CN203491843U - Power transmission device - Google Patents
Power transmission device Download PDFInfo
- Publication number
- CN203491843U CN203491843U CN201320542061.1U CN201320542061U CN203491843U CN 203491843 U CN203491843 U CN 203491843U CN 201320542061 U CN201320542061 U CN 201320542061U CN 203491843 U CN203491843 U CN 203491843U
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- CN
- China
- Prior art keywords
- push rod
- screw rod
- screw mandrel
- power transmission
- sleeve
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- Expired - Lifetime
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Abstract
The utility model discloses a device for converting the rotational motion of a motor into the rectilinear motion of a push rod. A power transmission device comprises a servo motor, a screw rod, a screw rod nut, a sleeve, and the push rod. The right shaft end of the screw rod serves as a rotor of the servo motor, and the rotation of the rotor serves as the rotation of the screw rod. The screw rod is supported by a screw rod support, wherein the interior of the screw rod support is provided with a bearing. The push rod is fixed with the screw rod nut. The rotation of the screw rod drives the screw rod nut, which is connected to the screw rod, to make horizontal movement in the sleeve, and drives the push rod to move back and forth, thereby enabling the rotational motion of the screw rod to be converted into the rectilinear motion of the push rod. The servo motor guarantees the precision of input power, and the screw rod support, a self-lubricating guide belt and the sleeve guarantee the stability of transmission. Meanwhile, the employed screw rod is easy to make and is low in cost under the condition that the bearing is guaranteed. The servo motor is employed for directly driving the screw rod to rotate, so that the overall structure is simplified and beautiful. The open-loop control is employed, thereby guaranteeing the precision, saving cost, and simplifying the structure.
Description
Technical field
The utility model belongs to machine power delivery applications technical field, particularly relates to the device that a kind of rotary power by servomotor is converted to straight line power, more precisely a kind of straight-line device that rotatablely moving of motor is converted to push rod.
Background technology
Power transmission, electric pushrod etc. be a series of to be converted to straight-line device in order to rotatablely moving and to be widely used, and by such device, the rotation of motor output shaft can be converted to the rectilinear motion of push rod by planetary roller or ball screw etc.They are equipped with servomotor, therefore have advantages of that precise rotation is controlled, accurately revolution is controlled, accurately moment of torsion is controlled, can apply to as the substitute of cylinder and hydraulic cylinder in actual production life.
Utility model content
The purpose of this utility model is to provide a kind of power transmission, has structure and simplifies, and the precision of input power is high, can accurately control the advantage of stroke,
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of power transmission is provided, comprises motor, screw mandrel, feed screw nut, sleeve and push rod, the right axle head of screw mandrel serves as the rotor of servomotor, and servo motor rotor rotates, and is screw mandrel and rotates; Screw mandrel by inside be provided with bearing screw mandrel support support; Push rod and feed screw nut fix, and the feed screw nut of the connection that the rotation band of screw mandrel is dynamically connected on it on it does translational motion in sleeve, drive push rod to move forward and backward, and make rotatablely moving of screw mandrel be converted to the rectilinear motion of push rod.
In above power transmission, wherein, the front end of described sleeve is provided with cover plate, offers the hole of passing for push rod in the middle of cover plate.Further, between the inwall in described hole and push rod, be provided with for dustproof sealing ring, between the inwall in described hole and push rod, be provided with for the lubricated self-lubricating guidance tape with guaranteeing push rod traveling priority.Described screw mandrel support is fixed on servomotor, and cover plate adopts screw rod to be connected and fixed muffle with screw mandrel support.
In above power transmission, wherein, between described push rod and sleeve, be provided with for the lubricated self-lubricating guidance tape with guaranteeing push rod traveling priority.
In above power transmission, wherein, described screw mandrel is planetary roller screw mandrel or ball screw.
In above power transmission, wherein, described servomotor adopts half-closed loop control.
The technique effect of technical solutions of the utility model is: by servomotor, guaranteed the precision of input power, by screw mandrel support, self-lubricating guidance tape and sleeve, guaranteed the stable of transmission; Its screw mandrel adopting is manufactured simple, inexpensive in the situation that guaranteeing load-bearing simultaneously; Adopt servomotor directly to drive screw mandrel to rotate, overall structure is simplified attractive in appearance; Adopt open loop to control and also when having guaranteed precision, save cost, simplified structure.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the power transmission of the utility model embodiment.
Fig. 2 is the cross section view of the power transmission of the utility model embodiment.
Fig. 3 is the cover plate partial enlarged drawing of III portion in Fig. 2.
Fig. 4 is the push rod partial enlarged drawing of IV portion in Fig. 2.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in detail.
Fig. 1 is the overall structure schematic diagram of the power transmission of the present embodiment, and rightmost is servomotor, and centre is the sleeve of screw rod transmission, the push rod that high order end is power transmission.
Fig. 2 is the cross section view of the power transmission of the present embodiment, and servomotor 7 is supported by screw mandrel support 4 and electric motor end cap 5 with screw mandrel 8, and screw mandrel support 4 is connected with electric motor end cap 5 in it bearing, and bearing is to guarantee freely rotating of screw mandrel 8.Feed screw nut 9 matches with screw mandrel 8, rotatablely moving of screw mandrel 8 is converted into feed screw nut 9 front and back rectilinear motion, and feed screw nut 9 is fixedly connected with push rod 1 by screw.Push rod can, in the interior slip of sleeve 3, be provided with between push rod and sleeve for the lubricated self-lubricating guidance tape with guaranteeing push rod traveling priority.
