JPH051059U - Gear noise reduction device for transmission - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a gear squeal prevention device for a transmission, which has a simple structure and can prevent gear squeal during a shift to reverse [Construction] A shift rod for operating a synchronous meshing device for selecting the forward gear device of the forward shift stage and a reverse gear device, and the shift rod is engaged by the rotation around the axis line, and the shift rod is moved by the axial movement. A gear squeal preventing device used in a gear transmission having a control rod for shifting the synchronous meshing device and the reverse gear device to operate the synchronous meshing device and the reverse gear device. Between the rod and the control rod, the shift rod is moved to the specific forward speed stage with the rotation of the control rod toward the shift rod. A cam mechanism for shifting is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  INDUSTRIAL APPLICABILITY The present invention is applied to a gear transmission equipped with a selectively sliding reverse gear device. The present invention relates to a noise suppression device.

[0002]

[Prior art]

  Connected to the drive shaft and the primary shaft connected to the engine via the clutch Multiple gear units are installed between the secondary shaft and the selected secondary shaft, and one of them can be selectively Automatic transmission that switches the gear ratio between both shafts by setting the transmission state to In a car gear transmission, a gear that is always meshing is used as the forward gear device. And a synchronous mesh to smoothly switch it from the non-transmission state to the transmission state. A device is provided. On the other hand, for the reverse gear device, Reverse primary gear on the secondary shaft and reverse secondary gear on the secondary shaft. By sliding one of the reverse idle gears between the gear and both gears. A selective-sliding type gear device is used that meshes these into a transmission state. This is Riva The gear shifting operation is usually performed with the secondary shaft stopped, and the After the clutch is disengaged, the reshaft quickly decreases its rotation due to the viscous resistance of the oil. Therefore, even a simple sliding gear device with a structure that does not have a synchronous meshing device can be engaged. The front engine front door, which can be fitted to the front engine In live vehicles, it is necessary to make the axial dimension of the gear transmission as short as possible. This is because that.

[0003]   However, recently, for example, to improve the operability of the transmission, it is used as a lubricating oil. Low viscosity oil such as dynamic transmission oil tends to be used, and reverse oil Inertial rotation of the primary shaft easily decreases even if the clutch is disengaged when shifting to If the shift operation is performed immediately after the clutch is disengaged, the primary When a meshing noise is generated due to the rotation difference between the shaft and the secondary shaft There is a problem.

[0004]   In order to solve the above-mentioned problem, when shifting to reverse, It suffices to take measures to reduce the inertial rotation of the crab primary shaft. Means However, for example, Japanese Utility Model Publication No. Sho 64-5154 discloses that when shifting gears to reverse, Reverse primary gear on reshaft and reverse seca on secondary shaft Before the primary gear meshes with the reverse idle gear between both gears, the primary chassis Transmission of the gear shaft and the secondary shaft, and inertial rotation of the primary shaft A pair of meshing gears and a synchronizer ring to reduce the Proposing a rake device.

[0005]

[Problems to be solved by the device]

  However, in the brake device of Japanese Utility Model Publication No. Sho 64-5154, a pair of gears that mesh with each other is used. The structure of the transmission is complicated because it is necessary to newly install the gear and the synchronizer ring. There was a problem of becoming.   Therefore, the purpose of the present invention is to prevent gear squeal when shifting to reverse with a simple structure. It is to provide a gear squeal prevention device for a transmission that can perform such a transmission.

