CN215854793U

CN215854793U - Straight cylinder crane

Info

Publication number: CN215854793U
Application number: CN202122211707.5U
Authority: CN
Inventors: 张飞文
Original assignee: Xiamen Wentian Digital Machinery Co ltd
Current assignee: Xiamen Wentian Digital Machinery Co ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2022-02-18
Anticipated expiration: 2031-09-13

Abstract

The utility model relates to a straight drum crane, which can comprise: a frame; the first main shaft is rotatably arranged on the rack and is in driving connection with the motor; the bobbin is arranged on the first main shaft and can move along the axial direction of the first main shaft while rotating along with the first main shaft, so that the winding and unwinding positions of the steel wire rope wound on the bobbin are kept unchanged; the sheath is arranged on the rack, sleeved outside the bobbin and capable of moving along the axial direction of the first main shaft along with the bobbin, and provided with an axial opening for retracting the steel wire rope; and the wire pressing wheel is arranged on the rack and is in driving connection with the motor, and the wire pressing wheel is positioned at the retracting position and is pressed on the steel wire rope. The utility model can ensure that the steel wire rope cannot be loosened or jumped under any condition through the sheath outside the winding drum, greatly prolongs the service life of the crane, and simultaneously can provide good pressing force because the wire pressing wheel is driven by the motor, and ensures that the steel wire rope cannot jump.

Description

Straight cylinder crane

Technical Field

The utility model belongs to the field of electric cranes, and particularly relates to a straight-barrel crane.

Background

The electric crane is an automatic hoisting device with wide application. Electric hoists generally include a reel having a wire chase and a wire rope wound around the wire chase. Under the condition that a heavy object is hung, the steel wire can go upwards around the winding drum in a circle when being taken up, and the steel wire rope cannot be loosened or jumped. However, if the crane is in an idle state, for example, when no heavy object exists, or when power failure needs to be done and people need to pull up the steel wire rope, the steel wire rope is easy to arch upwards, so that the steel wire rope is loosened or jumped (that is, the steel wire rope runs to the round), and the steel wire rope becomes disordered, so that the crane cannot be used normally (scrapped), and the service life is short.

In addition, the wire pressing wheels of the existing electric crane are driven wheels, and are easy to jump and not pressed tightly, so that the normal operation of the electric crane is influenced.

Disclosure of Invention

The utility model aims to provide a straight drum crane to solve the problems. Therefore, the utility model adopts the following specific technical scheme:

a straight drum hoist, which may comprise:

a frame;

the first main shaft is rotatably arranged on the rack and is in driving connection with the motor;

the bobbin is mounted on the first main shaft and can move along the axial direction of the first main shaft while rotating along with the first main shaft, so that the winding and unwinding positions of the steel wire rope wound on the bobbin are kept unchanged;

the sheath is arranged on the rack, sleeved outside the bobbin and capable of moving along with the bobbin along the axial direction of the first main shaft, and provided with an axial opening allowing the steel wire rope to be wound and unwound;

and the wire pressing wheel is arranged on the rack and is in driving connection with the motor, so that the rotating direction of the wire pressing wheel is opposite to that of the winding drum, and the wire pressing wheel is positioned at the winding and unwinding position and pressed on the steel wire rope.

Further, the spindle is provided with a hexagonal part and a circular part, the bobbin is sleeved on the hexagonal part, a screw rod is sleeved on the circular part, a nut sleeve is fixed on the end face of the bobbin far away from the motor, and the nut sleeve is in threaded connection with the screw rod.

Furthermore, the wire pressing wheel and the motor are in driving connection through a gear transmission mechanism, and the reduction ratio of the gear transmission mechanism is set to enable the linear speeds of the wire pressing wheel and the winding reel to be the same.

Further, the gear transmission mechanism comprises a second main shaft, a driving gear, a first gear, a second gear, a third gear and a fourth gear, the second main shaft is rotatably installed on the rack and is parallel to the first main shaft, the driving gear is fixed on the first main shaft, the second gear is fixed on the second main shaft, the first gear is installed on the rack, two sides of the first gear are respectively meshed with the driving gear and the second gear, the third gear is fixed on the second main shaft, the fourth gear is fixed on a line pressing shaft and is meshed with the third gear, and the line pressing wheel is fixed on the line pressing shaft.

