Travel drive reducer with integrated wheel side brake

Abstract

The present invention provides a travel drive reducer integrating wheel-side braking, which belongs to the technical field of shuttle car brake reducers, and includes a wheel hub, a first bevel gear, a first bevel gear shaft, a second bevel gear, a second bevel gear shaft, a sun gear shaft, a sun gear, a planetary gear, a planetary gear shaft, a planetary carrier, a first housing, a second housing, an inner gear ring, a static friction plate, a dynamic friction plate, a piston, a reset screw, a reset spring, an annular transition connecting plate and a limit steel plate. In the present invention, the planetary carrier and the transition connecting plate adopt a split design, which is convenient for the installation and maintenance of the wet brake part, and the friction plate can be replaced by only removing the tire and the transition connecting plate. When replacing the friction plate, there is no need to remove the entire planetary carrier and the planetary gear and other parts associated with the planetary carrier, which saves time and labor.

Description

Technical Field

[0001] The invention belongs to the technical field of shuttle car brake reducers, and specifically discloses a travel drive reducer integrating wheel side brakes. Background Art

[0002] The shuttle car is a trackless rubber-wheeled vehicle for short-distance and fast transportation in coal mines. As one of the important equipment for short-wall mechanized mining, its main function is to transfer coal from the continuous coal mining machine to the feed crusher. Patent No. ZL201510635944.0 discloses a heavy-duty shuttle wheel-side deceleration and braking system integrating differential transfer and wet braking. The wheel-side reducer of the system is provided with a wheel-side wet brake, integrating differential transfer and wet braking. However, the planetary carrier is directly connected to the housing of the wheel-side wet brake. When the friction plate is worn and needs to be replaced, the housing of the wheel-side wet brake, the entire planetary carrier, and the planetary wheels associated with the planetary carrier and other parts need to be removed, which is time-consuming and labor-intensive. Summary of the invention

[0003] The object of the present invention is to provide a travel drive reducer integrating wheel-side braking to improve the problems described in the background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides a travel drive reducer with integrated wheel-side braking, including a wheel hub, a first bevel gear, a first bevel gear shaft, a second bevel gear, a second bevel gear shaft, a sun gear shaft, a sun gear, a planetary gear, a planetary gear shaft, a planetary carrier, a first housing, a second housing, an inner gear ring, a static friction plate, a dynamic friction plate, a piston, a reset screw, a reset spring, an annular transition connecting plate and a limiting steel plate; the first bevel gear is located in the wheel hub, and the first bevel gear shaft is fixedly penetrated, the first bevel gear shaft is rotatably connected to the wheel hub, and both ends extend from the wheel hub and are connected to the transmission shaft; the second The bevel gear is located in the wheel hub and meshes vertically with the first bevel gear. A second bevel gear shaft is fixedly passed through the wheel hub. The second bevel gear shaft is rotatably connected to the wheel hub and connected to the sun gear shaft through a ball cage coupling. A sun gear is fixed on the sun gear shaft. The sun gear meshes with a plurality of planetary gears. The planetary gears rotate around the sun gear, and a planetary gear shaft is fixedly passed through the planetary gear. The planetary carrier includes a first frame body and a second frame body respectively fixedly connected to both ends of the planetary gear shaft. The first frame body is rotatably connected to the first housing. The first housing and two sets of connecting ear plates of the wheel hub are connected through joint bearings and pins. The second frame body is fixedly connected to the second housing. The first housing and the second housing are connected by a floating seal; the inner gear ring is meshed with the planetary gear and is fixedly arranged between the first housing and the second frame; the outer wall is provided with a static friction plate installation groove, in which a static friction plate is installed; the inner wall of the second housing is provided with a dynamic friction plate installation groove, in which a dynamic friction plate is installed; a plurality of static friction plates and dynamic friction plates are alternately arranged in sequence to form a friction pair, and the friction pair is filled with oil; the piston is slidingly arranged in a sealing cavity surrounded by the first housing, the floating seal and the friction pair; the reset screw slides through the piston, and the end is fixed on the first housing A return spring is sleeved between the nut and the piston; a hydraulic oil channel connected to the sealing cavity is arranged on the first outer shell, and a first end cover is arranged between the first outer shell and the ball cage coupling; a transition connecting plate surrounds the outer circumferential surface of the second frame, corresponding to the position of the friction pair, and the outer end surface of the transition connecting plate and the outer end surface of the second frame are connected by a round pin; a limiting steel sheet is arranged in a space enclosed by the friction pair, the second outer shell, the inner gear ring, the second frame and the transition connecting plate, the positioning pin passes through the transition connecting plate and the limiting steel sheet to be connected to the second outer shell, and the screw passes through the round pin and the transition connecting plate to press the limiting steel sheet.

