WO2012055312A1 - 一种动力传递机构及包含该机构的处理盒 - Google Patents

一种动力传递机构及包含该机构的处理盒 Download PDF

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Publication number
WO2012055312A1
WO2012055312A1 PCT/CN2011/080235 CN2011080235W WO2012055312A1 WO 2012055312 A1 WO2012055312 A1 WO 2012055312A1 CN 2011080235 W CN2011080235 W CN 2011080235W WO 2012055312 A1 WO2012055312 A1 WO 2012055312A1
Authority
WO
WIPO (PCT)
Prior art keywords
power transmission
photosensitive drum
transmission mechanism
groove
driving head
Prior art date
Application number
PCT/CN2011/080235
Other languages
English (en)
French (fr)
Inventor
彭庆菲
梁军
Original Assignee
珠海赛纳打印科技股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN201010537983.4A external-priority patent/CN102466997B/zh
Application filed by 珠海赛纳打印科技股份有限公司 filed Critical 珠海赛纳打印科技股份有限公司
Priority to BR112013009100-2A priority Critical patent/BR112013009100B1/pt
Priority to EP11835585.8A priority patent/EP2634636A4/en
Priority to RU2013113999/11A priority patent/RU2575665C2/ru
Priority to US13/823,259 priority patent/US8737882B2/en
Priority to JP2013535255A priority patent/JP2013545134A/ja
Publication of WO2012055312A1 publication Critical patent/WO2012055312A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G03G21/1839—Means for handling the process cartridge in the apparatus body
    • G03G21/1857—Means for handling the process cartridge in the apparatus body for transmitting mechanical drive power to the process cartridge, drive mechanisms, gears, couplings, braking mechanisms
    • G03G21/186—Axial couplings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D2001/102—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via polygon shaped connections

Definitions

  • the present invention relates to an image forming apparatus such as a laser printer, a copying machine, etc., and more particularly to a power transmitting mechanism for an image forming apparatus and a process cartridge using the same. Background technique
  • a conventional image forming apparatus is provided with a motor, an image forming apparatus driving head and a process cartridge, the process cartridge is detachably mounted in the image forming apparatus, and the photosensitive drum is disposed on the process cartridge; the book is generated during operation of the image forming apparatus The power is transmitted to the process cartridge through the image forming device drive head to rotate the photosensitive drum on the process cartridge.
  • one end of the photosensitive drum 7 is fixedly provided with a power transmission mechanism including a drum shaft 17, and the drum shaft 17 is provided with a twist-shaped projection 17a, and the projection 17a includes a distal end portion 17al;
  • the center of rotation of the shaft 17 coincides with the center of rotation of the photosensitive drum 7;
  • the image forming apparatus drive head 18 includes a twisted groove 18a on which a bottom surface 18a2 is provided.
  • the image forming apparatus drive head 18 receives power rotation from the motor, the drum shaft 17 is engaged with the image forming apparatus drive head 18, and the rotational power is transmitted to the drum shaft 17 through the image forming apparatus drive head 18, and finally The photosensitive drum 7 is rotated.
  • the drum shaft 17 is engaged with the image forming apparatus driving head 18, the twisted projection 17a on the drum shaft 17 is inserted into the twisted groove 18a of the image forming apparatus driving head 18, and the end surface 17a1 and the bottom surface 18a2 are opposed to each other, and image formation is performed.
  • the rotational power on the device drive head 18 is transmitted to the drum shaft 17 by the engagement of the twisted projection 17a with the recess 18a.
  • FIG. 3 and 4 are respectively schematic views of the cross-sectional state when the twisted projection 17a and the twisted recess 18a are not rotated and rotated; as can be seen from the figure, the cross section of the twisted projection 17a and the twisted recess 18a are both triangular (e.g. The equilateral triangle), and the size of the triangular protrusion 17a is smaller than the size of the triangular groove 18a.
  • the drum shaft rotating shaft XI on the photosensitive drum does not coincide with the rotational axis X2 of the image forming apparatus driving head.
  • Fig. 3 when the projection 17a is inserted into the recess 18a but does not rotate with the recess 18a, the drum shaft rotating shaft XI on the photosensitive drum does not coincide with the rotational axis X2 of the image forming apparatus driving head.
  • Fig. 3 when the projection 17a is inserted into the recess 18a but does not rotate with the recess 18a, the drum shaft rotating shaft
  • the power is given to the protrusion 17a; at this time, the drum shaft rotation axis XI on the photosensitive drum coincides with the rotation axis X2 of the image forming apparatus driving head to ensure smooth transmission of the twisted protrusion 17a and the twisted groove 18a during operation;
  • R0 is the diameter of the rotating circle of the three apex angles 17a2 of the protrusions 17a
  • R1 is the inscribed circle diameter of the triangular groove 18a
  • R2 is the diameter of the three apex angles of the groove 18a, in order to realize the protrusion 17a and the image forming apparatus driving head
  • Power transmission of 18a, R0, Rl, R2 must meet the following Condition: R1 ⁇ R0 ⁇ R2.
  • Fig. 5 Another embodiment of the prior art is shown in Fig. 5.
  • the twisted projection 17a and the twisted recess 18a are both quadrangular (e.g., a regular quadrilateral), and the quadrilateral projection 17a is engaged with the quadrangular recess 18a and transmitted. power.
  • the image forming apparatus driving head can also adopt the manner shown in FIG. 6.
  • one end of the image forming apparatus driving head 28 is provided with a twisted groove 28a, and the groove 28a is provided with a bottom surface 28al and
  • the support protrusion 28a2 is located at the center of the twisted triangular groove 28a (the center of rotation of the support post protrusion 28a2 coincides with the rotation axis X2 of the image forming apparatus drive head), and its height is substantially the same as the depth of the groove 28a, the support The column can be tapered.
  • a photosensitive drum with a power transmission mechanism is generally used in a process cartridge used in a conventional image forming apparatus, and the processing cartridge includes at least: a photosensitive member having the power transmission mechanism for forming an electrostatic latent image A drum, a developer that develops the electrostatic latent image, and a developing roller that conveys the developer to the photosensitive drum.
  • the image forming apparatus drive head receives the rotational power from the motor from the image forming apparatus to rotate the photosensitive drum and the developing roller.
  • the distortion angle of the twisted surface on the protrusion and the groove is required to be high.
  • the twisted surface on the protrusion and the twisted surface on the groove are inconsistent due to manufacturing precision problems, the twisted surface on the protrusion forms a point-to-surface contact with the twisted surface on the groove, and one of the twisted surfaces is in the protrusion Deformation occurs during the meshing with the groove, so that the drum shaft rotation axis XI on the photosensitive drum does not coincide with the rotation axis X2 of the image forming apparatus driving head, which affects the smoothness of power transmission; in order to avoid the above problem, it is required
  • the twisted faces of the protrusions and the grooves are highly manufactured, which increases the manufacturing cost and causes problems such as manufacturing difficulties.
  • the polygonal shape of the protrusion and the groove is difficult to process, and the manufacturing precision of the protrusion and the groove is required to be high. Taking an equilateral triangle as an example, the precision of the equilateral triangle protrusion and the groove is required to ensure the accuracy of the center position of the triangle. Otherwise, the drum shaft rotation axis XI on the photosensitive drum is driven by the image forming apparatus when the protrusion is engaged with the groove. The rotation axis X2 of the head will not overlap, which will cause the transmission to be unstable. In addition, during the engagement of the protrusion and the groove, the apex angle of the triangle on the protrusion is easily transmitted due to the force due to the transmission of force.
  • the invention provides a power transmission mechanism to solve the technical problem that the existing power transmission mechanism affects the engagement of the engaging protrusion and the groove due to the wear of the force receiving mechanism during the engagement with the groove due to excessive pressure.
  • a power transmission mechanism includes a photosensitive drum driving head, and the photosensitive drum driving head cooperates with an image forming apparatus driving head to transmit a driving force
  • the image forming apparatus driving head includes: a triangular groove having a triangular cross section, which is disposed at the a power transmission portion in three apex angles of the triangular groove, the photosensitive drum drive head including a non-twisted protrusion projecting from the end surface of the drum shaft and engaging with a groove on the driving head of the image forming apparatus, the protrusion
  • the invention includes a limiting mechanism and a force receiving mechanism, wherein the force receiving mechanism is a convex tooth disposed obliquely on the non-twisted protrusion, and the protruding tooth is further provided with meshing transmission with the power transmission portion Powered engagement surface.
  • the limiting mechanism is located at a different position from the force receiving mechanism.
  • the limiting mechanism is a supporting disc on the protrusion that engages the edge of the groove.
  • the angle between the convex teeth and the rotation axis of the photosensitive drum driving head is 3-40°.
  • the angle between the inclined convex teeth and the rotation axis of the photosensitive drum driving head is 25-30°.
  • the protrusion is provided with a support disc having a length of 2 mm to 5 mm from the support disc of the non-twisted projection.
  • the length of the support tooth of the support disc of the non-twisted protrusion is 2. 3-3. 3 mm.
  • the minimum angle between the two convex teeth is 120°, and the upper limit tolerance of the manufacturing precision of the angle is 2-10°.
  • the manufacturing tolerance of the included angle is limited to an upper limit of 2-4°.
  • the male tooth further includes two mutually parallel planes connected to the support disc, the mating surface being at an angle to the two parallel planes.
  • the angle between the oblique side of the engaging surface and the axis of the photosensitive drum is 5-50°.
  • the angle between the oblique side of the engaging surface and the axis of the photosensitive drum is 10-40°.
  • the engaging surface includes two straight sides, and the angle between the straight side and the line connecting the center of the photosensitive drum driving head to the apex angle of the convex teeth is 0-90.
  • the angle between the straight edge and the line connecting the center of the photosensitive drum drive head to the top corner of the convex tooth is 25-45 °.
  • the area of the engaging surface is 5-20 mm 2 .
  • the area of the engaging surface is 7-16 mm 2 .
