TWI719910B - Cutting apparatus - Google Patents

Abstract

A cutting apparatus includes a platform, a pivot assembly, and a portable band saw. The platform has a fixed base, the pivot assembly has a pivot base and a spring member. The pivot base is pivotally mounted to the fixed base by a pivot shaft such that the pivot base is pivotally rotatable relative to the platform. The spring member is sleeved on the pivot shaft and sandwiched between a front lateral surface of the fixed base and a head portion of the pivot shaft to continuously provide a resilient force to push the pivot shaft outwardly for eliminating a gap formed between the pivot base and fixed base, such that the fixed base and the pivot base are stable during cutting operation. Therefore, the cutting stability and user safety are enhanced.

Description

Sawing device

The present invention relates to a sawing device, in particular to a sawing device that can improve the stability of sawing.

For the current portable sawing devices (such as portable circular saws or portable band saws), in operation, the workpiece to be processed is mainly fixed on the working platform, and then the machine is controlled to pivot up and down relative to the working platform. , So that the saw blade will follow the machine to produce up and down movements, so as to perform sawing processing on the workpiece.

However, in the traditional design, the pivotal joint between the machine table and the working platform is prone to shaking or loosening due to the gap problem, resulting in the deviation of the saw blade's lifting route, which affects the accuracy of the sawing, and may even affect it. To the safety of the job.

The main purpose of the present invention is to provide a sawing device which can improve the stability of sawing.

In order to achieve the above-mentioned main purpose, the sawing device of the present invention includes a working platform, a pivot assembly, and a band saw. The top surface of the working platform has a fixed seat, the fixed seat has a pivot hole; the pivot assembly has a pivot seat, a pivot and a spring, the pivot seat is adjacent to the rear side of the fixed seat, the The pivot has a head and a shaft. The shaft rotatably passes through the pivot hole of the fixing seat. The front end of the shaft protrudes out of the pivot hole of the fixing seat and is connected to the head. The rear half of the part protrudes out of the pivot hole of the fixed seat and is connected to the pivot seat, so that the pivot seat can pivot relative to the working platform with the pivot shaft as the axis, and the spring is sleeved on the pivot shaft The shaft part abuts between the front side of the fixed seat and the head of the pivot to provide elastic force to push the pivot away from the fixed seat, so that the pivot seat is driven by the pivot And close to the fixed seat; the band saw machine is located above the working platform and assembled on the pivot seat, so that the band saw machine can follow the pivot seat to pivot up and down relative to the working platform.

It can be seen from the above that the structural configuration of the sawing device of the present invention helps to eliminate the gap between the pivot seat and the fixed seat, so that the two are not easy to shake and loose during operation, thereby improving the stability of sawing. And the purpose of increasing the safety of use.

Preferably, the pivot seat has a shaft hole, the shaft hole is sleeved on the rear half of the shaft portion of the pivot, the rear side of the pivot seat has a countersunk groove communicating with the shaft hole, and the pivot assembly is more It has a thrust bearing and a nut, the thrust bearing is sleeved on the rear end of the shaft portion of the pivot and is set in the countersunk groove of the pivot seat, and the nut is set on the shaft portion of the pivot And abut against the thrust bearing.

Preferably, the pivoting assembly further has a shim, and the shim is arranged between the fixing seat and the pivoting seat to reduce wear between the two.

Preferably, the fixing seat has a pin hole, the fixing seat has an upper positioning hole and a lower positioning hole, and the sawing device further has a positioning pin, which is axially movable and penetrates the pin. In the hole and can be inserted into the upper positioning hole or the lower positioning hole alternatively, when the positioning pin is not inserted in either of the two, the band saw machine can pivot up and down relative to the working platform for sawing When the positioning pin is inserted in the upper positioning hole, the band saw machine is inclined at an angle relative to the working platform to facilitate the maintenance and replacement of components (such as saw bands). When the positioning pin is inserted in the lower When positioning the hole, the exposed part of the saw band is accommodated in a saw slot of the working platform, which facilitates storage and positioning on the one hand, and prevents personnel from being cut by the saw band on the other hand.

Preferably, the outer peripheral surface of the positioning pin has a ring groove, a stop ring is embedded in the ring groove, and the hole wall of the pin hole has a flange. When the positioning pin is pulled outward, the convex The edge blocks the stop ring from passing to prevent the positioning pin from falling out.

Preferably, one end of the pivot seat is locked with a dovetail groove seat, the dovetail groove seat has a dovetail groove, the outer peripheral surface of the driving wheel housing of the band saw is locked with a dovetail tenon, and the dovetail tenon is embedded In the dovetail groove of the dovetail groove seat, the band saw machine is detachably assembled on the fixed seat of the working platform.

