CN208631997U - A kind of brake-loosing mechanism of drum brake - Google Patents
A kind of brake-loosing mechanism of drum brake Download PDFInfo
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- CN208631997U CN208631997U CN201821251180.0U CN201821251180U CN208631997U CN 208631997 U CN208631997 U CN 208631997U CN 201821251180 U CN201821251180 U CN 201821251180U CN 208631997 U CN208631997 U CN 208631997U
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Abstract
A kind of brake-loosing mechanism of drum brake, belongs to brake technical field.Drum brake is symmetrically arranged on the two sides of traction machine body, it includes the brake arm for being installed on body two sides, pull rod, tripping spring, spring base, feature: the drum brake further includes the brake-loosing mechanism for having one for manual releasing brake, the brake-loosing mechanism includes pull parts and rotatable parts, hinged by hinge bar between the pull parts and the rotatable parts and can relatively rotate；When declutching, the one end for pulling on component is fixed on brake arm, and one end end of the pull rod far from body is fixed in one end of rotatable parts, by pulling rotatable parts, pull parts are driven by the rotation of rotatable parts, and then brake arm is pulled by pull parts, so that it is rotated around corresponding fixed pin and is realized and declutch.Avoid the generation of elevator safety accident；It is easy to operate；Structure is simple, at low cost, easy to maintain.
Description
Technical field
The utility model belongs to brake technical field, and in particular to a kind of brake-loosing mechanism of drum brake.
Background technique
Drum brake in prior art, for structure as disclosed in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, it mainly includes adjustment
Bolt 1, brake arm 3, pull rod 4, tripping spring 5, spring base 6, the second locking nut 7, brake(-holder) block 8, is consolidated first locking nut 2
Rationed marketing 9, electromagnet component 10 etc., the electromagnet component 10 include static iron core 11, dynamic iron core 12, coil block 13, tubular
Shell 14, spacer ring 15, brake-releasing gear 16, mandril 17 and body fixation member 18.Described 14 inner wall of barrel-type casing or so is equipped with
Two coil blocks 13 have a spacer ring 15 to separate between two coil blocks 13, are correspondingly provided with two inside two coil blocks 13
The two sides port of dynamic iron core 12, the barrel-type casing 14 is fastened with static iron core 11 by screw, is riveted on the top in dynamic iron core 12
Bar 17 extends to outside barrel-type casing 14 after passing through the through-hole among static iron core 11, and corresponds to the adjustment bolt 1.Described
Brake-releasing gear 16 includes declutch bar 161, circular shaft 162, and one end of the circular shaft 162 processes a hole, for being inserted into the bar 161 that declutches,
The other end of circular shaft 162 is processed as flat, and circular shaft 162 is processed as flat one end preset hole on the barrel-type casing 14
141 and spacer ring 15 on be inserted among two dynamic iron cores 12 after corresponding through-hole.
The brake arm 3 is by 9 hub setting of fixed pin on body；It is on brake arm 3 and right that the brake(-holder) block 8 is pasted onto
It should be in braked wheel；The pull rod 4 is connected in body fixation member 18 after passing through brake arm 3；5 sets of the tripping spring
It is located on pull rod 4, one end and the spring base 6 for being located at 4 end of pull rod are inconsistent, the other end is corresponding fixed on brake arm 3
Position slot is inconsistent, is screwed with the second locking nut 7 on the pull rod in 6 outside of spring base, is revolved by the precession of the second locking nut 7
Out, it can adjust the spring force of tripping spring 5, which pushes brake arm 3, the brake(-holder) block 8 on brake arm 3 is made firmly to be pressed in system
On driving wheel, for braked wheel described in stop；The adjustment bolt 1 is mounted on the upper end of brake arm 3, is screwed with thereon
One locking nut 2.
