Gearbox of flat saw

Abstract

The utility model provides a flat saw gear box, the input end and the output end of the flat saw gear box are respectively connected with a driving device and a cutter head, the flat saw gear box is provided with a first back clearance helical gear set, the first back clearance helical gear set comprises a first helical gear and a second helical gear which are meshed with each other, and the first helical gear is in transmission connection with the driving device; the second back clearance bevel gear set comprises a third bevel gear and a fourth bevel gear which are meshed with each other, the third bevel gear is coaxially and fixedly connected with the second bevel gear, and the fourth bevel gear is coaxially and fixedly connected with the cutter head; wherein one or more of the first bevel gear, the second bevel gear, the third bevel gear and the fourth bevel gear are each provided with two bevel gear blocks which are attached and fixed, and a plurality of springs are arranged between the two bevel gear blocks in the circumferential direction. Through the staggered phase arrangement of the double-back-clearance helical gear set and the pre-tightening compensation mechanism of the butterfly spring, the back clearance of the transmission system is accurately controlled, and the displacement error of the cutter head is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a flat saw for cutting, and particularly relates to a flat saw gear box. BACKGROUND

[0002] As the core equipment in the field of wood processing and metal cutting, the cutting precision of the flat saw directly affects the product quality and material utilization rate. There are two major technical bottlenecks in traditional equipment: first, the cutting position deviation caused by the backlash of the gear transmission system, especially when the error accumulates to more than 0.5mm during high-speed reversing operation; second, the burr phenomenon caused by the brake response delay, which is particularly obvious when processing hard alloy materials. SUMMARY

[0003] The utility model provides a flat saw gear box, the input and output of flat saw gear box are connected drive arrangement and cutter respectively, the flat saw gear box is equipped with:

[0004] The first backlash helical gear set comprises a first helical gear and a second helical gear that are meshed with each other, and the first helical gear is in transmission connection with the drive device;

[0005] The second backlash helical gear set comprises a third helical gear and a fourth helical gear that are meshed with each other, the third helical gear is fixedly connected with the second helical gear in a coaxial manner, and the fourth helical gear is fixedly connected with the cutter in a coaxial manner; wherein,

[0006] One or more of the first helical gear, the second helical gear, the third helical gear and the fourth helical gear are provided with two helical gear blocks that are fixedly attached, and a plurality of springs are arranged along the circumferential direction between the two helical gear blocks.

[0007] Further, the flat saw gear box further comprises a bevel gear set, the bevel gear set comprises a first bevel gear and a second bevel gear that are meshed with each other, the first bevel gear is fixedly installed on the output shaft of the drive device, and the second bevel gear is fixedly connected with the first helical gear in a coaxial manner.

[0008] Further, the flat saw gear box further comprises a magnetic powder brake system, the magnetic powder brake system comprises a magnetic powder brake, the magnetic powder brake is provided with a brake shaft and a brake helical gear fixedly installed on the brake shaft, and the brake helical gear is engaged with the fourth helical gear.

[0009] Further, a cooling liquid circulating pump is connected to one side of the box body of the flat saw gear box, cooling liquid is arranged in the box body, and the bevel gear set, the first backlash helical gear set and the second backlash helical gear set are in contact with the cooling liquid.

[0010] The cooling liquid circulating pump is connected with the liquid inlet and the liquid outlet through two pipes.

[0011] Further, the second helical gear and the fourth helical gear are provided with two pieces of helical gear blocks fixedly attached.

[0012] Further, the spring is a butterfly spring.

[0013] Further, the two pieces of attached helical gear blocks are a first helical gear block and a second helical gear block.

[0014] The end surface of the first helical gear block in contact with the second helical gear block is provided with a plurality of threaded holes and a plurality of axially extending guide columns and spring seats in the circumferential direction, one end of the spring is mounted on the spring seat, and the other end of the spring abuts against the inner side end surface of the second helical gear block.

[0015] The second helical gear block is provided with a plurality of guide holes and positioning holes corresponding to the positions of the guide columns and the spring seats in the circumferential direction.

