CN203306060U - Trolley with external cam braking mechanism - Google Patents
Trolley with external cam braking mechanism Download PDFInfo
- Publication number
- CN203306060U CN203306060U CN2013202832395U CN201320283239U CN203306060U CN 203306060 U CN203306060 U CN 203306060U CN 2013202832395 U CN2013202832395 U CN 2013202832395U CN 201320283239 U CN201320283239 U CN 201320283239U CN 203306060 U CN203306060 U CN 203306060U
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- spring
- pipe link
- brake
- hollow tubular
- brake pipe
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Abstract
The utility model discloses a trolley with an external cam braking mechanism. The trolley comprises a trolley frame, wheels and the braking mechanism. The braking mechanism comprises a braking handle, reducing cams and brake connecting rods. The braking handle drives the reducing cams to rotate through connecting elements, the lower portions of the reducing cams are provided with bearings in contact with the reducing cams, the two ends of each reducing cam are provided with limiting grooves, the bearings are connected with sliding blocks, the tops of the brake connecting rods abut against the sliding blocks, the bottom ends of the brake connecting rods are provided with hoops, and reset springs are arranged on the brake connecting rods in a sleeved mode. The trolley frame is fixedly provided with hollow tubes, the sliding blocks, the brake connecting rods and the reset springs are arranged in the hollow tubes, one side of each hollow tube is provided with a bar-shaped hole, the end portion of each bearing penetrates through the corresponding bar-shaped hole, and the reducing cams are fixed to the outer sides of the hollow tubes through connecting screw rods. The trolley is reasonable in structural design, a user can achieve locking and releasing of the wheels by operating the braking handle with hands, and operation is simple and convenient.
Description
Technical field
The utility model relates to a kind of hand barrow, relates to specifically a kind of hand barrow with external Cam brake mechanism.
Background technology
General hand barrow for transporting cargo etc. has a vehicle frame, a plurality of wheel and braking mechanism that is arranged on bottom of frame, and braking mechanism is used for making wheel braking, to prevent whole hand barrow in the situation that be not subjected to the unexpected movement of external force generation.Existing braking mechanism adopts override type more, and the lower braking mechanism that must tramp with one's feet when wish locking wheel, must upwards pull open braking mechanism with hand when wish discharges wheel, and this operating mode can be brought inconvenience to a certain degree to the user.
The utility model content
Based on above-mentioned technical matters, the utility model provides a kind of hand barrow with external Cam brake mechanism.
Its technical solution is:
A kind of hand barrow with external Cam brake mechanism, comprise vehicle frame, wheel and braking mechanism, described braking mechanism comprises brake handgrip, diameter variable cam and brake pipe link, the brake handgrip drives the diameter variable cam rotation by attaching parts, below diameter variable cam, be provided with bearing, diameter variable cam contacts with bearing, two ends at diameter variable cam offer limited impression, bearing carrier ring is located on axle, axle is fixedly connected with slide block, and the brake pipe link vertically arranges, and its top props up slide block, bottom is provided with clip, is arranged with retracing spring on the brake pipe link; On described vehicle frame, be fixed with hollow tubular, hollow tubular vertically is arranged on the wheel top, described slide block, brake pipe link and retracing spring all are built in hollow tubular, a side at hollow tubular offers bar hole, the end of axle and bearing is from passing bar hole, described diameter variable cam is arranged on the outside of hollow tubular, and it is fixed on by connection wire rod the side that hollow tubular offers bar hole, and is positioned at the top of bar hole.
Preferably, offer guide groove in the bottom of slide block, the top of brake pipe link is inserted in guide groove.
Preferably, described retracing spring comprises spring one and spring two, spring one is arranged on the upper end of brake pipe link, the upper end of spring one is connected with the top of brake pipe link, the lower end of spring one is connected with hollow tubular, spring two is arranged on the lower end of brake pipe link, and the upper end of spring two is connected with the brake pipe link, and the lower end of spring two is connected with hollow tubular or is against on the baffle plate of hollow tubular below setting.
Preferably, described vehicle frame comprises left gear frame, right gear frame and backstop frame, and described wheel comprises two wheel flutters and two tight pulleys, and two tight pulleys are controlled by braking mechanism respectively.
Useful technique effect of the present utility model is:
The utility model reasonable in design, the user can control locking and the release that the brake handgrip is realized wheel by hand, easy to operate.
The accompanying drawing explanation
The utility model is described in further detail below in conjunction with accompanying drawing and the specific embodiment:
Fig. 1 is backsight structural principle schematic diagram of the present utility model;
Fig. 2 is the lateral plan of Fig. 1, and the braking mechanism part mainly is shown, and in figure, wheel is release position;
Fig. 3 is the lateral plan of Fig. 1, and the braking mechanism part mainly is shown, and in figure, wheel is braking mode;
Fig. 4 is left TV structure principle schematic of the present utility model;
Fig. 5 is right TV structure principle schematic of the present utility model.
