CN209196059U - A kind of motor-driven cylinder screw mechanism stroke limit protection device - Google Patents
A kind of motor-driven cylinder screw mechanism stroke limit protection device Download PDFInfo
- Publication number
- CN209196059U CN209196059U CN201821426680.3U CN201821426680U CN209196059U CN 209196059 U CN209196059 U CN 209196059U CN 201821426680 U CN201821426680 U CN 201821426680U CN 209196059 U CN209196059 U CN 209196059U
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- China
- Prior art keywords
- motor
- lead screw
- guide pad
- driven cylinder
- rotation guide
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Abstract
The utility model relates to a kind of motor-driven cylinder screw mechanism stroke limit protection devices, comprising: output shaft (1), shell (2), lead screw (3), anti-rotation guide pad (4), feed screw nut (5), spring bearing (6).The motor-driven cylinder screw mechanism distance caging device of the utility model; at mechanical trip position; even if lead screw has beyond the driving moment using limitation; such as when high-power actuation; it remains to protect the reliable mechanical stop limit of motor-driven cylinder; it is unlikely to directly to damage limit part, improves safety in utilization and reliability.
Description
Technical field
The utility model belongs to motor-driven cylinder design field, and in particular to a kind of motor-driven cylinder screw mechanism stroke limit guarantor
Protection unit.
Background technique
In linear motor-driven cylinder field, lead screw is common component, in order not to allow lead screw to rotate to extreme position, is often needed
It will be to its design runlength protective device.Traditional stroke protecting device design mainly by way of electric limiting and mechanical is protected
The mode of shield.Lead limit switch is for example arranged in the method for electric limiting, and mechanical position limitation method is usually to design backstop at both ends
Block.When using mechanical position limitation, when lead screw rotates to extreme position, feed screw nut for linear motion strikes limited block and stops
It only moves, still, this structure is when lead screw driving force is very big, revolving speed is higher, movement inertia is larger or negative load is larger, often
Phenomena such as part of limit can be made to be damaged or kill by hard hit, or stall occurs and burns out the devices such as motor or controller
Part is seriously affected using safe, is repaired also relatively difficult.Slow down although having in the impact surface modes such as add the cushions, there is lining
The problems such as pad is easier to fall off, active area is smaller, and local stress great Yi is damaged, complex process.
Utility model content
The utility model is completed in order to solve the above problem, it is therefore intended that proposes a kind of safe motor-driven cylinder silk
Bar mechanical distance caging device, when lead screw reaches mechanical trip position, can safely and reliably backstop mechanical trip, be hardly damaged
Backstop limits part, convenient for guaranteeing the use reliably and with long-term of motor-driven cylinder.
In view of the above problem of the prior art, according to one aspect disclosed by the utility model, the utility model is used
Following technical scheme:
A kind of motor-driven cylinder screw mechanism stroke limit protection device, comprising: output shaft 1, shell 2, lead screw 3, anti-transduction
To block 4, feed screw nut 5, spring bearing 6；
Wherein, feed screw nut 5 and anti-rotation guide pad 4 are connected by friction pre-fastening moment installation, and the inner cavity of shell 2, which is equipped with, leads
To slot, the earrings and motor-driven cylinder external connection of 1 one end of output shaft, the other end is hollow circuit cylinder, 1 hollow circuit cylinder one end of output shaft
It protrudes into shell 2, is connected with anti-rotation guide pad 4, anti-rotation guide pad 4 makees linear reciprocation sliding, lead screw in the guide groove of shell 2
Nut 5 and lead screw 3 form lead screw pair, and lead screw pair is inserted into the perforation of anti-rotation guide pad 4, and lead screw pair one end is located in output shaft 1
In hollow round column, the other end is located in shell 2, and spring bearing 6 is located in the inner cavity of shell 2, supports lead screw 3 by spring bearing 6
Rotation, 3 both ends of lead screw and 5 both ends circumferencial direction of feed screw nut are equipped with stop block.
It is characterized in that, the stop block at 3 both ends of lead screw, the stop block at 5 both ends of feed screw nut is integrated processing, or is independent
Part.
It is characterized in that, 4 upper and lower ends of anti-rotation guide pad have protrusion guide way, the guide way be feather key or
The cylinder of protrusion, guide way move back and forth anti-rotation guide pad 4 in the guide groove of shell 2.