[0016] The outer side surface of the second helical gear block is provided with a pressing plate, and a fastening bolt is fixedly connected with the threaded hole through the pressing plate, so as to fix the pressing plate and press the second helical gear block.

[0017] Further, the cutter head is installed inside the box body, and a tungsten steel clamping block is fixedly installed inside the box body, and the tungsten steel clamping block is provided with a clearance groove matched with the two side end surfaces of the cutter head.

[0018] The utility model has the advantages that:

[0019] (1) through the phase error arrangement of the double-backlash helical gear set, cooperating with the pre-tightening compensation mechanism of the butterfly spring, the transmission system backlash is accurately controlled, and the cutter head displacement error is effectively reduced.

[0020] (2) through the magnetic powder brake system, quick response braking is realized, and the notch burr phenomenon is effectively reduced. The magnetic powder brake system utilizes electromagnetic principle, when braking is needed, the magnetic powder brake quickly responds to make the cutter head quickly stop rotating, and the notch burr caused by braking delay is avoided. In addition, the magnetic powder brake system also has the advantages of good stability and long service life, and further improves the overall performance of the flat saw;

[0021] (3) the three-stage transmission system adopts the staggered heat dissipation structure, cooperating with the circulating cooling system, and the service life of the key components under continuous operation condition is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present utility model, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, obviously, the drawings in the following description are only some embodiments of the present utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0023] Figure 1 It is the appearance drawing of the present utility model's plate saw;

[0024] Figure 2 It is the internal structure plan view of the present utility model's plate saw gear box;

[0025] Figure 3 It is the internal structure perspective view of the present utility model's plate saw gear box;

[0026] Figure 4 It is the schematic diagram of the second helical gear in an embodiment;

[0027] Figure 5 It is the structure exploded view of the second helical gear in an embodiment. DETAILED DESCRIPTION

[0028] In the following description, a large number of specific details are given in order to provide a more thorough understanding of the present utility model. However, it is obvious for those skilled in the art that the present utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present utility model, some technical features known in the art are not described.

[0029] In order to thoroughly understand the present utility model, detailed steps and detailed structures will be proposed in the following description in order to explain the technical scheme of the present utility model. The preferred embodiments of the present utility model are described in detail as follows, however, in addition to these detailed descriptions, the present utility model can also have other implementation manners.

[0030] The present utility model provides a kind of plate saw gear box, the input end and output end of plate saw gear box 100 are connected driving device 200 and cutter head 300 respectively.Wherein, cutter head 300 is installed in the box body 101 of plate saw gear box 100, and tungsten steel clamping block 102 is fixedly installed in the box body 101, and tungsten steel clamping block 102 is equipped with the clearance groove that is matched with the clearance of the two side end faces of cutter head 300.Circular saw blade is clamped by tungsten steel clamping block 102, and the stability of saw blade in sawing process is guaranteed.

[0031] Plate saw gear box 100 is equipped with bevel gear set 130, first backlash helical gear set 110, second backlash helical gear set 120, magnetic powder brake system 140, cooling liquid circulating pump 150.

[0032] bevel gear set 130

[0033] The bevel gear set 130 comprises a first bevel gear 131 and a second bevel gear 132 which are engaged with each other, the first bevel gear 131 is fixedly installed on the output shaft 201 of the driving device 200, and the second bevel gear 132 is coaxially fixedly connected with the first helical gear 111.

[0034] The first back-lash helical gear set 110

[0035] The first back-lash helical gear set 110 comprises a first helical gear 111 and a second helical gear 112 which are engaged with each other, and the first helical gear 111 is drivingly connected with the driving device 200.

[0036] The second back-lash helical gear set 120

[0037] The second back-lash helical gear set 120 comprises a third helical gear 121 and a fourth helical gear 122 which are engaged with each other, the third helical gear 121 is coaxially fixedly connected with the second helical gear 112, and the fourth helical gear 122 is coaxially fixedly connected with the cutter head 300.

