CN203856998U - Reciprocating electronic control unlocking bar mechanism - Google Patents

Abstract

The utility model discloses a reciprocating electronic control unlocking bar mechanism. The reciprocating electronic control unlocking bar mechanism comprises a reciprocating rack doing linear reciprocating motion and a pawl capable of swinging. The tooth end of the pawl is meshed with a one-way ratchet on the reciprocating rack in an attached mode through a spring. An electromagnet attracting the pawl is fixedly arranged above the pawl and used for attracting the pawl and the reciprocating rack to achieve separation and unlocking. The locking edge of the one-way ratchet on the reciprocating rack is tangent with the swinging arc of the tooth end of the pawl. According to the reciprocating electronic control unlocking bar mechanism, the electromagnet controls the pawl to unlock the reciprocating rack, unlocking is convenient, the reliability is high, and remote operation and automatic control can be achieved. The reciprocating electronic control unlocking bar mechanism can be widely applied to mechanisms needing reciprocating in agricultural machinery and can promote automation of the agricultural machinery.

Description

A reciprocating electronically controlled unlocking ratchet mechanism

technical field

The utility model relates to an electronically controlled unlocking ratchet mechanism used in reciprocating motion.

Background technique

In modern agricultural machinery, there are a large number of reciprocating movements to achieve large-scale operations. Usually, in specific applications, the reciprocating motion needs to stop for a period of time at the reciprocating end point of the reciprocating motion to correct or shift. The traditional reciprocating motion is driven by a motor, and the stop is also to use the motor to stop the reciprocating motion to realize the positioning stop of the reciprocating motion. The motor without locking function is easy to rotate under the action of external force, and the positioning of the reciprocating mechanism is unstable, and the cost of using the motor with locking function is relatively high.

Utility model content

Aiming at the technical defects of reciprocating positioning and locking in agricultural machinery, the utility model provides an electronically controlled unlocking ratchet mechanism for reciprocating motion, which can realize electronically controlled unlocking, is stable and reliable, and has low production cost.

The utility model is realized by adopting the following technical solutions: a reciprocating electronically controlled unlocking ratchet mechanism, including a reciprocating rack 6 for reciprocating linear motion and a swingable pawl 5, the tooth end of the pawl 5 passes through a spring 7 It is closely engaged with the one-way ratchet on the reciprocating rack 6, and an electromagnet 4 for absorbing the ratchet 5 is fixed above the ratchet 5 for separating and unlocking the adsorbing ratchet and the reciprocating rack.

Specifically, the locking side 61 of the one-way ratchet on the reciprocating rack 6 is tangent to the swing arc of the tooth end of the pawl 5 .

Further, the electromagnet 4 is fixedly arranged on the fixing frame 3 , and the fixing frame 3 is fixed above the ratchet 5 by fixing screws 2 .

Further, a limit screw 8 is provided under the ratchet 5 for positioning the ratchet to mesh correctly with the one-way ratchet of the reciprocating rack when locking.

In the present invention, the pawl 5 is made of magnetic material, which facilitates the adsorption of the electromagnet to the pawl.

The electronically controlled unlocking ratchet mechanism of the utility model uses an electromagnet to control the ratchet to unlock the reciprocating rack, which is convenient for unlocking, high in reliability, and can realize remote operation and automatic control, and can be widely used in agricultural machinery that requires reciprocating motion. Conducive to promoting the process of agricultural machinery automation.

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a schematic diagram of the electronically controlled unlocking ratchet mechanism involved in the present invention.

Figure 2 is a schematic diagram of the angle between the pawl and the reciprocating rack.

Symbols in the figure: 1-rotating shaft, 2-fixing screw, 3-fixed frame, 4-electromagnet, 5-pawl, 6-reciprocating rack, 7-spring, 8-limit screw, 61-locking edge.

Detailed ways

Example

Referring to Figure 1, a reciprocating electronically controlled unlocking ratchet mechanism includes a reciprocating rack 6 that performs reciprocating linear motion and a swingable pawl 5, and the tooth end of the pawl 5 is connected to the reciprocating rack 6 through a spring 7. The one-way ratchet on the top is closely engaged, and one end of the spring 7 is fixed, and the other end is connected with the middle part of the ratchet 5 . An electromagnet 4 for absorbing the ratchet 5 is fixed above the ratchet 5 for separating and unlocking the adsorbing ratchet and the reciprocating rack. The electromagnet 4 is fixedly arranged on the fixing frame 3 , and the fixing frame 3 is fixed above the ratchet 5 by the fixing screw 2 . A limit screw 8 is provided below the pawl 5 for positioning the ratchet to mesh correctly with the one-way ratchet of the reciprocating rack when locking. The pawl 5 is made of magnetic material, which facilitates the adsorption of the electromagnet to the pawl.

