CN202640228U - Adjustable spanner - Google Patents
Adjustable spanner Download PDFInfo
- Publication number
- CN202640228U CN202640228U CN 201220021228 CN201220021228U CN202640228U CN 202640228 U CN202640228 U CN 202640228U CN 201220021228 CN201220021228 CN 201220021228 CN 201220021228 U CN201220021228 U CN 201220021228U CN 202640228 U CN202640228 U CN 202640228U
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- CN
- China
- Prior art keywords
- worm gear
- hole
- movable part
- wrench
- monkey wrench
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The utility model discloses an adjustable spanner, comprising a spanner body and a worm gear. The spanner body comprises a handle and a work portion, and the work portion comprises a fixed part, a movable part and a chute. The lower end of the movable part is disposed in the chute, and the bottom edge of the lower end of the movable part is provided with a tooth part. The work portion also comprises a through hole, and the worm gear is disposed in the through hole and is engaged with the tooth part. When the worm gear is rotated, the worm gear and the tooth part work, driving the movable part to move towards or away from the fixed part. The thread form of the worm gear is arc-shaped, and the top of the worm gear is provided with a bevel angle. The adjustable spanner can increase the torque that the worm gear can bear, and can improve the self-locking reliability of the worm gear.
Description
Technical field
The utility model relates to a kind of spanner, relates in particular to a kind of monkey wrench.
Background technology
Monkey wrench (adjustable wrench) generally is made of wrench body, worm gear, bearing pin, spring etc., is a kind ofly to screw or unscrew the instrument that angle screw or nut are arranged.
Wrench body comprises one handle and an operate portions.Operate portions comprises a fixed part, a movable part and a chute.The lower end of movable part is located in the chute, with towards or move away from the direction of fixed part.The root edge of the lower end of movable part is provided with tooth section.Threaded engagement on tooth section and the worm gear.Because the screw thread on the worm gear is meshed with the tooth section of the root edge of movable part lower end, the rotation worm gear, can drive movable part along chute with towards or move away from the direction of fixed part.
In the prior art, the tooth form of the screw thread on the worm gear is acme thread, and the reliability of self-locking is lower.
The utility model content
Because the defects of prior art, technical problem to be solved in the utility model provides a kind of monkey wrench, but the spacing of quick adjustment movable part and fixed part, and increase the moment of torsion that worm gear can bear.
For achieving the above object, the utility model provides a kind of monkey wrench, comprises a wrench body and a worm gear; Described wrench body comprises one handle and an operate portions; Described operate portions comprises a fixed part, a movable part and a chute; The lower end of described movable part is located in the chute, and the root edge of the lower end of described movable part is provided with tooth section; Described operate portions also comprises a through hole, and described worm gear is located in the described through hole, and with the engagement of described tooth section, when rotating described worm gear, described worm gear acts on described tooth section, so drive described movable part towards or move away from described fixed part; Wherein, the form of thread of described worm gear is circular arc, and the top is provided with the oblique angle.Further, scabble at the top of the described tooth section of the root edge of the lower end of described movable part.
Preferably, in the described monkey wrench, the number of leads of described worm gear is at least 2.Further, the number of leads of described worm gear is 2.
Preferably, described monkey wrench also comprises a bearing pin and a pin-and-hole, and described pin-and-hole is positioned on the described wrench body, and described bearing pin passes described pin-and-hole, axially is arranged in the described worm gear, and described worm gear can rotate around described bearing pin.Further, an end of described bearing pin is concordant with the exit portion of described pin-and-hole.
In a preferred embodiments, described monkey wrench also comprises a spring, and described spring is between described worm gear and described wrench body, and described bearing pin axially is arranged in the described spring.
Preferably, the cross section of described through hole is roughly rectangle.
Further, in another preferred embodiments, the both sides of described through hole have respectively a T-slot, and the axial both ends of the surface of described worm gear have respectively a boss, and in the time of in described worm gear is installed in described through hole, described boss cooperates with described T-slot.
Preferably, described tooth section is roughly semicircle, triangle or trapezoidal.
