Traction machine with an external traction wheel

Abstract

The present invention provides a traction machine with an external traction wheel, which has a high overall strength of the machine base, so that the deformation of the entire machine base is small during the operation of the traction machine, ensuring the smooth operation of the traction machine. It includes a machine base, a stator, a rotor, a traction wheel, a brake, and a rotating shaft. It is characterized in that: the inner cavity of the machine base is used to place the stator and the rotor, a first rotating shaft through hole is provided at the radial center of one end of the machine base, a motor ring cavity is formed by concave inward at one end of the radial outer side of the machine base, a box cover is installed on the end face of the radial outer ring of the machine base facing the traction wheel, and a second rotating shaft through hole is provided at the radial center of the box cover; the stator and the rotor are combined to form an electric component, and the output end of the rotor is sleeved on the rotating shaft; the rotating shaft is respectively supported by bearings in the first rotating shaft through hole and the second rotating shaft through hole, the rotating shaft passes through the second rotating shaft through hole and protrudes outward to form a traction wheel installation end, a traction wheel is fixedly sleeved on the traction wheel installation end, and a stator is fixedly sleeved on the radial inner ring wall of the motor ring cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of the structure of a traction machine, specifically a traction machine with an external traction wheel. Background Art

[0002] For the existing external traction wheel, the optimized structure is shown in Figure 1 , a rotating shaft through hole is provided at the axial center of the machine base, the rotating shaft is respectively supported on the rotating shaft through hole by bearings at both ends, both ends of the rotating shaft protrude laterally from the corresponding end faces of the base, an integrated structure of a rotor and a traction wheel is fixedly installed at one end of the rotating shaft, a brake is fixedly installed at the other end of the rotating shaft, the end face of the entire machine base facing the traction wheel is an open structure, the rigidity of the machine base for installing the traction wheel is insufficient, and further, the load-bearing strength of the machine base of the existing traction machine with an external traction wheel is insufficient. During the operation of the traction machine, the deformation strength of the machine base is large, and the running stability of the traction machine is relatively poor. Summary of the Invention

[0003] In view of the above problems, the present invention provides a traction machine with an external traction wheel, which has a high overall strength of the machine base, and further, during the operation of the traction machine, the deformation of the entire machine base is small, ensuring the running stability of the traction machine.

[0004] The traction machine with an external traction wheel has the following technical solution: it includes a machine base, a stator, a rotor, a traction wheel, a brake, and a rotating shaft. It is characterized in that:

[0005] The inner cavity of the machine base is used to place the stator and the rotor. A first rotating shaft through hole is provided at the radial center of one end of the machine base. An electric motor ring cavity is concavely formed at the outer end of the radial outside of the machine base. A box cover is installed on the end face of the radial outer ring of the machine base facing the traction wheel. A second rotating shaft through hole is provided at the radial center of the box cover;

[0006] The stator and the rotor are combined to form an electric machine component. The output end of the rotor is sleeved on the rotating shaft;

[0007] The rotating shaft is respectively supported on the first rotating shaft through hole and the second rotating shaft through hole by bearings. The rotating shaft passes through the second rotating shaft through hole and protrudes outward to form a traction wheel installation end. The traction wheel is fixedly sleeved on the traction wheel installation end. The stator is fixedly sleeved on the radial inner ring wall of the electric motor ring cavity;

[0008] The rotor specifically includes an annular rotor and a central connecting sleeve. The annular rotor is circumferentially distributed on the outer periphery of the stator. The outer end of the annular rotor facing the traction wheel is fixedly connected to the outer ring part of the central connecting sleeve. The central connecting sleeve is fixedly sleeved on the corresponding axial region of the rotating shaft. The axial position of the central connecting sleeve sleeved on the rotating shaft is between the first rotating shaft through hole and the second rotating shaft through hole.

[0009] It is further characterized in that:

[0010] On both sides of the center position at one end of the machine base, it is concave inward respectively. An encoder mounting cavity is formed on the outer side, and a connecting sleeve guiding and avoiding cavity is formed on the inner side. The encoder is fixedly connected to one end of the rotating shaft far from the traction wheel, and the encoder does not protrude beyond the outer end face of the machine base. The encoder is located in the encoder mounting cavity. The axial length of the part of the central connecting sleeve sleeved on the rotating shaft is greater than the thickness of the outer ring part, ensuring stable and reliable sleeve connection. The outer ring part includes a radially inner straight ring, an inclined ring, and a radially outer straight ring. The inclined ring is arranged to expand obliquely outward along the sleeve guiding and avoiding cavity. The outer end face of the radially outer straight ring is arranged parallel to the inner end face of the corresponding area of the box cover, ensuring the compactness and reliability of the whole structure;

