A saw bow upper swing limiting device of a sawing machine

Abstract

This utility model relates to a saw bow upper swing limiting device for a sawing machine, belonging to the component structure of a sawing machine. The sawing machine includes a sawing machine base, a saw bow frame, and a saw bow lifting hydraulic cylinder. One end of the saw bow frame is hinged to one side of the sawing machine base. The saw bow lifting hydraulic cylinder is located between the saw bow frame and the sawing machine base. It also includes a bracket, a rotating shaft, a rotation limiter, a torsion spring, and a limit pin. The bracket is installed on the outside of the saw bow frame hinge position on the sawing machine base. The bracket extends outwards in a suspended manner, and a lower longitudinal hole is opened at the extended end. The rotating shaft is installed in the lower longitudinal hole, and the rotation limiter is installed on the upper part of the rotating shaft. A torsion spring is installed between the rotation limiter and the rotating shaft. This device has a simple structure, low cost, reliability, durability, is unaffected by electrical interference, has a stable mechanical structure, and can effectively prevent the saw bow from being excessively lifted, affecting the operator's personal safety.

Description

Technical Field

[0001] This utility model relates to a saw bow upper swing limiting device for a sawing machine, which belongs to the component structure of a sawing machine. Background Technology

[0002] Traditional saws lack limit devices and rely on hydraulic cylinders to control the lifting of the saw bow. Each time the bow reaches the desired height, the hydraulic cylinder must be locked, making operation inconvenient. Furthermore, there are no limits on the direction of bow tilting, posing a safety hazard. Therefore, adding a limit device is necessary and effective.

[0003] The limiting structure needs to achieve limiting in both the tilted and vertical states of the saw bow, in order to replace the positioning purpose when the hydraulic system stops.

[0004] There is currently no suitable standardized limit structure. Summary of the Invention

[0005] This invention provides a saw bow upper swing limiting device for a sawing machine, which solves the limiting support problem when the saw bow is tilted or in a vertical state.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a saw bow upper swing limiting device for a sawing machine, the sawing machine including a sawing machine base, a saw bow frame, and a saw bow lifting hydraulic cylinder, one end of the saw bow frame is hinged to one side of the sawing machine base, and the saw bow lifting hydraulic cylinder is arranged between the saw bow frame and the sawing machine base, characterized in that... It also includes a bracket, a rotating shaft, a rotation limiter, a torsion spring, and a limit pin. The bracket is installed on the outside of the saw frame hinge position on the base of the saw. The bracket extends outward in a suspended manner and has a lower longitudinal hole at the end of the extension. The rotating shaft is installed in the lower longitudinal hole. The rotation limiter is installed on the upper part of the rotating shaft. A torsion spring is installed between the rotation limiter and the rotating shaft. The rotation limiter includes a lower rotating part and an upper limiting part. The rotating part has a hole through which the rotating shaft passes and the torsion spring is installed. The limiting part is located at the edge of the rotating part. The top of the rotating part is a rotating inclined surface facing the saw frame. A limit hole is provided on the lower side of the rotating part. A limit pin is installed in the limit hole. The limit pin restricts the rotation of the rotation limiter when the inclined surface of the rotating part faces the saw frame.

[0007] According to the saw bow upper swing limiting device of the sawing machine, the saw bow frame is set on one side of the base, the support extends toward the side of the base, the rotation limit is rotated toward the support under the drive of the torsion spring, the limiting pin abuts against the edge of the support to limit the rotation limit, and the position abuts against the limiting part when the saw bow frame is tilted.

[0008] According to the saw bow upper swing limit device of the sawing machine, the bracket is integrally formed of high-strength alloy material, and the bracket has two horizontal mounting holes that are fixed to the base by bolts.

[0009] According to the saw bow upper swing limit device of the sawing machine, the rotating part has an upper longitudinal hole, the rotating shaft is installed in the upper longitudinal hole, the top of the rotating shaft has a screw hole, the upper part of the longitudinal shaft is a torsion spring, the upper part of the torsion spring is an upper pressure cover, the upper pressure cover has a hole in the middle, the bolt passes through the hole of the upper pressure cover and then through the torsion spring to be fixed in the screw hole at the top of the rotating shaft, the side of the rotating part has a groove to embed one end of the torsion spring, and the other end of the torsion spring passes through the hole of the pressure cover 6.

[0010] According to the saw bow upper swing limiting device of the sawing machine, a shim is provided between the rotating part and the support, and the rotating shaft passes through the shim.