In the open state, coil is powered brake, is formed between static iron core 11, dynamic iron core 12 and barrel-type casing 14
There is electromagnetic circuit, generates electromagnetic force, so that static iron core 11 attracts dynamic iron core 12, dynamic iron core 12 is moved towards 11 direction of static iron core,
When adjustment bolt 1 is arrived on the top of mandril 17 in dynamic iron core 12, under the action of electromagnetic force, electromagnetic force overcomes the bullet of tripping spring 5
Spring force effect, so that the brake(-holder) block 8 on brake arm 3 leaves the surface of braked wheel, braked wheel is freely rotated.It is disconnected in elevator traction machine
When electric, electromagnetic attraction is lost between static iron core 11 and dynamic iron core 12, two adjustment bolts 1 are respectively in the pressure of a pair of of tripping spring 5
Dynamic iron core 12 is pushed into middle position under effect, two brake arms 3 are drawn close to braked wheel direction respectively and made by a pair on the inside of it
Braked wheel described in 8 obvolvent of movable plate, is able to rotate traction machine not.When rescuing or overhauling elevator, as long as pulling the bar 161 that declutches,
Circular shaft 162 rotates, and the end of flat one end of circular shaft 162 will open dynamic iron core 12, make dynamic iron core 12 to 11 side of static iron core
To movement, when adjustment bolt 1 is arrived on the top of mandril 17 in dynamic iron core 12, rotate brake arm 3 around corresponding fixed pin 9, brake arm 3
On brake(-holder) block 8 leave the surface of braked wheel, convenient for disk moves elevator traction machine main shaft and carriage is moved to required position.
The above-mentioned structure that the dynamic iron core 12 of two sides is unclamped simultaneously by the bar 161 that declutches, in actual use
Existing deficiency: it when brake-releasing gear 16 declutches, is ground between the end meeting and dynamic iron core 12 of flat one end of circular shaft 162
Damage, after long-time use, the end of the flat one end will wear very serious, and along with the effect of gravity, declutch bar
161 meeting run-off the straights, lead to the end also run-off the straight of flat one end of circular shaft 162, when brake needs to brake, due to
The inclination card resistance of flat shaft end and dynamic iron core 12 can not be passed to the middle part of barrel-type casing 14, such brake can not yet
Effective stop braked wheel, so as to cause the generation of elevator safety accident.
In view of above-mentioned prior art, it is necessary to reasonably be improved the brake-loosing mechanism of existing drum brake.For this purpose,
The applicant has made actively effectively to explore, and forms technical solution described below finally.
Summary of the invention
The task of the utility model is to provide for a kind of brake-loosing mechanism of drum brake, of simple structure and low cost,
Declutching, it is convenient laborsaving to operate, and the brake-releasing gear of brake in the prior art is avoided to lead to the hair of safety accident because card resistance occurs
It is raw, and then guarantee that braking system running is safe and reliable, extend the service life of electromagnet component, hoisting elevator is safeguarded convenient
Property.
What the task of the utility model was performed by, a kind of brake-loosing mechanism of drum brake, the drum-type system
Dynamic device is symmetrically arranged on the two sides of traction machine body comprising is installed on brake arm, pull rod, tripping spring, the bullet of body two sides
Spring abutment, through fixed pin hub setting on body, the pull rod is connected on body the brake arm after passing through brake arm,
The tripping spring is set on pull rod, the one end and spring base for being located at tie rod end is inconsistent, the other end and brake arm
It is inconsistent, locking member is provided on the pull rod on the outside of spring base, it is characterised in that: the drum brake further includes having one
For the brake-loosing mechanism of manual releasing brake, which includes pull parts and rotatable parts, the pull parts
It is hinged and can relatively rotate by hinge bar between the rotatable parts；When declutching, the one of component is pulled on
End is fixed on brake arm, and one end end of the pull rod far from body is fixed in one end of rotatable parts, by pulling rotation section
Part drives pull parts by the rotation of rotatable parts, and then pulls brake arm by pull parts, turns it around corresponding fixed pin
It moves and realizes and declutch.
In a specific embodiment of the utility model, the pull rod is machined in one end end far from body
Hole.
In another specific embodiment of the utility model, the hole is the slot that circular hole is either open outwardly
Hole.
