Walking driving device

Abstract

The invention discloses a walking driving device which comprises a box body, an input shaft, a driving mechanism and an output shaft are arranged in an inner cavity of the box body, the output shaft is located at one end of the box body, a T-shaped wheel is installed in the middle of the output shaft, the input shaft is located at the other end of the box body and is perpendicular to the output shaft, and one end of the input shaft is connected with the driving mechanism. The output shaft is driven by the driving mechanism to rotate, so that the T-shaped wheel moves along the track, the other end of the input shaft penetrates through the box body and extends out of the box body, an L-shaped support is further arranged in the box body, and one end of the L-shaped support is located on one side of the T-shaped wheel and supports the middle of the output shaft. According to the driving wheel, the speed reducer drives the output shaft to rotate through cooperation of the input shaft, the driving mechanism and the output shaft, and the situation that due to shaking of an existing driving wheel, a main shaft of the driving wheel and the speed reducer are displaced and disengaged is eliminated and avoided through transmission cooperation of all parts of the driving mechanism and the loading capacity of the tapered roller bearing and the radial deep groove ball bearing.

Description

Technical Field

[0001] The present invention relates to the technical field of motor test fixtures, and more specifically, to a traveling drive device. Background Art

[0002] A crane, also known as an overhead crane or a hoist, is mostly used in storage warehouses to lift goods. One of the most important components of a crane is the traveling mechanism, which mainly consists of a motor, a driving wheel, and a track. The motor provides power support for the driving wheel, enabling the driving wheel to move on the track, thereby achieving the effect of moving the traveling mechanism.

[0003] Currently, the driving wheel is an independent component, connected to the reduction gearbox through a coupling, or a reducer with a hollow shaft output is directly sleeved on the main shaft of the driving wheel. Since the overhead crane or the trolley will generate vibrations of different magnitudes during movement, the relative position between the driving wheel with the coupling structure and the reduction gearbox will shift, resulting in frequent damage to the coupling. Moreover, the structure with a hollow shaft reducer will also cause the bending of the main shaft of the driving wheel due to jitter and the weight of the reducer.

[0004] Therefore, a new solution is needed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a traveling drive device.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A traveling drive device includes a box body. An input shaft, a driving mechanism, and an output shaft are provided in the inner cavity of the box body. The output shaft is located at one end of the box body, and both ends thereof are rotatably connected to the two side walls of the box body. A T-shaped wheel is installed in the middle of the output shaft. The input shaft is located at the other end of the box body and is perpendicular to the output shaft. One end of the input shaft is connected to the driving mechanism and drives the output shaft to rotate through the driving mechanism, so that the T-shaped wheel moves along the track. The other end of the input shaft penetrates through the box body and extends outside the box body. An L-shaped bracket is also provided in the box body. One end of the L-shaped bracket is located on one side of the T-shaped wheel and forms a support for the middle part of the output shaft.

[0008] Further, the driving mechanism includes a first intermediate shaft, a second intermediate shaft, a first spiral bevel gear, a second spiral bevel gear, a first gear, a second gear, and a third gear. The first intermediate shaft, the second intermediate shaft, and the output shaft are arranged in parallel. The second spiral bevel gear and the first gear are respectively installed at both ends of the first intermediate shaft. The first spiral bevel gear is installed at one end of the input shaft and meshes with the second spiral bevel gear. The second gear is installed on the second intermediate shaft and meshes with the first gear. The third gear is installed at one end of the output shaft and meshes with the second gear.

[0009] Further, tapered roller bearings are installed at both ends of the input shaft, both ends of the first intermediate shaft, and both ends of the output shaft. The box body is provided with a first installation groove for installing the tapered roller bearings.

[0010] Further, deep groove ball bearings are installed at both ends of the second intermediate shaft. Second installation grooves for installing the deep groove ball bearings are provided at one end of the box body and the L-shaped bracket.

[0011] Further, the output shaft includes a shaft body and shaft end parts arranged at both ends of the shaft body. The shaft body is a multi-stage tapered structure, and the diameter of the shaft body is larger than that of the shaft end parts.

