Transmission mechanism for ditcher

Abstract

The transmission mechanism comprises a gearbox body and a planetary gear mechanism, the planetary gear mechanism comprises a sun gear, a planet gear, a planet shaft, an inner gear ring, a fixing disc and an output shaft, the output shaft is rotatably installed at the output end of the gearbox body, an installation portion is arranged at the inner end of the output shaft, and the sun gear is arranged on the installation portion. The fixing disc and the mounting part are axially fixed at intervals, a mounting space is formed between the fixing disc and the mounting part, the planet shafts are circumferentially and uniformly distributed in the mounting space between the fixing disc and the mounting part, the fixing disc or / and the mounting part is / are provided with rotation stopping grooves, and the planet shafts are provided with rotation stopping parts matched with the rotation stopping grooves. The rotation stopping part is positioned and inserted in the rotation stopping groove, the planet wheel is rotatably installed on the planet shaft, the sun wheel is arranged in the middle of the planet wheel and is in meshing transmission with the planet wheel, the inner gear ring is fixedly arranged on the periphery of the planet wheel and is in meshing transmission with the planet wheel, and the problem that the planet shaft rotates relative to the output shaft to cause failure of a transmission mechanism is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ditcher, especially a transmission mechanism for ditcher. BACKGROUND

[0002] The ditcher is a kind of engineering machinery for excavating ditch, and is used for efficiently and accurately excavating ditch in multiple fields, improving engineering efficiency and quality, such as agricultural irrigation, drainage system, cable laying, pipeline installation, road construction, landscaping and building construction.

[0003] The ditcher comprises a rack, a rotating shaft rotatably connected to the rack, a driving device for driving the rotating shaft to rotate through a transmission mechanism, a driving wheel fixedly connected to the rotating shaft, a guide rail telescopically connected to the rack, a driven wheel rotatably connected to the guide rail and a chain wound around the driving wheel and the driven wheel.The driving device is fixedly connected to the rack, and the transmission mechanism is a planetary gear box.The existing planetary gear box comprises a gear box and a planetary transmission mechanism arranged in the gear box.The planetary transmission mechanism comprises a sun gear, a ring gear and a planet carrier.Power is input from the sun gear and output from the output end of the planet carrier.However, the planet shaft of the planetary gear is connected to the planet carrier or the output shaft by screw thread connection.As the planet shaft rotates relative to the planet carrier or the output shaft, the screw thread connection may be released during the rotation, causing the planetary gear box to fail.In addition, high pressure may be generated inside the planetary gear box due to work or high temperature, which cannot be discharged in time, affecting the service life of the parts inside the planetary gear box, and thus the existing planetary gear box needs to be improved. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims to provide a transmission mechanism for ditcher, and the planet shaft is fixedly connected to the mounting portion of the output shaft and the fixing disc through the rotation-stopping part and the rotation-stopping groove, so as to avoid the rotation of the planet shaft relative to the output shaft, and effectively solve the problem of the transmission mechanism failure caused by the rotation of the planet shaft relative to the output shaft.

[0005] The technical purpose is achieved by the following technical scheme: a transmission mechanism for a ditching machine, comprising a gear box body and a planetary gear mechanism, the gear box body is provided with a containing cavity, the planetary gear mechanism comprises a sun gear, a planet gear, a planet shaft, an inner ring gear, a fixed disc and an output shaft, the output shaft is rotatably installed on the output end of the gear box body, the inner end of the output shaft is provided with a mounting portion, the fixed disc is axially spaced from the mounting portion, and a mounting space is formed between the fixed disc and the mounting portion, the planet shaft is provided with a plurality of mounting spaces which are circumferentially distributed between the fixed disc and the mounting portion, the fixed disc or / and the mounting portion is provided with a rotation stopping groove, the planet shaft is provided with a rotation stopping portion matched with the rotation stopping groove, the rotation stopping portion is positioned and inserted into the rotation stopping groove, the planet gear is in one-to-one correspondence with the planet shaft and is rotatably installed on the planet shaft, the sun gear is arranged in the planet gear and is in meshing transmission with the planet gear, and the inner ring gear is fixedly arranged at the position corresponding to the outer periphery of the planet gear of the gear box body and is in meshing transmission with the planet gear.