[0011] Brakes are fixedly installed on both sides of the machine base respectively. The brake is specifically an electromagnetic brake. The brake pads of the electromagnetic brake penetrate through the corresponding machine base shell and are arranged towards the outer wall of the rotating ring-shaped rotor, which reduces the axial dimension of the whole machine base and is convenient for the assembly of the whole traction machine;

[0012] One end of the rotating shaft where the traction wheel is installed is a tapered structure that tapers from the inside to the outside. The sleeved hole of the traction wheel is fixedly sleeved on the traction wheel installation end of the rotating shaft and is fixedly equipped with a locking end cover, ensuring stable and reliable installation of the traction wheel;

[0013] A wiring seat is arranged on the top of the machine base to ensure convenient and reliable wiring;

[0014] A first bearing is arranged in the first rotating shaft through hole, and a second bearing is arranged in the second rotating shaft installation hole. A first stop boss is arranged at the inner side position of the rotating shaft corresponding to the first bearing, and a second stop boss is arranged at the inner side position of the rotating shaft corresponding to the second bearing, ensuring stable and reliable axial installation positions of the first bearing and the second bearing;

[0015] A bearing pressing plate is fixedly installed at the center position on the inner side of the box cover. Bolt connection holes are annularly distributed around the outer circumference of the second rotating shaft through hole of the box cover. After the second bearing is arranged in the second rotating shaft through hole, bolts penetrate through the bolt connection holes and are fixedly connected to the radially outer end position of the bearing pressing plate. The inner side of the bearing pressing plate protrudes and presses against the outer ring of the second bearing. A through hole is arranged at the center position of the bearing pressing plate to facilitate the passing of the rotating shaft, ensuring stable and reliable position of the second bearing;

[0016] Weight reduction slot holes are annularly distributed in the area of the box cover corresponding to the traction wheel. The weight reduction slot holes ensure heat dissipation of the whole machine and relatively light weight of the whole machine;

[0017] Pull ring holes are respectively arranged on both sides of the upper part of the machine base to facilitate the hoisting of the whole structure;

[0018] Fixing holes are respectively arranged on both sides of the bottom of the machine base, facilitating the fixed installation of the entire structure.

[0019] After adopting the above technical solution, a box cover is installed on the end face of the machine base facing the traction wheel, which enables a reinforcing end plate structure to be encapsulated on the outer periphery of the motor installation cavity formed by the combination of the stator and the rotor. The edge of the machine base is tightly limited by the box cover, which makes the overall strength of the machine base high, and further makes the deformation of the entire machine base small during the operation of the traction machine, ensuring the smooth operation of the traction machine. Description of the Drawings

[0020] Figure 1 It is a schematic cross-sectional view structure diagram of an existing traction machine;

[0021] Figure 2 It is a schematic perspective view structure diagram of the present invention;

[0022] Figure 3 It is a schematic rear view structure diagram of the present invention;

[0023] Figure 4 It is a schematic cross-sectional view structure diagram of the present invention;

[0024] The names corresponding to the serial numbers in the figure are as follows:

[0025] Machine base 1, first rotating shaft through hole 11, motor ring cavity 12, radial outer ring 13, encoder installation cavity 14, connecting sleeve guiding and avoiding cavity 15, wiring seat 16, first bearing 17, first stop boss 18, fixing hole 19, pull ring hole 20, stator 2, rotor 3, annular rotor 31, central connecting sleeve 32, outer ring part 321, radially inner straight ring 322, inclined ring 323, radially outer straight ring 324, traction wheel 4, brake 5, rotating shaft 6, traction wheel installation end 61, second stop boss 62, box cover 7, second rotating shaft through hole 71, second bearing 72, bearing pressing plate 73, bolt 74, through hole 75, weight reducing slot hole 76, encoder 8, locking end cover 9. Detailed Description of the Invention

[0026] The traction machine with an external traction wheel is shown in Figures 2 - 4 , which includes a machine base 1, a stator 2, a rotor 3, a traction wheel 4, a brake 5, and a rotating shaft 6. The inner cavity of the machine base 1 is used to place the stator 2 and the rotor 3. A first rotating shaft through hole 11 is arranged at the radial center of one end of the machine base 1. A motor ring cavity 12 is formed by concave inward at one end of the radial outer side of the machine base 1. A box cover 7 is installed on the end face of the radial outer ring 13 of the machine base 1 facing the traction wheel 4. A second rotating shaft through hole 71 is arranged at the radial center of the box cover 7;

[0027] The stator 2 and the rotor 3 are combined to form an electric machine component, and the output end of the rotor 3 is sleeved on the rotating shaft 6;

