CN106235724B - Angle adjusting device and seat with same - Google Patents
Angle adjusting device and seat with same Download PDFInfo
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- CN106235724B CN106235724B CN201610814159.6A CN201610814159A CN106235724B CN 106235724 B CN106235724 B CN 106235724B CN 201610814159 A CN201610814159 A CN 201610814159A CN 106235724 B CN106235724 B CN 106235724B
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
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- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Seats For Vehicles (AREA)
Abstract
The application discloses an angle adjusting device, which comprises a ratchet wheel with inner teeth at the inner ring, a sliding block with outer teeth, a swelling and shrinking mechanism and a chute plate which is coaxially arranged with the ratchet wheel and can rotate relatively, wherein the swelling and shrinking mechanism is used for controlling the sliding blocks to move along the radial direction of the chute plate, and the swelling and shrinking mechanism can simultaneously push all the sliding blocks to extend along the radial direction so as to enable all the outer teeth to be abutted or clamped with the inner teeth and lock all the sliding blocks; and m sliding blocks are formed by sliding blocks, m=5 or 6, wherein the sliding blocks comprise a basic sliding block set and m-1 offset sliding block sets, the external teeth of the offset sliding block sets are provided with an angle offset of 360/n degrees around the central axis of the ratchet wheel relative to the external teeth of the basic sliding block set. The device can realize safe and stable stepless adjustment of the angle, and the application also discloses a seat comprising the angle adjusting device, and the adjusting process is safe and reliable.
Description
Technical Field
The application relates to the technical field of mechanical design, in particular to an angle adjusting device. In addition, the application also relates to a seat comprising the angle adjusting device.
Background
In order to adapt to the use demands of different users in the use process of the seat, the angle between the backrest and the seat can be adjusted, and along with the development of the mechanical industry, higher requirements are put on the precision of the seat angle adjusting device.
In the prior art, the seat angle adjusting device comprises a plurality of groups of sliding block groups with phase differences, a group of sliding blocks is selected to be meshed with the ratchet wheel in use, so that the aim of improving the adjusting precision is fulfilled, but the adjusting precision is directly related to the number of the arranged sliding block groups, the improvement of the precision is realized by completely increasing the number of the sliding blocks, the cost of the device is consumed, the weight of the angle adjuster is increased, the adjusting precision is very limited, and the stepless adjustment of the angle cannot be realized.
In summary, how to provide a high-precision angle adjusting device is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present application is to provide an angle adjusting device that has high adjustment accuracy and can realize stepless adjustment of an angle.
Another object of the present application is to provide a seat comprising the above angle adjusting device.
In order to achieve the above object, the present application provides the following technical solutions:
the angle adjusting device comprises a ratchet wheel with inner teeth on an inner ring, a sliding block with outer teeth, a collapsible mechanism and a chute plate which is coaxially arranged with the ratchet wheel and can rotate relatively, wherein the collapsible mechanism is used for controlling the sliding block to move radially along the chute plate so as to enable the outer teeth to be meshed with and separated from the inner teeth, and the collapsible mechanism can lock and unlock the sliding block; the ratchet wheel is provided with n internal teeth; the expanding and contracting mechanism can push each sliding block to extend out along the radial direction at the same time so as to enable all the external teeth to be abutted or clamped with the internal teeth and lock all the sliding blocks;
m sliding block groups consisting of the sliding blocks, wherein m=5 or 6 comprises a basic sliding block group and m-1 shifting sliding block groups, wherein the external teeth of the shifting sliding block groups have angle offset around the central axis of the ratchet wheel relative to the external teeth of the basic sliding block groups, the angle offset is (Z+k/m) 360/n degrees, Z, m, n and k are integers, and k is more than or equal to 1 and less than or equal to m-1, and k values of the angle offset calculated by the shifting sliding block groups are different;
when m=5, the external teeth of the two slider groups adjacent in the circumferential direction have an adjacent angular offset amount about the central axis, the adjacent angular offset amount being (Z 1 +k/m) 360/n degrees, where Z 1 N is an integer, k=2; the external teeth of the two slider groups circumferentially spaced one slider have angular offset about the central axis, the angular offset being (Z 2 +1/m) 360/n degrees, where Z 2 N is the number of the internal teeth, and n is an integer;
when m=6, the external teeth of two of the slider groups adjacent in the circumferential direction have an adjacent angular offset amount about the central axis, the adjacent angular offset amount being (Z 1 +k/m) 360/n degree, wherein Z 1 N is an integer, k=2 or 3; the external teeth of the two slider groups circumferentially spaced one slider have angular offset about the central axis, the angular offset being (Z 2 +k/m) 360/n degrees, where Z 2 And n is the number of the internal teeth, and k=1 or 2.
Preferably, the contact strength of the inner teeth and the outer teeth is greater than the contact strength of the radial sliding grooves of the sliding groove plate and the sliding block.
Preferably, the outer teeth of two circumferentially adjacent slide block groups are circumferentially separated by an angle ranging from 360/m-10 degrees to 360/m+10 degrees.
Preferably, when the number m=5 of the sliding block sets, the angle offset between the external teeth of the basic sliding block set and the external teeth of the offset sliding block set in the clockwise direction is sequentially: (Z+2/5) 360/n degrees, (Z+4/5) 360/n degrees, (Z+1/5) 360/n degrees and (Z+3/5) 360/n degrees; wherein Z is an integer, n is the number of the internal teeth, and n is an integer.