In another specific embodiment of the utility model, the pull parts include the first pull lever, second
Pull lever, first connecting rod, first pull lever and the second pull lever parallel opposed are pulled in the first pull lever and second
The both ends in pole length direction offer the corresponding connecting hole in position and hinge hole；The hinge bar passes through on rotatable parts
It is locked after hinge hole in hinge hole, the first pull lever and the second pull lever with fastener；The both ends of the first connecting rod
It is locked respectively with fastener after the connecting hole of the connecting hole and the second pull lever that pass through the first pull lever.
In another specific embodiment of the utility model, the pull parts are in U-shape structure, including as U
First bottom bar on shape bottom edge, the first pull lever and the second pull lever parallel to each other opposed and that connect the first bottom bar both ends.
In the utility model there are one in specific embodiment, the U-shaped structure of the pull parts is by first
Pull lever and the second pull lever are respectively welded being formed in the first bottom bar both ends or are directly shape by root long bar bending
At.
The utility model so that in a specific embodiment, the rotatable parts include the first rotating bar, the
Two rotating bars, the second connecting rod, first rotating bar and the second rotating bar parallel opposed, in the first rotating bar and second turn
The corresponding connecting hole in position and hinge hole are offered on the length direction of lever；One end of the hinge bar passes through first
It is locked after the hinge hole of rotating bar and the hinge hole of the first pull lever with fastener, the other end of the hinge bar passes through second
It is locked after the hinge hole of rotating bar and the hinge hole of the second pull lever with fastener；The both ends of second connecting rod are passing through
It is locked respectively with fastener after the connecting hole of first rotating bar and the connecting hole of the second rotating bar, when declutching, described second connects
Extension bar is arranged in hole, realizes the connection with pull rod.
In the utility model more and in a specific embodiment, it is used to connect for second in first rotating bar
The connecting hole that extension bar passes through is processed into the first open slot of side tool gap；It is used to connect for second in second rotating bar
The connecting hole that extension bar passes through is processed into the second open slot of side tool gap, and when declutching, second connecting rod is connected to the
On one open slot, the second open slot.
In the utility model again and then in a specific embodiment, in first rotating bar and the second rotating bar
Hinge hole be provided with close at the position of pull rod respectively；Meanwhile it is easy to operate in order to declutch, by described first turn
The extended length of lever and the second rotating bar, and one end end of the separate pull rod of the first rotating bar and the second rotating bar it
Between be connected with third connecting rod, as long as holding the third connecting rod when declutching, so that it may conveniently pull rotatable parts.
In the utility model again more and in a specific embodiment, the rotatable parts are in U-shape structure, including make
The second bottom bar, the first rotating bar and the second rotating bar parallel to each other opposed and that connect the second bottom bar both ends for U-shaped bottom edge,
A lengthening handle is connected and installed on the bottom bar.
In the utility model more and then in a specific embodiment, the U-shaped structure of the rotatable parts is by the
One rotating bar and the second rotating bar be respectively welded it is being formed in the second bottom bar both ends or be directly by a root long bar bending and
It is formed.
The utility model is due to after adopting the above structure, having the advantages that firstly, brake has cast out original electromagnetism
Brake-releasing gear in iron component is only just used when declutching, when not declutching using brake-loosing mechanism provided by the utility model
It is placed in beside traction machine convenient for the position picked and placed, solves the circular shaft of brake-releasing gear in prior art due to the abrasion of flat end
The dynamic iron core that card resistance residence is stated in brake, the problem of causing dynamic iron core that can not be pushed to the middle part of barrel-type casing, from
And avoid the generation of elevator safety accident；Secondly, brake-loosing mechanism is installed on traction machine when declutching, with the second connecting rod
For fixed point, rotating bar is pulled, pull parts pull brake arm to make it around corresponding fixed pin with the rotation of rotatable parts
It rotates, the friction plate on brake arm leaves the surface of braked wheel, and realization is declutched, easy to operate；Third is ensuring braking system fortune
While making safe and reliable, the simple brake-loosing mechanism of structure is provided, it is at low cost, improve the convenience of elevator maintenance.