  • the limiting mechanism includes a support hole provided on the protrusion at a position of a central axis of the drum shaft and a support protrusion matched to the limit hole at a position of a central axis disposed in the groove.
  • the protrusion is provided with a support disc and two protrusions, and the protrusions are symmetrically distributed on both sides of the protrusion, wherein
  • the first protruding column is a convex tooth that meshes with the power transmission portion, the second protruding column is in contact with the inner wall of the groove, the force receiving mechanism is a first protruding column, and the limiting mechanism comprises a supporting disk and a first Two protruding columns.
  • a process cartridge comprising a photosensitive drum, further comprising the above-described power transmission mechanism, the power transmission mechanism being disposed at an end portion of the photosensitive drum.
  • the limiting mechanism and the force receiving mechanism are located at different positions.
  • the limiting mechanism does not affect the coincidence of the center of rotation when the force receiving mechanism is in the process of meshing with the groove due to excessive pressure, and solves the problem that the existing power transmitting mechanism is subjected to pressure during the meshing process with the groove due to the force receiving mechanism.
  • the protrusion of the same structure can be engaged with a plurality of grooves of different shapes to realize the transmission of power
  • the protrusion is easier to process and requires less manufacturing precision
  • the support point on the protrusion is separated from the force point.
  • the support point on the protrusion does not affect the coincidence of the rotation center XI, X2 when the force is applied to the groove due to excessive pressure during the engagement with the groove;
  • the protrusion and the groove may be arranged in a tapered shape so that the protrusion is more easily inserted into the groove;
  • the convex teeth on the protrusions are obliquely disposed on the supporting disc, which can prevent the photosensitive drum driving head from coming out of the image forming apparatus driving head during power transmission, and between the image forming apparatus driving head and the photosensitive drum driving head Stable transmission of power;
  • a plurality of inclined convex teeth may be disposed on the protrusion to reduce the force point between the protrusion and the groove;
  • the engagement surface is provided on the convex teeth to increase the force receiving area of the protrusions and the grooves, thereby reducing the wear generated between the protrusions and the grooves, and the power transmission between the photosensitive drum driving head and the driving head of the image forming apparatus is further improved. smooth.
  • FIG. 1 is a schematic perspective view of a photosensitive drum with a photosensitive drum driving head in the prior art
  • FIG. 2 is a schematic perspective view of a photosensitive drum driving head and an image forming apparatus driving head in the prior art
  • FIG. 3 is a schematic view showing a state of a cross section when the twisted protrusion and the twisted groove of the prior art are not rotated;
  • FIG. 4 is a schematic cross-sectional view showing a state in which a twisted protrusion and a twisted groove are rotated in the prior art
  • Figure 5 is another quadrilateral shape of the protrusion and the groove of the prior art
  • FIG. 6 is a schematic view showing a positioning post provided at a center position of a groove in the prior art
  • Figure 7 is a perspective view of the driving head of the image forming apparatus
  • Figure 8 is a plan view of the image forming apparatus driving head
  • FIGS. 10a and 10b are schematic cross-sectional views showing the non-twisted protrusions and the twisted grooves used in the first embodiment
  • Figure 11 is a schematic cross-sectional view showing the protrusion and the groove used in the second embodiment
  • 12a and 12b are schematic cross-sectional views showing a non-twisted protrusion and a twisted groove when the groove is a quadrilateral or a pentagon in the third embodiment;
  • FIG. 13a and 13b are schematic cross-sectional views showing a non-twisted protrusion with a support column used in the fourth embodiment when engaged with a twisted groove;
  • 14a and 14b are schematic cross-sectional views showing the protrusions and the grooves when the protrusions in the fifth embodiment and the sixth embodiment are quadrangular and pentagonal;
  • Figure 15 is a perspective view of the photosensitive drum with a positioning hole used in the seventh embodiment before the engagement of the groove with the positioning post;
  • 17a, 17b, and 17c are schematic cross-sectional views showing the three different shape protrusions with positioning holes and the grooves with positioning posts used in the seventh embodiment;
  • Figure 18 is a perspective view showing the photosensitive drum driving head used in the eighth embodiment.
  • Figure 19 is a perspective view showing the force analysis of the assembly of the photosensitive drum driving head and the image forming apparatus driving head used in the eighth embodiment;
  • Figure 20 is a perspective view of the photosensitive drum driving head used in Embodiment 9;
  • Figure 21 is a front elevational view of the photosensitive drum driving head used in the ninth embodiment.
  • Figure 22 is a plan view showing the assembly of the photosensitive drum driving head and the image forming apparatus driving head used in the ninth embodiment
  • Figure 23 is a schematic view showing the assembly of the photosensitive drum driving head and the image forming apparatus driving head used in the ninth embodiment
  • Figure 25 is a perspective view showing the photosensitive drum driving head used in the tenth embodiment
  • Figure 26 is a perspective view showing the photosensitive drum driving head used in the eleventh embodiment.
  • Figure 27 is a partial enlarged view of the non-twisted protrusion with the engaging surface used in the present invention.
  • Figure 28 is a front elevational view of Figure 26 taken along the line "B";
  • Figure 29 is a top plan view of a non-twisted projection with engagement faces employed in the present invention. detailed description
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • a power transmission mechanism includes a photosensitive drum driving head, and a photosensitive drum driving head is engaged with an image forming apparatus driving head and The image forming apparatus drives the head to receive power, and the image forming apparatus is provided with a groove on the driving head, and the photosensitive drum driving head comprises: a protrusion protruding axially from the end surface of the photosensitive drum; and a limiting mechanism for contacting the protrusion and the groove through mutual contact The limit is carried out, and the power is transmitted through the force receiving mechanism.
  • the image forming apparatus driving head 18 includes: a twisted groove 18a having a triangular cross section, and a power set at three apex angles of the triangle
  • the power transmission portion 18b is an inner slope that is located downstream of the rotational direction of the image forming apparatus in the triangular apex angle.
  • FIG 9 is a perspective view of the photosensitive drum driving head before the image forming apparatus driving head is engaged.
  • the photosensitive drum driving head comprises: a drum flange 26 disposed at the end of the photosensitive drum 7, from the end of the drum flange 26 To the drum shaft 27 and the non-twisted projection 27a which are rotatably supported for supporting the photosensitive drum 7 during the operation of the process cartridge, the non-twisted projection 27a is provided with a supporting disc 27a2 and a convex tooth 27al, in this embodiment
  • the support disc 27a2 and the convex teeth 27al serve as a limit mechanism and a force receiving mechanism of the power transmission mechanism, respectively.
  • the non-twisted projection 27a is engageable with the twisted recess 18a, and when the projection 27a on the projection 27a and the support disc 27a2 are inserted into the recess 18a, the projection 27a engages with the recess 18a and receives the rotation from the recess 18a.
  • Driving force therefore, when the motor on the image forming apparatus rotates, the motor transmits power to the image forming apparatus driving head 18, and the photosensitive drum driving head transmits power to the photosensitive by the engagement of the non-twisted projection 27a and the twisted groove 18a.
  • the drum drive head finally rotates the photosensitive drum 7.
  • the cross-sectional shape of the twisted groove 18a is a triangle (taking an equilateral triangle as an example).
  • Fig. 10a is a schematic cross-sectional view showing the non-twisted projection 27a in engagement with the twisted recess 18a. It can be seen from the figure that the support disc on the non-twisted projection 27a when the non-twisted projection 27a is engaged with the twisted recess 18a 27a2 is tangent to the three edges of the recess 18a to ensure accurate positioning of the center of the projection 27a and the recess 18a. At this time, the rotation axis XI of the non-twisted projection 27a coincides with the rotation axis X2 of the twisted recess 18a, which ensures The non-twisted projection 27a is smoothly engaged with the twisted groove 18a.
  • the protruding teeth 27a1 on the non-twisted projection 27a are engaged with the power transmission portion 18b to receive the rotational power during the engagement of the non-twisted projection 27a with the twisted recess 18a, so that the projection 27a rotates with the recess 18a.
  • the convex tooth 27al is easily deformed by the pressure of the groove 18a; the convex tooth 27a1 for transmitting the rotational power and the support disk 27a2 for accurately positioning the projection 27a are separated. It is arranged that the support disc 27a2 is prevented from being affected by the convex teeth 27al during the rotation of the non-twisted projection 27a, so that the positioning of the projection 27a is more accurate, and finally the non-twisted projection 27a is prevented from being engaged with the twisted recess 18a.
  • the work is not stable.
  • the convex tooth 27a1 and the support disc 27a2 on the projection 27a can be tapered; as shown in Fig. 10b, the projection top surface 27a3 (indicated by a broken line in the figure) is a drum shaft. 27 is the farthest plane from the center of the photosensitive drum (i.e., when the projection 27a is inserted into the recess 18a, the top surface 27a3 is most advanced in the recess 18a), and the projection engaging surface 27a4 (shown by the solid line in the figure) is on the projection 27a.
  • the size of the top surface 27a3 is smaller than the corresponding size on the engaging surface 27a4, so that when the non-twisted projection 27a is engaged with the twisted recess 18a, the top surface 27a3 is relatively easily inserted into the recess 18a; since the projection 27a is tapered, After the top surface 27a3 is inserted into the recess 18a, the other cross section of the projection 27a penetrates into the inside of the recess 18a until the engaging surface 27a4 is tangent to the recess 18a, at this time the rotational axis XI of the non-twisted projection 27a and the twisted recess The rotation axis X2 of 18a coincides.
