CN201373088Y - Limit gear box assembly - Google Patents
Limit gear box assembly Download PDFInfo
- Publication number
- CN201373088Y CN201373088Y CN200920126900U CN200920126900U CN201373088Y CN 201373088 Y CN201373088 Y CN 201373088Y CN 200920126900 U CN200920126900 U CN 200920126900U CN 200920126900 U CN200920126900 U CN 200920126900U CN 201373088 Y CN201373088 Y CN 201373088Y
- Authority
- CN
- China
- Prior art keywords
- input shaft
- limit switch
- electronic control
- gearbox
- box assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a limit gear box assembly. External threads are arranged on an input shaft of a gear-box, a sliding bushing is sleeved on the input shaft, internal threads of the sliding bushing are engaged with the external threads on the input shaft, the sliding bushing is connected with installing boards through an electronic control rod which is perpendicular to the input shaft, the installing boards are disposed on the box body of the gear-box and parallel to the input shaft, a guide through groove is arranged on the installing boards along with the input shaft, one end of the electronic control rod is positioned inside the guide through groove, a first limit switch and a second limit switch are respectively positioned on the installing boards at two ends of the guide through groove, and when moving up and down along with the input shaft, the electronic control rod is guided to optionally contact with the first limit switch or the second limit switch. The limit gear box assembly realizes limiting the stroke of moving parts by means of limiting the stroke of the electronic control rod disposed on the input shaft of the gear-box with the electronic limit switches, thereby obtaining accurate positioning of transmission.
Description
Technical field
The utility model relates to a kind of gear-box, especially a kind of position limited gear box assembly that has limit stoper.
Background technique
At present, gear-box only has speed changing function mostly, not the position-limit mechanism that cooperates with it.When needs carry out when spacing moving element, usually at the two ends of moving element movement travel the electronic limit switch is installed respectively, when moving element touches the electronic limit switch, get an electric shock and disconnect in the inside of electronic limit switch, send signal to control circuit and disconnect drive motor, thereby reach spacing purpose.Yet,, therefore, come spacing moving element will cause hysteresis by the monitoring moving parts, thereby can't realize the accurate location of transmission because the power of drive motor generally passes to moving element by driving mechanisms such as retarders.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of position limited gear box assembly, to realize the accurate location of transmission.
In order to address the above problem, position limited gear box assembly of the present utility model, comprise gearbox, this gearbox is provided with input shaft and output shaft, on described input shaft, be provided with outside thread, and on this input shaft, being set with sliding sleeve, the internal thread of this sliding sleeve and the outside thread screw-thread fit on the input shaft are connected with mounting plate by the electronic control bar perpendicular to input shaft on this sliding sleeve; This mounting plate is arranged on the casing of described gearbox and is parallel with input shaft, is provided with the saturating groove of guiding at this mounting plate upper edge input shaft, and an end of described electronic control bar is arranged in this groove that leads; Be positioned on the mounting plate at guiding saturating groove two ends and be respectively equipped with first limit switch and second limit switch, when the electronic control bar when input shaft moves up and down, guiding optionally contacts with first limit switch or second limit switch.
During work, drive motor drives input shaft and rotates, and is exported by output shaft after the gearbox speed change.Meanwhile, the electronic control bar moves up and down along input shaft, when needs are positioned moving element for certain when a bit, sends signal and makes the controlled disconnection of limit switch inner contact; When the electronic control bar does not receive positioning instruction between two limit switches, then can after running to the other end, an end touch the electronic limit switch, and then break contact, realize that the range of moving element is spacing.Because the free travel distance between electronic control bar and the electronic limit switch, become a fixed ratio with the stroke of moving element, therefore, the stroke distances that the movement travel distance by spacing electronic control bar can spacing moving element has realized the accurate location to moving element.
In the technique scheme, described first and second limit switch is installed in respectively on two arms of " U " shape fitting seat, and described electronic control bar is positioned at the opening of fitting seat; Be provided with bar hole abreast with the saturating groove of described guiding on described fitting seat, described fitting seat on mounting plate, is adjusted the position of fitting seat by the screw of passing this bar hole with convenience.
As the preferred embodiment of technique scheme, described input shaft is provided with outside thread away from an end of gearbox, is provided with external splines at the end near gearbox.
As the preferred embodiment of technique scheme, described output shaft is cylindrical away from an end of gearbox, and remaining part is a hexagon.
Compared with prior art, the beneficial effects of the utility model are: the utility model carries out spacing by the electronic limit switch to the movement travel that is located at the electronic control bar on the gearbox input shaft, realize the movement travel of moving element is carried out spacing, reached the accurate location of transmission; The utility model also has advantage of simple structure simultaneously.
