Saw blade tensioning system of band sawing machine

Abstract

The utility model provides a band-sawing machine saw blade tensioning system which comprises a thread jacking mechanism and a saw blade supporting mechanism, and the thread jacking mechanism comprises a tensioning base, a tensioning nut, a tensioning screw, a guide rod and a hand wheel. The saw blade supporting mechanism comprises a sensor guide block, a pressure sensor, a sensor seat, a flywheel guide seat, a flywheel swing arm and an upper flywheel; the base is fixed on the band-sawing machine box body, the tensioning base is arranged at the lower end of the base, and the tensioning base is limited and guided by the panel and the base together. Double springs are adopted for tensioning, the springs are sufficient in elasticity, not prone to deformation and failure and long in service life, the overload capacity of the band sawing machine is greatly improved, and the service life of the saw blade is greatly prolonged. The pressure sensor is adopted to measure the actual tension, the measurement result is accurate and reliable, clear indication can be provided for a user when the saw blade is tensioned, the service life of the saw blade is further prolonged, the cutting effect is enhanced, the structural design is simple and reasonable, and use is convenient and fast.

Description

Technical Field

[0001] The utility model belongs to the technical field of fine woodworking manufacturing, and particularly relates to a saw blade tensioning system for a woodworking band sawing machine. Background Art

[0002] At present, the saw blade tensioning method of band sawing machines on the market is as follows: a single spring provides the tensioning force, and a mechanical pointer indicates the tensioning force range. Such a method has certain defects.

[0003] Defect 1: A single spring provides the tensioning force, which requires a large elastic force, making the spring prone to deformation and failure, resulting in the saw blade being in a completely rigid connection state with the machine frame during tensioning, greatly reducing the overload capacity of the band saw and the service life of the saw blade.

[0004] Defect 2: The tensioning force display relies on a mechanical pointer, with a weak indicating effect and unclear indication content. Moreover, when the spring deforms or fails, the indication direction of the pointer deviates from the actual situation, which is likely to mislead users. Content of the Utility Model

[0005] The utility model provides a saw blade tensioning system and method for a woodworking band sawing machine to solve the defects pointed out in the above-mentioned prior art.

[0006] To achieve the above object, the utility model proposes the following technical solution: A saw blade tensioning system for a band sawing machine, comprising:

[0007] A screw jacking mechanism, which includes a tensioning base (11), a tensioning nut (10), a tensioning screw (8), a guide rod (9) and a hand wheel (12);

[0008] A saw blade supporting mechanism, which includes a sensor guide block (6), a pressure sensor (5), a sensor seat (4), a flywheel guide seat (2), a flywheel swing arm (3), and an upper flywheel (19);

[0009] A base (1), which is fixed on the band sawing machine box body, and the tensioning base (11) is installed at the lower end of the base (1) and is jointly limited and guided by a wood strip (14) and the base (1).

[0010] Further, in the utility model, the tensioning screw (8) is installed at the upper end of the tensioning base (11) through a thrust ball bearing; the tensioning nut (10) is installed on the tensioning screw (8); two guide rods (9) are fixed in the side holes of the tensioning nut (10), and the other ends of the guide rods are inserted into the tensioning base (11). The guide rod (9) can slide in the tensioning base (11). The tensioning nut (10) and the sensor guide block (6) are provided with bosses, and the hand wheel (12) is fixed on the tensioning screw (8).

[0011] Furthermore, in the utility model, the flywheel guide seat (2) is mounted on the upper end of the base (1), the sensor seat (4) is fixed on the flywheel guide seat (2), the pressure sensor (5) is fixed in the sensor seat (4), the sensor guide block (6) is mounted in the sensor seat (4), and the sensor guide block (6) can slide in the sensor seat (4);

[0012] The flywheel swing arm (3) is mounted on the flywheel guide seat (2), the upper flywheel (19) is mounted on the flywheel swing arm (3), the lower flywheel (20) is fixed on the band saw box (21), and the saw blade (22) is sleeved on the upper and lower upper flywheels (19) and the lower flywheel (20).

[0013] Furthermore, the utility model also includes two tensioning springs (7), which are installed between the tensioning nut (10) and the sensor guide block (6); the inner tensioning handle seat (16) and the outer tensioning handle seat (17) are fixed on the tensioning base (11); the tensioning shaft (18) is installed between the inner tensioning handle seat (16) and the outer tensioning handle seat (17) and can rotate freely; the tensioning handle rod (15) is fixed on the tensioning shaft (18); and the tensioning handle (13) is fixed on the tensioning handle rod (15).