The tooth form of monkey wrench double thread of the present utility model is adjusted, the acme thread of original routine is changed into the surface of circular arc, and the top design bevel of screw thread interfered avoiding, simultaneously with in the spanner movable part with worm screw that worm gear contacts on tooth top section scabble, so that worm gear is drawn close to worm screw, bonded area between worm gear and the worm screw is strengthened, with the transmission of enhancing torque of wrenches, and the reliability of raising worm-gear self-locking.Monkey wrench of the present utility model has solved that people thirst for solving always but the technical barrier of failing all the time to succeed.
Secondly, the screw thread of worm gear of the present utility model has at least two helixes, but the spacing of quick adjustment movable part and fixed part, and increase the moment of torsion that worm gear can bear.
Again, the spring of monkey wrench of the present utility model is between worm gear and wrench body, and both ends of the spring abuts against respectively worm gear and wrench body, and the direction of the pressure of generation is that movable part is away from the direction of fixed part.By the pressure of this spring, when the operator does not rotate worm gear, can avoid the random rotation of worm gear self, thereby guarantee when clamping work pieces, movable part and worm gear can be reliably stressed.
In addition, the utility model increases by two T-slots on the through hole both sides of wrench body, and the both ends of the surface at worm gear increase by two boss simultaneously, strengthen the torsion that worm gear bears by the cooperation of this boss and T-slot.Because the existence of each parts gap of spanner, when spanner is stressed, have certain component and pass to worm gear, this component can be larger than the single thread of routine when adopting two screw thread, make the stressed further increasing of tooth section, the design of this structure, can improve the component that worm gear bears on the one hand, reduce simultaneously the requirement to quality of fit between other parts of spanner.
Be described further below with reference to the technique effect of accompanying drawing to design of the present utility model, concrete structure and generation, to understand fully the purpose of this utility model, feature and effect.
Description of drawings
Fig. 1 is the fixed part of the utility model the first embodiment and the front view that movable part is fitted;
Fig. 2 is that the A-A of Fig. 1 is to cutaway view;
Fig. 3 is the top view of Fig. 1;
Fig. 4 be the fixed part of the utility model the first embodiment and movable part from front view;
Fig. 5 is that the A-A of Fig. 4 is to cutaway view;
Fig. 6 is the worm gear form of thread schematic diagram of the utility model the second embodiment;
Fig. 7 is the front view of the slide block of the utility model the second embodiment;
Fig. 8 is the top view of slide block shown in Figure 7;
Fig. 9 is the structural representation of the wrench body of the utility model the 3rd embodiment;
Figure 10 is the structural representation with the boss worm gear of the utility model the 3rd embodiment.
The specific embodiment
As shown in Figure 1, the monkey wrench of the first embodiment of the present utility model comprises a wrench body and worm gear 24, and wrench body comprises one handle 1 and an operate portions 2.Operate portions comprises a fixed part 22, a movable part 21 and a chute 20.Fixed part 22 is positioned at the upper end of wrench body and is positioned at the sidepiece of wrench body.One end of chute 20 close fixed parts 22, and laterally extending, the two ends of chute 20 are opening-like, and the part of the upper end of chute 20 is also opening-like.
The lower end of movable part 21 is located in the chute 20, with towards or move away from the direction of fixed part 22.The lower end of movable part 21 comprises neck 27 and slide block 28, and slide block 28 is positioned at the bottom of neck 27, and is roughly cylindrical.Neck 27 and slide block 28 are located in the chute 20.At the root edge of slide block 28, be provided with the roughly tooth section 23 of semicircular in shape of cross section, be meshed with screw thread 26 on the worm gear 24.In fact, tooth section 23 has consisted of worm screw, and the meshing relation that itself and worm gear are 24 consists of worm couple.
In other embodiment of the present utility model, slide block 28 can roughly be cuboid.Certainly, the shape of slide block 28 is not limited to cylindrical or cuboid, and its shape only need guarantee slide block 28 mobile getting final product smoothly in chute 20.
In other embodiment of the present utility model, the cross sectional shape of tooth section 23 can be triangle, the arbitrary shape such as trapezoidal, only needs to guarantee that tooth section 23 and screw thread 26 engagements on the worm gear 24 get final product.