In figure: the left gear frame of 1-, the right gear frame of 2-, 3-backstop frame, 4-wheel flutter, 5-tight pulley, the 6-handgrip that brakes, 7-diameter variable cam, the 8-pipe link that brakes, the 9-attaching parts, 10-bearing, 11-axle, the 12-slide block, 13-clip, 14-hollow tubular, the 15-bar hole, 16-connection wire rod, 17-guide groove, 18-spring one, 19-spring two, 20-baffle plate.
The specific embodiment
By reference to the accompanying drawings, a kind of hand barrow with external Cam brake mechanism, comprise vehicle frame, wheel and braking mechanism.Described vehicle frame comprises left gear frame 1, right gear frame 2 and backstop frame 3, and described wheel comprises that two wheel flutters 4 and 5, two tight pulleys 5 of two tight pulleys are arranged on the two ends, below of backstop frame 3, and two tight pulleys 5 are all controlled by braking mechanism.Described braking mechanism comprises brake handgrip 6, diameter variable cam 7 and brake pipe link 8, brake handgrip 6 drives diameter variable cam 7 rotations by attaching parts 9, below diameter variable cam 7, be provided with bearing 10, diameter variable cam 7 contacts with bearing 10, jag and an end relative with jag at diameter variable cam 7 all offer limited impression, bearing 10 is set on axle 11, and axle 11 is fixedly connected with slide block 12.Brake pipe link 8 vertically arranges, and its top props up slide block 12, and bottom is provided with clip 13, is arranged with retracing spring on brake pipe link 8.Described vehicle frame is fixed with hollow tubular 14 in its backstop frame position, and hollow tubular 14 vertically is arranged on the top of tight pulley 5.Described slide block 12, brake pipe link 8 and retracing spring all are built in hollow tubular 14, at hollow tubular, vertically offer bar hole 15 towards a side of brake handgrip, the end of axle 11 and bearing 10 is from passing bar hole 15, described diameter variable cam 7 is arranged on the outside of hollow tubular, it is fixed on by connection wire rod 16 side that hollow tubular offers bar hole, and is positioned at the top of bar hole 15.One end of attaching parts 9 is fixedly connected with brake handgrip 6, and the other end is fixedly connected with connection wire rod 16.
Above-mentioned two tight pulleys are controlled by two braking mechanisms respectively, and two braking mechanisms share same brake handgrip 6, and brake handgrip 6 is arranged on middle part or the middle and upper part of vehicle frame, facilitate the user to grip and control with hand.
Below occupation mode of the present utility model is described:
In the time of need to making tight pulley 5 braking, with lifting on hand brake handgrip 6, the attaching parts 9 that brake handgrip 6 arranges by its two ends drives diameter variable cam 7 rotations, and diameter variable cam 7 will press down with the contacted bearing 10 in its underpart gradually in rotary course.Bearing 10 moves down by axle 11 band movable sliders 12, and slide block 12 promotes brake pipe link 8 downwards in folding process.After brake pipe link 8 moved down a segment distance, the clip 13 that is arranged on its lower end contacted with tight pulley 5, thereby made tight pulley 5 brakings.Meanwhile, in bearing 10 limited impression that embedding diameter variable cam 7 jags are offered just, make diameter variable cam 7 under the effect that is not subjected to additional steering effort, realize that self-locking fixes, after preventing that hand breaks away from brake handgrip 6, brake pipe link 8 and slide block 12 move and promote diameter variable cam 7 contrarotations under the effect of retracing spring, guarantee that braking state does not rebound.In the process that brake pipe link 8 moves down, the retracing spring be set on brake pipe link 8 gathers restoring force.When needs discharged tight pulley 5, with the subordinate brake handgrip 6 of pressing, brake handgrip 6 drove diameter variable cam 7 contrarotations by attaching parts 9, and the bearing 10 that now is positioned at diameter variable cam 7 belows no longer is subjected to the downforce of diameter variable cam 7.Under the effect of retracing spring restoring force, on brake pipe link 8, move and return back to original position, clip 13 breaks away from tight pulley 5, and tight pulley 5 discharges.Brake pipe link 8 simultaneously by side's disposed thereon slide block 12 jack-up upwards, and slide block 12 band moving axis 11 and bearing 10 return back to original position.Bearing 10 returns back in the limited impression that after original position, embedding diameter variable cam 7 other end relative with jag offered just.Operation, can realize braking and the release of tight pulley 5 so repeatedly.