  • the groove top surface 18al (indicated by a solid line in the drawing) does not coincide with the groove bottom surface 18a2 (indicated by a broken line in the drawing); to ensure that the non-twisted protrusion 27a is inserted
  • the depth of the twisted groove 18a is large, and the width of the convex tooth 27a1 on the protrusion 27a is set within a certain range; to make the non-twisted protrusion 27a penetrate into the inside of the twisted groove 18a, the width of the convex tooth 27al needs to be smaller than Or equal to the width of the overlapping area of the groove top surface 18a1 and the groove bottom surface 18a2, so that the convex teeth 27al can be easily inserted into the groove 18a and the meshing area with the groove 18a is maximized;
  • the width of the groove top surface 18al is small, so that the convex teeth 27al are more convenient when engaged with the groove top surface 18al, and the convex teeth
  • the support disc in this embodiment adopts a circular structure, and it is easily conceivable by a person skilled in the art that the disc of a circular structure is easier to process and more easily meets the manufacturing precision requirement; when the tool is rounded by using a machining tool such as a lathe After the disc is completed, the key groove is opened on a circular disc by using a tool such as a milling machine, and a common flat key or a semi-circular key or the like satisfying the size requirement is installed in the key groove, thereby completing the manufacturing of the protrusion in the embodiment.
  • Embodiment 2 Embodiment 2:
  • the groove 18a' is a regular quadrangular shape, and the support disk 27a2 is engaged with the four edges of the groove 18a' to ensure that the protrusion 27a coincides with the center of the groove 18a'; the convex tooth 27al is inside the groove 18a' Engages with an edge of the groove to transmit power from the groove 18a'.
  • the groove 18a" is a regular pentagon, and the support disk 27a2 is engaged with the five edges of the groove 18a"; the convex tooth 27al is engaged with an edge of the groove in the groove 18a", from The groove 18a" transmits power.
  • Embodiment 4 is a diagrammatic representation of the protrusions of the same structure. It can be seen that the protrusions of the same structure can be used in grooves of different shapes.
  • Embodiment 4 is a diagrammatic representation of the protrusions of the same structure.
  • the non-twisted projection 37a (shown by a solid line in the figure) is different in shape from the projection 27a (indicated by a broken line in the drawing) employed in the first embodiment as compared with the first embodiment.
  • a cross-sectional view of the non-twisted protrusion 37a when engaged with the twisted groove 18a is shown in Fig.
  • the non-twisted protrusion 37a includes two studs and a supporting disc 37a2, wherein the first stud is a convex tooth 37al,
  • the two protruding columns are the supporting columns 37a3; in this embodiment, the supporting discs 37a2 and the supporting columns 37a3 serve as the limiting mechanism of the power transmitting mechanism;
  • the non-twisted protrusions 37a are engaged with the twisted grooves 18a
  • the supporting discs 37a2 is engaged with the two edges on the twisted groove 18a, and the other edge of the twisted groove 18a is engaged with the support post 37a3
  • the support disc 37a2 and the support post 37a3 are on the edge with the twisted groove 18a
  • the sides it is ensured that the rotation axis XI of the non-twisted projection 27a coincides with the rotation axis X2 of the twisted groove 18a, so that the transmission between the non-twisted projection 37a and the twisted groove 18a is smooth.
  • the convex tooth 37al is engaged with any one of the power transmission portions 18b on the recess 18a to transmit the rotational power on the recess 18a to the projection 37a so that the projection 37a rotates with the recess 27a.
  • the support disc 37a2 is circular, its center is X3, the support post 37a3 and the convex tooth 37al are symmetrically arranged with respect to the center point X3, and the distance from the highest point on the support post 37a3 to the support disc 37a2 and the highest point on the convex tooth 37al to the support
  • the discs 37a2 are equidistant (i.e., equal in height), and the width of the support post 37a3 is equal to the width of the lug teeth 37a1.
  • the projections 37a can be tapered to better fit into the recess 18a during the operation of the projections 37a.
  • the twisted recess 18a includes a recess top surface 18a1 and a recess bottom surface 18a2 so that the non-twisted projection 37a can be inserted into the bottom surface 18a2 of the recess 18a so as to better engage the recess.
  • the width of the convex teeth 37a1, the support discs 37a2, and the support posts 37a3 on the projections 37a shall be set to be smaller than or equal to the width of the overlapping area of the groove top surface 18a1 and the groove bottom surface 18a2.
  • the contact area of the support post 37a3 with the upper edge of the recess 18a is larger, so that the projection 37a can be more tightly engaged with the recess 18a, and the transmission is more stable.
  • the process of forming the protrusions may be that the circular support discs 37a2 are first made by using a tool such as a lathe, and then two key grooves are symmetrically opened on the disc, and the flat keys are correspondingly mounted in the corresponding key grooves to form a support column and The convex teeth; in this way, the protrusions are made simpler and the accuracy is easier to meet the requirements.
  • the non-twisted protrusion has a quadrangular shape.
  • the non-twisted protrusion 47a has a quadrangular shape.
  • a regular quadrilateral is taken as an example.
  • the regular quadrilateral projection 47a has four vertices, two of which are engaged with the two edges of the twisted groove 18a, which are the supporting apex 47a2; the other apex 47al and the other edge of the groove 18a Engagement, the apex 47al is a force apex; the two support vertices 47a2 and the force apex 47al are respectively disposed on both sides of the rotation axis X2 of the twisted groove 18a. It will be readily apparent to those skilled in the art that any one of the four vertices on the regular quadrilateral projection 47a can serve as the force apex 47al, and any other two vertices opposite the apex can serve as the support apex 47a2.
  • Example 6 Example 6:
  • the non-twisted protrusion has a pentagonal shape, and as shown in FIG. 14b, the non-twisted protrusion 57a is a pentagon, which is positive in this embodiment.
  • the pentagon is taken as an example; the two pentagon protrusions 57a have two supporting vertices 57a2 engaged with the two edges on the groove 18a to support the positioning of the protrusion 57a; the other force apex 57al and the groove 18a The other edge engages, receives power from the recess 18a, and transmits power to the projection 57a.
  • the image forming apparatus drive head 28 is provided with a twisted groove 28a, and the center of the twisted groove 28a is provided with a support protrusion 28a2 which may be tapered.
  • One end of the photosensitive drum 7 is provided with a photosensitive drum driving head including a drum shaft 27 on which a non-twisted projection 27b is provided, and the non-twisted projection 27b includes a convex tooth 27b1, a disk 27b2 and a support hole. 27b3; The center of the support hole 27b3 coincides with the photosensitive drum rotation axis XI.
  • the support protrusion 28a2 and the support hole 27b3 serve as a stopper mechanism of the power transmission mechanism.
  • Fig. 17a is a schematic cross-sectional view showing the non-twisted projection 27b in engagement with the twisted recess 28a; when the non-twisted projection 27b is engaged with the twisted recess 28a, the support hole 27b3 is engaged with the support projection 28a2 and is a projection 27b provides support and positioning so that the rotation axis XI of the non-twisted projection 27b coincides with the rotation axis X2 of the twisted groove 28a during the engagement of the projection 27b with the groove 28a, ensuring the non-twisted projection 27b and the twisted groove
  • the engagement of 28a is smooth; as can be seen from Fig. 17a, when the non-twisted projection 27b is engaged with the twisted recess 28a, the disc 27b2 does not engage the edge of the recess 28a.
  • the convex tooth 27bb receives the rotational power from the groove 28a during the engagement with the edge of the groove to rotate the projection 27b.
  • the support circle 27b3 can be tapered to have substantially the same taper as the support protrusion 28a2.
  • the protrusions are tapered, the protrusions can be engaged with a plurality of differently shaped grooves, etc.), and the description thereof will not be repeated here.
  • 17b and 17c are respectively the second and third schemes of the embodiment, which are different from the above scheme in this embodiment.
  • the shape of the protrusions has changed.
  • the projection 37b is provided with a symmetrical post 37b4 provided with respect to the support circle 37b3 with the convex tooth 37b1, and the support hole 37b3 is engaged with the support projection 28a2 on the recess 28a to provide support and positioning for the projection 37b.
  • the protrusion 47b is a regular quadrangle, and one vertex of the regular quadrilateral projection 47b is a force receiving apex 47b1, and the protrusion is further provided with a support hole 47b3 which is engaged with the support protrusion 28a2 on the groove as a protrusion 47b.
  • Support and positioning are provided; of course, the protrusions may also be provided in other shapes such as a pentagon.
  • the image forming apparatus driving head used in the present embodiment is the same as the image forming apparatus driving head in the first embodiment, and the description thereof will not be repeated.
  • FIG 18 is a perspective view of the photosensitive drum driving head used in the eighth embodiment.
  • the photosensitive drum driving head comprises: a drum flange 2 disposed at the end of the photosensitive drum 1 and connected to the photosensitive drum 1, and the drum flange 2 is used.
  • a drum shaft 3 extending axially from the end of the drum flange 2, the drum shaft 3 is for rotatably supporting the photosensitive drum 1 during operation of the process cartridge, from the drum shaft 3 non-twisted protrusions 4 for axially extending, for receiving a driving force from the image forming apparatus driving head 18, the non-twisting protrusion 4 is provided with a supporting disc 4b, and the non-twisted protrusion 4 is supported on the disc 4b
  • a first protruding tooth 5a extending radially along the non-twisted projection 4 is provided, wherein the first protruding tooth 5a is obliquely disposed on the supporting disc 4b of the non-twisted projection 4.
  • the first protruding teeth 5a and the supporting discs 4b serve as a force receiving mechanism and a limiting mechanism of the power transmitting mechanism, respectively.
  • the first protruding teeth 5a located on the non-twisted protrusion 4 of the photosensitive drum driving head mesh with any power transmitting portion 18b to transmit power, and the non-twisted protrusion of the photosensitive drum driving head supports the disc 4b and the image.
  • the three edges forming the groove of the device driving head are tangentially engaged at the three tangent points P1, P2 and P3, thereby realizing the center coincidence between the photosensitive drum driving head and the image forming apparatus driving head 18 during the driving force transmission. in.
  • Figure 19 is a schematic view showing the force analysis of the driving of the photosensitive drum driving head and the image forming apparatus driving head
  • "A" is the rotation direction of the driving head of the image forming apparatus
  • the force generated by the driving head of the image forming apparatus on the first convex teeth 5a is Fl l F11 is decomposed into normal force F12 and radial force F14
  • F15 is the force generated by the image forming device driving head at the cutting point P1
  • F13 is the force generated by the image forming device driving head at the cutting point P2
  • P3 is not Force
  • the photosensitive drum driving head and the image forming apparatus drive head are in the process of transmitting the force, there is wear between them.
