Agricultural fertilization device and operation method

Abstract

An agricultural fertilizing device comprises a rack, two sides of the rack are slidably connected with bearing seats, the bearing seat on one side is connected with a power device, a charging barrel is connected in the two bearing seats, one side of the charging barrel is connected with a hopper, a spiral shaft is rotatably connected in the charging barrel, the cylindrical surface of the charging barrel is connected with a set of opening and closing devices, the outer sides of the opening and closing devices are connected with moving rings, and the upper portions of the moving rings are connected with lead screws. The lead screw is connected with the bearing seats on the two sides, one side of the lead screw is connected with the reversing device, and the reversing device is connected with the rack.

Description

Technical Field

[0001] The present invention relates to the field of agricultural machinery, and in particular to an agricultural fertilization device and an operating method thereof. Background Art

[0002] Agricultural greenhouses have many benefits in agricultural production and are one of the important facilities for improving agricultural production efficiency. Now, plug tray planting is widely used in greenhouse agricultural planting. When fertilizing and sowing crops in plug trays, the fertilizer needs to be mixed in advance and then applied to each plug tray. The fertilization method is generally to fill the plug trays one by one and then place the crop plug trays in the greenhouse. This fertilization is not only inefficient but also consumes a lot of manpower, which increases the cost of agricultural planting. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides an agricultural fertilizing device and an operating method which can automatically stir fertilizer, control the amount of fertilizer, and automatically apply fertilizer to a crop plug tray.

[0004] The purpose of the present invention is to be achieved through the following technical solutions: An agricultural fertilizing device comprises a frame, wherein bearing seats are slidably connected to both sides of the frame, a bearing seat on one side is connected to a power device, a barrel is connected between the two bearing seats, one side of the barrel is connected to a hopper, a spiral shaft is rotatably connected in the barrel, a group of opening and closing devices are connected to the cylindrical surface of the barrel, a moving ring is connected to the outside of the opening and closing device, a screw is connected to the upper part of the moving ring, the screw is connected to the bearing seats on both sides, one side of the screw is connected to a reversing device, and the reversing device is connected to the frame.

[0005] A slide is provided on each of the left and right sides of the frame, and each slide is slidably connected to the bearing seat slider at the lower part of the bearing seat. The two sides of the barrel are fixed in the bearing seats on both sides, and the right side of the barrel is fixedly connected to the hopper. The barrel is a tubular structure with a closed left side. A spiral shaft hole is provided on the closed surface of the left side of the barrel. The spiral shaft hole is rotatably connected to the spiral shaft intermediate shaft. The left side of the spiral shaft intermediate shaft is fixedly connected to the motor output shaft, and the motor is fixed on the left side of the barrel.

[0006] The power device includes a power seat, the side of the power seat is rotatably connected to two pulleys, one of the pulley intermediate shafts is connected to the motor, the outer sides of the two pulleys are rotatably connected to the belt, the outer side of the belt is fixedly connected to the follower block, the follower block shaft on one side of the follower block is slidably connected to the sliding frame waist groove on the side of the sliding frame, the sliding frame is slidably connected to the two guide rods of the power seat, and the connecting rod on the side of the left bearing seat is rotatably connected to the sliding frame hole on the side of the sliding frame.

[0007] The lower part of the barrel is provided with a barrel bottom groove for the fertilizer to flow out, a partition is provided in the middle of the barrel bottom groove, a group of annular grooves are evenly distributed along the axial direction on the cylindrical surface of the barrel, each annular groove is provided with an opening and closing device, the opening and closing device comprises a No. 1 semi-ring and a No. 2 semi-ring, the inner diameters of the No. 1 semi-ring and the No. 2 semi-ring are consistent with the outer diameter of the barrel, the No. 1 semi-ring and the No. 2 semi-ring are slidably connected to the barrel, the inner sides of the No. 1 semi-ring and the No. 2 semi-ring are respectively provided with a No. 1 semi-ring inner ring and a No. 2 semi-ring inner ring, the No. 1 semi-ring inner ring and the No. 2 semi-ring inner ring are adapted to the annular groove, and the No. 1 semi-ring inner ring The inner ring of the No. 1 and No. 2 semi-rings are slidably connected to the ring grooves respectively, and the upper parts of the No. 1 and No. 2 semi-rings are respectively provided with a No. 1 and No. 2 semi-ring guide ring and a No. 2 semi-ring guide groove, and the No. 1 and No. 2 semi-ring guide ring are slidably connected to the No. 2 semi-ring guide groove. A spring is arranged between the No. 1 and No. 2 semi-rings, and the spring is sleeved on the outer sides of the No. 1 and No. 2 semi-ring guide rings and the No. 2 semi-ring guide grooves, and the two sides of the spring respectively press against the end faces of the No. 1 and No. 2 semi-ring guide rings and the No. 2 semi-ring guide grooves. In normal state, the lower parts of each No. 1 and No. 2 semi-rings are positioned on both sides of the partition under the action of the springs, and the No. 1 and No. 2 semi-rings close the bottom groove of the barrel.

