CN202790357U - Tensioning gear - Google Patents
Tensioning gear Download PDFInfo
- Publication number
- CN202790357U CN202790357U CN 201220300241 CN201220300241U CN202790357U CN 202790357 U CN202790357 U CN 202790357U CN 201220300241 CN201220300241 CN 201220300241 CN 201220300241 U CN201220300241 U CN 201220300241U CN 202790357 U CN202790357 U CN 202790357U
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- China
- Prior art keywords
- hole
- tension device
- chain
- positioning screw
- pressing plate
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- 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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Abstract
The utility model relates to the technical field of cars and discloses a tensioning gear. The tensioning gear is used for maintaining chain tension and comprises a tensioner which comprises a press plate and a leaf spring. One side of the press plate is contacted with a chain and the other side of the press plate is contacted with the leaf spring. A first end of the press plate is movably connected on a main body of an engine and a second end of the press plate is provided with a hole. The tensioning gear further comprises a locating bolt pin which is fixed on a main engine body and is capable of moving relative to the hole. The locating bolt penetrates through the hole and a reinforcing rib is arranged on the periphery of the hole. Through relative movement of the locating bolts in the hole, the tensioning gear is driven by relative movement of the locating bolts in the hole to achieve moderate tension of the chain tension. Tensioning of the chain can be achieved only through the locating bolt pin fixed on main engine body and the hole of the second end of the press plate of the tensioning gear arranged. The simple structure of the tensioning gear facilitates assembly of spare parts and is capable of reducing cost.
Description
Technical field
The utility model belongs to automobile technical field, is specifically related to a kind of tension device.
Background technique
Past, for the transmissions such as the chain that transmits engine-driving axle power and belt are applied for the suitable tension force that carries out smoothly transmission of power with the annular flexible member, thereby and make the vibration of annular flexible member for the revolution change that prevents live axle causes the tension change of annular flexible member, setting can be adjusted the tension device of the tension force of annular flexible member automatically.
Fig. 1 is the structural representation of prior art tension device, existing chain stretching device comprises support member 1, flexible pressing plate 2 and sheet spring 3, flexible pressing plate 2 remains in cylinder block, and an end bearing is in support member 1, and with the chain sliding contact, the sheet spring is kept by pressing plate, by its elastic force flexible pressing plate 2 is pressed against on the chain 4, when chain 4 relaxes, by chain 4 tension device chain 4 is pressed, make chain 4 keep the tension force of appropriateness.But existing support member is and complex structure cast in block with cylinder body, and existing hollow out also has the labyrinths such as stiffening rib, occurs easily waste product in the cylinder casting process, has also increased the again expense of die sinking of the large mould of cylinder body.
The model utility content
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, thereby provides a kind of cost simple in structure low tension device.
For solving the problems of the technologies described above, the utility model provides following technological scheme:
A kind of tension device, this tension device is used for keeping chain tension, comprise stretcher, described stretcher comprises pressing plate and sheet spring, the one side of described pressing plate contacts with chain, the another side of pressing plate contacts with the sheet spring, and the first end of described pressing plate is movably connected on the motor main engine body, and the second end of described pressing plate arranges porose; This tension device also comprises: be fixed on the main engine body and can with the positioning screw latching of described hole relative movement, described positioning screw latching passes described hole; Described hole periphery is provided with stiffening rib.
Further, the track of described hole and the relative movement of positioning screw latching is a plane.
Further, described stiffening rib is dispersed setting along described hole.
Further, described hole is the long strip hole.
Further, described hole is higher than described hole near an end of sheet spring away from an end in the vertical direction of sheet spring.
Further, the long limit in described long strip hole is set to arc.
Further, described hole and positioning screw latching Spielpassung.
Further, described positioning screw latching comprise enlarged head, can be with the polished rod section of described hole relative movement, be used for being fixed on the screw section on the main engine body; Described polished rod section is positioned between enlarged head and the screw section.
Further, described hole is the long strip hole.
Further, the diameter of described enlarged head is greater than the interior spacing between the two long limits, described long strip hole.
Compared with prior art, the utlity model has following beneficial effect: the tension device that the utility model provides comprises the hole of pressing plate second end of the positioning screw latching that is fixed on the main engine body and stretcher, this positioning screw latching relative movement in described hole, by the relative movement of positioning screw latching in this hole, thereby drive the moderate tension that stretcher has been realized chain.Only need to arrange the hole of pressing plate second end of the positioning screw latching that is fixed on the main engine body and stretcher, just can realize the tensioning to chain, this simple structure is conducive to the assembling of component, and can reduce cost.Periphery is provided with stiffening rib in described hole, can avoid in movement process stressed when concentrated waist shaped hole tear.
Description of drawings
Fig. 1 is the structural representation of prior art tension device.