In the middle of the front end cover plate 2 of power transmission left end, be equipped with the hole of matching with push rod 1, it has together guaranteed that with sleeve and screw mandrel support the straight-line of push rod stablize, and the details of front end cover plate 1 is that during III is enclosed region is as shown in Figure 3.
The utility model adopts half-closed loop control, by the angular encoder of servomotor inside, the angle of rotor, angular speed and angular acceleration etc. is monitored and is fed back, simultaneously compensating error; The every data that monitored by motor encoder and helical pitch can calculate the straight-line position of push rod, the information such as speed and acceleration.Because spot-welded only need to be welded arm and moving point electrode cap and the Work-sheet pressing that welds arm surely, for advancing of moving weldering arm, there is no very high-precision requirement with the position stopping, so in fact without in closed-loop control for monitoring the grating of the position of the push rod that connects moving weldering arm, without the closed-loop control of full accuracy.So also can save and control cost, more economically environmental protection.Meanwhile, the monitoring of its semiclosed loop and the function of compensation are better than again electric pushrod or the power transmission of complete open loop, and this provides necessary debugging each execution unit of soldering turret and it is made to the monitoring function of directive function for adjusting.By encoders monitor to data carry out again active force between weldering arm electrode that computing obtains, the critical datas such as weldering arm deformation are all convenient to debug at any time at welding scene.This has enough met the various demands in the special-purpose soldering turret welding field of robot that the utility model is applied to.
The utility model adopts servomotor directly to drive, and speed reducing ratio is 1:1, and convenient adjusting, reduces loss, improves transmission efficiency.
The utility model adopts ball screw to change and rotatablely moves as rectilinear motion.The conversion equipment being commonly used on power transmission, push rod is planetary roller screw mandrel or is ball screw.The soldering turret that ball screw can be hundreds of kilograms for welding moment clamping force, and manufacture simply, price is comparatively cheap.
Figure 3 shows that the details of front end cover plate.In the middle of cover plate 2, hole matches with push rod, separately has 51 and 52 to be self-lubricating guidance tape, is installed on the inwall in hole, for lubricated and guiding.Article two, the guide effect of guidance tape is better.Dust ring 53 enters cylinder body for preventing dust chip, pollution lubricating grease, and each counterpart weares and teares.
Figure 4 shows that the part details of push rod.Push rod 1 cylindrical matches with sleeve 3, separately has 54 and 55 to be self-lubricating guidance tape, is installed on the cylindrical of push rod, for lubricated and guiding.Article two, the guide effect of guidance tape is better.
Above embodiment is preferred embodiment of the present utility model; the utility model is not limited to above-described embodiment; for those of ordinary skills; the any apparent change of doing on the basis that does not deviate from the utility model know-why, all belongs to the protection range of design of the present utility model and claims.
Claims (8)
1. a power transmission, is characterized in that comprising servomotor, screw mandrel, feed screw nut, sleeve and push rod; The right axle head of described screw mandrel serves as the rotor of servomotor, and servo motor rotor rotates and is screw mandrel rotation, and screw mandrel is provided with the screw mandrel stent support of bearing by inside; Described push rod and feed screw nut fix, and the feed screw nut that the rotation band of screw mandrel is dynamically connected on it does translational motion in sleeve, drive push rod to move forward and backward, and make rotatablely moving of screw mandrel be converted to the rectilinear motion of push rod.
2. power transmission according to claim 1, is characterized in that: the front end of described sleeve is provided with cover plate, offers the hole of passing for push rod in the middle of cover plate.
3. power transmission according to claim 2, is characterized in that: between the inwall in described hole and push rod, be provided with for dustproof sealing ring.
4. power transmission according to claim 2, is characterized in that: between the inwall in described hole and push rod, be provided with for the lubricated self-lubricating guidance tape with guaranteeing push rod traveling priority.
5. according to the power transmission described in claim 2～4 Arbitrary Term, it is characterized in that: described screw mandrel support is fixed on servomotor, cover plate adopts screw rod to be connected and fixed muffle with screw mandrel support.
6. power transmission according to claim 1, is characterized in that: between described push rod and sleeve, be provided with for the lubricated self-lubricating guidance tape with guaranteeing push rod traveling priority.
7. power transmission according to claim 1, is characterized in that: described screw mandrel is planetary roller screw mandrel or ball screw.
8. power transmission according to claim 1, is characterized in that: described servomotor adopts half-closed loop control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320542061.1U CN203491843U (en) | 2013-09-02 | 2013-09-02 | Power transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320542061.1U CN203491843U (en) | 2013-09-02 | 2013-09-02 | Power transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203491843U true CN203491843U (en) | 2014-03-19 |
Family
ID=50262643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320542061.1U Expired - Lifetime CN203491843U (en) | 2013-09-02 | 2013-09-02 | Power transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203491843U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110855071A (en) * | 2019-10-15 | 2020-02-28 | 北京精密机电控制设备研究所 | Electromechanical actuator |
| CN111077018A (en) * | 2019-12-30 | 2020-04-28 | 华中科技大学 | Light unidirectional loading test device and application thereof |
-
2013
- 2013-09-02 CN CN201320542061.1U patent/CN203491843U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110855071A (en) * | 2019-10-15 | 2020-02-28 | 北京精密机电控制设备研究所 | Electromechanical actuator |
| CN111077018A (en) * | 2019-12-30 | 2020-04-28 | 华中科技大学 | Light unidirectional loading test device and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140319 |
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| CX01 | Expiry of patent term |