[0008] The movable ring is a tubular structure, with a screw hole on the upper part of the movable ring, the screw hole is threadedly connected to a lead screw, both sides of the lead screw are rotatably connected to the lead screw seats on the upper parts of the bearing seats on both sides, and the inner side of the movable ring is slidably connected to the outer side of the opening and closing device.

[0009] A moving ring bottom groove is provided at the lower part of the moving ring, and two symmetrical driving grooves are provided on the cylindrical surface of the moving ring on both sides of the moving ring bottom groove. A straight groove is provided in the middle of the driving groove, and two symmetrical inclined grooves are provided on both sides of the straight groove. A No. 1 half ring pin and a No. 2 half ring pin are respectively provided on the outer sides of the No. 1 half ring and the No. 2 half ring, and the No. 1 half ring pin and the No. 2 half ring pin are respectively slidably connected to the corresponding driving grooves.

[0010] Beneficial effect: the reversing device of the present invention that moves back and forth in a circular motion drives the barrel to move back and forth in a circular motion, the gear of the reversing device and the first rack and the second rack cooperate with each other to make the front and rear sides of the barrel move along the axial direction of the barrel, after the moving ring moves, the opening and closing device entering the inside of the moving ring is opened, and the fertilizer flows out from the opening and closing device opened by the moving ring and the bottom groove of the barrel, so that the fertilizer covers the fertilization area, and the speed of the motor can be adjusted to adjust the amount of fertilizer, and the rotating screw not only plays a feeding role but also can stir the fertilizer evenly, and the entire fertilization process does not require manual intervention, thus avoiding damage to the root system of crops by fertilizer, with a high degree of automation, improved fertilization efficiency, and labor savings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of the agricultural fertilization device described in the present invention.

[0012] Figure 2 This is a schematic diagram of the structure of the barrel, spiral shaft, moving ring, and opening and closing device described in the present invention.

[0013] Figure 3The figure is a schematic diagram of the frame structure of the present invention.

[0014] Figure 4 It is a schematic diagram of the bearing seat structure of the present invention.

[0015] Figure 5 It is a schematic diagram of the barrel structure of the present invention.

[0016] Figure 6 It is a schematic diagram of the cross-sectional structure of the barrel described in the present invention.

[0017] Figure 7 It is a schematic diagram of the spiral shaft structure of the present invention.

[0018] Figure 8 This is a schematic diagram of the mobile ring structure of the present invention.

[0019] Fig. 9 It is a schematic diagram of the side structure of the moving ring described in the present invention.

[0020] Fig.10 This is a schematic diagram of the lead screw structure of the present invention.

[0021] Fig.11 It is a schematic diagram of the structure of the opening and closing device described in the present invention.

[0022] Fig.12 This is a schematic diagram of the structure of the first half ring described in the present invention.

[0023] Fig.13 This is a schematic diagram of the second half ring structure of the present invention.

[0024] Fig.14 It is a schematic structural diagram of the reversing device described in the present invention.

[0025] Fig.15 The figure is a schematic diagram of the structure of the power device described in the present invention. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below according to the accompanying drawings and embodiments: refer to Figure 1 , 2 An agricultural fertilizing device includes a frame 110, wherein bearing seats 120 are slidably connected to both sides of the frame 110, one side of the bearing seat 120 is connected to a power device 400, a barrel 130 is connected between the two bearing seats 120, one side of the barrel 130 is connected to a hopper 170, a screw shaft 140 is rotatably connected in the barrel 130, a group of opening and closing devices 200 are connected to the cylindrical surface of the barrel 130, a moving ring 150 is connected to the outside of the opening and closing device 200, a lead screw 160 is connected to the upper part of the moving ring 150, the lead screw 160 is connected to the bearing seats 120 on both sides, one side of the lead screw 160 is connected to a reversing device 300, and the reversing device 300 is connected to the frame 110.

