CN215338059U

CN215338059U - Electric differential head

Info

Publication number: CN215338059U
Application number: CN202121582673.4U
Authority: CN
Inventors: 王超; 汤建军; 杜文武; 邢立娜; 李朝阳
Original assignee: Anhui Specreation Instrument Science & Technology Co ltd
Current assignee: Anhui Specreation Instrument Science & Technology Co ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2021-12-28
Anticipated expiration: 2031-07-09

Abstract

The utility model provides an electric differential head, comprising: the device comprises a fixed base, a driving device, a measuring rod seat, a measuring rod and a connecting piece, wherein a cavity is formed in the fixed base; the driving device is arranged at the first end of the fixed base and extends into the cavity; the measuring rod seat is arranged at the second end of the fixed base, and a threaded through hole is formed in the measuring rod seat; the measuring rod is installed in the threaded through hole in a threaded connection mode, and the threaded through hole and a driving shaft of the driving device are coaxially arranged; the two ends of the connecting piece are respectively connected with the measuring rod and the driving shaft, and the connecting piece stretches under the acting force of the driving shaft and the measuring rod when the driving shaft rotates; the measuring rod, the connecting piece and the driving shaft move synchronously along the circumferential direction. The utility model effectively solves the problems of complex integral structure and larger volume of the existing electric differential head.

Description

Electric differential head

Technical Field

The utility model relates to the field of measuring equipment, in particular to an electric differential head.

Background

The differential head has the characteristics of high precision, small volume, simple structure and the like, can be used for measuring the size of a part, can be used for precisely pushing the sliding table to move, can be used for manufacturing a precise linear introducer and a precise multidimensional adjusting mechanism, and has wide application in the field of precise machinery. Most of the differential heads popular in the market at present mainly adopt manual differential heads which are difficult to realize automatic control, thereby hindering the promotion of intelligent production.

However, the electric differential head in the market is electrically driven by adding an auxiliary device around the manual differential head, and is improved based on the manual differential head, so that the whole structure is complicated, the volume is large, and the small-sized differential head with high precision is difficult to be manufactured.

SUMMERY OF THE UTILITY MODEL

In view of the above disadvantages of the prior art, an object of the present invention is to provide an electric differential head, so as to solve the problems of the conventional electric differential head that the whole structure is complicated and the volume is large.

In order to achieve the above and other related objects, the present invention provides an electric differential head, which includes a fixed base, a driving device, a measuring rod seat, a measuring rod and a connecting member, wherein a cavity is disposed inside the fixed base; the driving device is arranged at the first end of the fixed base and extends into the cavity; the measuring rod seat is arranged at the second end of the fixed base, and a threaded through hole is formed in the measuring rod seat; the measuring rod is installed in the threaded through hole in a threaded connection mode, and the threaded through hole and a driving shaft of the driving device are coaxially arranged; the two ends of the connecting piece are respectively connected with the measuring rod and the driving shaft, and the connecting piece stretches under the acting force of the driving shaft and the measuring rod when the driving shaft rotates; the measuring rod, the connecting piece and the driving shaft move synchronously along the circumferential direction.

In summary, the driving device provides driving force, and under the synergistic effect of the measuring rod seat, the connecting piece and the measuring rod, the axial extension and retraction of the connecting piece are realized, so that the measuring rod can axially advance or retreat, and the automatic movement of the measuring rod is realized. The utility model has simple structure and convenient use, and is convenient to realize small size and high precision due to the simple structure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electric differential head according to an embodiment of the present invention.

Description of the element reference numerals

1. A fixed base; 101. a cavity; 102. a first end of the fixed base; 103. a second end of the fixed base; 104. a first through hole; 105. a second through hole; 106. a third through hole; 2. a drive device; 21. a motor; 22. an encoder; 3. a measuring rod base; 31. a threaded through hole; 4. a connecting member; 5. a measuring rod; 51. a protrusion; 6. and (6) displaying the meter digitally.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. It is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the respective manufacturers.

