CN207621285U - A kind of incomplete gear mechanism of achievable intermittently-driving and point transmission - Google Patents

Abstract

The utility model discloses the incomplete gear mechanisms of a kind of achievable intermittently-driving and point transmission, the multiple partial gears driven including the anodontia roller gear of part-circular periphery and by the roller gear, the groove coordinated with the toothless part of roller gear is offered on partial gear, the bar for stirring pusher dog is provided on roller gear, the pusher dog is mutually fixed with partial gear.The utility model can be by a movement point transmission at multiple componental movements, intermittent movement may be implemented in single componental movement, it is not interfere with each other between each componental movement, by the way that multiple partial gears are arranged, can successively transmission be engaged with roller gear respectively, multiple componental movement transmissions may be implemented, pass through the roller gear that setting unit is anodontia, it is engaged with partial gear and stops being driven two kinds of mated conditions, the intermittent movement of single componental movement may be implemented, by the way that pusher dog is arranged, the meshing state for the roller gear for keeping partial gear anodontia with part switches more smooth and accurate.

Description

An Incomplete Gear Mechanism Capable of Realizing Intermittent Transmission and Split Transmission

technical field

The utility model belongs to the technical field of gear transmission, in particular to an incomplete gear mechanism capable of realizing intermittent transmission and sub-transmission.

Background technique

my country is a big country in the production and consumption of fruits and vegetables. According to a report on deciduous fruit trees published by the United States Department of Agriculture, China’s apples and pears are outstanding, with both output and export volume showing an upward trend. From 2015 to 2016 During the production season, the global apple production reached 76.9 million tons. Among them, the growth of China's production was particularly obvious, an increase of about 2.1 million tons compared with the same period last year, reaching 43 million tons. This benefited from China's good climate and fertile soil suitable for crop growth. The above data show that apple is one of the main varieties of fruit production in my country.

Although my country is a big country in the production and consumption of fruits and vegetables, compared with developed countries, my country started relatively late in the field of auxiliary picking machinery. A focus research object. The picking and harvesting of fruits and vegetables is a particularly time-consuming and labor-intensive process in the fruit and vegetable production line. Especially for the large-scale planted apple picking in the northern region, the entire picking season is short and labor-intensive. Moreover, the apples grow at different heights, and the fruit skin is easily damaged due to pressure, friction and collision, which brings great difficulties to the picking work. Great inconvenience. The vast majority of existing picking methods are artificial picking, which is inefficient.

The function of the gripper is to replace the human hand to pick the picking object. According to the analysis of the picking action of the human hand, at least two actions are required to complete a picking. First, clamp the picking object, and then clamp the picking object to rotate, so that The picking object is separated from the tree to complete the picking action. The gripper needs to complete two different actions, and these two actions are carried out alternately. Generally, two driving motors can be used to perform different movements respectively, but this movement mode The accuracy is often poor, and the two motor drives are prone to mutual interference, resulting in failures, frequent failures in long-term use, and easy to cause motion failure.

Utility model content

The technical problem to be solved by the utility model is to provide an incomplete gear mechanism that can realize intermittent transmission and sub-transmission in view of the above-mentioned deficiencies in the prior art. The incomplete gear mechanism can divide one movement into multiple sub-movements , and multiple sub-movements move in a certain sequence, a single sub-movement can realize intermittent motion, and each sub-movement does not interfere with each other. By setting a plurality of incomplete gears, they can be meshed with the cylindrical gears successively for transmission, which can To realize the transmission of multiple sub-movements, by setting a part of the toothless cylindrical gear, it can cooperate with the incomplete gear in two states of meshing and stop transmission, and can realize the intermittent movement of a single sub-motion. By setting the claw, the incomplete The meshing state switching between the gear and the partially toothless cylindrical gear is smoother and more accurate.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is: an incomplete gear mechanism capable of realizing intermittent transmission and sub-transmission, which is characterized in that it includes a cylindrical gear with no teeth on a part of the circumference and a gear driven by the cylindrical gear. Incomplete gears, the number of the incomplete gears is more than two, the incomplete gears are provided with grooves that match the toothless parts of the cylindrical gears, the incomplete gears are fixed with claws, and the cylindrical gears A stop lever for moving the claw is provided.