[0038] In an optional embodiment, the second helical gear 112 and the fourth helical gear 122 are both provided with two pieces of the first helical gear block 160 and the second helical gear block 170. Figures 4-5 As shown in the figure, the end surface of the first helical gear block 160 which is in contact with the second helical gear block 170 is provided with a plurality of threaded holes 161, a plurality of axially extending guide columns 162 and spring seats 163 in the circumferential direction, one end of a spring 164 is installed on the spring seat 163, and the other end of the spring 164 abuts against the inner side end surface of the second helical gear block 170. The second helical gear block 170 is provided with a plurality of guide holes 172 and positioning holes 173 which correspond to the positions of the guide columns 162 and the spring seats 163 in the circumferential direction. The guide holes 172 cooperate with the guide columns 162 to play a positioning role, and the positioning holes 173 cooperate with the spring seats 163 to play a role of fixing the spring 164. Preferably, the spring 164 is a butterfly spring.

[0039] The first helical gear block 160 is provided with a front protruding blocking ring 165, and the second helical gear block 170 is sleeved outside the blocking ring 165 to play a fixing role.

[0040] The outer side surface of the second helical gear block 170 is provided with a pressing plate 180, a fastening bolt 181 passes through the pressing plate 180 and is fixedly connected with the threaded hole 161 of the first helical gear block 160 to fix the pressing plate 180 and press the second helical gear block 170 tightly. The second helical gear block 170 is provided with a plurality of positioning bolts 174, and the pressing plate 180 is provided with positioning grooves 182 which correspond to the positions of the positioning bolts 174, so as to facilitate accurate positioning of the pressing plate 180.

[0041] The second helical gear 112 and the fourth helical gear 122 are both designed as double-toothed plates and are provided with springs between the two helical gear blocks, and the spring 164 can produce elastic compensation displacement under the axial pre-tightening force. When the transmission system bears alternating loads, the elastic deformation of the spring between the helical gear blocks realizes dynamic fitting compensation of the meshing tooth surfaces, and the rigidity constraint formed by the bolt connection can ensure the stability of power transmission. The rigid-flexible coupling structure ensures that the transmission backlash of the second backlash helical gear set is accurately controlled within a small range under high-speed forward and reverse rotation conditions, effectively eliminating the hysteresis effect of the traditional spring pressing sheet type backlash elimination mechanism. At the same time, if the bolt is loose, the spring pre-tightening force can still maintain the tooth surface contact pressure, avoiding gear shaking, and this double insurance mechanism significantly improves the system reliability.

[0042] The magnetic powder brake system 140

[0043] The magnetic powder brake system 140 comprises a magnetic powder brake 141 provided with a brake shaft 142 and a brake helical gear 143 fixedly installed on the brake shaft 142, and the brake helical gear 143 is engaged with the fourth helical gear 122.

[0044] The magnetic powder brake system 140 generates a controllable torque on the end surface of the fourth helical gear 122 through the principle of electromagnetic induction, greatly shortening the response time. When the cutter head fails or the brake is actively intervened, the control system can simultaneously cut off the power and activate the magnetic powder brake, realizing millisecond-level cooperation of mechanical braking and power disengagement. This braking mode not only avoids the powder pollution generated by the traditional friction plate brake, but also automatically adjusts the brake strength according to the cutting load due to its precise torque control characteristics, ensuring that the cutter head can realize non-shaking emergency stop in machining various materials.

[0045] The cooling liquid circulating pump 150

[0046] The box body 101 of the flat saw gear box 100 is connected with the cooling liquid circulating pump 150 on one side, and the cooling liquid is arranged in the box body 101, and the bevel gear set 130, the first backlash helical gear set 110 and the second backlash helical gear set 120 are in contact with the cooling liquid; the cooling liquid circulating pump 150 is connected with the liquid inlet and the liquid outlet arranged on the box body 101 through two pipelines.

