CN103962639A - Saw band tension adjusting mechanism of band saw - Google Patents

Abstract

The present invention relates to a saw band tension adjustment mechanism for a band saw machine, comprising a fixed seat, a lifting seat, and a control assembly. The lifting seat is arranged on the fixed seat, and can be lifted and lowered relative to the fixed seat through two opposite shafts. The control assembly has a handle and a cam block, the cam block is connected to the handle and has a large diameter portion and a small diameter portion, so that the cam block can be driven by the handle to rotate between a tightening position and a releasing position. When the cam block is located at the tightening position, the large diameter portion of the cam block pushes the lifting seat, so that the tension of the saw band is in a tightened state as the lifting seat is lifted. When the cam block is located at the releasing position, the lifting seat will drop to abut against the small diameter portion of the cam block, so that the tension of the saw band is in a relaxed state.

Description

Saw Band Tension Adjustment Mechanism for Band Saw Machine

technical field

The invention relates to a band saw machine, in particular to a saw band tension adjustment mechanism of the band saw machine.

Background technique

Before operating the band saw machine to saw the workpiece, the operator must first adjust the saw band to an appropriate tension, so as to maintain the stability during sawing and prolong the service life. As far as the conventional technology is concerned, such as Taiwan Patent No. 491118 (the following labels are quoted from the description of the aforementioned patent case), the sliding seat 20 drives the seat block 40 to slide up and down, so that the driven wheel 17 pivotally arranged on the seat block 40 can be synchronized. Rising or falling, to reach the effect of adjusting the tension of saw band 18.

However, the slide 20 provided by the above-mentioned patent is a sheet metal piece with an inverted U-shaped section. In addition to lacking sufficient structural strength, the block 40 will fall due to the excessive clearance of the slide 20 itself when the slide 20 descends. If it is too large to cause the driven wheel 17 to shake, the seat block 40 will also be affected by the same factors when the sliding seat 20 rises, causing the driven wheel 17 to deviate. In other words, the aforementioned patents have the problem of unstable operation when adjusting the tension of the saw band 18 .

Contents of the invention

In view of the above problems, the main purpose of the present invention is to provide a saw band tension adjustment mechanism of a band saw machine, which has good structural strength and operational stability.

In order to achieve the above purpose, a saw band tension adjustment mechanism for a band saw machine provided by the present invention is characterized in that it includes: a fixed seat; a lifting seat with two opposite shafts, a top plate, a bottom plate, and A wheel seat, the two shafts can axially move through the fixed seat, the top plate and the bottom plate are respectively connected to the top and bottom ends of the two shafts, and the wheel seat is arranged on the The two shafts are located between the top plate and the bottom plate; a control assembly has a handle and a cam block, and the cam block is connected to the handle and has a large diameter portion and a small diameter portion, so that the cam The block can be driven by the handle to rotate relative to the lifting seat between a tight position and a release position. When the cam block is at the tight position, the large diameter portion of the cam block pushes the The top plate of the lift seat, when the cam block is at the release position, the small diameter portion of the cam block abuts against the top plate of the lift seat.

In the above-mentioned technical solution of the present invention, the control assembly has a stopper, the stopper is fixed on the cam block and protrudes from the surface of the cam block, so as to abut against the top plate of the lifting seat .

The small diameter portion of the cam block has an abutment plane, and when the cam block is at the release position, the abutment plane of the cam block is for the top plate of the lifting seat to abut against.

It also includes a fine adjustment assembly, the fine adjustment assembly has a support plate, a coil spring, a nut, and an adjustment rod, the support plate is arranged between the two shaft rods of the lift seat and is located on the Between the wheel seat and the bottom plate, the coil spring is arranged between the wheel seat of the lifting seat and the supporting plate, the nut is fixed on the bottom plate of the lifting seat, and the adjusting rod is rotatable The bottom plate of the lifting seat and the supporting plate are pierced, and one end thereof extends into the coil spring. The adjusting rod has a threaded portion for screwing the nut.

The fine-tuning assembly also has two limit rings, and the two limit rings are respectively fixed on the two shafts of the lifting seat and located between the top plate and the wheel seat.

The fine-tuning assembly also has a rotating wheel, which is fixed at one end of the adjusting rod and is used to drive the adjusting rod to rotate.

The lifting base also has a tension pointer, one end of the tension pointer has a chute, and the supporting plate has a protruding shaft, and the protruding shaft is slidably inserted in the chute of the tension pointer.

The fine adjustment assembly also has a thrust bearing, the thrust bearing is sleeved on the adjustment rod and abuts against the bottom surface of the supporting plate.

Adopting the above-mentioned technical scheme, the lifting seat provided by the saw band tension adjustment mechanism of the present invention moves through two shafts, and when the adjusting rod rotates, it can drive the lifting seat to produce a slight displacement to achieve a fine-tuning effect, making the present invention relatively Compared with the sliding seat used in the conventional patent case, it has better structural strength and operation stability.