Preferably, when the number m=6 of the sliding block sets, the angle offset between the external teeth of the basic sliding block set and the external teeth of the offset sliding block set in the clockwise direction is sequentially: (Z+4/6) 360/n degrees, (Z+1/6) 360/n degrees, (Z+3/6) 360/n degrees, (Z+5/6) 360/n degrees and (Z+2/6) 360/n degrees;
or, (Z+3/6) 360/n degrees, (Z+5/6) 360/n degrees, (Z+1/6) 360/n degrees, (Z+4/6) 360/n degrees and (Z+2/6) 360/n degrees in this order;
or, (Z+4/6) 360/n degrees, (Z+2/6) 360/n degrees, (Z+5/6) 360/n degrees, (Z+1/6) 360/n degrees and (Z+3/6) 360/n degrees in this order;
or, (Z+3/6) 360/n degrees, (Z+1/6) 360/n degrees, (Z+5/6) 360/n degrees, (Z+2/6) 360/n degrees and (Z+4/6) 360/n degrees in this order;
or, (Z+2/6) 360/n degrees, (Z+4/6) 360/n degrees, (Z+1/6) 360/n degrees, (Z+5/6) 360/n degrees and (Z+3/6) 360/n degrees in this order;
or, (Z+2/6) 360/n degrees, (Z+5/6) 360/n degrees, (Z+3/6) 360/n degrees, (Z+1/6) 360/n degrees and (Z+4/6) 360/n degrees in this order;
wherein Z is an integer, n is the number of the internal teeth, and n is an integer.
The seat comprises a seat back, a seat basin and an angle adjusting device for adjusting the relative angle of the seat back and the seat basin, wherein the angle adjusting device is any one of the angle adjusting devices.
According to the angle adjusting device provided by the application, the angle offset enables each sliding block and the ratchet wheel to have different meshing states, each sliding block group divides the degree of one internal tooth into m parts to form m phases, and different sliding block groups are correspondingly arranged with the internal tooth by different phases, so that when all the sliding blocks extend outwards, the external teeth of different sliding blocks are clamped with the internal tooth by different phases. When all the sliding blocks are extended outwards and clamped, different external teeth can be respectively clamped or abutted with the internal teeth in a way of being completely meshed, semi-meshed or combined in a way of tooth-to-tooth multiple conditions, so that the position of a ratchet wheel is fixed, and stepless adjustment of the angle of the ratchet wheel is realized.
Because each sliding block group has angular offset, the phase difference between two adjacent sliding block groups is larger, the phase difference between the two sliding block groups and the ratchet wheel is larger, the phase difference between two sliding block groups which are separated or far away from each other is smaller, the phase difference between the two sliding block groups and the ratchet wheel is smaller, and the meshing degree is closer. After the plurality of slide block groups with high meshing degree are oppositely arranged or form a triangular arrangement mode, the stress of the angle adjusting device can be more balanced, and the positions with larger stress generated between the slide blocks and the ratchet wheel can be uniformly dispersed in the circumferential direction so as to avoid damage after the pressure concentration of the slide blocks and the ratchet wheel.
The application also provides a seat comprising the angle adjusting device, and the angle adjusting device specifically comprises a seat back, a seat basin and the angle adjusting device, so that the stepless adjustment of the angle of the seat back can be realized, and the adjustment is safe and reliable.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is an exploded view of an embodiment of an angle adjusting device according to the present application;
FIG. 2 is a cross-sectional view of a first embodiment of an angle adjustment device according to the present application;
FIG. 3a is a schematic view of a portion of the slider of FIG. 2A;
FIG. 3B is a schematic view of a portion of the slider B of FIG. 2;
FIG. 4 is a cross-sectional view of a second embodiment of an angle adjusting device according to the present application;
FIG. 5 is a cross-sectional view of a third embodiment of an angle adjusting device according to the present application;
FIG. 6a is a schematic view of a portion of the slider of FIG. 5A;
FIG. 6B is a partial schematic view of the slider B of FIG. 5;
FIG. 6C is a partial schematic view of the C slider of FIG. 5;
FIG. 6D is a partial schematic view of the D slider of FIG. 5;
FIG. 6E is a partial schematic view of the E slider of FIG. 5;
fig. 7 is a cross-sectional view of a fourth embodiment of an angle adjusting device according to the present application.
In the above figures 1-7:
1 is a sheath, 2 is a ratchet wheel, 22 is an internal tooth, 3 is an unlocking cam, 4 is a sliding block, 42 is an external tooth, 5 is an elastic piece, 6 is a wedge block, 7 is a central shaft, 8 is a chute plate, and 84 is a flange;
in fig. 2, 4 and 5, a is a slider, B is a slider, C is a slider, D is a slider, and E is a slider.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The core of the application is to provide an angle adjusting device, which has high adjusting precision and can realize stable and reliable angle stepless adjustment. Another core of the present application is to provide a seat comprising the above-mentioned angle adjusting device.
Referring to fig. 1 to 7, fig. 1 is an exploded view of an embodiment of an angle adjusting device according to the present application; FIG. 2 is a cross-sectional view of a first embodiment; FIGS. 3a and 3B are partial schematic views of the A and B sliders of FIG. 2, respectively; FIGS. 4 and 5 are cross-sectional views of second and third embodiments, respectively; FIGS. 6a to 6E are partial schematic views of the sliders A to E of FIG. 5, respectively; fig. 7 is a cross-sectional view of a fourth embodiment of an angle adjusting device according to the present application.
The angle adjusting device provided by the application is mainly used for adjusting the angle of the chair back and can be used for other angle adjusting positions. The angle adjusting device mainly comprises a ratchet wheel 2, a sliding block 4, a collapsible mechanism and a sliding groove plate 8, wherein the collapsible mechanism is used for controlling the sliding block 4 to move along the sliding groove plate 8 in the radial direction so as to enable the external teeth 42 of the sliding block 4 to be meshed with and separated from the internal teeth 22 of the ratchet wheel 2, and the collapsible mechanism can lock and unlock the sliding block 4.