[0006] Further, the first end of the planet shaft is provided with a rotation stopping portion, the second end of the planet shaft is provided with a plug-in portion, the fixed disc is provided with a rotation stopping groove matched with the rotation stopping portion, the mounting portion is provided with a plug-in groove matched with the plug-in portion, and the planet shaft is clamped between the mounting portion and the fixed disc.

[0007] Further, the rotation stopping portion is a square structure, and the rotation stopping groove is a square groove matched with the rotation stopping portion.

[0008] Further, a plurality of connecting columns are arranged between the fixed disc and the mounting portion, the fixed disc, the connecting columns and the mounting portion are fixedly connected into an integrated whole through fasteners, so that the fixed disc and the mounting portion are axially spaced and fixed, and the connecting columns are arranged in a staggered manner with the planet gear.

[0009] Further, the input end of the gear box body is sealed by cooperating with the end cover of the driving device, and the output shaft of the driving device is connected with the sun gear.

[0010] Further, the gear box body comprises a first box body, the inner ring gear and a second box body which are fixedly connected into an integrated whole, the first box body is provided with a first mounting groove for partially containing the inner ring gear, the second box body is provided with a second mounting groove for containing part of the inner ring gear, and sealing members are arranged between the first box body and the inner ring gear and between the second box body and the inner ring gear.

[0011] Further, two groups of first bearings for supporting the output shaft are arranged in the first box body, the output end of the output shaft protrudes out of the gear box body, and a driving wheel is fixedly installed at the position of the output shaft protruding out of the gear box body.

[0012] Further, an oil injection hole is arranged on the gear box body, and a plunger which can be opened and closed is arranged at the position of the gear box body corresponding to the oil injection hole.

[0013] Further, the planet wheel is rotatably connected to the outer periphery of the planet shaft through a support.

[0014] Further, the gear box body side end is provided with a mounting port communicating with the containing cavity, and the mounting port is mounted with a breather valve.

[0015] In summary, the utility model has the following beneficial effects:

[0016] 1. The utility model discloses a transmission mechanism for a ditching machine, the planet shaft is rotatably connected to the outer periphery of the planet shaft through a support.

[0017] 2. The utility model discloses a transmission mechanism for a ditching machine, the planet shaft is rotatably connected to the outer periphery of the planet shaft through a support. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic diagram of the utility model.

[0019] Figure 2 It is the sectional view of the utility model.

[0020] Figure 3 It is the exploded view of the utility model.

[0021] Figure 4 It is the exploded view of the planetary gear mechanism of the utility model.

[0022] Figure 5 It is the structure schematic diagram when the driving device is connected with the gear box body.

[0023] Figure 6 It is the structure schematic diagram when the transmission mechanism is installed in the ditching machine.

[0024] In the drawing: 10, gear box body;11, containing cavity;12, first box body;13, second box body;14, first bearing;15, plunger;16, mounting port;17, breather valve;20, planetary gear mechanism;21, sun gear;22, planet wheel;221, support;23, planet shaft;231, rotation stopping part;232, plug-in part;24, inner ring gear;25, fixed disc;251, rotation stopping groove;26, output shaft;261, mounting part;2611, insertion slot;27, connecting column;30, driving device;31, end cover;40, driving wheel;50, cutter chain. DETAILED DESCRIPTION

[0025] The utility model makes further illustration in combination with the drawings.

