Anti-impact synchronizer

Abstract

The invention relates to the technical field of synchronizers, in particular to an anti-impact synchronizer. The gear shifting device comprises a device body, the device body comprises a spline roller, and a synchronous main frame used for gear shifting and a gear ring connected to the spline roller in a sleeving mode and used for being matched with the synchronous main frame are arranged at the spline roller; a synchronous locking ring is arranged on the synchronous main frame and provided with an inner conical surface used for being matched with the gear ring, and a friction piece used for making friction contact with the gear ring is detachably arranged on the inner conical surface. Compared with the prior art, friction is carried out through the detachable friction piece and the gear ring, follow-up replacement is facilitated, replacement of the whole gear ring is avoided, the maintenance cost is reduced, meanwhile, during manufacturing, only the abrasion resistance of the friction piece needs to be considered, the whole gear ring part can be produced through other low-cost materials, and the manufacturing cost is reduced. The overall abrasion resistance of the gear ring can be guaranteed, and the overall manufacturing cost of the device can be adjusted according to actual use conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of synchronizers, and in particular to an impact-resistant synchronizer. Background Art

[0002] A synchronizer is a mechanical device used to achieve synchronous movement between different gears in a mechanical transmission system, ensuring that the gears can be smoothly and accurately engaged when shifting gears. The working principle of the synchronizer is mainly based on the friction principle. Taking the widely used inertia synchronizer as an example, it is mainly composed of a coupling sleeve, a synchronous lock ring, etc. When shifting gears, the synchronous lock ring is in friction contact with the ring gear. When there is a speed difference between the coupling sleeve and the ring gear, the friction of the synchronous lock ring will cause the speeds of the two to become consistent, thereby achieving synchronization.

[0003] The synchronous lock ring in the synchronizer is in frictional contact with the ring gear, and friction will be generated between the inner cone surface of the synchronous lock ring and the outer cone surface of the ring gear. When used for too long, the fitting clearance between the inner and outer cone surfaces will increase, thereby affecting the synchronization effect. At the same time, it will also cause an increase in the impact force when shifting gears, affecting the smoothness of the gear shifting. Summary of the invention

[0004] The present invention provides an impact-resistant synchronizer, which can overcome the defect in the prior art that a synchronization lock ring and a gear ring are easily worn, thereby affecting the synchronization effect of the synchronizer.

[0005] According to the present invention, an impact-resistant synchronizer includes a device body, which includes a spline roller, a synchronization main frame for gear shifting and a gear ring sleeved on the spline roller for cooperating with the synchronization main frame; a synchronization locking ring is provided on the synchronization main frame, and the synchronization locking ring has an inner conical surface for cooperating with the gear ring, and a friction piece for frictional contact with the gear ring is detachably provided on the inner conical surface.

[0006] Compared with the prior art, the present application uses a detachable friction part to rub against the ring gear, which is convenient for subsequent replacement, avoids replacing the entire ring gear, and reduces maintenance costs. At the same time, during manufacturing, only the wear resistance of the friction part needs to be considered, and the entire ring gear component can be produced using other lower-cost materials, which can not only ensure the overall wear resistance of the ring gear, but also adjust the overall cost of the device according to actual usage.

[0007] Preferably, a mounting cavity is provided along the axis of the inner conical surface, the friction member comprises a mounting shell detachably arranged in the mounting cavity, a docking portion is formed in the mounting cavity, and a matching hole for matching with the docking portion is provided on the outer wall of the mounting shell.

[0008] In the present invention, the mounting shell is placed in the mounting cavity, the matching hole is aligned with the docking portion, and the mounting shell is fixed in the mounting cavity by driving bolts, thereby realizing the detachable connection between the friction member and the synchronous locking ring.

[0009] Preferably, the gear ring has an outer conical surface corresponding to the friction member, the outer conical surface is located on one side of the friction member and axially forms an annular surface, a plurality of pressing cavities are formed in the mounting shell, and extrusion blocks for extruding the annular surface are slidably arranged in the plurality of pressing cavities.

[0010] In the present invention, the annular surface on the gear ring will penetrate into the annular surface of the mounting shell, and the extrusion block in the pressing cavity will squeeze the inner annular surface, thereby further improving the overall friction between the synchronization lock ring and the gear ring and accelerating the synchronization effect.

[0011] Preferably, a sealing plate for sealing the pressing cavity is provided on the outer wall of the mounting shell opposite to the mounting cavity, a connecting groove connected to the pressing cavity is penetrated through the outer wall of the sealing plate, and a pushing block for penetrating into the pressing cavity and squeezing the extrusion block is slidably provided in the connecting groove.