The ratchet wheel 2 is provided with n internal teeth 22, and the degrees of the internal teeth 22 are 360/n; the expanding and contracting mechanism can push each slide block 4 to extend out along the radial direction at the same time, so that all the external teeth 42 are abutted or clamped with the internal teeth 22, and all the slide blocks 4 can be locked.
When m=5 or 6, the sliding block group consists of m basic sliding block groups and m-1 offset sliding block groups, wherein the external teeth 42 of the offset sliding block groups have angular offset around the central axis 7 of the ratchet wheel 2 relative to the external teeth 42 of the basic sliding block groups, the angular offset is (Z+k/m) 360/n degrees, Z, m, n and k are integers, k is more than or equal to 1 and less than or equal to m-1, and k values of the calculated angular offset of the respective offset sliding block groups are different. Alternatively, m may, of course, be a value other than 5 or 6, and the corresponding angular offset may need to be adjusted.
When m=5, the external teeth of the two slider groups adjacent in the circumferential direction have an adjacent angular offset amount about the central axis, the adjacent angular offset amount being (Z 1 +k/m) 360/n degrees, where Z 1 N is an integer, k=2, the external teeth of two groups of blocks circumferentially spaced apart by one block have an angular offset about the central axis, the angular offset being (Z 2 +1/m) 360/n degrees, where Z 2 N is the number of internal teeth, n is an integer;
when m=6, the external teeth of the two slider groups adjacent in the circumferential direction have an adjacent angular offset amount about the central axis, the adjacent angular offset amount being (Z 1 +k/m) 360/n degrees, where Z 1 N is an integer, k=2 or 3; the external teeth of the two groups of two circumferentially spaced apart sliders have an angular offset about the central axis of (Z 2 +k/m) 360/n degrees, where Z 2 N is an integer, and k=1 or 2 is the number of internal teeth.
Optionally, when the number m of the slide block groups is equal to or greater than 7, the external teeth of two slide block groups adjacent in the circumferential direction have adjacent angular offset amounts around the central axis 7, the adjacent angular offset amounts being (Z 1 +k/m) 360/n degrees, where Z 1 And m, n and k are integers, and k is more than or equal to 2 and less than or equal to m-2.
It should be noted that the ratchet 2 is an internal tooth ratchet, usually in a ring structure, and the inner tooth 22 is provided on the inner ring surface, and the internal teeth 22 are continuous and identical, and the tooth profile extends radially from the inner ring surface toward the central axis 7 of the ratchet 2. The inner ring of the ratchet wheel 2 is provided with n inner teeth 22, the degrees of the inner teeth 22 are 360/n, the included angle between every two adjacent teeth is 360/n, the degrees of the inner teeth 22 refer to the central angle degrees occupied by the inner teeth 22 in the circumferential direction of the ratchet wheel 2, that is, the n inner teeth 22 are uniformly arranged in the circumferential direction. The specific configuration of the internal teeth 22 may be selected from those commonly used in the art.
The plurality of sliding blocks 4 which can slide along the radial direction of the ratchet wheel 2 are arranged on the chute plate 8 which is coaxially arranged with the ratchet wheel 2, the outer teeth 42 which face the ratchet wheel 2 are arranged on each sliding block 4, and the outer teeth 42 have the same structure and can be meshed with the inner teeth 22. The above-mentioned several sliders 4 form m slider groups, each of which may be composed of one, two or more sliders 4. The m slide block groups comprise a basic slide block group and m-1 offset slide block groups, the slide block groups are distributed along the circumference of the chute plate 8, and the external teeth 42 of the slide block 4 face the internal teeth 22 of the ratchet wheel 2.
The external teeth 42 of the slide blocks 4 in the offset slide block group have an angular offset about the central axis 7 of the ratchet wheel 2 with respect to the external teeth 42 of the slide blocks 4 in the base slide block group, and the angular offset in the present application refers to an angular difference between the external teeth 42 of each slide block 4 of the offset slide block group and the external teeth 42 of the slide block 4 of the base slide block group in the circumferential direction, which is composed of a multiple of the number of whole teeth of the external teeth 42 and a phase difference of the external teeth 42. The angle offset between the external teeth 42 of each sliding block set and the external teeth 42 of the basic sliding block set is (Z+v/m) 360/n degrees, wherein v is greater than or equal to 1 and less than or equal to m-1, and the v calculated angle offset of each sliding block set is different, that is, different v values are selected for calculating the angle offset corresponding to different sliding block sets and cannot be repeatedly selected. The selection of the integer Z can be a random selection quantity, and is mainly determined according to the number of the sliding block groups.
In order to avoid uneven stress and local damage, and ensure the contact strength of the sliding block 4 and the ratchet wheel 2, further, the sliding blocks 4 with different meshing degrees need to be uniformly distributed in the circumferential direction as much as possible.
The degree of each tooth of the ratchet wheel 2 is a=360/n, a is generally about 2 °, and the basic phase difference is a/m provided that the angle adjusting device is provided with m sets of sliders 4, and the tooth relative angle of each slider 4 in the same set is substantially Pa (P is an integer).
It should be noted that when the number of the sliding block sets m=2, the distance between the basic sliding block set and the external sliding block teeth of the offset sliding block set is still (z+1/2) 360/n, and when the number of the sliding block sets m=3, the distance between the basic sliding block set and the external sliding block teeth of the offset sliding block set is still (z+1/3) 360/n.
