Overrunning clutch for numerical control lathe

Abstract

The overrun clutch for the numerical control lathe comprises two semicircular covers which are symmetrically distributed, a clutch shell body is fixed in the two semicircular covers through the two semicircular covers, a connecting assembly is arranged on the outer sides of the semicircular covers, and the connecting assembly comprises a first hoop, a second hoop and a third hoop which are sequentially hinged. A locking hook head is arranged on the inner side of the tail end of the third hoop, a containing groove is formed in the first hoop, a locking groove matched with the locking hook head in a clamped mode is formed in the tail end of the containing groove, and the ends of the two semicircular covers are clamped in the upper limiting base and the lower limiting base. The clutch shell mechanism is scientific and reasonable in structural design, the two semicircular covers are arranged to serve as a limiting installation mechanism to install a clutch shell, the two semicircular covers are connected and fixed through the interaction of the first hoop, the second hoop and the third hoop which are matched with each other, the installation positioning effect on the clutch shell mechanism is effectively improved, and the clutch shell mechanism is convenient to install. And the clutch mechanism is convenient to maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to clutch equipment technical field, concretely is the overrunning clutch for numerical control lathe. BACKGROUND

[0002] The mechanical design of the bidirectional overrunning clutch is generally that the driving shaft inputs torque, and both forward and reverse rotation are allowed, and the driven shaft can be driven to rotate; the driven shaft inputs torque, and the driving shaft does not rotate. In the miniaturized design application of the mechanical structure, currently, there are two schemes, such as Chinese patent CN212131117U, published on December 11, 2020, which discloses a novel overrunning clutch assembly, comprising an outer ring gear, an inner ring cam, a middle input shaft input gear device, and a clutch load balancing device. The clutch load balancing device is movably arranged between the inner ring cam and the outer ring gear. The clutch load balancing device comprises a plurality of stable bearing parts arranged on the outer peripheral wall of the inner ring cam, and a plurality of rollers with a diameter of 20 mm arranged between the inner ring cam and the outer ring gear through the corresponding stable bearing parts. The stable bearing parts are step surfaces corresponding to the rollers and arranged on the peripheral wall surface of the inner ring cam. The clutch load balancing device further comprises a self-adaptive buffer balancing assisting device corresponding to the rollers. Although the novel overrunning clutch assembly is stable and reliable in operation, and can bear large and uniform load, the device is heavy because it is made of metal, and it is inconvenient to disassemble and install, which reduces the efficiency of the maintenance of the staff. Therefore, we propose the overrunning clutch for numerical control lathe. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing the overrunning clutch for numerical control lathe to solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: the overrunning clutch for numerical control lathe, comprising two symmetrical half-circular covers, the two half-circular covers fix the clutch shell main part inside, the outside of the half-circular cover is provided with a connecting assembly, the connecting assembly comprises a first hoop, a second hoop and a third hoop which are sequentially hinged, the tail end inside of the third hoop is provided with a locking hook, a containing groove is formed in the first hoop, and a locking groove matched with the locking hook is formed in the tail end of the containing groove, and the ends of the two half-circular covers are clamped inside the upper and lower limit seats.

[0005] In the above-mentioned scheme, the third hoop is clamped in the containing groove.

[0006] In the above-mentioned scheme, the first hoop, the second hoop and the third hoop are elastic metal parts.

[0007] The bottom of the lower limit seat is provided with a supporting base.

[0008] The end of the upper limit seat and the lower limit seat is provided with a connecting groove, and a locking bolt is connected in the connecting groove.

[0009] The upper limit seat is connected with a lubricating pipe, and the other end of the lubricating pipe is connected to the inside of the clutch housing.

[0010] The semicircular cover is provided with a heat dissipation hole.

[0011] Compared with the prior art, the number control lathe overrunning clutch has the advantages that the structure is simple and reasonable, and has strong practicability, the clutch housing is installed by the two semicircular covers as the limiting installation mechanism, the two semicircular covers are connected and fixed by the first, second and third hoops, the installation and positioning effect of the clutch housing mechanism is effectively improved, the structure is detachably connected, the clutch mechanism is convenient to maintain, the clutch mechanism is further supported and fixed by the upper and lower limit seats, the purpose of convenient disassembly, replacement and maintenance is achieved by the cooperation of the connecting groove and the locking bolt, the use cost is reduced, and the problem of inconvenient disassembly and maintenance of the ordinary overrunning clutch mechanism is solved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a side surface structure schematic view of the utility model.

[0013] Fig. 2 It is a hoop connecting structure schematic view of the utility model.

[0014] Fig. 3 It is a structure schematic view of the utility model.

