Automatic grinding machine for end heads of flat bamboo strips

Abstract

The utility model provides an automatic flat bamboo strip end grinding machine which is provided with a grinding component and a conveying component, and the grinding component is formed by left and right overlapping, splicing and combining of a left grinding assembly and a right grinding assembly. A grinding suite and a clamping suite are erected at the left end of the rack of the left grinding assembly; the right grinding assembly adopts a structure which is bilaterally symmetrical to the left grinding assembly; the conveying part is provided with a left conveying chain ring and a right conveying chain ring through a supporting frame; a lower rotating shaft, a gear motor and a cam divider are erected below the supporting frame, and the gear motor drives the left conveying chain ring and the right conveying chain ring to achieve intermittent synchronous advancing through the lower rotating shaft, the cam divider and the chain transmission assembly. When the machine is used for grinding the two ends of the flat bamboo canes, the labor intensity of operators can be reduced, labor injuries to the operators are avoided, and the machining efficiency can be greatly improved. In addition, the flat bamboo battens with different lengths can be matched by adjusting the overlapping length of the left grinding assembly and the right grinding assembly, and use is flexible and convenient.

Description

Technical Field

[0001] The utility model relates to a grinding device, in particular to a grinding machine for automatically grinding the two ends of a flat bamboo strip into a wedge shape, belonging to the technical field of bamboo product processing tools. Background Art

[0002] When using a flat bamboo strip to make the circumferential framework of bamboo woven products such as a round dustpan, it is necessary to bend the long flat bamboo strip into a ring, lap the two ends together, and then tie and fix them with a binding band. In order to ensure a smoother transition at the lap joint, it is necessary to pre-grind the two ends of the flat bamboo strip into a wedge shape, and eliminate the step at the lap joint through the lap of the wedge-shaped ends.

[0003] At present, the work of grinding the two ends of the flat bamboo strip into a wedge shape is mainly operated manually. The specific method is as follows: set up an ordinary grinding machine with a vertical grinding disc. The operator holds the flat bamboo strip beside the vertical grinding disc and presses one side of the end of the flat bamboo strip against the surface of the grinding disc for grinding, and then turns it over to grind the other side, so that the end can be ground into a wedge shape, and then the same operation is carried out on the other end of the flat bamboo strip. Such manual operation has a large labor intensity and low efficiency, and cannot meet the requirements of mass production. In addition, since the flat bamboo strip has a certain elasticity, when holding the flat bamboo strip to grind its end, it will form a high-frequency vibration impact on the operator's palm, making the palm numb and painful. Prolonged operation is likely to cause the operator's palm to swell and lose mobility, resulting in greater labor damage to the operator. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an automatic grinding machine for the ends of flat bamboo strips, which is used to automatically grind the two ends of the flat bamboo strip into a wedge shape, so as to reduce the labor intensity of the operator and increase the production efficiency.

[0005] The specific technical solution adopted by the utility model is as follows:

[0006] An automatic grinding machine for the ends of flat bamboo strips is provided with two major parts: a grinding component and a conveying component. The grinding component is composed of a left grinding assembly and a right grinding assembly, which are overlapped and spliced together left and right.

[0007] The left grinding assembly is provided with a frame. The frame is provided with two parallel horizontal cross bars arranged front and back. A group of strip-shaped holes are provided on the rod bodies of the cross bars. The left end and the middle part of the two cross bars are respectively provided with vertically downward extending support feet to support the cross bars. A group of grinding kits arranged longitudinally in a row are installed at the left end of the frame. The grinding kits include a front-mounted grinding kit for grinding the bottom surface of the end of the flat bamboo strip and a reverse-mounted grinding kit for grinding the top surface of the end of the flat bamboo strip. A clamping kit for clamping the flat bamboo strip is installed at the position of the frame near the left end and on the right side of the grinding kits.

[0008] The right grinding assembly adopts a structure that is symmetrical to the left grinding assembly in the left-right direction, and the distance between the two horizontal cross bars of the right grinding assembly frame matches the distance between the two horizontal cross bars of the left grinding assembly frame; the left ends of the two horizontal cross bars of the right grinding assembly frame overlap and fit on the outside or inside of the right ends of the two horizontal cross bars of the left grinding assembly frame, and a set of longitudinal nut assemblies passing through the strip-shaped holes of the cross bars are provided to lock the overlapping cross bars, thereby splicing the left grinding assembly and the right grinding assembly together in an overlapping manner in the left-right direction. Adjusting the overlapping length of the cross bars of the left grinding assembly and the right grinding assembly can change the length of the whole machine, so as to match flat bamboo strips of different lengths.