Description of drawings

Fig. 1 is a perspective view of a band saw machine using a preferred embodiment of the present invention;

Fig. 2 is a perspective view of a preferred embodiment of the present invention used in conjunction with a driving wheel, a driven wheel, and a saw band;

Figure 3 is a perspective view of a preferred embodiment of the present invention;

Fig. 4 is a plan view of a preferred embodiment of the present invention, mainly showing that the cam block is located at the tight position;

Fig. 5 is similar to Fig. 4, mainly showing that the cam block is in the release position;

Fig. 6 is similar to Fig. 4, and mainly shows the state of the lifting seat after fine-tuning.

Detailed ways

The structure and effect of the present invention will be described in detail by citing the following embodiments in conjunction with the accompanying drawings.

As shown in Figure 1, it is a band saw machine 10 using a saw band tension adjustment mechanism 20 according to a preferred embodiment of the present invention. The band saw machine 10 shown in the figure mainly includes an upper pedestal 11, a lower pedestal 12, a set A driven wheel 13 in the upper pedestal 11, a driving wheel 14 in the lower pedestal 12, a saw band 15 wound around the driving wheel 14 and the driven wheel 13, and a driving wheel 14 connected to the lower pedestal 12 The motor 16. Please refer to FIG. 2 and FIG. 3 , the saw band tension adjustment mechanism 20 of the present invention is located on the upper base 11 and has a fixing base 30 , an elevating base 40 , and a control component 50 .

The fixing base 30 is fixed on the upper pedestal 11 and has a first fixing block 32 and two second fixing blocks 34 , and the two second fixing blocks 34 are locked on opposite sides of the first fixing block 32 .

The lifting base 40 has two opposite shaft rods 41, a top plate 42, a bottom plate 43, and a wheel base 44, wherein: the two shaft rods 41 pass through the first fixing block 32 of the fixing base 30 and can move along the axial direction of itself. Relatively fixed seat 30 moves up and down. The top plate 42 and the bottom plate 43 are respectively connected to the top and bottom ends of the two shafts 41 , so that the top plate 42 and the bottom plate 43 can move along with the two shafts 41 . The wheel seat 44 is sheathed and fixed on the two shafts 41 and is located between the top plate 42 and the bottom plate 43 for pivoting the driven wheel 13 . Thus, the lifting base 40 can synchronously drive the driven wheel 13 to rise or fall relative to the fixed base 30 through the wheel base 44 .

The control assembly 50 has a handle 51 and a cam block 52 . The cam block 52 is sleeved on a rotating shaft 512 fixed on the handle 51 , so that the cam block 52 can rotate relative to the lifting base 40 through the driving of the handle 51 . The cam block 52 has a large diameter portion 522 and a small diameter portion 524, as shown in Figures 3 to 5, wherein the small diameter portion 524 has an abutment plane 526, in addition, the cam block 52 is provided with a stopper 53, the stopper The member 53 protrudes from the surface of the cam block 52 for abutting against the top plate 42 of the lifting base 40 to provide a positioning effect.

When the saw band 15 is to be disassembled, the handle 51 is first pulled down to rotate the cam block 52 to a release position P1, as shown in Figures 3 and 5, at this time the lifting seat 40 will drop to lean against the position due to its own weight. The small-diameter portion 524 of the cam block 52 abuts against the plane 526 so that the distance between the driven wheel 13 and the driving wheel 14 will be shortened as the wheel seat 44 descends, so that the saw band 15 will appear in a loose state. In order to facilitate the disassembly of the saw band 15 by the operator.

Conversely, when the saw band 15 is to be installed, the handle 51 is pulled upwards to rotate the cam block 52 to a tight position P2, as shown in Figures 3 and 4, at this time the stopper 53 will abut against The positioning of the cam block 52 is completed on the top plate 42 of the lifting base 40. At the same time, the lifting base 40 will be lifted up by the push of the large diameter part 522 of the cam block 52, and will be driven synchronously by the wheel seat 44 during the lifting process. The driving wheel 13 is far away from the driving wheel 14, in this case, the saw band 15 will be supported by the driven wheel 13 and present a tense state, so as to perform sawing operations.

In addition, in order to adjust the tension of the saw band 15 to an appropriate tightness, the saw band tension adjustment mechanism 20 of the present invention further provides a fine adjustment assembly 60, the fine adjustment assembly 60 has a supporting plate 61, a coil spring 62, a Nut 63, an adjustment rod 64, a thrust bearing 65, and a runner 66, as shown in Figure 3 and Figure 6, wherein:

The supporting plate 61 is sandwiched between the two shafts 41 of the lifting base 40 and is located between the wheel base 44 and the bottom plate 43. The coil spring 62 is arranged between the supporting plate 61 and the wheel base 44 of the lifting base 40; the nut 63 is fixed On the bottom plate 43 of the lifting seat 40; the adjusting rod 64 is rotatably passed through the supporting plate 61 and the bottom plate 43 of the lifting seat 40, and extends into the coil spring 62 with one end thereof. The adjusting rod 64 has a threaded portion 642 for A nut 63 is screwed; a thrust bearing 65 is sleeved on the adjustment rod 64 and abuts against the bottom surface of the supporting plate 61; turn.

