Transmission device for economic crop transplanting machine

Abstract

The utility model belongs to economic crops planting equipment technical field especially relates to an economic crops transplanting machine transmission device. Including two ground wheels, two ground wheels are connected on economic crops transplanting machine car body crossbeam through left and right suspension, two ground wheels are fixedly connected with ground wheel axle and jointly drive ground wheel axle rotation, install first sprocket chain mechanism and second sprocket chain mechanism on ground wheel axle, the driving end of first sprocket chain mechanism is connected on ground wheel axle, the driven end is connected with the drive shaft of seedling taking mechanical hand structure, is used for driving seedling taking mechanical hand structure continuous action, the driving end of second sprocket chain mechanism is connected on ground wheel axle, the driven end is connected with the spiral axle arranged in transmission case, cooperates with removal case axle, removal case axle is rotatably connected with support mounting seat, is used for realizing the transverse reciprocating drive of the plug tray bracket installed on support mounting seat. The utility model has good synchronism, and the reversing impact is small, and the alignment accuracy is high.

Description

Technical Field

[0001] This utility model belongs to the technical field of economic crop planting equipment, specifically relating to a transmission device for an economic crop transplanter. Background Technology

[0002] Existing crop transplanters typically employ two power take-off and transmission schemes: First, they use a concentrated power take-off from an engine or motor, driving the seedling picking mechanism and the lateral feeding mechanism separately via multi-stage gears or chain drives. Second, they utilize passive power take-off from the ground wheels, driving the seedling picking mechanism via a single-path chain drive, and then using a branch connecting rod or crank-slider to drive the lateral feeding mechanism. The former scheme is structurally complex, has a long energy path, requires high motor power and wiring, and is difficult to maintain in the field. While the latter scheme can adapt to the forward speed, the power is distributed in series along a single path, resulting in large transmission gaps and phase accumulation errors, easily causing asynchrony between the "grabbing rhythm—lateral movement rhythm—ground speed." Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the above-mentioned background technology and provide a transmission device for an economic crop transplanter.

[0004] The technical solution adopted by this utility model is as follows: a transmission device for an economic crop transplanter, comprising two ground wheels. The two ground wheels are connected to the crossbeam of the economic crop transplanter body via left and right suspensions. The two ground wheels are fixedly connected to the ground wheel axle and jointly drive the ground wheel axle to rotate. A first sprocket and chain mechanism and a second sprocket and chain mechanism are installed on the ground wheel axle. The driving end of the first sprocket and chain mechanism is connected to the ground wheel axle, and the driven end is connected to the drive shaft of the seedling-picking manipulator structure, for driving the seedling-picking manipulator structure to move continuously. The driving end of the second sprocket and chain mechanism is connected to the ground wheel axle, and the driven end is connected to the drive shaft of the seedling-picking manipulator structure to drive the seedling-picking manipulator structure to move continuously. The end is connected to a spiral shaft located inside the transmission box. The outer circumference of the spiral shaft forms a non-self-locking bidirectional spiral groove for reciprocating drive. The transmission box contains a driven slider assembly that meshes with the spiral groove. The transfer shaft is connected to the driven slider assembly via a connector and moves laterally reciprocating linearly with it. Both ends of the transfer shaft pass through the transmission box and extend to both sides of the bracket mounting seat located above the transmission box, and are rotatably connected to and axially limited by the bracket mounting seat. This is used to realize the lateral reciprocating drive of the seedling tray mounted on the bracket mounting seat. The seedling tray is used to carry and transport seedlings of economic crops.

[0005] Preferably, the two ends of the spiral shaft are rotatably connected to the left and right side walls of the transmission box via bearings and are axially limited.

[0006] Preferably, the drive shaft is housed in the drive shaft housing and rotatably supported by bearings, with both ends of the drive shaft extending out of the drive shaft housing and connecting to the left and right seedling-picking robotic arm structures.

[0007] Preferably, the drive shaft housing is fixed to the transmission housing, and the transmission housing is fixed to the crossbeam of the economic crop transplanter.

[0008] Preferably, the second sprocket chain mechanism is a multi-stage chain drive, including a first driving sprocket coaxial with the ground wheel axle, a final driven sprocket coaxial with the helical shaft, and at least one intermediate sprocket axle located therebetween.