[0026] As Figures 1-6 The utility model discloses a transmission mechanism for ditcher, including gear box body 10 and planetary gear mechanism 20, be provided with accommodation cavity 11 in gear box body 10, planetary gear mechanism 20 includes sun gear 21, planetary gear 22, planet shaft 23, internal toothed ring 24, fixed disc 25 and output shaft 26, output shaft 26 rotatablely installed at the output end of gear box body 10, specifically, output shaft 26 sets up at the output end of gear box body 10 and output shaft 26 part stretches out to gear box body 10 outside, the inner end of output shaft 26 is equipped with mounting portion 261, that is, the one end in gear box body 10 is equipped with mounting portion 261, and mounting portion 261 is circular ring structure, and fixed disc 25 is axially spaced with mounting portion 261 fixed, and mounting space is formed between fixed disc 25 and mounting portion 261, and planet shaft 23 is set up with multiple and is uniformly distributed in the mounting space between fixed disc 25 and mounting portion 261, and fixed disc 25 or mounting portion 261 is equipped with rotation stopping groove 251, and planet shaft 23 is equipped with the rotation stopping portion 231 matched with rotation stopping groove 251, and the rotation stopping portion 231 is positioned and inserted in rotation stopping groove 251, so that planet shaft 23 cannot rotate relative to output shaft 26 and fixed disc 25.

[0027] The planetary gear 22 corresponds with the planet shaft 23 and is rotatably installed on the planet shaft 23, for example, the planet shaft 23 is provided with three and is uniformly distributed in the mounting space, the planetary gear 22 is provided with three and is correspondingly installed on the planet shaft 23, the sun gear 21 is arranged in the planetary gear 22 and is engaged with the planetary gear 22 to drive, that is, the sun gear 21 is arranged in the three planetary gears 22 and is engaged with the three planetary gears 22 to drive synchronously, the internal toothed ring 24 is fixedly arranged at the position corresponding to the outer circumference of the planetary gear 22 of the gear box body 10, and the internal toothed ring 24 is engaged with the planetary gear 22 to drive, the input end of the transmission mechanism is input by the sun gear 21, and greater torque is output by the output shaft 26 after speed reduction by the cooperation of the planetary gear 22 and the internal toothed ring 24.

[0028] In some embodiments, the first end of the planet shaft 23 is provided with the rotation stopping portion 231, the second end of the planet shaft 23 is provided with the plug-in portion 232, the fixed disc 25 is provided with the rotation stopping groove 251 matched with the rotation stopping portion 231, the mounting portion 261 is provided with the plug groove 2611 matched with the plug-in portion 232, and the planet shaft 23 is clamped between the mounting portion 261 and the fixed disc 25.

[0029] In some embodiments, the rotation stopping portion 231 is a square structure, the rotation stopping groove 251 is a square groove and is matched with the rotation stopping portion 231, and of course, as an equivalent alternative means, the rotation stopping portion 231 can be other rotation stopping structures, such as polygon, semicircle, etc.

[0030] In some embodiments, a plurality of connecting columns 27 are arranged between the fixing disc 25 and the mounting portion 261, the fixing disc 25, the connecting columns 27 and the mounting portion 261 are fixedly connected as a whole by fasteners, so that the fixing disc 25 and the mounting portion 261 are fixedly spaced axially, and the connecting columns 27 are arranged staggered with the planetary gear 22, specifically, one end of the connecting column 27 is attached to the fixing disc 25, and the other end of the connecting column 27 is attached to the mounting portion 261, and the connecting columns 27 are three in number and are circumferentially arranged between the fixing disc 25 and the mounting portion 261.

[0031] In some embodiments, the input end of the gear box body 10 is sealed by cooperating with the end cover 31 of the driving device 30, so that the accommodating cavity 11 in the gear box body 10 forms a sealed chamber, the output shaft of the driving device 30 is connected with the sun gear 21, specifically, the output shaft 26 of the driving device 30 is provided with a gear portion on the outer periphery, the sun gear 21 is provided with a gear groove matched with the gear portion, and the other end of the sun gear 21 away from the output shaft of the driving device 30 is connected with a connecting screw, so that the sun gear 21 and the output shaft of the driving device 30 are fixedly connected by the connecting screw, and the output shaft of the driving device 30 is fixedly connected with the sun gear 21.