[0009] The conveying component is provided with a horizontally arranged support frame. The support frame is provided with two parallel longitudinal bars arranged left and right. Between the two longitudinal bars, two horizontal sprocket shafts are installed through bearing seats in the front and rear directions. At the left and right ends of the two sprocket shafts, conveying sprockets are respectively erected. The two conveying sprockets on the left and the two conveying sprockets on the right are respectively surrounded and meshed with two left-right conveying chain loops. On the side of the conveying chain loop, a group of U-shaped fork plates evenly distributed and extending outward from the chain loop are provided. The opening of the U-shaped fork plate matches the width of the flat bamboo strip. The U-shaped fork plates of the two conveying chain loops correspond to each other in the left-right direction; the support frame is horizontally placed on the horizontally overlapping cross bars of the left grinding assembly and the right grinding assembly. The two conveying chain loops surround the outside of the cross bars. The conveying component is respectively provided with longitudinal lower clamping plates below the two left-right longitudinal bars of the support frame. The lower clamping plates form a clamp with the longitudinal bars from below the cross bars and are tightened and fixed through a group of vertical screw rods; the conveying component is provided with a lower support plate below the middle of the support frame. The lower support plate is fixedly connected to the support frame through an upward extending hanging frame. A lower rotating shaft, a reduction motor and a cam divider are erected on the lower support plate. One end of the lower rotating shaft is connected to the reduction motor, and the other end is connected to the input shaft of the cam divider. The output shaft of the cam divider is connected to one of the sprocket shafts through a chain drive assembly. The reduction motor drives the two left-right conveying chain loops to achieve intermittent synchronous movement through the lower rotating shaft, the cam divider and the chain drive assembly.

[0010] The right-side grinding assembly's right-side grinding kit is provided with a horizontal right-side grinding disc with the grinding surface facing upward and located above the cross frame rod. A lower grinding motor is provided below the right-side grinding disc for driving. Above the upper left of the eccentric position of the right-side grinding disc, there is a right-side cross-pressure rod. A replaceable wear-resistant lining plate is installed on the bottom surface of the right-side cross-pressure rod. The left end of the right-side cross-pressure rod is rotatably hinged to the corresponding rotating shaft at the left end of the machine frame. The middle of the right-side cross-pressure rod is hinged to the piston rod end of the upper pneumatic push rod. The cylinder seat of the upper pneumatic push rod extends upward and leftward and is hinged to the corresponding hinge seat at the left end of the machine frame. By controlling the swing of the right-side cross-pressure rod by the upper pneumatic push rod, the opening and closing of the right-side cross-pressure rod and the grinding surface of the right-side grinding disc are achieved. The right end of the right-side cross-pressure rod is hinged to one end of the upper limit screw rod. The other end of the upper limit screw rod extends upward and leftward, passes through the long hole on the corresponding frame plate at the left end of the machine frame, and is screwed with an adjusting nut. By adjusting the limit length of the upper limit screw rod with the adjusting nut, the clamping limit angle between the right-side cross-pressure rod and the grinding surface of the right-side grinding disc is defined.

[0011] The left-side grinding assembly's left-side grinding kit is provided with a horizontal left-side grinding disc with the grinding surface facing downward and located above the right-side grinding disc. An upper grinding motor is provided above the left-side grinding disc for driving. Below the lower left of the eccentric position of the left-side grinding disc, there is a left-side cross-pressure rod. A replaceable wear-resistant lining plate is installed on the top surface of the left-side cross-pressure rod. The left end of the left-side cross-pressure rod is rotatably hinged to the corresponding rotating shaft at the left end of the machine frame. The middle of the left-side cross-pressure rod is hinged to the piston rod end of the lower pneumatic push rod. The cylinder seat of the lower pneumatic push rod extends downward and leftward and is hinged to the corresponding hinge seat at the left end of the machine frame. By controlling the swing of the left-side cross-pressure rod by the lower pneumatic push rod, the opening and closing of the left-side cross-pressure rod and the grinding surface of the left-side grinding disc are achieved. The right end of the left-side cross-pressure rod is hinged to one end of the lower limit screw rod. The other end of the lower limit screw rod extends downward and leftward, passes through the long hole on the corresponding frame plate at the left end of the machine frame, and is screwed with an adjusting nut. By adjusting the limit length of the lower limit screw rod with the adjusting nut, the clamping limit angle between the left-side cross-pressure rod and the grinding surface of the left-side grinding disc is defined.

[0012] The clamping kit is provided with a lower pillow bar longitudinally straddling the top surfaces of the front and rear cross frame rods. The height of the top surface of the lower pillow bar is flush with the height of the grinding surface of the right-side grinding disc. The machine frame is provided with a longitudinal frame bar empty-mounted above the lower pillow bar. A group of vertical electric push rods are fixedly installed on the longitudinal frame bar. The piston rod ends of the vertical electric push rods extend downward and are connected to the longitudinal upper pressure bar. A replaceable elastic rubber pressure bar is installed on the bottom surface of the upper pressure bar. By controlling the up and down movement of the upper pressure bar by the vertical electric push rods, the opening and closing between the upper pressure bar and the lower pillow bar are achieved.

[0013] The lower rotating shaft of the conveying component is also connected with a group of air control cams on the shaft body. A mechanical air valve with a roller switch is correspondingly provided beside each air control cam. The air inlets of the mechanical air valves are connected to external air supply. The air outlets of the mechanical air valves are respectively connected to the corresponding interfaces of the pneumatic push rods of the grinding components. By the rotating air control cams touching the mechanical air valves, the actions of the pneumatic push rods of the grinding components are controlled.