In this embodiment, the basic phase difference is mainly that the phase difference between adjacent sliders 4 is approximately equal to k times (k is an integer greater than or equal to 2), so that the meshing degree of adjacent sliders 4 is greatly different, and the meshing degree of sliders 4 at opposite positions is close to each other, so that the stress of the angle adjusting device is balanced. Specifically, the sliders 4 having a relatively close degree of engagement are positioned as far as possible, or a triangular layout can be formed.
Optionally, Z in the calculation of the adjacent angle offset 1 The selection range and the requirement of the ratchet wheel 2 need to be satisfied, so that all the sliding blocks 4 are uniformly distributed in the circumferential direction as much as possible, and the uniform distribution can lead to balanced stress of the ratchet wheel 2.
It should be noted that the basic set of sliders and the offset set of sliders of the present application are not structurally different, but merely have a phase difference in combination with the ratchet 2. The device comprises a basic sliding block set and at least one offset sliding block set, namely, the number m of the sliding block sets is larger than or equal to two. In addition, the sliders 4 of the same offset slider group may have an angular interval of an integer multiple of the internal teeth 22 in the circumferential direction, but have no phase difference.
Alternatively, the sliding blocks 4 may be disposed in radial sliding grooves 82 on the sliding groove plate 8, and a plurality of sliding grooves 82 are disposed on the sliding groove plate 8.
Optionally, the selection of the integer Z in the above formula for calculating the angular offset affects the multiple of the whole teeth between the sliders 4, and in order to make the engagement between each slider 4 and the ratchet 2 as stable as possible, the selection principle of Z is to make each slider 4 uniformly distributed in the circumferential direction as much as possible.
The collapsible mechanism may be a cam mechanism in the existing angle adjusting device, but in particular, the collapsible mechanism of the present application needs to be able to push all the sliders 4 out in the radial direction at the same time, during which all the sliders 4 can abut or be clamped with the internal teeth 22 of the ratchet 2, and the collapsible mechanism is also able to lock the positions of all the sliders 4 that are in contact with the ratchet 2, so that the sliders 4 do not back up due to the pressure of the ratchet 2. That is, the contact surface of the expanding and contracting mechanism and the sliding block is in a self-locking state no matter the teeth of the ratchet wheel 2 and the sliding block 4 are in a complete meshing state, a half meshing state or a tooth-to-tooth state.
In the solution provided in this embodiment, the angle offset makes each slide block 4 and the ratchet 2 have different engagement states, each slide block group divides the degree of one internal tooth 22 into m parts, so as to form m phases, and different slide block groups are correspondingly arranged with the internal tooth 22 with different phases, so that when all slide blocks 4 extend outwards, the external teeth 42 of different slide blocks 4 are clamped with the internal tooth 22 with different phases. When all the sliding blocks 4 are extended and clamped, different external teeth 42 can be respectively clamped or abutted with the internal teeth 22 in a full-meshed, half-meshed or tooth-to-tooth combination mode, no matter the ratchet wheel 2 rotates to any angle, the sliding blocks 4 can be clamped with the ratchet wheel 2, and in the full-stroke range of the meshing of the internal teeth 22 and the external teeth 42, the expanding and contracting mechanism can simultaneously push all the sliding blocks 4 to extend radially and lock the positions of all the sliding blocks 4, so that the sliding blocks cannot be retracted under the pressure of the ratchet wheel 2, the position of the ratchet wheel 2 is fixed, and stepless adjustment of the angle of the ratchet wheel 2 is realized.
Because each sliding block group has angular offset, the phase difference of two adjacent sliding block groups is larger, the phase difference of the two sliding block groups and the ratchet wheel is larger, the phase difference of the two sliding block groups which are separated or far away from each other is smaller, the phase difference of the two sliding block groups and the ratchet wheel 2 is smaller, and the meshing degree is closer. It can be known that, after the several slide blocks with high engagement degree are relatively arranged or form a triangle arrangement mode, the stress of the angle adjusting device can be more balanced, and the position with larger stress generated between the slide block 4 and the ratchet wheel 2 can be more uniformly dispersed in the circumferential direction, so that the damage of the slide block 4 and the ratchet wheel 2 after the pressure concentration is generated is avoided.
It should be noted that the adjacent angle offset includes an integer multiple 360Z of the full tooth angle of the internal teeth 22 1 It is understood that the phase difference between the two slide blocks is obtained by the angular offset of each of the two offset slide blocks from the reference slide block, and that the slide blocks having different engagement degrees can be arranged as adjacently as possible in the circumferential direction when the phase difference between the adjacent slide blocks is twice or three times the base phase difference in general.
In a specific embodiment of the present application, when the number m=5 of the sliding block sets, four offset sliding block sets are sequentially arranged in the circumferential direction clockwise direction of the base sliding block set; the angle offset of the external teeth 42 of the basic sliding block set and the external teeth 42 of the clockwise offset sliding block set is (Z+2/5) 360/n degrees, (Z+4/5) 360/n degrees, (Z+1/5) 360/n degrees and (Z+3/5) 360/n degrees in sequence; wherein Z is an integer, n is the number of internal teeth, and n is an integer.
Specifically, the external teeth 42 of the base slider group are angularly offset from the external teeth 42 of the first offset slider group in the clockwise direction by (Z+2/5) 360/n degrees.
The outer teeth 42 of the basic slider group are angularly offset from the outer teeth 42 of the second offset slider group in the clockwise direction by (Z + 4/5) 360/n degrees.
The outer teeth 42 of the basic slider group are angularly offset from the outer teeth 42 of the third offset slider group in the clockwise direction by (z+1/5) 360/n degrees.