[0006]

[Means for Solving the Problems]

  In order to solve the above problems, in the present invention, an engine is provided with a clutch. The connected primary shaft and the primary shaft are arranged parallel to and It is arranged between the secondary shaft provided with the force gear and by the synchronous meshing device. Multiple forward gears to be selected and a river mounted on the primary shaft Secondary gear, reverse secondary gear mounted on secondary shaft And a selective sliding type reverse consisting of a reverse idle gear that meshes with both gears A gear device, and the synchronous meshing device is a gear driven by the operation of a shift lever. A control rod and a plurality of shift rollers that selectively engage the control rod. The control rod is operated to select the shift lever. More about the axis of rotation to selectively engage a predetermined one of the plurality of shift rods, After that, the shift lever is operated to shift in the axial direction to move to the predetermined shift position. The shift lever is operated so that a specific one of the plurality of shift rods is Shift operation to specific forward gear and reverse gear And the synchronous gear for selecting the forward gear device of the specific forward gear stage. The coupling device and the reverse gear device are respectively the features of the specific shift rod. Operates by the shift operation to the constant forward speed and the shift operation to the reverse speed A gear squeal preventing device used in a gear transmission configured to: Between the control rod and the specific shift rod, the shift lever selector Movement of the control rod toward the specific shift rod A cam machine for shifting the specific shift rod to the specific forward speed Provided is a gear squeal preventing device for a transmission, which is characterized in that a structure is provided.

[0007]   In a preferred aspect of the present invention, the cam mechanism is driven by a shift lever. The force is transmitted, and it is arranged adjacent to the input member provided on the control rod. It

[0008]

[Action]

  As described above, in the present invention, the control rod and the specific forward speed Between a specific shift rod that performs shift operation and shift operation to reverse gear The cam mechanism provided on the control rod faces the specific shift rod of the control rod. Shift of the specific shift rod to the specific forward shift speed To operate. As a result, the forward gear device of the specific forward speed is selected. The secondary meshing device is activated and stopped, and the secondary shaft and inertial rotating The primary shaft is reduced in rotation due to the transmission with the imbalance shaft. Servant After that, the control rod is shifted to the reverse side and the primary chassis Reverse primary gear on ft and reverse secondary on secondary shaft When the gear meshes with the reverse idle gear between both gears, No meshing noise due to the difference in rotation with the secondary shaft is generated.

[0009]   Since the cam mechanism can have a simple structure, it can be installed easily. The structure of the transmission is less complicated.

[0010]

【Example】

  The present invention will be described below based on an embodiment of a gear transmission for a front-wheel drive vehicle shown in the accompanying drawings. I will explain.   As shown in FIG. 1, the gear transmission 1 includes a transmission case 2 and bearings 3 and 3. Is rotatably supported via a clutch and is connected to the engine output shaft 5 via a clutch 4. The primary shaft 6 and the bearings 7, 7 in the transmission case 2 as well. A secondary shaft parallel to the primary shaft 6 rotatably supported via And a chaft 8. And this primary shaft 6 and secondary shaft Between the primary gears 11, 12, 13, 1 on the primary shaft 6 4, 15 and secondary gears 16, 17, 18 which are always meshed with these gears, respectively. Gears for 1st speed, 2nd speed, 3rd speed, 4th speed and 5th speed Devices 21, 22, 23, 24, 25 are provided. Here, each gear device 21 to One of the gears 11, 12, 18, 19, 15 that compose 25 is the shaft 6 or 8 is integrally formed with or spline-fitted so as to rotate integrally with the shaft. And the other gear 16, 17, 13, 14, 20 is associated with the shaft 6 or 8 Is loosely fitted relative to the. And a gear device for the first speed and the second speed 21 and 22, between secondary shaft 8 loosely fitted gears 16 and 17, 3 It is loosely fitted to the primary shaft 6 in the speed and fourth speed gear devices 23 and 24. Between the gears 13 and 14 and the secondary shaft 8 in the gear device 25 for the fifth speed Behind the gear 20 loosely fitted to the One of the loosely fitted gears 16, 17, 13, 14, 20 described above is attached to the shaft 6 concerned. Or a synchronous meshing device 2 for 1-2 speed, 3-4 speed, and 5 speed selectively coupled to 8 6, 27, 28 are provided.