[0014] This machine ingeniously uses the combination of a rotatable horizontal pressing rod and a grinding disc to jointly clamp the ends of flat bamboo strips and achieve inclined grinding. Using this machine to grind the two ends of flat bamboo strips can reduce the labor intensity of operators and avoid labor injuries to operators. It can also greatly improve the processing efficiency, thus meeting the requirements of mass production. When in use, the operator only needs to put the flat bamboo strips into the feeding station one by one, and then the conveying component will drive the flat bamboo strips to move intermittently from front to back. When it moves to the corresponding station of the positive grinding kit of the grinding component, the positive grinding discs of the left grinding component and the right grinding component will perform inclined grinding on the bottom surfaces of the two ends of the flat bamboo strip. When it moves to the corresponding station of the reverse grinding kit of the grinding component, the reverse grinding discs of the left grinding component and the right grinding component will perform inclined grinding on the top surfaces of the two ends of the flat bamboo strip, thus grinding the two ends of the flat bamboo strip into a wedge shape, and then the conveying component will take out the processed flat bamboo strips. In addition, the grinding component of this machine is composed of the left grinding component and the right grinding component which are overlapped and spliced together on the left and right, and the conveying component is independently placed on the cross frame rod where the grinding component is overlapped and spliced. After loosening the conveying component, the overlapping length of the cross frame rods of the left grinding component and the right grinding component can be adjusted to match flat bamboo strips of different lengths, which is flexible and convenient to use. Description of the Drawings

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the automatic grinding machine for the ends of flat bamboo strips.

[0016] Figure 2 It is Figure 1 the front view of

[0017] Figure 3 It is Figure 1 the top view of

[0018] Figure 4 It is Figure 1 the three-dimensional structural schematic diagram after loading the flat bamboo strips.

[0019] Figure 5 It is the three-dimensional structural schematic diagram of the grinding component.

[0020] Figure 6 It is the three-dimensional structural schematic diagram of the left grinding component.

[0021] Figure 7 It is Figure 2 the sectional view taken along the line A - A of the left grinding component in

[0022] Figure 8 It is the three-dimensional structural schematic diagram of the right grinding component.

[0023] Figure 9 It is the three-dimensional structural schematic diagram of the upper pressing rod component.

[0024] Figure 10Schematic three-dimensional structure diagram of the conveying component.

[0025] Figure 11 Schematic diagram showing that both ends of the flat bamboo strips are ground into wedges and then bent into a circular ring and lapped together.

[0026] In the figure: 1 - frame, 1.1 - horizontal frame rod, 1.2 - support feet, 1.3 - longitudinal frame rod, 2 - longitudinal nut assembly, 3 - positive-mounted grinding disc, 4 - lower grinding motor, 5 - positive-mounted horizontal pressure rod, 6 - upper pneumatic push rod, 7 - upper limit screw rod, 8 - adjusting nut, 9 - reverse-mounted grinding disc, 10 - upper grinding motor, 11 - reverse-mounted horizontal pressure rod, 12 - lower pneumatic push rod, 13 - lower limit screw rod, 14 - lower pillow strip, 15 - vertical electric push rod, 16 - upper pressure strip, 17 - lower stop strip, 17.1 - screw rod assembly, 18 - upper stop strip, 19 - support frame, 19.1 - longitudinal frame rod, 19.2 - support cushion strip, 20 - sprocket shaft, 21 - conveying sprocket, 22 - conveying chain ring, 22.1 - U-shaped fork plate, 23 - lower clamping plate, 24 - vertical screw rod, 25 - lower support plate, 26 - lower rotating shaft, 27 - reduction motor, 28 - cam divider, 29 - chain drive assembly, 30 - air control cam, 31 - mechanical air valve, 32 - horizontally hanging rod, 33 - upper pressure rod, 33.1 - hanging plate, 34 - pin, 35 - limit baffle, 36 - support hook, 37 - support roller, 38 - control switch box. Detailed implementation manners

[0027] The following further describes the present utility model with reference to the accompanying drawings. In the description of the present utility model, orientation terms such as "front", "rear", "left", "right", "upper", and "lower" are defined based on the orientation or positional relationship shown in the accompanying drawings of the specification, and are only for the convenience of describing the present utility model, rather than indicating that the device or component must have a specific orientation, and should not be regarded as a limitation to the present utility model. Figure 1 As shown in the drawings, the automatic grinding machine for the ends of flat bamboo strips of the present utility model is provided with two major parts, namely a grinding component and a conveying component. The grinding component is composed of a left grinding assembly and a right grinding assembly which are overlapped and spliced together left and right.

[0028] As Figure 1-10 shown, the left grinding assembly is provided with a frame 1. The frame 1 is provided with two parallel horizontal frame rods 1.1 arranged front and rear. A set of strip-shaped holes are provided on the rod body of the horizontal frame rod 1.1. Support feet 1.2 extending vertically downward are respectively provided at the left end and the middle part of the two horizontal frame rods 1.1 to support the horizontal frame rods 1.1. A set of grinding kits arranged longitudinally in a row front and rear are mounted at the left end of the frame 1. The grinding kits include a positive-mounted grinding kit for grinding the bottom surface of the end of the flat bamboo strip and a reverse-mounted grinding kit for grinding the top surface of the end of the flat bamboo strip. A clamping kit for clamping the flat bamboo strip is mounted at the position of the frame 1 near the left end and on the right side of the grinding kits.