[0032] In some embodiments, the gear box body 10 includes a first box body 12, an inner ring gear 24 and a second box body 13 fixedly connected as a whole, the first box body 12 is provided with a first mounting groove for partially accommodating the inner ring gear 24, and the second box body 13 is provided with a second mounting groove for accommodating part of the inner ring gear 24, and a sealing member is arranged between the first box body 12 and the inner ring gear 24 and between the second box body 13 and the inner ring gear 24, so that the gear box body 10 is designed as the first box body 12, the inner ring gear 24 and the second box body 13 arranged in a split type, which can effectively reduce the processing difficulty and cost of the gear box body 10, and can effectively improve the assembly of the planetary gear mechanism 20. Figure 2 As shown in FIG. 5, the outer periphery of the first mounting groove and the second mounting groove has a periphery arranged around the outer periphery of the inner ring gear 24, which limits the inner ring gear 24 from moving radially.

[0033] In some embodiments, two groups of first bearings 14 for supporting the output shaft 26 are arranged in the first box body 12, and the output end of the output shaft 26 protrudes out of the gear box body 10, and the driving wheel 40 is fixedly installed at the position where the output shaft 26 protrudes out of the gear box body 10. Specifically, the input shaft includes a protruding section, a supporting section and a mounting portion 261, wherein the driving wheel 40 is fixedly installed on the outer periphery of the protruding section for mounting the cutter chain 50 of the ditcher, the first bearings 14 are installed on the outer periphery of the supporting section for stably supporting the output shaft 26, and the outer diameter of the mounting portion 261 is larger than that of the supporting section for cooperating with the fixing disc 25 to mount the planetary shaft 23.

[0034] In some embodiments, the gear box body 10 is provided with an oil injection hole, and the gear box body 10 is provided with an openable plunger 15 corresponding to the position of the oil injection hole. On the one hand, the oil injection hole is used to inject lubricating oil into the gear box to ensure that the gears and other transmission parts are fully lubricated, reduce friction and wear, and prolong the service life. On the other hand, the lubricating oil circulates in the gear box to help remove heat generated during operation, prevent overheating, and maintain the normal operating temperature of the gear box.

[0035] In some embodiments, the planetary gear 22 is rotatably connected to the outer periphery of the planetary shaft 23 through a support 221, which includes but is not limited to a needle, a bearing, etc. The provision of the support 221 can reduce the friction between the planetary gear 22 and the planetary shaft 23, thereby improving the service life of the planetary gear 22.

[0036] In some embodiments, the gear box body 10 is provided with a mounting port 16 communicating with the containing cavity 11, and the mounting port 16 is mounted with a breather valve 17. Specifically, the breather valve 17 is arranged at one end of the gear box body 10 close to the sun gear 21. The breather valve 17 is arranged on the gear box body 10 to balance the pressure inside and outside the gear box body 10, thereby improving the service life of the gears and other parts. Specifically, when the gear box body 10 generates high temperature due to long-term operation, the exhalation valve of the breather valve 17 opens to discharge the excessive pressure in the tank, so that the pressure in the tank is balanced with the atmospheric pressure.

[0037] The utility model discloses a transmission mechanism of ditcher, planetary axle 23 passes through the rotation of stop portion 231 and stop groove 251 and stops the cooperation, avoids the rotation of planetary axle 23 relative to output shaft 26, makes planetary axle 23 be steady in the installation between the installation part 261 of output shaft 26 and fixed disc 25, thereby effectively solve the problem that planetary axle 23 rotates relative to output shaft 26 and causes transmission mechanism to fail.

[0038] The above is only the preferred embodiment of the utility model, so equivalent changes or modifications made according to the structure, features and principles described in the utility model patent application range are included in the utility model patent application range.