Also be provided with a through hole 29 below chute 20, the upper end of through hole 29 is communicated with chute 20, and the cross section of through hole 29 is roughly rectangular.Worm gear 24 is located in the through hole 29, and the screw thread 26 on the worm gear 24 has two helixes, and with tooth section 23 engagements of the root edge of slide block 28.Because the screw thread 26 of worm gear 24 is meshed with the tooth section 23 of slide block 28 root edges, when operator's thumb wheel worm gear 24, namely can drive movable part 21 with towards or move away from the direction of fixed part 22, thereby according to workpiece (for example, nut) size, the spacing of adjustment movable part 21 and fixed part 22.
In other embodiment of the present utility model, the cross sectional shape of through hole 29 can be for trapezoidal, and circle etc. only need to guarantee that worm gear 24 is contained in wherein, and the screw thread 26 of worm gear 24 is meshed with the tooth section 23 of slide block 28 root edges.
The monkey wrench of the first embodiment of the present utility model also comprises a bearing pin 25 and a pin-and-hole 30.Pin-and-hole 30 is positioned on the wrench body, and the shaft core position of pin-and-hole 30 is concordant with the shaft core position of worm gear 24.Bearing pin 25 passes pin-and-hole 30, axially is arranged in the worm gear 24.Worm gear 24 can rotate around bearing pin 25.One end of bearing pin 25 and the exit portion of pin-and-hole 30 or fully concordant.
The monkey wrench of the first embodiment of the present utility model also comprises a spring 31, between worm gear 24 and wrench body.One end of spring 31 abuts against worm gear 24, and the other end of spring 31 abuts against wrench body.Bearing pin 25 also axially is arranged in the spring 31.When operator's thumb wheel worm gear 24, the direction of the pressure that spring 31 produces is that movable part 21 is away from the direction of fixed part 22.By the pressure of spring 31, when operator's thumb does not rotate worm gear 24, can avoid the random rotation of worm gear 24 self, thereby guarantee that when clamping work pieces movable part 21 and worm gear 24 can be reliably stressed.
The screw-down torque that the screw thread 26 of worm gear 24 produces is directly proportional with the lead angle of the screw thread 26 of worm gear 24, and lead angle is directly proportional with the helix number.In the first embodiment, the helix number of worm gear 24 is 2.
In the first embodiment, two screw threads are on the basis of single thread, strengthen the pitch of individual pen screw thread by strengthening lead angle, but owing to strengthened lead angle, if directly simply change single thread into double thread with conventional method, can cause the reliability of self-locking between screw thread 26 and the tooth section 23 to reduce, when suddenly firmly or in the situation of exerting oneself continuously, screw thread can turn round and retreat the inefficacy that causes spanner, even can make spanner skid off the injury that causes personnel from nut.
Based on this, in the second embodiment of the present utility model, on the basis of two screw threads of the first embodiment, the tooth form of screw thread 26 is adjusted, the acme thread of original routine is changed into the surface 261 of circular arc, the mutual interference that may produce owing to the variation of profile of tooth in rotary course and between the tooth section 23 of slide block 28 root edges simultaneously, the top design bevel 262 of screw thread 26 is interfered avoiding, as shown in Figure 6.But because the existence at this oblique angle 262 can cause the minimizing of profile of tooth contact area between worm gear 24 and the tooth section 23, cause the reduction of torque of wrenches, in order to overcome this problem, the utility model with in the spanner movable part with worm screw that worm gear contacts on the top of tooth section 23 scabble, become surface 231, so that worm gear draws close to worm screw, such as Fig. 7, shown in Figure 8, make worm gear 24 and tooth section 23 bonded area increasing between the two, to strengthen the torque of wrenches transmission.
In the first embodiment, worm gear 24 is connected on the wrench body by a straight pin 25, when spanner when pulling, what its worm gear 24, tooth section 23 were suffered is eccentric force, this power passes to worm gear 24 by tooth section 23, worm gear 24 is to be flexibly connected with rotating shaft 25 simultaneously, can have certain gap between the two.When the torsion of spanner was enough large, this torsion may cause the distortion of this axle 25, thereby spanner was lost efficacy, or rotated and have some setbacks.Worm gear 24 is placed on the square through hole 29 of spanner when interior, worm gear 24 and this through hole 29 are matched in clearance, in order to reduce rocking of worm gear 24, can add upper spring at an end of worm gear 24, but this matched in clearance can cause further the power of tooth section 23 to pass to straight pin 25.
