A DC motor electric commutation device for mining

Abstract

The present invention discloses a mine-used DC motor electric commutation device, comprising: a commutation member rotatable along its own axis; an axial copper bushing (9) and a circumferential copper bushing (10), which are symmetrically arranged on the outer side of the commutation member along the central axis of the commutation member; a plurality of finger contacts (1), the contacts of which can intermittently contact the circumferential copper bushing (10) and the axial copper bushing (9) when the commutation member rotates; a driving assembly for driving the commutation member to rotate; a cam (13) that rotates together with the commutation member is further arranged on the commutation member, a first switch (11) and a second switch (12) for controlling the on-off of the current of the finger contacts (1) are symmetrically arranged on the left and right sides of the cam (13), and the cam (13) abuts against the first switch (11) and the second switch (12).

Description

Technical Field

[0001] The present invention belongs to the field of motor equipment, and more specifically, it is a mine-used DC motor electric commutation device. Background Art

[0002] There are two traditional commutation technologies for mine-used DC motors. One is the manual commutation technology of a commutation hub, and the other is the electric commutation technology of a DC contactor. The advantage of the manual commutation of the commutation hub is that it has a simple structure, reliable commutation, and low cost. In the power-off state, it can also maintain operation. Its defect is that it cannot be remotely controlled. The advantage of the electric commutation of the DC contactor is that it can be remotely controlled. Its defect is that it has a complex structure, large volume, and high cost. If a power-off phenomenon occurs, the entire system will not be able to work, which is very unreliable. At the same time, during commutation, the current of many DC motor commutation devices has been maintained in the energized state. Since the energized current of mine-used DC motors is large during operation, it is not only not conducive to the safety of the working state, but also causes material wear and wastes energy. Summary of the Invention

[0003] In view of the above technical problems, the present invention aims to provide a mine-used DC motor commutation device that can reliably maintain motor commutation under power-off and can achieve remote control. At the same time, when the device is in the commutation working state, the current is disconnected, and the current is reconnected after the commutation ends, ensuring the safety of the working state. It includes:

[0004] A mine-used DC motor electric commutation device, characterized by including:

[0005] A commutation member that can rotate around its own axis;

[0006] At least two first conduction members and at least two second conduction members, the first conduction members and the second conduction members are respectively arranged on the circumferential surface of the commutation member along a first direction and a second direction;

[0007] At least four finger-shaped contacts, which are symmetrically arranged in pairs on the left and right. The contacts of the finger-shaped contacts are all abutted against the commutation member and intermittently contact the first conduction member or the second conduction member when the commutation member rotates;

[0008] A driving assembly for driving the commutation member to rotate;

[0009] A cam, which is synchronously rotated with the commutation member, and a first switch and a second switch are also arranged beside the cam;

[0010] The mine-used DC motor electric commutation device includes at least three working states, including:

[0011] Commutation power-off state, at this time, the protruding part of the cam does not abut against the first switch and the second switch, and the contacts of the finger-shaped contacts are all disengaged from the first conduction member or the second conduction member;

[0012] First conduction state, at this time, the protruding part of the cam only abuts against the first switch, the contacts of the two left finger-shaped contacts are connected through one first conduction member, and the contacts of the two right finger-shaped contacts are connected through another first conduction member;

[0013] Second conduction state, at this time, the protruding part of the cam only abuts against the second switch, and the contacts of the left and right finger-shaped contacts are connected through two second conduction members.

[0014] Furthermore, the commutation member is a cylindrical commutation hub.

[0015] Furthermore, the first direction is the axial direction of the commutation hub, and the second direction is the circumferential direction of the commutation hub.

[0016] Furthermore, the first conduction member is an axial copper bushing, and the second conduction member is a circumferential copper bushing.

[0017] Furthermore, the axial copper bushings are arranged at intervals in the circumferential direction, and the circumferential copper bushings are arranged at intervals in the axial direction.

[0018] Furthermore, it includes eight finger-shaped contacts, four axial copper bushings and four circumferential copper bushings. The eight finger-shaped contacts are symmetrically distributed on the left and right on one side and arranged axially. The four axial copper bushings are symmetrically arranged in two groups on the left and right.

