CN204553738U - Backboard elevating screw - Google Patents
Backboard elevating screw Download PDFInfo
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- CN204553738U CN204553738U CN201520117494.1U CN201520117494U CN204553738U CN 204553738 U CN204553738 U CN 204553738U CN 201520117494 U CN201520117494 U CN 201520117494U CN 204553738 U CN204553738 U CN 204553738U
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Abstract
The utility model provides a kind of backboard elevating screw, belongs to transmission device field, comprises screw mandrel body.Screw mandrel body is provided with feed screw nut and nut fixed stop, and feed screw nut is provided with position limiting slide block.Rotary screw rod body, feed screw nut can move on screw mandrel body, and after feed screw nut contacts with nut fixed stop, feed screw nut stops on screw mandrel body and moves under the effect of nut fixed stop, and feed screw nut rotates relative to position limiting slide block.The backboard elevating screw that the utility model provides has skidding function, can prevent screw mandrel body from stuck or dislocation phenomenon occurring, make operation more safe and reliable, and during rotary screw rod body, power transmission is stablized, and can not produce noise, can not impact patient, there is provided a good rehabilitation environment to patient, patient is fully recovered sooner.
Description
Technical field
The utility model relates to transmission device field, in particular to a kind of backboard elevating screw.
Background technique
Screw mandrel is the transmission device that mechanical field and other field are conventional, and existing screw structure is simple, and transmission effectiveness comparison is unstable.
Monitoring sick bed is one of conventional equipment of medical industry, for patient recuperate or treatment time.Monitoring sick bed generally comprises the head of a bed, tailstock, bedstead and bed board.Bed board generally includes backboard, podical plate, leg plate and sole, plays a supportive role respectively to the back of patient, buttocks, leg and foot.In actual use, when backboard keeps flat, patient can lie low on monitoring sick bed, the angle of inclination of adjustment backboard, and the backboard making patient lean against inclination is sat up, and can have a rest, read and read newspaper or feed etc.
Existing for regulating the backboard elevating screw of inclined back plate angle, its spring easily lost efficacy; When turning to limit position, easily there is stuck or dislocation phenomenon in screw mandrel; And when rotating backboard elevating screw, noise is comparatively large, impacts patient.
Model utility content
The utility model provides a kind of backboard elevating screw, is intended to improve the problems referred to above.
The utility model is achieved in that
A kind of backboard elevating screw comprises screw mandrel body;
Described screw mandrel body is provided with feed screw nut and nut fixed stop, and described feed screw nut is provided with position limiting slide block;
Rotate described screw mandrel body, described feed screw nut can move on described screw mandrel body, after described feed screw nut contacts with described nut fixed stop, described feed screw nut stops on described screw mandrel body and moves under the effect of described nut fixed stop, and described feed screw nut rotates relative to described position limiting slide block.
Further, described position limiting slide block comprises screw mandrel jump ring and slider body, and the internal surface of described slider body is the cambered surface of mating with the outer surface of described feed screw nut.
Described screw mandrel jump ring and described slider body clamping, and be located at the outside of described screw mandrel sleeve.The position limiting slide block of this shape and structure, owing to being fixed on described screw mandrel sleeve, will inevitably along with described screw mandrel sleeve synchronizing moving or static during work; In addition, by the elastic acting force of described screw mandrel jump ring, described slider body can continuously and effectively with described feed screw nut's close contact, make frictional force therebetween comparatively suitable.
Further, described slider body is two, is relatively located on described screw mandrel jump ring, and the forward surface of two described slider body is the cambered surface of mating with the outer surface of described feed screw nut.
Two described slider body are set, and be relatively located on described screw mandrel jump ring, described feed screw nut is clamped by frictional force by two described slider body well, makes described feed screw nut drive described screw mandrel sleeve by the frictional force between itself and described position limiting slide block better.