Fig. 2 is the structural representation of the utility model embodiment tension device.
Fig. 3 is the first structural representation of the utility model embodiment positioning screw latching.
Fig. 4 is the second structural representation of the utility model embodiment positioning screw latching.
Fig. 5 is the simple structural representation of the utility model embodiment stretcher when being in initial tension position.
Fig. 6 is the simple structural representation of the utility model embodiment stretcher when mediating.
Fig. 7 is the simple structural representation of the utility model embodiment stretcher when being in limit slack position.
Fig. 8 be among the utility model embodiment Fig. 5 A-A ' to generalized section.
Embodiment
Clearer for technical problem, technological scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The utility model discloses a kind of tension device, Fig. 2 is the structural representation of the utility model embodiment tension device; This tension device is used for keeping chain 10 tension force, comprise stretcher 11, described stretcher 11 comprises pressing plate 14 and sheet spring 15, the one side of described pressing plate 14 contacts with chain 10, the another side of pressing plate 14 contacts with sheet spring 15, and the first end 111 of described pressing plate 14 is movably connected on motor main engine body 20(cylinder body or cylinder cap) on, further, it is porose 13 that the second end 112 of described pressing plate 14 arranges, and this hole 13 is positioned at the end of described pressing plate 14; This tension device also comprises: be fixed in the positioning screw latching 12 on the main engine body 20, described positioning screw latching 12 passes described hole 13, but 13 relative positioning bolt pins, 12 motions of described hole.Present embodiment is by the relative movement of positioning screw latching 12 in this hole, thereby drive stretcher 11 has been realized the moderate tension of chain.Only need to arrange the hole of pressing plate second end of the positioning screw latching that is fixed on the main engine body and stretcher, just can realize the tensioning to chain, this simple structure is conducive to the assembling of component, and can reduce cost.In the present embodiment, described hole 13 is a plane with the track of positioning screw latching 12 relative movement; The first end 111 of described pressing plate 14 is positioned at main engine body in the bottom of vertical direction, and the second end 112 of pressing plate 14 is positioned at main engine body on the top of vertical direction, i.e. a side of close cylinder cap.
In the present embodiment, described hole 13 is set to the long strip hole, with the regional relative movement that makes things convenient for this positioning screw latching 12 and this long strip hole to limit in the long strip hole.The long limit in described long strip hole is set to arc, and preferred two long limits all are set to arc, and the direction of the direction of this arc-shaped bend and stretcher 11 bendings is substantially towards the same side.In the present embodiment, described hole 13 greater than the hole pitch in the near vertical direction, can guarantee that stretcher 11 with respect to the motion of positioning screw latching 12, is conducive to the stretching, extension of stretcher 11 in the hole pitch of level of approximation direction like this.
In the present embodiment, this hole 13 and positioning screw latching 12 Spielpassung, concrete is hole 13 on width direction with positioning screw latching 12 Spielpassung; And unnecessary rocking avoided producing less than or equal to 2mm in the gap; In the gap, by splash or drench under oil lubricating, and make the presser motion track can only be pressing plate camber line track.Described hole 13 is waist shaped hole in the present embodiment; So-called waist shaped hole i.e. substantial middle on the long limit in hole partly is provided with the section 132 that arches upward, as shown in Figure 5; The design of waist shaped hole so that the stretching, extension of stretcher 11 more freely.The requirement less than or equal to 2mm also will be satisfied in the gap that this waist shaped hole cooperates with the positioning screw latching.
In the present embodiment, described hole 13 peripheries are provided with stiffening rib 131, and described stiffening rib 131 is dispersed setting along described hole 13; This hole 13 is take waist shaped hole as example, and described stiffening rib 131 is dispersed setting along waist shaped hole; Can avoid in movement process stressed when concentrated waist shaped hole tear; As shown in Figure 5, the periphery that is arranged on hole 13 at stiffening rib 131 and groove 135 intervals, this hole structure along inwall 133 thickness of its axial direction outer ring 134 thickness along its axial direction greater than this hole structure, can guarantee that like this hole 13 and the track of positioning screw latching 12 relative movement are a plane, guarantee that hole 13 and positioning screw latching can relative movement resistance minimums.In the present embodiment, as shown in Figure 8, be among the utility model embodiment Fig. 5 A-A ' to generalized section; This hole structure along inwall 133 thickness of its axial direction outer ring 134 thickness along its axial direction greater than this hole structure, because the existence of stiffening rib 131 has prevented the situation that waist shaped hole may be torn in the movement process.In other embodiments, inwall 133 thickness of hole structure also can be less than or equal to the outer ring thickness of this hole structure, are in same plane and level and smooth as long as can guarantee the face at movement locus place in hole 13 and the positioning screw latching 12 relative movement processes.