[0012] Further, the shaft body of the output shaft includes a first shaft body section, a second shaft body section, a third shaft body section, and a fourth shaft body section that are connected in sequence. The diameters of the first shaft body section, the second shaft body section, the third shaft body section, and the fourth shaft body section gradually decrease in equal proportion, and a step is formed between adjacent shaft body sections. The T-shaped wheel is installed on the second shaft body section. A cylindrical roller bearing is installed on the third shaft body section. An oil seal spacer is provided between the cylindrical roller bearing and the T-shaped wheel. The oil seal spacer is installed on the second shaft body section, and its two ends respectively abut against the cylindrical roller bearing and the T-shaped wheel.

[0013] Further, a cylindrical roller bearing is installed in the middle of the output shaft. A third installation groove for installing the cylindrical roller bearing is provided at one end of the L-shaped bracket.

[0014] Further, the T-shaped wheel includes a wheel body. A plurality of baffle units are arranged on the outer side surface of the wheel body along its circumference. The baffle units are fan-shaped, and a plurality of baffle units are combined to form an annular baffle. When the baffle unit is subjected to an outward thrust, it forms a detached state separated from the wheel body. When the baffle unit is not stressed or is subjected to an inward pulling force, it forms an abutting state against the wheel body. A sensor for obtaining the state change of the baffle unit is installed on the baffle unit.

[0015] Further, fourth mounting grooves are formed in the outer side surface of the wheel body corresponding to the three end corners of the baffle unit. Dampers are arranged in the fourth mounting grooves. One end of each damper is fixed to the bottom of the fourth mounting groove, and the other end of the damper is hinged to the baffle unit. Springs are sleeved on the dampers. One end of each spring is fixed to the bottom of the fourth mounting groove, and the other end of the spring is fixed to the baffle unit.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. In the present invention, the reducer drives the output shaft to rotate through the cooperation of the input shaft, the driving mechanism and the output shaft. By using the transmission cooperation of the components of the driving mechanism and the load-bearing capacities of the tapered roller bearing and the radial deep groove ball bearing, the displacement and disengagement of the main shaft of the existing driving wheel from the reducer caused by jitter are eliminated and avoided.

[0018] 2. In the present invention, by arranging the L-shaped bracket and using the cooperation of the tapered roller bearing and the L-shaped bracket, the output shaft is supported from multiple directions, improving the bending resistance of the output shaft, and thus effectively increasing the load capacity of the overhead crane.

[0019] 3. In the present invention, the shaft body of the output shaft adopts a multi-stage gradient structure, which is divided into four shaft body segments. The diameters of the four shaft body segments gradually decrease in equal proportion. First, the stress peak is dispersed through the smooth diameter change to avoid stress concentration and improve the bending resistance of the output shaft. Second, the natural frequency of the output shaft is adjusted by changing the mass of each shaft body segment to reduce vibration. Third, the steps formed between adjacent shaft body segments hinder the lubricating oil to prevent lubricating oil leakage, and at the same time, the steps limit the components installed on the shaft body segments.

[0020] 4. In the present invention, by dividing the T-shaped wheel into two parts, namely the wheel body and the baffle, the baffle has two dynamics, namely the disengaged state and the abutted state. By using these two dynamics, the T-shaped wheel can cross the deformed position of the track to avoid jamming. At the same time, the information about the deformation of the track can be obtained by using the sensor to collect the dynamics of the baffle. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the traveling driving device in this embodiment;

[0022] Figure 2 It is a schematic cross-sectional structural diagram of the traveling driving device in this embodiment;

[0023] Figure 3 It is a schematic structural diagram of the output shaft in this embodiment;

[0024] Figure 4 It is a schematic structural diagram of the T-shaped wheel in this embodiment;

[0025] Figure 5 This is a schematic cross-sectional structure diagram of the T-shaped wheel in this embodiment.