[0027] refer to Figures 1 to 7 A slide seat 111 is provided on each side of the left and right sides of the frame 110, and each slide seat 111 is slidably connected to the bearing seat slider 121 at the lower part of the bearing seat 120. The two sides of the barrel 130 are fixed in the bearing seats 120 on both sides. The right side of the barrel 130 is fixedly connected to the hopper 170. The barrel 130 is a tubular structure with a closed left side. A spiral shaft hole 131 is provided on the closed surface of the left side of the barrel 130. The spiral shaft hole 131 is rotatably connected to the intermediate shaft of the spiral shaft 140. The left side of the intermediate shaft of the spiral shaft 140 is fixedly connected to the output shaft of the motor 180, and the motor 180 is fixed on the left side of the barrel 130.

[0028] refer to Fig.15 The power device 400 includes a power seat 410, the side of the power seat 410 is rotatably connected to two pulleys 420, one of the pulleys 420 has an intermediate shaft connected to a motor, the outer sides of the two pulleys 420 are rotatably connected to a belt 430, the outer sides of the belt 430 are fixedly connected to a follower block 450, a follower block shaft 451 on one side of the follower block 450 is slidably connected to a sliding frame waist groove 441 on the side of the sliding frame 440, the sliding frame 440 is slidably connected to two guide rods 411 of the power seat 410, and the connecting rod 123 on the side of the left bearing seat 120 is rotatably connected to the sliding frame hole 442 on the side of the sliding frame 440. When the motor connected to the power device 400 is started, the motor drives the pulley 420 to rotate, the belt 430 rotates around the two pulleys 420, the pulley 420 drives the follower block 450 to move together, the follower block 450 drives the sliding frame 440 to move back and forth in a circular motion, the sliding frame 440 drives the barrel 130 and the screw shaft 140 to move back and forth in a circular motion through the bearing seat 120, the motor 180 starts to drive the screw shaft 140 to rotate, and when the screw shaft 140 rotates, it drives the fertilizer in the hopper 170 to move along the barrel 130.

[0029] refer to Figure 5 to Figure 6 , Figure 11 to Figure 13The lower part of the barrel 130 is provided with a barrel bottom groove 132 for the fertilizer to flow out, and a partition 136 is provided in the middle of the barrel bottom groove 132. A group of annular grooves 133 are evenly distributed along the axial direction on the cylindrical surface of the barrel 130, and an opening and closing device 200 is provided in each annular groove 133. The opening and closing device 200 includes a first semi-ring 210 and a second semi-ring 220. The inner diameters of the first semi-ring 210 and the second semi-ring 220 are consistent with the outer diameter of the barrel 130. The first semi-ring 210 and the second semi-ring 220 are slidably connected to the barrel 130. The inner sides of the first semi-ring 210 and the second semi-ring 220 are respectively provided with a first semi-ring inner ring 211 and a second semi-ring inner ring 221. The first semi-ring inner ring 211 and the second semi-ring inner ring 221 are adapted to the annular groove 133, and the first semi-ring inner ring 220 is adapted to the annular groove 133. The inner rings 221 of the No. 11 and No. 2 half rings are respectively slidably connected to the ring groove 133, and the upper parts of the No. 1 half ring 210 and the No. 2 half ring 220 are respectively provided with a No. 1 half ring guide ring 213 and a No. 2 half ring guide groove 223, and the No. 1 half ring guide ring 213 is slidably connected to the No. 2 half ring guide groove 223. A spring 230 is arranged between the No. 1 half ring 210 and the No. 2 half ring 220, and the spring 230 is sleeved on the outer sides of the No. 1 half ring guide ring 213 and the No. 2 half ring guide groove 223, and the two sides of the spring 230 are respectively against the end faces of the No. 1 half ring guide ring 213 and the No. 2 half ring guide groove 223. In normal state, the lower parts of each No. 1 half ring 210 and the No. 2 half ring 220 are positioned on both sides of the partition 136 under the action of the spring 230, and the No. 1 half ring 210 and the No. 2 half ring 220 close the bottom groove 132 of the barrel.