The outer teeth 42 of the basic slider group are angularly offset from the outer teeth 42 of the fourth offset slider group in the clockwise direction by (z+3/5) 360/n degrees.
It should be noted that, Z in the above-mentioned angular offset is an integer, any value may be taken, and when calculating for each offset sliding block set, the Z value may be different, and the selection principle of Z may be that the sliding block sets are distributed uniformly as much as possible in the circumferential direction.
Referring to fig. 5 to 6E, it can be seen that the embodiment uses the a slider as the base slider set, the B slider is the first offset slider set of the a slider in the clockwise direction, the C slider is the second offset slider set of the a slider in the clockwise direction, the D slider is the third offset slider set of the a slider in the clockwise direction, and the E slider is the fourth offset slider set of the a slider in the clockwise direction.
The two basic phase differences between the external teeth 42 of the adjacent sliding blocks can be obtained, namely, the situation that the meshing degree of the adjacent sliding blocks 4 is larger is formed, so that the sliding blocks 4 with relatively close meshing degrees are arranged at relatively distant positions in the circumferential direction, and a stable triangular state or a stable uniform distribution state can be formed.
Further based on the aboveThe external teeth 42 of the two slider groups circumferentially spaced apart by one slider have an angular offset about the central axis 7 of (Z 2 +1/m) 360/n degrees, where Z 2 M is the number of the sliding block groups, n is the number of the internal teeth, and m and n are integers.
In the embodiment, the two sliding blocks which are relatively close to the meshing degree of the ratchet wheel 2 are arranged in a spaced mode, so that the sliding blocks 4 and the ratchet wheel 2 can be stably arranged, the meshing and clamping positions are uniformly stressed, and the sliding blocks 4 or the ratchet wheel 2 are not easy to damage.
On the basis of any one of the above embodiments, the contact strength of the internal teeth 22 and the external teeth 42 is greater than the contact strength of the radial sliding grooves of the sliding groove plate 8 and the slider 4.
In the seat angle adjusting process, when the inner teeth 22 are in contact and clamping connection with the outer teeth 42 and the load of the ratchet wheel 2 is large, the sliding groove 82 is easy to deform compared with the ratchet wheel 2 due to low contact strength, so that at least half of the outer teeth 42 in the circumferential direction can be in deeper meshing or clamping connection with the inner teeth 22, and safety of passengers is ensured.
On the basis of any one of the embodiments, the outer teeth of two circumferentially adjacent slide block groups are circumferentially separated by an angle ranging from 360/m-10 degrees to 360/m+10 degrees. The whole gear multiple is not limited in the above embodiments, namely Z, Z in the process of calculating the angle offset, the adjacent angle offset and the spaced angle offset 1 And Z 2 The selection is, without limitation, a random selection, and the selection principle is to keep the sliders 4 uniformly distributed as much as possible in the circumferential direction. In general, Z, Z can be used to keep the sliders 4 uniformly distributed in the circumferential direction 1 And Z 2 Approximately equal to 360/m or integer multiples of 360/m, i.e. 360u/m, u is a non-zero integer, which ensures that the respective sliders 4 are substantially uniformly distributed, but since the sliders according to the present application have a phase shift between them, the range is set to 360/m-10 degrees to 360/m+10 degrees, which should be able to meet the requirement of angular shift.
On the basis of any one of the above embodiments, the number of the sliders 4 in the slider group needs to be limited for different numbers of slider groups.
When the number of the sliding block sets m=2, please refer to fig. 2 to 3B, namely, the case of including 2 sliding block sets (a sliding block set and B sliding block set), each sliding block set may include three sliding blocks 4; the outer teeth 42 of the group B sliders are offset from the outer teeth 42 of the group A sliders by an integer number of teeth to a further 1/2 of the pitch.
Optionally, three sliding blocks of the group A are uniformly distributed at intervals of 120 degrees in circumference, and three sliding blocks of the group B are uniformly distributed at intervals of 120 degrees in circumference.
Alternatively, each set of slides may comprise only one slide 4, or only two slides 4, but in practice three slides 4 are found to be most stable. In addition, in order to ensure balanced stress and to simplify the manufacturing process of the chute plate, the number of teeth of the ratchet wheel 2 is preferably an integer multiple of 3.
Referring to fig. 3a to 3B, the a slider and the ratchet 2 are in a fully engaged state, and the B slider and the ratchet 2 are in a tooth alignment state, respectively. Of course, there may be a case where the a slider is in a right engagement state with the ratchet 2 and the B slider is in a left engagement state with the ratchet 2. In the two clamping states, the ratchet wheel 2 cannot rotate, a bi-directional staggered tooth state is formed, a gap between the sliding block 4 and the sliding groove 82 can be eliminated at the same time, the stability of the sliding block is further ensured, and the stable positioning of the ratchet wheel 2 is realized.
When the number of the sliding block sets m=3, please refer to fig. 4, the sliding block set shown in fig. 4 includes 3 sliding block sets, namely, an a sliding block set, a B sliding block set and a C sliding block set, each sliding block set includes two to three sliding blocks 4.
When the number m of the sliding block sets is greater than or equal to 4, taking m=5 as an example, please refer to fig. 5, the sliding block set shown in fig. 5 includes 5 sliding block sets, namely, an a sliding block set, a B sliding block set, a C sliding block set, a D sliding block set and an E sliding block set, and each sliding block set may include one sliding block. Fig. 6a to 6E show the engagement of the a to E slides with the ratchet wheel 2, respectively.
Taking m=6 as an example, please refer to fig. 7, fig. 7 shows that the slide block set includes 6 slide block sets, namely, a slide block set, B slide block set, C slide block set, D slide block set, E slide block set and F slide block set, and each slide block set may include one slide block.