[0026] Reference numerals: housing 1, input shaft 2, drive mechanism 3, first intermediate shaft 301, second intermediate shaft 302, first spiral bevel gear 303, second spiral bevel gear 304, first gear 305, second gear 306, third gear 307, tapered roller bearing 308, first mounting groove 309, deep groove ball bearing 310, second mounting groove 311, cylindrical roller bearing 312, third mounting groove 313, output shaft 4, shaft body 41, first shaft body section 411, second shaft body section 412, third shaft body section 413, fourth shaft body section 414, step 415, shaft end 42, T-shaped wheel 5, wheel body 51, baffle unit 52, L-shaped bracket 6, fourth mounting groove 7, damper 8, spring 9, oil seal spacer 10, sensor 11. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment: A walking drive device, as Figures 1 - 5 shown, includes a housing 1 made of QT400. The housing 1 is a square body structure with an open lower end. The housing 1 has an inner cavity. An input shaft 2, a drive mechanism 3, and an output shaft 4 are provided in the inner cavity of the housing 1. The output shaft 4 is located at one end of the housing 1, and its two ends are respectively rotatably connected to the two side walls of the housing 1. A T-shaped wheel 5 is installed in the middle of the output shaft 4. The input shaft 2 is located at the other end of the housing 1 and is perpendicular to the output shaft 4. One end of the input shaft 2 is connected to the drive mechanism 3, and the output shaft 4 is driven to rotate through the drive mechanism 3, so that the T-shaped wheel 5 moves along the track. The other end of the input shaft 2 penetrates the housing 1 and extends outside the housing 1. An L-shaped bracket 6 is also provided in the housing 1. The two ends of the L-shaped bracket 6 are respectively connected to the inner wall of the housing 1. The L-shaped bracket 6 is integrated with the housing 1. One end of the L-shaped bracket 6 is located on one side of the T-shaped wheel 5 and forms a support for the middle part of the output shaft 4.

[0029] During use, the other end of the input shaft 2 is connected to the output shaft 4 of the reducer by key connection. The input shaft 2 is driven to rotate, and the output shaft 4 is driven to rotate through the driving mechanism 3. The output shaft 4 rotates synchronously to drive the T-shaped wheel 5 to rotate, causing the T-shaped wheel 5 to move along the track, achieving the effect of moving the walking driving device. Among them, the T-shaped wheel 5 is located inside the box body 1, protected from sun and rain, achieving a certain anti-corrosion effect; and the output shaft 4 connected to the T-shaped wheel 5, due to being supported in multiple directions, improves the bending resistance and effectively increases the load capacity of the overhead crane.

[0030] Furthermore, the driving mechanism 3 includes a first intermediate shaft 301, a second intermediate shaft 302, a first spiral bevel gear 303, a second spiral bevel gear 304, a first gear 305, a second gear 306, and a third gear 307; among them, the first intermediate shaft 301, the second intermediate shaft 302, and the output shaft 4 are arranged in sequence and are parallel to each other. The second spiral bevel gear 304 and the first gear 305 are respectively installed at both ends of the first intermediate shaft 301. The first spiral bevel gear 303 is installed at one end of the input shaft 2 and meshes with the second spiral bevel gear 304. The second gear 306 is installed on the intermediate shaft and meshes with the first gear 305. The third gear 307 is installed at one end of the output shaft 4 and meshes with the second gear 306, that is, the first gear 305, the second gear 306, and the third gear 307 are meshed in sequence and are located on the same side.

[0031] During use, the input shaft 2 rotates and drives the first spiral bevel gear 303 to rotate. Since the first spiral bevel gear 303 and the second spiral bevel gear 304 are meshed, the first intermediate shaft 301 is synchronously driven to rotate. By using the transmission connection of the first gear 305, the second gear 306, and the third gear 307, the output shaft 4 rotates synchronously, and the T-shaped wheel 5 is driven to rotate through the output shaft 4.

[0032] Furthermore, as Figure 2 shown, tapered roller bearings 308 are installed at both ends of the input shaft 2, both ends of the first intermediate shaft 301, and both ends of the output shaft 4. The box body 1 is provided with a first installation groove 309 for installing the tapered roller bearings 308, that is, the tapered roller bearings 308 are respectively rotatably connected to both ends of the input shaft 2, both ends of the first intermediate shaft 301, and both ends of the output shaft 4, and the tapered roller bearings 308 are fixedly installed in the first installation groove 309; by setting the tapered roller bearings 308, using the radial load and single-direction axial load capabilities of the tapered roller bearings 308, the stability and radial load capacity during the rotation of the input shaft 2, the first intermediate shaft 301, and the output shaft 4 are improved.

