Handheld ball cage sealing cover expander

Abstract

The utility model discloses a handheld ball cage sealing cover expander which is used for installing a straight channel type ball cage transmission shaft sealing cover. One end of the supporting rod is embedded into equally-divided grooves in the sliding sleeve, the inner side of the middle of the supporting rod is sleeved on an outer ring of the fixing ring, two ends of a rib of the fixing ring are respectively fixed with an inner ring and the outer ring of the fixing ring, the spring is sleeved on the inner ring of the fixing ring, and two ends of the spring respectively abut against a shaft shoulder of the inner ring of the fixing ring and the end face of the sliding sleeve. The shaft check ring is clamped on the inner ring of the fixing ring to axially limit the sliding sleeve, the pin rod penetrates through a hole in the end of the inner ring of the fixing ring, the pin rod and the inner ring of the fixing ring are fixed through the compression screw, and the pin rod is located in the bent handle hand ring on the sliding sleeve. The ball cage sealing cover assembling tool is simple and light in structure and capable of being held by hand for operation, an expander can be easily inserted into a ball cage sealing cover cavity to be assembled without an air source in the ball cage sealing cover assembling process, the expander can be conveniently taken down after assembling is completed, assembling is stable and reliable, and the ball cage sealing cover assembling efficiency and quality are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball cage transmission shaft manufacturing technical field, specifically a hand -held ball cage seal cover expander for installing straight channel type ball cage transmission shaft seal cover. BACKGROUND

[0002] Ball cage transmission shaft mostly needs to use rubber seal cover to carry out dustproof and seal, and the ball cage transmission shaft of various types needs to utilize the elasticity of rubber to expand the seal cover to a certain extent, to be installed to the required part. The conventional straight channel type ball cage transmission shaft needs to turn over the seal cover in the manufacturing process, and the seal cover is fixed to the shaft diameter with thin outer diameter on the larger spherical surface of the ball cage shaft. At present, the operation method of the operator is to place the ball cage shaft vertically, to cover a layer of plastic bag on the spherical surface, then to brush oil on the spherical surface to reduce the assembly friction, to cover the seal cover on the plastic bag, to hold the seal cover two sides with both hands, to press the seal cover down to open and turn over the spherical surface to complete the installation. This assembly method is not only unsightly and unhygienic, but also very laborious.

[0003] The commercially available pneumatic ball cage cover expander is generally eight-jaw structure, but the commonly used straight channel ball cage transmission shaft is six-channel. The expander on the market is not suitable for the structure, and the seal cover is expanded and then contracted to be sleeved on the eight jaws of the pneumatic ball cage cover expander, the pneumatic ball cage cover expander is not easy to be taken out, and it is also necessary to connect the gas source, which is extremely inconvenient to operate. SUMMARY

[0004] In order to overcome the defects of the prior art, the application aims to provide a hand -held ball cage seal cover expander to realize the purpose of conveniently and quickly installing the seal cover of the straight channel type ball cage transmission shaft.

[0005] In order to achieve the above application purpose, one end of the support rod of the hand -held ball cage seal cover expander is embedded in the equidistant groove on the sliding sleeve, the middle part of the support rod is sleeved on the outer ring of the fixed ring, the two ends of the rib of the fixed ring are fixed with the inner ring and the outer ring of the fixed ring respectively, the spring is sleeved on the inner ring of the fixed ring, the two ends of the spring are tightly pressed on the shaft shoulder of the inner ring of the fixed ring and the end face of the sliding sleeve respectively, the shaft stop washer is clamped on the inner ring of the fixed ring to axially limit the sliding sleeve, the pin rod passes through the hole of the inner ring end of the fixed ring, and the pin rod is fixed with the inner ring of the fixed ring by the pressing screw, and the pin rod is located in the bent handle ring on the sliding sleeve.

[0006] Further, the support rod is six, which is a bird beak structure, and a support hole is drilled in the inner side of the middle part arch of each support rod, the support rod is sleeved on the outer ring of the fixed ring as a fulcrum through the support hole, the bent handle ring on the sliding sleeve is folded with the pin rod, the support rod is pushed to open, and the ball cage seal cover is expanded to the required range under the joint action of the six support rods; the ball cage seal cover is made of rubber material.

[0007] Further, the fixed ring is a steering wheel structure, three equal division ribs fix the inner ring and the outer ring, and the outer ring has three equal division openings for conveniently sleeving the outer ring into the supporting holes on the supporting rods.

[0008] Further, the spring is a conical compression spring, which can support the six supporting rods in radial direction and keep the six supporting rods in synchronous movement.

[0009] Further, the sliding sleeve has six equal division grooves, the width of which is slightly wider than the thickness of the supporting rods, and the ends of the six supporting rods are embedded into the grooves to make the supporting rods uniformly distributed, and the tail of the sliding sleeve is welded with a bent handle ring for conveniently holding.

