CN218384472U

CN218384472U - Piano truckle

Info

Publication number: CN218384472U
Application number: CN202222676880.7U
Authority: CN
Inventors: 樊建能
Original assignee: Ningbo Sihai Piano Co ltd
Current assignee: Ningbo Sihai Piano Co ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-01-24
Anticipated expiration: 2032-10-12

Abstract

The utility model discloses a piano caster, which comprises a pin shaft (1), a supporting seat (2), a mounting seat (3), a shaft sleeve (4), two idler wheels (5) and an idler wheel shaft (6); the bottom activity of round pin axle (1) passes second through-hole (2.2) and axial spacing, the top activity embedding of round pin axle (1) is in axle sleeve (4) and axial spacing, the external screw thread of axle sleeve (4) is screwed with the internal thread of mount pad (3), the bottom of mount pad (3) is equipped with first bulge loop (3.1), the bottom of axle sleeve (4) is equipped with second bulge loop (4.1), axle sleeve (4) outer wall cover has wave spring (7), the bottom of wave spring (7) offsets with the top surface of second bulge loop (4.1), and the top offsets with the bottom surface of first bulge loop (3.1). This piano truckle increases wave spring to avoid making the mount pad separation of connecting axle and piano bottom, increase the reliability.

Description

Piano truckle

Technical Field

The utility model relates to a piano accessory technical field specifically says a piano truckle.

Background

At present, the applicant previously applies for a piano caster which comprises a connecting shaft, a mounting bracket, a group of rollers and a pin shaft, wherein the bottom of the connecting shaft is connected with the top of the mounting bracket, the mounting bracket is provided with two side walls, and the pin shaft penetrates through a central hole of the roller and is rotatably connected with the roller; two ends of the pin shaft extend out of two ends of the roller; the two side walls of the mounting bracket are provided with arc grooves which are bilaterally symmetrical, the two ends of the pin shaft extending out of the roller are respectively embedded into the arc grooves of the two side walls, the two side walls are respectively provided with a locking structure, and the locking structure at each side locks the pin shaft embedded into the arc grooves. The piano truckle of this structure is installed piano bottom back, behind frequent removal piano, can lead to the connecting axle of piano to drop, after seeking the reason, finds the screw thread of connecting axle and unscrews, because the truckle can turn to when removing, leads to the connecting axle to rotate at the direction of screw thread unscrewing always, can lead to the removal that does not stop and drop.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide an increase wave spring to avoid making the connecting axle and the mount pad separation of piano bottom, increase the piano truckle of reliability.

The technical scheme of the utility model is that, a piano truckle with following structure is provided, including round pin axle, supporting seat, mount pad, axle sleeve, two gyro wheels and roller shaft, the mount pad is fixed in the piano bottom, the round pin axle passes the centre bore of axle sleeve, the outer wall of axle sleeve is equipped with the external screw thread, the hole of mount pad is equipped with the internal thread, the roller shaft passes the centre bore of two gyro wheels and both ends stretch out, the bottom of supporting seat is equipped with two lateral walls, is equipped with a first through-hole on each lateral wall, is equipped with the second through-hole at the roof, the roller shaft both ends pass respectively in the first through-hole that corresponds one side; the method is characterized in that: the bottom of the pin shaft movably penetrates through the second through hole and is axially limited, the top of the pin shaft is movably embedded into the shaft sleeve and is axially limited, the external thread of the shaft sleeve is screwed with the internal thread of the mounting seat, the bottom of the mounting seat is provided with a first convex ring, the bottom of the shaft sleeve is provided with a second convex ring, the outer wall of the shaft sleeve is sleeved with a wave spring, the bottom of the wave spring is abutted against the top surface of the second convex ring, and the top of the wave spring is abutted against the bottom surface of the first convex ring.

The mount pad is equipped with a plurality of third through-holes along circumference evenly distributed, the mount pad passes the third through-hole respectively through many bolts and fixes to the piano bottom.

The side wall uniform part of the second convex ring is provided with three notches and three planes, and each plane is positioned between two adjacent notches.

The position of the pin shaft close to the top is provided with a sealing ring, the outer wall of the sealing ring is abutted against the inner wall of the shaft sleeve for sealing, and the inner wall of the sealing ring is embedded into the groove of the pin shaft.

The wave spring is of a double-layer structure, and the two spring pieces are attached to each other through the elasticity of the wave spring.

