Multi-position gear selecting mechanism driven by single motor to perform composite axis motion and rotary motion

Abstract

The utility model relates to the technical field of cable fault detection, in particular to a single-motor-driven multi-position gear selecting mechanism with composite axial motion and rotary motion, which can control an output shaft to perform accurate position selection in the circumferential direction, and control the single motor to drive an input shaft and a cam to rotate by a position selecting switch, so that the output shaft can be controlled to perform accurate position selection in the circumferential direction. And meanwhile, the position of a point position is remeasured through a photoelectric sensor, then the position of the remeasured point is fed back to a control panel, and motor driving is controlled to control operation of a motor, so that a closed loop is formed, and the purpose of accurately controlling the switching position is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable fault detection technical field, concretely is a kind of single motor drive composite axis movement and multi-position gear selecting mechanism of rotary motion. BACKGROUND

[0002] The statements in this part only provide background technical information related to the utility model, and do not necessarily constitute prior art.

[0003] Multi-channel electrical on-off switching selection mechanism is widely used for gear selection switching of various high and low voltage equipment, and is mainly applied to equipment needing different gear switching selection, such as cable fault defect detection equipment.

[0004] The existing cable fault defect detection equipment is mostly manual gear selecting and position switching switch, and the similar products abroad are also multi-motor controlled axial and rotary separate operation gear selecting mechanism.Their shortcomings are not suitable for automatic equipment, or the structure is large, control is complicated, power unit and component are more, so not only the equipment space and economic burden are increased, more importantly, the failure risk of parts is increased.

[0005] Based on the above reasons, the utility model designs a kind of single motor drive composite axis movement and multi-position gear selecting mechanism of rotary motion, realizes rotary and axial composite motion only by single motor, reduces the requirement to motor at the same time, and realizes the accurate feedback to selected position, so as to realize the structure compact, performance accurate, not prone to failure. SUMMARY

[0006] The utility model aims at overcoming the insufficient of prior art, provides a kind of single motor drive composite axis movement and multi-position gear selecting mechanism of rotary motion, realizes rotary and axial composite motion only by single motor, reduces the requirement to motor at the same time, and realizes the accurate feedback to selected position, so as to realize the structure compact, performance accurate, not prone to failure.

[0007] In order to achieve the above purpose, the utility model provides a kind of single motor drive composite axis movement and multi-position gear selecting mechanism of rotary motion, the center of upper cover and shell is provided with input shaft, the axle disc of shell and input shaft is provided with photoelectric sensor, the bottom of mechanism is provided with output shaft, input shaft is connected with motor by coupling key, the inside of input shaft is provided with cam A by spring, cam A is clamped in the clamping groove of input shaft by steel ball;

[0008] Shell is fixedly provided with cam B, cam A is fixedly connected with output shaft, the gear teeth of cam B and the gear teeth of cam A are closely engaged with each other.

[0009] The number and position of photoelectric sensor are determined according to the number of gear selecting.

[0010] The input shaft is coaxial with the output shaft, the upper cover and the housing.

[0011] The teeth of the cam A and the cam B are symmetrical wave-shaped or ratchet-shaped.

[0012] The cam A and the cam B are coupled cams with tooth peaks and tooth valleys precisely cut relative to each other.

[0013] The clamping groove is arranged on the input shaft.

[0014] Compared with the prior art, the device can control the output shaft to be accurately positioned in the circumferential direction, control the rotation angle of the input shaft and the cam by the single motor drive through the positioning switch, accurately control the selected gear position, and simultaneously re-measure the position of the selected point by the photoelectric sensor, and feed back the re-measured point position to the control panel, control the motor drive to control the motor operation, thereby forming a closed loop to accurately control the switching position. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The structure of the utility model is shown Figure 1 .

[0016] Figure 2 The structure of the utility model is shown Figure 2 .

[0017] Figure 3 The structure of the utility model is shown Figure 3 .

[0018] Figure 4 The structure of the utility model is shown Figure 4 .

[0019] Figure 5 The structure of the utility model is shown

[0020] Figure 6 The structure of the utility model is shown

[0021] 1: upper cover, 2: input shaft, 3: housing, 4: photoelectric sensor, 5: output shaft, 6: motor, 7: coupling key, 8: spring, 9: cam A, 10: clamping groove, 11: cam B, 12: control panel, 13: motor drive, 14: switch frame, 15: switching moving disc, 16: switching fixed disc, 17: moving contact, 18: stationary contact. DETAILED DESCRIPTION

[0022] The utility model will be further described in combination with the drawings.