Further, also comprise screw mandrel sleeve, described screw mandrel sleeve is connected with described feed screw nut by described position limiting slide block.By arranging described screw mandrel sleeve, can well described screw mandrel body be connected with backboard.
Further, the end of described screw mandrel body is provided with screw mandrel guiding device, and described screw mandrel guiding device and described screw mandrel sleeve are slidably connected.
Screw mandrel body and the stable nothing of described screw mandrel sleeve described in backboard lifting process are rocked, and operator is more laborsaving.
Further, described screw mandrel guiding device comprises the guide holder being fixed on described screw mandrel body end, is provided with at least three balls in described guide holder, described ball radially extend described guide holder and with the contact internal walls of described screw mandrel sleeve.
Described screw mandrel guiding device is by the described ball in described guide holder, the radial deflection between described screw mandrel body and described screw mandrel sleeve can be limited better, and rolled by described ball, make between described screw mandrel body and described screw mandrel sleeve move axially more smooth and easy.Therefore the stable transmission between described screw mandrel body and described screw mandrel sleeve is without rocking, and operator is more laborsaving.
Further, one end of described screw mandrel sleeve is provided with backboard assembly department.By described backboard assembly department, described screw mandrel sleeve can be installed on backboard, realize described screw mandrel sleeve and drive backboard lifting.
Further, also comprise bearing support, described bearing support is arranged at described nut fixed stop one end away from described feed screw nut, is provided with thrust-bearing in described bearing support, and described thrust-bearing is enclosed within described screw mandrel body.
By arranging described bearing support, and described thrust-bearing is set in described bearing support, it is more smooth and easy that described thrust-bearing makes described screw mandrel body rotate, and when described feed screw nut contacts with described nut fixed stop, described thrust-bearing can bear described feed screw nut and transmit the end thrust come, and then guarantees that described feed screw nut can be skidded further.
Further, one end of described screw mandrel body is provided with rotary driving part.By described rotary driving part, described screw mandrel body can be driven to rotate.
Further, described rotary driving part comprises the connecting rod of shaking the hand be connected with screw mandrel body, described in the shake the hand free end of connecting rod be provided with body of shaking the hand;
Described body of shaking the hand comprises the first rocking bar, the second rocking bar and the 3rd rocking bar, described first rocker sleeve be located at described in shake the hand connecting rod outside, described first rocking bar is provided with the groove that can hold described second rocking bar;
Described second rocking bar is connected with described connecting rod of shaking the hand by flexible rod, rotate described second rocking bar can drive described in shake the hand link rotatable, be provided with the groove that can hold described 3rd rocking bar in described second rocking bar;
Described 3rd rocking bar and described second rocking bar hinged.
Described first rocking bar is fixed on the equipment of this backboard elevating screw of use, respectively described second rocking bar is connected in the groove of described first rocking bar, by described 3rd rocking bar and is connected in the groove of described second rocking bar.During use, extract described second rocking bar and described 3rd rocking bar, rotate described 3rd rocking bar can drive described second rocking bar, described in shake the hand link rotatable, and then drive described screw mandrel body to rotate.
The beneficial effects of the utility model are: the backboard elevating screw that the utility model is obtained by above-mentioned design, during use, rotary screw rod body, feed screw nut drives screw mandrel sleeve, after feed screw nut contacts with nut fixed stop, feed screw nut stops on screw mandrel body and moves under the effect of nut fixed stop, and feed screw nut rotates relative to position limiting slide block, now skid between feed screw nut and position limiting slide block, this backboard elevating screw has skidding function thus, can prevent screw mandrel body from stuck or dislocation phenomenon occurring, make operation more safe and reliable, and during rotary screw rod body, power transmission is stablized, noise can not be produced, can not impact patient, a good rehabilitation environment is provided to patient, patient is fully recovered sooner.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme of the utility model embodiment, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present utility model, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the backboard elevating screw that the first embodiment provides;
Fig. 2 is the structural representation of the backboard elevating screw that the second embodiment provides;
Fig. 3 is the cutting structural representation of the backboard elevating screw that the second embodiment provides;
Fig. 4 is the structural representation of the feed screw nut of the backboard elevating screw that the second embodiment provides;
Fig. 5 is the structural representation of the position limiting slide block of the backboard elevating screw that the second embodiment provides;
Fig. 6 is the structural representation of the screw mandrel guiding device of the backboard elevating screw that the second embodiment provides;
Fig. 7 is the structural representation of the rotary driving part of the backboard elevating screw that the second embodiment provides.