  • the photosensitive drum driving head is used as the convex tooth of the power transmission part and the non-twisted protrusion supporting the positioning function.
  • the discs are placed at different positions so that the force transfer function and the positioning function are not affected by each other due to wear.
  • FIG. 20 and FIG. 21 are respectively a perspective view and a front view of the photosensitive drum driving head used in the embodiment, and FIG. 22 is a top view of the driving drum driving head and the image forming apparatus driving head used in the embodiment.
  • the image forming apparatus driving head described in the embodiment employs the image forming apparatus driving head mentioned in the first embodiment, and the description thereof will not be repeated.
  • the photosensitive drum driving head comprises: a drum flange 2 fixedly connected to the end of the photosensitive drum 1, extending axially from the end of the drum flange 2, for rotatably supporting the photosensitive drum during the operation of the process cartridge
  • a drum shaft 3 of 1 is axially protruded from the end surface of the drum shaft 3, and a cylindrical non-twisted projection 4 for receiving a driving force from the image forming apparatus driving head 18 is provided on the supporting disc 4b of the non-twisted projection 4.
  • the convex teeth 4a are obliquely disposed on the support disc 4b of the non-twisted projection 4
  • the convex tooth 4a and the supporting disc respectively serve as the force receiving mechanism and the limiting mechanism of the power transmission mechanism;
  • the minimum angle ⁇ between the two protruding teeth 4a is 120°, and the upper limit of the angle is generally To be within 2°, the convex tooth 4a in this solution can allow the manufacturing precision error of the ⁇ size, the range of ⁇ is between 2° -10°, and the best is 2-4°.
  • the manufacturing error size of the angular size, ⁇ causes the convex tooth to produce a gradual mating surface, which acts as a buffer for the convex tooth 4a during the engagement of the convex tooth 4a with the power transmission portion 18b of the groove, which can reduce the image forming device drive Damage between the head and the drum driving head; the non-twisted protruding cylindrical surface between the two protruding teeth 4a contacts the edge of the image forming apparatus driving head to realize the positioning of the photosensitive drum driving head.
  • a rounded corner is also provided at the junction of the convex tooth 4a and the non-twisted convex cylindrical surface to reduce stress concentration.
  • the drum flange 3, the drum shaft 3, the cylindrical non-twisted protrusion 4 and the protruding tooth 4a in the above-mentioned photosensitive drum driving head may be integrally formed of the same material, or may have a buffer structure, and the drum flange 2 may also be A drum gear 2a that transmits a driving force to other components such as a developing member or the like is provided.
  • Figure 23 is a schematic view showing the assembly of the driving head of the photosensitive drum and the driving head of the image forming apparatus
  • Figure 24 is a schematic view showing the force analysis of the driving force of the driving head of the image forming apparatus after being engaged with the driving head of the photosensitive drum, as shown in the figure, the photosensitive drum driving head and the image forming apparatus
  • the edge of the groove of the driving head is tangentially engaged at three cutting points P4, P5 and P6, "A" is the rotating direction of the driving head of the image forming apparatus, and the driving head of the image forming apparatus generates the same force to the driving head of the photosensitive drum F24 and F56, in the drum drive
  • F24 and F56 are the same magnitude as the F11 in the eighth embodiment
  • F24 is decomposed into the normal force F2 and the radial force F4, and the F56 is decomposed into the normal direction.
  • the force F5 and the radial forces F6, F2 and F5 are the same size as the F12 in the eighth embodiment, and the F4 and F6 are the same size as the F14 in the eighth embodiment, assuming that F1 is the force generated by the image forming apparatus driving head at the point of cut P5. , F3 is the force generated by the image forming device driving head at the point of cut P6, P4
  • the wear of the image forming apparatus driving head and the photosensitive drum driving head at the cutting points P5 and P6 is reduced, and the positioning stability of the photosensitive drum driving head is improved, thereby making the transmission of the driving force smoother.
  • FIG. 25 is a photosensitive drum drive used in the embodiment.
  • a perspective view of the head, as shown, shows that the helical teeth 4a are obliquely disposed on the support disc 4b of the non-twisted projection, and the straight teeth 4c are vertically disposed on the support disc 4b.
  • the torque of the driving head of the image forming apparatus is small, and the two convex teeth of the photosensitive drum driving head may all be arranged as straight teeth, as shown in FIG. 26 for the photosensitive light used in the embodiment.
  • the three-dimensional schematic diagram of the drum driving head, 4d is the convex tooth of the photosensitive drum driving head, and the manufacturing precision of the photosensitive drum driving head is further reduced.
  • the convex teeth described in Embodiments 8 to 11 are exemplified in Embodiment 9, as shown in FIG. 21 and FIG. 22, as shown in the figure, the rotation of the convex tooth 4£1 and the photosensitive drum driving head
  • the angle ⁇ between the axes is selected to be between 3-40°, preferably 25-30°, to ensure that the drum drive head and the image forming device drive head can smoothly mesh while preventing the light from being transmitted during power transmission.
  • the drum driving head is disengaged from the image forming apparatus driving head to stably transmit power between the image forming apparatus driving head and the photosensitive drum driving head;
  • the length of the protruding teeth 4a in the radial direction from the supporting disc 4b is L1, the range of L1 It is between 2-5mm, and the best is 2. 3-3. 3mm, to ensure that the drum drive head has enough torque to transmit power.
  • the convex teeth in the above embodiment are exemplified in the ninth embodiment. As shown in FIG. 21, FIG. 22 and FIG. 27, it is known that the convex teeth 4a are provided with an engaging surface 4al, the engaging surface. 4al has an area of 5_20mm 2 , and 7_16mm 2 is the best.
  • the engaging surface 4al When the force is transmitted, the engaging surface 4al is meshed with the inner wall of the power transmission part in the driving head of the image forming apparatus to transmit power.
  • the engagement surface 4a1 of the convex tooth 4a can reduce the wear between the photosensitive drum driving head and the driving head of the image forming apparatus;
  • the convex tooth further comprises: an apex angle 4a2, two connected to the convex tooth supporting disk The mutually parallel planes 4a2 and 4a3, and the angle between the planes 4a2 and 4a3 and the drum axis is ⁇ ;
  • the mating surface further includes: straight sides sl, s2 and oblique sides s3; the straight side si and the straight side s2 Parallel, the angle ⁇ between the oblique side s3 and the axis of the photosensitive drum is between 5 and 50°, preferably between 10 and 40°, and the straight side si is connected to the center of the photosensitive drum drive head to the apex angle 4a2 of
  • the convex teeth can also be arranged in three symmetrical shapes, either of which are provided as inclined teeth or as vertical teeth. , or one of them is set as a slanted convex tooth, the other two are set as vertical convex teeth, or one of them is set as a vertical convex tooth, and the other two are arranged as inclined convex teeth; the same technical effect can also be achieved.
  • the inclined convex tooth means that the convex tooth is inclined and disposed on a supporting disc of the non-twisted protrusion, and the vertical convex tooth refers to a supporting disc which is perpendicularly disposed on the non-twisted protrusion. on.
  • non-twisted projection support disc and the non-twisted projection cylindrical surface are the same component.
  • a process cartridge comprising a photosensitive drum, further comprising a power transmission mechanism according to any one of the above embodiments, wherein the power transmission mechanism is disposed at an end of the photosensitive drum.