[0019] Furthermore, it further includes a first L-shaped plate, a second L-shaped plate symmetrically arranged above and below the first L-shaped plate, and a connecting plate connecting the first L-shaped plate and the second L-shaped plate. A commutation drum shaft for driving its rotation is penetrated through the central axis of the commutation hub. One end of it penetrates through the first L-shaped plate and is connected to the drive assembly, and the other end penetrates through the second L-shaped plate and is connected to the cam. A copper bushing is sleeved at the through hole of the first L-shaped plate and the second L-shaped plate where the commutation drum shaft is located.

[0020] Furthermore, the drive assembly includes a torque motor and a motor shaft sleeve sleeved on the output end of the torque motor. A shaft pin is arranged on the motor shaft sleeve. A commutation wheel shaft sleeve is sleeved on the end of the commutation drum shaft close to the drive assembly. A plurality of shaft pin holes corresponding to the shaft pins are arranged on one side of the commutation wheel shaft sleeve close to the motor shaft sleeve. The motor shaft sleeve is inserted into the commutation wheel shaft sleeve through the cooperation between the shaft pin and the shaft pin hole.

[0021] Further, a commutation module for processing remote signals is also installed on the second L-shaped plate.

[0022] Compared with the prior art, a mine-used DC motor electric commutation device proposed by the present invention has the following advantages:

[0023] 1. Through the cooperation among the circumferential copper segment, the axial copper segment and the eight finger-shaped contacts, periodic commutation of the motor is achieved. This device can not only control the commutation of 2 mine-used DC motors simultaneously, but also control the commutation of 1 mine-used DC motor with double power by respectively connecting 2 circumferential conductive copper blocks and 2 axial conductive copper blocks in parallel to adapt to the commutation of high-power DC motors;

[0024] 2. Through the design of the cam, the first switch and the second switch, when the device is in the commutation power-off state, no current passes through the finger-shaped contacts, ensuring the safety of the device during use and saving energy at the same time;

[0025] 3. A commutation module for processing remote signals is designed, enabling the device to maintain motor commutation through an independent motor or manual force under power failure and also enabling remote control. Description of the Drawings

[0026] Figure 1 is the front view of the present invention;

[0027] Figure 2 is the side sectional view of the present invention;

[0028] Figure 3 is the partial disassembled view of the driving component of the present invention;

[0029] Figure 4 is the three-dimensional schematic diagram of the present invention in the commutation power-off state;

[0030] Figure 5 is the position schematic diagram of the cam of the present invention in the commutation power-off state;

[0031] Figure 6 is the three-dimensional schematic diagram of the present invention in the second conduction state;

[0032] Figure 7 is the cam position schematic diagram of the present invention in the second conduction state;

[0033] Figure 8 is the three-dimensional schematic diagram of the present invention when the finger type is in the first conduction state;

[0034] Figure 9 is the cam position schematic diagram of the present invention in the first conduction state;

[0035] The markings in the figures are explained as follows:

[0036] 1 - Finger contact; 2 - Torque motor; 3 - Motor shaft sleeve; 4 - Commutator wheel shaft sleeve; 5 - Axle nail; 6 - Axle nail hole; 7 - Commutator drum shaft hole; 8 - Commutator hub; 9 - Axial copper bushing; 10 - Circumferential copper bushing; 11 - First switch; 12 - Second switch; 13 - Cam; 14 - Commutator drum shaft; 15 - First L-shaped plate; 16 - Second L-shaped plate; 17 - Connecting plate; 18 - Copper shaft sleeve; 19 - Commutation module. Specific embodiments

[0037] The present invention will be further described below with reference to the accompanying drawings.