In one embodiment provided by the application, on the basis of any one of the embodiments, the number m=6 of the sliding block sets is specifically set, and five offset sliding block sets are sequentially arranged in the circumferential direction clockwise of the basic sliding block set.
Embodiment one: the angle offset of the external teeth of the basic sliding block set and the external teeth of the clockwise offset sliding block set is (Z+4/6) 360/n degrees, (Z+1/6) 360/n degrees, (Z+3/6) 360/n degrees, (Z+5/6) 360/n degrees and (Z+2/6) 360/n degrees in sequence.
Embodiment two: the angle offset of the external teeth of the basic sliding block set and the external teeth of the clockwise offset sliding block set is (Z+3/6) 360/n degrees, (Z+5/6) 360/n degrees, (Z+1/6) 360/n degrees, (Z+4/6) 360/n degrees and (Z+2/6) 360/n degrees in sequence.
Embodiment III: the angle offset of the external teeth of the basic sliding block set and the external teeth of the clockwise offset sliding block set is (Z+4/6) 360/n degrees, (Z+2/6) 360/n degrees, (Z+5/6) 360/n degrees, (Z+1/6) 360/n degrees and (Z+3/6) 360/n degrees in sequence.
Embodiment four: the angle offset of the external teeth of the basic sliding block set and the external teeth of the clockwise offset sliding block set is (Z+3/6) 360/n degrees, (Z+1/6) 360/n degrees, (Z+5/6) 360/n degrees, (Z+2/6) 360/n degrees and (Z+4/6) 360/n degrees in sequence.
Fifth embodiment: the angle offset of the external teeth of the basic sliding block set and the external teeth of the clockwise offset sliding block set is (Z+2/6) 360/n degrees, (Z+4/6) 360/n degrees, (Z+1/6) 360/n degrees, (Z+5/6) 360/n degrees and (Z+3/6) 360/n degrees in sequence.
Embodiment six: the angle offset of the external teeth of the basic sliding block set and the external teeth of the clockwise offset sliding block set is (Z+2/6) 360/n degrees, (Z+5/6) 360/n degrees, (Z+3/6) 360/n degrees, (Z+1/6) 360/n degrees and (Z+4/6) 360/n degrees in sequence.
In the above six modes, Z is a randomly selected integer, n is the number of internal teeth, and n is an integer. For Z, please refer to the above embodiment, that is, when m=6 and a=1, Z may be selected to be 60 or an integer multiple of 60.
It should be noted that the above calculation formulas may be not reduced to the simplest, so that the base phase difference description is more clear, and those skilled in the art may reduce or reduce the above calculation formulas in the implementation process.
It should be noted that the sliding blocks 4 may be located in the same plane, and the axial thickness is kept consistent, so that the balancing and the stress balancing of the angle adjusting device are facilitated. Alternatively, each of the above-described sliders may have a drop or an offset in the axial direction.
Optionally, on the basis of any of the above embodiments, a sheath 1 is provided outside the ratchet 2 to protect the rotation of the ratchet 2. The ratchet 2 includes a ratchet outer circle and internal teeth 22 provided on the ratchet outer circle 21.
Alternatively, the expanding and contracting mechanism in each embodiment includes the flange 84, the unlocking member, the wedge blocks 6 arranged in one-to-one correspondence with the sliding blocks 4, and the elastic members 5 in one-to-one correspondence with the wedge blocks 6.
The flange 84 is disposed coaxially with the runner plate 8, the flange 84 may be fixed to the runner plate 8, the wedge 6 is disposed between the flange and the slider 4 in a radial direction, and the wedge 6 and the flange 84 are abutted in a circumferential direction by the elastic member 5 in a compressed state.
The contact surface of the wedge block 6 and the sliding block 4 is a self-locking surface capable of enabling the sliding block 4 to retract radially when the wedge block 6 compresses the elastic member 5 to move, or the contact surface of the wedge block 6 and the flange 84 is a self-locking surface capable of enabling the sliding block 4 to retract radially when the wedge block compresses the elastic member 5 to move. The unlocking member is used for pushing the wedge block to release the self-locking and driving the sliding block 4 to retract radially so as to separate the inner teeth 22 from the outer teeth 42.
In use, the elastic member 5 drives the wedge 6 circumferentially about the flange 84, through the wedge self-locking surface into contact with the slide self-locking surface, driving the slide 4 radially outwardly along the slide guide surface of the slide 8 until the outer teeth 42 are in contact with the inner teeth 22, including the full engagement, half engagement and tooth-to-tooth engagement of the outer teeth 42 with the inner teeth 22. In the full stroke range where the external teeth 42 mesh with the internal teeth 22, the external teeth 42 and the internal teeth 22 are in a tooth tip-to-tooth tip state, and the wedge self-locking surface and the slider self-locking surface are kept in contact and form self-locking. Similarly, in the locked state, the wedge rotating surface and the flange circumferential surface are always kept in contact and form self-locking.
In the angle adjusting device provided in this embodiment, each slider 4 is driven by an independent wedge block 6 and an independent elastic member 5, and in the whole process from tooth-to-tooth engagement of the external teeth 42 and the internal teeth 22 to complete engagement in the locking process, the wedge self-locking surface is always self-locking with the slider self-locking surface, and when the ratchet 2 is loaded, radial retraction of the slider 4 does not occur.
On the basis of any one of the embodiments, the sliding block 4 is provided with an axial sliding block boss, and the wedge block 6 is provided with an axial wedge block boss; the unlocking piece and the chute plate 8 are coaxially arranged, a sliding block control groove matched with a sliding block boss and a wedge block control groove matched with a wedge block boss are formed in the unlocking piece, and the wedge block 6 can compress the elastic piece 5 and enable the sliding block to retract radially when the unlocking piece rotates along the unlocking direction.