Preferably, the top surface of the dovetail groove seat is fixed to a knob seat, the knob seat is fixed to one end of the pivot seat and has a screw hole penetrating through the top and bottom surfaces, and the dovetail groove seat has a through top and bottom For the two-sided perforation, a knob is screwed into the screw hole and passed through the perforation, and then the end is pressed against the top surface of the dovetail to complete the tight positioning of the dovetail.

The detailed structure, characteristics, assembling or use of the sawing device provided by the present invention will be described in the detailed description of the following implementation manners. However, those with ordinary knowledge in the field of the present invention should be able to understand that the detailed description and the specific embodiments listed for implementing the present invention are only used to illustrate the present invention, and are not intended to limit the scope of the patent application of the present invention.

The applicant first explains here that throughout the specification, including the embodiments described below and the claims in the scope of the patent application, the nouns related to directionality are based on the directions in the drawings. Secondly, in the following embodiments and drawings, the same element numbers represent the same or similar elements or their structural features.

Please refer to FIGS. 1 and 2, the sawing device 10 of the present invention includes a working platform 20, a pivot assembly 30, and a band saw machine 50.

The top surface of the working platform 20 has a saw groove 21 extending in the left and right direction at the center position. The top surface of the working platform 20 has a fixing seat 22 at the lower left corner. The fixing seat 22 has a pivot hole 23 and a pivot hole 23. The pin hole 24 on the right has a flange 25 on the hole wall of the pin hole 24 (as shown in FIG. 6).

The pivot assembly 30 has a pivot seat 31 and a pivot 37. The pivot seat 31 is adjacent to the rear side of the fixed seat 22 and has a shaft hole 32, a positioning hole 33 located above and to the right of the shaft hole 32, and a positioning hole 34 located below the upper positioning hole 33, behind the pivot seat 31 There is a countersunk groove 35 connected to the shaft hole 32 on the side (as shown in FIG. 5), and a thrust bearing 36 is provided in the countersunk groove 35. The pivot 37 has a head 38 and a shaft 39. The shaft 39 is sleeved with a bush 40. The front half of the shaft 39 is rotatably inserted into the pivot hole 23 of the fixing seat 22. The shaft 39 The front end protrudes out of the pivot hole 23 of the fixing seat 22 and is integrally connected to the head 38, and the rear half of the shaft 39 protrudes out of the pivot hole 23 of the fix seat 22 and penetrates the shaft hole of the pivot seat 31 In 32, the rear end of the shaft 39 passes through the thrust bearing 36 and is screwed with a nut 41 that abuts against the thrust bearing 36, so that the pivot 37 and the pivot seat 31 are fixed together. Thereby, the pivot seat 31 can pivot up and down relative to the working platform 20 with the pivot shaft 37 as the axis.

In addition, the pivot assembly 30 further has a spring 42. The spring 42 (a disc spring is taken as an example here, but not limited to this) is sleeved on the shaft portion 39 of the pivot 37, and the front end of the spring 42 directly abuts against The head 38 of the pivot 37 and the rear end of the spring 42 indirectly abut the front side of the fixing seat 22 through a washer 43. Thereby, the spring 42 provides elastic force to push the pivot 37 and the nut 41 forward together, and then the thrust bearing 36 receives the axial thrust from the nut 41, and transmits this thrust to the pivot seat 31, so that The front side of the pivot seat 31 is close to the rear side of the fixed seat 22, so that the gap between the two can be eliminated. However, in order to reduce the noise or surface wear that may be generated when the two are relatively pivoted, a gasket 44 made of plastic or rubber can be added between the fixed seat 22 and the pivot seat 31. The gasket 44 needs to have a circular hole 45 connecting the pivot hole 23 and the shaft hole 32 and an arc groove 46 connecting the upper positioning hole 33 and the lower positioning hole 34.