[0030] refer to Figure 1 to Figure 2 , Figure 8 to Figure 9 The movable ring 150 is a tubular structure, and a screw hole 155 is provided on the upper part of the movable ring 150. The screw hole 155 is threadedly connected to the screw 160. The two sides of the screw 160 are rotatably connected to the screw seat 122 on the upper part of the bearing seat 120 on both sides. The inner side of the movable ring 150 is slidably connected to the outer side of the opening and closing device 200.

[0031] refer to Figures 1 to 7A moving ring bottom groove 151 is provided at the lower part of the moving ring 150, and two symmetrical driving grooves 152 are provided on the cylindrical surface of the moving ring 150 on both sides of the moving ring bottom groove 151. A straight groove 153 is provided in the middle of the driving groove 152, and two symmetrical oblique grooves 154 are provided on both sides of the straight groove 153. A first half ring pin 212 and a second half ring pin 222 are respectively provided on the outer sides of the first half ring 210 and the second half ring 220, and the first half ring pin 212 and the second half ring pin 222 are respectively slidably connected to the corresponding driving grooves 152. When the lead screw 160 rotates, it drives the moving ring 150 to move axially along the barrel 130. When the moving ring 150 moves axially, if the No. 1 half ring 210 and the No. 2 half ring 220 of the opening and closing device 200 enter the inner side of the moving ring 150, the No. 1 half ring pin 212 of the No. 1 half ring 210 and the No. 2 half ring pin 222 of the No. 2 half ring 220 are slidably connected to the driving groove 152, and the inclined groove 154 drives the No. 1 half ring 210 and the No. 2 half ring 220 on both sides to move upward. When the No. 1 half ring 210 and the No. 2 half ring 220 enter the straight groove 153, an opening is formed between the No. 1 half ring 210 and the No. 2 half ring 220, and the fertilizer will flow out of the driving groove 152. After the opening and closing device 200 is separated from the moving ring 150, it will be closed again under the action of the spring 230.

[0032] refer to Fig.14 The reversing device 300 includes a sleeve 310, and one-way bearings 320 are fixedly connected to both sides of the sleeve 310. The outer side of each one-way bearing 320 is fixedly connected to a gear 330. The sleeve 310 is slidably connected to the spline shaft 161 on one side of the screw 160. The middle of the sleeve 310 is connected with a bolt 340, and the bolt 340 fixes the sleeve 310 and the screw 160.

[0033] refer to Figures 1 to 3The left side of the frame 110 is provided with a support frame 112, the rear side of the support frame 112 is provided with a rack frame 113, the front side of the support frame 112 is fixedly connected to the second rack 115, and the lower part of the rack frame 113 is fixedly connected to the first rack 114. When the lead screw 160 moves to the front and rear sides, the two gears 330 are respectively meshed with the second rack 115 and the first rack 114. When the gear 330 is meshed with the first rack 114 and the second rack 115, the first rack 114 and the second rack 115 drive the gear 330 and the lead screw 160 to rotate, and the lead screw 160 drives the moving ring 150 to move a certain distance The function of the one-way bearing is that when the reversing device 300 approaches the first rack 114 and the second rack 115, the first rack 114 and the second rack 115 will drive the gear 330 to rotate, and when the reversing device 300 leaves the first rack 114 and the second rack 115, the first rack 114 and the second rack 115 will not drive the gear 330 to rotate. Gears 330 are provided on both sides of the reversing device 300. When the moving ring 150 moves to one side, the moving direction of the moving ring 150 can be changed by switching the gear 330, so as to achieve the purpose of resetting the device or changing the fertilization direction.