[0028] The rotating shaft 6 is respectively supported by bearings in the first rotating shaft through hole 11 and the second rotating shaft through hole 71. The rotating shaft 6 passes through the second rotating shaft through hole 71 and protrudes outward to form a traction wheel mounting end 61. A traction wheel 4 is fixedly sleeved on the traction wheel mounting end 61. A stator 2 is fixedly sleeved on the radial inner wall of the motor annular cavity 12;

[0029] The rotor 3 specifically includes an annular rotor 31 and a central connecting sleeve 32. The annular rotor 31 is annularly distributed on the outer periphery of the stator 2. The outer end of the annular rotor 31 facing the traction wheel 4 is fixedly connected to the outer ring part 321 of the central connecting sleeve 32. The central connecting sleeve 32 is fixedly sleeved on the corresponding axial region of the rotating shaft 6. The axial position where the central connecting sleeve 32 is fixedly sleeved on the rotating shaft 6 is between the first rotating shaft through hole 11 and the second rotating shaft through hole 71.

[0030] During specific implementation, see Figures 2 - 4 : Both sides of the center position at one end of the machine base 1 are recessed inward. An encoder mounting cavity 14 is formed on the outside and a connecting sleeve guiding and avoiding cavity 15 is formed on the inside. The encoder 8 is fixedly connected to the end of the rotating shaft 6 far from the traction wheel 4 and does not protrude beyond the outer end face of the machine base 1. The encoder 8 is located in the encoder mounting cavity 14. The axial length of the part of the central connecting sleeve 32 sleeved on the rotating shaft 6 is greater than the thickness of the outer ring part 321 to ensure stable and reliable sleeved connection. The outer ring part 321 includes a radially inner straight ring 322, an inclined ring 323, and a radially outer straight ring 324. The inclined ring 323 is arranged to expand obliquely outward along the sleeve guiding and avoiding cavity 15. The outer end face of the radially outer straight ring 324 is arranged parallel to the inner end face of the corresponding area of the box cover 7 to ensure the compactness and reliability of the whole structure;

[0031] Brakes 5 are fixedly installed on both sides of the machine base 1. The brakes 5 are specifically electromagnetic brakes. The brake pads of the brakes 5 pass through the corresponding housing of the machine base 1 and are arranged towards the outer wall of the annular rotor 31, which reduces the axial dimension of the whole machine base 1 and is convenient for the assembly of the whole traction machine;

[0032] One end of the rotating shaft 6 where the traction wheel 4 is installed is a tapered structure that tapers from the inside to the outside. The sleeve hole of the traction wheel 4 is fixedly sleeved on the traction wheel mounting end 61 of the rotating shaft 6 and a locking end cover 9 is fixedly installed to ensure the stable and reliable installation of the traction wheel 4;

[0033] A wiring seat 16 is arranged on the top of the machine base 1 to ensure convenient and reliable wiring;

[0034] A first bearing 17 is arranged inside the first rotating shaft through hole 11, and a second bearing 72 is arranged inside the second rotating shaft mounting hole 71. A first stop boss 18 is arranged at the inner side position of the rotating shaft 6 corresponding to the first bearing 17, and a second stop boss 62 is arranged at the inner side position of the rotating shaft 6 corresponding to the second bearing 72, ensuring the stable and reliable axial mounting positions of the first bearing 17 and the second bearing 72;

[0035] A bearing pressing plate 73 is fixedly arranged at the center position on the inner side of the box cover 7. Bolt connection holes are annularly distributed on the outer circumference of the box cover 7 around the second rotating shaft through hole 71. After the second bearing 72 is arranged in the second rotating shaft through hole 71, a bolt 74 passes through the bolt connection hole and is fixedly connected to the radially outer end position of the bearing pressing plate 73. The inner side convex 731 of the bearing pressing plate 73 presses against the outer ring of the second bearing 72. A through hole 75 is arranged at the center position of the bearing pressing plate 73 to facilitate the passing of the rotating shaft 6, ensuring the stable and reliable position of the second bearing 72;

[0036] Weight reducing slot holes 76 are annularly distributed in the area of the box cover 7 corresponding to the traction wheel 4. The weight reducing slot holes 76 ensure the heat dissipation of the whole machine and relatively light weight of the whole machine;

[0037] Pull ring holes 20 are respectively arranged on both sides of the upper part of the machine base 1, facilitating the hoisting of the whole structure;

[0038] Fixing holes 19 are respectively arranged on both sides of the bottom of the machine base 1, facilitating the fixed installation of the whole structure.