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Description

一种动力传递机构及包含该机构的处理盒 技术领域
本发明涉及一种图像形成装置， 如激光打印机、 复印机等， 尤其涉及用于图像形成装 置上的动力传递机构及采用该机构的处理盒。 背景技术
说
现有图像形成装置上设置有马达、 图像形成装置驱动头和处理盒， 处理盒可拆卸地安 装在图像形成装置中， 处理盒上设置有感光鼓；书在图像形成装置工作过程中， 马达产生动 力， 并通过图像形成装置驱动头将动力传递给处理盒， 使处理盒上的感光鼓旋转。
如图 1、 2所示， 感光鼓 7的一端固定地设置有动力传递机构， 该动力传递机构包括鼓 轴 17， 该鼓轴 17上设置有扭曲形突起 17a， 突起 17a包括末端部 17al ; 鼓轴 17的旋转中 心与感光鼓 7的旋转中心重合； 图像形成装置驱动头 18上包括扭曲形凹槽 18a， 凹槽 18a 上设置有底面 18a2。
在图像形成装置工作过程中， 图像形成装置驱动头 18接受来自马达的动力旋转， 鼓轴 17与图像形成装置驱动头 18啮合， 旋转动力通过图像形成装置驱动头 18传递给鼓轴 17， 并最终使感光鼓 7旋转。当鼓轴 17与图像形成装置驱动头 18啮合时， 鼓轴 17上的扭曲形 突起 17a***图像形成装置驱动头 18上的扭曲形凹槽 18a内， 末端面 17al与底面 18a2 正对，图像形成装置驱动头 18上的旋转动力通过扭曲突起 17a与凹槽 18a的啮合传递给鼓 轴 17。
如图 3、 4所示分别为扭曲形突起 17a与扭曲形凹槽 18a不旋转和旋转时的截面状态示 意图； 由图可知， 扭曲形突起 17a与扭曲形凹槽 18a的截面均为三角形 （如等边三角形）， 且三角形突起 17a的尺寸小于三角形凹槽 18a的尺寸。 如图 3所示， 当突起 17a***到凹 槽 18a内但不随凹槽 18a旋转时，感光鼓上的鼓轴旋转轴 XI与图像形成装置驱动头的旋转 轴 X2不重合。如图 4所示， 当突起 17a与凹槽 18a啮合并随凹槽 18a旋转时， 三角形突起 17a的三个顶角 17a2与凹槽 18a上三角形的三条棱边啮合， 并从凹槽 18a上传递动力给突 起 17a; 此时， 感光鼓上的鼓轴旋转轴 XI与图像形成装置驱动头的旋转轴 X2重合， 保证 扭曲形突起 17a与扭曲形凹槽 18a在工作过程中传动平稳； 图中， R0为突起 17a三个顶角 17a2的旋转圆直径， R1为三角形凹槽 18a的内切圆直径， R2为凹槽 18a的三个顶角旋转 圆直径， 为实现突起 17a与图像形成装置驱动头 18a的动力传递， R0、 Rl、 R2需满足以下 条件： R1〈R0〈R2。
如图 5所示为现有技术另一种实施例， 该实施例中扭曲形突起 17a和扭曲形凹槽 18a 均为四边形 （如正四边形）， 四边形突起 17a与四边形凹槽 18a啮合， 并传递动力。
现有技术中图像形成装置驱动头还可以采用如图 6所示方式； 如图 6所示， 图像形成 装置驱动头 28的一端设置有扭曲形凹槽 28a，凹槽 28a上设置有底面 28al和支撑突起 28a2， 支撑突起 28a2位于扭曲三角形凹槽 28a的中心 （支撑柱突起 28a2的旋转中心与图像形成 装置驱动头的旋转轴 X2重合）， 其高度与凹槽 28a的深度基本相同， 所述支撑柱可以是锥 形。
现有图像形成装置上使用的一种处理盒上普遍使用到上述带有动力传递机构的感光 鼓， 所述处理盒上至少包括： 用于形成静电潜像的、 带有上述动力传递机构的感光鼓， 将 所述静电潜象显影的显影剂和将所述显影剂传送给感光鼓的显影辊。 所述处理盒安装到图 像形成装置上使用时， 通过上述图像形成装置驱动头接收来自图像形成装置上来自马达的 旋转动力， 使所述感光鼓和显影辊旋转。
现有技术的这种动力传递结构存在以下缺点：
1.扭曲形突起与扭曲形凹槽啮合时， 突起和凹槽上扭曲面的扭曲角度精度要求较高。 当突起上的扭曲面与凹槽上的扭曲面因制造精度问题而产生扭曲角度不一致时， 突起上的 扭曲面与凹槽上的扭曲面就产生点对面接触， 其中之一的扭曲面在突起与凹槽的啮合过程 中就会发生变形， 从而造成感光鼓上的鼓轴旋转轴 XI与图像形成装置驱动头的旋转轴 X2 不重合， 影响动力传递的平稳性； 为避免上述问题， 就要求突起和凹槽的扭曲面制造精度 很高， 这样增加了生产制造成本， 同时带来生产制造困难等问题。
2.突起与凹槽的多边形形状难以加工， 对突起和凹槽的制造精度要求较高。 以等边三 角形为例， 等边三角形突起与凹槽的精度要求较高， 才能保证三角形中心位置的精度， 否 则在突起与凹槽啮合时感光鼓上的鼓轴旋转轴 XI与图像形成装置驱动头的旋转轴 X2就会 发生不重合现象， 从而造成传动不平稳； 另外， 在突起与凹槽的啮合过程中， 突起上三角 形的顶角因要传递动力， 因此容易因受力而发生变形， 长期工作易受到磨损或破坏； 而三 角形的三个顶角在工作过程中， 同时起到受力旋转和支撑定位作用， 因此磨损或破坏后的 三角形在与凹槽的啮合过程中，易产生中心 XI、 X2不重合的现象，从而影响传动的平稳性， 因此为保证传动的精度和平稳性， 对三角形突起的材料硬度和耐磨性要求较高； 同样的， 三角形凹槽的棱边上、 与突起的三个顶角接触的位置在工作过程中也易受到破坏或磨损， 对三角形凹槽的硬度和耐磨性同样要求较高。 发明内容 本发明提供一种动力传递机构， 以解决现有动力传递机构因受力机构在与凹槽啮合过 程中因压力过大受到磨损而影响啮合突起与凹槽啮合的技术问题。
为了解决上述问题， 本发明采取的技术方案是：
一种动力传递机构， 包括感光鼓驱动头， 所述感光鼓驱动头与图像形成装置驱动头配 合传递驱动力，所述图像形成装置驱动头包括： 具有三角形横截面的三角形凹槽， 设置在所 述三角形凹槽的三个顶角内的动力传输部， 所述感光鼓驱动头包括从鼓轴端面轴向伸出的 与图像形成装置驱动头上凹槽配合的非扭曲形突起， 所述突起包括限位机构和受力机构， 其特征是，所述受力机构为倾斜地设置在所述非扭曲形突起上的凸齿，所述凸齿上还设置有 与所述动力传输部啮合传递动力的啮合面。
所述限位机构与所述受力机构位于不同的位置处。
所述限位机构为所述突起上与所述凹槽棱边啮合的支撑圆盘。
所述凸齿有两个， 分别与所述凹槽的三个顶角的动力传输部中的两个动力传输部相匹 配。
所述凸齿与感光鼓驱动头的旋转轴线间的夹角为 3-40° 。
所述倾斜的凸齿与感光鼓驱动头的旋转轴线间的夹角为 25-30° 。
所述突起上设置有支撑圆盘， 所述凸齿从所述非扭曲形突起的支撑圆盘沿径向方向上 的长度为 2_5mm。
所述凸齿从所述非扭曲形突起的支撑圆盘沿径向方向上的长度为 2. 3-3. 3mm。
所述两个凸齿间最小夹角为 120° ， 所述夹角的制造精度上限公差为 2-10° 。
所述夹角的制造精度上限公差为 2-4° 。
所述凸齿还包括两个与所述支撑圆盘相连的两个互相平行的平面， 所述啮合面与所述 两个平行平面成一个夹角。
所述啮合面的斜边与感光鼓轴线间的夹角为 5-50° 。
所述啮合面的斜边与感光鼓轴线间的夹角为 10-40° 。
所述啮合面包括两条直边， 所述直边与所述感光鼓驱动头中心到所述凸齿的顶角的连 线间的夹角为 0-90° 。
所述直边与所述感光鼓驱动头中心到所述凸齿的顶角的连线间的夹角为 25-45 ° 。 所述啮合面的面积为 5_20mm2。
所述啮合面的面积为 7_16mm2。
所述限位机构包括设置于突起上位于鼓轴的中轴线位置处的支撑孔和设置于凹槽内的 中轴线位置处与所述限位孔相匹配的支撑突起。
所述突起上设置有支撑圆盘和两个突柱， 所述突柱对称分布在所述突起的两侧， 其中 第一突柱为与所述动力传输部啮合的凸齿， 第二突柱与所述凹槽内壁接触， 所述受力机构 为第一突柱， 所述限位机构包括支撑圆盘和第二突柱。
一种处理盒， 包括感光鼓， 还包括上述动力传递机构， 所述动力传递机构设置在感光 鼓端部。
在采用了上述技术方案后， 由于限位机构与所述受力机构位于不同的位置处。 限位机 构不会因为受力机构在与凹槽啮合过程中因压力过大而影响啮合时旋转中心的重合， 解决 了现有动力传递机构因受力机构在与凹槽啮合过程中因压力过大受到磨损而影响啮合突起 与凹槽啮合的技术问题。且由于凸齿有两个，分别与三个顶角的动力传输部中的两个动力传 输部相匹配， 减小了图像形成装置驱动头与感光鼓驱动头在各定位点处的作用力， 进而减 少图像形成装置驱动头和感光鼓驱动头产生磨损， 解决了因磨损而导致图像形成装置驱动 头和感光鼓驱动头轴中心不重合影响定位的技术问题。
上述技术方案还具有以下优点：
1. 同一种结构的突起可与多种不同形状的凹槽啮合， 实现动力的传递；
2. 设置成上述形状后， 突起更易于加工， 对制造精度要求更低；
3. 突起上的支撑点和受力点分开，突起上的支撑点不会因为突起上的受力点在与凹槽 啮合过程中因压力过大而影响啮合时旋转中心 XI、 X2的重合；
4. 突起与凹槽可设置成锥形， 使得突起更易***到凹槽中；
5. 将上述突起上的凸齿倾斜地设置在支撑圆盘上，能够防止在动力传递过程中感光鼓 驱动头从图像形成装置驱动头中脱出，使图像形成装置驱动头与感光鼓驱动头间稳 定的传递动力；