Detailed description of the invention
Fig. 1 is in structural schematic diagram when release conditions for drum brake in prior art.
Fig. 2 is the partial sectional view of electromagnet component described in prior art.
Fig. 3 is that brake is in cross-sectional view when release conditions at A-A shown in Fig. 2 in prior art.
Fig. 4 is that brake is in on-position and at when brake-releasing gear to be ready declutching A-A shown in Fig. 2 in prior art
Cross-sectional view.
Fig. 5 is structural schematic diagram of the utility model without the drum brake of brake-loosing mechanism.
Fig. 6 is the structural schematic diagram of one embodiment of brake-loosing mechanism described in the utility model.
Fig. 7 is a kind of mounting means structural schematic diagram of one embodiment of brake-loosing mechanism shown in Fig. 6.
Fig. 8 is another mounting means structural schematic diagram of one embodiment of brake-loosing mechanism shown in Fig. 6.
Fig. 9 is the structural schematic diagram of another embodiment of brake-loosing mechanism described in the utility model.
Figure 10 is a kind of mounting means structural schematic diagram of another embodiment of brake-loosing mechanism shown in Fig. 9.
Figure 11 is another mounting means structural schematic diagram of another embodiment of brake-loosing mechanism shown in Fig. 9.
Figure 12 is the structural schematic diagram of the another embodiment of brake-loosing mechanism described in the utility model.
Figure 13 is a kind of mounting means structural schematic diagram of the another embodiment of brake-loosing mechanism shown in Figure 12.
Figure 14 is another mounting means structural schematic diagram of the another embodiment of brake-loosing mechanism shown in Figure 12.
Figure 15 is the structural schematic diagram of brake-loosing mechanism described in the utility model and then an embodiment.
Figure 16 is the explosive view of brake-loosing mechanism described in the utility model and then an embodiment.
Figure 17 is the mounting means structural schematic diagram of brake-loosing mechanism shown in Figure 15 and then an embodiment.
In figure: 1. adjustment bolts；2. the first locking nut；3. brake arm, 31. slots；4. pull rod, 41. holes；5. braking
Spring；6. spring base；7. the second locking nut；8. brake(-holder) block；9. fixed pin；10. electromagnet component, 11. static iron cores, 12. are moved
Iron core, 13. coil blocks, 14. barrel-type casings, 141. holes, 15. spacer rings, 16. brake-releasing gears, 161. declutch bar, 162. circular shafts,
17. mandril, 18. body fixation members, 19. little springs；20. brake-loosing mechanism, 21. pull parts, 211. first pull lever, 212.
Second pull lever, 213. first connecting rods, 214. first bottom bars, 22. rotatable parts, 221. first rotating bars, 222. second turns
Lever, 223. second connecting rods, 224. third connecting rods, 225. first open slots, 226. second open slots, 227. second bottoms
Bar, 23. hinge bars, 24. lengthen handle.
Specific embodiment
Applicant will elaborate in conjunction with attached drawing by way of examples below, but not to the description of embodiment
It is the limitation to the utility model, it is any according to only formal and insubstantial made by the utility model design
The equivalent transformation of property is regarded as category of the technical solutions of the present invention.
Fig. 5, Fig. 6 are please referred to, the utility model relates to a kind of brake-loosing mechanism of drum brake, the drum brake
The two sides of traction machine body are symmetrically arranged on, mainly include adjustment bolt 1, the first locking nut 2, brake arm 3, pull rod 4, system
It moves spring 5, spring base 6, the second locking nut 7, brake(-holder) block 8, fixed pin 9, electromagnet component 10 etc., the electromagnet component
10 include static iron core 11, dynamic iron core 12, coil block 13, barrel-type casing 14, spacer ring 15, mandril 17 and body fixation member 18.