It is characterized in that, the lead screw 3 is under the power drive of motor-driven cylinder, rotary motion.
It is characterized in that, the output shaft 1 and anti-rotation guide pad 4 are connected, make linear reciprocation fortune with anti-rotation guide pad 4
It is dynamic.
It is characterized in that, the feed screw nut 5 and anti-rotation guide pad 4, are installed by pre-fastening moment and are connected, pre-fastening moment
Play limitation transmitting torque, when proper motion, feed screw nut 5 and anti-rotation guide pad 4 are opposing stationary, together along shell 2
Guide groove makees straight reciprocating motion；When having more than the torque of pre-fastening moment between the two, relative motion will occur and skid, skid
When, feed screw nut 5 keeps connection not disengage with respect to 4 rotary motion of anti-rotation guide pad.
It is characterized in that, the maximum output power of the output according to required for motor-driven cylinder, sets corresponding pre-fastening moment value.
The utility model has the advantages that
The motor-driven cylinder screw mechanism distance caging device of the utility model, at mechanical trip position, even if lead screw has
Beyond the driving moment for using limitation, such as when high-power actuation, remain to protect the reliable mechanical stop limit of motor-driven cylinder,
It is unlikely to directly to damage limit part, improves safety in utilization and reliability.
Detailed description of the invention
Fig. 1 motor-driven cylinder screw mechanism stroke limit protection device structure chart
Fig. 2 lead screw pair stop block illustrates axial view
Specific embodiment
The utility model is described in further detail below with reference to embodiment, but the embodiments of the present invention is not
It is limited to this.
A kind of motor-driven cylinder screw mechanism distance caging device of the utility model as shown in Figure 1, including output shaft 1, shell
Body 2, lead screw 3, anti-rotation guide pad 4, feed screw nut 5, spring bearing 6；Wherein, feed screw nut 5 and anti-rotation guide pad 4 pass through friction
Pre-fastening moment installation connection, the inner cavity of shell 2 are equipped with guide groove, the earrings and motor-driven cylinder external connection of 1 one end of output shaft, separately
One end is hollow circuit cylinder, and 1 hollow circuit cylinder one end of output shaft is protruded into shell 2, is connected with anti-rotation guide pad 4, anti-rotation guide pad 4 exists
Make linear reciprocation sliding in the guide groove of shell 2, feed screw nut 5 and lead screw 3 form lead screw pair, and lead screw pair is inserted into anti-rotation guide pad
In 4 perforation, lead screw pair one end is located in 1 hollow circuit cylinder of output shaft, and the other end is located in shell 2, by 6 supporting wire of spring bearing
The rotation of thick stick 3,3 both ends of lead screw and 5 both ends circumferencial direction of feed screw nut are equipped with stop block, as shown in Figure 2.
The stop block at 3 both ends of lead screw, the stop block at 5 both ends of feed screw nut are integrated processing or independent part.
There is the guide way of protrusion on the anti-rotation guide pad 4, which is the cylinder of feather key or protrusion, guide way
Move back and forth anti-rotation guide pad 4 in the guide groove of shell 2.
The lead screw 3 is the rotary motion under the power drive of motor-driven cylinder.
The output shaft 1 is connected for linear motion with anti-rotation guide pad 4.
The feed screw nut 5 and anti-rotation guide pad 4, is installed by pre-fastening moment and is connected, and pre-fastening moment plays limitation transmitting
The effect of torque, when proper motion, feed screw nut 5 and anti-rotation guide pad 4 are opposing stationary, make together along the guide groove of shell 2 straight
Line movement；When having more than the torque of pre-fastening moment between the two, relative motion will occur and skid, when skidding, 5 phase of feed screw nut
To 4 rotary motion of anti-rotation guide pad, but still connection is kept not disengage.
The maximum output power of the output according to required for motor-driven cylinder sets corresponding pre-fastening moment value.
When proper motion, feed screw nut 5 and anti-rotation guide pad 4 are opposing stationary, and the guide groove along shell 2 makees straight line fortune together
It is dynamic.When lead screw 3 and feed screw nut 5 move to limit travel, the stop block on lead screw 3 and feed screw nut 5 is in a circumferential direction
Contact, by 5 backstop of feed screw nut, stop torque is transmitted between feed screw nut 5 and anti-rotation guide pad 4 for the rotary motion of lead screw 3,
If turning moment has been more than the preload limit value between feed screw nut 5 and anti-rotation guide pad 4, feed screw nut 5 will be with anti-transduction
It skids to block 4, together rotary motion, when skidding, lead screw 3 is moved with feed screw nut 5 together synchronous rotary, and output shaft is parked in
It is in situ not export straight-line displacement.The energy that large torque is hit when to consume mechanical position limitation.