[0023] Reference Figures 1-6The utility model provides a kind of single motor drive composite axis movement and rotation movement's multiple position gear selecting mechanism, the center of upper cover 1 and shell 3 is provided with input shaft 2, shell 3 is provided with photoelectric sensor 4 on the axle disc of input shaft 2, the bottom of mechanism is provided with output shaft 5, input shaft 2 is connected with motor 6 by coupling key 7, the inside of input shaft 2 is provided with cam A 9 by spring 8, cam A 9 is clamped in input shaft 2's card slot 10 by steel ball,

[0024] Cam B 11 is fixedly arranged on shell 3, cam A 9 is fixedly connected with output shaft 5, the gear teeth of cam B 11 and the gear teeth of cam A 9 are closely meshed with each other.

[0025] The number and position of photoelectric sensor 4 are determined according to the number of gear selection.

[0026] The center of input shaft 2, output shaft 5, upper cover 1 and shell 3 is on the same axis.

[0027] The gear teeth of cam A 9 and cam B 11 are symmetrical wavy or ratchet.

[0028] Cam A 9 and cam B 11 are coupling cams with tooth peaks and tooth valleys accurately cut relative to each other.

[0029] The card slot 10 is arranged on the input shaft 2.

[0030] The working principle of the utility model is as follows:

[0031] As shown in Figure 1 , the center of upper cover 1 and shell 3 is provided with input shaft 2, shell 3 is provided with photoelectric sensor 4, and the bottom of mechanism is provided with output shaft 5.

[0032] When inputting, as shown in Figure 2 , Figure 3 , cam A 9 is located inside input shaft 2, spring 8 is arranged between the two to play a buffering and energy storage role, cam A 9 is fixedly connected with output shaft 5, and cam A 9 is clamped in card slot 10 inside input shaft 2 to ensure that it can only move axially relative to input shaft 2. When the rotating shaft of motor 6 drives input shaft 2 to rotate through coupling key 7, input shaft 2 drives cam A 9 to rotate through internal card slot 10 and steel ball, and at this time, cam A 9 moves axially in card slot 10 relative to input shaft 2 under the combined action of cam inclined surface axial component force and spring force, since output shaft 5 is fixedly connected with cam A 9, output shaft 5 performs composite motion of rotation and axial superposition at this time.

[0033] As shown in Figure 5As shown, cam A9 and cam B11 are two coupled cams with relatively accurate cutting of peaks and valleys according to gear requirements, the cam profile can be designed to be symmetrical wave or ratchet according to requirements, and after appropriate adjustment of the cam size, the cam can be divided according to the required number of gears from 2 gears upwards, and the embodiment is exemplified by an 8-gear ratchet cam mechanism.

[0034] When outputting, under the pressure of spring 8 between input shaft 2 and cam A9, cam A9 is tightly pressed on cam B11, and cam B11 is fixed on housing 3 and remains relatively stationary.

[0035] At this time, if motor 6 drives input shaft 2 to rotate, cam A9 will also rotate, and under the action of torque, the tooth profile slope between cam A9 and cam B11 will move relatively, and the peaks of cam A9 will slide up from the troughs of cam B11 along the slope to the peaks of cam B11; at this time, the output shaft 5 fixed with cam A9 can exhibit a composite motion of simultaneous rotation and axial motion; once the peak point of cam A9 passes the peak point of cam B11, cam A9 will lose the support of cam B11, and under the action of spring force of spring 8, the output shaft 5 will move axially in the opposite direction; in the case of ratchet-shaped cam, if the driving force of motor 6 is removed at this time, the peaks of cam A9 will quickly drop into the troughs of cam B11 under the action of spring force of spring 8, and even if there is a slight overshoot, the peaks of cam A9 will slide into the troughs of cam B11 along the downward slope of cam B11 under the action of spring force of spring 8, combined with the accurately cut peak and valley positions of the cams, thereby realizing accurate selection of gears (such as Figure 3 In the rotation of the cam, the wheel can be selected to fix the gear in the circumferential direction.