Claims

1. A transmission mechanism for a trenching machine, characterized in that: The system includes a gearbox housing (10) and a planetary gear mechanism (20). The gearbox housing (10) has a receiving cavity (11). The planetary gear mechanism (20) includes a sun gear (21), planet gears (22), planet shafts (23), an internal gear ring (24), a fixed disk (25), and an output shaft (26). The output shaft (26) is rotatably mounted on the output end of the gearbox housing (10). The inner end of the output shaft (26) is provided with a mounting part (261). The fixed disk (25) and the mounting part (261) are axially spaced and fixed, and an installation space is formed between the fixed disk (25) and the mounting part (261). Multiple planet shafts (23) are provided and are evenly distributed circumferentially on the fixed disk (25). In the installation space between the fixed plate (25) and the mounting part (261), the fixed plate (25) and / or the mounting part (261) are provided with anti-rotation grooves (251). The planetary shaft (23) is provided with anti-rotation parts (231) that match the anti-rotation grooves (251). The anti-rotation parts (231) are positioned and inserted into the anti-rotation grooves (251). The planetary gears (22) correspond one-to-one with the planetary shafts (23) and are rotatably mounted on the planetary shafts (23). The sun gear (21) is located in the middle of the planetary gears (22) and meshes with the planetary gears (22) for transmission. The internal gear ring (24) is fixedly located on the gearbox housing (10) at the position corresponding to the outer circumference of the planetary gears (22). The internal gear ring (24) meshes with the planetary gears (22) for transmission.

2. The transmission mechanism for a trencher according to claim 1, characterized in that: The first end of the planetary shaft (23) is provided with an anti-rotation part (231), the second end of the planetary shaft (23) is provided with a plug-in part (232), the fixed plate (25) is provided with an anti-rotation groove (251) that matches the anti-rotation part (231), the mounting part (261) is provided with a slot (2611) that engages with the plug-in part (232), and the planetary shaft (23) is clamped between the mounting part (261) and the fixed plate (25).

3. The transmission mechanism for a trencher according to claim 2, characterized in that: The anti-rotation part (231) has a square structure, and the anti-rotation groove (251) is a square groove that is adapted to the anti-rotation part (231).

4. The transmission mechanism for a trencher according to claim 1, characterized in that: Multiple connecting posts (27) are provided between the fixed disk (25) and the mounting part (261). The fixed disk (25), the connecting posts (27) and the mounting part (261) are fixedly connected as a whole by fasteners, so that the fixed disk (25) and the mounting part (261) are fixedly spaced axially. The connecting posts (27) are staggered from the planetary gear (22).

5. A transmission mechanism for a trencher according to claim 1, characterized in that: The input end of the gearbox housing (10) is sealed by cooperating with the end cover (31) of the drive device (30), and the output shaft of the drive device (30) is connected to the sun gear (21).

6. A transmission mechanism for a trencher according to claim 1, characterized in that: The gearbox housing (10) includes a first housing (12), an internal gear ring (24), and a second housing (13) fixedly connected as one unit. The first housing (12) is provided with a first mounting groove for partially accommodating the internal gear ring (24), and the second housing (13) is provided with a second mounting groove for partially accommodating the internal gear ring (24). Sealing elements are provided between the first housing (12) and the internal gear ring (24) and between the second housing (13) and the internal gear ring (24).

7. A transmission mechanism for a trencher according to claim 6, characterized in that: The first housing (12) is provided with two sets of first bearings (14) for supporting the output shaft (26). The output end of the output shaft (26) extends out of the gearbox housing (10). A drive wheel (40) is fixedly installed at the position where the output shaft (26) extends out of the gearbox housing (10).

8. A transmission mechanism for a trencher according to claim 1, characterized in that: The gearbox housing (10) is provided with an oil filling hole, and the gearbox housing (10) is provided with an openable and closable plunger (15) at the position corresponding to the oil filling hole.

9. A transmission mechanism for a trencher according to claim 1, characterized in that: The planetary gear (22) is rotatably connected to the outer periphery of the planetary shaft (23) via a support (221).

10. A transmission mechanism for a trencher according to any one of claims 1-9, characterized in that: The gearbox housing (10) has a mounting port (16) on its side that connects to the accommodating cavity (11), and a breather valve (17) is installed in the mounting port (16).

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