Further, the number of teeth of the driving gear and the first gear is set to satisfy the reduction ratio, the number of teeth of the first gear and the second gear is the same, and the number of teeth of the third gear and the fourth gear is the same.

Further, the second main shaft has a hexagonal portion, and the second gear and the third gear have a hexagonal central through hole.

Further, the wire pressing wheel shaft is rotatably installed on the wire pressing wheel support, the wire pressing wheel support is rotatably installed on the second main shaft, the wire pressing wheel support is provided with a spring fixing portion, an adjusting screw is installed on the rack, and a spring is installed between the spring fixing portion and the adjusting screw so that the angle of the wire pressing wheel can be adjusted through the adjusting screw.

Furthermore, two ends of the sheath are respectively sleeved on two optical axes in a sliding manner, and the optical axes are fixed on the rack and are parallel to the first main shaft; clamping grooves are formed in two ends of the winding drum, annular protrusions are arranged on the inner wall of the sheath, and the annular protrusions are clamped in the clamping grooves.

Further, the sheath comprises two halves hinged together.

Further, a plurality of axially extending roller pins are mounted on the inner wall of the jacket, and the roller pins contact the steel wire rope.

By adopting the technical scheme, the utility model has the beneficial effects that: through the sheath outside the bobbin, can ensure that wire rope can not appear taking off or jump the circle phenomenon under any circumstance, improve the life of loop wheel greatly, simultaneously because the fabric wheel is driven by the motor, be initiative pivoted promptly, can provide fine packing force, ensure that wire rope can not beat.

Drawings

To further illustrate the various embodiments, the utility model provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

FIG. 1 is a perspective view of a straight drum crane of the present invention;

FIG. 2 is another perspective view of the straight drum crane shown in FIG. 1 with portions of the frame removed to show internal structure;

FIG. 3 is a front view of the straight drum crane shown in FIG. 1;

FIG. 4 is a cross-sectional view of the straight drum crane taken along line A-A in FIG. 3;

fig. 5 is an exploded view of a mounting structure of a bobbin of the straight drum crane shown in fig. 1;

FIG. 6 is a perspective view of the jacket of the straight drum hoist shown in FIG. 1;

fig. 7 is a perspective view of an installation structure of a wire pressing wheel of the straight drum crane shown in fig. 1.

Detailed Description

The utility model will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 1-4, a straight drum crane may include:

the device comprises a rack 1, wherein the rack 1 is a rectangular body and can be formed by a steel structure;

a first main shaft 2, wherein the first main shaft 2 is rotatably mounted on the frame 1 and is in driving connection with the motor 3, that is, two ends of the first main shaft 2 are respectively mounted on the frame 1 through corresponding bearings (for example, deep groove bearings), and one end of the first main shaft is connected with an output shaft 31 of the motor 3 through a corresponding speed reducer 32, so that the first main shaft 2 can be driven by the motor 3 to rotate;

a bobbin 4, the bobbin 4 having a plurality of helically arranged winding grooves 41, the winding grooves 41 being configured to receive a steel wire rope 5 (only a vertical section is shown in the figure), the bobbin 4 being mounted on the first main shaft 2 and being capable of moving in an axial direction of the first main shaft 2 while rotating along with the main shaft 2, so that a winding and unwinding position of the steel wire rope 5 wound on the bobbin 4 is maintained, that is, the bobbin 4 is capable of moving axially while rotating;

the sheath 6 is mounted on the frame 1, sleeved outside the bobbin 4 and capable of moving along with the bobbin 4 along the axial direction of the first main shaft 2, the sheath 6 is provided with an axial opening 61 (see fig. 6) allowing the steel wire rope 5 to be wound and unwound, and a gap between the sheath 6 and the bobbin 4 is smaller than the wire diameter of the steel wire rope 5, so that the steel wire rope 5 cannot jump when being wound;

the wire pressing wheel 7 is installed on the rack 1 and is in driving connection with the motor 3, so that the rotating direction of the wire pressing wheel 7 is opposite to that of the winding drum 4, the wire pressing wheel 7 is located at the winding and unwinding position and is pressed on the steel wire rope 5, and the wire pressing wheel 7 is driven by the motor 3, namely is in active rotation, so that good pressing force can be provided, and the steel wire rope cannot jump.