[0005] Furthermore, a limiting ring is provided between the inner end surface of the transition connecting plate and the inner end surface of the second frame.

[0006] Furthermore, an O-ring is provided between the piston and the first housing to prevent leakage of hydraulic oil.

[0007] Furthermore, the static friction plate is installed in the static friction plate installation groove through a spline, and the dynamic friction plate is installed in the dynamic friction plate installation groove through a spline.

[0008] The present invention has the following beneficial effects:

[0009] The planetary carrier and transition plate adopt a split design, which is convenient for the installation and maintenance of the wet brake part. The friction plate can be replaced by removing only the tire and transition plate. When replacing the friction plate, there is no need to remove the entire planetary carrier and parts such as the planetary wheels associated with the planetary carrier, which saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is the appearance of the travel drive reducer with integrated wheel-side braking;

[0011] Figure 2 for Figure 1 A cross-sectional view of the travel drive reducer along the vertical center line is shown;

[0012] Figure 3 for Figure 1 A cross-sectional view of the travel drive reducer along the horizontal center line is shown;

[0013] Figure 4 for Figure 1 A partial enlarged view of the wet brake part in the travel drive reducer is shown.

[0014] The names corresponding to the reference numerals are:

[0015] 1-wheel hub; 1.1-wheel hub cover; 2-first bevel gear; 3-first bevel gear shaft; 4-second bevel gear; 5-second bevel gear shaft; 6-sun gear shaft; 7-sun gear; 8-planetary gear; 9-planetary gear shaft; 10.1-first frame; 10.2-second frame; 11-first housing; 11.1-hydraulic oil channel; 12-second housing; 13-inner gear ring; 14-static friction plate; 15-dynamic friction plate; 16-piston; 17-reset screw; 18-reset spring; 19-ball cage coupling; 20-spherical bearing; 21-pin shaft; 22-floating seal; 23-first end cover; 24-transition connecting plate; 25-limiting steel sheet; 26-round pin; 27-limiting ring; 28-locating pin; 29-screw; 30-O-ring; 31-second end cover; 32-drive shaft connecting flange. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The present embodiment provides a travel drive reducer with integrated wheel-side braking, including a wheel hub 1, a first bevel gear 2, a first bevel gear shaft 3, a second bevel gear 4, a second bevel gear shaft 5, a sun gear shaft 6, a sun gear 7, a planetary gear 8, a planetary gear shaft 9, a planetary carrier, a first housing 11, a second housing 12, an inner gear ring 13, a static friction plate 14, a dynamic friction plate 15, a piston 16, a reset screw 17, a reset spring 18, an annular transition connecting plate 24 and a limiting steel plate 25; the first bevel gear 2 is located in the wheel hub 1, and is fixedly penetrated by the first bevel gear shaft 3, the first bevel gear shaft 3 is rotatably connected to the wheel hub 1, and both ends extend from the wheel hub 1 and are connected to the transmission shaft; the second bevel gear 4 is located in the wheel hub 1, vertically meshed with the first bevel gear 2, and is fixedly penetrated by the first bevel gear shaft 3. The second bevel gear shaft 5 is rotatably connected to the wheel hub 1 and is connected to the sun gear shaft 6 through a ball cage coupling 19; a sun gear 7 is fixed on the sun gear shaft 6, the sun gear 7 is meshed with a plurality of planetary gears 8, the planetary gears 8 rotate around the sun gear 7, and a planetary gear shaft 9 is fixedly penetrated in the planetary gear 8; the planetary frame includes a first frame body 10.1 and a second frame body 10.2 fixedly connected to both ends of the planetary gear shaft 9 respectively, the first frame body 10.1 and the second frame body 10.2 are of integral design, the first frame body 10.1 is rotatably connected to the first housing 11, the first housing 11 and the two sets of connecting ear plates of the wheel hub 1 are connected through a spherical bearing 20 and a pin 21, the second frame body 10.2 is fixedly connected to the second housing 12, and the first housing 11 and the second housing 12 are connected. The inner gear ring 13 is meshed with the planetary gear 8 and is fixedly arranged between the first housing 11 and the second frame 10.2. The outer wall is provided with a static friction plate mounting groove, in which a static friction plate 14 is installed through a spline; the inner wall of the second housing 12 is provided with a dynamic friction plate mounting groove, in which a dynamic friction plate 15 is installed through a spline; a plurality of static friction plates 14 and dynamic friction plates 15 are alternately arranged in sequence to form a friction pair, and the friction pair is filled with oil; the piston 16 is slidably arranged in a sealed cavity surrounded by the first housing 11, the floating seal 22 and the friction pair; the reset screw 17 slides through the piston 16, and the end is fixed on the first housing 11, and a reset spring 18 is sleeved between the nut and the piston 16; the first housing 11 A hydraulic oil passage 11.1 connected to the sealing cavity is arranged on it, and a first end cover 23 is arranged between the first shell 11 and the ball cage coupling 19; a transition connecting plate 24 surrounds the outer circumferential surface of the second frame 10.2, and the outer end surface of the transition connecting plate 24 and the outer end surface of the second frame 10.2 are connected by a round pin 26, and a limiting ring 27 is arranged between the inner end surface of the transition connecting plate 24 and the inner end surface of the second frame 10.2; a limiting steel sheet 25 is arranged in a space enclosed by the friction pair, the second shell 12, the inner gear ring 13, the second frame 10.2 and the transition connecting plate 24, a locating pin 28 passes through the transition connecting plate 24 and the limiting steel sheet 25 to be connected to the second shell 12, and a screw 29 passes through the round pin 26 and the transition connecting plate 24 to press the limiting steel sheet 25.