[0034] An operating method of an agricultural fertilizing device includes the following steps. In the first step, when the device is used, the device is installed on a plot of land that needs to be fertilized, a plug tray is placed in the middle of the device, and fertilizer is put into a hopper 170. In the second step, a power device 400 and a motor 180 are started. When the power device 400 is started, a sliding frame 440 drives a barrel 130 and a screw shaft 140 to move back and forth through a bearing seat 120. The motor 180 is started to drive the screw shaft 140 to rotate. When the screw shaft 140 rotates, the fertilizer in the hopper 170 is driven to move along the barrel 130. At the beginning, the lower parts of all opening and closing devices 200 are in a closed state, and the fertilizer will fill the barrel 130. When the barrel 130 moves to the front or rear side, the first rack 114 or the second rack 115 drives the gear 330 to rotate, and the gear 330 drives the lead screw 160 to rotate. The lead screw 160 drives the moving ring 150 to move to the other side. The moving ring 15 When the barrel 130 moves to the other side, the moving ring 150 is driven to move a certain distance along the axial direction of the barrel 130 again, the opening and closing device 200 entering the moving ring 150 is opened, and the opening and closing device 200 leaving the moving ring 150 is closed again, and the power device 400 drives the barrel 130 to return, and the fertilizer is thrown back along the new position. The power device 400 rotates continuously, and the moving ring 150 moves axially continuously. The fertilizer is thrown in the area covered by the moving ring 150. The speed of the motor 180 can be adjusted to adjust the speed of the motor 180 and the amount of fertilizer output.

[0035] The reversing device 300 of the present invention that reciprocates back and forth drives the barrel 130 to reciprocate back and forth, and the gear 330 of the reversing device 300 and the first rack 114 and the second rack 115 cooperate with each other to make the front and rear sides of the barrel 130 move along the axial direction of the barrel 130. After the moving ring 150 moves, the opening and closing device 200 entering the inside of the moving ring 150 is opened, and the fertilizer flows out from the opening and closing device 200 opened by the moving ring 150 and the bottom groove 132 of the barrel, forming a long strip opening, so that the fertilizer covers the fertilization area, and the rotation speed of the motor 180 can be adjusted to adjust the fertilizer amount. The rotating screw 160 not only plays a feeding role but also can stir the fertilizer evenly. The entire fertilization process does not require manual intervention, avoiding damage to the root system of crops by fertilizers. The degree of automation is high, the fertilization efficiency is improved, and labor is saved.

Claims

1. An agricultural fertilization device, characterized in that : It comprises a frame (110), wherein the two sides of the frame (110) are slidably connected to bearing seats (120), one side of the bearing seat (120) is connected to a power device (400), the two bearing seats (120) are connected to a barrel (130), one side of the barrel (130) is connected to a hopper (170), the barrel (130) is rotatably connected to a screw shaft (140), the cylindrical surface of the barrel (130) is connected to a group of opening and closing devices (200), the outer side of the opening and closing device (200) is connected to a moving ring (150), the upper part of the moving ring (150) is connected to a lead screw (160), the lead screw (160) is connected to the bearing seats (120) on both sides, one side of the lead screw (160) is connected to a reversing device (300), and the reversing device (300) is connected to the frame (110).

2. An agricultural fertilization device according to claim 1, characterized in that : A slide seat (111) is provided on each of the left and right sides of the frame (110), and each slide seat (111) is slidably connected to a bearing seat slider (121) at the bottom of the bearing seat (120). Both sides of the barrel (130) are fixed in the bearing seats (120) on both sides. The right side of the barrel (130) is fixedly connected to the hopper (170). The barrel (130) is a tubular structure with a closed left side. A spiral shaft hole (131) is provided on the closed surface on the left side of the barrel (130). The spiral shaft hole (131) is rotatably connected to the intermediate shaft of the spiral shaft (140). The left side of the intermediate shaft of the spiral shaft (140) is fixedly connected to the output shaft of the motor (180), and the motor (180) is fixed on the left side of the barrel (130).

3. An agricultural fertilization device according to claim 2, characterized in that The power device (400) comprises a power seat (410), the side of the power seat (410) is rotatably connected to two pulleys (420), the intermediate shaft of the pulley (420) is connected to the motor, the outer sides of the two pulleys (420) are rotatably connected to the belt (430), the outer side of the belt (430) is fixedly connected to the follower block (450), the follower block shaft (451) on one side of the follower block (450) is slidably connected to the sliding frame waist groove (441) on the side of the sliding frame (440), the sliding frame (440) is slidably connected to the two guide rods (411) of the power seat (410), and the connecting rod (123) on the side of the left bearing seat (120) is rotatably connected to the sliding frame hole (442) on the side of the sliding frame (440).