The top surface of the second convex ring is provided with an annular groove, the annular groove and the axial direction are coaxial with the shaft sleeve, and the bottom surface of the wave spring is embedded in the annular groove.

After the structure more than adopting, the utility model has the advantages of it is following: because the bottom of the pin shaft movably penetrates through the second through hole and is axially limited, the top of the pin shaft is movably embedded into the shaft sleeve and is axially limited, the shaft pin and the shaft sleeve are positioned firstly through the axial direction, and then the external thread of the shaft sleeve is screwed with the internal thread of the mounting seat, so that the pin shaft and the shaft sleeve are fixed. Because the bottom of mount pad is equipped with first bulge loop, the bottom of axle sleeve is equipped with the second bulge loop, axle sleeve outer wall cover has wave spring, wave spring's bottom offsets with the top surface of second bulge loop, and the top offsets with the bottom surface of first bulge loop, also is that first bulge loop is as supporting, and rethread wave spring provides the pretightning force for the second bulge loop of axle sleeve, provides certain axial pressure, can prevent that the axle sleeve from rotating and not hard up droing.

As an improvement, the mounting seat is provided with a plurality of third through holes which are uniformly distributed along the circumference, and the mounting seat penetrates through the third through holes respectively through a plurality of bolts to be fixed to the bottom of the piano, so that the mounting seat is convenient to mount.

As an improvement, the side wall uniform part of the second convex ring is provided with three notches and three planes, each plane is positioned between two adjacent notches, and the shaft sleeve can be conveniently rotated by a tool to be screwed or unscrewed with the mounting seat.

As an improvement, a sealing ring is arranged at the position, close to the top, of the pin shaft, the outer wall of the sealing ring is abutted to the inner wall of the shaft sleeve to be sealed, and the inner wall of the sealing ring is embedded into the groove of the pin shaft, so that external dust is prevented from entering the inner part of the pin shaft.

As an improvement, the wave spring is of a double-layer structure, and the two spring pieces are attached through the elasticity of the wave spring, so that the strength of the wave spring is improved.

As an improvement, the top surface of the second convex ring is provided with an annular groove, the annular groove is coaxial with the shaft sleeve in the axial direction, and the bottom surface of the wave spring is embedded in the annular groove, so that the wave spring is prevented from sliding accidentally.

Drawings

Fig. 1 is an explosion diagram of the caster of the piano of the present invention.

Fig. 2 is a schematic perspective view of the caster of the piano of the present invention.

Fig. 3 is a schematic sectional view of the caster of the piano of the present invention.

Fig. 4 is a schematic view of the shaft sleeve of the present invention.

Shown in the figure:

1. the hinge pin comprises a hinge pin body, 2, a supporting seat, 2.1, a first through hole, 2.2, a second through hole, 3, a mounting seat, 3.1, a first convex ring, 4, a shaft sleeve, 4.1, a second convex ring, 4.2, a notch, 4.3, a plane, 5, a roller, 6, a roller shaft, 7, a wave spring, 8 and a sealing ring.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1-4, the utility model discloses a piano caster, including round pin axle 1, supporting seat 2, mount pad 3, axle sleeve 4, two gyro wheels 5 and gyro wheel axle 6, mount pad 3 is fixed in the piano bottom, mount pad 3 is equipped with a plurality of third through-holes 3.2 along circumference evenly distributed, mount pad 3 passes third through-hole 3.2 respectively through many bolts and fixes to the piano bottom.

The hinge pin 1 penetrates through a center hole of the shaft sleeve 4, an external thread is arranged on the outer wall of the shaft sleeve 4, and an internal thread is arranged in an inner hole of the mounting seat 3. And a second convex ring 4.1 is arranged at the bottom of the shaft sleeve 4.

The roller shaft 6 penetrates through center holes of the two rollers 5, two ends of the roller shaft extend out of the center holes, two side walls are arranged at the bottom of the supporting seat 2, a first through hole 2.1 is formed in each side wall, a second through hole 2.2 is formed in the top plate, and two ends of the roller shaft 6 penetrate through the first through holes 2.1 on the corresponding side respectively.

The bottom of the pin shaft 1 movably penetrates through the second through hole 2.2 and is axially limited, the top of the pin shaft 1 is movably embedded into the shaft sleeve 4 and is axially limited, and the external thread of the shaft sleeve 4 is screwed with the internal thread of the mounting seat 3.