As shown in fig. 4 and 5, the first main shaft 2 and the reduction gear 32 are connected by a key way (flat key). Specifically, the first spindle 2 has a through hole 23 with a rectangular groove 231, and the output shaft of the speed reducer 32 has a flat key 321. The first spindle 2 has a hexagonal part 21 and a circular part 22. The bobbin 4 has a hexagonal central through hole 42. The bobbin 4 is fixedly connected to the first spindle 2 by fitting the hexagonal central through hole 42 over the hexagonal portion 21. Accordingly, the bobbin 4 can rotate along with the first main shaft 2. It will be appreciated that the bobbin 4 may be secured to the first spindle 2 in other conventional ways. The circular part 22 is sleeved with a screw 81. The screw 81 is a T-shaped screw, and the flange end thereof is fixed on the frame 1 by screws. A nut sleeve 82 is fixed on the end surface of the bobbin 4 far away from the motor 3, the nut sleeve 82 is a T-shaped nut sleeve, and the flange end of the nut sleeve is fixed on the frame bobbin 4 through a screw. The nut housing 82 is threadedly engaged with the lead screw 81. Thus, the bobbin 4 can move in the axial direction while rotating. The wire outlet end of the wire rope 5 is positioned at one end of the winding reel 4 far away from the motor 3. During paying off, the winding reel 4 moves towards the direction far away from the motor 3, and during taking up, the winding reel 4 moves towards the direction close to the motor 3.

As shown in fig. 2, 4 and 6, two ends of the sheath 6 are respectively slidably sleeved on two optical axes 62, the optical axes 62 are fixed on the frame 1 and are parallel to the first main shaft 2, two ends of the bobbin 4 are provided with clamping grooves 43, correspondingly, the inner wall of the sheath 6 is provided with an annular protrusion 63, and the annular protrusion 63 is clamped in the clamping grooves 43, so that the sheath 6 can slide along the optical axes 62 along with the bobbin 4. For ease of installation, the sheath 6 comprises two halves hinged together, i.e. the sheath 6 is in the form of a clip.

Preferably, a plurality of axially extending roller pins 64 are mounted on the inner wall of the jacket 6, said roller pins 64 contacting the wire rope 5, i.e. limiting the wire rope 5 against its jump. Since the needle roller 64 can rotate with the wire rope 5, the wire rope 5 is not damaged.

In order to increase the strength of the annular projection 63 of the sheath 6 and to avoid it being deformed away from the bobbin 4 by being subjected to too great a force, a plurality of reinforcing angle braces 65 are provided between the annular projection 63 and the inner wall of the sheath 6.

The sheath 6 may be made of a metallic material (e.g., steel) or a high strength non-metallic material.

As shown in fig. 1, 2 and 7, the wire pressing wheel 7 is in driving connection with the motor 2 by adopting a gear transmission mechanism. Specifically, the gear transmission mechanism may include a second main shaft 91, a driving gear 92, a first gear 93, a second gear 94, a third gear 95, and a fourth gear 96. The second main shaft 91 is rotatably mounted on the frame 1 through bearings at both ends and is parallel to the first main shaft 2. The driving gear 92 is fixed to the first main shaft 2 (specifically, the hexagonal portion 21), that is, the driving gear 92 has a hexagonal through hole. A first gear 93 is mounted on the frame 1 and is engaged with the driving gear 92 and the second gear 94 on two sides, i.e. the first gear 93 is used as a carrier gear. A second gear 94 and a third gear 95 are fixed to both sides of the second main shaft 91, respectively. The fourth gear 96 is fixed to the platen shaft 71 and meshes with the third gear 95. The wire pressing shaft 71 is parallel to the second main shaft 91, and the wire pressing wheel 7 is fixed on the wire pressing shaft 71.

In order for the creasing-roller 7 and the bobbin 4 to have the same linear velocity, the gear transmission must have a suitable reduction ratio. In one embodiment, the gear train has a reduction ratio of 4: 1. The number of teeth of each gear is as follows: the number of teeth of the driving gear 92 is 124, the number of teeth of the first gear 93 and the second gear 94 is 31, and the number of teeth of the third gear 95 and the fourth gear 96 is 20.

Preferably, the drive gear 92, the first gear 93, the second gear 94, the third gear 95 and the fourth gear 96 are spur gears.