Positioning screw latching 12 is fixed on main engine body 20(cylinder body or cylinder cap described in the utility model embodiment) upper and fall in the face that main engine body 20 is installed; The first structural representation of the utility model embodiment positioning screw latching such as Fig. 3; Positioning screw latching 12 comprises enlarged head 123, polished rod section 122, is used for being fixed on the screw section 121 on the main engine body; Described polished rod section 122 between enlarged head 123 and screw section 121, relatively polished rod section 122 motions of described hole 13; Three parts of positioning screw latching 12 are formed in one.Described hole and polished rod section Spielpassung.Polished rod section 122 cooperates with hole 13, has the gap between polished rod section 122 and the hole 13, concrete is hole 13 on width direction with the polished rod section described gap of 122 Spielpassung less than or equal to 2MM, avoid producing unnecessary rocking; In the gap, by splash or drench under oil lubricating, and make the presser motion track can only be pressing plate camber line track.Hole 13 in the present embodiment is the long strip hole, and the diameter of described enlarged head 123 is greater than the interior spacing L2 between the two long limits, described long strip hole.Enlarged head 123 is in order to prevent automobile in the process of moving, owing to vibrate so that pressing plate comes off.Can be that main engine body is welded to connect when positioning screw latching 12 is fixed on the main engine body, also can be one-body molded with main engine body.
Fig. 4 is the second structural representation of the utility model embodiment positioning screw latching; The structure of this positioning screw latching is on architecture basics as shown in Figure 3, and described positioning screw latching 12 is arranged with a lining 124, further, is arranged with described lining 124 in polished rod section 122; This lining 124 can be more convenient the relative movement of hole 13 and positioning screw latching 12, the working life in positioning screw latching 12 and hole 13 in the time of can also prolonging relative movement.In the specific embodiment, this lining 124 can closely be fixed together with polished rod section 122; Simultaneously, between lining 124 and hole 13, greasing substance is set, is conducive to the relative movement of positioning screw latching 12 in hole 13.Certainly, lining 124 also can rotate mutually with polished rod section 122, make lining 124 and hole 13 and and positioning screw latching 12 between can form mutual rotation, be conducive to equally the relative movement of positioning screw latching 12 in hole 13, the friction between the minimizing three.In addition, as another kind of embodiment, described lining also can be needle bearing, namely can a sheathed needle bearing in polished rod section 122, like this lining 124 and hole 13 and and positioning screw latching 12 between friction meeting in the relative movement process less.
In the present embodiment, as shown in Figure 2, the sheet spring 15 in the stretcher 11 can be one or more, is a plurality of such as chankings spring 15, and described tension device also comprised for fixing adding of a plurality of springs holds device 151.Be one such as chankings spring 15, then do not need to add and hold device 151.The two ends in hole 13 have certain height difference L1, and described hole 13 is higher than described hole 13 near an end of sheet spring 15 away from an end in the vertical direction of sheet spring 15.As shown in Figure 6, present embodiment mesopore 13 is waist shaped hole, described waist shaped hole is slightly higher than an end in the vertical direction of close sheet spring 15 away from an end of sheet spring 15, because the movement locus of pressing plate 14 the second ends has certain radian, and low behind the front height, this structure of waist shaped hole can be so that pressing plate in the external stressed minimum of the tensioning process that changes with chain, be eliminated unnecessary friction consumption.
In the tensioning process that stretcher 11 changes with chain, we it is generally acknowledged that stretcher has three kinds of positions: initial tension position, neutral position and limit slack position, limit slack position is the home position of sheet spring.Be initial tension position at the chain installation initial stage: the reverse compacted position of sheet spring pressing plate compresses chain in by stretcher, thereby make chain keep certain tensioning state, this moment, chain was active role power to the power of stretcher, and stretcher is passive reaction force to the power of chain, and the positioning screw latching 12 of this moment is arranged in hole 13 near an end of stretchers 11.And in work chain appears when lax after a period of time, stretcher is from being recovered to free state by pressure condition, compare the installation initial position, the maximum radian point of tensioning moves to the chain tension direction, thereby compression chain, guarantee the chain tension state, be the neutral position this moment, and the neutral position is the position between initial tension position and the limit slack position.Limit slack position is that acupressure probe is when no longer being subjected to the reaction force of timing chain during external force, the waist shaped hole of pressing plate the second end away from sheet spring one end against the position, namely the positioning screw latching 12 of this moment is arranged in hole 13 away from an end of stretcher 11, during limit slack position, pressing plate is in the reset condition of nature.
Below slightly higher as example than an end in the vertical direction of close sheet spring 15 away from an end of sheet spring 15 take waist shaped hole, above-mentioned each position is elaborated.
