CN203257939U - Novel automobile tailboard brake mechanism - Google Patents
Novel automobile tailboard brake mechanism Download PDFInfo
- Publication number
- CN203257939U CN203257939U CN 201320157596 CN201320157596U CN203257939U CN 203257939 U CN203257939 U CN 203257939U CN 201320157596 CN201320157596 CN 201320157596 CN 201320157596 U CN201320157596 U CN 201320157596U CN 203257939 U CN203257939 U CN 203257939U
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- Prior art keywords
- guide rail
- brake cam
- brake
- cam
- spring
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Abstract
The utility model relates to a novel automobile tailboard brake mechanism. The novel automobile tailboard brake mechanism comprises a fixing plate, a transmission gear, a brake cam and a guide rail. A through hole is formed in the fixing plate, and the transmission gear and the brake cam are sequentially arranged inside the through hole and are connected to the fixing plate through shaft pins. A pawl and a spring are arranged between the transmission gear and the brake cam. The pawl is in an arc shape, and comprises a hinged end and a swinging end, wherein the hinged end is hinged to the transmission gear through shaft pins, the swinging end is connected with one end of the spring, and the other end of the spring is fixed on the brake cam. The guide rail is provided with a guide rail rack which is fixedly connected with the guide rail through bolts and is meshed with the transmission gear. By means of the brake mechanism, the brake mechanism with the brake cam meshed with the guide rail rack is designed, the pawl overcomes the tension of the spring to swing outwards under the centrifugal action, the brake cam is driven to rotate to enable the brake cam to be meshed with the rack, and braking is achieved.
Description
Technical field
The utility model relates to a kind of braking mechanism, especially a kind of automobile tailboard braking mechanism.
Background technique
Two kinds of traditional brakes are arranged, and a kind of is the inclined wedge type brake.Namely as shown in Figure 1 when moving lever 3 acceleration suddenly at the volley, when acceleration reaches the value that presets, brake wheel 2 will be bound to the position of more going up with respect to guide rail 1 by spring, makes brake wheel 2 and guide rail 1 and fixed base 4 form wedge, thereby realizes brake (Fig. 1) by the sassafras that rubs.The defective of this braking mechanism is: thus be subjected to the restriction frictional force of spatial position can not be too large in a, inclined wedge type braking mechanism between brake wheel and guide rail, can not be used in the occasion of heavier load, sometimes meeting downslide one segment distance in brake process, make brake unreliable; B, repeat brake and can damage guide rail; C, be to utilize acceleration to control brake, can not effectively control the rate of descent of tailgate.
Another kind is that only chip brake adopts wire rope to be combined with locking plate to utilize the friction between propping up of locking plate and fixed guide to brake, only the chip braking mechanism exists the inclined wedge type braking mechanism can not be used in the occasion of heavier load and repeat the defective that brake can damage guide rail equally, system can not control the rate of descent of tailgate equally, only have when carrying chain to disconnect the ability positive braking more than the wire rope fixed block, the carrying chain disconnects and just causes system failure below the wire rope fixed block.
The model utility content
In view of above-mentioned condition, be necessary to provide a kind of and can both can control accurately rate of descent, can bear larger load again, the in time reliable tailgate braking mechanism of brake.
For solving the problems of the technologies described above, a kind of new automobile tailgate braking mechanism is provided, comprise fixed plate, driving gear, brake cam and guide rail, have through hole on this fixed plate, this driving gear and this brake cam are located in this through hole successively, and are connected in this fixed plate by pivot pin, and this driving gear and this brake cam can rotate centered by this pivot pin; Also be provided with ratchet and spring between this driving gear and this brake cam, this ratchet is curved, include rounded end and swinging end, this rounded end is by hinged this driving gear of pivot pin, this ratchet can be by rotating centered by this pivot pin, this swinging end is connected with this spring one end, and the other end of this spring is fixed on this brake cam; This guide rail and this fixed plate be arranged in parallel, and this guide rail is provided with the guide rail tooth bar, and this guide rail tooth bar is fixedly connected with this guide rail by bolt, this guide rail tooth bar and the engagement of this driving gear.
The swinging end of this ratchet and this spring joint are provided with position limit pin, and this position limit pin is used for overcoming this spring to the pulling force effect of this swinging end, rotates thereby limit this ratchet.
The periphery of this brake cam is fixed with cam rack, and this cam rack is along with the rotation of this brake cam can be meshed with this guide rail tooth bar.
The edge of this brake cam one end outwards is extruded with a fin, and this fin turns in certain limit with this brake cam, can be superimposed with this fixed plate.
Be provided with retaining plate in the through hole of this fixed plate, to be an integral slab form by secondary bending 90 degree this retaining plate, and this retaining plate one end contacts with cam rack on this brake cam, and the other end is fixed on this fixed plate.