[0029] ​

[0030] The right grinding assembly adopts a structure that is symmetrical to the left grinding assembly in the left-right direction, and the distance between the two cross-frame bars 1.1 of the right grinding assembly frame 1 matches the distance between the two cross-frame bars 1.1 of the left grinding assembly frame 1; the left ends of the two cross-frame bars 1.1 of the right grinding assembly frame 1 overlap and fit on the outside or inside of the right ends of the two cross-frame bars 1.1 of the left grinding assembly frame 1, and a set of longitudinal nut assemblies 2 passing through the strip holes of the cross-frame bars 1.1 are provided to lock the overlapping cross-frame bars 1.1, thereby splicing the left grinding assembly and the right grinding assembly together in an overlapping manner in the left-right direction. Adjusting the overlapping length of the cross-frame bars 1.1 of the left grinding assembly and the right grinding assembly can change the length of the whole machine, so as to match flat bamboo strips of different lengths.

[0031] The right-side-up grinding kit of the left grinding assembly is provided with a horizontal right-side-up grinding disc 3 with the grinding surface facing upward and located above the cross-frame bar 1.1. A lower grinding motor 4 is provided below the right-side-up grinding disc 3 for driving. The upper left of the eccentric position of the right-side-up grinding disc 3 is provided with a right-side-up horizontal pressing bar 5. A replaceable wear-resistant lining plate is installed on the bottom surface of the right-side-up horizontal pressing bar 5. The left end of the right-side-up horizontal pressing bar 5 is rotatably hinged to the corresponding rotating shaft at the left end of the frame 1. The middle of the right-side-up horizontal pressing bar 5 is hinged to the piston rod end of the upper pneumatic push rod 6. The cylinder seat of the upper pneumatic push rod 6 extends upward and leftward and is hinged to the corresponding hinge seat at the left end of the frame 1. By controlling the swing of the right-side-up horizontal pressing bar 5 through the upper pneumatic push rod 6, the opening and closing of the right-side-up horizontal pressing bar 5 and the grinding surface of the right-side-up grinding disc 3 are realized. The right end of the right-side-up horizontal pressing bar 5 is hinged to one end of the upper limit screw rod 7. The other end of the upper limit screw rod 7 extends upward and leftward and passes through the long hole on the corresponding frame plate at the left end of the frame 1 and is then screwed with an adjusting nut 8. By adjusting the limit length of the upper limit screw rod 7 through the adjusting nut 8, the clamping limit angle between the right-side-up horizontal pressing bar 5 and the grinding surface of the right-side-up grinding disc 3 is limited.

[0032] The upside-down grinding kit of the left grinding assembly is provided with a horizontal upside-down grinding disc 9 with the grinding surface facing downward and located above the right-side-up grinding disc 3. An upper grinding motor 10 is provided above the upside-down grinding disc 9 for driving. The lower left of the eccentric position of the upside-down grinding disc 9 is provided with an upside-down horizontal pressing bar 11. A replaceable wear-resistant lining plate is installed on the top surface of the upside-down horizontal pressing bar 11. The left end of the upside-down horizontal pressing bar 11 is rotatably hinged to the corresponding rotating shaft at the left end of the frame 1. The middle of the upside-down horizontal pressing bar 11 is hinged to the piston rod end of the lower pneumatic push rod 12. The cylinder seat of the lower pneumatic push rod 12 extends downward and leftward and is hinged to the corresponding hinge seat at the left end of the frame 1. By controlling the swing of the upside-down horizontal pressing bar 11 through the lower pneumatic push rod 12, the opening and closing of the upside-down horizontal pressing bar 11 and the grinding surface of the upside-down grinding disc 9 are realized. The right end of the upside-down horizontal pressing bar 11 is hinged to one end of the lower limit screw rod 13. The other end of the lower limit screw rod 13 extends downward and leftward and passes through the long hole on the corresponding frame plate at the left end of the frame 1 and is then screwed with an adjusting nut 8. By adjusting the limit length of the lower limit screw rod 13 through the adjusting nut 8, the clamping limit angle between the upside-down horizontal pressing bar 11 and the grinding surface of the upside-down grinding disc 9 is limited.

[0033] The clamping kit is provided with a lower sleeper strip 14 longitudinally spanning on the top surfaces of the front and rear cross-frame bars 1.1. The height of the top surface of the lower sleeper strip 14 is flush with the height of the grinding surface of the right-side-up grinding disc 3. A longitudinal frame bar 1.3 is air-mounted above the lower sleeper strip 14 on the frame 1. A set of vertical electric push rods 15 are fixedly installed on the longitudinal frame bar 1.3. The piston rod ends of the vertical electric push rods 15 extend downward and are connected to the longitudinal upper pressing strip 16. A replaceable elastic rubber pressing strip is installed on the bottom surface of the upper pressing strip 16. The opening and clamping between the upper pressing strip 16 and the lower sleeper strip 14 are realized by controlling the up and down movement of the upper pressing strip 16 through the vertical electric push rods 15.

[0034] Preferably, each grinding kit of the left grinding assembly and the right grinding assembly is provided with two sets of right-side-up grinding kits and one set of upside-down grinding kits, so that the ends of the flat bamboo strips are ground into unequal-sided wedges with one side deep and the other side shallow, so that they fit more smoothly when the two ends are lapped, as Figure 11 shown.