6. 突起上还可以设置多个倾斜凸齿， 减少突起与凹槽之间的受力点；
7. 在上述凸齿上设置啮合面，增大了突起与凹槽的受力面积，从而降低突起与凹槽间 产生的磨损， 使感光鼓驱动头与图像形成装置驱动头间的动力传递更平稳。 附图说明
图 1为现有技术中带有感光鼓驱动头的感光鼓立体示意图；
图 2为现有技术中感光鼓驱动头与图像形成装置驱动头的立体示意图；
图 3为现有技术扭曲形突起与扭曲形凹槽不旋转时的截面状态示意图；
图 4为现有技术扭曲形突起与扭曲形凹槽旋转时的截面状态示意图；
图 5为现有技术另一种突起与凹槽的形状为四边形；
图 6为现有技术中凹槽的中心位置设置有定位柱的示意图；
图 7为图像形成装置驱动头的立体示意图； 图 8为图像形成装置驱动头的俯视图；
图 9为实施例一所采用的感光鼓驱动头与图像形成装置驱动头啮合前的立体示意图； 图 10a、 10b为实施例一所采用的非扭曲形突起与扭曲形凹槽啮合时的截面示意图； 图 11为实施例二所采用的突起与凹槽啮合时的截面示意图；
图 12a、 12b分别为实施例三中凹槽为四边形、 五边形时， 非扭曲形突起与扭曲形凹 槽啮合时的截面示意图；
图 13a、 13b为实施例四所采用的带有支撑柱的非扭曲形突起与扭曲形凹槽啮合时的 截面示意图；
图 14a、 14b分别为实施例五和实施例六中所采用的突起为四边形、 五边形时， 突起 与凹槽啮合时的截面示意图；
图 15为实施例七所采用的带有定位柱的凹槽与感光鼓驱动头啮合前的立体示意图； 图 16为实施例七所采用的带有定位孔的感光鼓立体示意图；
图 17a、 17b、 17c分别为实施例七所采用的带有定位孔的三种不同形状突起与带有定 位柱的凹槽啮合时的截面示意图；
图 18为实施例八所采用的感光鼓驱动头的立体示意图；
图 19为实施例八所采用的感光鼓驱动头与图像形成装置驱动头装配的受力分析示意 图；
图 20为实施例九所采用的感光鼓驱动头的立体图；
图 21为实施例九所采用的感光鼓驱动头的正视图；
图 22为实施例九所采用的感光鼓驱动头与图像形成装置驱动头装配俯视图； 图 23为实施例九所采用的感光鼓驱动头与图像形成装置驱动头装配示意图； 图 24 为实施例九所采用的图像形成装置驱动头与感光鼓驱动头啮合后的截面受力分 析示意图；
图 25为实施例十所采用的感光鼓驱动头的立体示意图；
图 26为实施例十一所采用的感光鼓驱动头的立体示意图；
图 27为本发明所采用的带有啮合面的非扭曲形突起的局部放大图；
图 28为图 26沿 "B"方向的正视图；
图 29为本发明所采用的带有啮合面的非扭曲形突起的俯视图。 具体实施方式
实施例一：
一种动力传递机构，包括感光鼓驱动头，感光鼓驱动头与图像形成装置驱动头啮合并从 图像形成装置驱动头上接收动力， 图像形成装置驱动头上设置有凹槽，感光鼓驱动头包括： 感光鼓轴端面轴向伸出的突起； 突起与凹槽之间通过相互接触的限位机构进行限位， 通过 受力机构进行传递动力。
图 7和图 8分别为图像形成装置驱动头的立体示意图和俯视图， 由图知， 图像形成装 置驱动头 18包括： 具有三角形横截面的扭曲凹槽 18a， 设置在三角形的三个顶角的动力传 输部 18b， 动力传输部 18b为三角形顶角内位于图像形成装置驱动头旋转方向下游的内斜 面。
图 9为感光鼓驱动头与图像形成装置驱动头啮合前的立体示意图， 由图知， 感光鼓驱 动头包括： 设置在感光鼓 7端部的鼓凸缘 26， 从鼓凸缘 26端部轴向伸出、 用于在处理盒 工作过程中可旋转地支撑感光鼓 7的鼓轴 27和非扭曲形突起 27a， 非扭曲突起 27a上设置 有支撑圆盘 27a2和凸齿 27al，本实施例中，支撑圆盘 27a2和凸齿 27al分别作为所述动力 传递机构的限位机构和受力机构。非扭曲形突起 27a可与扭曲形凹槽 18a啮合， 当突起 27a 上的凸齿 27al和支撑圆盘 27a2***凹槽 18a内时， 突起 27a与凹槽 18a啮合并接收来自 凹槽 18a上的旋转驱动力； 因此， 当图像形成装置上的马达转动时， 马达将动力传输给图 像形成装置驱动头 18， 感光鼓驱动头通过非扭曲形突起 27a与扭曲形凹槽 18a的啮合将动 力传递给感光鼓驱动头， 最终使感光鼓 7旋转。 扭曲形凹槽 18a的截面形状为三角形 （以 等边三角形为例）。
图 10a所示为非扭曲形突起 27a与扭曲形凹槽 18a啮合时的截面示意图， 由图可知， 在非扭曲形突起 27a与扭曲形凹槽 18a啮合时， 非扭曲突起 27a上的支撑圆盘 27a2与凹槽 18a的三条棱边相切， 以保证突起 27a与凹槽 18a的中心定位准确， 此时非扭曲形突起 27a 的旋转轴 XI与扭曲形凹槽 18a的旋转轴 X2重合， 保证了非扭曲形突起 27a与扭曲形凹槽 18a啮合平稳。
非扭曲形突起 27a上的凸齿 27al，在非扭曲形突起 27a与扭曲形凹槽 18a啮合过程中， 与动力传输部 18b啮合接收旋转动力， 使突起 27a随凹槽 18a旋转。
在凸齿 27al与动力传输部 18b啮合过程中， 凸齿 27al易受到凹槽 18a的压力而变形； 将用于传递旋转动力的凸齿 27al和用于使突起 27a定位准确的支撑圆盘 27a2分开设置， 可避免支撑圆盘 27a2在非扭曲形突起 27a旋转过程中受到凸齿 27al的影响， 使突起 27a 的定位更准确，而最终避免非扭曲形突起 27a在与扭曲形凹槽 18a啮合过程中工作不平稳。
为使突起 27a更容易***到凹槽 18a中，突起 27a上的凸齿 27al和支撑圆盘 27a2可制 作成锥形； 如图 10b所示， 突起顶面 27a3 (图中虚线表示） 为鼓轴 27上距离感光鼓中心 最远处的平面 （即在突起 27a***凹槽 18a内时， 顶面 27a3最先进去凹槽 18a中）， 突起 啮合面 27a4 (图中实线表示）为突起 27a上与凹槽 18a三条棱边相切处的截面； 由图可知， 顶面 27a3的尺寸小于啮合面 27a4上相应的尺寸， 因此在非扭曲形突起 27a与扭曲形凹槽 18a啮合时， 顶面 27a3较容易***到凹槽 18a中； 由于突起 27a为锥形， 因此在顶面 27a3 ***凹槽 18a中后，突起 27a的其它截面深入到凹槽 18a内部，直至啮合面 27a4与凹槽 18a 相切， 此时非扭曲形突起 27a的旋转轴 XI与扭曲形凹槽 18a的旋转轴 X2重合。
如图 10b所示， 由于凹槽 18a为扭曲形状， 因此凹槽顶面 18al (图中实线表示） 与凹 槽底面 18a2 (图中虚线表示） 不重合； 为保证非扭曲形突起 27a***到扭曲形凹槽 18a的 深度较大， 突起 27a上的凸齿 27al的宽度需设定在一定范围内； 要使非扭曲形突起 27a深 入到扭曲形凹槽 18a内部， 凸齿 27al的宽度需小于或等于凹槽顶面 18al与凹槽底面 18a2 的重合区域的宽度， 这样凸齿 27al可较容易地***到凹槽 18a中， 并与凹槽 18a啮合面积 达到最大； 由于凸齿 27al的宽度比凹槽顶面 18al的宽度小， 因此凸齿 27al在与凹槽顶面 18al啮合时更方便， 凸齿 27al能更容易的***到凹槽 18a中。
本实施例中的所述支撑圆盘采用圆形结构， 普通技术人员很容易能想到， 圆形结构的 圆盘更易于加工， 且更容易满足制造精度要求； 当利用车床等加工工具将圆形的圆盘制作 完成后， 在圆形的圆盘上利用铣床等工具开设键槽， 将满足尺寸要求的普通平键或者半圆 键等安装到所述键槽中， 即可完成本实施例中突起的制造。 实施例二：
如图 11所示， 为加大凸齿 27al'与凹槽 18a的接触面积， 减少凸齿 27al'上因局部压力 过大而产生变形， 凸齿 27al'上与凹槽 18a棱边的接触部分设置为斜面，且该斜面的斜度与 凹槽棱边的斜度基本相同。 实施例三：
如图 12a所示， 凹槽 18a'为正四边形， 支撑圆盘 27a2与凹槽 18a'的四条棱边啮合， 保 证突起 27a与凹槽 18a'的中心重合； 凸齿 27al在凹槽 18a'内与凹槽的一条棱边啮合， 从凹 槽 18a'上传递动力。
如图 12b所示， 凹槽 18a"为正五边形， 支撑圆盘 27a2与凹槽 18a"的五条棱边啮合； 凸齿 27al在凹槽 18a"内与凹槽的一条棱边啮合， 从凹槽 18a"上传递动力。
由此可以看出， 同一种结构的突起可用于不同形状的凹槽中。 实施例四：
如图 13a、 13b所示， 与实施例一相比， 非扭曲形突起 37a (图中实线表示） 相对于实 施例一中采用的突起 27a (图中虚线表示）， 在形状上有所变化。 如图 13a所示为非扭曲形突起 37a与扭曲形凹槽 18a啮合时的截面示意图； 非扭曲形 突起 37a包括两个突柱和支撑圆盘 37a2， 其中第一突柱为凸齿 37al， 第二突柱为支撑柱 37a3 ; 本实施例中， 支撑圆盘 37a2和支撑柱 37a3作为所述动力传递机构的限位机构； 当 非扭曲形突起 37a与扭曲形凹槽 18a啮合时， 支撑圆盘 37a2与扭曲形凹槽 18a上的两条棱 边啮合，扭曲形凹槽 18a上的另一条棱边与支撑柱 37a3啮合；支撑圆盘 37a2和支撑柱 37a3 在与扭曲形凹槽 18a上的棱边啮合时， 保证非扭曲形突起 27a的旋转轴 XI与扭曲形凹槽 18a的旋转轴 X2重合， 使非扭曲形突起 37a与扭曲形凹槽 18a之间的传动平稳。
凸齿 37al与凹槽 18a上的任意一个动力传输部 18b啮合，将凹槽 18a上的旋转动力传 递给突起 37a， 使得突起 37a随凹槽 27a旋转。
支撑圆盘 37a2为圆形， 其圆心为 X3， 支撑柱 37a3与凸齿 37al相对中心点 X3对称设 置，且支撑柱 37a3上最高点到支撑圆盘 37a2的距离与凸齿 37al上最高点到支撑圆盘 37a2 的距离相等 （即高度相等）、 支撑柱 37a3的宽度与凸齿 37al的宽度相等。
与实施例一相似的， 突起 37a可制作成锥形的， 以便在突起 37a的工作过程中能更好 地***凹槽 18a中。
如图 13b所示，扭曲形凹槽 18a包括凹槽顶面 18al和凹槽底面 18a2，为使非扭曲形突 起 37a能***到凹槽 18a的底面 18a2，以便能更好地与凹槽啮合，突起 37a上的凸齿 37al、 支撑圆盘 37a2、 支撑柱 37a3的宽度须设置成小于或等于凹槽顶面 18al与凹槽底面 18a2 的重合区域的宽度。
与实施例一相比，支撑柱 37a3与凹槽 18a上棱边的接触面积更大，这样可以使突起 37a 与凹槽 18a啮合时更加紧密， 传动更平稳。
突起的制作过程可以是， 先将圆形的支撑圆盘 37a2利用车床等工具制作出来， 然后在 圆盘上对称地开设两个键槽，将平键对应地安装到相应键槽中以形成支撑柱与凸齿； 这样， 突起的制作就变得简单， 精度更容易满足要求。
其它与实施例一相同的结构特征或技术效果 （例如将突起制作成锥形、 突起可与多种 不同形状的凹槽啮合等）， 在此不再重复描述。 实施例五：
如图 14a所示为本发明第五种实施例； 本实施例中， 非扭曲形突起采用四边形形状， 如图 14a所示， 非扭曲形突起 47a为四边形， 本实施例中以正四边形为例； 正四边形突起 47a上有四个顶点， 其中两个顶点与扭曲形凹槽 18a的两条棱边啮合， 这两个顶点为支撑 顶点 47a2; 另一个顶点 47al与凹槽 18a的另一条棱边啮合， 该顶点 47al为受力顶点； 两 个支撑顶点 47a2与受力顶点 47al分别设置在扭曲形凹槽 18a旋转轴 X2的两侧。 普通技术人员很容易就能想到， 正四边形突起 47a上的四个顶点中任意一个可以作为 受力顶点 47al， 另外的任意两个与该顶点相对的顶点可以作为支撑顶点 47a2。 实施例六：
如图 14b所示为本发明第六种实施例； 本实施例中， 非扭曲形突起采用五边形形状， 如图 14b所示， 非扭曲形突起 57a为五边形， 本实施例以正五边形为例； 正五边形突起 57a 上有两个支撑顶点 57a2与凹槽 18a上的两条棱边啮合， 为突起 57a起到支撑定位作用； 另 一个受力顶点 57al与凹槽 18a的另一条棱边啮合， 接收来自凹槽 18a的动力， 并将动力传 递给突起 57a。
本领域普通技术人员很容易就能想到，五边形的任意两个顶点可以作为支撑顶点 57a2， 另一个顶点可以作为受力顶点 57al。 实施例七：
如图 15、 16所示， 图像形成装置驱动头 28上设置有扭曲形凹槽 28a， 扭曲形凹槽 28a 的中心位置设置有支撑突起 28a2， 支撑突起 28a2可以是锥形。
感光鼓 7的一端设置有感光鼓驱动头， 该感光鼓驱动头包括鼓轴 27， 鼓轴 27上设置 有非扭曲形突起 27b， 非扭曲形突起 27b包括凸齿 27bl、 圆盘 27b2和支撑孔 27b3; 支撑 孔 27b3的中心与感光鼓旋转轴 XI重合。
本实施例中， 支撑突起 28a2和支撑孔 27b3作为所述动力传递机构的限位机构。
如图 17a所示为非扭曲形突起 27b与扭曲形凹槽 28a啮合时的截面示意图； 当非扭曲 形突起 27b与扭曲形凹槽 28a啮合时， 支撑孔 27b3与支撑突起 28a2啮合， 并为突起 27b 提供支撑和定位， 使突起 27b在与凹槽 28a啮合过程中， 非扭曲形突起 27b的旋转轴 XI与 扭曲形凹槽 28a的旋转轴 X2重合， 保证非扭曲形突起 27b与扭曲形凹槽 28a啮合平稳； 由 图 17a可知， 在非扭曲形突起 27b与扭曲形凹槽 28a啮合时， 圆盘 27b2不与凹槽 28a的棱 边啮合。
凸齿 27bl在与凹槽的棱边啮合过程中， 接收来自凹槽 28a的旋转动力， 使突起 27b旋 转。
为使支撑圆 27b3能更方便地***到支撑突起 28a2上， 支撑圆 27b3可制作成锥形， 其 锥度与支撑突起 28a2的锥度基本相同。
其它与实施例一相同的结构特征或技术效果 （例如将突起制作成锥形、 突起可与多种 不同形状的凹槽啮合等）， 在此不再重复描述。
如图 17b、 17c所示分别为本实施例第二、 三种方案， 与本实施例上述方案不同的是， 突起的形状有所变化。
如图 17b所示，突起 37b上设置有与凸齿 37bl相对于支撑圆 37b3设置的对称柱 37b4， 支撑孔 37b3与凹槽 28a上的支撑突起 28a2啮合， 为突起 37b提供支撑和定位。
如图 17c所示， 突起 47b为正四边形， 正四边形突起 47b的一个顶点为受力顶点 47bl， 突起上还设置有支撑孔 47b3， 支撑孔 47b3与凹槽上的支撑突起 28a2啮合， 为突起 47b提 供支撑和定位； 当然， 突起还可以设置成五边形等其它形状。 实施例八
本实施例中所采用的图像形成装置驱动头与实施例一中的图像形成装置驱动头是相 同的， 不再重复描述。
图 18为实施例八所采用的感光鼓驱动头的立体示意图，由图知，感光鼓驱动头包括： 设置在感光鼓 1端部与感光鼓 1连接的鼓凸缘 2， 鼓凸缘 2用于将接收的驱动力传递给 感光鼓 1，从鼓凸缘 2端部轴向伸出的鼓轴 3， 鼓轴 3用于在处理盒工作过程中可旋转地 支撑感光鼓 1， 从鼓轴 3端面轴向伸出、 用于从图像形成装置驱动头 18上接收驱动力的 非扭曲形突起 4， 非扭曲突起 4上设置有支撑圆盘 4b， 非扭曲形突起 4的支撑圆盘 4b 上设置有沿非扭曲形突起 4径向延伸的第一凸齿 5a， 其中第一凸齿 5a倾斜地设置在非 扭曲形突起 4的支撑圆盘 4b上。
本实施例中， 第一凸齿 5a和支撑圆盘 4b分别作为所述动力传递机构的受力机构和 限位机构。
在驱动力传递过程中，位于感光鼓驱动头非扭曲形突起 4上的第一凸齿 5a与任一动 力传输部 18b啮合传递动力，感光鼓驱动头的非扭曲形突起支撑圆盘 4b与图像形成装置 驱动头凹槽的三条棱边在三个切点 Pl， P2和 P3处相切啮合， 从而实现在驱动力传递过 程中感光鼓驱动头与图像形成装置驱动头 18之间的中心重合对中。
图 19为感光鼓驱动头与图像形成装置驱动头装配的受力分析示意图， "A"为图像形 成装置驱动头的旋转方向， 图像形成装置驱动头对第一凸齿 5a产生的力为 Fl l， F11分 解为法向力 F12和径向力 F14， F15为图像形成装置驱动头在切点 P1处产生的力， F13 为图像形成装置驱动头在切点 P2处产生的力， P3处不受力， 综上可得如下受力分析式:
Figure imgf000012_0001
得到 F13=2 · F14, F15 = ^~F12 , 即图像形成装置驱动头或感光鼓驱动头在 P1处受到 ^F12大小的力， 在 P2处受到 2 * F14大小的力。
3
因为感光鼓驱动头与图像形成装置驱动头啮合传递力的过程中，相互之间存在磨损， 本方案中将感光鼓驱动头作为动力传输部的凸齿与起到定位作用的非扭曲形突起支撑圆 盘设置在不同位置处， 使力传递功能与定位功能不会因为磨损而彼此受到影响。 实施例九
如图 20和图 21所示， 分别为本实施例所采用的感光鼓驱动头的立体图和正视图， 图 22为本实施例所采用的感光鼓驱动头与图像形成装置驱动头装配俯视图， 本实施例中所描 述的图像形成装置驱动头采用实施例一中提到的图像形成装置驱动头， 不再重复描述。 由 图知， 感光鼓驱动头包括： 固定连接在感光鼓 1端部的鼓凸缘 2， 从鼓凸缘 2端部轴向延 伸出、 用于在处理盒工作过程中可旋转地支撑感光鼓 1的鼓轴 3， 从鼓轴 3端面轴向伸出、 用于从图像形成装置驱动头 18上接收驱动力的圆柱形非扭曲形突起 4， 非扭曲形突起 4的 支撑圆盘 4b上设置有沿非扭曲形突起 4径向延伸、并与图像形成装置驱动头中任意两个动 力传输部配合的一对凸齿 4a; 凸齿 4a倾斜地设置在非扭曲形突起 4支撑圆盘 4b上； 本实 施例中， 凸齿 4a和支撑圆盘分别作为所述动力传递机构的受力机构和限位机构； 两个凸 齿 4a间的最小夹角 α标准角度为 120° ， 角度上限公差一般要在 2° 以内， 本方案中凸齿 4a可允许有 Θ大小的制造精度误差， Θ的范围为 2° -10° 之间， 以 2-4° 最佳， 若 Θ为角 度误差，则两个凸齿 4a间的最小夹角 α大小变为 α + Θ，此时两个凸齿 4a不会同时与凹槽 18a的动力传输部 18b啮合， 位于旋转方向最上游的凸齿先与图像形成装置驱动头上的动 力传输部啮合， 起到缓冲作用， 若凸齿 4a沿旋转方向下游有 Θ角大小的制造误差尺寸， Θ 会使凸齿产生一个渐变的啮合面， 在凸齿 4a与凹槽的动力传输部 18b啮合过程中为凸齿 4a起到缓冲作用， 可以减小图像形成装置驱动头与感光鼓驱动头间的损坏； 位于两个凸齿 4a间的非扭曲形突起圆柱面与图像形成装置驱动头的棱边接触实现感光鼓驱动头的定位。 在凸齿 4a与非扭曲形突起圆柱面连接处还设置圆角以减小应力集中。且上述感光鼓驱动头 中的鼓凸缘 3、 鼓轴 3、 圆柱形非扭曲形突起 4和凸齿 4a可以为同种材料一体制作成型， 也可以具有缓冲结构，鼓凸缘 2上还可以设置有将驱动力传递给其他元件（如显影元件等) 的鼓齿轮 2a。
图 23为感光鼓驱动头与图像形成装置驱动头装配示意图， 图 24为图像形成装置驱动 头与感光鼓驱动头啮合后的截面受力分析示意图， 由图知， 感光鼓驱动头与图像形成装置 驱动头凹槽的棱边在三个切点 P4、 P5和 P6处相切啮合， "A"为图像形成装置驱动头的旋 转方向， 图像形成装置驱动头对感光鼓驱动头产生大小相同的力 F24和 F56， 在感光鼓驱 动头承受的扭矩为实施例八扭矩两倍的情况下， F24和 F56与实施例八中的 F11是大小相 同的力， F24分解为法向力 F2和径向力 F4, F56分解为法向力 F5和径向力 F6, F2和 F5与 实施例八中的 F12大小相同， F4和 F6与实施例八中的 F14大小相同， 假设 F1为图像形 成装置驱动头在切点 P5处产生的力， F3为图像形成装置驱动头在切点 P6处产生的力， P4
F\ + F6 - sin 30° = + · sin 60° + F3 · sin 30° 不受力， 综上可得如下受力分析式: F2 + F3 - sin 60。 = F6 · sin 60。 + F5 · sin 30° 得到
Figure imgf000014_0001
Fl=2 · F4和 F3=0， 即图像形成装置驱动头和感光鼓驱动头在 P5处受到 2 · F4大小的力， 在 P6处受力为 0， 相对于实施例八本方案受力点减少， 降低了图像形成装置驱动头与感光 鼓驱动头在切点 P5和 P6处的磨损， 使感光鼓驱动头的定位稳定性提高， 从而使驱动力的 传递更平稳。 实施例十
本领域的普通技术人员很容易就能想到， 两个凸齿中， 一个设置为斜齿， 另一个为直 齿， 也能达到同样的技术效果， 图 25为本实施例所采用的感光鼓驱动头的立体示意图， 由 图知，斜齿 4a倾斜地设置在非扭曲形突起的支撑圆盘 4b上， 直齿 4c垂直地设置在支撑圆 盘 4b上。 实施例 ^一
当图像形成装置的转速较低时， 图像形成装置驱动头的转矩较小， 感光鼓驱动头的两 个凸齿可以全部设置成直齿，如图 26所示为本实施例所采用的感光鼓驱动头的立体示意图， 4d为感光鼓驱动头的凸齿， 感光鼓驱动头的制造精度进一步降低。
本发明中，实施例八至实施例十一中所述凸齿， 以实施例九为例，如图 21和图 22所示， 由图知， 凸齿 4£1与感光鼓驱动头的旋转轴线间的夹角 β选择为 3-40° 之间， 以 25-30° 为最 佳， 保证感光鼓驱动头与图像形成装置驱动头能够顺利地啮合的同时也能够防止在动力传 递过程中感光鼓驱动头从图像形成装置驱动头中脱出， 使图像形成装置驱动头与感光鼓驱 动头间稳定的传递动力； 凸齿 4a从支撑圆盘 4b沿径向方向上的长度为 Ll， L1的范围为 2-5mm 之间， 以 2. 3-3. 3mm最佳， 保证感光鼓驱动头有足够的力矩传递动力。 本发明中， 上述实施例中的所述凸齿， 以实施例九为例， 如图 21、 图 22和图 27所示， 由图知， 凸齿 4a上设置还有啮合面 4al， 啮合面 4al的面积为 5_20mm2之间， 以 7_16mm2为最 佳，力传递时啮合面 4al与图像形成装置驱动头中的动力传输部内壁啮合传递动力，通过在 凸齿 4a上设置啮合面 4al可以减小所述感光鼓驱动头与图像形成装置驱动头间的磨损；所述 凸齿还包括： 顶角 4a2， 与所述凸齿支撑圆盘相连的两个相互平行的平面 4a2和 4a3， 且平面 4a2和 4a3与感光鼓轴线间的夹角为 β； 所述啮合面还包括： 直边 s l、 s2和斜边 s3; 所述直 边 s i和直边 s2是平行的， 斜边 s3与感光鼓轴线间的夹角 φ为 5-50° 之间， 以 10_40° 间为最 佳，直边 s i与感光鼓驱动头中心到凸齿的顶角 4a2的连线间的夹角 γ为 0-90° 之间，以 25_45 。 为最佳， 如图 27-29所示， 图 27中所示的 "B"方向与凸齿的径向延伸方向平行。
本领域普通技术人员从本发明中， 很容易就能想到， 也可将凸齿设置成对称的三个， 该三个凸齿或均设置为倾斜的凸齿、 或均设置为垂直的凸齿、 或其中一个设置为倾斜的凸 齿， 另外两个设置为垂直的凸齿、 或其中一个设置为垂直的凸齿， 另外两个设置为倾斜的 凸齿； 也能达到相同的技术效果。 所述倾斜的凸齿是指所述凸齿倾斜的设置在非扭曲形突 起的支撑圆盘上，所述垂直的凸齿是指所述凸齿垂直的设置在非扭曲形突起的支撑圆盘上。
本领域普通技术人员从本发明中， 很容易就能想到， 所述非扭曲形突起的支撑圆盘和所 述非扭曲形突起圆柱面为同一部件。
一种处理盒，包括感光鼓，还包括上述实施例中任意一个实施例所述的动力传递机构， 所述动力传递机构设置在感光鼓端部。

Claims

权 利 要 求
1. 一种动力传递机构， 包括感光鼓驱动头， 所述感光鼓驱动头与图像形成装置驱动头配 合传递驱动力，所述图像形成装置驱动头包括： 具有三角形横截面的三角形凹槽， 设置 在所述三角形凹槽的三个顶角内的动力传输部， 所述感光鼓驱动头包括从鼓轴端面轴 向伸出的与图像形成装置驱动头上凹槽配合的非扭曲形突起， 所述突起包括限位机构 和受力机构， 其特征是，所述受力机构为倾斜地设置在所述非扭曲形突起上的凸齿， 所 述凸齿上还设置有与所述动力传输部啮合传递动力的啮合面。
2. 如权利要求 1所述的动力传递机构，其特征是，所述限位机构与所述受力机构位于不同 的位置处。
3. 如权利要求 1或 2所述的动力传递机构，其特征是，所述限位机构为所述突起上与所述 凹槽棱边啮合的支撑圆盘。
4. 如权利要求 1所述的动力传递机构，其特征是， 所述凸齿有两个， 分别与所述凹槽的三 个顶角的动力传输部中的两个动力传输部相匹配。
5. 如权利要求 1或 4所述的动力传递机构，其特征是， 所述凸齿与感光鼓驱动头的旋转轴 线间的夹角为 3-40° 。
6. 如权利要求 5所述的动力传递机构，其特征是， 所述倾斜的凸齿与感光鼓驱动头的旋转 轴线间的夹角为 25-30° 。
7. 如权利要求 1或 4所述的动力传递机构，其特征是，所述突起上设置有支撑圆盘， 所述 凸齿从所述非扭曲形突起的支撑圆盘沿径向方向上的长度为 2_5mm。
8. 如权利要求 7所述的动力传递机构，其特征是， 所述凸齿从所述非扭曲形突起的支撑圆 盘沿径向方向上的长度为 2. 3-3. 3mm。
9. 如权利要求 4所述的动力传递机构，其特征是，所述两个凸齿间最小夹角为 120° ，所述 夹角的制造精度上限公差为 2-10° 。
10. 如权利要求 9 所述的动力传递机构，其特征是， 所述夹角的制造精度上限公差为 2-4
11. 如权利要求 1或 4所述的动力传递机构，其特征是，所述凸齿还包括两个与所述支撑圆 盘相连的两个互相平行的平面， 所述啮合面与所述两个平行平面成一个夹角。
12. 如权利要求 1或 4所述的动力传递机构，其特征是，所述啮合面的斜边与感光鼓轴线间 的夹角为 5-50° 。
13. 如权利要求 12所述的动力传递机构，其特征是， 所述啮合面的斜边与感光鼓轴线间的 夹角为 10-40° 。
14. 如权利要求 1或 4所述的动力传递机构，其特征是，所述啮合面包括两条直边， 所述直 边与所述感光鼓驱动头中心到所述凸齿的顶角的连线间的夹角为 0-90° 。
15. 如权利要求 14所述的动力传递机构，其特征是， 所述直边与所述感光鼓驱动头中心到 所述凸齿的顶角的连线间的夹角为 25-45° 。
16. 如权利要求 1或 4所述的动力传递机构，其特征是， 所述啮合面的面积为 5_20mm2。
17. 如权利要求 16所述的动力传递机构，其特征是， 所述啮合面的面积为 7_16mm2。
18. 如权利要求 1或 2所述的动力传递机构，其特征是，所述限位机构包括设置于突起上位 于鼓轴的中轴线位置处的支撑孔和设置于凹槽内的中轴线位置处与所述限位孔相匹配的支 撑突起。
19. 如权利要求 1或 2所述的动力传递机构，其特征是， 所述突起上设置有支撑圆盘和两个 突柱， 所述突柱对称分布在所述突起的两侧， 其中第一突柱为与所述动力传输部啮合的凸 齿， 第二突柱与所述凹槽内壁接触， 所述受力机构为第一突柱， 所述限位机构包括支撑圆 盘和第二突柱。
20. 一种处理盒， 包括感光鼓， 其特征在于， 还包括权利要求 1-19中任意一项所述的动力 传递机构， 所述动力传递机构设置在感光鼓端部。
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