The bottom of mount pad 3 is equipped with first bulge loop 3.1, the bottom of axle sleeve 4 is equipped with second bulge loop 4.1, and the external diameter of first bulge loop 3.1 is greater than the external diameter of second bulge loop 4.1.

The outer wall of the shaft sleeve 4 is sleeved with a wave spring 7, the bottom of the wave spring 7 is abutted against the top surface of the second convex ring 4.1, and the top of the wave spring is abutted against the bottom surface of the first convex ring 3.1.

The even part of lateral wall of second bulge loop 4.1 has three breach 4.2 and three plane 4.3, and every plane 4.3 is located between two adjacent breach 4.2, and the spanner of convenient customization can cooperate with plane 4.3 to rotate axle sleeve 4, make axle sleeve 4 screw or unscrew with mount pad 3.

The position of the pin shaft 1 close to the top is provided with a sealing ring 8, the outer wall of the sealing ring 8 is abutted against the inner wall of the shaft sleeve 4 for sealing, the inner wall of the sealing ring 8 is embedded into the groove of the pin shaft 1, and the sealing ring 8 prevents dust from entering the hole of the shaft sleeve 4.

The wave spring 7 is of a double-layer structure, and two spring pieces are attached through self elasticity.

The top surface of the second convex ring 4.1 is provided with an annular groove, the annular groove and the axial direction are coaxial with the shaft sleeve 4, the bottom surface of the wave spring 7 is embedded in the annular groove, and due to the fact that the inner diameter of the wave spring 7 is large, a certain sliding gap is formed after the wave spring 7 is sleeved outside the shaft sleeve 4, after the annular groove is added, the wave spring 7 can be limited in the annular groove, and therefore the wave spring 7 can be guaranteed to be in a relatively middle position, and installation failure is avoided.

Claims

1. A caster wheel for a piano comprises a pin shaft (1), a supporting seat (2), a mounting seat (3), a shaft sleeve (4), two idler wheels (5) and an idler wheel shaft (6); the piano comprises a mounting seat (3), a pin shaft (1), an axle sleeve (4), an external thread, an internal thread, two roller shafts (6), an internal thread, two side walls, a first through hole (2.1) and a second through hole (2.2), wherein the mounting seat (3) is fixed at the bottom of a piano, the pin shaft (1) penetrates through a center hole of the axle sleeve (4), the external thread is arranged on the outer wall of the axle sleeve (4), the internal thread is arranged in an inner hole of the mounting seat (3), the roller shafts (6) penetrate through center holes of two rollers (5), and two ends of each roller shaft extend out of the center hole; two ends of the roller shaft (6) respectively penetrate through the first through holes (2.1) on the corresponding side; the method is characterized in that: the bottom activity of round pin axle (1) passes second through-hole (2.2) and axial spacing, the top activity embedding of round pin axle (1) is in axle sleeve (4) and axial spacing, the external screw thread of axle sleeve (4) is screwed with the internal thread of mount pad (3), the bottom of mount pad (3) is equipped with first bulge loop (3.1), the bottom of axle sleeve (4) is equipped with second bulge loop (4.1), axle sleeve (4) outer wall cover has wave spring (7), the bottom of wave spring (7) offsets with the top surface of second bulge loop (4.1), and the top offsets with the bottom surface of first bulge loop (3.1).

2. A piano caster according to claim 1, wherein: the mounting seat (3) is provided with a plurality of third through holes (3.2) which are uniformly distributed along the circumference, and the mounting seat (3) penetrates through the third through holes (3.2) respectively through a plurality of bolts to be fixed to the bottom of the piano.

3. A piano caster according to claim 1, wherein: the side wall uniform part of the second convex ring (4.1) is provided with three notches (4.2) and three planes (4.3), and each plane (4.3) is positioned between two adjacent notches (4.2).

4. A piano caster according to claim 1, wherein: the part of the pin shaft (1) close to the top is provided with a sealing ring (8), the outer wall of the sealing ring (8) is abutted against the inner wall of the shaft sleeve (4) for sealing, and the inner wall of the sealing ring (8) is embedded into the groove of the pin shaft (1).

5. A piano caster according to claim 1, wherein: the wave spring (7) is of a double-layer structure, and the two spring pieces are attached through the elasticity of the wave spring.

6. A piano caster according to claim 1, wherein: the top surface of the second convex ring (4.1) is provided with an annular groove, the annular groove and the axial direction are coaxial with the shaft sleeve (4), and the bottom surface of the wave spring (7) is embedded in the annular groove.