Initial tension position: Fig. 5 is the simple structural representation of the utility model embodiment stretcher when being in initial tension position; Namely initially be installed to the position on the motor, this moment, the radius of the radian of stretcher 11 was maximum; Stretcher 11 is passive stressed, at this moment, and the tensioning state when chain is in initial the installation, chain can slide along pressing plate, chain has certain tension force, and then chain has reaction force to pressing plate, and the end of close sheet spring of the waist shaped hole of pressing plate the second end is resisted against on the positioning screw latching.
Neutral position: Fig. 6 is the simple structural representation of the utility model embodiment stretcher when mediating; Along with the motor operation, chain has a little elongation or vibration, when chain is lax, stretcher is under the tension force of self, and pressing plate 14 is under the position-limiting action of positioning screw latching 12, and stretcher 11 moves upward along pressing plate 14 camber line tracks, make again tensioning of chain, have certain tension force, and the gradually development from initial tension position toward limit slack position, positioning screw latching 12 is positioned at the non-two end part of waist shaped hole at this moment; Described neutral position namely refers to the position between initial tension position and the limit slack position.Stretcher keeps the tension chain state always, and toward the development of stretcher reset condition, after chain was lax, stretcher was in passive stressed, and perhaps the active force state is decided on the chain elongation state.
Limit slack position: Fig. 7 is the simple structural representation of the utility model embodiment stretcher when being in limit slack position; Limit slack position is acupressure probe when no longer being subjected to the reaction force of chain during external force, the waist shaped hole of pressing plate the second end away from sheet spring one end against the position, this moment, the radius of the radian of stretcher 11 was maximum; During limit slack position, pressing plate is in the reset condition of nature.
Stretcher carries out tensioning through above three kinds of location statuss to chain, waist shaped hole in the pitch-row of the radian direction of stretcher motion from determining according to service life of chain, leaf spring material performance, waist shaped hole moves in the little limited range from stretcher is being tried one's best in the pitch-row of the radian direction of stretcher motion, make stretcher unsuitable excessive to chain tension, cross conference and reduce service life of chain; The waist shaped hole length direction is generally done design by tensioning state to the change direction of nature along the sheet spring.In the practical application, can be according to service life of chain and leaf spring material performance, two limit installation dimensions that the standard stretcher can move, and then definition waist shaped hole size.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. tension device, this tension device is used for keeping chain tension, comprise stretcher, described stretcher comprises pressing plate and sheet spring, the one side of described pressing plate contacts with chain, and the another side of pressing plate contacts with the sheet spring, and the first end of described pressing plate is movably connected on the motor main engine body, it is characterized in that the second end of described pressing plate arranges porose; This tension device also comprises: be fixed on the main engine body and can with the positioning screw latching of described hole relative movement, described positioning screw latching passes described hole; Described hole periphery is provided with stiffening rib.
2. tension device according to claim 1 is characterized in that, the track of described hole and the relative movement of positioning screw latching is a plane.
3. tension device according to claim 1 and 2 is characterized in that, described stiffening rib is dispersed setting along described hole.
4. tension device according to claim 1 is characterized in that, described hole is the long strip hole.
5. tension device according to claim 4 is characterized in that, described hole is higher than described hole near an end of sheet spring away from an end in the vertical direction of sheet spring.
6. tension device according to claim 4 is characterized in that, the long limit in described long strip hole is set to arc.
7. tension device according to claim 1 is characterized in that, described hole and positioning screw latching Spielpassung.
8. tension device according to claim 1 and 2 is characterized in that, described positioning screw latching comprise enlarged head, can be with the polished rod section of described hole relative movement, be used for being fixed on the screw section on the main engine body; Described polished rod section is positioned between enlarged head and the screw section.
9. tension device according to claim 8 is characterized in that, described hole is the long strip hole.
10. tension device according to claim 9 is characterized in that, the diameter of described enlarged head is greater than the interior spacing between the two long limits, described long strip hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220300241 CN202790357U (en) | 2012-06-26 | 2012-06-26 | Tensioning gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220300241 CN202790357U (en) | 2012-06-26 | 2012-06-26 | Tensioning gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202790357U true CN202790357U (en) | 2013-03-13 |
Family
ID=47817623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220300241 Expired - Lifetime CN202790357U (en) | 2012-06-26 | 2012-06-26 | Tensioning gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202790357U (en) |
-
2012
- 2012-06-26 CN CN 201220300241 patent/CN202790357U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BYD AUTOMOBILE INDUSTRY CO., LTD. Free format text: FORMER NAME: SHENZHEN BYD AUTO CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: BYD 518118 Shenzhen Road, Guangdong province Pingshan New District No. 3009 Patentee after: BYD AUTO Co.,Ltd. Address before: BYD 518118 Shenzhen Road, Guangdong province Pingshan New District No. 3009 Patentee before: SHENZHEN BYD AUTO R&D Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
|
| CX01 | Expiry of patent term |