[0036] As Figure 4 As shown, slots are opened at the corresponding positions of the shaft disc of input shaft 2, combined with the on-off light signals of photoelectric sensor 4 fixed on housing 3, if a position light signal is turned on and marked as 1, and the light signal is turned off and marked as 0, then the positions in the circumferential direction can be encoded by adjusting the position and number of photoelectric sensor 4 on housing 3. For example, for an 8-position gear selection mechanism, the 8 positions in the circumferential direction can be encoded as 1110, 0110, 0111, 0011, 0001, 1001, 1000, and 1100, respectively. Finally, by comparing the position codes each time, the current position can be known, thereby ensuring the correctness of the selection switching.

[0037] As Figure 6As shown, the utility model discloses a switch frame 14 is arranged in the switch frame 14, and the motor drive 13 is provided on one side of the plane of the switch frame 14, and the control panel 12 of electrical control is provided on the other side.

[0038] In order to realize the accurate selection of the contact position, the rotation angle of the output shaft 5 must be accurately controllable, and here two precisely cut clamping cams, cam A9 and cam B11, are used to ensure the accuracy.

[0039] In order to ensure that the moving contact 17 is not damaged by friction during long-time rotation, the moving contact 17 must be lifted axially upward when rotating to separate from the stationary contact 18 and the switching fixed disc 16. The on-off function of the contact during rotation is realized by the relative movement of the inclined surfaces of the cam A9 and the cam B11 to realize the axial lifting, rotation and pressing action of the output shaft 5, and the lifting height of the contact is equal to the tooth top height minus the tooth bottom height of the cam A9 and the cam B11.

[0040] The above is only the preferred embodiment of the utility model, and is only used to help understand the method and core idea of the present application. The protection scope of the utility model is not limited to the above-mentioned embodiments. Any technical solution belonging to the idea of the utility model is within the protection scope of the utility model. It should be noted that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the utility model are also considered as the protection scope of the utility model.

[0041] In the description of the utility model, it should be pointed out that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0042] The utility model solves the problem that manual switching is needed to realize gear switching in the prior art, and even if automatic gear shifting is used, a motor for controlling rotation and a motor for controlling axial movement need to be respectively arranged. Therefore, the prior art is not suitable for automatic equipment, or the structure is large, the control is complicated, the power unit and the components are more, thereby increasing the equipment space and economic burden, and the risk of failure of parts and other disadvantages. The rotation and axial composite motion are realized by a single motor, which is the first invention of the patent. The utility model reduces the requirements on the motor, realizes accurate feedback of the selected position, and realizes the effects of compact structure, accurate performance and difficulty in failure.

Claims

1. A multi-position gear selection mechanism driven by a single motor for composite axis motion and rotational motion, characterized in that: An input shaft (2) is provided at the center of the upper cover (1) and the outer shell (3), a photoelectric sensor (4) is provided on the shaft disk of the outer shell (3) and the input shaft (2), an output shaft (5) is provided at the bottom of the mechanism, the input shaft (2) is connected to the motor (6) via a connecting key (7), a cam A (9) is provided inside the input shaft (2) via a spring (8), and the cam A (9) is clamped in the clamping groove (10) via a steel ball; A cam B (11) is fixedly provided on the housing (3), the cam A (9) is fixedly connected to the output shaft (5), and the gear teeth of the cam B (11) and the gear teeth of the cam A (9) are tightly meshed with each other.

2. The multi-position gear selection mechanism for composite axis and rotation motion driven by a single motor according to claim 1, characterized in that: The number and position of the photoelectric sensors (4) are determined according to the number of selected gears.

3. The multi-position gear selection mechanism for composite axis movement and rotational movement driven by a single motor according to claim 1, characterized in that: The centers of the input shaft (2), the output shaft (5), the upper cover (1) and the outer shell (3) are on the same axis.

4. The multi-position gear selection mechanism for composite axis and rotation motion driven by a single motor according to claim 1, characterized in that: The gear teeth of the cam A (9) and the cam B (11) are symmetrical wave-shaped or ratchet-shaped.

5. The multi-position gear selection mechanism for composite axis movement and rotation movement driven by a single motor according to claim 1, characterized in that: The cam A (9) and the cam B (11) are coupled cams in which the tooth peaks and tooth valleys are precisely cut relative to each other.

6. The multi-position gear selection mechanism for composite axis movement and rotational movement driven by a single motor according to claim 1, characterized in that: The clamping groove (10) is provided on the input shaft (2).

Images