Specifically, the unlocking piece is an unlocking cam 3 which is coaxially arranged with the chute plate 8 and can rotate relatively, a sliding block control groove and a wedge block control groove are arranged on the unlocking cam 3, the sliding block control groove is a curved groove, and the distance between the sliding block control groove and the central shaft 7 in the circumferential direction is changed. The middle hole of the unlocking cam 3 is a flat hole. There are two limit states in the rotation of the unlocking cam 3, namely a locked state and an unlocked state. In the locking state, the wedge-shaped block 6 is biased away from the elastic piece 5 by the elastic force of the elastic piece 5, the elastic piece 5 is in a relatively extended state in the compressed state, and the sliding block 4 is in an extended state; in the unlocking state, the wedge block 6 is driven by the wedge control groove to compress the elastic piece 5, and the sliding block 4 radially retracts. The transition between the two states is only required to rotate the unlocking cam 3.
Optionally, the unlocking mode provided by the application is not limited to the above situation, and any component capable of realizing control and conversion between the locked state and the unlocked state is within the scope of the application.
In addition to the angle adjusting device provided by the above embodiment, the application also provides an angle-adjustable seat disclosed by the above embodiment, which comprises a seat back, a seat basin and an angle adjusting device for adjusting the relative angle of the seat back and the seat basin, wherein a ratchet wheel 2 and a sliding groove plate 8 of the angle adjusting device are respectively connected with the seat back and the seat basin, and the ratchet wheel 2 is usually connected with the seat back and the sliding groove plate 8 so as to be connected with the seat basin, however, according to different use requirements, the ratchet wheel 2 can also be connected with the seat basin and the sliding groove plate 8 so as to be connected with the seat back. It should be noted that in the above-mentioned angle adjustment process, one of the angular positions should be fixed and the other should be rotated.
It should be noted that the above connection shall mean a rigid connection, i.e. the rotation of the ratchet wheel 2 can drive the angle of the chair back to change, and the chute plate 8 is rigidly and fixedly connected with the seat pan.
The seat is provided with the angle adjusting device, so that the angle adjusting precision of the seat back and the seat basin can be improved, the seat with various angles can be conveniently provided for a user, the stability of seat adjustment is ensured, and unstable factors in the adjustment process are avoided. The structure of the other parts of the seat is referred to in the prior art, and will not be described herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The above describes in detail an angle adjusting device and a seat having the same. The principles and embodiments of the present application have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present application and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.
Claims (4)
1. The angle adjusting device comprises a ratchet wheel with inner teeth on an inner ring, a sliding block with outer teeth, a collapsible mechanism and a chute plate which is coaxially arranged with the ratchet wheel and can rotate relatively, wherein the collapsible mechanism is used for controlling the sliding block to move radially along the chute plate so as to enable the outer teeth to be meshed with and separated from the inner teeth, and the collapsible mechanism can lock and unlock the sliding block; the ratchet is characterized in that the ratchet is provided with n internal teeth; the expanding and contracting mechanism can push each sliding block to extend out along the radial direction at the same time so as to enable all the external teeth to be abutted or clamped with the internal teeth and lock all the sliding blocks;
m sliding block groups consisting of the sliding blocks, wherein m=5 or 6 comprises a basic sliding block group and m-1 shifting sliding block groups, wherein the external teeth of the shifting sliding block groups have angle offset around the central axis of the ratchet wheel relative to the external teeth of the basic sliding block groups, the angle offset is (Z+k/m) 360/n degrees, Z, m, n and k are integers, and k is more than or equal to 1 and less than or equal to m-1, and each shifting sliding block group calculates the k value of the angle offset to be different, so that when all sliding blocks extend outwards, the external teeth of different sliding blocks are clamped with the internal teeth in different phases, and each sliding block has different meshing states with the ratchet wheel;
when m=5, the external teeth of the two slider groups adjacent in the circumferential direction have an adjacent angular offset amount about the central axis, the adjacent angular offset amount being (Z 1 +k/m) 360/n degrees, where Z 1 N is an integer, k=2; the external teeth of the two slider groups circumferentially spaced one slider have angular offset about the central axis, the angular offset being (Z 2 +1/m) 360/n degrees, where Z 2 N is the number of the internal teeth, and n is an integer; so that the sliding blocks with different meshing degrees tend to be uniformly distributed in the circumferential direction;
when m=6, the external teeth of two of the slider groups adjacent in the circumferential direction have an adjacent angular offset amount about the central axis, the adjacent angular offset amount being (Z 1 +k/m) 360/n degrees, where Z 1 N is an integer, k=2 or 3; the external teeth of the two slider groups circumferentially spaced one slider have angular offset about the central axis, the angular offset being (Z 2 +k/m) 360/n degrees, where Z 2 N is the number of the internal teeth, and k=1 or 2; so that the sliding blocks with different meshing degrees tend to be uniformly distributed in the circumferential direction;
the contact strength of the inner teeth and the outer teeth is greater than that of the radial sliding grooves of the sliding groove plates and the sliding blocks;
the external teeth of two circumferentially adjacent slide block groups are circumferentially separated by an angle ranging from 360/m-10 degrees to 360/m+10 degrees.
2. The angle adjusting device according to claim 1, wherein when the number of the slider groups m=5, the angle offset amounts of the external teeth of the basic slider group and the external teeth of the offset slider group in the clockwise direction are in order: (Z+2/5) 360/n degrees, (Z+4/5) 360/n degrees, (Z+1/5) 360/n degrees and (Z+3/5) 360/n degrees; wherein Z is an integer, n is the number of the internal teeth, and n is an integer.