[0014] Furthermore, in the utility model, screws are installed beside the insert strip (14) on the base (1) to squeeze the insert strip (14) toward the tensioning base (11) and the flywheel guide seat (2) to eliminate the gap.

[0015] Beneficial effects: The technical solution of this application has the following technical effects:

[0016] The utility model adopts double spring tensioning, which has sufficient spring elasticity, is not easy to deform and fail, and has a long service life, greatly increasing the overload capacity of the band saw machine and the service life of the saw blade. A pressure sensor is used to measure the actual tensioning force, and the measurement result is accurate and reliable, which can provide clear instructions for the user when tensioning the saw blade, further increasing the service life of the saw blade and enhancing the cutting effect. The structural design is simple and reasonable, and it is convenient and quick to use.

[0017] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.

[0018] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned from the practice of the specific embodiments according to the teachings of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in each figure may be denoted by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the present utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0020] Figure 1 is a diagram of the saw blade tensioning mechanism of a band sawing machine;

[0021] Figure 2 is the overall diagram of the saw blade tensioning of a band sawing machine;

[0022] Figure 3 is a sectional view of the saw blade tensioning mechanism of a band sawing machine.

[0023] In the figures, the meanings of the various reference numerals are as follows: 1, base; 2, flywheel guide seat; 3, flywheel swing arm; 4, sensor seat; 5, pressure sensor; 6, sensor guide block; 7, tension spring; 8, tension screw; 9, guide rod; 10, tension nut; 11, tension base; 12, handwheel; 13, tension handle; 14, strip; 15, tension handle rod; 16, inner tension handle seat; 17, outer tension handle seat; 18, tension shaft; 19, upper flywheel; 20, lower flywheel; 21, box body; 22, saw blade. Specific Embodiments

[0024] In order to better understand the technical content of the present utility model, specific embodiments are hereby given and described in conjunction with the accompanying drawings as follows. In the present disclosure, aspects of the present utility model are described with reference to the accompanying drawings, in which many illustrative embodiments are shown. The embodiments of the present disclosure need not define all aspects of the present utility model. It should be understood that the various concepts and embodiments introduced above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in the present utility model are not limited to any embodiment. Additionally, some aspects of the present utility model can be used alone, or in any suitable combination with any other aspects of the present utility model that are disclosed.

[0025] As Figures 1 - 3As shown in the figure, this embodiment provides a saw blade tensioning system and method for a woodworking band saw. A screw jacking mechanism A is composed of a tensioning base 11, a tensioning nut 10, a tensioning screw rod 8, a guide rod 9 and a hand wheel 12; a saw blade support mechanism B is composed of a sensor guide block 6, a pressure sensor 5, a sensor seat 4, a flywheel guide seat 2, a flywheel swing arm 3 and an upper flywheel 19. Rotate the hand wheel 12 to drive the tensioning nut 10 to uniformly compress the two springs upward, providing a tensioning force for the saw blade; the spring 7 is extruded by the tensioning nut 10 to generate an elastic force, jacking up the saw blade support mechanism B to tension the saw blade 22. Rotate the tensioning handle 13 to drive the tensioning shaft 18 to extrude the tensioning base 11, driving the screw jacking mechanism A to further compress the spring and tension the saw blade 22. The pressure sensor 5 outputs an electrical signal, and the saw blade tensioning force value can be displayed in real time.

