CN220591794U

CN220591794U - Special fixture for hot pre-machining of planetary and half-shaft gears

Info

Publication number: CN220591794U
Application number: CN202322326246.5U
Authority: CN
Inventors: 崔志亮
Original assignee: Sichuan Zhongyou Machinery Co ltd
Current assignee: Sichuan Zhongyou Machinery Co ltd
Priority date: 2023-08-29
Filing date: 2023-08-29
Publication date: 2024-03-15
Anticipated expiration: 2033-08-29

Abstract

The utility model belongs to the field of gear machining, and particularly relates to a special fixture for hot pre-machining of a planetary and half-shaft gear, which comprises a cylinder, a main shaft, clamping jaws and a base; the cylinder body is internally provided with a cavity, one end of the cylinder body is slidably connected with a main shaft, one end of the main shaft is positioned in the cavity, the other end of the main shaft is used for being connected with a driving device, the other end of the cylinder body is provided with a base, the base is connected with the main shaft, a plurality of clamping jaws are circumferentially arranged on the base and are connected with the main shaft, the base is used for placing gears, when the main shaft moves, the clamping jaws move relatively or separately, so that the function of clamping or loosening the peripheral surface of the gears is realized, and the gears are sent into or separated from the clamping range of the clamping jaws along with the movement of the main shaft by the base; the clamping device can realize clamping and ejection of the gear, is convenient for clamping and loading and unloading, can stably clamp the peripheral surface of the gear, is convenient for end face processing, realizes clamping of the clamping jaw and ejection of the base through one main shaft, and has ingenious whole structural design and lower cost.

Description

Special fixture for hot pre-machining of planetary and half-shaft gears

Technical Field

The utility model belongs to the field of gear machining, and particularly relates to a special fixture for hot pre-machining of planet and half-shaft gears.

Background

The gear heat treatment process flow refers to a series of processes of heating, heat preservation, cooling and the like for the gear so as to improve the physical performance and the mechanical performance of the gear. End face machining, such as drilling, chamfering, etc., is typically performed before heating, requiring special jigs to grip. For planetary gears and half-shaft gears, the conventional special fixture usually clamps the peripheral surface of the gear and then processes the end surface, however, before and after clamping, the gear and clamping jaw are positioned on the same plane, so that feeding and discharging are inconvenient, and tools such as crowbar and knife changing are needed to assist.

Disclosure of Invention

The utility model aims to provide a special fixture for hot pre-machining of planet gears and side gears, which solves the problems in the prior art, and adopts the following technical scheme that:

the planetary and half-shaft gear hot front machining special fixture comprises a cylinder body, a main shaft, clamping jaws and a base; the novel gear clamping device comprises a cylinder body, and is characterized in that a cavity is formed in the cylinder body, one end of the cylinder body is slidably connected with the main shaft, one end of the main shaft is located in the cavity, the other end of the main shaft is used for being connected with a driving device, the other end of the cylinder body is provided with a base, the base is connected with the main shaft, a plurality of clamping jaws are arranged in the circumferential direction of the base, the clamping jaws are connected with the main shaft, the base is used for placing gears, and when the main shaft moves, the clamping jaws move relatively or separately, so that the function of clamping or loosening the peripheral surface of the gears is achieved, and the base moves along with the main shaft to send the gears into or separate from the clamping range of the clamping jaws.

Further, the clamping jaws are respectively connected with the main shaft through a connecting mechanism; the connecting mechanism comprises a revolute pair and a push rod, the clamping jaw is rotatably connected with the push rod through the revolute pair, the revolute pair is arranged on the cylinder body, the push rod is positioned in the cavity, the push rod is connected with the main shaft through a wedge block, and when the main shaft moves, the push rod is driven to rotate through the wedge block, so that the clamping jaw moves.

Further, the connecting mechanism further comprises a ring sleeve, a connecting block, a telescopic rod and a first spring, wherein a waist-shaped hole is formed in the connecting block, one end of the push rod, which is far away from the clamping jaw, is movably connected with the waist-shaped hole, one end of the telescopic rod is fixedly connected with the side face of the connecting block, the other end of the telescopic rod is fixedly connected with the inner wall face of the cylinder body, the first spring is sleeved on the telescopic rod, one side, which is far away from the telescopic rod, of the connecting block is fixedly connected with the wedge block, the ring sleeve is sleeved on the main shaft, a wedge part which is matched with the wedge block is arranged on the ring sleeve, and the wedge part is annular so as to be matched with a plurality of the wedge blocks; when the base ejects the gear, the gear is separated from the clamping range of the clamping jaw, and an axial interval is arranged between the wedge part and the wedge block.

Further, the revolute pair is a spherical hinge mechanism arranged on the cylinder body.