[0011] According to the saw bow upper swing limit device of the sawing machine, the lower part of the rotating shaft is a threaded structure, the upper longitudinal hole of the bracket is a through hole, and the threaded structure of the lower part of the rotating shaft passes through the through hole and is fixed with a nut.

[0012] It has a simple structure, low cost, is reliable and durable, is not affected by electrical interference, and has a stable mechanical structure, which can effectively prevent the saw bow from being raised excessively and affecting the operator's personal safety. Attached Figure Description

[0013] Figure 1 This is a diagram showing the installation position of this utility model on a saw. Figure 2 This is a partially enlarged view of this utility model. Figure 3 This is a structural diagram of the inclined limiting state of the saw frame of this utility model. Figure 4 This is the utility model Figure 3 Mid-top view of partial structure, Figure 5 This is a structural diagram of the saw frame of this utility model in its vertical limiting state. Figure 6 This is the utility model Figure 5 Mid-top view of a partial structure.

[0014] Figure label: 1. Bracket, 2. Rotary shaft, 3. Rotation limit, 31. Rotating part, 32. Limiting part, 33. Inclined surface, 34. Slot, 4. Torsion spring, 5. Limiting pin, 6. Upper pressure cover, 7. Gasket, 8. Sawing machine base, 9. Sawing bow frame, 10. Sawing bow lifting hydraulic cylinder. Detailed Implementation

[0015] The specific structure of this utility model will be further described below: This utility model relates to a saw bow upper swing limiting device for a sawing machine. The sawing machine includes a sawing machine base 8, a saw bow frame 9, and a saw bow lifting hydraulic cylinder 10. One end of the saw bow frame 9 is hinged to one side of the sawing machine base 8, and the saw bow lifting hydraulic cylinder 10 is arranged between the saw bow frame 9 and the sawing machine base 8. The limiting components include a bracket 1, a rotating shaft 2, a rotation limiter 3, a torsion spring 4, and a limiting pin 5. The bracket 1 is installed on the outside of the saw frame 9 hinge position on the base 8 of the saw. The bracket 1 extends outward in a suspended manner and has a lower longitudinal hole at the end of the extension. The rotating shaft 2 is installed in the lower longitudinal hole. The rotation limiter 3 is installed on the upper part of the rotating shaft 2. The torsion spring 4 is installed between the rotation limiter 3 and the rotating shaft 2. The rotation limiter 3 includes a lower rotating part 31 and an upper limiting part 32. The rotating part 31 has a hole that passes through the rotating shaft 2 and installs the torsion spring 4. The limiting part 32 is located at the edge of the rotating part 31. The top of the rotating part 31 is a rotating inclined surface 33 facing the saw frame 9. The lower side of the rotating part 31 has a limiting hole, in which the limiting pin 5 is installed. The limiting pin 5 restricts the rotation of the rotation limiter 3 when the inclined surface 33 of the rotating part 31 faces the saw frame 9.

[0016] In this device, the saw frame 9 is located on one side of the base 32. The support 1 extends toward the base in this lateral direction. The rotation limit 3 is rotated toward the support 1 under the drive of the torsion spring 4. The limit pin 5 abuts against the edge of the support 1 to limit the rotation limit 3. When the saw frame 9 is tilted at this position, it abuts against the limit part 32.

[0017] The bracket 1 of this device is integrally formed from high-strength alloy material. The bracket 1 has two horizontal mounting holes and is fixed to the base by bolts.

[0018] The rotating part 31 has an upper longitudinal hole, in which the rotary shaft 2 is installed. A threaded hole is located at the top of the rotary shaft 2. Above the longitudinal shaft is a torsion spring 4, and above the torsion spring 4 is an upper pressure cover 6. The upper pressure cover 6 has a hole in the middle. A bolt passes through the hole in the upper pressure cover 6 and then through the torsion spring 4 to be fixed in the threaded hole at the top of the rotary shaft 2. A groove is cut on the side of the rotating part 31 to embed one end of the torsion spring 4, and the other end of the torsion spring 4 passes through the hole in the upper pressure cover. When the limiting part quickly resets, the limiting pin stops when it touches the inside of the bracket. This structure allows the limiting block to quickly reset under the action of the torsion spring.

[0019] A washer 7 is provided between the rotating part 31 and the bracket 1, and the rotating shaft 2 passes through the washer 7. The lower part of the rotating shaft 2 has a threaded structure, the upper longitudinal hole of the bracket 1 is a through hole, and the threaded structure of the lower part of the rotating shaft 2 passes through the through hole and is fixed with a nut.