[0035] Since the right-side-up grinding disc 3 and the upside-down grinding disc 9 are provided with raised locking nuts in the middle of the grinding surface, in order to prevent the end of the flat bamboo strip from being stuck by the locking nut when the conveying component drives the flat bamboo strip to move from front to back, the frames 1 of the left grinding assembly and the right grinding assembly are provided with guide channels at the positions between the right-side-up grinding disc 3 and the upside-down grinding disc 9 and the lower sleeper strip 14; the guide channel is composed of a longitudinally arranged lower retaining strip 17 and an upper retaining strip 18. The front and rear ends of the lower retaining strip 17 are provided with vertically extending screw assemblies 17.1. The lower retaining strip 17 longitudinally spans on the top surfaces of the front and rear cross-frame bars 1.1 through the front and rear screw assemblies 17.1 and can be adjusted in erection height. The upper retaining strip 18 is fixedly installed above the lower retaining strip 17 through the corresponding upper frame bar of the frame 1. The channel between the upper retaining strip 18 and the lower retaining strip 17 is the guide channel. The guide channel is provided with corresponding avoidance bends at the positions corresponding to the locking nuts of the right-side-up grinding disc 3 and the upside-down grinding disc 9. When the end of the flat bamboo strip passes through the middle of the grinding surface of the right-side-up grinding disc 3 and the upside-down grinding disc 9, it can avoid the raised locking nut in the middle of the grinding surface under the guidance of the avoidance bend of the guide channel.

[0036] The conveying component is provided with a horizontally arranged support frame 19. The support frame 19 is provided with two longitudinal frame bars 19.1 arranged in parallel from left to right. Between the two longitudinal frame bars 19.1, there are two transverse sprocket shafts 20 installed through bearing seats in the front and rear directions. The left and right ends of the two sprocket shafts 20 are respectively provided with conveying sprockets 21. The two conveying sprockets 21 on the left and the two conveying sprockets 21 on the right are respectively surrounded and engaged with two left and right conveying chain loops 22. On the side of the conveying chain loop 22, there is a group of U-shaped fork plates 22.1 evenly distributed and extending outward from the chain loop. The opening of the U-shaped fork plate 22.1 matches the width of the flat bamboo strips. The U-shaped fork plates 22.1 of the two conveying chain loops 22 correspond to each other in the left and right directions. The support frame 19 is horizontally placed on the transverse frame bar 1.1 where the left grinding component and the right grinding component are overlapped and spliced left and right. The two conveying chain loops 22 surround the outside of the transverse frame bar 1.1. The conveying component is respectively provided with longitudinal lower clamping plates 23 under the left and right longitudinal frame bars 19.1 of the support frame 19. The lower clamping plates 23 form a clamp with the longitudinal frame bars 19.1 from below the transverse frame bar 1.1 and are tightened and fixed through a group of vertical screw rods 24. The conveying component is provided with a lower support plate 25 under the middle of the support frame 19. The lower support plate 25 is fixedly connected to the support frame 19 through an upward extending hanging frame. A lower rotating shaft 26, a reduction motor 27 and a cam divider 28 are installed on the lower support plate 25. One end of the lower rotating shaft 26 is connected to the reduction motor 27, and the other end is connected to the input shaft of the cam divider 28. The output shaft of the cam divider 28 is connected to one of the sprocket shafts 20 through a chain drive assembly 29. The two left and right conveying chain loops 22 are driven by the reduction motor 27 through the lower rotating shaft 26, the cam divider 28 and the chain drive assembly 29 to achieve intermittent synchronous movement. A group of air control cams 30 are also connected to the shaft body of the lower rotating shaft 26. A mechanical air valve 31 with a roller switch is correspondingly arranged beside each air control cam 30. The air inlets of the mechanical air valves 31 are connected to external air supply, and the air outlets of the mechanical air valves 31 are respectively connected to the corresponding interfaces of the pneumatic push rods of the grinding component. The actions of the pneumatic push rods of the grinding component are controlled by the rotating air control cams 30 touching the mechanical air valves 31. In order to prevent the upper chain of the conveying chain loop 22 from sagging when conveying the flat bamboo strips and affecting the conveying, the support frame 19 of the conveying component is also provided with longitudinal support cushion strips 19.2 under the upper chains of the two conveying chain loops 22 to support the chains in a slidable manner.

[0037] To prevent the middle part of the flat bamboo strip from warping during grinding or movement, which may affect normal operation, this grinding machine is also equipped with an upper pressure rod assembly. The upper pressure rod assembly is provided with two parallel horizontal hanging rods 32 arranged front and back. Below the two horizontal hanging rods 32, there is a longitudinal upper pressure rod 33. The front and rear ends of the upper pressure rod 33 are connected to the ends of the front and rear horizontal hanging rods 32 through suspension plates 33.1 and pins 34. The ends of the horizontal hanging rods 32 are provided with a group of horizontally arranged pin holes, and the upper ends of the suspension plates 33.1 are provided with a group of vertically arranged pin holes. By selecting different pin holes to connect with the pins 34, the adjustment of the up-and-down position and left-and-right position of the upper pressure rod 33 can be achieved. The head ends of the two horizontal hanging rods 32 are fixedly connected to the corresponding upper rack bars of the frame 1 of the left grinding assembly or the right grinding assembly, and the upper pressure rod 33 is located above the middle of the grinding component. The upper pressure rod 33 prevents warping and limits the position of the middle part of the flat bamboo strip from above.

