Chain belt driving structure applied to depth adjusting device of chain belt nail gun

Abstract

The invention discloses a chain belt driving structure applied to a depth adjusting device of a chain belt nail gun. The chain belt driving structure comprises a machine shell, a machine head, a one-way braking mechanism and a linkage mechanism. The machine shell is provided with a moving space, the machine head is movably inserted into the moving space and provided with a chain belt inserting groove and an installation cavity, the one-way braking mechanism is arranged in the installation cavity and partially extends into the chain belt inserting groove, and the linkage mechanism is connected with the one-way braking mechanism and the machine shell. During working, the machine head is away from the machine shell in the inserting direction for nailing resetting, the linkage mechanism synchronously drives the one-way braking mechanism to act, the chain belt is driven to stably feed through one-way braking cooperation of the rotating shaft, the ratchet wheel and the pawl, and friction is reduced through the rolling wheels on the connecting rod. According to the structure, synchronous linkage of nailing reset and chain belt feeding is achieved, operation is convenient and fast, feeding is free of clamping stagnation, positioning is accurate, the structure is suitable for chain belts of different specifications, the operation efficiency and nailing precision are remarkably improved, the service life of tools is prolonged, and the structure is suitable for various chain belt nail gun depth adjusting devices.

Description

Technical Field

[0001] This invention relates to the field of chain nail gun technology, and more specifically to a chain drive structure used in a chain nail gun depth adjustment device. Background Technology

[0002] Chain nail guns are commonly used fastening tools in construction, decoration, and furniture manufacturing. They use a chain to carry and continuously feed nails, and with a depth adjustment device, the nailing depth can be adjusted according to work requirements. Currently, the chain drive mechanism in the depth adjustment device of existing chain nail guns is mostly independently designed or has an unreasonable linkage structure: on the one hand, adjusting the nailing depth requires operating the chain feed action separately, which is cumbersome and inefficient; on the other hand, some linkage structures have problems such as large transmission gaps and unstable force, resulting in the chain feed speed and depth adjustment action being out of sync, which can easily lead to chain jamming, nail feed deviation, and consequently, large nailing depth deviations and weak nail fastening, seriously affecting work quality and tool life.

[0003] To address the aforementioned technical deficiencies, it is urgent to design a chain drive structure that can achieve synchronous linkage between depth adjustment and chain drive, and provide stable feed. Summary of the Invention

[0004] The purpose of this invention is to provide a chain drive structure for use in a chain nail gun depth adjustment device, so as to solve the problems of poor linkage between depth adjustment and chain drive and unstable feed in the prior art.

[0005] To achieve the above and other related objectives, the technical solution provided by this invention is: a chain drive structure applied in a chain nail gun depth adjustment device, comprising: The housing has an opening that extends inward to form an active space; The machine head is movably inserted into the movable space and at least partially extends out of the housing through the opening. The portion of the machine head extending out of the housing is provided with a chain slot, and the machine head is provided with an installation cavity communicating with the slot. A one-way braking mechanism, wherein the one-way braking mechanism is disposed in the mounting cavity and extends at least partially into the chain slot for driving the chain; A linkage mechanism is provided in the mounting cavity and connected to the one-way braking mechanism. The linkage mechanism extends at least partially out of the machine head and is connected to the machine housing. The linkage mechanism is configured to drive the one-way braking mechanism to move as the machine head moves away from the machine housing in the insertion direction, thereby driving the chain belt to move.

[0006] The preferred technical solution is as follows: the one-way braking mechanism includes a rotating shaft, a ratchet, a pawl, a spring, a torsion spring, and a knob. The rotating shaft is rotatably mounted in the mounting cavity and one end extends out of the machine head. A first rotating disk and a second rotating disk are formed on the rotating shaft. The ratchet is rotatably mounted on the rotating shaft. A ring of wedges arranged at equal angles is provided on the side of the first rotating disk near the ratchet. A ring of wedges arranged at equal angles is provided on the side of the ratchet near the first rotating disk. The spring is sleeved on the other end of the rotating shaft. One end abuts against the mounting cavity, and the other end abuts against the turntable. The first wedge and the second wedge form a one-way braking structure. The pawl has a shaft, which is rotatably mounted in the mounting cavity and extends out of the machine head. The torsion spring is sleeved on the shaft, with one end abutting against the pawl and the other end abutting against the mounting cavity. The knob is fixed to the part of the shaft that extends out of the machine head and is used to control the rotation angle of the pawl. The part of the rotating shaft that extends out of the machine head is correspondingly set with the knob.

[0007] A preferred technical solution is that the outer periphery of the ratchet has multiple sets of teeth arranged at equal angles, and at least some of the teeth are located in the chain slot.