[0038] Refer to Figures 1-9 , a mine-used DC motor electric commutation device, comprising a commutation member that can rotate around its own axis; at least two first conduction members and at least two second conduction members, the first conduction members and the second conduction members are respectively arranged on the circumferential surface of the commutation member along a first direction and a second direction; at least four finger contacts 1, which are symmetrically arranged in pairs left and right, the contacts of the finger contacts 1 are all abutted on the commutation member, and intermittently contact the first conduction member or the second conduction member when the commutation member rotates; a driving assembly for driving the commutation member to rotate; a cam 13, which is synchronously rotated with the commutation member, and a first switch 11 and a second switch 12 that cooperate with the cam 13 are also arranged beside the cam 13; the mine-used DC motor electric commutation device includes at least three working states, including: a commutation power-off state, at this time the protruding part of the cam 13 does not abut against the first switch 11 and the second switch 12, and the contacts of the finger contacts 1 are all disengaged from the first conduction member or the second conduction member; a first conduction state, at this time the protruding part of the cam 13 only abuts against the first switch 11, the contacts of the two left finger contacts 1 are connected through one of the first conduction members, and the contacts of the two right finger contacts 1 are connected through another first conduction member; a second conduction state, at this time the protruding part of the cam 13 only abuts against the second switch 12, and the contacts of the left and right finger contacts 1 are connected through the two second conduction members.

[0039] In this embodiment, the commutation member is a cylindrical commutation hub 8. In other embodiments, other forms of commutation members such as conical commutation members and cuboid commutation members can also be used.

[0040] In this embodiment, eight of the finger contacts (1), four of the axial copper bushes (9), and four of the circumferential copper bushes (10) are provided. Every four of the eight finger contacts (1) form a group, and the two groups of finger contacts (1) are symmetrically arranged on both sides of the axis of the commutation member. The four axial copper bushes (9) are arranged in pairs, and each pair of axial copper bushes (9) is arranged along the axis of the commutation member. From the above description, it can be seen that the first switch 11 and the second switch 12 are opened and closed as the cam 13 rotates to the corresponding positions, ensuring zero current during the commutation switching operation. When the finger contact 1 contacts the copper bush, the switch is pressed to connect the current. By contacting the finger contact 1 with different copper bushes, the direction of the current is changed to achieve commutation of the DC motor. At the same time, this device can either control the commutation of 2 mine-used DC motors simultaneously or control the commutation of 1 mine-used DC motor with double power by connecting 2 circumferential copper bushes 10 and 2 axial copper bushes 9 in parallel respectively to adapt to the commutation of high-power DC motors. In this embodiment, the pressure of the finger contact 1 on the copper bush is greater than 5KG to ensure good contact.

[0041] In this embodiment, it further includes a first L-shaped plate 15, a second L-shaped plate 16 symmetrically arranged above and below the first L-shaped plate 15, and a connecting plate 17 connecting the first L-shaped plate 15 and the second L-shaped plate 16. A commutation drum shaft 14 for driving its rotation is penetrated through the central axis of the commutation hub 8. One end of it penetrates through the first L-shaped plate 15 and is connected to the driving assembly, and the other end penetrates through the second L-shaped plate 16 and is connected to the cam 13. A copper bushing 18 is sleeved on the commutation drum shaft 14 at the through holes of the first L-shaped plate 16 and the second L-shaped plate 16.

[0042] In this embodiment, the driving assembly includes a torque motor 2 and a motor shaft sleeve 3 sleeved on the output end of the torque motor 2. Four shaft nails 5 are arranged on the motor shaft sleeve 3. A commutation wheel shaft sleeve 4 is sleeved on the end of the commutation drum shaft 14 close to the driving assembly. Four shaft nail holes 6 corresponding to the four shaft nails 5 are arranged on one side of the commutation wheel shaft sleeve 4 close to the motor shaft sleeve 3. The motor shaft sleeve 3 is inserted into the commutation wheel shaft sleeve 4 through the cooperation between the shaft nails 5 and the shaft nail holes 6.

[0043] In this embodiment, both the first switch 11 and the second switch 12 are arranged on the side of the second L-shaped plate 16 where the cam 13 is provided.

[0044] In this embodiment, a commutation module 19 for processing remote signals is further installed on the second L-shaped plate 16. The commutation module 19 can work through a remote control signal, so as to realize the commutation action of the battery locomotive remotely. Its technical features are well-known prior art to those skilled in the communication field and are not the main innovation points of the present invention. Therefore, they will not be elaborated in detail here.