[0026] As Figure 2 , 3 shown, the base 1 is fixed on the band saw box body 22; the tensioning base 11 is installed at the lower end of the base 1 and is jointly limited and guided by the splint 14 and the base 1, and can only move along the guiding direction; the tensioning screw rod 8 is installed at the upper end of the tensioning base 11 through a thrust ball bearing; the tensioning nut 10 is installed on the tensioning screw rod 8; two guide rods 9 are fixed in the side holes on both sides of the tensioning nut 10, and the other ends of the guide rods are inserted into the tensioning base 11; the flywheel guide seat 2 is installed at the upper end of the base 1 and is jointly limited and guided by the splint 14 and the base 1, and can only move along the guiding direction; the sensor seat 4 is fixed on the flywheel guide seat 2; the pressure sensor 5 is fixed in the sensor seat 4; the sensor guide block 6 is installed in the sensor seat 4; two tensioning springs 7 are installed between the tensioning nut 10 and the sensor guide block 6; the inner tensioning handle seat 16 and the outer tensioning handle seat 17 are fixed on the tensioning base 11; the tensioning shaft 18 is installed between the inner tensioning handle seat 16 and the outer tensioning handle seat 17 and can rotate freely; the tensioning handle rod 15 is fixed on the tensioning shaft 18; the tensioning handle 13 is fixed on the tensioning handle rod 15; the flywheel swing arm 3 is installed on the flywheel guide seat 2; the upper flywheel 19 is installed on the flywheel swing arm 3; the lower flywheel 20 is fixed on the band saw box body 21; the saw blade 22 is sleeved on the upper and lower flywheels; the hand wheel 12 is fixed on the tensioning screw rod 8. Screws are installed at the position beside the splint 14 on the base 1 to extrude the splint 14 against the tensioning base 11 and the flywheel guide seat 2 to eliminate the gap. The sensor guide block 6 can slide in the sensor seat 4, and the sensor seat 4 provides guidance for the sensor guide block 6 to make the tensioning force vertically applied on the pressure sensor 5, ensuring the authenticity of the tensioning force value. The guide rod 9 can slide in the tensioning base 11 to provide guidance for the tensioning nut 10 to ensure that the two springs are uniformly compressed and the elastic forces are basically the same. The tensioning nut 10 and the sensor guide block 6 are provided with bosses to limit the inner ring of the spring to prevent the spring from coming out.

[0027] Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Those of ordinary skill in the technical field to which the present utility model pertains can make various modifications and refinements without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to that defined by the claims.

Claims

1. A band saw blade tensioning system, characterized in that: include: A thread lifting mechanism, the thread lifting mechanism comprising a tensioning base (11), a tensioning nut (10), a tensioning screw (8), a guide rod (9) and a hand wheel (12); A saw blade support mechanism, the saw blade support mechanism comprising a sensor guide block (6), a pressure sensor (5), a sensor seat (4), a flywheel guide seat (2), a flywheel swing arm (3), and an upper flywheel (19); The base (1) is fixed on the band saw machine housing, and the tensioning base (11) is mounted on the lower end of the base (1) and is limited and guided by the insert strip (14) and the base (1).

2. The band saw blade tensioning system according to claim 1, characterized in that: The tensioning screw (8) is mounted on the upper end of the tensioning base (11) through a thrust ball bearing; the tensioning nut (10) is mounted on the tensioning screw (8); two guide rods (9) are fixed in holes on both sides of the tensioning nut (10), and the other ends of the guide rods are inserted into the tensioning base (11). The guide rods (9) can slide in the tensioning base (11), and bosses are provided on the tensioning nut (10) and the sensor guide block (6); and a hand wheel (12) is fixed on the tensioning screw (8).

3. The band saw blade tensioning system according to claim 1, characterized in that: The flywheel guide seat (2) is mounted on the upper end of the base (1), the sensor seat (4) is fixed on the flywheel guide seat (2), the pressure sensor (5) is fixed in the sensor seat (4), the sensor guide block (6) is mounted in the sensor seat (4), and the sensor guide block (6) can slide in the sensor seat (4); The flywheel swing arm (3) is mounted on the flywheel guide seat (2), the upper flywheel (19) is mounted on the flywheel swing arm (3), the lower flywheel (20) is fixed on the band saw machine housing (21), and the saw blade (22) is sleeved on the upper and lower upper flywheels (19) and the lower flywheel (20).

4. The band saw blade tensioning system according to claim 1, characterized in that: It also includes two tensioning springs (7), which are installed between the tensioning nut (10) and the sensor guide block (6); the inner tensioning handle seat (16) and the outer tensioning handle seat (17) are fixed on the tensioning base (11); the tensioning shaft (18) is installed between the inner tensioning handle seat (16) and the outer tensioning handle seat (17) and can rotate freely; the tensioning handle rod (15) is fixed on the tensioning shaft (18); and the tensioning handle (13) is fixed on the tensioning handle rod (15).

5. The band saw blade tensioning system according to claim 1, characterized in that: Screws are installed beside the insert strip (14) on the base (1) to squeeze the insert strip (14) toward the tensioning base (11) and the flywheel guide seat (2) to eliminate the gap.

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