Above-mentioned braking mechanism, braking mechanism to be designed to the braking mechanism of cam and tooth bar engagement, overcoming spring tension by ratchet under the effect of centrifugal force outwards swings, through calculating the relation of rate of descent and centrifugal force, when reaching predetermined rate of descent maximum value at tailgate, ratchet overcomes spring tension and outwards swings under the effect of centrifugal force, can drive the brake cam rotation and make brake cam and tooth bar engagement realize brake.
The braking mechanism of this programme both can be controlled accurately rate of descent, and can bear larger load, and brake is in time reliable.
Description of drawings
Fig. 1 is prior art inclined wedge type brake structure schematic diagram.
Fig. 2 is the plan view of the utility model embodiment new automobile tailgate braking mechanism during without guide rail and guide rail tooth bar.
Fig. 3 is the side view of the utility model embodiment new automobile tailgate braking mechanism.
Fig. 4 is the side view of the utility model embodiment new automobile tailgate braking mechanism side view during without driving gear.
Fig. 5 is brake cam, retaining plate and the pawl structures schematic diagram of the utility model embodiment new automobile tailgate braking mechanism.
Wherein: 1, guide rail; 2, brake wheel; 3, moving lever; 4, fixed base;
10, fixed plate; 20, driving gear;
30, ratchet; 32, rounded end; 34, swinging end;
40, spring; 50, brake cam; 52, cam rack; 54, fin;
60, guide rail; 62, guide rail tooth bar; 70, retaining plate; 80, position limit pin.
Embodiment
Below in conjunction with drawings and Examples, new automobile tailgate braking mechanism of the present utility model is described in further detail.
See also Fig. 2 to shown in Figure 5, a kind of new automobile tailgate of the utility model embodiment braking mechanism, comprise fixed plate 10, driving gear 20, brake cam 50 and guide rail 60, have through hole on this fixed plate 10, this driving gear 20 and this brake cam 50 are located in this through hole successively, and are connected in this fixed plate 10 by pivot pin, and this driving gear 20 and this brake cam 50 can rotate centered by this pivot pin; Also be provided with ratchet 30 and spring 40 between this driving gear 20 and this brake cam 50, this ratchet 30 is curved, include rounded end 32 and swinging end 34, this rounded end 32 is by hinged this driving gear 20 of pivot pin, this ratchet 30 can be by rotating centered by this pivot pin, this swinging end 34 is connected with these spring 40 1 ends, and the other end of this spring 40 is fixed on this brake cam 50; This guide rail 60 be arranged in parallel with this fixed plate 10, and this guide rail 60 is provided with guide rail tooth bar 62, and this guide rail tooth bar 62 is fixedly connected with this guide rail 60 by bolt, this guide rail tooth bar 62 and these driving gear 20 engagements.
The swinging end 34 of this ratchet 30 is provided with position limit pin 80 with this spring 40 joints, and this position limit pin 80 is used for overcoming the pulling force effect of 40 pairs of these swinging ends 34 of this spring, rotates thereby limit this ratchet 40.
The periphery of this brake cam 50 is fixed with cam rack 52, and this cam rack 52 is along with the rotation of this brake cam 50 can be meshed with this guide rail tooth bar 62.
The edge of these brake cam 52 1 ends outwards is extruded with a fin 54, and this fin 54 turns in certain limit with this brake cam 50, can be superimposed with this fixed plate 10.
Be provided with retaining plate 70 in the through hole of this fixed plate 10, to be an integral slab form by secondary bending 90 degree this retaining plate 70, and these retaining plate 70 1 ends contact with cam rack 52 on this brake cam 50, and the other end is fixed on this fixed plate 10.
As shown in Fig. 2 to 5, below by following examples, describe the implementation process of automobile tailboard braking mechanism in detail:
The gear parameter of driving gear 20 is; M=2; Z=21; α=20 °;
The parameter of brake cam 50 cam tooth bars 52 is; M=2; Z=21; α=20 °;
The parameter of guide rail tooth bar 62 is; M=2; Z=21; α=20 °;
Brake pivot pin: φ=14mm; L=60mm,
The maximum falling speed of getting the permission of tailgate is 0.15m/s.
The utility model is to consist of a braking mechanism by fixed plate 10, driving gear 20, ratchet 30, spring 40, brake cam 50, retaining plate 70.When normal speed descended, driving gear 20 rotated along guide rail tooth bar 62, is subjected to the effect of spring 40 pulling force due to ratchet 30 when tailgate, all the time paste firm position limit pin 80, brake cam 50 can not rotate under Action of Gravity Field, is in not contact condition with guide rail tooth bar 62, can not form brake.Vertical tailgate is when rate of descent surpasses setting speed (0.15m/s), ratchet 30 overcomes spring 40 pulling force and outwards swings under the effect of centrifugal force, thereby the swing of ratchet 30 drives brake cam 50 and rotates counterclockwise an angle, this moment, the cam rack 52 of brake cam 50 meshed with guide rail tooth bar 62, the fin 54 and the fixed plate 10 that brake cam 50 are rotated further make on brake cam 50 laminate and close up, brake cam 50 can not be rotated further, block with guide rail tooth bar 62, thereby realize brake.