Further, one end of the base is slidably positioned in the cavity and fixedly connected with the limiting rod, and the limiting rod is connected with the main shaft through the second spring.

Furthermore, the limiting rod is a T-shaped rod, the step part of the limiting rod is positioned in the blind hole at the end part of the main shaft, a limiting structure is formed, and the second spring is positioned in the blind hole and sleeved on the limiting rod.

Further, the base is connected with the cylinder body through a sliding key.

Further, a groove body for placing the gear is arranged on the base, a plurality of notch parts are arranged on the peripheral surface of the groove body, the notch parts are matched with the tooth parts of the gear, the tooth parts of the gear are clamped in the notch parts and penetrate out of the notch parts, and the clamping jaw is used for clamping the part of the tooth parts penetrating out of the notch parts.

The utility model has the following beneficial effects: compared with the prior art, the clamping and ejection device can realize the clamping and ejection of the gear, is convenient for clamping and feeding and discharging, can stably clamp the peripheral surface of the gear, is convenient for end face processing, realizes the clamping of the clamping jaw and the ejection of the base through one main shaft, and has ingenious whole structural design and lower cost.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is an enlarged partial schematic view of the mating relationship of the base and the gear;

FIG. 3 is a schematic diagram of a base during ejection;

fig. 4 is a schematic view of the jaw gripping the gear.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1 to 4 in the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. The technical means used in the examples are conventional means well known to those skilled in the art unless otherwise indicated.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

As shown in fig. 1 and 2, the planetary and side gear hot pre-machining special fixture comprises a cylinder body 1, a main shaft 2, clamping jaws 3 and a base 5; the novel gear clamping device is characterized in that a cavity is formed in the barrel body 1, one end of the barrel body 1 is slidably connected with the main shaft 2, one end of the main shaft 2 is located in the cavity, the other end of the main shaft 2 is used for being connected with a driving device, the other end of the barrel body 1 is provided with the base 5, the base 5 is connected with the main shaft 2, a plurality of clamping jaws 3 are circumferentially arranged on the base 5, the clamping jaws 3 are connected with the main shaft 2, the base 5 is used for placing a gear 6, when the main shaft 2 moves, the clamping jaws 3 move relatively or separately, so that the function of clamping or loosening the peripheral surface of the gear 6 is achieved, and the base 5 moves along with the main shaft 2 to feed the gear 6 into or separate from the clamping range of the clamping jaws 3.

The cylinder 1 is preferably a cylindrical structure with a hollow interior, and may be a square structure. The main shaft 2 is coaxial with the cylinder 1. The driving device is a driving component for realizing the linear reciprocating motion of the main shaft 2 in the prior art, such as a cylinder, an electric cylinder, a hydraulic rod and the like. The gear 6 is a prior art planetary or side gear, preferably a conical gear, with its conical surface facing downwards on the base 5. The holding range of the holding jaw 3 is an inner space formed by a plurality of holding jaws 3.

In the specific implementation, the gear 6 is firstly placed on the base 5, and then the driving device is started to drive the main shaft 2 to linearly move. During the clamping phase, the drive device is retracted, the spindle 2 moves inwards, and when the base 5 moves to the maximum stroke, the peripheral surface of the gear 6 is just inside the plurality of clamping jaws 3. At this time, the plurality of gripping claws 3 simultaneously move inward to grip the peripheral surface of the gear 6, so that the gear 6 can be subjected to an end face work such as drilling. In the ejection phase, the driving device is extended, the main shaft 2 moves outwards, and at the moment, the clamping jaws 3 simultaneously move outwards, and the clamping jaws 3 loosen the gear 6. Then the base 5 ejects the gear 6 out of the clamping range of the clamping jaw 3, so that feeding and discharging are facilitated. Compared with the prior art, the clamping and ejection device can realize the clamping and ejection of the gear 6, is convenient for clamping and feeding and discharging, can stably clamp the peripheral surface of the gear 6, is convenient for end face machining, realizes the clamping of the clamping jaw 3 and the ejection of the base 5 through one main shaft 2, and has ingenious whole structural design and lower cost.

Further, the clamping jaws 3 are respectively connected with the main shaft 2 through a connecting mechanism; the connecting mechanism comprises a revolute pair 401 and a push rod 7, the clamping jaw 3 is rotatably connected with the push rod 7 through the revolute pair 401, the revolute pair 401 is arranged on the cylinder body 1, the push rod 7 is located in a cavity, the push rod 7 is connected with the main shaft 2 through a wedge block 801, and when the main shaft 2 moves, the wedge block 801 drives the push rod 7 to rotate, so that the clamping jaw 3 moves. During the clamping phase, the spindle 2 rotates the push rod 7 via the wedge 801, so that the clamping jaw 3 performs the clamping function.