Figure acceptance of the bid note is respectively:
Screw mandrel body 101; Screw mandrel sleeve 102; Feed screw nut 103; Nut fixed stop 104; Position limiting slide block 105; Screw mandrel jump ring 106; Slider body 107; Locating aperture pin 108; Guide holder 109; Ball 110; Bearing support 111; Thrust-bearing 112; To shake the hand connecting rod 113; First rocking bar 114; Second rocking bar 115; 3rd rocking bar 116; Backboard assembly department 117; Shrouding 118; Screw guide sleeve 119; Sleeve pipe close 120; Screw mandrel dust-proof cover 121; Bearing positive stop 122.
Embodiment
Screw mandrel is the transmission device that mechanical field and other field are conventional, and existing screw structure is simple, and transmission effectiveness comparison is unstable.
Monitoring sick bed is one of conventional equipment of medical industry, for patient recuperate or treatment time.Monitoring sick bed generally comprises the head of a bed, tailstock, bedstead and bed board.Bed board generally includes backboard, podical plate, leg plate and sole, plays a supportive role respectively to the back of patient, buttocks, leg and foot.In actual use, when backboard keeps flat, patient can lie low on monitoring sick bed, the angle of inclination of adjustment backboard, and the backboard making patient lean against inclination is sat up, and can have a rest, read and read newspaper or feed etc.
Existing for regulating the backboard elevating screw of inclined back plate angle, its spring easily lost efficacy; When turning to limit position, easily there is stuck or dislocation phenomenon in screw mandrel; And when rotating backboard elevating screw, noise is comparatively large, impacts patient.
Those skilled in the art are seeking a kind of instrument or the method for improving this problem for a long time always.
Given this, artificer of the present utility model is by long-term exploration and trial, and experiment repeatedly and effort, continuous reform and innovation, design a kind of backboard elevating screw with skidding function, after feed screw nut 103 contacts with nut fixed stop 104, feed screw nut 103 stops on screw mandrel body 101 and moves under the effect of nut fixed stop 104, and feed screw nut 103 rotates relative to position limiting slide block 105, now skid between feed screw nut 103 and position limiting slide block 105.This backboard elevating screw has skidding function, can prevent screw mandrel body 101 from stuck or dislocation phenomenon occurring, make operation more safe and reliable, and during rotary screw rod body 101, power transmission is stablized, and can not produce noise, can not impact patient, there is provided a good rehabilitation environment to patient, patient is fully recovered sooner.
For making the object of the utility model embodiment, technological scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.Therefore, below to the detailed description of the embodiment of the present utility model provided in the accompanying drawings and the claimed scope of the present utility model of not intended to be limiting, but selected embodiment of the present utility model is only represented.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
First embodiment
Fig. 1 is the structural representation of the backboard elevating screw that the first embodiment provides; Refer to Fig. 1, the backboard elevating screw that the present embodiment provides, be mainly used in guarding lifting sick bed controlling backboard.This backboard elevating screw comprises screw mandrel body 101 and screw mandrel sleeve 102.Screw mandrel body 101 is provided with feed screw nut 103 and nut fixed stop 104, and feed screw nut 103 is connected with screw mandrel sleeve 102 by position limiting slide block 105.Rotary screw rod body 101, feed screw nut 103 can drive screw mandrel sleeve 102 to move on screw mandrel body 101 together, after feed screw nut 103 contacts with nut fixed stop 104, feed screw nut 103 stops on screw mandrel body 101 and moves under the effect of nut fixed stop 104, and feed screw nut 103 rotates relative to position limiting slide block 105.Screw mandrel sleeve 102 plays the effect that miscellaneous part is connected with screw mandrel body 101, and other link also can be adopted to replace, or without screw mandrel sleeve 102, and feed screw nut 103 is directly connected with miscellaneous part.