[0008] The preferred technical solution is as follows: the linkage mechanism includes the second turntable and the connecting rod, the machine head is provided with an arc-shaped clearance hole communicating with the mounting cavity, and the machine housing is provided with an irregularly shaped guide hole; a groove is formed on the outer periphery of the second turntable, the connecting rod is rotated in the mounting cavity, one end of the connecting rod is inserted into the groove, and the other end of the connecting rod passes through the arc-shaped clearance hole and is inserted into the irregularly shaped guide hole.

[0009] A preferred technical solution is that the portion of the connecting rod inserted into the arc-shaped clearance hole and the irregularly shaped guide hole is fitted with a roller.

[0010] Due to the application of the above technical solution, the beneficial effects of this invention are as follows: Synchronous linkage and convenient operation: The nailing reset action is directly linked to the chain drive through the linkage mechanism. There is no need to operate the chain feed separately. The chain feed after nailing can be completed in one action, which simplifies the operation steps, improves the work efficiency, and solves the problem of independent operation or poor linkage between the two in the existing technology.

[0011] Stable feed and improved accuracy: The one-way braking mechanism ensures zero backlash in the transmission through the tight fit between wedge one and wedge two and the spring preload; the one-way braking cooperation between the pawl and the ratchet can prevent the chain from slipping in the opposite direction. Combined with the arc-shaped tooth surface design, the chain feed is evenly stressed, effectively avoiding jamming and deviation, and significantly improving the accuracy of nailing depth and the reliability of nail fastening.

[0012] Highly versatile and widely adaptable: The pawl angle can be adjusted by the knob to achieve one-way braking or unlocking of one-way braking function. It can also push the rotating shaft along the axis to realize the opening and closing of the one-way braking structure.

[0013] Compact structure and long service life: The roller design on the connecting rod reduces frictional loss between moving parts. The compact layout of each component and the short transmission path reduce the failure rate and extend the service life of the overall structure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the depth adjustment device involved in this invention from one viewpoint.

[0015] Figure 2 This is a schematic diagram of the one-way braking mechanism and linkage mechanism involved in this invention from one perspective.

[0016] Figure 3 This is a schematic diagram of the unidirectional braking mechanism and linkage mechanism involved in this invention from another perspective.

[0017] Figure 4 This is a schematic diagram of the overall structure of the depth adjustment device involved in this invention from another perspective.

[0018] Figure 5 This is a schematic diagram of the head structure involved in the present invention. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0020] Please see Figures 1-5 It should be noted that in the description of this invention, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0022] like Figures 1 to 5 As shown, according to an overall technical concept of the present invention, a chain drive structure for use in a chain nail gun depth adjustment device is provided, including a housing 1, a head 2, a one-way braking mechanism, and a linkage mechanism.

[0023] An opening 11 is provided on the housing 1, and the opening 11 extends inward to form an active space 12. The machine head 2 is movably inserted into the active space 12, and the front end of the machine head 2 extends out of the housing 1 through the opening 11. The extended part of the machine head 2 is provided with a chain belt slot 21 for accommodating the chain belt. The machine head 2 has an installation cavity 22 that communicates with the chain belt slot 21. The installation cavity 22 provides installation space for the one-way braking mechanism and the linkage mechanism.

[0024] The one-way braking mechanism includes a rotating shaft 31, a ratchet 32, a pawl 33, a spring 34, a torsion spring 35, and a knob 36. The rotating shaft 31 is rotatably mounted in the mounting cavity 22 via bearings and can move axially. Its right end extends out of the machine head 2. The rotating shaft 31 has integrally formed a follower turntable 311 and a turntable 312. The ratchet 32 ​​is sleeved on the rotating shaft 31 and can rotate relative to the rotating shaft 31. The turntable 311 has a ring of wedges 311a arranged at equal angles on the side near the ratchet 32. The ratchet 32 ​​has a ring of wedges 321 arranged at equal angles on the side near the turntable 311. The inclined surfaces of the wedges 311a and 321 fit together to form a one-way braking structure. The spring 34 is sleeved on the left end of the rotating shaft 31. One end of the spring 34 abuts against the left side wall of the mounting cavity 22, and the other end abuts against the turntable 312, providing a continuous preload force for the turntable 311 to ensure that the wedges 311a and 321 fit tightly together.

[0025] A shaft 331 is provided in the middle of the pawl 33. The shaft 331 is rotatably mounted in the mounting cavity 22, and the right end of the shaft 331 extends out of the machine head 2. A torsion spring 35 is sleeved on the shaft 331. One end of the torsion spring 35 abuts against the pawl 33, and the other end abuts against the inner wall of the mounting cavity 22, so that the front end of the pawl 33 always abuts against the tooth groove of the ratchet 32. A knob 36 is fixedly installed on the extended end of the shaft 331. Rotating the knob 36 can drive the shaft 331 to rotate, thereby adjusting the angle of the pawl 33 to control whether the pawl 33 abuts against or disengages from the tooth groove of the ratchet 32. Meanwhile, the right end of the rotating shaft 31 extends out of the machine head 2 and is correspondingly set with the knob 36. In the unlocked state, the knob 36 controls the pawl 33 to disengage from the tooth groove of the ratchet 32, and at the same time presses against the right end of the rotating shaft 31 to overcome the elastic force of the spring 34, causing the first wedge 311a and the second wedge 321 to separate. In the locked state, the knob 36 controls the pawl 33 to press against the tooth groove of the ratchet 32, and at the same time releases the right end of the rotating shaft 31. The first wedge 311a and the second wedge 321 are tightly fitted together under the force of the spring 34.