[0033] Further, deep groove ball bearings 310 are installed at both ends of the second intermediate shaft 302, and second mounting grooves 311 for installing the deep groove ball bearings 310 are provided at one end of the housing 1 and the L-shaped bracket 6; by providing the deep groove ball bearings 310, the low friction resistance of the deep groove ball bearings 310 is utilized to enable more efficient transmission between the first gear 305, the second gear 306, and the third gear 307, reducing energy consumption.

[0034] As Figure 2 and Figure 3 shown, the output shaft 4 is made of 40Cr and includes a shaft body 41 and shaft ends 42 provided at both ends of the shaft body 41. The shaft body 41 and the shaft ends 42 are integrally formed, and the diameter of the shaft body 41 is greater than that of the shaft ends 42, that is, the shaft body 41 and the two shaft ends 42 are combined to form a structure that is thick in the middle and thin at both ends; by thickening the shaft body 41, the sectional moment of inertia is increased, the bending strength is enhanced, the bending stress in the middle region is reduced, and at the same time, the torsional section modulus is higher; by thinning the shaft ends 42, on the one hand, the redundant weight is reduced, the cost is lowered, and on the other hand, the rotational inertia is reduced, improving the smoothness of the output shaft 4 during rotation.

[0035] Further, the shaft body 41 adopts a multi-stage gradient structure, including a first shaft body section 411, a second shaft body section 412, a third shaft body section 413, and a fourth shaft body section 414 that are connected in sequence. The diameters of the first shaft body section 411, the second shaft body section 412, the third shaft body section 413, and the fourth shaft body section 414 gradually decrease in equal proportion, that is, the diameter ratio of the second shaft body section 412 to the first shaft body section 411, the diameter ratio of the third shaft body section 413 to the second shaft body section 412, and the diameter ratio of the fourth shaft body section 414 to the third shaft body section 413 are equal. At the same time, a step 415 is formed between adjacent shaft body sections; by dividing the shaft body 41 of the output shaft 4 into four shaft body sections with diameters gradually decreasing in equal proportion, first, the stress peak is dispersed through the smooth diameter change to avoid stress concentration, second, the natural frequency of the output shaft 4 is adjusted by changing the mass of each shaft body section to reduce vibration; third, the step 415 formed between adjacent shaft body sections obstructs the lubricating oil to prevent lubricating oil leakage, and at the same time, the step 415 is used to limit the components installed on the shaft body section.

[0036] The T-shaped wheel 5 is installed on the second shaft body section 412, and the outer side of the T-shaped wheel 5 abuts against the step 415 between the first shaft body section 411 and the second shaft body section 412, using this step 415 to limit the T-shaped wheel 5 and improving the smoothness of the T-shaped wheel 5 during operation.

[0037] A cylindrical roller bearing 312 is installed on the third shaft body section 413 of the output shaft 4. One end of the L-shaped bracket 6 is provided with a third mounting groove 313 for installing the cylindrical roller bearing 312. By arranging the cylindrical roller bearing 312 on one side of the T-shaped wheel 5, the middle part of the output shaft 4 is supported by using the radial load capacity of the cylindrical roller bearing 312, so as to reduce the load of the T-shaped wheel 5 on the output shaft 4 and improve the bending resistance of the output shaft 4, thereby improving the load capacity of the traveling drive device.

[0038] An oil seal spacer 10 is arranged between the cylindrical roller bearing 312 and the T-shaped wheel 5. The oil seal spacer 10 is installed on the second shaft body section 412, and its two ends respectively abut against the cylindrical roller bearing 312 and the T-shaped wheel 5. By arranging the oil seal spacer 10, on the one hand, it prevents the leakage of lubricating oil, and on the other hand, it prevents dust and impurities from entering and affecting the transmission between the first gear 305, the second gear 306 and the third gear 307, and the rotation of the tapered roller bearing 308.