[0010] Further, the supporting rods and the sliding sleeve are made of aluminum alloy.

[0011] When the expander is not subjected to external force, the spring supports the fixed ring and the sliding sleeve, so that the expander is in a natural contraction state, the shaft stopper limits the sliding sleeve in axial direction and limits the sliding sleeve in a certain telescopic range, in the contraction state of the expander, the supporting rods are inserted into the cavity of the ball cage seal cover to be assembled, the bent handle ring on the sliding sleeve is folded with the pin rod, the supporting rods are pushed to be opened, under the joint action of the six supporting rods, the ball cage seal cover to be assembled is expanded to a required range, in the supporting state of the expander, the six supporting rods are aligned with the six grooves of the ball cage shaft, and the expanded ball cage seal cover is turned over the outer spherical surface of the ball cage shaft, then the bent handle ring on the sliding sleeve is loosened, the supporting rods are contracted, the ball cage seal cover is elastically contracted and is sleeved on the inner spherical surface of the ball cage shaft, the expander is removed, and the ball cage seal cover is moved to the shaft diameter part of the ball cage shaft, and the assembly of the ball cage seal cover is completed.

[0012] Compared with the prior art, the expander is simple in structure, light in weight and convenient to hold, and can be inserted into the cavity of the ball cage seal cover to be assembled without air source in the assembly process of the ball cage seal cover, the expander can be conveniently removed after assembly, the assembly is stable and reliable, the ball cage seal cover is not damaged, the assembly efficiency and quality of the ball cage seal cover are greatly improved, and the labor intensity of the operator is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to make the content of the utility model more easily and clearly understood, the utility model is further described in detail below according to specific embodiments and in combination with the drawings, in which:

[0014] Figure 1 is a structural diagram of the utility model.

[0015] Figure 2 is a structural diagram of the utility model in an expansion state.

[0016] Figure: 1, ball cage seal cover; 2, strut; 2-1, support hole; 3, fixed ring; 3-1, rib; 3-2, outer ring; 3-3, inner ring; 3-4, opening; 4, spring; 5, sliding sleeve; 5-1, groove; 5-2, curved handle ring; 6, shaft baffle; 7, pin rod; 8, compression screw; 9, ball cage shaft. DETAILED DESCRIPTION

[0017] In order to make the application purpose, technical scheme and advantages of the utility model more clear and intelligible, the following will make further detailed description to the utility model combined with embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the protection scope of the utility model.

[0018] As shown in Figure 1 , Figure 2 , the utility model discloses a handheld ball cage seal cover dilator mainly includes strut 2, fixed ring 3, spring 4, sliding sleeve 5, shaft baffle 6, pin rod 7, compression screw 8. One end of strut 2 is embedded in the equal division groove 5-1 on sliding sleeve 5, and the middle inside of strut 2 is sleeved on the outer ring 3-2 of fixed ring 3, and the rib 3-1 of fixed ring 3 is fixed with the inner ring 3-3 and the outer ring 3-2 of fixed ring 3 respectively, and spring 4 is sleeved on the inner ring 3-3 of fixed ring 3, and the both ends of spring 4 are respectively abutted on the shaft shoulder of the inner ring 3-3 of fixed ring 3 and the end face of sliding sleeve 5, and shaft baffle 6 is clamped on the inner ring 3-3 of fixed ring 3, and sliding sleeve 5 is axially limited, and pin rod 7 passes through the hole of the end part of the inner ring 3-3 of fixed ring 3, and pin rod 7 is fixed with the inner ring 3-3 of fixed ring 3 by compression screw 8, and pin rod 7 is located in the curved handle ring 5-2 on sliding sleeve 5.

[0019] Preferably, the strut 2 is six, which is similar to the structure of bird's beak, and the middle arch inside of each strut 2 is drilled with support hole 2-1, and the strut 2 is sleeved on the outer ring 3-2 of fixed ring 3 as fulcrum through support hole 2-1, and under the action of lever, six struts 2 slightly close or open, so that larger expansion or contraction stroke can be obtained, and the curved handle ring 5-2 on sliding sleeve 5 is closed with pin rod 7, and strut 2 is opened by pushing, and under the common action of six struts 2, ball cage seal cover 1 is expanded to the required range, and the ball cage seal cover 1 is of rubber material and has proper elasticity.

[0020] Preferably, the fixed ring 3 is steering wheel structure, and three equal division ribs 3-1 fix the inner ring 3-3 with the outer ring 3-2, and the outer ring 3-2 has three equal division openings 3-4, so as to facilitate the outer ring 3-2 to be sleeved in the support hole 2-1 on the strut 2.

[0021] The spring 3 is a conical compression spring, which can not only expand the inner ring 3-3 of fixed ring 3 and sliding sleeve 5 in the axial direction, but also provide support for strut 2 in the radial direction, so that six struts 2 keep synchronous movement.