The aforementioned incomplete gear mechanism that can realize intermittent transmission and sub-transmission is characterized in that: the number of the incomplete gears is two, and the two incomplete gears are the first incomplete gear and the second incomplete gear. Gears, the first incomplete gear and the second incomplete gear are arranged symmetrically on both sides of the spur gear.

The above-mentioned incomplete gear mechanism capable of realizing intermittent transmission and sub-transmission is characterized in that: chamfers are provided at the positions where the toothless part and the toothed part of the cylindrical gear are connected.

The above-mentioned incomplete gear mechanism capable of realizing intermittent transmission and sub-transmission is characterized in that the claw is coaxial with the incomplete gear and rotates synchronously.

The aforementioned incomplete gear mechanism capable of realizing intermittent transmission and sub-transmission is characterized in that the gear shaft installation holes on the first incomplete gear, the second incomplete gear and the cylindrical gear are all semicircular.

Compared with the prior art, the utility model has the following advantages:

1. The utility model is provided with a plurality of incomplete gears, which can respectively carry out meshing transmission with the cylindrical gears successively, and can realize multiple sub-motion transmissions.

2. The utility model can have two matching states of meshing and stopping transmission with the incomplete gear by setting a part of the toothless cylindrical gear, and can realize the intermittent motion of a single sub-motion.

3. The utility model makes the switching of the meshing state of the incomplete gear and the partially toothless cylindrical gear more smooth and accurate by setting the claw.

To sum up, the utility model can transfer one motion into multiple motions, and the multiple motions move in a certain order, and a single motion can realize intermittent motion without interfering with each other. By setting A plurality of incomplete gears can be meshed with the cylindrical gear successively for transmission, and can realize multiple sub-motion transmissions. By setting a part of the cylindrical gear without teeth, it can cooperate with the incomplete gear in two ways: meshing and stop transmission The state can realize the intermittent movement of a single sub-motion. By setting the claw, the meshing state switching between the incomplete gear and the partly toothless cylindrical gear can be switched more smoothly and accurately.

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of a cylindrical gear of the present invention.

Fig. 3 is a structural schematic diagram of the incomplete gear of the present invention.

Explanation of reference signs:

1—cylindrical gear; 2-1—the first incomplete gear; 2-2—the second incomplete gear;

3—stop rod; 4—pull claw; 5—chamfering;

6—groove.

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, the utility model comprises a cylindrical gear 1 without teeth on a part of the circumference and an incomplete gear driven by the cylindrical gear 1, and the number of the incomplete gears is more than two, so The incomplete gear is provided with a groove 6 matching with the toothless part of the cylindrical gear 1 , the incomplete gear is fixed with a finger 4 , and the cylindrical gear 1 is provided with a blocking rod 3 for moving the finger 4 .

The incomplete gear and the cylindrical gear 1 have two cooperation states of meshing and stop transmission, and can realize a single sub-motion intermittent movement; the cylindrical gear 1 can successively mesh with the incomplete gears around the cylindrical gear Transmission can realize multiple sub-motion transmissions; the incomplete gear mechanism can realize intermittent traditional and sub-transmissions. If N sub-movements are required, where N≥2, N incomplete gears are required, and N incomplete gears are required. Gears are distributed on the circumference of the cylindrical gear 1, and the incomplete gear is a cylindrical gear with a groove 6, which can cooperate with the toothless part of the cylindrical gear 1. When the cylindrical gear When the toothless part of spur gear 1 fits with the groove 6 of the incomplete gear, the spur gear 1 and the incomplete gear do not transmit. When the toothed part of the spur gear 1 meshes with the incomplete gear, the incomplete gear needs to be The complete gear rotates at a certain angle. Since the incomplete gear is a driven wheel, it cannot rotate independently. Therefore, a claw 4 is fixed on the incomplete gear to switch the meshing state of the incomplete gear and the partially toothless cylindrical gear. To be smoother and more accurate, a stop lever 3 is fixed on the spur gear 1, and when the spur gear 1 rotates from the toothless part to the toothed part, the stop lever 3 will move the claw 4 to the correct position to move the non-toothed part to the correct position. The complete gear meshes with the toothed part of the spur gear 1 for easy transmission.