The band saw machine 50 is located above the working platform 20 and has a saw band 51. The saw band 51 is driven by a driving wheel (not shown in the figure) to pull the driven wheel (not shown in the figure) to generate synchronous rotation, so that the saw band 51 can continue The work piece is sawed during operation. The driving wheel is arranged in a driving wheel housing 52, and the driven wheel is arranged in a driven wheel housing 53, because the detailed structure and operating principle of the band saw machine 50 are all known technologies. And it is not the focus of this case, so I won't repeat it here. As shown in Figures 2 to 4, the band saw machine 50 is assembled on the fixing seat 22 of the working platform 20 through a mounting assembly 60. Furthermore, the mounting assembly 60 has a knob seat 61, a dovetail groove seat 63, and a A dovetail 66 and a knob 68, wherein: the knob seat 61 is locked on the left end surface of the pivot seat 31 with two upper and lower screws 72, and the knob seat 61 has a screw hole 62 penetrating through the top and bottom surfaces; the dovetail groove seat 63 Use two upper and lower screws 73 to lock on the bottom surface of the knob seat 61. The bottom surface of the dovetail groove seat 63 has a dovetail groove 64, and the dovetail groove seat 63 has a perforation 65 connecting the dovetail groove 64; the dovetail 66 uses upper and lower screws 74 is locked on the outer peripheral surface of the driving wheel housing 52, and the dovetail 66 is embedded in the dovetail groove 64 of the dovetail groove seat 63, so that the band saw machine 50 is detachably assembled on the fixing seat 22 of the working platform 20 The knob 68 is screwed in the screw hole 62 and passes through the perforation 65, and its end abuts against a bearing groove 67 of the dovetail 66 to complete the tight positioning of the dovetail 66.

In addition, the mounting assembly 60 further has a positioning pin 69 that is inserted into the pin hole 24 of the fixing base 22. The outer circumference of the positioning pin 69 has a ring groove 70, and a stop ring 71 is embedded in the ring groove 70. The outer diameter of the stop ring 71 is greater than the outer diameter of the flange 25, so that when the positioning pin 69 is pulled out, the stop ring 71 can abut the flange 25 to prevent the positioning pin 69 from falling out. Thereby, when the positioning pin 69 is pulled out without being inserted into the upper positioning hole 33 or the lower positioning hole 34, as shown in FIGS. 6 and 9, the band saw machine 50 can pivot 37 through the pivot seat 31 For the axis to pivot up and down relative to the working platform, in order to perform sawing operations through the saw band 51; when the positioning pin 69 is pushed in and inserted into the upper positioning hole 33, as shown in FIG. 10, the band saw 50 is opposite The working platform 20 is in a tilted arrangement as shown in Figure 11 to facilitate the maintenance and replacement of components (such as the saw band 51); when the positioning pin 69 is pushed in and inserted into the lower positioning hole 34, as shown in the figure As shown in 7, the band saw machine 50 is arranged horizontally with respect to the work platform 20 as shown in Fig. 8, so that the exposed part of the saw band 51 is accommodated in the saw groove 21 of the work platform 20, which is convenient for storage and positioning, and on the other hand On the one hand, people are prevented from being cut by the saw band 51. In other words, when the band saw machine 50 is to be used, the user needs to pull out the positioning pin 69. When the band saw machine 50 is not used, the user needs to insert the positioning pin 69 into the lower positioning hole 34. When the component (for example, the saw band 51) is repaired and replaced, the user needs to insert the positioning pin 69 into the upper positioning hole 33.

It can be seen from the above that the sawing device 10 of the present invention can effectively eliminate the gap between the pivot seat 31 and the fixed seat 22, so that the two are not easy to shake and loose during operation, thereby improving the stability of sawing and increasing the use. The purpose of security. In addition, the sawing device 10 of the present invention further utilizes the combination of the positioning pin 69 and the upper and lower positioning holes 33, 34, so that the user can switch the state according to actual needs, so as to increase the convenience of use.

10: Sawing device 20: work platform 21: Saw groove 22: fixed seat 23: pivot hole 24: pin hole 25: flange 30: pivot assembly 31: pivot seat 32: Shaft hole 33: Upper positioning hole 34: Lower positioning hole 35: countersunk 36: Thrust bearing 37: pivot 38: head 39: Shaft 40: Bushing 41: Nut 42: spring 43: Washer 44: Gasket 45: round hole 46: Arc Groove 50: Band saw machine 51: saw band 52: driving wheel housing 53: driven wheel shell 60: Install components 61: Knob seat 62: screw hole 63: Dovetail slot seat 64: Dovetail Slot 65: Piercing 66: Dovetail 67: Socket 68: Knob 69: positioning pin 70: ring groove 71: stop ring 72: Screw 73: Screw 74: Screw