Please refer to fig. 1. It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions of the present disclosure, so that the present disclosure is not limited to the technical essence, and any modifications of the structures, changes of the ratios, or adjustments of the sizes, can still fall within the scope of the present disclosure without affecting the function and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Referring to fig. 1, an object of the present invention is to provide an electric differential head to solve the problems of complex overall structure and large volume of the conventional electric differential head. This electronic differential head includes: the device comprises a fixed base 1, a driving device 2, a measuring rod seat 3, a connecting piece 4 and a measuring rod 5; wherein, a cavity 101 is arranged in the fixed base 1, the fixed base 1 is used for fixing the driving device 2 and the measuring rod seat 3, and the cavity 101 is used for placing the connecting piece 4; the driving device 2 is arranged at the first end 102 of the fixed base and extends into the cavity 101; the driving device 2 is provided with a driving shaft which can rotate circumferentially to provide driving force; the measuring rod seat 3 is arranged at the second end 103 of the fixed base, and a threaded through hole 31 is formed in the measuring rod seat 3; the connecting piece 4 is arranged in the cavity 101, one end of the connecting piece is connected with the driving device 2, and the connecting piece 4 and the driving device 2 do synchronous motion along the circumferential direction under the driving of the driving device 2; the measuring rod 5 is installed in the threaded through hole 31 in a threaded manner, and the threaded through hole 31 and a driving shaft of the driving device 2 are coaxially arranged; the other end of the connecting piece 4 is connected with the first end of the measuring rod 5. When the drive shaft rotates, the connecting element 4 is axially extended and retracted under the action of the drive shaft and the measuring rod 5. The measuring rod 5 and the connecting piece 4 move synchronously along the circumferential direction under the driving of the connecting piece 4.

The driving device 2 drives the connecting piece 4 to synchronously rotate, so as to drive the measuring rod 5 to synchronously rotate; meanwhile, the connecting piece 4 can do telescopic motion in the axial direction, so that the measuring rod 5 still does linear motion in the axial direction under the action of the measuring rod seat 3, and meanwhile, the connecting piece 4 is driven to do telescopic motion in the axial direction. Thereby converting the circumferential driving force of the driving device 2 into axial movement, thereby realizing measurement. The utility model has simple structure and convenient operation, and can meet the requirements of high precision and small size. The shape of the fixed base 1 is not limited, and may be a closed housing (in which a cavity 101 with both ends open is provided), or may be another shape provided with a cavity, such as a U-shaped base.

Referring to fig. 1, in an embodiment of the present invention, the driving device 2 is a stepping motor or a servo motor. The measurement result can be obtained by the number of rotations of the stepping motor or the servo motor and the pitch of the threaded through hole, and the number of rotations of the stepping motor or the servo motor can be obtained by the motor controller. In addition, the present embodiment is applied to industrial control in which digital display of the electric differential head is not required, and when used, a controller of the motor may be connected to a controller in the industrial control.

Referring to fig. 1, in an embodiment of the present invention, the driving device 2 includes a motor 21 and an encoder 22; the casing of the motor 21 is fixed at the first end of the fixed base 1, the motor shaft of the motor 21 extends into the cavity 101, the fixed part of the encoder 22 is fixed on the side wall of the cavity 101, and the rotating part of the encoder 22 is fixed on the rotating shaft of the motor 21. The motor 21 may be a general motor, or may be a stepping motor or a servo motor. The encoder 22 is used for measuring the angular displacement of the motor rotating shaft and obtaining the measurement result. The embodiment mode is suitable for the industrial control without the need of carrying out digital display of the electric differential head, and when the digital display controller is used, the encoder is connected with the controller in the industrial control. In the foregoing embodiments and this embodiment, the fixing base 1 and the motor 21 can select a corresponding fixing mode according to the interface of the selected motor.

In order to enable the electric differential head to be used independently, a digital display meter 6 can be additionally arranged and is positioned outside the fixed base 1, the encoder 22 is connected with the digital display meter 6 through a lead, and a first through hole 104 for placing the lead is formed in the fixed base 1. The conductive line may be a signal line. The digital display meter 6 can directly display the measurement result for the reading of the staff.

Referring to fig. 1, in an embodiment of the present invention, the connecting member 4 is an axially retractable coupling. The coupler can select suitable coupler according to the stroke requirement, for example, common diaphragm coupler allows axial expansion and contraction of 0.1mm, a spiral spring type coupler allows axial expansion and contraction of 2mm, a corrugated pipe type coupler allows axial expansion and contraction of 3mm, and an 8-shaped coupler allows axial expansion and contraction of 7 mm. The coupler is connected with the measuring rod and the motor shaft, the coupler allows axial expansion and contraction, and the rotation of the motor 21 is converted into spiral advancing movement of the measuring rod by utilizing the axial expansion and contraction of the coupler.

Referring to fig. 1, in order to facilitate fixing and detaching the coupler, in an embodiment of the present invention, a second through hole 105 and a third through hole 106 are formed on the fixing base 1. The second through hole 105 and the third through hole 106 are respectively located at the position of the fixing hole of the coupler and are used for fixing or detaching the coupler.