For ease of mounting, the second spindle 91 has a hexagonal portion 911, and the second gear 94 and the third gear 95 have hexagonal central through holes. The second gear 94 and said third gear 95 are fixed on the second main shaft 91 by their hexagonal central through holes cooperating with the hexagonal portion 911 and the corresponding snap springs.

In the present embodiment, the capstan shaft 71 is rotatably mounted on the capstan support 72. The capstan support 72 is rotatably mounted on the second main shaft 91. That is, the capstan support 72 has a through hole through which the second main shaft 91 passes. The capstan support 72 has a spring fixing portion 721. In the present embodiment, the spring fixing portion 721 is a cross-shaped columnar projection. An adjusting screw 73 is installed on the frame 1, and a spring 74 is installed between the spring fixing part 721 and the adjusting screw 73, so that the angle of the wire pressing wheel 7 can be adjusted through the adjusting screw 73, and further, the pressing force of the wire pressing wheel can be adjusted, and the wire rope can not jump.

In addition, as shown in fig. 2 and 3, the straight drum crane further includes a wire rope guide mechanism, which is fixedly mounted on the frame 1 and located below the bobbin 4, and is used for guiding the wire rope 5 to prevent the wire rope from swinging. The wire rope guide mechanism may include a pair of rollers 101 and a circular disc 102 with a guide through hole (not shown). The pair of rollers 101 is used to clamp the wire rope 5. The guide through-hole is located directly below the pair of rollers 101 so that the wire rope 5 can pass between the pair of rollers 101 and out of the guide through-hole.

Preferably, the motor 3 is a stepping motor to facilitate the control of the lifting of the wire rope 5.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A straight drum crane, characterized by comprising:

a frame;

the protective sleeve is arranged on the rack, sleeved outside the winding drum and capable of moving along with the winding drum along the axial direction of the first main shaft, and is provided with an axial opening allowing the steel wire rope to be wound and unwound;

2. The straight drum crane according to claim 1, wherein the first main shaft has a hexagonal portion and a circular portion, the bobbin is fitted over the hexagonal portion, a lead screw is fitted over the circular portion, and a nut sleeve is fixed to an end surface of the bobbin remote from the motor, the nut sleeve being threadedly engaged with the lead screw.

3. The straight drum crane according to claim 1, wherein the wire pressing wheel and the motor are in driving connection by a gear transmission mechanism, and the reduction ratio of the gear transmission mechanism is set to make the linear speeds of the wire pressing wheel and the winding drum identical.

4. The straight drum crane according to claim 3, wherein the gear transmission mechanism comprises a second main shaft, a driving gear, a first gear, a second gear, a third gear and a fourth gear, the second main shaft is rotatably mounted on the frame and is parallel to the first main shaft, the driving gear is fixed on the first main shaft, the second gear is fixed on the second main shaft, the first gear is mounted on the frame and is engaged with the driving gear and the second gear at both sides, respectively, the third gear is fixed on the second main shaft, the fourth gear is fixed on a trolley shaft and is engaged with the third gear, and the trolley is fixed on the trolley shaft.

5. The cylinder hoist according to claim 4, wherein the numbers of teeth of the drive gear and the first gear are set to satisfy the reduction ratio, the numbers of teeth of the first gear and the second gear are the same, and the numbers of teeth of the third gear and the fourth gear are the same.

6. The straight drum crane according to claim 4, wherein the second main shaft has a hexagonal portion, and the second gear and the third gear have a hexagonal central through hole.

7. The straight drum crane according to claim 4, wherein the wire pressing wheel shaft is rotatably mounted on a wire pressing wheel bracket rotatably mounted on the second main shaft, the wire pressing wheel bracket has a spring fixing portion, an adjusting screw is mounted on the frame, and a spring is mounted between the spring fixing portion and the adjusting screw so that the angle of the wire pressing wheel can be adjusted by the adjusting screw.

8. The straight drum crane according to claim 1, wherein two ends of the sheath are respectively sleeved on two optical axes in a sliding manner, and the optical axes are fixed on the frame and parallel to the first main shaft; clamping grooves are formed in two ends of the winding drum, annular protrusions are arranged on the inner wall of the sheath, and the annular protrusions are clamped in the clamping grooves.

9. The straight drum crane according to claim 1 or 8, wherein the jacket comprises two halves hinged together.

10. The straight drum crane according to claim 1, wherein a plurality of axially extending roller pins are mounted on the inner wall of said jacket, said roller pins contacting said wire rope.