[0038] Further, at the front sides of the cross frame bars 1.1 of the left end of the left grinding assembly and the right end of the right grinding assembly, limit baffles 35 for limiting the two ends of the flat bamboo strip are respectively installed. When the operator places the flat bamboo strip, the flat bamboo strip is placed on the openings of the corresponding U-shaped fork plates 22.1 of the left and right conveyor chain loops 22, and at the same time, the left and right ends of the flat bamboo strip respectively abut against the limit baffles 35 at the left and right ends, so as to realize the left-and-right limit of the feeding of the flat bamboo strip.

[0039] Further, at the positions above the front ends of the frames 1 of the left grinding assembly and the right grinding assembly, a group of hooks 36 extending forward for batch placing the flat bamboo strips to be fed are respectively installed. During feeding, the operator only needs to take the flat bamboo strips above one by one and place them into the corresponding feeding stations.

[0040] Further, on the sides of each support leg 1.2 below the frames 1 of the left grinding assembly and the right grinding assembly, support rollers 37 that can be adjusted in height are respectively installed. The support rollers 37 are connected to the fixed support plates of the frame 1 through a screw column assembly that can be adjusted in height. When overlapping and splicing the left grinding assembly and the right grinding assembly or adjusting the overlapping length, the support rollers 37 can be adjusted to descend to support the entire frame 1, so as to facilitate pushing and pulling for splicing.

[0041] To prevent the grinding powder from contaminating the parts on the lower support plate 25 under the conveyor component, a lower shield is also provided around the lower support plate 25 to cover the parts installed on the lower support plate 25. The lower shield is not shown in the drawings.

[0042] Further, a control switch box 38 is also installed on the frame 1 of the left grinding assembly or the right grinding assembly to control the upper grinding motor 10, the lower grinding motor 4, and the reduction motor 27.

[0043] To prevent the grinding dust and chips of this machine from flying around and polluting the working environment, a corresponding air duct and exhaust fan need to be equipped on the side during the installation of this machine, so as to centrally extract and process the grinding dust and chips.

[0044] As Figure 4 shown, the usage process of this automatic end grinding machine for flat bamboo strips is as follows:

[0045] (1). Turn on the external air supply, operate the control switch box 38, so that the lower grinding motor 4 and the upper grinding motor 10 drive the front-mounted grinding disc 3 and the reverse grinding disc 9 to rotate in place respectively, and the reduction motor 27 drives the upper chains of the left and right conveyor chain loops 22 to intermittently and synchronously travel from front to back. During the intermittent period of the travel of the conveyor chain loop 22, the operator places the flat bamboo strip to be processed on the openings of the U-shaped fork plates 22.1 at the front end of the upper chains of the left and right conveyor chain loops 22 from the front of this machine, and at the same time makes the left and right ends of the flat bamboo strip respectively abut against the limiting baffle plates 35 at the left and right ends, then the feeding can be completed. The time distribution of the travel and intermittent period of the conveyor chain loop 22 is set by the cam divider 28.

[0046] (2). The flat bamboo strip with the fed material follows the conveyor chain loop 22 to intermittently travel from front to back. When the flat bamboo strip travels to the working position of each grinding kit, the travel stops. During this intermittent period of travel, first, the vertical electric push rods 15 of the clamping kits at the left and right ends control the upper pressing strip 16 to move downward to jointly clamp and fix the two ends of the flat bamboo strip with the lower pillow strip 14, and then the grinding kit grinds the single side of the end of the flat bamboo strip. After reaching the set time, the clamping of the flat bamboo strip is released, and the conveyor chain loop 22 continues to carry the flat bamboo strip to the next grinding kit working position for grinding. Finally, the conveyor chain loop 22 carries the ground flat bamboo strip to automatically fall downward from the rear. The clamping and fixing and grinding time are controlled by the control air cam 30 to touch the corresponding mechanical air valve 31.

[0047] When grinding the end of the flat bamboo strip at the front-mounted grinding kit working position, the upper pneumatic push rod 6 controls the front-mounted cross-pressure rod 5 to swing downward, and the front-mounted cross-pressure rod 5 presses the bottom surface of the end of the flat bamboo strip against the grinding surface of the front-mounted grinding disc 3, so that the front-mounted grinding disc 3 grinds the bottom surface of the end of the flat bamboo strip. Since the front-mounted cross-pressure rod 5 swings and presses the end of the flat bamboo strip, the front-mounted grinding disc 3 forms a wedge-shaped grinding on the bottom surface of the end of the flat bamboo strip.

[0048] When grinding the end of the flat bamboo strip at the reverse-mounted grinding kit working position, the lower pneumatic push rod 12 controls the reverse-mounted cross-pressure rod 11 to swing upward, and the reverse-mounted cross-pressure rod 11 presses the top surface of the end of the flat bamboo strip against the grinding surface of the reverse-mounted grinding disc 9, so that the reverse-mounted grinding disc 9 grinds the top surface of the end of the flat bamboo strip. Since the reverse-mounted cross-pressure rod 11 swings and presses the end of the flat bamboo strip, the reverse-mounted grinding disc 9 forms a wedge-shaped grinding on the top surface of the end of the flat bamboo strip.