[0011]   The structure of this synchromesh device is used for the fifth speed provided at the rear end of the secondary shaft 8. Taking the device 28 of FIG. 2 as an example, the device 28 is installed on the secondary shaft 8. Clutch hub 29 fitted with a spline, and a fifth-speed second gear positioned on the side of the clutch hub 29. A gear spline 30 fixed to the re-gear 20 and a spline around the outer periphery of the hub 29. In-fitted clutch hub sleeve 31, and between the sleeve 31 and the hub 29 A plurality of keys 32 interposed between the sleeve 31 and the gear spline 30. It is composed of a synchronizer ring 33 interposed therebetween. And the club Shift hub sleeve 31 is engaged with a peripheral groove 31a formed on the outer periphery thereof. When the fork 34 (see FIG. 2) is slid toward the gear 20, Theizer ring 33 is engaged with the sleeve 31 and the key 32 is used to move the gear. The ring 33 is pressed by being pressed against the cone portion 30a of the spline 30. The rotation of the sleeve 31 and the rotation of the gear spline 30 are synchronized with each other, and then the three The slider 31 is slid so that it fits over the hub 29 and the gear spline 30. Be done. As a result, the gear 20 moves to the gear spline 30, the sleeve 31, and the hub 29. Is coupled to the secondary shaft 8 via.

[0012]   On the other hand, it is provided between the primary shaft 6 and the secondary shaft 8. A reverse gear device 35 is provided between the first speed gear device 21 and the second speed gear device 22. ing. The reverse gear device 35 is formed integrally with the primary shaft 6. Reverse primary gear 36 and the above-mentioned 1-2 speed on the secondary shaft 8. Formed on the outer periphery of the clutch hub sleeve 26a in the synchronous meshing device 26 for The reverse secondary gear 37 and the idle secondary shaft 38 are rotated as shown in FIG. It is rotatably and slidably supported and always meshes with the reverse secondary gear 37. It is composed of the reverse idle gear 39 which is passed through. And the idol When the ya 39 is slid backward (left in the drawing) by the shift device described later, These three reverse gears are engaged by meshing with the reverse primary gear 36. The gears 36, 39 and 37 are in the transmission state, and the primary shaft 6 and the secondary shaft are The shaft 8 is connected. Here, the secondary shaft 8 is formed at the front end. Via an output gear 9 and an input gear 10 of a differential device (not shown) that meshes with the output gear 9. The left and right front wheels are connected to the differential device.

[0013]   Next, the shift device for setting the reverse gear device 35 in the transmission state will be described. Then, as shown in FIG. 2, first, the primary chassis is attached to the transmission case 2. The shift rod 40 for the fifth speed-reverse is parallel to the gear 6 and the secondary shaft 8. Are slidably supported in the axial direction. Similarly, the transmission case The control rod 41 slides in the axial direction parallel to the shift rod 40. It is supported so as to be rotatable and rotatable about its axis. On the control rod 41 The sleeve 42 is externally fitted and fixed, and the sleeve 42 is attached via the spherical projection 42a. It is connected to a shift lever (not shown). Operate the shift lever (not shown) The control rod 41 moves to the 5th speed-reverse position to perform a select operation (axial (Rotation around the line), and is fixed to the control rod 41 with the selection operation. The attached engagement pin 43 is attached to the shift rod 40 for fifth speed / reverse It engages with an engagement groove 44 a formed in the groove 44. Next shift lever (not shown) Shift operation of the control rod 41 that interlocks with the operation (slide in the axial direction) As a result, the shift rod 40 slides back and forth, and when operating to the 5th speed, the shift rod 40 moves forward (A Direction), and when it is operated to reverse, they are slid backward (direction B). Pickpocket A wave 42b extending in the axial direction of the control rod 41 is formed on the tube 42. And the ball member 46 urged by the spring 45 is engaged with the corrugated 42b. are doing. The engagement between the corrugated 42b and the ball member 46 causes the control lock The amount of shift operation of the drive 41 is controlled to an appropriate value. On the rear end of the shift rod 40 The shift force engaged with the clutch hub sleeve 31 of the fifth speed synchronous meshing device 28. 34 is fixed to the sleeve 31 by sliding the rod 40 forward. Slides forward and the 5th-speed secondary gear 20 moves to the secondary shuffling position as described above. 8 are connected. In addition, as shown in FIG. 2, fitted and fixed to the front portion of the shift rod 40. A shift fork 47 is integrally formed on the side surface of the formed sleeve 44, and The ark 47 is engaged with the circumferential groove 39 a of the reverse idle gear 39. This , When the shift rod 40 is slid backward (direction B), the shift fork 4 7 moves in the C direction, and accordingly, the reverse idle gear 39 moves rearward, that is, It slides in the direction in which it meshes with the reverse primary gear 36 shown in FIG. At this time, As the shift rod 40 slides rearward, the shift fork 34 The clutch hub sleeve 31 in the fifth speed synchronous meshing device 28 is replaced by the clutch hub 29. Played over and slid backward.