When the lead screw 3 and feed screw nut 5 reaches the limit of travel position, the two is passing through direction of rotation circumferential direction backstop just
Face contact is such as schemed, rather than the backstop action that the planar friction in axial direction is screwed into, and greatly reduces contact surface and is screwed closed-bite maloccllusion
Risk.
Claims (5)
1. a kind of motor-driven cylinder screw mechanism stroke limit protection device characterized by comprising output shaft (1), shell (2),
Lead screw (3), anti-rotation guide pad (4), feed screw nut (5), spring bearing (6)；
Wherein, feed screw nut (5) and anti-rotation guide pad (4) are connected by friction pre-fastening moment installation, and the inner cavity of shell (2) is equipped with
Guide groove, the earrings and motor-driven cylinder external connection of output shaft (1) one end, the other end is hollow circuit cylinder, output shaft (1) hollow circle
Column one end is protruded into shell (2), is connected with anti-rotation guide pad (4), and anti-rotation guide pad (4) is made straight in the guide groove of shell (2)
Line reciprocatingly slides, and feed screw nut (5) and lead screw (3) form lead screw pair, and lead screw pair is inserted into the perforation of anti-rotation guide pad (4), silk
Thick stick pair one end is located in output shaft (1) hollow circuit cylinder, and the other end is located in shell (2), and spring bearing (6) is located at shell (2)
In inner cavity, by the rotation of spring bearing (6) support lead screw (3), lead screw (3) both ends and feed screw nut (5) both ends circumferencial direction are equal
Equipped with stop block.
2. a kind of motor-driven cylinder screw mechanism stroke limit protection device as described in claim 1, which is characterized in that lead screw
(3) stop block at both ends, the stop block at feed screw nut (5) both ends are integrated processing, or are independent part.
3. a kind of motor-driven cylinder screw mechanism stroke limit protection device as claimed in claim 2, which is characterized in that described
Anti-rotation guide pad (4) upper and lower ends have the guide way of protrusion, which is the cylinder of feather key or protrusion, and guide way makes anti-rotation
Guide pad (4) moves back and forth in the guide groove of shell (2).
4. a kind of motor-driven cylinder screw mechanism stroke limit protection device as claimed in claim 3, which is characterized in that described
Lead screw (3) is under the power drive of motor-driven cylinder, rotary motion.
5. a kind of motor-driven cylinder screw mechanism stroke limit protection device as claimed in claim 4, which is characterized in that described
Output shaft (1) and anti-rotation guide pad (4) are connected, and make straight reciprocating motion with anti-rotation guide pad (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821426680.3U CN209196059U (en) | 2018-08-31 | 2018-08-31 | A kind of motor-driven cylinder screw mechanism stroke limit protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821426680.3U CN209196059U (en) | 2018-08-31 | 2018-08-31 | A kind of motor-driven cylinder screw mechanism stroke limit protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209196059U true CN209196059U (en) | 2019-08-02 |
Family
ID=67405562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821426680.3U Active CN209196059U (en) | 2018-08-31 | 2018-08-31 | A kind of motor-driven cylinder screw mechanism stroke limit protection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN209196059U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022600A (en) * | 2019-12-12 | 2020-04-17 | 捷福装备（武汉）股份有限公司 | Electric combined folding electric cylinder |
| CN112630951A (en) * | 2020-11-28 | 2021-04-09 | 中国航空工业集团公司洛阳电光设备研究所 | Ball screw fixing part with high-reliability limiting device |
-
2018
- 2018-08-31 CN CN201821426680.3U patent/CN209196059U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022600A (en) * | 2019-12-12 | 2020-04-17 | 捷福装备（武汉）股份有限公司 | Electric combined folding electric cylinder |
| CN112630951A (en) * | 2020-11-28 | 2021-04-09 | 中国航空工业集团公司洛阳电光设备研究所 | Ball screw fixing part with high-reliability limiting device |
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