Figure 1 is a perspective view of the sawing device of the present invention. Figure 2 is a partial three-dimensional exploded view of the working platform and band saw provided by the sawing device of the present invention. Figure 3 is a cross-sectional view, which mainly shows that the end of the knob presses against the supporting groove of the dovetail tenon. Fig. 4 is a perspective exploded view of the pivot assembly provided by the sawing device of the present invention. Fig. 5 is a cross-sectional view of the pivot assembly provided by the sawing device of the present invention. Fig. 6 is a cross-sectional view, mainly showing a state where the positioning pin is separated from the lower positioning hole. Fig. 7 is similar to Fig. 6 and mainly shows the state where the positioning pin is inserted into the lower positioning hole. Fig. 8 is a front view of the sawing device of the present invention, which mainly shows the state of the band saw machine arranged horizontally. Fig. 9 is similar to Fig. 6 and mainly shows the state where the positioning pin is separated from the upper positioning hole. Fig. 10 is similar to Fig. 7 and mainly shows the state where the positioning pin is inserted into the upper positioning hole. Fig. 11 is similar to Fig. 8 and mainly shows the state of the band saw machine in a tilted arrangement.

20: work platform

22: fixed seat

23: pivot hole

24: pin hole

31: pivot seat

32: Shaft hole

33: Upper positioning hole

34: Lower positioning hole

36: Thrust bearing

37: pivot

38: head

39: Shaft

40: Bushing

41: Nut

42: spring

43: Washer

44: Gasket

45: round hole

46: Arc Groove

61: Knob seat

62: screw hole

63: Dovetail slot seat

64: Dovetail Slot

65: Piercing

68: Knob

69: positioning pin

70: ring groove

71: stop ring

72: Screw

73: Screw

Claims (8)

A sawing device including: A working platform, the top surface of the working platform has a fixed seat, and the fixed seat has a pivot hole; A pivot assembly has a pivot seat, a pivot and a spring. The pivot seat is adjacent to the rear side of the fixed seat. The pivot has a head and a shaft. The shaft rotatably passes through The pivot hole of the fixing seat, the front end of the shaft part protrudes out of the pivot hole of the fixing seat and is connected to the head, and the rear half section of the shaft part protrudes out of the pivot hole of the fixing seat and is connected to the pivot seat , So that the pivot seat can pivot relative to the working platform with the pivot shaft as the axis, the spring is sleeved on the shaft portion of the pivot shaft and abuts between the front side of the fixed seat and the head of the pivot shaft ;as well as A band saw machine is located above the working platform and assembled on the pivot seat, so that the band saw machine can pivot up and down relative to the working platform following the pivot seat. The sawing device according to claim 1, wherein the pivot seat has a shaft hole, the shaft hole is sleeved on the rear half of the shaft portion of the pivot, and the rear side of the pivot seat has a shaft hole communicating with the shaft hole A countersunk groove, the pivot assembly has a thrust bearing and a nut. The thrust bearing is sleeved on the rear end of the shaft of the pivot and is arranged in the countersunk groove of the pivot seat. The screw The cap is arranged at the rear end of the shaft part of the pivot and abuts against the thrust bearing. The sawing device according to claim 1, wherein the pivoting assembly further has a gasket, and the gasket is arranged between the fixing seat and the pivoting seat. The sawing device according to claim 1, wherein the top surface of the working platform has a saw groove, the band saw machine has a saw band, the fixing base has a pin hole, and the fixing base has an upper positioning hole and The lower positioning hole, the sawing device has a positioning pin, the positioning pin is axially movable through the pin hole and can be inserted into the upper positioning hole or the lower positioning hole alternatively, when the positioning When the pin is inserted in the upper positioning hole, the band saw machine is inclined at a predetermined angle relative to the working platform, and the saw band leaves the saw groove. When the positioning pin is inserted in the lower positioning hole, a part of the saw band It is contained in the saw slot. The sawing device according to claim 4, wherein the positioning pin has a ring groove on the outer periphery, a stop ring is embedded in the ring groove, and the hole wall of the pin hole has a hole for blocking the stop ring from passing The flange. The sawing device according to claim 1, wherein the band saw machine is assembled on the fixing seat of the working platform through a mounting assembly, the mounting assembly has a dovetail groove seat and a dovetail tenon, and the dovetail groove seat is arranged at The pivot seat has a dovetail groove, and the dovetail tenon is fixedly connected to the outer peripheral surface of a driving wheel shell of the band saw machine and is detachably embedded in the dovetail groove. The sawing device according to claim 6, wherein a knob seat is fixed to the top surface of the dovetail groove seat, and the knob seat is fixed to one end of the pivot seat and has a screw hole penetrating through the top and bottom surfaces, The dovetail groove seat has a perforation penetrating through the top and bottom surfaces, and the knob seat is screwed in the screw hole and passes through the perforation and abuts against the top surface of the dovetail with its end. The sawing device according to claim 1, wherein the spring is a disc spring.

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