[0047] The preferred embodiments of the present application are described above. It should be understood that the present application is not limited to the specific embodiments described above, wherein the devices and structures not described in detail should be understood as being implemented in the ordinary way in the art; any person skilled in the art, without departing from the scope of the technical scheme of the present application, can make many possible changes and modifications to the technical scheme of the present application by using the disclosed methods and technical contents, or modify equivalent embodiments, which does not affect the essential content of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical scheme of the present application, still belongs to the scope of protection of the technical scheme of the present application.

Claims

1. A flat saw gear box, the input end and the output end of the flat saw gear box (100) are connected with a driving device (200) and a cutter head (300) respectively, characterized in that, the flat saw gear box (100) is provided with: a first back-lash helical gear set (110), the first back-lash helical gear set (110) comprises a first helical gear (111) and a second helical gear (112) which are in mesh with each other, the first helical gear (111) is in transmission connection with the driving device (200); a second back-lash helical gear set (120), the second back-lash helical gear set (120) comprises a third helical gear (121) and a fourth helical gear (122) which are in mesh with each other, the third helical gear (121) is in coaxial fixed connection with the second helical gear (112), the fourth helical gear (122) is in coaxial fixed connection with the cutter head (300); wherein, one or more of the first helical gear (111), the second helical gear (112), the third helical gear (121) and the fourth helical gear (122) are provided with two pieces of helical gear blocks which are fixedly attached, and a plurality of springs (164) are arranged between the two pieces of helical gear blocks in the circumferential direction.

2. The flat bed saw gearbox of claim 1, wherein, The flat saw gear box (100) further comprises a bevel gear set (130), the bevel gear set (130) comprises a first bevel gear (131) and a second bevel gear (132) which are in mesh with each other, the first bevel gear (131) is fixedly installed on the output shaft (201) of the driving device (200), the second bevel gear (132) is in coaxial fixed connection with the first helical gear (111).

3. The flat bed saw gearbox of claim 1, wherein, The flat saw gear box (100) further comprises a magnetic powder brake system (140), the magnetic powder brake system (140) comprises a magnetic powder brake (141), the magnetic powder brake (141) is provided with a brake shaft (142) and a brake helical gear (143) which is fixedly installed on the brake shaft (142), the brake helical gear (143) is in mesh with the fourth helical gear (122).

4. The flat bed saw gearbox of claim 2, wherein, One side of the box body (101) of the flat saw gear box (100) is connected with a cooling liquid circulating pump (150), the box body (101) is provided with cooling liquid, the bevel gear set (130), the first back-lash helical gear set (110) and the second back-lash helical gear set (120) are in contact with the cooling liquid; The cooling liquid circulating pump (150) is connected with an inlet and an outlet which are opened on the box body (101) through two pipelines.

5. The flat bed saw gearbox of claim 1, wherein, The second helical gear (112) and the fourth helical gear (122) are each provided with two pieces of helical gear blocks which are fixedly attached.

6. The flat bed saw gearbox of claim 5, wherein, The spring (164) is a butterfly spring.

7. The flat bed saw gearbox of claim 5, wherein, The two pieces of helical gear blocks are a first helical gear block (160) and a second helical gear block (170); The end surface of the first helical gear block (160) in contact with the second helical gear block (170) is provided with a plurality of threaded holes (161) and a plurality of axially extending guide posts (162) and spring seats (163) in the circumferential direction, one end of the spring (164) is mounted on the spring seat (163), and the other end of the spring (164) abuts against the inner side end surface of the second helical gear block (170); The second helical gear block (170) is provided with a plurality of guide holes (172) and positioning holes (173) corresponding to the positions of the guide posts (162) and the spring seats (163) in the circumferential direction; The outer side surface of the second helical gear block (170) is provided with a pressing plate (180), and a fastening bolt (181) passes through the pressing plate (180) and is fixedly connected with the threaded hole (161) to fix the pressing plate (180) and press the second helical gear block (170).

8. The flat bed saw gearbox of claim 4, wherein, The cutter head (300) is installed in the box body (101), and a tungsten steel clamping block (102) is fixedly installed in the box body (101), and the tungsten steel clamping block (102) is provided with a gap groove matched with the gap of the two side end surfaces of the cutter head (300).

Images