The backboard elevating screw that the present embodiment provides, during use, rotary screw rod body 101, feed screw nut 103 drives screw mandrel sleeve 102, after feed screw nut 103 contacts with nut fixed stop 104, feed screw nut 103 stops on screw mandrel body 101 and moves under the effect of nut fixed stop 104, and feed screw nut 103 rotates relative to position limiting slide block 105, now skid between feed screw nut 103 and position limiting slide block 105, this backboard elevating screw has skidding function thus, can prevent screw mandrel body 101 from stuck or dislocation phenomenon occurring, make operation more safe and reliable, and during rotary screw rod body 101, power transmission is stablized, noise can not be produced, can not impact patient, a good rehabilitation environment is provided to patient, patient is fully recovered sooner.
Some are lacked experience or the user of general knowledge can continue rotary screw body 101 excessively, when forwarding limit position to, can produce larger noise.By this skidding design, can prevent screw mandrel body 101 from stuck or dislocation phenomenon occurring when lasting rotation, can not noise be produced during rotation, longer service life.
Second embodiment
Fig. 2 is the structural representation of the backboard elevating screw that the second embodiment provides; Fig. 3 is the cutting structural representation of the backboard elevating screw that the second embodiment provides; Refer to Fig. 2 and Fig. 3, the backboard elevating screw that the present embodiment provides, its basic structure is identical with the first embodiment with the technique effect of principle and generation, is concise and to the point description, and the not mentioned part of the present embodiment part, can with reference to corresponding contents in the first embodiment.
Refer to Fig. 2, in the present embodiment, as preferably, nut fixed stop 104 is two, is arranged at the two ends of screw mandrel body 101 respectively, when can ensure that this backboard elevating screw is elongated to the longest or shorten to the most in short-term, feed screw nut 103 all can contact with nut fixed stop 104, then be rotated further screw mandrel body 101, then this backboard elevating screw is in slipping state, ensures all to prevent stuck or dislocation phenomenon when two limit positions.
Fig. 4 is the structural representation of the feed screw nut 103 of the backboard elevating screw that the second embodiment provides; Fig. 5 is the structural representation of the position limiting slide block 105 of the backboard elevating screw that the second embodiment provides; Refer to Fig. 2, Fig. 4 and Fig. 5, position limiting slide block 105 comprises screw mandrel jump ring 106 and slider body 107, and the internal surface of slider body 107 is the cambered surface of mating with the outer surface of feed screw nut 103.Screw mandrel jump ring 106 and slider body 107 clamping, and be located at the outside of screw mandrel sleeve 102.Screw mandrel sleeve 102 is provided with through hole in the position of corresponding slider body 107, be connected with screw mandrel jump ring 106 outside slider body 107, stretch into the inside of screw mandrel sleeve 102 inside slider body 107, slider body 107 is positioned at through hole and can through hole moving radially along screw mandrel jump ring 106.
Rely on the fastening force of screw mandrel jump ring 106, make slider body 107 clamping screw nut 103, therebetween frictional force makes slider body 107 and feed screw nut 103 when normal working, can not relatively rotate, namely feed screw nut 103 drives slider body 107, and then drives screw mandrel sleeve 102 and screw mandrel body 101 to move axially.After feed screw nut 103 contacts with nut fixed stop 104, feed screw nut 103 is under the effect of nut fixed stop 104, overcome the frictional force between feed screw nut 103 and slider body 107, feed screw nut 103 is stopped on screw mandrel body 101 move, and feed screw nut 103 rotates relative to slider body 107, now skid between feed screw nut 103 and slider body 107.