[0020] The working principle of this utility model is as follows: When the rotation limit is in the absence of interference, from a top-down angle, the torsion spring drives the rotation counterclockwise, and the limit pin contacts the bracket. At this time, the limit surface of the limit part is tilted towards the saw frame. When the saw frame is lifted by the hydraulic cylinder for lifting the saw frame, the side of the saw frame touches the limit surface of the limit part of the limit device, and the saw frame stops rotating backward and stops stably in the safe area. In this state, the maximum processing capacity of horizontal sawing can be met.

[0021] If the limiting part is rotated clockwise at this point, it will become parallel to the swing surface of the saw frame. The saw frame can then continue to rotate upwards and backwards until it is placed vertically, at which point it can be used as a vertical saw, achieving both vertical and horizontal operation. This two-mode saw can meet different processing requirements.

[0022] When the saw frame rotates downwards to a horizontal machining position, the limit block can automatically reset to its initial limit position under the action of the torsion spring, thus playing a protective role during installation.

[0023] The upper pressure cover is fixedly connected to the rotating shaft by screws, and the fixed shaft is in turn fixed to the bracket. Rotating the angle of the upper pressure cover can adjust the elastic force of the torsion spring. When the saw bow section is raised, the saw bow frame touches the limit block, and the saw bow section stops rotating.

[0024] By moving the limit block to one side, the swing arm can lie horizontally on the limit block, and the saw bow is in a vertical position. This enables the sawing function of a vertical saw, achieving two uses in one machine; when the saw bow is rotated downwards to horizontal processing, the limit part can automatically return to the initial limit position under the action of the torsion spring.

Claims

1. A saw bow upper swing limiting device for a sawing machine, the sawing machine including a sawing machine base (8), a saw bow frame (9) and a saw bow lifting hydraulic cylinder (10), one end of the saw bow frame (9) is hinged to one side of the sawing machine base (8), and the saw bow lifting hydraulic cylinder (10) is arranged between the saw bow frame (9) and the sawing machine base (8), characterized in that, It also includes a bracket (1), a rotating shaft (2), a rotation limiter (3), a torsion spring (4), and a limit pin (5). The bracket (1) is installed on the outside of the hinged position of the saw frame (9) on the base (8) of the saw. The bracket (1) extends outward in a suspended manner and has a lower longitudinal hole at the end of the extension. The rotating shaft (2) is installed in the lower longitudinal hole. The rotation limiter (3) is installed on the upper part of the rotating shaft (2). The torsion spring (4) is installed between the rotation limiter (3) and the rotating shaft (2). The rotation limiter (3) includes a lower rotating part (31) and an upper rotating part. The limiting part (32) has a hole through which the rotating shaft (2) is installed and the torsion spring (4) is installed. The limiting part (32) is located at the edge of the rotating part (31). The top of the rotating part (31) is a rotating inclined surface (33), which faces the saw frame (9). The lower side of the rotating part (31) is provided with a limiting hole, in which a limiting pin (5) is installed. The limiting pin (5) at the position of the inclined surface (33) of the rotating part (31) facing the saw frame (9) restricts the rotation of the rotating limit (3).

2. The saw bow upper swing limiting device of the sawing machine according to claim 1, characterized in that, The saw frame (9) is located on one side of the base. The bracket (1) extends toward the side of the base. The rotation limit (3) is driven by the torsion spring (4) and rotates toward the bracket (1). The limit pin (5) abuts against the edge of the bracket (1) to limit the rotation limit (3). When the saw frame (9) is tilted at this position, it abuts against the limit part (32).

3. The saw bow upper swing limiting device of the sawing machine according to claim 1, characterized in that, The bracket (1) is integrally formed from high-strength alloy material. The bracket (1) has two horizontal mounting holes and is fixed to the base by bolts.

4. The saw bow upper swing limiting device of the sawing machine according to claim 1, characterized in that, The rotating part (31) has an upper longitudinal hole, in which the rotating shaft (2) is installed. The top of the rotating shaft (2) has a screw hole. Above the longitudinal shaft is a torsion spring (4). Above the torsion spring (4) is an upper pressure cover (6). The upper pressure cover (6) has a hole in the middle. After the bolt passes through the hole of the upper pressure cover (6), it passes through the torsion spring (4) and is fixed in the screw hole at the top of the rotating shaft (2). The rotating part (31) has a groove on its side to embed one end of the torsion spring (4). The other end of the torsion spring (4) passes through the hole of the pressure cover (6).

5. The saw bow upper swing limiting device of the sawing machine according to claim 1, characterized in that, The lower part of the rotating shaft (2) is a threaded structure, the upper longitudinal hole of the bracket (1) is a through hole, and the threaded structure of the lower part of the rotating shaft (2) passes through the through hole and is fixed with a nut.

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