[0009] Preferably, the driven slider assembly includes a crescent pin embedded in the spiral groove and a push block fixedly connected thereto, for converting the rotational motion of the spiral shaft into a reciprocating linear motion in the transverse direction, and the shifting shaft is connected to the push block through a connector and performs a reciprocating linear motion in the transverse direction with it.

[0010] Preferably, the lead angle of the non-self-locking bidirectional spiral groove is greater than or equal to the friction angle of the mating pair.

[0011] Preferably, the non-self-locking bidirectional spiral groove is a double-headed equidistant symmetrical spiral groove, with the two spiral grooves arranged symmetrically on the outer circumference of the spiral shaft.

[0012] The beneficial effects of this utility model are as follows: This utility model adopts a two-way power distribution scheme with synchronous power taking from the ground wheel. One way directly drives the drive shaft of the seedling taking mechanism to achieve continuous and equal-beat action, while the other way uses a screw transmission and slider conversion mechanism set in the transmission box to smoothly convert the rotation into lateral reciprocating linear motion. This allows the seedling taking and lateral seedling delivery to achieve mechanical synchronization with the travel speed as a unified benchmark, avoiding the control complexity and ground speed mismatch problems caused by centralized motor power taking.

[0013] This invention employs a non-self-locking bidirectional spiral structure and a symmetrical groove arrangement, ensuring consistent left and right strokes, smooth reversal, and low return resistance. It can operate stably for extended periods under high-frequency field conditions, significantly reducing the risk of malfunctions caused by jamming and impact. Combined with the rotatable and axially limited connection between the transfer box drive and the mounting base, it provides clear lateral guidance and high positioning repeatability, improving the accuracy of seedling transfer and hole alignment.

[0014] This invention has the combined advantages of good synchronization, small reversal impact, high alignment accuracy, wide applicability, high reliability and low maintenance cost. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the fit between the spiral shaft and the box-moving shaft of this utility model; Figure 2 This is a schematic diagram of the upper part of the structure of this utility model; Figure 3 This is a schematic diagram of the overall structure of this utility model.

[0016] In the diagram, 101-ground wheel, 102-ground wheel axle, 103-first sprocket and chain mechanism, 104-second sprocket and chain mechanism, 105-transfer box axle, 106-transmission box, 107-spiral shaft (107a-non-self-locking bidirectional spiral groove), 108-connector, 109-crescent pin (109a-push block), 201-seedling picking robot structure, 202-drive shaft, 203-drive shaft housing, 301-bracket mounting seat, 302-planter tray bracket, 401-crossbeam of the economic crop transplanter body. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] like Figure 3 As shown, this utility model discloses a transmission device for an economic crop transplanter, comprising two ground wheels 101. The two ground wheels 101 are connected to the crossbeam 401 of the economic crop transplanter body via left and right suspensions. The two ground wheels 101 are fixedly connected to a ground wheel axle 102 and jointly drive the ground wheel axle 102 to rotate. A first sprocket and chain mechanism 103 and a second sprocket and chain mechanism 104 are mounted on the ground wheel axle 102. The driving end of the first sprocket and chain mechanism 103 is connected to the ground wheel axle 102, and the driven end is connected to the drive shaft 202 of a seedling-picking manipulator structure 201, used to drive the seedling-picking manipulator structure 201 to move continuously. The driving end of the second sprocket and chain mechanism 104 is connected to the ground wheel axle 102, and the driven end is connected to a spiral shaft 107 disposed in a transmission box 106. Figure 1 As shown, the outer circumference of the helical shaft 107 forms a non-self-locking bidirectional helical groove 107a for reciprocating drive. A driven slider assembly that meshes with the helical groove 107a is arranged inside the transmission housing 106. The transfer shaft 105 is connected to the driven slider assembly via a connector 108 and performs transverse reciprocating linear motion with it, as shown... Figure 2 As shown, the two ends of the transplanting shaft 105 pass through the transmission box 106 and extend to both sides of the bracket mounting base 301 located above the transmission box 106. It is rotatably connected to and axially limited by the bracket mounting base 301, enabling lateral reciprocating drive of the seedling tray holder 302 mounted on the bracket mounting base 301. The seedling tray holder 302 is used to carry and transport seedlings of economic crops. The bracket mounting base 301 is slidably connected to the crossbeam 401 of the economic crop transplanter body via a bracket (not shown in the figure).