[0012] In the present invention, the outer conical surface on the gear ring pushes the push block sliding in the connecting groove, so that the push block pushes the extrusion block to rub and tighten the annular surface.

[0013] Preferably, an annular plate for frictionally contacting with the outer conical surface and pushing the pushing block is detachably provided at one end of the outer wall of the pushing block away from the extrusion block.

[0014] In the present invention, the end of the push block is detachably provided with an annular plate that can rub against the outer cone surface, thereby increasing the friction between the synchronization lock ring and the gear ring, and further improving the synchronization efficiency.

[0015] Preferably, reset cavities are provided on both sides of the pressing cavity, the extrusion block has a sliding part for sliding in the reset cavity, the inner wall of the reset cavity is detachably provided with a guide column slidably connected to the sliding part, and the outer wall of the guide column is sleeved with a reset spring for pushing the sliding part to reset.

[0016] In the present invention, the pushing block cancels the pushing of the extrusion block, and the return spring on the guide column pushes the extrusion block away from the annular surface, thereby ensuring smooth separation between the synchronous lock ring and the gear ring.

[0017] Preferably, an insertion groove is provided on the inner wall of the reset cavity along the height direction, and insertion blocks for deeply inserting into the groove are detachably provided at both ends of the guide column.

[0018] In the present invention, the inserting block is inserted deeply into the slot, and then the extruding block is placed into the pressing cavity, thereby achieving sliding matching between the guide column and the sliding part.

[0019] Preferably, an inclined surface is formed at the end of the outer wall of the extrusion block, and a matching surface for matching with the inclined surface is formed at the end of the push block.

[0020] In the present invention, the matching surface and the inclined surface slide in cooperation, which can ensure the smoothness of the extrusion sliding of the pushing block on the extrusion block and improve the extrusion stability of the pushing block on the extrusion block.

[0021] Preferably, a disassembly groove is provided at one end of the outer wall of the extrusion block away from the inclined surface, and a replacement block for contacting the annular surface is engaged in the disassembly groove.

[0022] In the present invention, the replacement block is clamped in the disassembly groove, and when the replacement block is worn, it can be directly replaced, thereby reducing maintenance costs.

[0023] Preferably, the replacement block has a curved friction portion that fits the surface of the annular surface.

[0024] In the present invention, the curved friction portion can fit with the surface of the annular surface, thereby increasing the friction force between the curved friction portion and the annular surface and ensuring the uniformity and stability of the friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the device body in Example 1; Figure 2 is a schematic diagram of a side cross-section of the gear ring in Example 1; Figure 3 For Example 1 Figure 2 A schematic diagram of the structure enlargement in the middle; Figure 4 is a schematic diagram of a synchronous lock ring in Example 1; Figure 5 is a schematic diagram of the friction member in Example 1; Figure 6 is a schematic diagram of the sealing plate in Example 1; Figure 7 is a schematic diagram of the installation shell in Example 1; Figure 8 For Example 1 Figure 8 A magnified schematic diagram of the structure at B in the middle; Fig. 9 This is a schematic diagram of the extrusion block in Example 1. DETAILED DESCRIPTION

[0026] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0027] Example 1 like Figure 1-2As shown, this embodiment provides an impact-resistant synchronizer, which includes a device body 100, and the device body 100 includes a spline roller 130, and the spline roller 130 is provided with a synchronization main frame 110 for shifting and a ring gear 120 sleeved on the spline roller 130 for cooperating with the synchronization main frame 110; the synchronization main frame 110 is provided with a synchronization lock ring 140, and the synchronization lock ring 140 has an inner conical surface 310 for cooperating with the ring gear 120, and the inner conical surface 310 is detachably provided with a friction member 210 for friction contact with the ring gear 120.

[0028] The present application discloses an impact-resistant synchronizer. During the gear shifting process, the friction member 210 on the synchronous lock ring 140 will come into friction contact with the ring gear 120, thereby synchronizing the rotation speeds of the synchronous lock ring 140 and the ring gear 120. The friction member 210 can replace the synchronous lock ring 140 in contact with the ring gear 120. When the device has been used for a long time, only the friction member 210 needs to be replaced. Compared with the prior art, the present application uses a detachable friction member 210 to rub against the ring gear 120, which is convenient for subsequent replacement, avoids replacing the entire ring gear 120, and reduces maintenance costs. At the same time, during manufacturing, only the wear resistance of the friction member 210 needs to be considered, and the entire components of the ring gear 120 can be produced using other lower-cost materials, which can not only ensure the overall wear resistance of the ring gear 120, but also adjust the overall cost of the device according to actual usage.