[0039] The working principle is as follows: The end face of the machine base facing the traction wheel is covered with a box cover, which enables the outer circumference of the motor installation cavity formed by the combination of the stator and the rotor to be encapsulated with a strengthened end plate structure. The edge of the machine base is tightly limited by the box cover, making the overall strength of the machine base high. Furthermore, when the traction machine is running, the deformation of the whole machine base is small, ensuring the smooth operation of the traction machine; Electromagnetic brakes are respectively arranged on both sides of the machine base, and the two electromagnetic brakes perform braking actions synchronously, ensuring that the axial volume of the whole structure is small and ensuring the stable and reliable braking.

[0040] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0041] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A traction machine with an external traction wheel, which comprises a machine base, a stator, a rotor, a traction wheel, a brake, and a rotating shaft. It is characterized in that: The inner cavity of the machine base is used to place the stator and the rotor. A first rotating shaft through hole is arranged at the radial center of one end of the machine base. An electric motor ring cavity is formed by inward concavity at one end of the radial outer side of the machine base. A box cover is installed on the end face of the radial outer ring of the machine base facing the traction wheel. A second rotating shaft through hole is arranged at the radial center of the box cover; The stator and the rotor are combined to form an electric machine component, and the output end of the rotor is sleeved on the rotating shaft; The rotating shaft is respectively supported by bearings in the first rotating shaft through hole and the second rotating shaft through hole. The rotating shaft passes through the second rotating shaft through hole and protrudes outward to form a traction wheel installation end. The traction wheel is fixedly sleeved on the traction wheel installation end. The stator is fixedly sleeved on the radial inner ring wall of the electric motor ring cavity; The rotor specifically includes an annular rotor and a central connection sleeve. The annular rotor is distributed around the outer circumference of the stator. The outer end of the annular rotor facing the traction wheel is fixedly connected to the outer ring part of the central connection sleeve. The central connection sleeve is fixedly sleeved on the corresponding axial region of the rotating shaft. The axial position where the central connection sleeve is sleeved on the rotating shaft is between the first rotating shaft through hole and the second rotating shaft through hole; On both sides of the center position of one end of the machine base, inward concavities are respectively formed. An encoder installation cavity is formed on the outside, and a connection sleeve guiding and avoiding cavity is formed on the inside. The encoder is fixedly connected to the end of the rotating shaft away from the traction wheel, and the encoder does not protrude beyond the outer end face of the machine base. The encoder is located in the encoder installation cavity. The axial length of the part of the central connection sleeve sleeved on the rotating shaft is greater than the thickness of the outer ring part, ensuring a stable and reliable sleeve connection. The outer ring part includes a radially inner straight ring, an inclined ring, and a radially outer straight ring. The inclined ring is arranged to expand obliquely outward along the sleeve guiding and avoiding cavity. The outer end face of the radially outer straight ring is arranged parallel to the inner end face of the corresponding area of the box cover; A first bearing is arranged in the first rotating shaft through hole, and a second bearing is arranged in the second rotating shaft installation hole. A first stop boss is arranged at the inner side position of the rotating shaft corresponding to the first bearing, and a second stop boss is arranged at the inner side position of the rotating shaft corresponding to the second bearing.

2. The traction machine with an external traction wheel according to claim 1, characterized in that: Brakes are fixedly installed on both sides of the machine base. The brake is specifically an electromagnetic brake. The brake pads of the electromagnetic brake penetrate through the corresponding machine base shell and face the outer wall of the annular rotor.

3. The traction machine with an external traction wheel according to claim 1, characterized in that: The end of the rotating shaft where the traction wheel is installed is a tapered structure that tapers from the inside to the outside. The sleeve hole of the traction wheel is fixedly sleeved on the traction wheel installation end of the rotating shaft, and a locking end cover is fixedly installed.

4. The traction machine with an external traction wheel according to claim 1, characterized in that: A wiring seat is arranged on the top of the machine base.

5. The traction machine with an external traction wheel according to claim 1, characterized in that: A bearing pressure plate is fixedly installed at the center position on the inner side of the box cover. Bolt connection holes are annularly distributed around the outer circumference of the second rotating shaft through hole on the box cover. After the second bearing is arranged in the second rotating shaft through hole, a bolt passes through the bolt connection hole and is fixedly connected to the radially outer end position of the bearing pressure plate. The inner side of the bearing pressure plate is convexly pressed against the outer ring of the second bearing, and a through hole is arranged at the center position of the bearing pressure plate.

6. The traction machine with an external traction wheel according to claim 1, characterized in that: Weight reduction slot holes are annularly distributed in the area of the box cover corresponding to the traction wheel.

7. The traction machine with an external traction wheel according to claim 1, characterized in that: Pull ring holes are respectively arranged on both sides of the upper part of the machine base.

8. The traction machine with an external traction wheel according to claim 1, characterized in that: Fixing holes are respectively arranged on both sides of the bottom of the machine base.

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