Speed reducer with brake mechanism

Abstract

The utility model relates to the technical field of speed reducers, and discloses a speed reducer with a brake mechanism, which comprises a speed reducer main body, a ratchet wheel is arranged on an output shaft of the speed reducer main body, the inclined plane orientation of ratchet teeth of the ratchet wheel is the same as the rotating direction of the output shaft, and a mounting plate is arranged in a shell of the speed reducer main body. A ratchet wheel is arranged on the mounting disc, a plurality of extrusion parts are uniformly arranged on the mounting disc, the extrusion parts can be extruded with the inclined surface of the ratchet wheel, a start-stop device is arranged on the mounting disc, the start-stop device is communicated with the extrusion parts, and the start-stop device controls the extrusion parts to be extruded with or separated from the ratchet wheel. And a slope extrusion type brake mechanism is arranged in the speed reducer main body, so that the brake effect and the abrasion loss are both considered.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of speed reducer, more specifically, it relates to a speed reducer with brake mechanism. BACKGROUND

[0002] Speed reducer is a kind of independent component by the gear transmission, worm drive, gear-worm drive in rigid shell, commonly used as the speed reducer transmission device between prime mover and working machine. To ensure normal transmission, brake mechanism is usually arranged on speed reducer.

[0003] At present, the brake mechanism commonly used in market is brake pad assembly, and braking is carried out by the friction between brake pad and wheel hub, but when brake mechanism is arranged on the outside of speed reducer, brake pad is easy to get dirty, and dust particles can aggravate the wear of brake pad during braking, and when brake mechanism is arranged on the inside of speed reducer, the lubricating oil splashed during the operation of speed reducer can easily enter between brake pad and wheel hub, thereby affecting the braking effect. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the utility model aims at providing a speed reducer with brake mechanism which takes into account the braking effect and wear amount.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme.

[0006] A speed reducer with brake mechanism, comprising a speed reducer main body, a ratchet wheel is installed on the output shaft of the speed reducer main body, the slope of the ratchet wheel ratchet is towards the same direction as the output shaft, an installation disc is arranged in the shell of the speed reducer main body, a plurality of extrusion pieces are uniformly installed on the installation disc, the extrusion pieces can be extruded with the slope of the ratchet wheel, a start-stop device is installed on the installation disc, the start-stop device is communicated with the extrusion pieces, and the start-stop device controls the extrusion pieces to extrude or separate from the ratchet wheel.

[0007] The utility model is further provided as follows: the extrusion piece comprises a containing groove, the containing groove is opened in the installation disc, an extrusion block is sealingly connected in the containing groove, the extrusion block can slide out of the containing groove along the radial direction of the installation disc, the end face of the extrusion block towards the side of the shaft center of the installation disc is inclined, and the inclined surface of the extrusion block can be attached to the slope of the ratchet wheel.

[0008] The present invention is further configured such that: the start-stop device includes an electromagnet, the electromagnet is mounted on the outer casing, the iron core of the electromagnet extends into the receiving groove, a passive iron core is provided on the pressing block, a spring is sleeved on one end of the electromagnet iron core extending into the receiving groove and the passive iron core, one end of the spring is fixed to the pressing block, and the other end of the spring is fixed to the bottom of the receiving groove, and when the iron core of the electromagnet and the passive iron core are attracted together, the pressing block is completely inside the receiving groove.

[0009] The present invention is further configured such that: two connecting pipes are connected to the receiving groove, the other end of the connecting pipes is connected to the oil sump of the reducer body, and a one-way valve and a solenoid valve are respectively installed on the two connecting pipes, with the flow direction of the one-way valve facing the receiving groove.

[0010] The present invention is further configured such that: the uppermost extrusion member is a suction member, which is connected to a second one-way valve; the lowermost extrusion member is a discharge member, which is connected to a solenoid valve; adjacent receiving slots are connected by a connecting slot, and a first one-way valve is provided on the connecting slot, wherein the flow direction of the first one-way valve is from the suction member to the discharge member.