[0018] The planetary carrier and the transition connecting plate 24 adopt a split design, which is convenient for the installation and maintenance of the wet brake part. The friction plate can be replaced by only removing the tire and the transition connecting plate 24. When replacing the friction plate, there is no need to remove the entire planetary carrier and parts such as the planetary wheels associated with the planetary carrier, which saves time and effort.

[0019] Furthermore, an O-ring 30 is provided between the piston 16 and the first housing 11 to prevent leakage of hydraulic oil. Furthermore, a second end cover 31 is provided on the outer end surface of the second housing 12, and the second frame 10.2, the transition connecting plate 24, the second housing 12, the first housing 11 and the first end cover 23 enclose the sun gear 7, the planetary gear 8 and the like.

[0020] Furthermore, the first bevel gear shaft 3 is rotatably connected to the wheel hub 1 through a bearing, and transmission shaft connecting flanges 32 for connecting to the transmission shaft are arranged at both ends; the second bevel gear shaft 5 is rotatably connected to the wheel hub 1 through a bearing, and the hub cover 1.1 is arranged outside the bearing; the first frame 10.1 is rotatably connected to the first shell 11 through a bearing.

[0021] The travel process of the above-mentioned travel drive reducer with integrated wheel-side braking is as follows: the motor drives the first bevel gear shaft 3 in the travel drive reducer with integrated wheel-side braking to rotate through the primary reducer and the transmission shaft, and after the first bevel gear 2 is reversed, the sun gear 7 is driven to rotate through the ball cage coupling 19, and the planetary gear 8 rotates around the sun gear 7, driving the planetary carrier to rotate, wherein the first frame 10.1 rotates in the first housing 11, the second frame 10.2 drives the second housing 12 to rotate, the dynamic friction plate 15 rotates relative to the static friction plate 14, and the tire is installed on the second housing 12. The braking process is as follows: the hydraulic system sends the hydraulic oil to the position of the piston 16 through the hydraulic oil channel 11.1, pushes the piston 16 to move toward the friction pair, squeezes the static friction plate 14 and the dynamic friction plate 15, and the friction force on the dynamic friction plate 15 gradually increases, and the rotation speed of the second housing 12 and the tire gradually decreases, achieving deceleration; the oil pressure continues to increase, the second housing 12 and the tire stop rotating, and braking is achieved; the brake is released, the hydraulic oil flows back to the hydraulic system, and the reset spring 18 pushes the piston 16 to reset.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A travel drive reducer integrating wheel-side braking, characterized in that: It includes a wheel hub, a first bevel gear, a first bevel gear shaft, a second bevel gear, a second bevel gear shaft, a sun gear shaft, a sun gear, a planetary gear, a planetary gear shaft, a planet carrier, a first housing, a second housing, an inner gear ring, a static friction plate, a dynamic friction plate, a piston, a reset screw, a reset spring, an annular transition connecting plate and a limit steel plate; The first bevel gear is located in the wheel hub, and a first bevel gear shaft is fixedly passed through the wheel hub. The first bevel gear shaft is rotatably connected to the wheel hub, and both ends of the first bevel gear shaft extend from the wheel hub and are connected to the transmission shaft. The second bevel gear is located in the wheel hub, vertically meshed with the first bevel gear, and