[0029] Supplementary explanation: The other functions of the synchronous main frame 110 are the same as those of the existing inertial synchronizer, which belongs to the prior art. The focus of this application is not on this, so no further elaboration is given here.

[0030] Combination Figure 1-7 As shown, in this embodiment, a mounting cavity 320 is provided along the axis line at the inner conical surface 310, and the friction member 210 includes a mounting shell 330 detachably arranged in the mounting cavity 320, a docking portion 610 is formed in the mounting cavity 320, and a mating hole 710 for mating with the docking portion 610 is provided on the outer wall of the mounting shell 330; the gear ring 120 has an outer conical surface 390 corresponding to the friction member 210, and the outer conical surface 390 is axially formed with an annular surface 340 on one side of the friction member 210, and a plurality of pressing cavities 350 are formed in the mounting shell 330, and extrusion blocks 360 for extruding the annular surface 340 can be slidably arranged in the plurality of pressing cavities 350.

[0031] Through the above structure, when installing the friction member 210, the mounting shell 330 is placed in the mounting cavity 320, the matching hole 710 is aligned with the docking portion 610, and the mounting shell 330 is fixed in the mounting cavity 320 by driving bolts, so as to realize the detachable connection between the friction member 210 and the synchronous locking ring 140; at the same time, the synchronous locking ring 140 is pushed toward the ring gear 120, and the annular surface 340 on the ring gear 120 will penetrate into the annular surface 340 of the mounting shell 330, and the extrusion block 360 in the pressing cavity 350 will squeeze the inner annular surface, thereby further improving the overall friction between the synchronous locking ring 140 and the ring gear 120, and accelerating the synchronization effect.

[0032] Combination Figure 2-7 As shown, in this embodiment, the outer wall of the mounting shell 330 is located opposite to the mounting cavity 320 and is provided with a sealing plate 620 for sealing the pressing cavity 350. A connecting groove 630 connected to the pressing cavity 350 is penetrated through the outer wall of the sealing plate 620, and a pushing block 370 for penetrating into the pressing cavity 350 and squeezing the extrusion block 360 is slidably provided in the connecting groove 630; an annular plate 380 for frictionally contacting with the outer conical surface 390 and pushing the pushing block 370 is detachably provided at one end of the outer wall of the pushing block 370 away from the extrusion block 360.

[0033] Through the above structure, when the synchronous locking ring 140 moves toward the ring gear 120, the outer conical surface 390 on the ring gear 120 will push the pushing block 370 sliding in the connecting groove 630, so that the pushing block 370 pushes the extrusion block 360 to rub against the annular surface 340; at the same time, the end of the pushing block 370 is detachably provided with an annular plate 380 that can rub against the outer conical surface 390, thereby increasing the friction force between the synchronous locking ring 140 and the ring gear 120, and further improving the synchronization efficiency.

[0034] Combination Figure 3-8 As shown, in this embodiment, reset chambers 810 are opened on both sides of the pressing chamber 350, and the extrusion block 360 has a sliding portion 820 for sliding in the reset chamber 810. The inner wall of the reset chamber 810 is detachably provided with a guide column 830 slidably connected to the sliding portion 820, and the outer wall of the guide column 830 is sleeved with a reset spring 840 for pushing the sliding portion 820 to reset; the inner wall of the reset chamber 810 is opened with an insertion groove 850 along the height direction, and both ends of the guide column 830 are detachably provided with an insertion block 860 for deeply inserting into the groove 850.

[0035] Through the above structure, when the synchronous locking ring 140 and the gear ring 120 move away from each other, the annular plate 380 can be separated from the outer conical surface 390, and the pushing block 370 cancels the pushing of the extrusion block 360, and the return spring 840 on the guide column 830 will push the extrusion block 360 away from the annular surface 340, thereby ensuring that the synchronous locking ring 140 and the gear ring 120 are smoothly separated; at the same time, when the guide column 830 is installed, the return spring 840 can be pre-mounted on the outer wall of the guide column 830, and the insertion block 860 can be deeply inserted into the groove 850, and then the extrusion block 360 can be placed in the pressing cavity 350, thereby realizing the sliding cooperation between the guide column 830 and the sliding part 820.

