rolling friction operation, and the wood segment is pre-loosened; when the conveying chain 14 enters another sprocket 13 and rotates around it downward, each log clamping structure is automatically opened at the same time, and finally each wood segment automatically detaches from the log clamping structure under the push of its own weight and the base 19; when the rolling bearing 23 on the Y-shaped push rod 21 bypasses the sprocket 13 and continues to run horizontally with the conveying chain 14, it enters the upper horizontal surface of the lower guide positioning rod 49 in the mechanical control structure to form a rolling friction operation, which can prevent the conveying chain 14 and the log clamping structure installed thereon from detaching from the guide support frame 47 under the action of gravity.

Claims

1. A device for continuously and automatically dropping logs or profiles at fixed distances, characterized in that: The machine comprises a frame (5), a log sawing mechanism and a log feeding movement mechanism, wherein the log feeding movement mechanism is mounted on the frame (5), a log sawing mechanism is arranged next to the log feeding movement mechanism, the log feeding movement mechanism is used to transport logs or profiles (40) to the log sawing mechanism, and the log sawing mechanism is used to saw the logs or profiles (40); The log feeding motion mechanism comprises a driving shaft (11), a driving shaft (12), a sprocket (13), a conveying chain (14), a driving shaft coupling (16) and a driving shaft motor (17); the driving shaft (11) and the driving shaft (12) are arranged horizontally and in parallel with each other, the driving shaft (11) and the driving shaft (12) are both provided with sprockets (13), the sprockets (13) of the driving shaft (11) and the driven shaft (12) are connected by a chain transmission via the conveying chain (14), both ends of the driving shaft (11) and the driven shaft (12) are supported and installed via bearings (15), and one end of the driving shaft (11) is coaxially connected to the output shaft of the driving shaft motor (17) via the driving shaft coupling (16); A plurality of log clamping structures are installed on the conveyor chain (14) of the log feeding motion mechanism, each log clamping structure is used to clamp a log or a profile (40), a mechanical control structure is arranged between the sprockets (13) of the driving active shaft (11) and the driven shaft (12) and the upper and lower chains of the conveyor chain (14), and the mechanical control structure is connected to each log clamping structure passing through the mechanical control structure, so as to drive the log clamping structure to automatically clamp the log or the profile (40); The mechanical control structure comprises a guide support frame (47), an upper pull rod group, a lower guide positioning pull rod (49) and a guide clamping pull rod assembly. The guide support frame (47) is located between the sprockets (13) of the driving active shaft (11) and the driven shaft (12) and the upper and lower chains of the conveying chain (14). The guide support frame (47) is fixed to the frame (5), and the upper and lower sides of the guide support frame (47) are rollingly connected to the rollers of the conveying chain (14). The lower guide positioning pull rods (49) are fixedly installed on the two side surfaces of the lower part of the guide support frame (47). A group of upper pull rod groups are fixedly installed on both side surfaces of the guide support frame (47), and each group of upper pull rod groups includes two upper guide positioning pull rods (48) arranged on the same side surface of the upper part of the guide support frame (47) at the upstream and downstream ends along the transportation direction, and a guide clamping pull rod (53) between the two upper guide positioning pull rods (48); both ends of the guide clamping pull rod (53) are connected to the guide support frame (47) through a waist drum groove matching structure so as to be movable up and down and horizontally, and multiple locations of the guide clamping pull rod (53) are elastically connected to the upper end of the guide support frame (47) through the guide clamping pull rod assembly.

2. The device for continuously and automatically dropping logs or profiles at a fixed distance according to claim 1, characterized in that: The log sawing mechanism comprises a lower spindle (1), an upper spindle (2), a pulley (3), a spindle bearing (4), a spindle coupling (6), a spindle motor (7), a band saw blade (9) and a saw blade adjustment mechanism (10). The upper spindle (2) and the lower spindle (1) are arranged in parallel up and down respectively. The upper spindle (2) and the lower spindle (1) are both provided with pulleys (3). The pulleys (3) of the upper spindle (2) and the lower spindle (1) are connected by a belt drive through the band saw blade (9). The band saw blade (9) is provided with a saw blade adjustment mechanism (10) for adjusting the band saw blade (9). Both ends of the upper spindle (2) and the lower spindle (1) are supported and installed through the spindle bearings (4). One end of the lower spindle (1) is coaxially connected to the output shaft of the spindle motor (7) through the spindle coupling (6).

3. The device for continuously and automatically dropping logs or profiles at a fixed distance according to claim 1, characterized in that: It comprises a plurality of log feeding movement mechanisms, the plurality of log feeding movement mechanisms are arranged in parallel at intervals, and each set of log clamping structures of the plurality of log feeding movement mechanisms is located on the same horizontal line perpendicular to the transport direction of the logs or profiles to form a group of log clamping groups, and a log or profile (40) is placed on a group of log clamping groups.