3. The angle adjusting device according to claim 1, wherein when the number of the slider groups m=6, the angle offset amounts of the external teeth of the basic slider group and the external teeth of the offset slider group in the clockwise direction are in order: (Z+4/6) 360/n degrees, (Z+1/6) 360/n degrees, (Z+3/6) 360/n degrees, (Z+5/6) 360/n degrees and (Z+2/6) 360/n degrees;
or, (Z+3/6) 360/n degrees, (Z+5/6) 360/n degrees, (Z+1/6) 360/n degrees, (Z+4/6) 360/n degrees and (Z+2/6) 360/n degrees in this order;
or, (Z+4/6) 360/n degrees, (Z+2/6) 360/n degrees, (Z+5/6) 360/n degrees, (Z+1/6) 360/n degrees and (Z+3/6) 360/n degrees in this order;
or, (Z+3/6) 360/n degrees, (Z+1/6) 360/n degrees, (Z+5/6) 360/n degrees, (Z+2/6) 360/n degrees and (Z+4/6) 360/n degrees in this order;
or, (Z+2/6) 360/n degrees, (Z+4/6) 360/n degrees, (Z+1/6) 360/n degrees, (Z+5/6) 360/n degrees and (Z+3/6) 360/n degrees in this order;
or, (Z+2/6) 360/n degrees, (Z+5/6) 360/n degrees, (Z+3/6) 360/n degrees, (Z+1/6) 360/n degrees and (Z+4/6) 360/n degrees in this order;
wherein Z is an integer, n is the number of the internal teeth, and n is an integer.
4. A seat comprising a seat back, a seat pan and an angle adjustment device for adjusting the relative angle of the seat back and the seat pan, wherein the angle adjustment device is the angle adjustment device of any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610814159.6A CN106235724B (en) | 2016-09-09 | 2016-09-09 | Angle adjusting device and seat with same |
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| CN201610814159.6A CN106235724B (en) | 2016-09-09 | 2016-09-09 | Angle adjusting device and seat with same |
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| CN106235724A CN106235724A (en) | 2016-12-21 |
| CN106235724B true CN106235724B (en) | 2023-10-13 |
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| CN201610814159.6A Active CN106235724B (en) | 2016-09-09 | 2016-09-09 | Angle adjusting device and seat with same |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5685611A (en) * | 1995-07-31 | 1997-11-11 | Ikeda Bussan Co., Ltd. | Toothed rotary-CAM type reclining device |
| CN1679429A (en) * | 2004-04-07 | 2005-10-12 | 湖北中航精机科技股份有限公司 | Angle adjustment of plate spring seat and core device of back folder |
| CN101087931A (en) * | 2004-12-23 | 2007-12-12 | 谢夫勒两合公司 | Device for modifying the control times of an internal combustion engine |
| US7407230B1 (en) * | 2007-02-16 | 2008-08-05 | Hubei Aviation Precision Machinery Technology Co., Ltd. | Recliner regulating device |
| CN102144857A (en) * | 2011-02-24 | 2011-08-10 | 湖北中航精机科技股份有限公司 | Seat and backrest angle adjusting device thereof |
| CN102151022A (en) * | 2011-01-28 | 2011-08-17 | 湖北中航精机科技股份有限公司 | Seat angle adjusting device and seat |
| CN204109831U (en) * | 2014-11-11 | 2015-01-21 | 湖北中航精机科技有限公司 | A kind of seat and regulator for chair back angle thereof |
| CN206342194U (en) * | 2016-09-09 | 2017-07-21 | 湖北中航精机科技有限公司 | A kind of angle regulator and the seat with the angle regulator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102951043B (en) * | 2011-08-24 | 2015-05-20 | 湖北中航精机科技有限公司 | Seat angle adjusting device and seat with same |
| FR3025758B1 (en) * | 2014-09-12 | 2016-10-21 | Faurecia Sieges D'automobile | ANGLE ADJUSTING DEVICE NOT REDUCED FOR VEHICLE SEAT |
-
2016
- 2016-09-09 CN CN201610814159.6A patent/CN106235724B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5685611A (en) * | 1995-07-31 | 1997-11-11 | Ikeda Bussan Co., Ltd. | Toothed rotary-CAM type reclining device |
| CN1679429A (en) * | 2004-04-07 | 2005-10-12 | 湖北中航精机科技股份有限公司 | Angle adjustment of plate spring seat and core device of back folder |
| CN101087931A (en) * | 2004-12-23 | 2007-12-12 | 谢夫勒两合公司 | Device for modifying the control times of an internal combustion engine |
| US7407230B1 (en) * | 2007-02-16 | 2008-08-05 | Hubei Aviation Precision Machinery Technology Co., Ltd. | Recliner regulating device |
| CN102151022A (en) * | 2011-01-28 | 2011-08-17 | 湖北中航精机科技股份有限公司 | Seat angle adjusting device and seat |
| CN102144857A (en) * | 2011-02-24 | 2011-08-10 | 湖北中航精机科技股份有限公司 | Seat and backrest angle adjusting device thereof |
| CN204109831U (en) * | 2014-11-11 | 2015-01-21 | 湖北中航精机科技有限公司 | A kind of seat and regulator for chair back angle thereof |
| CN206342194U (en) * | 2016-09-09 | 2017-07-21 | 湖北中航精机科技有限公司 | A kind of angle regulator and the seat with the angle regulator |
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| CN106235724A (en) | 2016-12-21 |
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