Can along with screw mandrel sleeve 102 synchronizing moving or static when position limiting slide block 105 works; In addition, by the elastic acting force of screw mandrel jump ring 106, slider body 107 can continuously and effectively with feed screw nut 103 close contact, make frictional force therebetween comparatively suitable.
As preferably, position limiting slide block 105 is two, is arranged at the two ends of feed screw nut 103 respectively, and the diameter at the two ends of feed screw nut 103 is less than its mid diameter, defines the installation position of position limiting slide block 105, improves gearing and the slipping effect of structure.
As preferably, the slider body 107 on each position limiting slide block 105 is two, is relatively located on screw mandrel jump ring 106, and the forward surface of two slider body 107 is the cambered surface of mating with the outer surface of feed screw nut 103.
By arranging two slider body 107, and be relatively located on screw mandrel jump ring 106, feed screw nut 103 can be clamped by frictional force by two slider body 107 well, make feed screw nut 103 drive screw mandrel sleeve 102 by the frictional force between itself and position limiting slide block 105 better.
Refer to Fig. 2, nut fixed stop 104 is connected by locating aperture pin 108 with screw mandrel body 101.By arranging locating aperture pin 108, nut fixed stop 104 is fixed on screw mandrel body 101, enhance the axially loaded of nut fixed stop 104 and the steadiness of structure, after feed screw nut 103 contacts with nut fixed stop 104, nut fixed stop 104 can play a role better, feed screw nut 103 is stopped on screw mandrel body 101 move, and feed screw nut 103 rotates relative to position limiting slide block 105.
Fig. 6 is the structural representation of the screw mandrel guiding device of the backboard elevating screw that the second embodiment provides; Refer to Fig. 2, Fig. 3 and Fig. 6, the end of screw mandrel body 101 is provided with screw mandrel guiding device, and screw mandrel guiding device and screw mandrel sleeve 102 are slidably connected.Screw mandrel body 101 and the stable nothing of screw mandrel sleeve 102 in backboard lifting process are rocked, and operator is more laborsaving.
Screw mandrel guiding device comprises the guide holder 109 being fixed on screw mandrel body 101 end, is provided with at least three balls 110 in guide holder 109, and the present embodiment is three balls 110.Ball 110 radially extend guide holder 109 and with the contact internal walls of screw mandrel sleeve 102.The side of guide holder 109 is also provided with shrouding 118, is bolted between guide holder 109 and shrouding 118, and guide holder 109 is provided with the recess placing ball 110 for correspondence, ball 110 is clamped in recess by shrouding 118.In the present embodiment, for making compact structure, transmission is more smooth and easy, guide holder 109 be positioned at the nut fixed stop 104 of screw mandrel body 101 with one end and be connected.
Screw mandrel guiding device is by the ball 110 in guide holder 109, the radial deflection between screw mandrel body 101 and screw mandrel sleeve 102 can be limited better, and rolled by ball 110, make between screw mandrel body 101 and screw mandrel sleeve 102 move axially more smooth and easy.Therefore the stable transmission between screw mandrel body 101 and screw mandrel sleeve 102 is without rocking, and operator is more laborsaving.
Refer to Fig. 2 and Fig. 3, this backboard elevating screw also comprises bearing support 111, and bearing support 111 is arranged at nut fixed stop 104 one end away from feed screw nut 103, is provided with thrust-bearing 112 in bearing support 111, and thrust-bearing 112 is enclosed within screw mandrel body 101.As preferably, bearing support 111 is cambered surface aluminium seat, and thrust-bearing 112 is two, is arranged at the two ends of bearing support 111 respectively.Bearing support 111 is also provided with bearing positive stop 122 away from one end of nut fixed stop 104, and in the present embodiment, the structure of bearing positive stop 122 is identical with nut fixed stop 104 structure, and all with locating aperture pin 108.