[0026] The linkage mechanism includes a turntable 312 and a connecting rod 41. An arc-shaped clearance hole 23 is opened on the side wall of the machine head 2, which connects to the mounting cavity 22. An irregular guide hole 13 is provided on the inner wall of the machine housing 1. An arc-shaped groove 312a is opened on the outer periphery of the turntable 312. The connecting rod 41 is rotatably mounted in the mounting cavity 22 through a pin. The left end of the connecting rod 41 is inserted into the groove 312a, and the right end of the connecting rod 41 passes through the arc-shaped clearance hole 23 and is inserted into the irregular guide hole 13. A roller 42 is sleeved on the right end of the connecting rod 41. The roller 42 rolls with the arc-shaped clearance hole 23 and the irregular guide hole 13 respectively to reduce friction loss.

[0027] The outer periphery of the ratchet 32 ​​has multiple sets of equally angled teeth 322. The tooth surface of the teeth 322 is arc-shaped. Some of the teeth 322 extend into the chain belt slot 21 and mesh with the chain belt in the chain belt slot 21 to realize the driving feed of the chain belt.

[0028] The chain drive structure of this embodiment realizes the synchronous action of nailing reset and chain drive through the linkage mechanism, which solves the problems of poor linkage and unstable feed in the prior art. It has a compact structure and is easy to operate, and can be widely used in the depth adjustment device of various chain nail guns.

[0029] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A chain drive structure used in a chain nail gun depth adjustment device, characterized in that, include: The housing has an opening that extends inward to form an active space; The machine head is movably inserted into the movable space and at least partially extends out of the housing through the opening. The portion of the machine head extending out of the housing is provided with a chain slot, and the machine head is provided with an installation cavity communicating with the slot. A one-way braking mechanism, wherein the one-way braking mechanism is disposed in the mounting cavity and extends at least partially into the chain slot for driving the chain; A linkage mechanism is provided in the mounting cavity and connected to the one-way braking mechanism. The linkage mechanism extends at least partially out of the machine head and is connected to the machine housing. The linkage mechanism is configured to drive the one-way braking mechanism to move as the machine head moves away from the machine housing in the insertion direction, thereby driving the chain belt to move.

2. The chain drive structure applied in the chain nail gun depth adjustment device according to claim 1, characterized in that: The one-way braking mechanism includes a rotating shaft, a ratchet, a pawl, a spring, a torsion spring, and a knob. The rotating shaft is rotatably mounted in the mounting cavity, with one end extending out of the machine head. A first rotating disk and a second rotating disk are formed on the rotating shaft. The ratchet is rotatably mounted on the rotating shaft. A ring of wedges arranged at equal angles is provided on the side of the first rotating disk near the ratchet. A ring of wedges arranged at equal angles is provided on the side of the ratchet near the first rotating disk. The spring is sleeved on the other end of the rotating shaft, and one end of the spring is connected to the mounting cavity. The first wedge and the second wedge form a one-way braking structure. The pawl has a shaft that is rotatably mounted in the mounting cavity and extends out of the machine head. The torsion spring is sleeved on the shaft, with one end abutting the pawl and the other end abutting the mounting cavity. The knob is fixed to the part of the shaft that extends out of the machine head and is used to control the rotation angle of the pawl. The part of the rotating shaft that extends out of the machine head is correspondingly set with the knob.

3. The chain drive structure applied in the chain nail gun depth adjustment device according to claim 2, characterized in that: The outer periphery of the ratchet has multiple sets of teeth arranged at equal angles, and at least some of the teeth are located in the chain slot.

4. The chain drive structure applied in the chain nail gun depth adjustment device according to claim 2, characterized in that: The linkage mechanism includes the second turntable and the connecting rod. The machine head is provided with an arc-shaped clearance hole that connects to the mounting cavity, and the machine housing is provided with an irregularly shaped guide hole. A groove is formed on the outer periphery of the second turntable. The connecting rod is rotated into the mounting cavity. One end of the connecting rod is inserted into the groove, and the other end of the connecting rod passes through the arc-shaped clearance hole and is inserted into the irregularly shaped guide hole.

5. The chain drive structure applied in the chain nail gun depth adjustment device according to claim 1, characterized in that: Rollers are fitted onto the portion of the connecting rod that is inserted into the arc-shaped clearance hole and the irregularly shaped guide hole.

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