During operation, the rotating wheel 66 is used to drive the adjusting rod 64 to rotate. Because the nut 63 is fixed, the adjusting rod 64 will move upward along its own axial direction, and will be pushed upward by the thrust bearing 65 during the movement. Supporting plate 61, then supporting plate 61 will squeeze the coil spring 62, and the squeezed coil spring 62 will push up the top wheel seat 44, so that the driven wheel 13 will move upward, as shown in Figure 6, to achieve fine-tuning of the tightness degree of effect.

What needs to be supplemented here is that, in order to limit the upward movement of the wheel base 44, the lifting base 40 also has two limit rings 45, and each limit ring 45 is fixed on the shaft rod 41 and is located between the top plate 42 and the wheel base 44. In order to block the wheel seat 44, the wheel seat 44 can only move slightly when being pushed by the coil spring 62. In addition, the lifting base 40 also has a tension pointer 46, the tension pointer 46 is pivotally arranged on the upper platform 11 and has a sliding groove 462 at one end thereof, and the supporting plate 61 has a protruding shaft 612 for slidably inserted in the tension The slide groove 462 of the pointer 46 enables the tension pointer 46 to pivot as the support plate 61 moves up and down, and is used to cooperate with a scale (not shown in the figure) to indicate the current tightness of the saw band 15 .

To sum up, the lifting seat 40 provided by the saw band tension adjustment mechanism 20 of the present invention moves through two shafts 41, and has better structural strength and operation than the sliding seat used in conventional patents. Stability, to achieve the purpose of the present invention.

Finally, the constituent elements disclosed in the foregoing embodiments of the present invention are for illustration only and are not intended to limit the scope of patent protection of this case. The substitution or change of other equivalent elements should also be covered by the scope of protection of this patent.

Claims (8)

1. a saw band tension adjustment mechanism for band sawing machine, is characterized in that including:

One holder;

One elevating bracket, there are two relative axostylus axostyle, a top board, base plates, an and wheel seat, described two axostylus axostyles can axially movably be arranged in described holder, described top board and described base plate are connected to top, the two ends, the end of described two axostylus axostyles, and described wheel seat is located at described two axostylus axostyles and between described top board and described base plate;

One Control Component, there is leader and a cam bit, described cam bit connects described handle and has a large-diameter portion and minor diameter part, described cam bit can be rotated relative to described elevating bracket by the driving of described handle between a packing position and an off-position, in the time that described cam bit is positioned at described packing position, the top board of elevating bracket described in the large-diameter portion ejection of described cam bit, in the time that described cam bit is positioned at described off-position, the minor diameter part of described cam bit is connected to the top board of described elevating bracket.

2. the saw band tension adjustment mechanism of band sawing machine as claimed in claim 1, is characterized in that: described Control Component has a stop part, and described stop part is fixed on described cam bit and protrudes from the surface of described cam bit, to be connected to the top board of described elevating bracket.

3. the saw band tension adjustment mechanism of band sawing machine as claimed in claim 1, it is characterized in that: the minor diameter part of described cam bit has one against plane, in the time that described cam bit is positioned at described off-position, described cam bit against plane for the top board of described elevating bracket against.

4. the saw band tension adjustment mechanism of band sawing machine as claimed any one in claims 1 to 3, it is characterized in that: also include a trimming assembly, described trimming assembly has a supporting plate, one helical spring, one nut, an and adjusting lever, described supporting plate is located between described two axostylus axostyles of described elevating bracket and between described wheel seat and described base plate, described helical spring is located between the wheel seat and described supporting plate of described elevating bracket, described nut is fixed on the base plate of described elevating bracket, described adjusting lever can be arranged in base plate and the described supporting plate of described elevating bracket rotationally, and stretch in described helical spring with its one end, described adjusting lever has a threaded portion, establish described nut for spiral shell.

5. the saw band tension adjustment mechanism of band sawing machine as claimed in claim 4, is characterized in that: described trimming assembly also has two spacing rings, and described two spacing rings are individually fixed in two axostylus axostyles of described elevating bracket and between described top board and described wheel seat.

6. the saw band tension adjustment mechanism of band sawing machine as claimed in claim 4, is characterized in that: described trimming assembly also has a runner, described runner is fixed on one end of described adjusting lever, for driving described adjusting lever to rotate.

7. the saw band tension adjustment mechanism of band sawing machine as claimed in claim 4, it is characterized in that: described elevating bracket also has a tension force pointer, one end of described tension force pointer has a chute, and described supporting plate has a protruding axle, and described protruding axle can be inserted in the chute of described tension force pointer slippingly.

8. the saw band tension adjustment mechanism of band sawing machine as claimed in claim 4, is characterized in that: described trimming assembly also has a thrust bearing, and described thrust bearing is sheathed on described adjusting lever and is connected to the bottom surface of described supporting plate.