[0049] The above-mentioned illustrations are only typical embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An automatic grinding machine for the end of flat bamboo strips, characterized in that: The grinding machine is provided with two major parts, namely a grinding component and a conveying component. The grinding component is formed by the left grinding assembly and the right grinding assembly overlapping and splicing together left and right; The left grinding assembly is provided with a frame. The frame is provided with two parallel horizontal cross-frame rods arranged front and back. A group of strip-shaped holes are provided on the rod bodies of the cross-frame rods. The left ends and the middle parts of the two cross-frame rods are respectively provided with vertically extending support feet to support the cross-frame rods; A group of grinding kits arranged longitudinally in a row are installed at the left end of the frame. The grinding kits include a front-mounted grinding kit for grinding the bottom surface of the end of the flat bamboo strip and a reverse-mounted grinding kit for grinding the top surface of the end of the flat bamboo strip; A clamping kit for clamping the flat bamboo strip is installed at the position of the frame near the left end and on the right side of the grinding kits; The right grinding assembly adopts a structure that is symmetrical to the left grinding assembly left and right. Moreover, the distance between the two cross-frame rods of the right grinding assembly frame is matched with the distance between the two cross-frame rods of the left grinding assembly frame; The left ends of the two cross-frame rods of the right grinding assembly frame are overlapped and attached to the outside or inside of the right ends of the two cross-frame rods of the left grinding assembly frame, and a group of longitudinal nut assemblies passing through the strip-shaped holes of the cross-frame rods are provided to lock the overlapped cross-frame rods, thereby splicing the left grinding assembly and the right grinding assembly together left and right by overlapping; The conveying component is provided with a horizontally arranged support frame. The support frame is provided with two parallel longitudinal frame rods arranged left and right. Two transverse sprocket shafts are installed between the two longitudinal frame rods through bearing seats. The left and right ends of the two sprocket shafts are respectively provided with conveying sprockets. The two conveying sprockets on the left side and the two conveying sprockets on the right side are respectively surrounded and engaged with two left and right conveying chain rings. A group of U-shaped fork plates evenly distributed and extending outward from the side of the conveying chain ring are provided on the side of the conveying chain ring. The opening of the U-shaped fork plate is matched with the width of the flat bamboo strip. The U-shaped fork plates of the two conveying chain rings correspond to each other in the left-right direction; The support frame is horizontally placed on the cross-frame rods spliced together left and right by the left grinding assembly and the right grinding assembly. The two conveying chain rings are surrounded outside the cross-frame rods. The conveying component is respectively provided with longitudinal lower clamping plates below the left and right longitudinal frame rods of the support frame. The lower clamping plates form a clamp with the longitudinal frame rods from below the cross-frame rods and are tightened and fixed by a group of vertical screw rods; The conveying component is provided with a lower support plate below the middle of the support frame. The lower support plate is fixedly connected to the support frame through an upward extending hanging frame. A lower rotating shaft, a reduction motor and a cam divider are installed on the lower support plate. One end of the lower rotating shaft is connected to the reduction motor, and the other end is connected to the input shaft of the cam divider. The output shaft of the cam divider is connected to one of the sprocket shafts through a chain drive assembly. The two left and right conveying chain rings are driven by the reduction motor through the lower rotating shaft, the cam divider and the chain drive assembly to achieve intermittent synchronous movement.

2. The automatic grinding machine for the end of the flat bamboo strip according to claim 1, wherein: The right-side grinding assembly's right-side grinding kit is provided with a horizontal right-side grinding disc with its grinding surface facing upward and located above the cross frame rod. A lower grinding motor is provided below the right-side grinding disc for driving. An upper right-side pressing rod is provided at the upper left of the eccentric position of the right-side grinding disc. A replaceable wear-resistant lining plate is installed on the bottom surface of the upper right-side pressing rod. The left end of the upper right-side pressing rod is rotatably hinged to the corresponding rotating shaft at the left end of the machine frame. The middle part of the upper right-side pressing rod is hinged to the piston rod end of the upper pneumatic push rod. The cylinder seat of the upper pneumatic push rod extends upward to the left and is hinged to the corresponding hinge seat at the left end of the machine frame. By controlling the swing of the upper right-side pressing rod with the upper pneumatic push rod, the opening and closing of the upper right-side pressing rod and the grinding surface of the right-side grinding disc are realized. The right end of the upper right-side pressing rod is hinged to one end of the upper limit screw. The other end of the upper limit screw extends upward to the left and passes through the long hole on the corresponding frame plate at the left end of the machine frame and is then screwed with an adjusting nut. By adjusting the limiting length of the upper limit screw with the adjusting nut, the clamping limit angle between the upper right-side pressing rod and the grinding surface of the right-side grinding disc is limited; The left-side grinding assembly's left-side grinding kit is provided with a horizontal left-side grinding disc with its grinding surface facing downward and located above the right-side grinding disc. An upper grinding motor is provided above the left-side grinding disc for driving. A lower left-side pressing rod is provided at the lower left of the eccentric position of the left-side grinding disc. A replaceable wear-resistant lining plate is installed on the top surface of the lower left-side pressing rod. The left end of the lower left-side pressing rod is rotatably hinged to the corresponding rotating shaft at the left end of the machine frame. The middle part of the lower left-side pressing rod is hinged to the piston rod end of the lower pneumatic push rod. The cylinder seat of the lower pneumatic push rod extends downward to the left and is hinged to the corresponding hinge seat at the left end of the machine frame. By controlling the swing of the lower left-side pressing rod with the lower pneumatic push rod, the opening and closing of the lower left-side pressing rod and the grinding surface of the left-side grinding disc are realized. The right end of the lower left-side pressing rod is hinged to one end of the lower limit screw. The other end of the lower limit screw extends downward to the left and passes through the long hole on the corresponding frame plate at the left end of the machine frame and is then screwed with an adjusting nut. By adjusting the limiting length of the lower limit screw with the adjusting nut, the clamping limit angle between the lower left-side pressing rod and the grinding surface of the left-side grinding disc is limited; The clamping kit is provided with a lower pillow bar longitudinally straddling on the top surfaces of the front and rear cross frame rods. The height of the top surface of the lower pillow bar is flush with the height of the grinding surface of the right-side grinding disc. The machine frame is provided with a longitudinal frame bar in the air above the lower pillow bar. A group of vertical electric push rods are fixedly installed on the longitudinal frame bar. The piston rod ends of the vertical electric push rods extend downward and are connected to the longitudinal upper pressing bar. A replaceable elastic rubber pressing bar is installed on the bottom surface of the upper pressing bar. By controlling the up and down movement of the upper pressing bar with the vertical electric push rods, the opening and closing between the upper pressing bar and the lower pillow bar are realized; A group of air control cams are also connected to the lower rotating shaft of the conveying component on the shaft body. A mechanical air valve with a roller switch is correspondingly provided beside each air control cam. The air inlets of each mechanical air valve are connected to external air supply. The air outlets of each mechanical air valve are respectively connected to the corresponding interfaces of each pneumatic push rod of the grinding component. By the rotating air control cam touching the mechanical air valve, the actions of each pneumatic push rod of the grinding component are controlled.