4. An agricultural fertilization device according to claim 3, characterized in that The barrel (130) is provided with a barrel bottom groove (132) for the fertilizer to flow out at the bottom, a partition (136) is provided in the middle of the barrel bottom groove (132), a group of annular grooves (133) are evenly distributed along the axial direction on the cylindrical surface of the barrel (130), each annular groove (133) is provided with an opening and closing device (200), the opening and closing device (200) comprises a first half ring (210) and a second half ring (220), the inner diameters of the first half ring (210) and the second half ring (220) are consistent with the outer diameter of the barrel (130), the first half ring (210) and the second half ring (220) are slidably connected to the barrel (130), and the inner sides of the first half ring (210) and the second half ring (220) are provided with a first half ring inner ring (211) and a second half ring inner ring (221), respectively. The first half ring (210) and the second half ring (220) are respectively slidably connected to the ring groove (133), and the upper parts of the first half ring (210) and the second half ring (220) are respectively provided with a first half ring guide ring (213) and a second half ring guide groove (223), the first half ring guide ring (213) is slidably connected to the second half ring guide groove (223), and a spring (230) is provided between the first half ring (210) and the second half ring (220), and the spring (230) is sleeved on the first half ring guide ring ( The first half ring (213) and the second half ring guide groove (223) are arranged outside the first half ring guide ring (213) and the second half ring guide groove (223), and the two sides of the spring (230) respectively press against the end faces of the first half ring guide ring (213) and the second half ring guide groove (223), and the lower part of each first half ring (210) and the second half ring (220) is positioned on both sides of the partition (136) under the action of the spring (230), and the first half ring (210) and the second half ring (220) close the bottom groove (132) of the barrel.

5. An agricultural fertilization device according to claim 4, characterized in that The upper portion of the movable ring (150) is provided with a screw hole (155), the screw hole (155) is threadedly connected to a lead screw (160), both sides of the lead screw (160) are rotatably connected to lead screw seats (122) on the upper portions of the bearing seats (120) on both sides, and the inner side of the movable ring (150) is slidably connected to the outer side of the opening and closing device (200).

6. The agricultural fertilization device according to claim 1, characterized in that The movable ring (150) is provided with a movable ring bottom groove (151) at the lower part, and two symmetrical driving grooves (152) are provided on the cylindrical surface of the movable ring (150) on both sides of the movable ring bottom groove (151), and a straight groove (153) is provided in the middle of the driving groove (152), and two symmetrical oblique grooves (154) are provided on both sides of the straight groove (153), and a first half ring pin (212) and a second half ring pin (222) are provided on the outer sides of the first half ring (210) and the second half ring (220), respectively, and the first half ring pin (212) and the second half ring pin (222) are respectively slidably connected to the corresponding driving groove (152).

7. The agricultural fertilization device according to claim 1, characterized in that The reversing device (300) comprises a shaft sleeve (310), one-way bearings (320) are fixedly connected to both sides of the shaft sleeve (310), the outer side of each one-way bearing (320) is fixedly connected to a gear (330), the shaft sleeve (310) is slidably connected to a spline shaft (161) on one side of the lead screw (160), and a bolt (340) is connected in the middle of the shaft sleeve (310), and the bolt (340) fixes the shaft sleeve (310) and the lead screw (160).

8. The agricultural fertilization device according to claim 1, characterized in that The left side of the frame (110) is provided with a support frame (112), the rear side of the support frame (112) is provided with a rack frame (113), the front side of the support frame (112) is fixedly connected to the second rack (115), and the lower part of the rack frame (113) is fixedly connected to the first rack (114). When the lead screw (160) moves to the front and rear sides, the two gears (330) respectively mesh with the second rack (115) and the first rack (114). When the gear (330) meshes with the first rack (114) and the second rack (115), the first rack (114) and the second rack (115) drive the second rack (114) and the second rack (115) to rotate. The gear (330) and the lead screw (160) rotate, and the lead screw (160) drives the moving ring (150) to move a certain distance. When the reversing device (300) approaches the first rack (114) and the second rack (115), the first rack (114) and the second rack (115) drive the gear (330) to rotate. When the reversing device (300) leaves the first rack (114) and the second rack (115), the first rack (114) and the second rack (115) will not drive the gear (330) to rotate. Gears (330) are provided on both sides of the reversing device (300).

Images