[0011] The advantages of this utility model are:

[0012] A ratchet is mounted on the output shaft, and a mounting plate is correspondingly installed inside the housing. Several pressing components are evenly arranged on the mounting plate. The pressing components are controlled by a start / stop device. When braking is applied, the passive iron core disengages from the electromagnet, and the pressing block of the suction component is squeezed downward under the action of the spring, thereby drawing oil from the oil sump of the reducer body through one-way valve two. The inclined surface of the pressing block is in contact with the inclined surface of the ratchet. When the input shaft rotates, the ratchet pushes the pressing block of the suction component to slide repeatedly in the receiving groove. When the pressing block slides outward, the oil in the suction component is pumped into the lower receiving groove through one-way valve one until the oil is pumped into all the pressing components through the connecting groove. All the pressing components are squeezed against the ratchet, so that the ratchet drives the output shaft to brake. The braking mechanism is located inside the housing and is not affected by the lubricating oil, ensuring the braking effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of one embodiment of the present invention;

[0014] Figure 2 for Figure 1 The main view shown;

[0015] Figure 3 For along Figure 2 The BB line cross-section shown;

[0016] Figure 4 For along Figure 1The cross-sectional view along line AA is shown below;

[0017] In the diagram: 1. Reducer body; 11. Housing; 12. Output shaft; 2. Ratchet; 3. Mounting plate; 4. Extrusion component; 41. Receiving groove; 42. Extrusion block; 5. Connecting groove; 6. One-way valve I; 7. Start-stop device; 71. Electromagnet; 72. Spring; 73. Passive iron core; 74. One-way valve II; 75. Solenoid valve; 76. Connecting pipe. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art described in this application.

[0020] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0021] Please see Figures 1-3 The present invention provides the following technical solution:

[0022] A speed reducer with a braking mechanism includes a speed reducer body 1. A ratchet 2 is mounted on the output shaft 12 of the speed reducer body 1. The inclined surface of the ratchet teeth of the ratchet 2 faces the same direction as the rotation of the output shaft 12. A mounting plate 3 is provided inside the outer shell 11 of the speed reducer body 1. A plurality of pressing parts 4 are evenly mounted on the mounting plate 3. The pressing parts 4 can press against the inclined surface of the ratchet 2. A start-stop device 7 is mounted on the mounting plate 3. The start-stop device 7 is connected to the pressing parts 4 and controls the pressing parts 4 to press against or disengage from the ratchet 2.

[0023] The extrusion component 4 includes a receiving groove 41, which is opened in the mounting plate 3. An extrusion block 42 is sealed and connected in the receiving groove 41. The extrusion block 42 can slide out of the receiving groove 41 along the radial direction of the mounting plate 3. The end face of the extrusion block 42 facing the axis of the mounting plate 3 is inclined. The inclined surface of the extrusion block 42 can fit with the inclined surface of the ratchet 2.

[0024] The start / stop device 7 includes an electromagnet 71, which is mounted on the housing 11. The core of the electromagnet 71 extends into the receiving groove 41. A passive core 73 is provided on the pressing block 42. A spring 72 is sleeved on one end of the electromagnet 71 core extending into the receiving groove 41 and the passive core 73. One end of the spring 72 is fixed to the pressing block 42, and the other end of the spring 72 is fixed to the bottom of the receiving groove 41. When the core of the electromagnet 71 and the passive core 73 are attracted together, the pressing block 42 is completely inside the receiving groove 41.

[0025] Two connecting pipes 76 are connected to the receiving tank 41. The other end of the connecting pipe 76 is connected to the oil sump of the reducer body 1. A one-way valve 74 and a solenoid valve 75 are respectively installed on the two connecting pipes 76. The flow direction of the one-way valve 74 is towards the receiving tank 41.

[0026] The topmost extrusion piece 4 is the suction piece, which is connected to the one-way valve 74. The bottommost extrusion piece 4 is the discharge piece, which is connected to the solenoid valve 75. Adjacent accommodating slots 41 are connected by a connecting slot 5. A one-way valve 6 is provided on the connecting slot 5. The flow direction of the one-way valve 6 is from the suction piece to the discharge piece.

[0027] When braking, electromagnet 71 is closed, solenoid valve 75 is closed, passive iron core 73 is disengaged from electromagnet 71, and the squeezing block 42 of the suction component is squeezed out towards ratchet 2 under the action of spring 72. The volume of the receiving groove 41 of the suction component 42 increases, and oil is drawn from the oil pool through one-way valve 2 74. At the same time, ratchet 2 rotates with output shaft 12, and ratchet 2 pushes the squeezing block 42 of the suction component to move outward, thereby pumping out the oil in the receiving groove 41 of the suction component. The pumped oil is transported to the adjacent receiving groove 41 through one-way valve 6 on both sides, thereby pushing the corresponding squeezing block 42 to move towards one side of ratchet 2.