The locking edge 61 of the one-way ratchet on the reciprocating rack 6 is tangent to the swing arc of the tooth end of the pawl 5, as shown in Figure 2, the locking of the reciprocating rack 6 by the pawl 5 The angle between the force F and the locking side 61 of the reciprocating rack ratchet is 90°, that is, the locking force F is perpendicular to the locking side 61, which can ensure reliable locking. The locking edge 61 of the one-way ratchet of the reciprocating rack 6 is tangent to the arc line of the pawl swinging from the locking to the separation and unlocking position. The resistance in the tangential direction of the contact point of the locking edge of the rack is 0, and the electromagnet can easily separate and unlock the ratchet 5 from the one-way ratchet of the reciprocating rack.

Taking the bridge-type tobacco seedling leaf cutter as an example, during the reciprocating movement of the leaf cutter, the reciprocating rack 6 is fixedly connected with the reciprocating mechanism of the leaf cutter, and the reciprocating rack 6 passes through the left end below the fixed frame 3, and the reciprocating rack 6 When the one-way ratchet on 6 moves to the left, the ratchet 5 is pushed counterclockwise, and the reciprocating rack can pass from right to left smoothly. The tooth end of pawl 5 is closely engaged with one-way ratchet on the direction to the right all the time, and locking reciprocating tooth bar 6 moves to the right. When the leaf cutter reaches the end of the seedling pond, it is necessary to stop the reciprocating motion, and then the leaf cutter moves forward to a station for the next reciprocating pruning. In the process of moving the leaf cutter forward, the tooth end of the pawl 5 resists the reciprocating The locking edge 61 of the one-way ratchet on the tooth bar 6 locks the leaf cutter in position to prevent it from moving back laterally during the movement.

When the leaf cutter needs to reciprocate again, when the reciprocating rack 6 needs to withdraw from right to left, the electromagnet 4 is energized, and the magnetic force generated by the electromagnet 4 generates suction to the pawl 5, so that the pawl 5 swings counterclockwise, and the pawl 5 swings counterclockwise. Claw 5 is sucked by electromagnet 4, and ratchet 5 is separated from the unidirectional ratchet of reciprocating rack, and reciprocating rack 6 can move to the right.

The leaf cutter of the bridge-type tobacco seedling leaf trimmer uses the above-mentioned electronically controlled unlocking ratchet mechanism to realize the side-by-side locking of the lateral intermittent reciprocating movement. It can be automatically controlled and remotely electronically controlled to unlock, which is convenient and fast, and can effectively guarantee the leaf cutting of the tobacco seedlings. During the high-efficiency reciprocating motion, the machine keeps sideways intermittently for a predetermined time, so that the leaf cutter can not miss the tobacco seedlings on the edge of the cutting pool, which is beneficial to save manpower and material resources, and realize efficient automatic control.

The above is a preferred embodiment of the present utility model, but those skilled in the art should understand that, without departing from the spirit and scope of the present utility model defined by the appended claims, all modifications made to the utility model in terms of form and details All these changes belong to the protection scope of the present utility model.

Claims (5)

1. An electronically controlled unlocking ratchet mechanism of reciprocating motion, characterized in that: it comprises a reciprocating rack (6) that performs reciprocating linear motion and a swingable ratchet (5), the tooth end of the ratchet (5) The spring (7) is closely engaged with the one-way ratchet on the reciprocating rack (6), and an electromagnet (4) for adsorbing the ratchet (5) is fixed above the pawl (5) for adsorption The pawl and the reciprocating rack realize separation and unlocking. 2. A reciprocating electronically controlled unlocking ratchet mechanism according to claim 1, characterized in that: the locking edge (61) of the one-way ratchet on the reciprocating rack (6) is in contact with the ratchet The swinging arcs of the tooth ends of the pawl (5) are tangent. 3. A reciprocating electronically controlled unlocking ratchet mechanism according to claim 2, characterized in that: the electromagnet (4) is fixedly arranged on the fixing frame (3), and the fixing frame (3) passes through The fixing screw (2) is fixed above the pawl (5). 4. A reciprocating electronically controlled unlocking ratchet mechanism according to claim 3, characterized in that a limit screw (8) is provided under the ratchet (5). 5. A reciprocating electronically controlled unlocking ratchet mechanism according to any one of claims 1-4, characterized in that: the ratchet (5) is made of magnetic material.