Through 9 hub setting of fixed pin on body, the pull rod 4 is connected on body the brake arm 3 after passing through brake arm 3,
The tripping spring 5 is set on pull rod 4, the one end and spring base 6 for being located at 4 end of pull rod is inconsistent, the other end and system
Swing arm 3 is inconsistent, is provided with locking member on the pull rod 4 in 6 outside of spring base, above structure belongs to well known prior art, no
It is described in detail again.Herein it should be understood that the utility model has cast out the brake-releasing gear 16 in prior art, and described
Two dynamic iron cores 12 face each other setting face on be machined with corresponding counterbore, little spring is installed in the counterbore
19.Meanwhile the pull rod 4 is machined with hole 41 in one end end far from body, the hole 41 is that circular hole is either open
Slot outwardly.
As shown in Fig. 6 to Figure 13, the drum brake further includes the machine that declutches for having one for manual releasing brake
Structure 20, the brake-loosing mechanism 20 include pull parts 21 and rotatable parts 22, the pull parts 21 and the rotatable parts
It is hinged and can relatively rotate by hinge bar 23 between 22.When declutching, system is fixed in the one end for pulling on component 21
On swing arm 3, and one end end of the pull rod 4 far from body is fixed in one end of rotatable parts 22, by pulling rotatable parts 22, by
The rotation of rotatable parts 22 drives pull parts 21, and then pulls brake arm 3 by pull parts 21, makes it around corresponding fixed pin
9 rotate, and the brake(-holder) block 8 on brake arm 3 leaves the surface of braked wheel and declutches.
The specific structure of the brake-loosing mechanism 20 is as disclosed in following embodiment.
Embodiment 1:
Fig. 5, Fig. 6, Fig. 7, Fig. 8 are please referred to, the pull parts 21 include the first pull lever 211, the second pull lever
212, first connecting rod 213, the first pull lever 211,212 parallel opposed of the second pull lever are drawn in the first pull lever 211 and second
The both ends of 212 length direction of lever offer the corresponding connecting hole in position and hinge hole.
The rotatable parts 22 include the first rotating bar 221, the second rotating bar 222, the second connecting rod 223, described
222 parallel opposed of first rotating bar 221 and the second rotating bar, in the length direction of the first rotating bar 221 and the second rotating bar 222
On offer the corresponding connecting hole in position and hinge hole.
One end of the hinge bar 23 passes through the hinge hole of the first rotating bar 221 and the hinge hole of the first pull lever 211
Use nut check afterwards, the other end of the hinge bar 23 passes through the hinge hole and the second pull lever 212 of the second rotating bar 222
Nut check is used after hinge hole；
The both ends of the first connecting rod 213 are in the connecting hole and the second pull lever 212 for passing through the first pull lever 211
Nut check is used after connecting hole respectively；
The both ends of second connecting rod 223 are in the connecting hole and the second rotating bar 222 for passing through the first rotating bar 221
Nut check is used after connecting hole respectively；
First pull lever 211 and the first rotating bar 221 setting inside or outside, it is unrestricted.Together
Sample, second pull lever 212 and the setting of the second rotating bar 222 are also unrestricted in inside or outside.
When declutching, staff need to unload the first connecting rod 213 of pull parts 21, first connecting rod 213 is placed in quiet
In gap between iron core 11 and brake arm 3, the first pull lever 211 and the second pull lever 212 are then fixed tightly in the first connection
The both ends of bar 213.If first connecting rod 213 is located at 3 top of brake arm, groove 31 need to be opened up on brake arm 3, makes the first company
Extension bar 213 is located in groove 31, if first connecting rod 213 is located at the lower section of brake arm 3, without processing groove 31.Likewise,
Second connecting rod 223 is passed through the hole 41 of 4 end of pull rod, then by first turn by the second connecting rod 223 for unloading rotatable parts 22
Lever 221 and the second rotating bar 222 are fixed tightly in the both ends of the second connecting rod 223.When declutching with the second connecting rod 223 be fix
Point pulls rotatable parts 22 outward, and pull parts 21 pull brake arm 3 with the rotation of rotatable parts 22, makes it around corresponding
Fixed pin 9 rotate, the brake(-holder) block 8 on brake arm 3 leaves the surface of braked wheel, and realization is declutched.