[0019] The two ends of the spiral shaft 107 are rotatably connected to the left and right side walls of the transmission box 106 through bearings and are axially limited.

[0020] The drive shaft 202 is housed within the drive shaft housing 203 and is rotatably supported by bearings. Both ends of the drive shaft 202 extend out of the drive shaft housing 203 and are connected to the left and right seedling-picking robotic arm structures 201. The drive shaft housing 203 is fixed to the transmission box 106, which is fixed to the crossbeam 401 of the economic crop transplanter.

[0021] The second sprocket and chain mechanism 104 is a multi-stage chain drive, including a first driving sprocket coaxial with the ground wheel shaft 102, a final driven sprocket coaxial with the helical shaft 107, and at least one intermediate sprocket shaft located therebetween.

[0022] The driven slider assembly includes a crescent pin 109 embedded in the spiral groove 107a and a push block 109a fixedly connected thereto, for converting the rotational motion of the spiral shaft 107 into a reciprocating linear motion in the transverse direction. The transfer shaft 105 is connected to the push block 109a through the connector 108 and moves in a reciprocating linear motion in the transverse direction with it.

[0023] The lead angle of the non-self-locking bidirectional spiral groove 107a is greater than or equal to the friction angle of the mating pair.

[0024] The non-self-locking bidirectional spiral groove 107a is a double-headed equidistant symmetrical spiral groove, with the two spiral grooves arranged symmetrically on the outer circumference of the spiral shaft 107.

[0025] The engineering process of this utility model: S1: The machine moves forward, and the two ground wheels 101 are fixed coaxially with the ground wheel shaft 102. The rolling of the ground wheels 101 drives the ground wheel shaft 102 to rotate synchronously. The first sprocket chain mechanism 103 and the second sprocket chain mechanism 104 on the ground wheel shaft 102 are driven at the same time, forming two transmission paths.

[0026] Path A: Continuous driving of the gripper rhythm during seedling picking S2: The active end of the first sprocket chain mechanism 103 is fixed on the ground wheel axle 102; its driven end drives the drive shaft 202 to rotate. The drive shaft 202 is arranged in the drive shaft housing 203 and supported by bearings. Both ends are connected to the left and right seedling picking robot structures 201 respectively, realizing continuous and equal-rhythm gripping / opening actions. The seedling picking robot structure 201 adapts to the vehicle speed and moves continuously to complete the gripping and transfer preparation of the potted seedlings of economic crops.

[0027] Path B: Lateral seedling delivery driven reciprocating straight line S3: The driving end of the second sprocket and chain mechanism 104 is fixedly connected to the ground wheel shaft 102, and its driven end is connected to the helical shaft 107 in the transmission box 106, so that the helical shaft 107 rotates with the ground wheel shaft 102. The two ends of the helical shaft 107 are rotatably supported and axially limited by bearings on the left and right side walls of the transmission box 106.

[0028] S4: When the helical shaft 107 rotates, the crescent pin 109 is guided along the helical groove 107a, and the push block 109a moves back and forth in the transmission box 106 along the transverse linear guide, thereby converting the rotational motion of the helical shaft 107 into transverse reciprocating linear motion. Since the lead angle is greater than or equal to the friction angle, there is no self-locking between the pairs, which can realize bidirectional smooth drive and low-resistance return.

[0029] S5: The transfer shaft 105 is connected to the push block 109a via the connector 108. It moves laterally and reciprocates linearly with the push block 109a. Both ends of the transfer shaft 105 pass through the transmission box 106 and extend to both sides of the bracket mounting seat 301 above the transmission box 106. It is rotatably connected and axially limited at the bracket mounting seat 301. The seedling tray bracket 302 installed on the bracket mounting seat 301 moves laterally and reciprocates under the drive of the transfer shaft 105, and laterally transfers and aligns the seedlings from the seedling picking robot structure 201 according to the set hole spacing / beat.