By arranging bearing support 111, and thrust-bearing 112 is set in bearing support 111, it is more smooth and easy that thrust-bearing 112 makes screw mandrel body 101 rotate, and when feed screw nut 103 contacts with nut fixed stop 104, thrust-bearing 112 can bear feed screw nut 103 and transmit the end thrust of coming, and then guarantees that feed screw nut 103 can be skidded further.
Rotary screw rod body 101 is needed during the work of backboard elevating screw, equipment or the structure that specifically can realize screw mandrel body 101 rotation are varied, preferably, design like this in the present embodiment: Fig. 7 is the structural representation of the rotary driving part of the backboard elevating screw that the second embodiment provides; Refer to Fig. 7, one end of screw mandrel body 101 is provided with rotary driving part.By rotary driving part, screw mandrel body 101 can be driven to rotate.
Particularly, rotary driving part comprises the connecting rod 113 of shaking the hand be connected with screw mandrel body 101, and the free end of connecting rod 113 of shaking the hand is provided with body of shaking the hand.Body of shaking the hand comprises the first rocking bar 114, second rocking bar 115 and the 3rd rocking bar 116, first rocking bar 114 is sheathed on connecting rod 113 outside of shaking the hand, and the first rocking bar 114 is provided with the groove that can hold the second rocking bar 115.Second rocking bar 115 is connected with connecting rod 113 of shaking the hand by flexible rod, rotates the second rocking bar 115 and connecting rod 113 of shaking the hand can be driven to rotate, be provided with the groove that can hold the 3rd rocking bar 116 in the second rocking bar 115.3rd rocking bar 116 and the second rocking bar 115 hinged.
First rocking bar 114 is fixed on the equipment of this backboard elevating screw of use, respectively the second rocking bar 115 is connected in the groove of the first rocking bar 114, the 3rd rocking bar 116 is connected in the groove of the second rocking bar 115.During use, extract the second rocking bar 115 and the 3rd rocking bar 116, rotate that the 3rd rocking bar 116 can drive the second rocking bar 115, connecting rod 113 of shaking the hand rotates, and then drive screw mandrel body 101 to rotate.
Concrete, the first rocking bar 114 of rotary driving part can be fixed on monitoring sick bed, in the corresponding recesses the second rocking bar 115 and the 3rd rocking bar 116 fixed respectively, can prevent it from colliding passing crowd, also can prevent rotary driving part from being misrouted when not using.
Rotary driving part can be not only above-mentioned Manual structure, also can be electric pushrod or other electric structures, this backboard elevating screw can be made convenient by the electronic rotation realizing screw mandrel body 101.
One end of screw mandrel sleeve 102 is provided with backboard assembly department 117.By backboard assembly department 117, screw mandrel sleeve 102 can be installed on backboard, realize screw mandrel sleeve 102 and drive backboard to be elevated.As preferably, backboard assembly department 117 is connected by screw with backboard, backboard assembly department 117 is relatively provided with two screw guide sleeves 119, the mounting point of restriction screw, installs serve leading role to screw.
Screw mandrel sleeve 102 is also provided with sleeve pipe close 120 near one end of backboard assembly department 117, can, by the closure of openings of this end, avoid foreign material to enter from this end, and impact uses.
The outside cover of screw mandrel sleeve 102 has screw mandrel dust-proof cover 121, can prevent dust or other tiny foreign material from entering screw mandrel sleeve 102, avoids long-time use cause dust accumulation and affect normal use.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the equipment of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In description of the present utility model, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature immediately below second feature and tiltedly below, or only represent that fisrt feature level height is less than second feature.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a backboard elevating screw, is characterized in that, comprises screw mandrel body;
Described screw mandrel body is provided with feed screw nut and nut fixed stop, and described feed screw nut is provided with position limiting slide block;
Rotate described screw mandrel body, described feed screw nut can move on described screw mandrel body, after described feed screw nut contacts with described nut fixed stop, described feed screw nut stops on described screw mandrel body and moves under the effect of described nut fixed stop, and described feed screw nut rotates relative to described position limiting slide block.