[0015] In the drawing: 1, clutch housing 11, semicircular cover 12, first hoop 13, second hoop 14, third hoop 15, locking hook 16, accommodating groove 17, locking groove 18, upper limit seat 19, lower limit seat 2, supporting base 21, connecting groove 22, locking bolt 23, lubricating pipe. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0017] Please refer to Figs. 1-3 The utility model provides technical scheme: overrunning clutch for numerical control lathe, two half cover 11 of symmetry distribution two half cover 11 will clutch housing 1 main body fixed in its inside, the outside of half cover 11 is provided with connecting assembly, the connecting assembly includes first hoop 12, second hoop 13 and third hoop 14 that are hingedly connected in proper order, the inner side of tail end of third hoop 14 is provided with locking hook 15, is set with the locking groove 17 that is matched with the clamping of locking hook 15 in the tail end of accommodating groove 16 that is set up on first hoop 12, and the end of two half cover 11 is clamped in the inside of upper limit seat 18 and lower limit seat 19.

[0018] The main body of the clutch housing 1 is fixed by two symmetrical half cover 11, and the half cover is detachably connected through the external connecting assembly. The connecting assembly includes first hoop 12, second hoop 13 and third hoop 14, which form a chain structure through hinged connection. The inner side of the tail end of the third hoop 14 is provided with a locking hook 15, which is clamped with the locking groove 17 of the first hoop 12 to form a closed ring-shaped fixed structure.

[0019] The ends of the half cover 11 are respectively embedded in the internal clamping slots of the upper limit seat 18 and the lower limit seat 19, and are further fastened in the connecting groove 21 by the locking bolt 22. The bottom of the lower limit seat 19 is provided with a support base 2 for stable support of the overall mechanism.

[0020] The lubricating pipe 23 is connected to the upper limit seat 18, and the end thereof extends into the interior of the clutch housing 1, facilitating the injection of lubricant. The heat dissipation holes, such as arrayed small holes, provided on the surface of the half cover 11 can accelerate heat dissipation and reduce the temperature rise of the friction pair.

[0021] The first hoop, the second hoop and the third hoop are made of elastic metal material such as spring steel, which utilizes the elastic deformation capability to realize the quick clamping and unlocking of the locking hook and the locking groove, and at the same time, adapts to different installation angle requirements.

[0022] The mating surface of the half cover 11 and the clutch housing 1 is designed as a high-precision inner cavity, which ensures the coaxiality of the transmission shaft and reduces the vibration and wear caused by eccentricity.

[0023] In the above scheme, the third hoop 14 is clamped in the accommodating groove 16. The tail end of the third hoop 14 is clamped with the locking groove 17 of the first hoop 12 through the locking hook 15 to form a closed ring structure. Specifically:

[0024] The locking hook 15 of the third hoop 14 is designed as an inverted hook, the size of which matches the opening of the locking groove 17, and the "clamping-locking" action is realized through elastic deformation.

[0025] When the third clamp 14 slides to the end along the accommodating groove 16, the locking hook 15 is automatically popped into the locking groove 17 after being extruded and deformed, completing self-locking and avoiding accidental loosening of the clamp chain.

[0026] The clamping structure can be quickly disassembled without additional tools, significantly improving maintenance efficiency; at the same time, the accommodating groove 16 limits the sliding track of the third clamp 14, ensuring the accuracy and reliability of the locking process.

[0027] In the above scheme, the first clamp 12, the second clamp 13 and the third clamp 14 are elastic metal parts. The clamps are made of elastic metal materials such as 65Mn spring steel or 304 stainless steel, and the specific advantages include:

[0028] The clamp chain can adapt to half-round covers 11 of different diameters through elastic deformation during installation, allowing a certain range of size tolerance and reducing the processing precision requirement.

[0029] The elastic metal parts are not easy to be plastically deformed during repeated disassembly and assembly, ensuring the long-term stability of the locking force; at the same time, the surface of the material can be galvanized or blackened to improve corrosion resistance.

[0030] Compared with rigid materials, the elastic clamp can release stress through deformation when overloaded, avoiding damage to the half-round cover 11 or the clutch housing 1 caused by excessive locking force.

[0031] In the above scheme, the bottom of the lower limit seat 19 is provided with a support base 2. The support base 2 can be a cast or welded metal plate, and the bottom thereof is provided with mounting holes such as bolt holes or positioning pin holes for connection with the lathe bed or other fixed structures. The inside of the support base 2 can be provided with shock-absorbing pads such as rubber pads or polyurethane pads to absorb vibration during high-speed operation of the clutch, reduce noise and prolong the service life of the bearing.

[0032] The wide bottom surface of the support base 2 uniformly transmits the weight and working load of the clutch to the lathe bed, avoiding deformation caused by local stress concentration.