It should be noted that when the incomplete gear meshes with the cylindrical gear 1, it will drive the incomplete gear to start moving until the toothed part of the cylindrical gear 1 meshes with the incomplete gear. Here The number of turns of the incomplete gear is related to the ratio between its own number of teeth and the number of teeth of the toothed part of the cylindrical gear 1, and the number of teeth of the incomplete gear is higher than the number of teeth of the toothed part of the cylindrical gear 1. The larger the number of turns of the incomplete gear during one sub-movement, the less it will be, and the number of turns of the incomplete gear can be designed and changed according to specific actual needs. If the toothed part of the cylindrical gear 1 occupies the entire circumference If the ratio is large, it will appear that one sub-movement has not stopped, and another sub-movement has started, which mainly depends on the distribution position of the incomplete gear around the cylindrical gear 1 and the toothed part of the cylindrical gear 1. The proportion of the entire circumference, the larger the proportion, the more the number of rotations of the single sub-motion of the incomplete gear, and vice versa, the closer the distance between two adjacent incomplete gears, the shorter the interval between the two sub-movements.

In this embodiment, the number of the incomplete gears is two, and the two incomplete gears include a first incomplete gear 2-1 and a second incomplete gear 2-2, and the first incomplete gear 2 -1 and the second incomplete gear 2-2 are symmetrically arranged on both sides of the cylindrical gear 1.

This embodiment only needs two sub-movements, so the number of incomplete gears is two, including the first incomplete gear 2-1 and the second incomplete gear 2-2. When in use, along with the spur gear 1 rotation, when the first incomplete gear 2-1 meshes with the cylindrical gear 1, the clamping action is transmitted to the clamping device through the transmission mechanism of the clamping device, and the second incomplete gear 2-2 is in the Stop the transmission state, when the second incomplete gear 2-2 meshes with the cylindrical gear 1, the clamping device is rotated through the rotating transmission mechanism, and the picking object is unscrewed, and the first incomplete gear 2 -1 is in the stop transmission state, realizing the split transmission of the cylindrical gear 1 to the first incomplete gear 2-1 and the second incomplete gear 2-2, and respectively realizing the cylindrical gear 1 to the first incomplete gear 2-1 And spur gear 1 to the intermittent transmission of the second incomplete gear 2-2.