Further, the connecting mechanism further comprises a ring sleeve 201, a connecting block 8, a telescopic rod 803 and a first spring 802, a waist-shaped hole is formed in the connecting block 8, one end of the push rod 7, far away from the clamping jaw 3, is movably connected with the waist-shaped hole, one end of the telescopic rod 803 is fixedly connected with the side face of the connecting block 8, the other end of the telescopic rod is fixedly connected with the inner wall face of the cylinder body 1, the first spring 802 is sleeved on the telescopic rod 803, one side, far away from the telescopic rod 803, of the connecting block 8 is fixedly connected with the wedge-shaped block 801, the ring sleeve 201 is sleeved on the main shaft 2, a wedge-shaped part matched with the wedge-shaped block 801 is arranged on the ring sleeve 201, and the wedge-shaped part is annular so as to be matched with a plurality of the wedge-shaped blocks 801; when the base 5 ejects the gear 6, the gear 6 is disengaged from the grip range of the jaw 3 and there is an axial spacing between the wedge and the wedge block 801.

The purpose of the waist-shaped hole on the connecting block 8 is to provide the freedom degree when the push rod 7 rotates, and the bottom of the push rod 7 can be movably connected with the waist-shaped hole through a bolt, a sliding block and other components, and can slide and rotate. The telescopic link 803 level sets up, and connecting block 8 is vertical to be set up, and waist type hole is vertical to be distributed. The wedge 801 has a narrow upper end and a wide lower end, and the wedge is adapted to be wider at the upper end and narrower at the lower end. The purpose of the first spring 802 is to return the telescopic rod 803, bringing the wedge 801 into close contact with the outside of the collar 201, thus resetting the jaw 3.

Further, the revolute pair 401 is a spherical hinge mechanism mounted on the cylinder 1. The spherical hinge mechanism is the prior art, specifically includes spherical shell and spheroid, and the spherical shell is fixed on the apron at barrel 1 top, and spherical shell top fixed connection transition piece 4, clamping jaw 3 are fixed on transition piece 4. The opening of the spherical shell faces downwards, the sphere is rotatably positioned in the spherical shell, and a part of the bottom of the sphere extends out of the opening of the spherical shell and is fixedly connected with the top of the push rod 7.

Further, one end of the base 5 is slidably located in the cavity and is fixedly connected with a limiting rod 502, and the limiting rod 502 is connected with the main shaft 2 through a second spring 503.

Further, the stop lever 502 is a T-shaped lever, the stepped portion thereof is located in the blind hole at the end of the spindle 2, and forms a stop structure, and the second spring 503 is located in the blind hole and sleeved on the stop lever 502. The top of the blind hole can be provided with a fixing plate for the rod part of the limiting rod 502 to pass through, and the fixing plate and the blind hole jointly form a limiting structure for the large-diameter end of the limiting rod 502.

The purpose of the second spring 503 is to allow the spindle 2 and the base 5 to slide relatively during the movement of the spindle 2, so that the base 5 is brought into position first and then the clamping jaw 3 is clamped during the clamping phase. In the ejection stage, the clamping jaw 3 is firstly loosened, and then the base 5 is ejected. The clamping and ejection processes of the whole clamp are more reasonable, and the gear 6 is prevented from being damaged by rigidity.

Further, the base 5 is connected to the cylinder 1 through a sliding key 504. The purpose of the slide key 504 is to constrain the movement of the base 5 and, during the clamping phase, the slide key 504 slides the base 5 to a maximum downward travel, which then positions the base 5.

Further, a groove body for placing the gear 6 is formed in the base 5, a plurality of notch portions 501 are formed in the peripheral surface of the groove body, the notch portions 501 are matched with the tooth portions of the gear 6, the tooth portions of the gear 6 are clamped in the notch portions 501 and penetrate out of the notch portions 501, and the clamping jaw 3 is used for clamping portions of the tooth portions penetrating out of the notch portions 501. The notch 501 on the slot body makes the end surface of the slot body form a tooth slot structure for embedding the gear 6, and forms circumferential constraint on the gear 6. The axial restraint of the gear wheel 6 is achieved by the clamping of the clamping jaw 3.