[0014]   In addition to the above configuration, the transmission 1 is provided with the following gear noise prevention device. It has been burned. That is, as shown in FIG. 3 and FIG. The cam plate 50 is fixed to the sleeve 42 of the Is a cam groove 5 extending in the circumferential direction starting from one side portion and terminating near the other side portion. 0a is formed. The cam groove 50a has a start end and an end that are at the same axial position. The center portion forms a curve protruding forward (direction A in FIG. 2). On the other hand A pin 51 that engages with the cam groove 50a is fixed to the sleeve 44 of the lid 40. ing. As shown in the figure, the gear of this embodiment is composed of a cam plate 50 and a pin 51. The anti-squeal device has a very simple structure. The structure of the speed machine 1 does not become complicated. Further, the cam plate 50 is provided with a shift lever (not shown). In the vicinity of the spherical protrusion 42a that is connected to the bar and transmits the operating force from the shift lever Since it is installed, the control rod is twisted and deformed by the reaction force from the cam mechanism. The risk of causing

[0015]   Next, the reverse of the transmission 1 equipped with the gear noise preventing device configured as described above. The operation during the shift operation to the shift speed will be described.   First, disengage the clutch and then operate the shift lever (not shown) to Select operation is performed with the rod rod 41 directed toward the fifth speed-reverse position. This , The control rod 41 and the cam plate 50 are indicated by arrows in FIGS. Rotate in the direction. With the rotation, the pin 51 moves from the start end to the end in the cam groove 50a. Move towards. When moving in the cam groove 50a, the pin 51 moves forward, that is, When it moves a little in the direction A of FIG. 2 and reaches the end of the cam groove 50a, the initial position, That is, the control rod 41 is selected toward the fifth speed-reverse position. Return to the position in the front-rear direction in the state before the operation. As a result, the control rod 41 Shift rod 40 slightly when the select operation is performed toward the fifth-reverse position. It slides forward and the shift fork 34 fixed to the rear end of the rod 40 is used. Then, the clutch hub of the 5th speed synchromesh 28 on the secondary shaft 8 The leave 31 is slid slightly forward, and the sliding causes the synchronizer ring 33 to move. Engages with the sleeve 31 and the ring 33 is engaged with the gear sprung via the key 32. Slightly pressed against the line 30. At this time, the secondary shaft 8 is stopped , A clutch hub sleeve 31 and a synchronizer engaged with the sleeve 31 The secondary gear 20 inertially rotates while the ring 33 also stops rotating. Is the primary shaft 6 rotating through the primary gear 15? Between the cone portion 30a of the gear spline 30 and the synchronizer ring 33. Sliding resistance is generated, and this occurs via the secondary gear 20 and the primary gear 15. The primary shaft 6 acts as a braking force.

[0016]   After that, operate the shift lever (not shown) to move the control rod 41 Shift operation toward the base position. As a result, the engagement pins 43 that engage with each other The shift rod 40 moves rearward (direction B in FIG. 2) through the engaging groove 44a and The verse idle gear 39 starts to mesh with the reverse primary gear 36. At this time , The reverse primary gear 36 integrated with the primary shaft 6 has the above braking force. Both gears 36 and 39 are engaged because the rotation is sufficiently reduced or stopped by Interlocks smoothly without generating noise.