The first incomplete gear 2-1 and the second incomplete gear 2-2 are arranged symmetrically on both sides of the spur gear 1, which means that the first incomplete gear 2-1 and the second incomplete gear 2-2 are uniform Distributed on the circumference of the cylindrical gear 1, the movement of the first incomplete gear 2-1 and the second incomplete gear 2-2 depends on: the ratio of the number of teeth of itself to the number of teeth of the cylindrical gear 1 and the ratio of the number of teeth of the cylindrical gear 1 The proportion of the toothed part, the ratio of the number of teeth and the number of teeth of the cylindrical gear 1 determines the number of rotations of the incomplete gear. This is generally determined according to the actual transmission requirements. Generally, during the transmission process, the transmission ratio of each link can be adjusted. Reach the desired transmission ratio, so the number of single transmission turns of the incomplete gear is generally not the key point. In this embodiment, the first incomplete gear 2-1 and the second incomplete gear 2-2 are evenly distributed in the On the circumference of the cylindrical gear 1, the ratio of the toothed part of the cylindrical gear 1 determines the motion state of the two. When the ratio is less than 50%, the toothed part of the cylindrical gear 1 is separated from the first incomplete The gear 2-1 then meshes with the second incomplete gear 2-2, the smaller the ratio, the longer the interval; when the ratio is equal to 50%, the toothed part of the cylindrical gear 1 leaves the first incomplete The complete gear 2-1 meshes with the second incomplete gear 2-2 to start transmission, and when it leaves the second incomplete gear 2-2, it starts meshing with the first incomplete gear 2-1 again transmission; when the ratio is greater than 50%, the toothed part of the cylindrical gear 1 starts to mesh with the second incomplete gear 2-2 before leaving the first incomplete gear 2-1, and the first incomplete gear The complete gear 2-1 and the second incomplete gear 2-2 move together for a period of time, and the time of the joint movement depends on the proportion. The larger the proportion, the longer the joint movement time, and vice versa.

In this embodiment, a chamfer 5 is provided at the position where the toothless part and the toothed part are connected on the circumference of the cylindrical gear 1 .

The function of setting the chamfer 5 is: it can avoid motion interference between the incomplete gear and the cylindrical gear 1 when switching the mating state, and can make the motion switching smoother.

In this embodiment, the claw 4 is coaxial with the incomplete gear and rotates synchronously.

The coaxial and synchronous rotation of the claw 4 and the incomplete gear can avoid fixing the claw 4 on the incomplete gear, increase the weight of the incomplete gear, and change the center of gravity of the incomplete gear. All the gears are coaxial and rotate synchronously, can be installed and disassembled, can be reused, and have good economy.

In this embodiment, the gear shaft installation holes of the first incomplete gear 2 - 1 , the second incomplete gear 2 - 2 and the cylindrical gear 1 are all semicircular.

The gear shaft installation holes of the first incomplete gear 2-1, the second incomplete gear 2-2 and the cylindrical gear 1 are semicircular, which can avoid connecting with the rotating shaft with key pins, and have a simple structure and save materials. It should be noted that the gear shaft mounting hole of the gear is a through hole located at the center of the gear for mounting the gear shaft.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present utility model still belong to Within the scope of protection of the technical solution of the utility model.

Claims (5)

1. A kind of incomplete gear mechanism that can realize intermittent transmission and sub-transmission, it is characterized in that: comprise part circle toothless cylindrical gear (1) and the incomplete gear driven by described cylindrical gear (1), described incomplete The number of complete gears is more than two, and the incomplete gear is provided with a groove (6) that matches the toothless part of the cylindrical gear (1), and the incomplete gear is fixed with a finger (4). The gear (1) is provided with a blocking rod (3) for moving the claw (4). 2. A kind of incomplete gear mechanism capable of realizing intermittent transmission and sub-transmission according to claim 1, characterized in that: the number of said incomplete gears is two, and the two incomplete gears are the first incomplete gears. A complete gear (2-1) and a second incomplete gear (2-2), the first incomplete gear (2-1) and the second incomplete gear (2-2) are symmetrically arranged on the spur gear (1) on both sides. 3. According to claim 1, a kind of incomplete gear mechanism capable of realizing intermittent transmission and sub-transmission is characterized in that: the position where the toothless part and the toothed part of the cylindrical gear (1) are connected is provided with Chamfer (5). 4. An incomplete gear mechanism capable of intermittent transmission and sub-transmission according to claim 1, characterized in that: the claw (4) is coaxial with the incomplete gear and rotates synchronously. 5. According to claim 2, a kind of incomplete gear mechanism capable of realizing intermittent transmission and split transmission is characterized in that: the first incomplete gear (2-1), the second incomplete gear (2-2 ) and the gear shaft mounting holes on the cylindrical gear (1) are semicircular.