As shown in fig. 3, the spindle 2 and the base 5 are at the maximum stroke upwards, the wedge 801 abuts against the outer side of the collar 201, and the wedge 801 is located below the wedge. During the clamping phase, the spindle 2 moves downwards, the second spring 503 being compressed, thereby moving the base 5 downwards. The downward movement of the base 5 moves the gear 6 to the gripping range of the jaw 3. At this time, the sliding key 504 on the base 5 is at the maximum downward stroke, so as to lock the base 5. When the gear 6 is in place, the spindle 2 then moves downward, the second spring 503 is further compressed, the wedge 801 is in contact with the wedge, the wedge 801 is pushed outward by the wedge, the telescopic rod 803 and the first spring 802 are shortened, and then the lower part of the push rod 7 deflects outward, so that the plurality of clamping jaws 3 simultaneously move inward to clamp the peripheral surface of the gear 6. The clamped state of fig. 4 is formed. During the ejection phase, the wedge 801 is disengaged from the wedge, so that the jaw 3 releases the gear 6, and during this process, the base 5 is not understood, subject to the constraint of the second spring 503. When the clamping jaw 3 releases the gear 6, the limiting rod 502 abuts against the bottom end face of the blind hole, so that the main shaft 2 ejects the limiting rod 502 and the base 5 to form the state of fig. 3.

The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications, variations, alterations, substitutions made by those skilled in the art to the technical solution of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the spirit of the design of the present utility model.

Claims

1. Planetary and semi-axis gear hot front machining special fixture, its characterized in that: comprises a cylinder body (1), a main shaft (2), clamping jaws (3) and a base (5);

set up the cavity in barrel (1), the one end slidable of barrel (1) is connected main shaft (2), the one end of main shaft (2) is located the cavity, and its other one end is used for connecting drive arrangement, the other one end of barrel (1) sets up base (5), base (5) with main shaft (2) link to each other, the hoop of base (5) sets up a plurality of clamping jaw (3), clamping jaw (3) are connected main shaft (2), be used for placing gear (6) on base (5), during main shaft (2) motion, a plurality of clamping jaw (3) are relative or are separated the motion to realize centre gripping or loosen the function of gear (6) global, and base (5) are along with main shaft (2) motion, send into or break away from the centre gripping scope of gear (6).

2. The planetary and side gear hot pre-machining specialty fixture of claim 1, wherein: the clamping jaws (3) are respectively connected with the main shaft (2) through a connecting mechanism; coupling mechanism includes revolute pair (401) and push rod (7), clamping jaw (3) pass through revolute pair (401) rotatable connection push rod (7), revolute pair (401) set up on barrel (1), push rod (7) are located the cavity, push rod (7) are connected through wedge (801) main shaft (2), works as when main shaft (2) move, pass through wedge (801) drive push rod (7) rotate to make clamping jaw (3) motion.

3. The planetary and side gear hot pre-machining specialty fixture of claim 2, wherein: the connecting mechanism further comprises a ring sleeve (201), a connecting block (8), a telescopic rod (803) and a first spring (802), wherein a waist-shaped hole is formed in the connecting block (8), one end of the push rod (7) away from the clamping jaw (3) is movably connected with the waist-shaped hole, one end of the telescopic rod (803) is fixedly connected with the side face of the connecting block (8), the other end of the telescopic rod is fixedly connected with the inner wall face of the cylinder body (1), the first spring (802) is sleeved on the telescopic rod (803), one side of the connecting block (8) away from the telescopic rod (803) is fixedly connected with the wedge block (801), the ring sleeve (201) is sleeved on the main shaft (2), and a wedge part matched with the wedge block (801) is arranged on the ring sleeve (201) and is annular so as to be matched with the wedge blocks (801);

when the base (5) ejects the gear (6), the gear (6) is separated from the clamping range of the clamping jaw (3), and an axial interval is arranged between the wedge part and the wedge block (801).

4. The planetary and side gear hot pre-machining specialty fixture of claim 2, wherein: the revolute pair (401) is a spherical hinge mechanism arranged on the cylinder body (1).

5. The planetary and side gear hot pre-machining specialty fixture of claim 1, wherein: one end of the base (5) is slidably positioned in the cavity and is fixedly connected with a limiting rod (502), and the limiting rod (502) is connected with the main shaft (2) through a second spring (503).

6. The planetary and side gear hot pre-machining specialty fixture of claim 5, wherein: the limiting rod (502) is a T-shaped rod, the step part of the limiting rod is positioned in a blind hole at the end part of the main shaft (2) and forms a limiting structure, and the second spring (503) is positioned in the blind hole and sleeved on the limiting rod (502).

7. The planetary and side gear hot pre-machining specialty fixture of claim 5, wherein: the base (5) is connected with the cylinder body (1) through a sliding key (504).

8. The planetary and side gear hot pre-machining specialty fixture of claim 1, wherein: the base (5) is provided with a groove body used for placing the gear (6), the peripheral surface of the groove body is provided with a plurality of notch parts (501), the notch parts (501) are matched with the tooth parts of the gear (6), the tooth parts of the gear (6) are clamped in the notch parts (501) and penetrate out of the notch parts (501), and the clamping jaw (3) is used for clamping the part of the tooth parts penetrating out of the notch parts (501).