2. backboard elevating screw according to claim 1, is characterized in that, described position limiting slide block comprises screw mandrel jump ring and slider body, and the internal surface of described slider body is the cambered surface of mating with the outer surface of described feed screw nut.
3. backboard elevating screw according to claim 2, is characterized in that, described slider body is two, is relatively located on described screw mandrel jump ring, and the forward surface of two described slider body is the cambered surface of mating with the outer surface of described feed screw nut.
4. backboard elevating screw according to claim 1, is characterized in that, also comprises screw mandrel sleeve, and described screw mandrel sleeve is connected with described feed screw nut by described position limiting slide block.
5. backboard elevating screw according to claim 4, is characterized in that, the end of described screw mandrel body is provided with screw mandrel guiding device, and described screw mandrel guiding device and described screw mandrel sleeve are slidably connected.
6. backboard elevating screw according to claim 5, it is characterized in that, described screw mandrel guiding device comprises the guide holder being fixed on described screw mandrel body end, be provided with at least three balls in described guide holder, described ball radially extend described guide holder and with the contact internal walls of described screw mandrel sleeve.
7. backboard elevating screw according to claim 6, is characterized in that, one end of described screw mandrel sleeve is provided with backboard assembly department.
8. backboard elevating screw according to claim 1, it is characterized in that, also comprise bearing support, described bearing support is arranged at described nut fixed stop one end away from described feed screw nut, be provided with thrust-bearing in described bearing support, described thrust-bearing is enclosed within described screw mandrel body.
9. backboard elevating screw according to claim 1, is characterized in that, one end of described screw mandrel body is provided with rotary driving part.
10. backboard elevating screw according to claim 9, is characterized in that, described rotary driving part comprises the connecting rod of shaking the hand be connected with screw mandrel body, described in the shake the hand free end of connecting rod be provided with body of shaking the hand;
Described body of shaking the hand comprises the first rocking bar, the second rocking bar and the 3rd rocking bar, described first rocker sleeve be located at described in shake the hand connecting rod outside, described first rocking bar is provided with the groove that can hold described second rocking bar;
Described second rocking bar is connected with described connecting rod of shaking the hand by flexible rod, rotate described second rocking bar can drive described in shake the hand link rotatable, be provided with the groove that can hold described 3rd rocking bar in described second rocking bar;
Described 3rd rocking bar and described second rocking bar hinged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520117494.1U CN204553738U (en) | 2015-02-27 | 2015-02-27 | Backboard elevating screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520117494.1U CN204553738U (en) | 2015-02-27 | 2015-02-27 | Backboard elevating screw |
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| Publication Number | Publication Date |
|---|---|
| CN204553738U true CN204553738U (en) | 2015-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520117494.1U Active CN204553738U (en) | 2015-02-27 | 2015-02-27 | Backboard elevating screw |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106808284A (en) * | 2015-12-01 | 2017-06-09 | 安徽鸿远机电科技有限公司 | A kind of drilling and milling machine elevating screw |
| CN112879517A (en) * | 2021-01-20 | 2021-06-01 | 北京精密机电控制设备研究所 | Lead screw supporting and limiting structure |
-
2015
- 2015-02-27 CN CN201520117494.1U patent/CN204553738U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106808284A (en) * | 2015-12-01 | 2017-06-09 | 安徽鸿远机电科技有限公司 | A kind of drilling and milling machine elevating screw |
| CN112879517A (en) * | 2021-01-20 | 2021-06-01 | 北京精密机电控制设备研究所 | Lead screw supporting and limiting structure |
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