3. The automatic end grinding machine for flat bamboo strips according to claim 2, characterized in that: The frames of the left grinding assembly and the right grinding assembly are provided with guiding channels at the positions between the right-side-up grinding discs and the upside-down grinding discs and the lower sleeper bars; the guiding channels are formed by combining a longitudinally arranged lower retaining bar and an upper retaining bar. The front and rear ends of the lower retaining bar are provided with vertically extending screw assemblies. The lower retaining bar is longitudinally spanned on the top surfaces of the front and rear cross-frame bars through the front and rear screw assemblies and the erection height can be adjusted. The upper retaining bar is fixedly erected above the lower retaining bar through the corresponding upper frame bars of the frame. The channel between the upper retaining bar and the lower retaining bar is the guiding channel. The guiding channel is provided with corresponding avoidance bends at the positions corresponding to the locking nuts of the right-side-up grinding discs and the upside-down grinding discs.

4. The automatic grinding machine for the end of the flat bamboo strip according to claim 1, wherein: The grinding kits of the left grinding assembly and the right grinding assembly are each provided with two right-side-up grinding kits and one upside-down grinding kit.

5. The automatic grinding machine for the end of the flat bamboo strip according to claim 1, characterized in that: The support frame of the conveying component is further provided with a longitudinal support cushion bar below the upper chains corresponding to the two conveying chain loops to slidably support the chains.

6. The automatic grinding machine for the end of the flat bamboo strip according to claim 1, characterized in that: The grinding machine is further provided with an upper pressure bar assembly. The upper pressure bar assembly is provided with two horizontally hanging bars arranged in parallel front and back. A longitudinal upper pressure bar is arranged below the two horizontally hanging bars. The front and rear ends of the upper pressure bar are connected to the ends of the front and rear horizontally hanging bars through hanging plates and retaining pins. A group of horizontally arranged pin holes are provided at the ends of the horizontally hanging bars, and a group of vertically arranged pin holes are provided at the upper ends of the hanging plates. By selecting different pin holes to connect with the retaining pins, the adjustment of the up-and-down position and the left-and-right position of the upper pressure bar can be realized; the front ends of the two horizontally hanging bars are fixedly connected to the corresponding upper frame bars of the frame of the left grinding assembly or the right grinding assembly, and the upper pressure bar is located above the middle of the grinding component. The upper pressure bar is used to prevent the middle of the flat bamboo strips from warping and limit the position.

7. The automatic grinding machine for the end of the flat bamboo strip according to claim 1, wherein: Limit baffles for limiting the two ends of the flat bamboo strips are respectively erected on the front sides of the cross-frame bars at the left ends of the left grinding assembly and the right ends of the right grinding assembly.

8. The automatic grinding machine for the end of the flat bamboo strip according to claim 1, characterized in that: A group of hooks extending forward for batch placing the flat bamboo strips to be fed are respectively erected at the positions above the front ends of the frames at the left ends of the left grinding assembly and the right ends of the right grinding assembly.

9. The automatic grinding machine for the end of the flat bamboo strip according to claim 1, characterized in that: Support rollers that can be adjusted in lifting are respectively erected beside each support leg below the frames of the left grinding assembly and the right grinding assembly. The support rollers are connected to the fixed support plates of the frames through screw assemblies that can be adjusted in lifting.

10. The automatic grinding machine for the end of the flat bamboo strip according to claim 1, wherein: The conveying component is further provided with a lower shield around the lower support plate to cover the parts erected on the lower support plate.

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