4. The device for continuously and automatically dropping logs or profiles at fixed distances according to claim 1, characterized in that: The guide clamping pull rod assembly comprises a compression spring (55), a spring positioning block (56) and a spring positioning pin (57); the spring positioning block (56) is fixedly mounted on the side of the guide support frame (47); a groove is formed on the top surface of the guide clamping pull rod (53); the spring positioning pin (57) is placed in the groove on the top surface of the guide clamping pull rod (53); and a compression spring (55) is sleeved between the spring positioning block (56) and the spring positioning pin (57); The waist drum groove matching structure comprises a horizontal waist drum groove (60) provided on the guide clamping pull rod (53), a vertical waist drum groove (61) provided on the guide support frame (47), and a hinge pin (54). The hinge pin (54) is installed through the horizontal waist drum groove (60) and the vertical waist drum groove (61) at the same time, and the end of the hinge pin is axially limited by a retaining ring (62), so that the guide clamping pull rod (53) and the guide support frame (47) can simultaneously move vertically and horizontally relative to each other in the matching guidance of the horizontal waist drum groove (60) and the vertical waist drum groove (61).

5. The device for continuously and automatically dropping logs or profiles at a fixed distance according to claim 1, characterized in that: Each set of log clamping structure comprises a base (19) and a pair of symmetrically arranged clamping plate assemblies arranged on the base (19), each clamping plate assembly comprises two clamping components respectively arranged on the base (19) on both sides symmetrically along the transport direction; each clamping component comprises a movable clamp (20), a Y-shaped push rod (21), a fixed support (24), an L-shaped guide support (25), an L-shaped support (26), a slider (27), a tension spring (29) and a rolling bearing component, the fixed support (24) is fixedly installed on the outer side of the base (19), the movable clamp (20) is slidably installed on the inner side of the base (19), a Y-shaped push rod (21) is arranged between the movable clamp (20) and the fixed support (24), the lower end of the Y-shaped push rod (21) passes through the base (19) and is connected to the mechanical control structure via the rolling bearing component; An L-shaped support (26) is fixedly installed on the bottom surface of the base (19) below the fixed support (24), a boss I (35) is provided in the middle of the bottom of the movable fixture (20) and is embedded in the base straight groove (31) of the base (19) to form a guide slide, and an L-shaped guide support (25) is installed on the top plane of the boss I (35), and the L-shaped support (26) and the L-shaped guide support (25) are respectively located on both sides of the lower end of the Y-shaped push rod (21); the bottom side surfaces of the L-shaped support (26) and the L-shaped guide support (25) are provided with horizontal dovetail grooves, and a slider (27) is slidably embedded in each horizontal dovetail groove, and the slider (27) at the bottom end of the L-shaped support (26) and the L-shaped guide support (25) is elastically connected by a tension spring (29), so that the slider (27) is respectively close to the two vertical side surfaces (41) of the lower end of the Y-shaped push rod (21).

6. The device for continuously and automatically dropping logs or profiles at fixed distances according to claim 5, characterized in that: The upper end of the Y-shaped push rod (21) is in the shape of an inverted triangle, and the movable clamp (20) and the fixed support (24) are provided with triangular notches at the upper part of the side surfaces connected to the Y-shaped push rod (21) to form a clamp inclined surface (38) and a support inclined surface (39), respectively, so that a wedge surface contact fit is formed between the upper end of the Y-shaped push rod (21) and the support inclined surface (39) of the fixed support (24) and the clamp inclined surface (38) of the movable clamp (20), and the wedge surface contact fits at the two locations are symmetrically arranged on both sides of the Y-shaped push rod (21); The sides of the inverted triangle at the upper end of the Y-shaped push rod (21) are provided with inclined grooves (37), and the support inclined surface (39) of the fixed support (24) and the clamp inclined surface (38) of the movable clamp (20) are inserted into the inclined grooves (37) with clearance fit.

7. The device for continuously and automatically dropping logs or profiles at fixed distances according to claim 5, characterized in that: The rolling bearing member comprises a pin (22), a rolling bearing (23), a nut (42) and a bushing (43); the lower end of the Y-shaped push rod (21) passing through the base (19) is coaxially fixedly connected to one end of the pin (22) through the nut (42); the other end of the pin (22) passes through the pin threaded hole (36) and the bushing (43) at the lower end of the Y-shaped push rod (21) in sequence and is then fastened and sleeved in the inner ring of the rolling bearing (23); when each set of log clamping structures runs to the guide clamping pull rod (53), the rolling bearing (23) is located below the guide clamping pull rod (53) and is rollingly connected to the bottom surface of the guide clamping pull rod (53).

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