Referring to fig. 1, in an embodiment of the present invention, the measuring rod base 3 is a nut, and the nut is fixedly connected to the fixing base 1. The measuring rod 5 is a screw rod. The screw and the nut adopt finished thread pairs, and a proper thread pair can be selected according to the precision of the differential head and the required driving force. The fixing mode of the fixing base 1 and the nut comprises the modes of holding tightly, supporting tightly on the side face, screwing threads, welding and the like, and the fixing base can be fixed in a proper mode according to the type of the nut and the shape of the fixing base.

Referring to fig. 1, in an embodiment of the present invention, a protrusion 51 is disposed on a second end of the measuring rod 5. The shape of the protrusion 51 is not limited, and in this embodiment, the side of the protrusion 51 away from the second end of the measuring rod 5 is spherical, and the spherical protrusion has good pressure resistance, so that the service life of the measuring rod 5 can be prolonged.

Referring to fig. 1, in the present invention, when the type of the motor is selected as the stepping motor or the servo motor, the digital display table 6 and the encoder 22 may not be provided, for example, in the automatic control system, the controller of the stepping motor or the servo motor is electrically connected to the controller of the automatic control system, and the measurement distance is obtained by the number of revolutions of the motor and the pitch of the threaded through hole 31, but in consideration of the cost, the ordinary motor and the encoder 22 may be selected to replace the stepping motor or the servo motor to realize the driving and obtain the measurement result, the encoder 22 may obtain the number of revolutions of the motor, and the measurement distance is obtained by the number of revolutions of the motor and the pitch of the threaded through hole 31, and when in use, the encoder is electrically connected to the controller of the control system, thereby reducing the production cost. In addition, in the above embodiment, in consideration of the independence and the simplicity of use, the number display table 6 may be additionally provided. The digital display meter 6 is fixed outside the fixed base 1. Therefore, the electric differential head has a wide application range.

In summary, the present invention provides a driving force through the driving device 2 to achieve axial extension and contraction of the connecting member 3, so that the measuring rod 5 can axially advance or retreat, thereby achieving automatic movement of the measuring rod 5, and obtains the rotation number of the driving device through the driving device 2 for obtaining the measuring result. Therefore, the utility model has simple structure, convenient use, suitability for an automatic control system and convenient realization of small size and high precision due to the simple structure. Meanwhile, the thread pair (the screw and the nut), the coupler and the motor involved in the utility model are all easily bought on the market, and do not need professional manufacturers. The proper parts can be selected according to the actual needs of the user, and the purchase cost is low; and the manufacture and the maintenance are easy, and the cost is low. Therefore, the utility model effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. An electric differential head comprises a fixed base and a driving device, and is characterized in that a cavity is arranged in the fixed base; the driving device is arranged at the first end of the fixed base and extends into the cavity; the electric differential head further comprises:

the measuring rod seat is arranged at the second end of the fixed base and is provided with a threaded through hole;

the measuring rod is installed in the threaded through hole in a threaded connection mode, and the threaded through hole and a driving shaft of the driving device are coaxially arranged;

the two ends of the connecting piece are respectively connected with the measuring rod and the driving shaft, and the connecting piece stretches under the acting force of the driving shaft and the measuring rod when the driving shaft rotates; the measuring rod, the connecting piece and the driving shaft move synchronously along the circumferential direction.

2. The motorised differential head according to claim 1, characterized in that the drive means are stepper motors or servomotors.

3. The electromotive differential head according to claim 1, wherein said driving means comprises a motor and an encoder; the casing of motor is fixed in fixed baseplate's first end, the motor shaft of motor stretches into in the cavity, the fixed part of encoder is fixed in on the lateral wall of cavity, the rotating part of encoder is fixed in the pivot of motor.

4. The electric differential head according to claim 3, further comprising a digital display meter, wherein the digital display meter is located outside the fixing base, the encoder is connected with the digital display meter through a wire, and the fixing base is provided with a first through hole for placing the wire.

5. The electromotive differential head as set forth in any one of claims 1 through 4 wherein said coupling member is an axially retractable coupling.

6. The electric differential head according to claim 5, wherein the fixing base has a second through hole and a third through hole, and the second through hole and the third through hole are respectively located at the fixing holes of the shaft coupling.

7. The electrical differential head of claim 5, wherein the coupling is any one of a diaphragm coupling, a coil spring type coupling, a bellows type coupling, and a 8-type coupling.

8. The electromotive differential head according to any of claims 1 to 4, wherein said measuring stem seat is a nut, said nut being fixedly connected to said fixed base.

9. The electromotive differential head according to claim 8, characterized in that said measuring rod is a screw.

10. The electromotive differential head according to any of claims 1 to 4, wherein the second end of the measuring rod is provided with a projection.