Further the utility model is illustrated below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the utility model embodiment's a plan view;
Fig. 2 is the right elevation of Fig. 1;
Fig. 3 is the left view of Fig. 1.
Embodiment
As shown in Figures 1 to 3, for being installed in the position limited gear box assembly on the hospital bed, mainly form by gearbox 1, mounting plate 4, first limit switch 6, second limit switch 7 and electronic control bar 8, on gearbox 1, be provided with input shaft 3 and output shaft 2, this input shaft 3 is provided with outside thread away from an end of gearbox 1, is provided with external splines 3a at the end near gearbox 1.Be set with sliding sleeve 9 on input shaft 3, the outside thread screw-thread fit on the internal thread of this sliding sleeve 9 and the input shaft 3 drives electronic control bar 8 and moves up and down along input shaft 3 when input shaft 3 rotates.On this sliding sleeve 9, be provided with electronic control bar 8 perpendicular to input shaft 3.
Near being provided with external splines 3a on the input shaft 3 of gearbox 1, the power of drive motor by this external splines 3a with dynamic action in input shaft, rotate thereby drive input shaft.Described output shaft 2 is cylindrical away from an end of gearbox 1, and remaining part is a hexagon.
The working principle of position limited gear box assembly is: drive motor drives input shaft 3 by external splines 3a and rotates, and by output shaft 2 outputs, drives the steel band of medical berth after gearbox 1 speed change, thereby drives the lifting of berth.Meanwhile, electronic control bar 8 moves up and down along input shaft 3, when needs are positioned berth for certain when a bit, sends signal and makes the controlled disconnection of limit switch inner contact, thereby drive motor is stopped; When electronic control bar 8 does not receive positioning instruction between two limit switches 6,7, then can after running to the other end, an end touch the electronic limit switch, and then break contact, realize that the range of berth is spacing.
Claims (4)
1. position limited gear box assembly, comprise gearbox (1), this gearbox (1) is provided with input shaft (3) and output shaft (2), it is characterized in that: on described input shaft (3), be provided with outside thread, and on this input shaft (3), be set with sliding sleeve (9), outside thread screw-thread fit on internal thread of this sliding sleeve (9) and the input shaft (3) goes up the electronic control bar (8) that passes through perpendicular to input shaft (3) at this sliding sleeve (9) and is connected with mounting plate (4); This mounting plate (4) is arranged on the casing of described gearbox (1) and is parallel with input shaft (3), is provided with guiding saturating groove (4a) at this mounting plate (4) upper edge input shaft (3), and an end of described electronic control bar (8) is arranged in this groove that leads (4a); Be positioned on the mounting plate (4) at guiding saturating groove (4a) two ends and be respectively equipped with first limit switch (6) and second limit switch (7), when electronic control bar (8) along input shaft (3) when moving up and down, electronic control bar (8) optionally contacts with first limit switch (6) or second limit switch (7).
2. position limited gear box assembly according to claim 1 is characterized in that: described first and second limit switch (6,7) is installed in respectively on two arms of " U " shape fitting seat (5), and described electronic control bar (8) is positioned at the opening of fitting seat (5); Go up with the saturating groove of described guiding (4a) at described fitting seat (5) and to be provided with bar hole (4b) abreast, described fitting seat (5) by the screw of passing this bar hole (4b) on mounting plate (4).
3. position limited gear box assembly according to claim 1 is characterized in that: described input shaft (3) is provided with outside thread away from an end of gearbox (1), is provided with external splines (3a) at the end near gearbox (1).
4. position limited gear box assembly according to claim 1 is characterized in that: described output shaft (2) is cylindrical away from an end of gearbox (1), and remaining part is a hexagon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920126900U CN201373088Y (en) | 2009-04-02 | 2009-04-02 | Limit gear box assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920126900U CN201373088Y (en) | 2009-04-02 | 2009-04-02 | Limit gear box assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201373088Y true CN201373088Y (en) | 2009-12-30 |
Family
ID=41499169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920126900U Expired - Fee Related CN201373088Y (en) | 2009-04-02 | 2009-04-02 | Limit gear box assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201373088Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485312A (en) * | 2016-01-21 | 2016-04-13 | 李晓亮 | Herringbone gear transmission mechanism of gearbox |
-
2009
- 2009-04-02 CN CN200920126900U patent/CN201373088Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485312A (en) * | 2016-01-21 | 2016-04-13 | 李晓亮 | Herringbone gear transmission mechanism of gearbox |
| CN105485312B (en) * | 2016-01-21 | 2017-10-10 | 李晓亮 | A kind of double helical spurgear transmission mechanism of gearbox |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091230 Termination date: 20130402 |