a second bevel gear shaft is fixedly passed through the wheel hub. The second bevel gear shaft is rotatably connected to the wheel hub and connected to the sun gear shaft through a ball cage coupling. A sun gear is fixed on the sun gear shaft, the sun gear is meshed with a plurality of planetary gears, the planetary gears rotate around the sun gear, and a planetary gear shaft is fixedly inserted in the planetary gear; The planet carrier comprises a first frame body and a second frame body respectively fixedly connected to the two ends of the planetary wheel shaft, the first frame body is rotatably connected in the first shell, the first shell and two sets of connecting ear plates of the wheel hub are connected through joint bearings and pins, the second frame body is fixedly connected to the second shell, and the first shell and the second shell are connected through a floating seal; The inner gear ring is meshed with the planetary gear and is fixedly arranged between the first housing and the second frame. The outer wall is provided with a static friction plate installation groove, and a static friction plate is installed in the static friction plate installation groove; The inner wall of the second housing is provided with a dynamic friction plate installation groove, and the dynamic friction plate installation groove is installed with a dynamic friction plate; Multiple static friction plates and dynamic friction plates are alternately arranged in sequence to form a friction pair, and the friction pairs are filled with oil; The piston is slidably disposed in a sealing cavity surrounded by the first housing, the floating seal and the friction pair; The reset screw slides through the piston, and the end portion is fixed on the first housing, and a reset spring is sleeved between the nut and the piston; The first housing is provided with a hydraulic oil passage communicating with the sealing cavity, and a first end cover is provided between the first housing and the ball cage coupling; The transition connecting plate surrounds the outer circumferential surface of the second frame body, corresponding to the position of the friction pair, and the outer end surface of the transition connecting plate and the outer end surface of the second frame body are connected by a round pin; The limiting steel sheet is arranged in a space enclosed by the friction pair, the second outer shell, the inner gear ring, the second frame and the transition connecting plate. The positioning pin passes through the transition connecting plate and the limiting steel sheet to be connected to the second outer shell. The screw passes through the round pin and the transition connecting plate to press the limiting steel sheet.

2. The travel drive reducer with integrated wheel-side braking according to claim 1 is characterized in that: A limiting ring is arranged between the inner end surface of the transition connecting plate and the inner end surface of the second frame.

3. The travel drive reducer with integrated wheel-side braking according to claim 2 is characterized in that: An O-ring is arranged between the piston and the first housing to prevent leakage of hydraulic oil.

4. The travel drive reducer with integrated wheel-side braking according to claim 3 is characterized in that: A second end cover is arranged on the outer end surface of the second shell.

5. The travel drive reducer with integrated wheel-side braking according to claim 4 is characterized in that: The static friction plate is installed in the static friction plate installation groove through a spline, and the dynamic friction plate is installed in the dynamic friction plate installation groove through a spline.

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