[0039] Furthermore, as Figure 4 shown, the T-shaped wheel 5 includes a wheel body 51. A plurality of baffle units 52 are arranged on the outer side surface of the wheel body 51 along its circumferential direction. The baffle units 52 are fan-shaped, and the plurality of baffle units 52 are combined to form an annular baffle. The baffle units 52 have two states during use, namely: a separated state and an abutting state. A sensor 11 for obtaining the state change of the baffle unit 52 is installed on the baffle unit 52; specifically, the separated state is the state in which the baffle unit 52 forms a state separated from the wheel body 51 when it is subjected to an outward thrust, and the abutting state is the state in which the baffle unit 52 abuts against the wheel body 51 when it is not stressed and is subjected to an inward pulling force.

[0040] After the track is used for a long time, there is a situation of deformation. When the T-shaped wheel 5 moves to the deformed position, a jamming phenomenon will occur. By dividing the T-shaped wheel 5 into two parts, namely the wheel body 51 and the baffle, where the wheel body 51 is driven to move along the track, and the baffle is set to be dynamic while retaining the blocking effect. When the T-shaped wheel 5 moves to the deformed position of the track, the baffle unit 52 moves outward under force (i.e., the separated state) to cross the deformed position, thereby avoiding the jamming phenomenon. When the T-shaped wheel 5 crosses the deformed position, the baffle unit 52 returns to its original state (i.e., the abutting state). At the same time, the information about the deformation of the track can be obtained through the change of the state of the baffle unit 52, playing a certain warning effect. The sensor 11 is used to collect the information about the state change of the baffle unit 52 and transmit this information to the corresponding controller for reminder. The sensor 11 can adopt a displacement sensor 11, a force sensor 11, etc. By dividing the baffle into a plurality of baffle units 52, the weight of the baffle is shared, so as to facilitate an effective and timely response to the deformation of the track.

[0041] Specifically, as Figure 5As shown in the figure, a fourth installation groove 7 is formed at the outer side surface of the wheel body 51 corresponding to the three end corner positions of the baffle unit 52. A damper 8 is provided in the fourth installation groove 7. One end of the damper 8 is fixed to the bottom of the fourth installation groove 7, and the other end of the damper 8 is hinged to the baffle unit 52. A spring 9 is sleeved on the damper 8. One end of the spring 9 is fixed to the bottom of the fourth installation groove 7, and the other end of the spring 9 is fixed to the baffle unit 52.

[0042] When the T-shaped wheel 5 moves to the deformed position of the track, the baffle unit 52 in contact with the deformed position is pushed outwards, and a gap adapted to the deformed position of the track is formed between the baffle unit 52 and the wheel body 51, and the spring 9 is stretched; when the T-shaped wheel 5 crosses the deformed position of the track, the spring 9 contracts and acts on the baffle unit 52, pulling the baffle unit 52 inwards to restore its original state; by using the provided damper 8, the speed of the baffle unit 52 when pulling back inwards can be slowed down, avoiding direct impact of the baffle unit 52 on the wheel body 51 and causing damage. At the same time, the stroke of the baffle unit 52 can be limited by controlling the stroke of the damper 8 and the elastic force of the spring 9, avoiding the wheel body 51 from disengaging from the track.

[0043] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A travel drive device, comprising a housing (1), characterized in that: An input shaft (2), a driving mechanism (3) and an output shaft (4) are arranged in the inner cavity of the box (1); the output shaft (4) is located at one end of the box (1), and its two ends are rotatably connected to the two side walls of the box (1); a T-shaped wheel (5) is installed in the middle of the output shaft (4); the input shaft (2) is located at the other end of the box (1) and is arranged perpendicular to the output shaft (4); one end of the input shaft (2) is connected to the driving mechanism (3), and the output shaft (4) is driven to rotate by the driving mechanism (3), so that the T-shaped wheel (5) moves along the track; the other end of the input shaft (2) passes through the box (1) and extends to the outside of the box (1); an L-shaped bracket (6) is also arranged in the box (1); one end of the L-shaped bracket (6) is located on one side of the T-shaped wheel (5) and forms a support for the middle of the output shaft (4).