[0036] Combination Figure 3-9 As shown, in this embodiment, an inclined surface 910 is formed at the end of the outer wall of the extrusion block 360, and a mating surface 920 for mating with the inclined surface 910 is formed at the end of the pushing block 370; a disassembly groove 930 is formed at one end of the outer wall of the extrusion block 360 away from the inclined surface 910, and a replacement block 940 for contacting the annular surface 340 is engaged at the disassembly groove 930; the replacement block 940 has a curved friction portion 950 that fits with the surface of the annular surface 340.

[0037] Through the above structure, the matching surface 920 and the inclined surface 910 slide in cooperation, which can ensure the smoothness of the sliding of the pushing block 370 on the extrusion block 360 and improve the stability of the extrusion of the pushing block 370 on the extrusion block 360; at the same time, the replacement block 940 is snap-fitted in the disassembly groove 930. When the replacement block 940 is worn, it can be directly replaced to reduce maintenance costs; in addition, the curved friction part 950 can fit with the surface of the annular surface 340, thereby increasing the friction between the curved friction part 950 and the annular surface 340 and ensuring the uniformity and stability of the friction.

[0038] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on one or several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0039] The present invention and its implementation methods are described schematically above, and the description is not restrictive. The embodiments shown in the embodiments are only part of the implementation methods of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the embodiments and designs a structure and an implementation method similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. An impact-resistant synchronizer, comprising a device body (100), the device body (100) comprising a spline roller (130), a synchronization main frame (110) for shifting gears being provided at the spline roller (130), and a gear ring (120) sleeved on the spline roller (130) for cooperating with the synchronization main frame (110); A synchronous locking ring (140) is provided at the synchronous main frame (110), the synchronous locking ring (140) having an inner conical surface (310) for cooperating with the gear ring (120), and a friction piece (210) for frictionally contacting the gear ring (120) is detachably provided at the inner conical surface (310).

2. An anti-shock synchronizer according to claim 1, wherein: An installation cavity (320) is provided along the axis of the inner conical surface (310), and the friction member (210) comprises an installation shell (330) detachably arranged in the installation cavity (320), a docking portion (610) is formed in the installation cavity (320), and a matching hole (710) for matching with the docking portion (610) is provided on the outer wall of the installation shell (330).

3. An anti-shock synchronizer according to claim 1, wherein: The gear ring (120) has an outer conical surface (390) corresponding to the friction member (210); the outer conical surface (390) is located on one side of the friction member (210) and axially forms an annular surface (340); a plurality of pressing cavities (350) are formed in the mounting shell (330); and extrusion blocks (360) for extruding the annular surface (340) are slidably arranged in the plurality of pressing cavities (350).

4. An anti-shock synchronizer according to claim 3, wherein: The outer wall of the mounting shell (330) is provided with a sealing plate (620) for sealing the pressing cavity (350) on the opposite side of the mounting cavity (320); a connecting groove (630) communicating with the pressing cavity (350) is provided through the outer wall of the sealing plate (620); a pushing block (370) for penetrating into the pressing cavity (350) and squeezing the squeezing block (360) is slidably provided in the connecting groove (630).

5. An anti-shock synchronizer according to claim 4, wherein: An annular plate (380) is detachably provided at one end of the outer wall of the pushing block (370) away from the extruding block (360) and is used for frictionally contacting the outer conical surface (390) and pushing the pushing block (370).

6. An anti-shock synchronizer according to claim 4, wherein: Reset cavities (810) are provided on both sides of the pressing cavity (350); the extrusion block (360) has a sliding portion (820) for sliding in the reset cavity (810); a guide column (830) slidably connected to the sliding portion (820) is detachably provided on the inner wall of the reset cavity (810); and a reset spring (840) for pushing the sliding portion (820) to reset is sleeved on the outer wall of the guide column (830).

7. An anti-shock synchronizer according to claim 6, wherein: An insertion groove (850) is provided on the inner wall of the reset cavity (810) along the height direction, and insertion blocks (860) for deeply inserting into the groove (850) are detachably provided at both ends of the guide column (830).

8. An anti-shock synchronizer according to claim 7, wherein: An inclined surface (910) is formed at the end of the outer wall of the extrusion block (360), and a matching surface (920) for matching with the inclined surface (910) is formed at the end of the push block (370).

9. An anti-shock synchronizer according to claim 8, wherein: A disassembly groove (930) is provided at one end of the outer wall of the extrusion block (360) away from the inclined surface (910), and a replacement block (940) for contacting the annular surface (340) is engaged with the disassembly groove (930).

10. An anti-shock synchronizer according to claim 9, wherein: The replacement block (940) has a curved friction portion (950) that fits the surface of the annular surface (340).

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