[0022] Preferably, the sliding sleeve 5 has six equidistant grooves 5-1, which are slightly wider than the thickness of the support rods 2, and the ends of the six support rods 2 are embedded in the grooves 5-1 to uniformly distribute the support rods 2, and the tail of the sliding sleeve 5 is welded with a bent handle ring 5-2 to facilitate hand holding.

[0023] Preferably, the support rods 2 and the sliding sleeve 5 are made of aluminum alloy.

[0024] The utility model discloses a spring 4 is opened to fixed ring 3 and sliding sleeve 5 under no external force, and the dilator is in natural contraction state, and the shaft baffle 6 carries out axial location to sliding sleeve 5, and it is limited in certain telescopic range, and pin rod 7 passes through fixed ring 3 and is fixed with compression screw 8, under the dilator contraction state, inserts support rod 2 into the cavity of the ball cage seal cover 1 to be assembled, and the bent handle ring 5-2 on the sliding sleeve 5 is folded with pin rod 7 under hand pressure, and support rod 2 is pushed open, and under the joint action of six support rods 2, the ball cage seal cover 1 to be assembled is expanded to the required range, as shown in the drawing, Figure 2 under the dilator opening state, six support rods 2 are aligned with six channels of the ball cage shaft 9, and the expanded ball cage seal cover 1 is turned over the outer spherical surface of the ball cage shaft 9, and then the bent handle ring 5-2 on the sliding sleeve 5 is loosened, and the support rod 2 is contracted by releasing force, and the ball cage seal cover 1 is elastically contracted on the inner spherical surface of the ball cage shaft 9, and the dilator is removed, and the ball cage seal cover 1 is moved to the shaft diameter part of the ball cage shaft 9, and the assembly of the ball cage seal cover 1 is completed.

[0025] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A handheld ball cage sealing cover expander, characterized in that: One end of the strut (2) is embedded in the equally divided groove (5-1) on the sliding sleeve (5). The inner side of the middle part of the strut (2) is fitted onto the outer ring (3-2) of the fixing ring (3). The two ends of the rib (3-1) of the fixing ring (3) are fixed to the inner ring (3-3) and the outer ring (3-2) of the fixing ring (3) respectively. The spring (4) is fitted onto the inner ring (3-3) of the fixing ring (3), and the two ends of the spring (4) are pressed against the fixing ring (3) respectively. On the shoulder of the inner ring (3-3) and the end face of the sliding sleeve (5), the shaft retaining ring (6) is fitted on the inner ring (3-3) of the fixing ring (3) to axially limit the sliding sleeve (5). The pin (7) passes through the hole at the end of the inner ring (3-3) of the fixing ring (3) and is fixed to the inner ring (3-3) of the fixing ring (3) with the clamping screw (8). The pin (7) is located in the bent handle ring (5-2) on the sliding sleeve (5).

2. The handheld ball cage sealing cover expander according to claim 1, characterized in that: The strut (2) There are six support rods (2), each with a bird's beak-shaped structure. Each support rod (2) has a support hole (2-1) drilled on the inner side of the central arch. The support rod (2) is fitted onto the outer ring (3-2) of the fixing ring (3) through the support hole (2-1) as a fulcrum. The bent handle ring (5-2) on the sliding sleeve (5) is pressed to close with the pin (7), pushing the support rod (2) to open. Under the combined action of the six support rods (2), the ball cage sealing cover (1) expands to the required range. The ball cage sealing cover (1) is made of rubber.

3. The handheld ball cage sealing cover expander according to claim 1, characterized in that: The fixing ring (3) is a steering wheel-shaped structure with three equally divided ribs (3-1) to fix the inner ring (3-3) and the outer ring (3-2). The outer ring (3-2) has three equally divided openings (3-4) for easy insertion of the outer ring (3-2) into the support hole (2-1) on the support rod (2).

4. The handheld ball cage sealing cover expander according to claim 1, characterized in that: The spring (4) is a conical compression spring, which can both axially expand the inner ring (3-3) of the fixed ring (3) and the sliding sleeve (5) and provide support for the struts (2) in the radial direction, so that the six struts (2) can move synchronously.

5. A handheld ball cage sealing cover expander according to claim 1, characterized in that: The sliding sleeve (5) has six equally divided grooves (5-1), the width of which is slightly wider than the thickness of the support rod (2). One end of the six support rods (2) is embedded in the grooves (5-1) to make the support rods (2) evenly distributed. A curved handle wristband (5-2) is welded to the tail of the sliding sleeve (5) for easy hand holding.

6. The handheld ball cage sealing cover expander according to claim 1, characterized in that: Both the support rod (2) and the sliding sleeve (5) are made of aluminum alloy.

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