2. A travel drive device according to claim 1, characterized in that: The driving mechanism (3) comprises a first intermediate shaft (301), a second intermediate shaft (302), a first spiral bevel gear (303), a second spiral bevel gear (304), a first gear (305), a second gear (306) and a third gear (307); the first intermediate shaft (301), the second intermediate shaft (302) and the output shaft (4) are arranged in parallel; the second spiral bevel gear (304) and the first gear (305) are respectively mounted on two ends of the first intermediate shaft (301); the first spiral bevel gear (303) is mounted on one end of the input shaft (2) and meshes with the second spiral bevel gear (304); the second gear (306) is mounted on the second intermediate shaft (302) and meshes with the first gear (305); and the third gear (307) is mounted on one end of the output shaft (4) and meshes with the second gear (306).

3. A travel drive device according to claim 2, characterized in that: Tapered roller bearings (308) are installed at both ends of the input shaft (2), both ends of the first intermediate shaft (301) and both ends of the output shaft (4), and the housing (1) is provided with a first mounting groove (309) for mounting the tapered roller bearing (308).

4. A travel drive device according to claim 2, characterized in that: Deep groove ball bearings (310) are installed at both ends of the second intermediate shaft (302), and second installation grooves (311) for installing the deep groove ball bearings (310) are provided at one end of the housing (1) and the L-shaped bracket (6).

5. A travel drive device according to claim 1, characterized in that: The output shaft (4) comprises a shaft body (41) and shaft ends (42) arranged at both ends of the shaft body (41); the shaft body (41) is a multi-stage gradual structure, and the diameter of the shaft body (41) is greater than the diameter of the shaft end (42).

6. A travel drive device according to claim 5, characterized in that: The shaft body (41) of the output shaft (4) comprises a first shaft body section (411), a second shaft body section (412), a third shaft body section (413) and a fourth shaft body section (414) which are connected in sequence. The diameters of the first shaft body section (411), the second shaft body section (412), the third shaft body section (413) and the fourth shaft body section (414) are gradually reduced in proportion, and a step (415) is formed between two adjacent shaft body sections. The T-shaped wheel (5) is mounted on the second shaft body section (412), a cylindrical roller bearing (312) is mounted on the third shaft body section (413), an oil seal spacer (10) is provided between the cylindrical roller bearing (312) and the T-shaped wheel (5), and the oil seal spacer (10) is mounted on the second shaft body section (412), and two ends of the oil seal spacer (10) respectively abut against the cylindrical roller bearing (312) and the T-shaped wheel (5).

7. A travel drive device according to claim 1, characterized in that: A cylindrical roller bearing (312) is installed in the middle of the output shaft (4), and a third installation groove (313) for installing the cylindrical roller bearing (312) is opened at one end of the L-shaped bracket (6).

8. The travel drive device according to claim 1, characterized in that: The T-shaped wheel (5) comprises a wheel body (51), the outer side surface of the wheel body (51) is provided with a plurality of baffle units (52) along its circumference, the baffle units (52) are fan-shaped, and the plurality of baffle units (52) are combined to form an annular baffle, the baffle units (52) are in a detached state from the wheel body (51) when subjected to an outward thrust, and are in an abutting state against the wheel body (51) when the baffle units (52) are not subjected to a force and are subjected to an inward pulling force, and the baffle units (52) are installed with a sensor (11) for obtaining a change in the state of the baffle units (52).

9. A travel drive device according to claim 8, characterized in that: A fourth mounting groove (7) is provided on the outer surface of the wheel body (51) at three end angle positions corresponding to the baffle unit (52); a damper (8) is provided in the fourth mounting groove (7); one end of the damper (8) is fixed to the bottom of the fourth mounting groove (7); the other end of the damper (8) is hinged to the baffle unit (52); a spring (9) is sleeved on the damper (8); one end of the spring (9) is fixed to the bottom of the fourth mounting groove (7); the other end of the spring (9) is fixed to the baffle unit (52).

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