In order to address the above problem, among the 3rd embodiment of the present utility model, increase by two T-slots 41 on through hole 39 both sides of wrench body, as shown in Figure 9; Both ends of the surface at worm gear 34 increase by two boss 45 simultaneously, as shown in figure 10.The torsion that worm gear 34 bears is strengthened in cooperation by this boss 45 and T-slot 41.In the present embodiment, because the existence of each parts gap of spanner, when spanner is stressed, have certain component and pass to worm gear, this component can be larger than the single thread of routine when adopting two screw thread, make the stressed further increasing of tooth section 23, the design of this structure can improve the component that worm gear bears on the one hand, has reduced simultaneously the requirement to quality of fit between other parts of spanner.
In other embodiments, the helix number of worm gear 24 can be 3.
More than describe preferred embodiment of the present utility model in detail.The ordinary skill that should be appreciated that this area need not creative work and just can make many modifications and variations according to design of the present utility model.Therefore, all in the art technical staff comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in claim protection domain of the present utility model.
Claims (9)
1. a monkey wrench comprises a wrench body and a worm gear;
Described wrench body comprises one handle and an operate portions;
Described operate portions comprises a fixed part, a movable part and a chute;
The lower end of described movable part is located in the chute, and the root edge of the lower end of described movable part is provided with tooth section;
Described operate portions also comprises a through hole, and described worm gear is located in the described through hole, and with the engagement of described tooth section;
When rotating described worm gear, described worm gear acts on described tooth section, so drive described movable part towards or move away from described fixed part;
Wherein, the form of thread of described worm gear is circular arc, and the top is provided with the oblique angle.
2. monkey wrench as claimed in claim 1 is characterized in that: scabble at the top of the described tooth section of the root edge of the lower end of described movable part.
3. monkey wrench as claimed in claim 1, it is characterized in that: the number of leads of described worm gear is 2.
4. monkey wrench as claimed in claim 1, it is characterized in that: described monkey wrench also comprises a bearing pin and a pin-and-hole, and described pin-and-hole is positioned on the described wrench body, and described bearing pin passes described pin-and-hole, axially be arranged in the described worm gear, described worm gear can rotate around described bearing pin.
5. monkey wrench as claimed in claim 4, it is characterized in that: an end of described bearing pin is concordant with the exit portion of described pin-and-hole.
6. such as claim 4 or 5 described monkey wrenches, it is characterized in that: described monkey wrench also comprises a spring, and described spring is between described worm gear and described wrench body, and described bearing pin axially is arranged in the described spring.
7. monkey wrench as claimed in claim 1, it is characterized in that: the cross section of described through hole is rectangle.
8. monkey wrench as claimed in claim 7, it is characterized in that: the both sides of described through hole have respectively a T-slot, the axial both ends of the surface of described worm gear have respectively a boss, and in the time of in described worm gear is installed in described through hole, described boss cooperates with described T-slot.
9. monkey wrench as claimed in claim 1 is characterized in that: described tooth section is semicircle, triangle or trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220021228 CN202640228U (en) | 2012-01-17 | 2012-01-17 | Adjustable spanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220021228 CN202640228U (en) | 2012-01-17 | 2012-01-17 | Adjustable spanner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202640228U true CN202640228U (en) | 2013-01-02 |
Family
ID=47409396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220021228 Expired - Lifetime CN202640228U (en) | 2012-01-17 | 2012-01-17 | Adjustable spanner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202640228U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104786177A (en) * | 2015-04-24 | 2015-07-22 | 上海昆杰五金工具有限公司 | Adjustable spanner |
| WO2016165490A1 (en) * | 2015-04-14 | 2016-10-20 | 杭州巨星工具有限公司 | Adjustable wrench |
-
2012
- 2012-01-17 CN CN 201220021228 patent/CN202640228U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016165490A1 (en) * | 2015-04-14 | 2016-10-20 | 杭州巨星工具有限公司 | Adjustable wrench |
| CN104786177A (en) * | 2015-04-24 | 2015-07-22 | 上海昆杰五金工具有限公司 | Adjustable spanner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |