JP2015117723A - Chain type continuously variable transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chain type continuously variable transmission capable of easily assembling a chain guide with a restriction member for the chain guide.SOLUTION: A chain type continuously variable transmission includes: a chain guide 30 including a restriction part 30b restricting a movement of a power transmission chain 20 in a direction orthogonal to a rotational direction of the power transmission chain 20, and an annular part 30a formed integrally with the restriction part 30b and surrounding the power transmission chain 20; a chain guide support shaft 32 provided between a transmission case 22 and a side cover 24 and rotatably supporting the chain guide 30; a first position restriction member 34 that can abut on a first surface 30a1 of the annular part 30a; and a second position restriction member 36 that can abut on a second surface 30a2 of the annular part 30a.

Description

  The present invention relates to a chain-type continuously variable transmission, and more specifically to a chain-type continuously variable transmission having a chain guide that is suitable as an automatic transmission for a vehicle and that suppresses vibration of a power transmission chain. .

  Conventionally, in a chain-type continuously variable transmission used as an automatic transmission of a vehicle, it is known that a chain guide for guiding a chain is installed in a transmission case in order to suppress chain vibration or the like (for example, Patent Document 1).

  In the technique described in Patent Document 1, the input / output pulley is assembled to the transmission case after the chain and the chain guide are attached to the input / output pulley.

JP 2011-208796 A

  By the way, in the technique described in Patent Document 1, by fitting a cylindrical cap guide serving as a fulcrum of the rotation operation of the chain guide and a cylindrical member fixed in advance to the transmission case, In addition to the fulcrum of the turning operation of the chain guide in the transmission case, regulation of the operation in the width direction is also achieved (see FIG. 7). However, in the technique described in Patent Document 1, it is necessary to simultaneously insert a cylindrical member into a cylindrical cap guide provided on each of the input / output pulley bearing and the input pulley side and the output pulley side, There is an inconvenience that the difficulty of assembly work is high. That is, if the vertical accuracy of the cylindrical member fixed in advance to the transmission case is not accurate, the shaft center does not coincide with the shaft center of the cap guide connected to the input / output pulley side, and assembly is not easy. There is an inconvenience.

  An object of the present invention is to provide a chain type continuously variable transmission that can solve the above-described problems and can easily assemble a chain guide and its regulating member.

  In order to solve the above-described problem, in claim 1, an input pulley connected to an input shaft of a transmission, an output pulley connected to an output shaft of the transmission, the input pulley, and an output pulley A power transmission chain that is wound around the power transmission chain to transmit power from the input pulley to the output pulley, a restraining portion that restricts the movement of the power transmission chain in a direction orthogonal to the rotation direction, and the restraining portion integrally A chain guide having an annular portion formed and surrounding the power transmission chain; a transmission case accommodating the input pulley, the output pulley, and the power transmission chain; and a transmission case fixed to a side surface of the transmission case. In a chain type continuously variable transmission having a side cover covering a side opening, the chain guide is provided between the transmission case and the side cover to rotate the chain guide. A chain guide support shaft that is freely supported, and a first position restricting member that is provided on the transmission case and is capable of contacting a first surface of the annular portion of the chain guide that faces the transmission case. And a second position regulating member that is provided on the side cover and is capable of contacting a second surface of the annular portion of the chain guide that faces the side cover.

  According to a second aspect of the present invention, the chain guide support shaft is disposed on the inner peripheral side of the power transmission chain and is configured to inject lubricating oil toward the pulley surface of the input / output pulley.

  According to a third aspect of the present invention, the chain guide support shaft is disposed on the inner peripheral side of the power transmission chain, and communicates an oil passage provided in the transmission case and an oil passage provided in the side cover. It was configured as follows.

  In Claim 1, the chain type which has the chain guide which has the cyclic | annular part which is integrally formed with the restraint part which restricts the motion of the direction orthogonal to the rotation direction of a power transmission chain, and a restraint part, and surrounds a power transmission chain In the continuously variable transmission, a chain guide support shaft that is provided between a transmission case that houses an input / output pulley and a power transmission chain and a side cover that covers an opening on a side surface thereof, and rotatably supports the chain guide; A first position regulating member that is provided in the transmission case and is capable of abutting against a first surface of the annular portion of the chain guide that faces the transmission case; and an annular portion of the chain guide that is provided on the side cover Since the second position restricting member capable of abutting against the second surface of the side face facing the side cover is provided, the assembly of the chain guide and the restricting member is provided. It is possible to perform only the work easily. That is, the chain guide support shaft, which is a fulcrum of the rotation of the chain guide in the transmission case, and the first and second position regulating members that regulate the movement of the chain guide in the width direction are made of different members. Since it comprised so, it is not necessary to align the alignment of several members simultaneously in the case of an assembly | attachment, in other words, the alignment of each member can be aligned individually, and work can be performed easily.

  Further, the first and second position restricting members are not fulcrums of the rotation operation of the chain guide, but are annular portions formed integrally with a restraining portion that restricts the movement in the direction orthogonal to the rotation direction of the power transmission chain. The chain guide can be more reliably restricted from moving in the width direction. More specifically, a clearance is provided at the joint between the chain guide and the chain guide support shaft for the purpose of avoiding damage or deformation of the chain guide or the chain guide support shaft. Therefore, as in the technique described in Patent Document 1, when the movement in the width direction of the chain guide is restricted by the fulcrum position of the turning movement of the chain guide, the distance between the restriction position and the cross-sectional center of the chain is increased. The movement of the chain guide in the width direction (so-called roll behavior) due to the influence of the clearance is increased. However, according to the first aspect, since it is configured as described above, it is possible to reduce the distance between the restriction position for restricting the movement of the chain guide in the width direction and the center of the cross section of the chain, and thus the chain guide is arranged in the width direction. Can be more reliably regulated.

  In addition, although the number of parts is increased, the assembly procedure and equipment of the belt type continuously variable transmission can be used as they are, so that the work of the worker when the production line is shared with the belt type continuously variable transmission The burden can be reduced.

  Since the chain guide support shaft is arranged on the inner peripheral side of the power transmission chain and is configured to inject the lubricating oil toward the pulley surface of the input / output pulley, the effect described above can be obtained. In addition, the work of assembling the chain guide and its regulating member can be performed more easily.

  Also, since the lubrication pipe used in the belt type continuously variable transmission can also be shared by the chain guide support shaft, the parts can be shared with the belt type continuously variable transmission, resulting in an increase in the number of parts. Therefore, it is possible to further reduce the difference in the work load of the worker when the production line is shared with the belt type continuously variable transmission.

  According to a third aspect of the present invention, the chain guide support shaft is disposed on the inner peripheral side of the power transmission chain, and is configured to communicate an oil passage provided in the transmission case and an oil passage provided in the side cover. Therefore, in addition to the above-described effects, the assembly work of the chain guide and its regulating member can be performed more easily.

  That is, the chain guide support shaft can also be used as an oil path transmission path for the control hydraulic fluid of the continuously variable transmission, so that the number of parts is not increased, and the assembly work can be performed more easily. it can.

It is a principal part schematic diagram which shows the chain type continuously variable transmission which concerns on the Example of this invention. It is the side view which looked at the state which removed the side cover of the chain type continuously variable transmission shown in FIG. It is explanatory drawing for demonstrating structures, such as a chain guide shown in FIG. It is the II sectional view taken on the line of FIG. It is explanatory drawing which shows the structure of the chain guide shown in FIG. It is explanatory drawing for demonstrating the assembly | attachment process of the chain type continuously variable transmission shown in FIG. 1 compared with the assembly | attachment process of a belt type continuously variable transmission. It is explanatory drawing which shows the prior art of this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS A mode for carrying out a chain type continuously variable transmission according to the present invention will be described below with reference to the accompanying drawings.

  1 is a schematic view of a main part of a chain type continuously variable transmission according to an embodiment of the present invention. FIG. 2 is a side view of the chain type continuously variable transmission shown in FIG. 1 with a side cover removed. 3 is an explanatory view for explaining the structure of the chain guide shown in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line II of FIG.

  In FIG. 1, reference numeral 10 denotes a continuously variable transmission that is mounted on a vehicle (not shown).

  The continuously variable transmission 10 is of a chain type, and is connected to an input pulley (drive pulley or primary pulley) 14 connected to an input shaft 12 connected to an engine (internal combustion engine, drive source) E, and to an output shaft 16. An output pulley (driven pulley or secondary pulley) 18 and an endless transmission element wound between them and transmitting the output of the engine from the input pulley 14 to the output pulley 18, more specifically, a metal chain (power transmission chain) It consists of 20.

  The input pulley 14 is fixed to the outer peripheral shaft of the input shaft 12 so as not to rotate relative to the outer peripheral shaft and is not movable in the axial direction. And a movable pulley half 14b.

  The output pulley 18 is fixed to the outer peripheral shaft of the output shaft 16 so as not to rotate relative to the outer peripheral shaft and cannot move in the axial direction. The output pulley 18 cannot move relative to the outer peripheral shaft of the output shaft 16 and is relatively movable in the axial direction. And a movable pulley half 18b.

  The transmission case 22 houses the input pulley 14, the output pulley 18, and the chain 20, and the opening of the transmission case 22, more specifically, the surface opposite to the surface on which the engine E is disposed. Is covered with a side cover 24. Accordingly, the input / output pulleys 14 and 18 are rotatably supported by the transmission case 22 and the side cover 24.

  In FIG. 1, the shapes of the transmission case 22 and the side cover 24 are simplified for the convenience of understanding. Although not shown, the continuously variable transmission 10 is connected to the engine E through a forward clutch and a reverse clutch of a forward / reverse switching mechanism.

  The chain 20 has a known shape, specifically, a link plate and a rocker pin (not shown) for connecting a plurality of link plates to each other via a pin hole formed in the link plate. The power is transmitted from the input pulley 14 to the output pulley 18 by the tension of the chain 20.

  As shown in FIG. 2, a chain guide 30 (not shown in FIG. 1) is attached to the chain 20 to restrict movement such as bending and vibration between the input / output pulleys 14 and 18. Specifically, the chain guide 30 has a bilaterally symmetric structure that can be divided into two parts from the vicinity of the center in the width direction of the chain 20, and is attached so as to sandwich the chain 20 from the width direction.

  The chain guide 30 restricts the movement of the chain 20, more specifically, by restricting the movement of the chain 20 in the vertical direction perpendicular to the circumferential direction by sandwiching a part of the circumferential length of the chain 20 up and down. It has a guide part (restraint part) 30b extending in the circumferential direction and an annular part 30a formed integrally with the guide part 30b and surrounding the chain 20.

  A chain guide support shaft 32 (not shown in FIG. 1) is provided on the inner peripheral side of the chain 20 between the transmission case 22 and the side cover 24, so that the chain guide 30 rotates as shown by the arrow in FIG. It is supported movably.

  The chain guide support shaft 32 is made of a pipe-like member, and the chain guide support shaft 32a described in the upper part of the drawing in FIG. 4 has an insertion hole provided at one end on the side surface of the transmission case 22, more specifically, The transmission case 22 is inserted into an insertion hole that communicates with a lubricating oil passage (not shown) provided in the transmission case 22, and the other end abuts against a recess provided appropriately on the side surface of the side cover 24. And held inside the side cover 24.

  Further, the chain guide support shaft 32b described below in FIG. 4 has an insertion hole provided at one end on the side surface of the side cover 24, more specifically, a lubricating oil path (see FIG. The other end is held in the transmission case 22 and the side cover 24 by being brought into contact with a recess appropriately provided on the side surface of the transmission case 22.

  The chain guide support shaft 32 is provided with a lubricating oil injection port (not shown), and the lubricating oil supplied from the lubricating oil passage of the transmission case 22 or the side cover 24 is supplied to the surfaces of the input / output pulleys 14 and 18. In order to cool the chain 20, injection is performed as appropriate. That is, the chain guide support shaft 32 can also be used as a lubrication pipe. Therefore, there is no need to provide a separate lubrication pipe and the number of parts does not increase, so that the assembly work is facilitated and the work of the worker when the production line is shared with the belt type continuously variable transmission It becomes possible to further reduce the load difference.

  Further, any one of the chain guide support shafts 32 may be configured not to provide the lubricating oil injection port but to connect the oil passages respectively provided in the transmission case 22 and the side cover 24. That is, one of the chain guide support shafts 32 can be used as a lubrication pipe, and the other can be used as an oil passage for control oil of the continuously variable transmission 10.

  Further, the transmission case 22 is provided with a first position restricting member 34 (not shown in FIG. 1) so as to be in contact with the annular portion 30 a of the chain guide 30. More specifically, the first position restricting member 34 is arranged in the transmission case so that it can come into contact with the surface (first surface) 30a1 facing the transmission case 22 of the annular portion 30a of the chain guide 30. 22 is provided.

  Further, the side cover 24 is provided with a second position restricting member 36 (not shown in FIG. 1) so as to be able to contact the annular portion 30 a of the chain guide 30. More specifically, the second position restricting member 36 is attached to the side cover 24 so as to be able to come into contact with the surface (second surface) 30a2 facing the side cover 24 of the annular portion 30a of the chain guide 30. Provided.

  That is, the operation of the chain guide 30 in the width direction is restricted by the first and second surfaces 30a1 and 30a2 coming into contact with the first and second position restricting members 34 and 36. The first and second position regulating members 34 and 36 are fixed by being screwed to the transmission case 22 and the side cover 24, respectively.

  As described above, in the embodiment of the present invention, the chain guide support shaft 32 that rotatably supports the chain guide 30 and the first and second that regulate the movement of the chain guide 30 in the width direction. The position restricting members 34 and 36 are formed of different members.

  FIG. 5 is an explanatory view showing the structure of the chain guide 30 of the chain type continuously variable transmission 10 according to the embodiment of the present invention.

  As described with reference to FIGS. 3 and 4, in the embodiment of the present invention, the first and second position restricting members 34 of the chain guide 30 have the first and second surfaces 30a1 and 30a2 of the annular portion 30a. , 36, the movement in the width direction is restricted. On the other hand, in the prior art, the operation in the width direction is also restricted by a member that rotatably supports the chain guide (a member corresponding to the chain guide support shaft 32 shown by a broken line in FIG. 5). Configured.

  Therefore, as shown in FIG. 5, in the embodiment of the present invention, the operation of the chain guide 30 in the width direction can be restricted over a wider range than in the prior art. Therefore, it is possible to more reliably regulate the movement of the chain guide 30 in the width direction.

  More specifically, a clearance (not shown) is provided at the joint between the chain guide 30 and the chain guide support shaft 32 for the purpose of avoiding damage or deformation of the chain guide 30 or the chain guide support shaft 32. Provided. Therefore, when the movement in the width direction of the chain guide is restricted by the fulcrum position of the turning movement of the chain guide 30 as in the prior art, the distance between the restriction position and the center of the cross section of the chain 20 becomes large. The movement of the chain guide 30 in the width direction (so-called roll behavior) due to the influence of the above increases. However, in the embodiment of the present invention, since it is configured as described above, the restriction positions (first and second surfaces 30a1, 30a2) for restricting the movement of the chain guide 30 in the width direction and the center of the cross section of the chain 20 The distance up to can be reduced, and therefore the movement of the chain guide 30 in the width direction can be more reliably regulated.

  FIG. 6 is an explanatory diagram for explaining the assembly process of the chain type continuously variable transmission 10 according to the embodiment of the present invention in comparison with the assembly process of the belt type continuously variable transmission.

  Briefly described below, in the belt-type continuously variable transmission, as shown in FIG. 6 (a), a combination of input / output pulleys 14 and 18 and a power transmission belt is accommodated in a transmission case 22, and a bolt And fix with nuts. Thereafter, the lubrication pipes for the input / output pulleys 14 and 18 are inserted, and the side cover is attached to complete the assembly process.

  On the other hand, in the case of the chain type continuously variable transmission 10 according to the embodiment of the present invention, as shown in FIG. 6B, the assembly of the input / output pulleys 14 and 18, the chain 20, and the chain guide 30 is the first position. It accommodates in the transmission case 22 to which the regulating member 34 is attached, and is fixed using bolts and nuts. Thereafter, the chain guide support shaft 32 also serving as a lubrication pipe is inserted. More specifically, the chain guide support shaft 32a is inserted into the transmission case 22, and the chain guide support shaft 32b is inserted into the side cover 24. The assembly process is completed by attaching the side cover 24 to which the second position regulating member 36 is attached.

  That is, although the number of parts is increased as compared with the belt-type continuously variable transmission, the assembly procedure and equipment of the belt-type continuously variable transmission can be used for assembling the chain-type continuously variable transmission 10 as they are. Therefore, even when the belt-type continuously variable transmission and the chain-type continuously variable transmission 10 share a production line, the work load on the worker can be reduced.

  Further, since the chain guide support shaft 32 can be inserted and fixed in the insertion holes of the transmission case 22 and the side cover 24 independently of the operation of assembling the input / output pulleys 14 and 18 to the transmission case 22, Assembly work can be performed easily.

  As described above, in the embodiment of the present invention, the input pulley 14 connected to the input shaft 12 of the transmission, the output pulley 18 connected to the output shaft 16 of the transmission, and the input pulley 14 A power transmission chain (chain) 20 that is wound around the output pulley 18 to transmit power from the input pulley 14 to the output pulley 18, and a restraining portion that restricts the movement of the chain 20 in the direction orthogonal to the rotational direction. (Guide part) 30b and transmission part case which accommodates the chain guide 30 which has the annular part 30a which is integrally formed with the said restraint part 30b, and surrounds the said power transmission chain, the said input pulley 14, the output pulley 18, and the chain 20 22 and a side cover 24 that is fixed to a side surface of the transmission case 22 and covers an opening on the side surface of the transmission case 22 In the step transmission 10, a chain guide support shaft 32 provided between the transmission case 22 and the side cover 24 and rotatably supporting the chain guide 30, and provided on the transmission case 22 and the chain. Of the side surface of the annular portion 30 a of the guide 30, a first position restricting member 34 capable of contacting the first surface 30 a 1 facing the transmission case 22, and the side cover 24 provided on the side cover 24. Since the second position restriction member 36 capable of contacting the second surface 30a2 facing the side cover 24 among the side surfaces of the annular portion 30a is provided, the chain guide 30 and its restriction member (first member) Assembling work of the second position restricting members 34, 36) can be easily performed. That is, the chain guide support shaft 32 that becomes a fulcrum of the rotation operation of the chain guide 30 in the transmission case 22 and the first and second position restriction members 34 and 36 that restrict the movement of the chain guide 30 in the width direction. Therefore, it is not necessary to align the plurality of members at the same time during assembly, and the operation can be easily performed.

  In addition, the first and second position regulating members 34 and 36 and the chain guide 30 are provided not to be pivotal, but to be able to come into contact with the annular portion 30a that regulates the movement in the direction orthogonal to the rotation direction of the chain 20. Therefore, the movement of the chain guide 30 in the width direction can be more reliably regulated. More specifically, a clearance (not shown) is provided at the joint between the chain guide 30 and the chain guide support shaft 32 for the purpose of avoiding damage or deformation of the chain guide 30 or the chain guide support shaft 32. Provided. Therefore, when the movement of the chain guide 30 in the width direction is restricted by the fulcrum position (chain guide support shaft 32) of the rotation operation of the chain guide 30 as in the technique described in Patent Document 1, the restriction position and the cross-section of the chain 20 Since the distance to the center is increased, the movement of the chain guide 30 in the width direction (so-called roll behavior) due to the influence of the clearance is increased. However, in this embodiment, since it is configured as described above, the distance from the restricting position for restricting the movement of the chain guide 30 in the width direction to the center of the cross section of the chain 20 can be reduced. Can be more reliably restricted from moving in the width direction.

  In addition, although the number of parts is increased, the assembly procedure and equipment of the belt type continuously variable transmission can be used as they are, so that the work of the worker when the production line is shared with the belt type continuously variable transmission It becomes possible to reduce the load difference.

  Further, the chain guide support shaft 32 is arranged on the inner peripheral side of the chain 20 and is configured to inject lubricating oil toward the pulley surfaces of the input / output pulleys 14 and 18, so that the above-described effects are obtained. In addition, the assembly work of the chain guide 30 and its restricting members (first and second position restricting members 34 and 36) can be performed more easily.

  In addition, since the lubrication pipe used in the belt type continuously variable transmission can also be shared by the chain guide support shaft 32, parts can be shared with the belt type continuously variable transmission, resulting in an increase in the number of parts. Therefore, it becomes possible to further reduce the difference in the work load of the worker when the production line is shared with the belt type continuously variable transmission.

  The chain guide support shaft 32 is disposed on the inner peripheral side of the power transmission chain 20 and is configured to communicate an oil passage provided in the transmission case 22 and an oil passage provided in the side cover 24. Therefore, in addition to the effects described above, the assembly work of the chain guide 30 and its restricting members (first and second position restricting members 34 and 36) can be performed more easily.

  That is, the chain guide support shaft 32 can also be used as an oil path transmission path for the control hydraulic fluid of the continuously variable transmission 10, so that the number of parts is not increased, and the assembly work is further facilitated. be able to.

  Although the supply capacity of the lubricating oil to the input / output pulleys 14 and 18 and the chain 20 is inferior, the chain guide support shaft 32 rotates the chain guide 30 from the outer peripheral side of the chain 20 as shown by a broken line in FIG. You may make it support freely.

  In the above-described embodiment, the first and second position regulating members 34 and 36 are described by way of example in which the first and second position restricting members 34 and 36 are respectively screwed and fixed to the transmission case 22 and the side cover 24. For example, the mold may be designed so that insertion holes for inserting the first and second position regulating members 34 and 36 are provided in the process of forming the transmission case 22 and the side cover 24. Alternatively, the first and second position regulating members 34 and 36 may be formed on the transmission case 22 and the side cover 24 itself. In such a case, the number of parts can be reduced.

  10 chain type continuously variable transmission, 12 input shaft, 14 input pulley, 16 output shaft, 18 output pulley, 20 chain (power transmission chain), 22 transmission case, 24 side cover, 30 chain guide, 30a annular portion, 30a1 1st surface, 30a2 2nd surface, 30b guide part (restraint part), 32 chain guide support shaft, 34 1st position control member, 36 2nd position control member

Claims (3)

  An input pulley connected to the input shaft of the transmission, an output pulley connected to the output shaft of the transmission, and is wound between the input pulley and the output pulley to transmit power from the input pulley to the output pulley. A power transmission chain for transmission, a restraint portion for restricting movement in a direction orthogonal to the rotational direction of the power transmission chain, and a chain guide formed integrally with the restraint portion and having an annular portion surrounding the power transmission chain; A chain-type continuously variable transmission comprising: a transmission case that houses the input pulley, the output pulley, and the power transmission chain; and a side cover that is fixed to a side surface of the transmission case and covers an opening on the side surface of the transmission case. A chain guide support shaft provided between the transmission case and a side cover and rotatably supporting the chain guide; and the transmission A first position restricting member which is provided on the side cover and is capable of contacting a first surface of the annular portion of the chain guide facing the transmission case, and the chain guide provided on the side cover. A chain type continuously variable transmission comprising: a second position restricting member capable of contacting a second surface of the annular portion facing the side cover.   2. The chain guide support shaft is disposed on an inner peripheral side of the power transmission chain, and is configured to inject lubricating oil toward a pulley surface of the input / output pulley. Chain type continuously variable transmission.   The chain guide support shaft is arranged on the inner peripheral side of the power transmission chain, and is configured to communicate an oil passage provided in the transmission case and an oil passage provided in the side cover. The chain type continuously variable transmission according to claim 1, wherein:

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