[0033] In the above scheme, the end of the upper limit seat 18 and the lower limit seat 19 is provided with a connecting groove 21, and the connecting groove 21 is connected with a locking bolt 22. The connecting groove 21 is a T-shaped groove or a dovetail groove structure, which matches the shape of the head of the locking bolt 22 to prevent the bolt from rotating and shifting when tightened. The length direction of the connecting groove 21 is reserved with an adjustment allowance, allowing the half-round cover 11 to adjust the installation angle within a certain range to adapt to the space layout requirements of different lathes.

[0034] In the above scheme, the upper limit seat 18 is connected with a lubricating pipe 23, and the other end of the lubricating pipe 23 is connected to the inside of the clutch housing 1. The lubricating pipe 23 is made of copper pipe or nylon hose, and the end thereof extends to the roller or wedge friction pair area inside the clutch housing 1 to directly spray lithium grease, thereby reducing the waste of lubricant. The inlet end of the lubricating pipe 23 can be provided with a quick connector such as a male and female connector, which is convenient to connect with an external oil injection gun to realize non-stop supplement of lubrication.

[0035] In the above scheme, the semicircular cover 11 is provided with a heat dissipation hole. The heat dissipation hole is a circular hole or a long strip-shaped hole with a diameter of 3-5 mm, which is uniformly distributed along the circumference of the semicircular cover 11 to form a convection channel to accelerate the internal heat dissipation through air flow. The total area of the heat dissipation hole accounts for 15%-20% of the surface area of the semicircular cover 11, which maximizes the heat dissipation area under the premise of ensuring the structural strength; and the hole edge is chamfered to reduce stress concentration.

[0036] The inside of the heat dissipation hole can be covered with a metal filter screen such as a stainless steel punched screen with a hole diameter less than 0.5 mm to prevent cutting chips or dust from entering the clutch to cause wear.

[0037] Through the modular design (such as the hoop chain, the detachable limit seat), the elastic locking mechanism (elastic metal part + clamping structure) and the auxiliary function integration (lubricating pipe + heat dissipation hole), the scheme improves the installation stability of the clutch, solves the pain points of the traditional clutch such as difficult maintenance and poor heat dissipation, and meets the working condition requirements of high precision and high efficiency of the numerical control lathe.

[0038] Working principle:

[0039] The overrunning clutch for the numerical control lathe can release the clamping of the locking hook 15 of the third hoop 14 and the locking groove 17 by pressing the locking hook 15, and the elastic hoop chain is unfolded to separate the semicircular cover 11, so that the internal structure of the clutch housing 1 is exposed, and the wear parts or the lubricating grease can be replaced or cleaned. The lubricating pipe 23 can directly guide the lubricating oil to the contact area of the friction pair to reduce wear; and the heat dissipation hole reduces the internal temperature rise through air convection to prolong the service life of the clutch. The upper limit seat 18 and the lower limit seat 19 fix the semicircular cover through the locking bolt 22 to prevent axial displacement; the supporting base 2 further disperses the load, which is suitable for high speed and high torque working conditions, the combination of the semicircular cover and the hoop chain realizes the modular installation of the clutch, and the maintenance complexity is significantly reduced,

[0040] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. Overrunning clutch for a numerical control lathe, comprising two half-circular casings (11) distributed symmetrically, characterised in that: Two half-circular covers (11) fix the clutch housing (1) body inside, the outer side of the half-circular cover (11) is provided with a connecting assembly, the connecting assembly comprises a first hoop (12), a second hoop (13) and a third hoop (14) hinged in sequence, the tail end inner side of the third hoop (14) is provided with a locking hook (15), the first hoop (12) is provided with a containing groove (16), and the tail end of the containing groove (16) is provided with a locking groove (17) matched with the locking hook (15), and the end of the two half-circular covers (11) is clamped inside the upper limiting seat (18) and the lower limiting seat (19).

2. The super-torque clutch for a CNC lathe according to claim 1, wherein: The third hoop (14) is clamped in the containing groove (16).

3. The super-torque clutch for a CNC lathe according to claim 1, wherein: The first hoop (12), the second hoop (13) and the third hoop (14) are elastic metal pieces.

4. The super-torque clutch for a CNC lathe according to claim 1, wherein: The bottom of the lower limiting seat (19) is provided with a supporting base (2).

5. The super-torque clutch for a CNC lathe according to claim 1, wherein: The end of the upper limiting seat (18) and the lower limiting seat (19) is provided with a connecting groove (21), and the connecting groove (21) is connected with a locking bolt (22).

6. The super-torque clutch for a CNC lathe according to claim 1, wherein: The upper limiting seat (18) is connected with a lubricating pipe (23), and the other end of the lubricating pipe (23) is connected to the inside of the clutch housing (1).

7. The super-torque clutch for a CNC lathe according to claim 1, wherein: The half-circular cover (11) is provided with a heat dissipation hole.

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