[0030] S6: When the crescent pin 109 runs to the end of the spiral groove 107a, it continues to rotate with the spiral shaft 107. The crescent pin 109 returns along the groove line in the opposite direction, and the push block 109a realizes the reverse linear stroke; the transfer shaft 105 and the cavity tray bracket 302 complete one reversal.

[0031] Since both path A and path B are based on the rotational speed of the ground wheel axle 102, the gripping and releasing sequence of the seedling picking robot structure 201 and the lateral movement of the seedling tray bracket 302 are mechanically synchronized; when the vehicle speed changes, the rhythm of the two changes proportionally with the ground speed to maintain coordination.

[0032] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Contents not described in detail in this specification belong to prior art known to those skilled in the art.

Claims

1. A transmission device for a crop transplanter, comprising two ground wheels (101), the two ground wheels (101) being connected to the crossbeam (401) of the crop transplanter body via left and right suspensions, characterized in that: Two ground wheels (101) are fixedly connected to the ground wheel axle (102) and jointly drive the ground wheel axle (102) to rotate. A first sprocket and chain mechanism (103) and a second sprocket and chain mechanism (104) are installed on the ground wheel axle (102). The driving end of the first sprocket and chain mechanism (103) is connected to the ground wheel axle (102), and the driven end is connected to the drive shaft (202) of the seedling-picking robot structure (201) to drive the seedling-picking robot structure (201) to move continuously. The driving end of the second sprocket and chain mechanism (104) is connected to the ground wheel axle (102), and the driven end is connected to the spiral shaft (107) set in the transmission box (106). The outer periphery of the spiral shaft (107) forms The non-self-locking bidirectional spiral groove (107a) for reciprocating drive is provided in the transmission box (106), which is equipped with a driven slider assembly that meshes with the spiral groove (107a). The transfer shaft (105) is connected to the driven slider assembly through the connector (108) and moves laterally and reciprocally. The two ends of the transfer shaft (105) pass through the transmission box (106) and extend to both sides of the bracket mounting seat (301) located above the transmission box (106), and are rotatably connected to the bracket mounting seat (301) and axially limited, so as to realize the lateral reciprocating drive of the seedling tray bracket (302) installed on the bracket mounting seat (301). The seedling tray bracket (302) is used to carry and transport economic crop seedlings.

2. The transmission device for a crop transplanter according to claim 1, characterized in that: The two ends of the spiral shaft (107) are rotatably connected to the left and right side walls of the transmission box (106) through bearings and are axially limited.

3. The transmission device for a crop transplanter according to claim 1, characterized in that: The drive shaft (202) is located inside the drive shaft housing (203) and is rotatably supported by bearings. Both ends of the drive shaft (202) extend out of the drive shaft housing (203) and are connected to the left and right seedling picking robot structures (201).

4. A transmission device for an economic crop transplanter according to claim 1 or 3, characterized in that: The drive shaft housing (203) is fixed to the transmission housing (106), and the transmission housing (106) is fixed to the crossbeam (401) of the economic crop transplanter.

5. The transmission device for a crop transplanter according to claim 1, characterized in that: The second sprocket chain mechanism (104) is a multi-stage chain drive, including a first driving sprocket coaxial with the ground wheel shaft (102), a final driven sprocket coaxial with the helical shaft (107), and at least one intermediate sprocket shaft located therebetween.

6. The transmission device for a crop transplanter according to claim 1, characterized in that: The driven slider assembly includes a crescent pin (109) embedded in the spiral groove (107a) and a push block (109a) fixedly connected thereto, for converting the rotational motion of the spiral shaft (107) into a reciprocating linear motion in the transverse direction. The transfer shaft (105) is connected to the push block (109a) through a connector (108) and moves in a reciprocating linear motion in the transverse direction with it.

7. The transmission device for a crop transplanter according to claim 1, characterized in that: The lead angle of the non-self-locking bidirectional spiral groove (107a) is greater than or equal to the friction angle of the mating pair.

8. The transmission device for a crop transplanter according to claim 1, characterized in that: The non-self-locking bidirectional spiral groove (107a) is a double-headed equidistant symmetrical spiral groove, with the two spiral grooves arranged symmetrically on the outer periphery of the spiral shaft (107).

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