Above-mentioned braking mechanism, braking mechanism to be designed to the braking mechanism of guide rail cam 62 and 52 engagements of brake tooth bar, overcome spring 40 pulling force under the effect of centrifugal force outwards swings by ratchet 30, through calculating the relation of rate of descent and centrifugal force, when reaching predetermined rate of descent maximum value at tailgate, ratchet 30 overcomes spring 40 pulling force and outwards swings under the effect of centrifugal force, can drive brake cam 50 rotations and make brake cam 50 and 62 engagements of guide rail tooth bar realize brake.
The braking mechanism of this programme both can be controlled accurately rate of descent, and can bear larger load, and brake is in time reliable.
The above; It is only preferred embodiment of the present utility model; Be not that the utility model is done any pro forma restriction; Although the utility model discloses as above with preferred embodiment; Yet be not to limit the utility model; Any those skilled in the art; Within not breaking away from the technical solutions of the utility model scope; When the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be not break away from the technical solutions of the utility model content; Any simple modification that foundation technical spirit of the present utility model is done above embodiment; Equivalent variations and modification; All still belong in the scope of technical solutions of the utility model.
Claims (5)
1. new automobile tailgate braking mechanism, it is characterized in that: comprise fixed plate, driving gear, brake cam and guide rail, have through hole on this fixed plate, this driving gear and this brake cam are located in this through hole successively, and being connected in this fixed plate by pivot pin, this driving gear and this brake cam can rotate centered by this pivot pin; Also be provided with ratchet and spring between this driving gear and this brake cam, this ratchet is curved, include rounded end and swinging end, this rounded end is by hinged this driving gear of pivot pin, this ratchet can be by rotating centered by this pivot pin, this swinging end is connected with this spring one end, and the other end of this spring is fixed on this brake cam; This guide rail and this fixed plate be arranged in parallel, and this guide rail is provided with the guide rail tooth bar, and this guide rail tooth bar is fixedly connected with this guide rail by bolt, this guide rail tooth bar and the engagement of this driving gear.
2. new automobile tailgate braking mechanism as claimed in claim 1 is characterized in that: the swinging end of this ratchet and this spring joint are provided with position limit pin, and this position limit pin is used for overcoming this spring to the pulling force effect of this swinging end, rotates thereby limit this ratchet.
3. new automobile tailgate braking mechanism as claimed in claim 1, it is characterized in that: the periphery of this brake cam is fixed with cam rack, this cam rack along with the rotation of this brake cam can with this guide rail tooth bar engagement.
4. new automobile tailgate braking mechanism as claimed in claim 1, it is characterized in that: the edge of this brake cam one end outwards is extruded with a fin, and this fin turns in certain limit with this brake cam, can be superimposed with this fixed plate.
5. new automobile tailgate braking mechanism as claimed in claim 1, it is characterized in that: be provided with retaining plate in the through hole of this fixed plate, this retaining plate is that an integral slab forms by secondary bending 90 degree, this retaining plate one end contacts with cam rack on this brake cam, and the other end is fixed on this fixed plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320157596 CN203257939U (en) | 2013-04-01 | 2013-04-01 | Novel automobile tailboard brake mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320157596 CN203257939U (en) | 2013-04-01 | 2013-04-01 | Novel automobile tailboard brake mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203257939U true CN203257939U (en) | 2013-10-30 |
Family
ID=49470506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320157596 Expired - Fee Related CN203257939U (en) | 2013-04-01 | 2013-04-01 | Novel automobile tailboard brake mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203257939U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402288A (en) * | 2015-11-24 | 2016-03-16 | 上海新黄浦医疗器械有限公司 | Novel brake braking device |
| CN105605117A (en) * | 2016-03-22 | 2016-05-25 | 林穗强 | Transmission connector of holding clamps |
| CN114798880A (en) * | 2022-05-30 | 2022-07-29 | 昆山湘北精密金属有限公司 | Discontinuous stamping power mechanism |
-
2013
- 2013-04-01 CN CN 201320157596 patent/CN203257939U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402288A (en) * | 2015-11-24 | 2016-03-16 | 上海新黄浦医疗器械有限公司 | Novel brake braking device |
| CN105605117A (en) * | 2016-03-22 | 2016-05-25 | 林穗强 | Transmission connector of holding clamps |
| CN114798880A (en) * | 2022-05-30 | 2022-07-29 | 昆山湘北精密金属有限公司 | Discontinuous stamping power mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 Termination date: 20200401 |