In order to enable reasonable stress, pulls 22 convenience of the second rotatable parts, by the first rotating bar 221 and the second rotating bar
222 hinge hole is provided with the position close to the hole 41 of pull rod 4 as far as possible.In the present embodiment, the second connecting rod 223 cooperates with hole 41
So that rotatable parts 22 is installed on pull rod 4, so the hinge hole of the first rotating bar 221 and the second rotating bar 222 is close to the
Two connecting rods 223 open up, while easy to operate in order to declutch, need to be by first rotating bar 221 and the second rotating bar
222 extended length, and connected between one end end of the separate pull rod 4 in the first rotating bar 221 and the second rotating bar 222
There is third connecting rod 224, as long as rotatable parts 22 can conveniently be pulled by holding third connecting rod 224 when declutching.In the present embodiment,
The hole 41 of 4 end of pull rod, which can open up, can also open up into the slot of opening outwardly for circular hole, and brake-loosing mechanism 20 is installed
When, connecting rod is connected in slot.
Embodiment 2:
Fig. 9, Figure 10, Figure 11 are please referred to, in order to simplify the operational sequence that brake-loosing mechanism 20 is installed on traction machine, to rotation
The end of component 22 makes improvements, and thes improvement is that: being used to wear for the second connecting rod 223 in first rotating bar 221
The connecting hole crossed is processed into the first open slot 225 of side tool gap；It is used to connect for second in second rotating bar 222
The connecting hole that extension bar 223 passes through is processed into the second open slot 226 of side tool gap.
When declutching, staff need to unload the first connecting rod 213 of pull parts 21, first connecting rod 213 is placed in quiet
In gap between iron core 11 and brake arm 3, the first pull lever 211 and the second pull lever 212 are then fixed tightly in the first connection
The both ends of bar 213.Second connecting rod 223 is passed through to the hole 41 of 4 end of pull rod, then by the first rotating bar 221 and the second rotation
First, second open slot 225,226 of bar 222 is connected to the both ends of the second connecting rod 223, and then force pulls rotatable parts
22, with the second connecting rod 223 it is fixed point when declutching, rotatable parts 22 is pulled outward, pull parts 21 are with rotatable parts 22
Rotation and pull brake arm 3 to rotate it around corresponding fixed pin 9, the brake(-holder) block 8 on brake arm 3 leaves the table of braked wheel
Face, realization are declutched.In such a way that open slot blocks the second connecting rod 223, the step of saving nutting, so that installation is simpler
Just.
Embodiment 3:
Figure 12, Figure 13, Figure 14 are please referred to, in order to reduce the volume of brake-loosing mechanism 20, rotatable parts 22 is improved, are changed
It is into place: rotatable parts 22 is fabricated to U-shaped structure by way of bending or welding, including as U-shaped bottom edge
Two bottom bars 227, the first rotating bar 221 and the second rotating bar 222 parallel to each other opposed and that connect 227 both ends of the second bottom bar.U-shaped
The rotatable parts 22 of structure be respectively welded by the first rotating bar 221 and the second rotating bar 222 in 227 both ends of the second bottom bar and shape
At or directly be by a root long bar bend and formed.The brake-loosing mechanism 20 further includes a lengthening handle 24, institute
Threaded hole is offered on the bottom bar 227 stated, the lengthening handle 24 is bolted in the threaded hole of bottom bar 227.
When declutching, staff need to unload the first connecting rod 213 of pull parts 21, first connecting rod 213 is placed in quiet
In gap between iron core 11 and brake arm 3, the first pull lever 211 and the second pull lever 212 are then fixed tightly in the first connection
The both ends of bar 213.Handle 24 will be lengthened to be screwed on the second bottom bar 227, then the second connecting rod 223 is passed through into 4 end of pull rod
Then first, second notch 225,226 of the first rotating bar 221 and the second rotating bar 222 is buckled in the second connecting rod by hole 41
223 both ends, then force pulls rotatable parts 22, and pull parts 21 pull brake arm 3 with the rotation of rotatable parts 22
Rotate it around corresponding fixed pin 9, the brake(-holder) block 8 on brake arm 3 leaves the surface of braked wheel, and realization is declutched.The present embodiment
The brake-loosing mechanism structure is simple, compact, places and does not take up space, is at low cost.