[0028] After the ratchet 2 passes the squeezing block 42 of the suction component, the squeezing block 42 is pushed out by the spring 72, thereby repeatedly sucking in oil from the oil pool. Before the braking is completed, the output shaft drives the ratchet 2 to rotate, so that the suction component repeatedly sucks in and pumps out oil until the oil enters all the receiving slots 41. At this time, all the squeezing blocks 42 are squeezed against the ratchet 2, so that the ratchet 2 stops, that is, the reducer body 1 achieves braking.

[0029] When the brake is released, the electromagnet 71 is attracted, the solenoid valve 75 is opened, and the oil in the receiving tank 41 can flow back into the oil pool through the solenoid valve 75. All the oil in the suction part is output, and the oil in the other extrusion parts 4 is squeezed out by the ratchet 2, so that all the extrusion blocks 42 are disengaged from the ratchet 2, and the ratchet 2 can rotate freely, thus realizing the release of the brake.

[0030] Specifically, a ratchet 2 is installed on the output shaft 12, and a mounting plate 3 is correspondingly provided inside the housing 11. Several pressing parts 4 are evenly arranged on the mounting plate 3. The pressing parts 4 are controlled by the start / stop device 7. When braking is applied, the passive iron core 73 is disengaged from the electromagnet 71, and the pressing block 42 of the suction part is squeezed downward under the action of the spring 72, thereby drawing oil from the oil pool of the reducer body 1 through the one-way valve 2 74. The inclined surface of the pressing block 42 is in contact with the inclined surface of the ratchet 2. When the input shaft rotates, the ratchet 2 pushes the pressing block 42 of the suction part to slide repeatedly in the receiving groove 41. When the pressing block 42 slides outward, the oil in the suction part is pumped into the lower receiving groove 41 through the one-way valve 6 until the oil is pumped into all the pressing parts 4 through the connecting groove 5. All the pressing parts 4 are squeezed with the ratchet 2, so that the ratchet 2 drives the output shaft to brake. The braking mechanism is located inside the housing 11 and is not affected by the lubricating oil, thus ensuring the braking effect.

[0031] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar counterparts and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A speed reducer with a braking mechanism, comprising a speed reducer body (1), characterized in that: A ratchet (2) is mounted on the output shaft (12) of the reducer body (1). The inclined surface of the ratchet (2) faces the same direction as the output shaft (12). A mounting plate (3) is provided inside the outer shell (11) of the reducer body (1). Several pressing parts (4) are evenly mounted on the mounting plate (3). The pressing parts (4) can press against the inclined surface of the ratchet (2). A start-stop device (7) is mounted on the mounting plate (3). The start-stop device (7) is connected to the pressing parts (4). The start-stop device (7) controls the pressing parts (4) to press against or disengage from the ratchet (2).

2. The speed reducer with braking mechanism according to claim 1, characterized in that: The extrusion component (4) includes a receiving groove (41) which is opened in the mounting plate (3). An extrusion block (42) is sealed and connected in the receiving groove (41). The extrusion block (42) can slide out of the receiving groove (41) along the radial direction of the mounting plate (3). The end face of the extrusion block (42) facing the axis of the mounting plate (3) is inclined. The inclined surface of the extrusion block (42) can fit against the inclined surface of the ratchet (2).

3. A speed reducer with a braking mechanism according to claim 2, characterized in that: The start / stop device (7) includes an electromagnet (71), which is mounted on the outer casing (11). The iron core of the electromagnet (71) extends into the receiving groove (41). A passive iron core (73) is provided on the pressing block (42). A spring (72) is sleeved on one end of the iron core of the electromagnet (71) extending into the receiving groove (41) and the passive iron core (73). One end of the spring (72) is fixed on the pressing block (42), and the other end of the spring (72) is fixed to the bottom of the receiving groove (41). When the iron core of the electromagnet (71) and the passive iron core (73) are attracted together, the pressing block (42) is completely inside the receiving groove (41).

4. A speed reducer with a braking mechanism according to claim 3, characterized in that: Two connecting pipes (76) are connected to the receiving groove (41). The other end of the connecting pipe (76) is connected to the oil sump of the reducer body (1). A one-way valve (74) and a solenoid valve (75) are respectively installed on the two connecting pipes (76). The flow direction of the one-way valve (74) is towards the receiving groove (41).

5. A speed reducer with a braking mechanism according to claim 4, characterized in that: The topmost extrusion member (4) is a suction member, which is connected to the second one-way valve (74). The bottommost extrusion member (4) is a discharge member, which is connected to the solenoid valve (75). Adjacent receiving slots (41) are connected by a connecting slot (5). A first one-way valve (6) is provided on the connecting slot (5). The flow direction of the first one-way valve (6) is from the suction member to the discharge member.

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