[0045] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly. It should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A DC motor electric commutation device for mining, characterized in that, it includes: a commutation member that can rotate around its own axis; at least two first conduction members and at least two second conduction members, the first conduction members and the second conduction members are respectively arranged on the circumferential surface of the commutation member along the first direction and the second direction; at least four finger contacts (1), which are symmetrically arranged in pairs on the left and right, the contacts of the finger contacts (1) are all abutted on the commutation member, and intermittently contact the first conduction member or the second conduction member when the commutation member rotates; a driving assembly for driving the commutation member to rotate; a cam (13), which is synchronously rotated with the commutation member, and a first switch (11) and a second switch (12) that cooperate with the cam (13) are also arranged beside the cam (13); the DC motor electric commutation device for mining has at least three working states, including: a commutation power-off state, at this time the protruding part of the cam (13) does not abut against the first switch (11) and the second switch (12), and the contacts of the finger contacts (1) are all disengaged from the first conduction member or the second conduction member; a first conduction state, at this time the protruding part of the cam (13) only abuts against the first switch (11), the contacts of the two finger contacts (1) on the left are connected through one first conduction member, and the contacts of the two finger contacts (1) on the right are connected through another first conduction member; a second conduction state, at this time the protruding part of the cam (13) only abuts against the second switch (12), and the contacts of the finger contacts (1) on the left and right are connected through two second conduction members.

2. The DC motor electric commutation device for mining according to claim 1, characterized in that, the commutation member is a cylindrical commutation hub (8).

3. The DC motor electric commutation device for mining according to claim 2, characterized in that, the first direction is the axial direction of the commutation hub (8), and the second direction is the circumferential direction of the commutation hub (8).

4. The DC motor electric commutation device for mining according to claim 1, characterized in that, the first conduction member is an axial copper bushing (9), the second conduction member is a circumferential copper bushing (10), the axial copper bushings (9) are arranged at intervals in the circumferential direction, and the circumferential copper bushings (10) are arranged at intervals in the axial direction.

5. The DC motor electric commutation device for mining according to claim 4, characterized in that, it includes eight finger contacts (1), four axial copper bushings (9) and four circumferential copper bushings (10), eight finger contacts (1) are grouped into four, and two groups of finger contacts (1) are symmetrically arranged on both sides of the axis of the commutation member, and four axial copper bushings (9) are arranged in pairs, and each group of axial copper bushings (9) is arranged along the axial direction of the commutation member.

6. The DC motor electric commutation device for mining according to claim 2, characterized in that, It further includes a first L-shaped plate (15), a second L-shaped plate (16) symmetrically arranged above and below the first L-shaped plate (15), and a connecting plate (17) connecting the first L-shaped plate (15) and the second L-shaped plate (16). A reversing drum shaft (14) for driving its rotation is penetrated through the central axis of the reversing hub (8). One end of the reversing drum shaft (14) penetrates through the first L-shaped plate (15) and is connected to the drive assembly, and the other end penetrates through the second L-shaped plate (16) and is connected to the cam (13). A copper bushing (18) is sleeved at the through-hole of the reversing drum shaft (14) where it penetrates through the first L-shaped plate (16) and the second L-shaped plate (16).

7. An electric commutation device for a mine-used DC motor according to claim 6, characterized in that, the drive assembly includes a torque motor (2) and a motor bushing (3) sleeved on the output end of the torque motor (2). A shaft nail (5) is arranged on the motor bushing (3). A reversing wheel bushing (4) is sleeved on the end of the reversing drum shaft (14) close to the drive assembly. A plurality of shaft nail holes (6) corresponding to the shaft nails (5) are arranged on one side of the reversing wheel bushing (4) close to the motor bushing (3). The motor bushing (3) is inserted on the reversing wheel bushing (4) through the cooperation between the shaft nails (5) and the shaft nail holes (6).

8. An electric commutation device for a mine-used DC motor according to claim 7, characterized in that, a commutation module (19) for processing remote signals is further installed on the second L-shaped plate (16).

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