Embodiment 4:
Figure 15, Figure 16, Figure 17 are please referred to, in order to be further simplified the operative employee that brake-loosing mechanism 20 is installed on traction machine
Sequence is improved pull parts 21, is theed improvement is that: pulling on component 21 by way of bending or welding and is fabricated to U
Shape structure, including the first bottom bar 214 as U-shaped bottom edge, the first drawing that is parallel to each other opposed and connecting 214 both ends of the first bottom bar
Lever 211 and the second pull lever 212.The pull parts 21 of U-shaped structure are divided by the first pull lever 211 and the second pull lever 212
Be not welded in 214 both ends of the first bottom bar and formed or be directly by a root long bar bend and formed.Described first is drawn
The hinge hole being connected in lever 211 and the second pull lever 212 with hinge bar 23 is open slot, can be connected on hinge bar 23.
When declutching, the pull parts 21 of U-shaped structure are bypassed brake arm 3 by staff, and the first bottom bar 214 is made to be placed in quiet iron
In gap between core 11 and brake arm 3, and the open slot in the first pull lever 211 and the second pull lever 212 is buckled in hinge
On extension bar 23.Handle 24 will be lengthened to be screwed on the second bottom bar 227, then the second connecting rod 223 is passed through to the hole of 4 end of pull rod
41, the first, second notch 225,226 of the first rotating bar 221 and the second rotating bar 222 is then buckled in the second connecting rod
223 both ends, then force pulls rotatable parts 22, and pull parts 21 pull brake arm 3 with the rotation of rotatable parts 22
Rotate it around corresponding fixed pin 9, the brake(-holder) block 8 on brake arm 3 leaves the surface of braked wheel, and realization is declutched.The present embodiment
The brake-loosing mechanism structure is simple, compact, install convenient, places and does not take up space, is at low cost.
Claims (10)
1. a kind of brake-loosing mechanism of drum brake, the drum brake are symmetrically arranged on the two sides of traction machine body,
Brake arm (3), pull rod (4), tripping spring (5), spring base (6) including being installed on body two sides, the brake arm (3) are logical
Fixed pin (9) hub setting is crossed on body, the pull rod (4) is connected on body after passing through brake arm (3), the braking
Spring (5) is set on pull rod (4), the one end and spring base (6) for being located at pull rod (4) end is inconsistent, the other end and braking
Arm (3) is inconsistent, is provided with locking member on the pull rod (4) on the outside of spring base (6), it is characterised in that: the drum brake
Device further include have one for manual releasing brake brake-loosing mechanism (20), the brake-loosing mechanism (20) include pull parts (21) and
Rotatable parts (22) are hinged on one by hinge bar (23) between the pull parts (21) and the rotatable parts (22)
It rises and can relatively rotate；When declutching, the one end for pulling on component (21) is fixed on brake arm (3), and rotatable parts (22)
One end be fixed on pull rod (4) far from body one end end, by pulling rotatable parts (22), by rotatable parts (22) turn
It is dynamic to drive pull parts (21), and then brake arm (3) are pulled by pull parts (21), rotate it around corresponding fixed pin (9)
And it realizes and declutches.
2. a kind of brake-loosing mechanism of drum brake according to claim 1, it is characterised in that the pull rod (4) is remote
Disembark one end end of body is machined with hole (41)；The hole (41) is the slot that circular hole is either open outwardly.
3. a kind of brake-loosing mechanism of drum brake according to claim 1, it is characterised in that the pull parts
It (21) include the first pull lever (211), the second pull lever (212), first connecting rod (213), first pull lever (211)
With the second pull lever (212) parallel opposed, opened at the both ends of the first pull lever (211) and the second pull lever (212) length direction
Equipped with the corresponding connecting hole in position and hinge hole；The hinge bar (23) passes through hinge hole on rotatable parts (22), the
It is locked after hinge hole in one pull lever (211) and the second pull lever (212) with fastener；The first connecting rod (213)
Both ends pass through the first pull lever (211) connecting hole and the second pull lever (212) connecting hole after locked respectively with fastener
Tightly.