As to further improvement of the utility model, in the bottom of slide block 12, offer guide groove 17, the top of brake pipe link 8 is inserted in guide groove 17.The setting of this guide groove 17 can prevent from braking pipe link 8 breaks away from slide block 15 dislocation.
Further, described retracing spring comprises spring 1 and spring 2 19.Spring 1 is arranged on the upper end of brake pipe link 8, and the upper end of spring 1 is connected with the top of brake pipe link 8, and lower end is connected with hollow tubular 14.Spring 2 19 is arranged on the lower end of brake pipe link 8, and the upper end of spring 2 19 is connected with brake pipe link 8, and lower end is against on the baffle plate 20 of hollow tubular below setting.Retracing spring arranges two, and lays respectively at the two ends up and down of brake pipe link, can gather enough restoring forces on the one hand, and the pipe link Quick-return that makes to brake is to original position, and the pipe link that can prevent from the other hand braking departs from vertical direction in the process of homing.
The relevant technologies content of not addressing in aforesaid way is taked or is used for reference prior art and can realize.
It should be noted that, under the instruction of this specification sheets, any equivalents that those skilled in the art have done, or obvious variant, all should be within protection domain of the present utility model.
Claims (4)
1. hand barrow with external Cam brake mechanism, comprise vehicle frame, wheel and braking mechanism, it is characterized in that: described braking mechanism comprises the brake handgrip, diameter variable cam and brake pipe link, the brake handgrip drives the diameter variable cam rotation by attaching parts, below diameter variable cam, be provided with bearing, diameter variable cam contacts with bearing, two ends at diameter variable cam offer limited impression, bearing carrier ring is located on axle, axle is fixedly connected with slide block, the brake pipe link vertically arranges, its top props up slide block, bottom is provided with clip, on the brake pipe link, be arranged with retracing spring, on described vehicle frame, be fixed with hollow tubular, hollow tubular vertically is arranged on the wheel top, described slide block, brake pipe link and retracing spring all are built in hollow tubular, a side at hollow tubular offers bar hole, the end of axle and bearing is from passing bar hole, described diameter variable cam is arranged on the outside of hollow tubular, and it is fixed on by connection wire rod the side that hollow tubular offers bar hole, and is positioned at the top of bar hole.
2. a kind of hand barrow with external Cam brake mechanism according to claim 1, it is characterized in that: the bottom at slide block offers guide groove, and the top of brake pipe link is inserted in guide groove.
3. a kind of hand barrow with external Cam brake mechanism according to claim 1 and 2, it is characterized in that: described retracing spring comprises spring one and spring two, spring one is arranged on the upper end of brake pipe link, the upper end of spring one is connected with the top of brake pipe link, the lower end of spring one is connected with hollow tubular, spring two is arranged on the lower end of brake pipe link, the upper end of spring two is connected with the brake pipe link, and the lower end of spring two is connected with hollow tubular or is against on the baffle plate of hollow tubular below setting.
4. a kind of hand barrow with external Cam brake mechanism according to claim 1, it is characterized in that: described vehicle frame comprises left gear frame, right gear frame and backstop frame, described wheel comprises two wheel flutters and two tight pulleys, and two tight pulleys are controlled by braking mechanism respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202832395U CN203306060U (en) | 2013-05-22 | 2013-05-22 | Trolley with external cam braking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202832395U CN203306060U (en) | 2013-05-22 | 2013-05-22 | Trolley with external cam braking mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203306060U true CN203306060U (en) | 2013-11-27 |
Family
ID=49612287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202832395U Expired - Fee Related CN203306060U (en) | 2013-05-22 | 2013-05-22 | Trolley with external cam braking mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203306060U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106358812A (en) * | 2016-11-04 | 2017-02-01 | 东莞辰达电器有限公司 | Mobile planting frame |
| CN106741106A (en) * | 2016-12-21 | 2017-05-31 | 苏州新区德力精密机械有限公司 | Universal wheel brake gear and the two-wheel synchronous brake system using the brake gear |
| PL126453U1 (en) * | 2017-06-28 | 2019-01-02 | Agata Bugalska | Folding carriage for carrying art portfolio cases |
-
2013
- 2013-05-22 CN CN2013202832395U patent/CN203306060U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106358812A (en) * | 2016-11-04 | 2017-02-01 | 东莞辰达电器有限公司 | Mobile planting frame |
| CN106741106A (en) * | 2016-12-21 | 2017-05-31 | 苏州新区德力精密机械有限公司 | Universal wheel brake gear and the two-wheel synchronous brake system using the brake gear |
| PL126453U1 (en) * | 2017-06-28 | 2019-01-02 | Agata Bugalska | Folding carriage for carrying art portfolio cases |
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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 |
Granted publication date: 20131127 Termination date: 20150522 |
|
| EXPY | Termination of patent right or utility model |