[0017]   In the above embodiment, the synchromesh devices 26, 2 for 1-2 speed, 3-4 and 5 speeds. 7 and 28 are provided, and the 5th speed synchromesh device 28 and the reverse gear device 35 are set to the 5th speed. -Although they are connected by the reverse shift rod 40, the present invention is applicable to the transmission having the above structure. However, the present invention is not limited to, for example, 1st speed, 2-3 speeds and 4-5 speeds. An interlocking device is provided to connect the reverse gear device and the first speed synchronous engaging device. It can also be used in a transmission provided with a shift rod.

[0018]

【effect】

  As described above, in the present invention, the control rod and the specific forward shift A specific shift rod that performs a shift operation to a shift stage and a shift operation to a reverse shift stage And a cam mechanism provided between the control rod and the specific shift rod. The specific shift rod to the specific forward speed Shift operation to. Thereby, the forward gear device of the specific forward speed is selected. Synchronous gear is operating and inertial rotation occurs with the secondary shaft stopped. The primary shaft is in a transmission state and the rotation of the primary shaft decreases. It Therefore, after that, the control rod is shifted to the reverse side and the primer Reverse primary gear on reshaft and reverse seca on secondary shaft When the secondary gear meshes with the reverse idle gear between both gears, the primary shear The meshing noise due to the rotation difference between the shaft and the secondary shaft does not occur.

[0019]   Since the cam mechanism can have a simple structure, it can be installed easily. The structure of the transmission is less complicated.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a gear transmission including a gear noise reduction device according to an embodiment of the present invention.

2 is a side view of a shift rod and a control rod of the transmission shown in FIG.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 is a view taken along the line IV-IV in FIG.

[Explanation of symbols]

28 5th speed synchromesh device 29 Clutch hub 30 gear splines 31 Clutch hub sleeve 32 keys 33 Synchronizer ring 34 shift forks 36 Reverse primary gear 37 Reverse Secondary Gear 39 Reverse idle gear 40 5th-reverse shift rod 41 control rod 42 sleeve 43 Engagement pin 50 cam plate 50a cam groove 51 pin

Claims (2)

[Scope of utility model registration request] 1. A synchronous shaft is provided between a primary shaft connected to an engine via a clutch and a secondary shaft provided in parallel with the primary shaft and provided with an output gear, and selected by a synchronous meshing device. A selective sliding reverse gear including a plurality of forward gear devices, a reverse primary gear arranged on the primary shaft, a reverse secondary gear arranged on the secondary shaft, and a reverse idle gear meshing with the both gears. And a control rod driven by the operation of the shift lever and a plurality of shift rods selectively engaged with the control rod, the control rod being the control lever of the shift lever. Rotate around the axis by the select operation and selectively A predetermined one of the plurality of shift rods is engaged with a predetermined one and then moved in the axial direction by a shift operation of the shift lever to shift the predetermined shift rod. Accordingly, the synchronous meshing device and the reverse gear device, which perform a shift operation to a specific forward shift stage and a shift operation to a reverse shift stage, and select a forward gear device of the specific forward shift stage, respectively, are the specific gears described above. Is a gear squeal preventing device used in a gear transmission configured to operate by a shift operation of the shift rod to the specific forward speed and a shift operation to the reverse speed, the control rod including: , The rotation of the control rod toward the specific shift rod by the select operation of the shift lever between the specific shift rod and I, the gear whine prevention device for a transmission, wherein a cam mechanism for shifting operation the specific shift rod to the particular forward gears are provided. 2. The shift mechanism according to claim 1, wherein the cam mechanism is disposed adjacent to an input member provided on the control rod, to which the driving force from the shift lever is transmitted. Gear noise prevention device.