4. a kind of brake-loosing mechanism of drum brake according to claim 1, it is characterised in that the pull parts
(21) be in U-shape structure, including the first bottom bar (214) as U-shaped bottom edge, parallel to each other opposed and connection the first bottom bar (214)
First pull lever (211) and the second pull lever (212) at both ends.
5. a kind of brake-loosing mechanism of drum brake according to claim 4, it is characterised in that the pull parts
(21) U-shaped structure is to be respectively welded by the first pull lever (211) and the second pull lever (212) in the first bottom bar (214) both ends
And formed or be directly by a root long bar bend and formed.
6. a kind of brake-loosing mechanism of drum brake according to claim 3 or 4, it is characterised in that the rotatable parts
It (22) include the first rotating bar (221), the second rotating bar (222), the second connecting rod (223), first rotating bar (221)
With the second rotating bar (222) parallel opposed, opened on the length direction of the first rotating bar (221) and the second rotating bar (222)
Equipped with the corresponding connecting hole in position and hinge hole；One end of the hinge bar (23) passes through the hinge of the first rotating bar (221)
It is locked after connecing the hinge hole of hole and the first pull lever (211) with fastener, the other end of the hinge bar (23) passes through second
It is locked after the hinge hole of rotating bar (222) and the hinge hole of the second pull lever (212) with fastener；Second connecting rod
(223) both ends are after the connecting hole of the connecting hole and the second rotating bar (222) that pass through the first rotating bar (221) respectively with fastening
Part locking, when declutching, second connecting rod (223) is arranged in hole (41), realizes the connection with pull rod (4).
7. a kind of brake-loosing mechanism of drum brake according to claim 6, it is characterised in that first rotating bar
(221) connecting hole for supplying the second connecting rod (223) to pass through on is processed into the first open slot (225) of side tool gap；
Has gap for being processed into side for the connecting hole that the second connecting rod (223) pass through in second rotating bar (222)
Second open slot (226), when declutching, second connecting rod (223) is connected to the first open slot (225), the second open slot
(226) on.
8. a kind of brake-loosing mechanism of drum brake according to claim 6, it is characterised in that first rotating bar
(221) it is provided with close at the position of pull rod (4) respectively with the hinge hole in the second rotating bar (222)；Meanwhile in order to declutch
It is easy to operate, by the extended length of first rotating bar (221) and the second rotating bar (222), and at first turn
Third connecting rod (224) are connected between one end end of the separate pull rod (4) of lever (221) and the second rotating bar (222),
As long as holding the third connecting rod (224) when declutching, so that it may conveniently pull rotatable parts (22).
9. a kind of brake-loosing mechanism of drum brake according to claim 6, it is characterised in that the rotatable parts
(22) be in U-shape structure, including the second bottom bar (227) as U-shaped bottom edge, parallel to each other opposed and connection the second bottom bar (227)
First rotating bar (221) and the second rotating bar (222) at both ends, are connected and installed with a lengthening hand on the bottom bar (227)
Handle (24).
10. a kind of brake-loosing mechanism of drum brake according to claim 9, it is characterised in that the rotatable parts
(22) U-shaped structure is to be respectively welded by the first rotating bar (221) and the second rotating bar (222) in the second bottom bar (227) both ends
And formed or be directly by a root long bar bend and formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821251180.0U CN208631997U (en) | 2018-08-03 | 2018-08-03 | A kind of brake-loosing mechanism of drum brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821251180.0U CN208631997U (en) | 2018-08-03 | 2018-08-03 | A kind of brake-loosing mechanism of drum brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208631997U true CN208631997U (en) | 2019-03-22 |
Family
ID=65739689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821251180.0U Active CN208631997U (en) | 2018-08-03 | 2018-08-03 | A kind of brake-loosing mechanism of drum brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208631997U (en) |
-
2018
- 2018-08-03 CN CN201821251180.0U patent/CN208631997U/en active Active
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