Small-radius turning joint

Abstract

The utility model discloses a small-radius turning joint which is provided with a main shaft which is connected with a cross beam of a hoist and can rotate, a connecting assembly connected with walking trolleys, and a rotating assembly arranged between the main shaft and the connecting assembly, so that when an electric hoist turns, the two walking trolleys can automatically deflect through the main shaft in the turning process; compared with the situation that electric hoists of two walking trolleys need a turning track made of a large metal plate, after the turning joint is used, the radius of the turning track can be effectively reduced, the occupied space of the turning track is reduced, and the workshop space and the manufacturing cost are greatly saved. According to an existing common hoist, the turning joint can be installed only by forming two installation through holes allowing the main shaft to penetrate through in a hoist beam, transformation is easy and convenient, and application and popularization are convenient.

Description

Technical Field

[0001] This utility model relates to the field of electric hoist technology, and in particular to a small-radius turning joint. Background Technology

[0002] An electric hoist is a tool for hooking, lifting and transporting materials. It mainly includes a track, a traveling trolley, a hoist beam, a hoist body and a hook. The traveling trolley moves along the track to transport materials. The two traveling trolleys turn during material transport. Since both traveling trolleys are installed on the hoist beam, a large-radius arc track needs to be set on the track to enable the electric hoist to turn normally.

[0003] However, the electric hoists with two traveling trolleys require large-radius turning tracks, which not only makes it difficult for the electric hoists to turn stably, but also occupies a lot of factory space and is not conducive to the deployment of other railcars or factory equipment. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a small-radius turning joint.

[0005] This utility model provides a small-radius turning joint, comprising:

[0006] The main shaft extends through the gourd beam, and the axis of the main shaft extends vertically. The main shaft includes, from top to bottom, a lower limit section, a middle section, a bearing section, a clearance section, and an upper limit section. The top of the lower limit section abuts against the bottom of the gourd beam.

[0007] The connecting assembly includes an upper open rectangular sleeve that is rotatably fitted onto the top of the main shaft. The upper open rectangular sleeve has a bearing mounting hole at its bottom. The upper open rectangular sleeve is rotatably connected to the connecting shaft of the traveling trolley. The axial extension direction of the connecting shaft is a first direction.

[0008] The rotating assembly includes a ball bearing disposed in a bearing mounting hole, the inner wall of the ball bearing abutting against the outer wall of the bearing section, and a thrust ball bearing disposed on the bottom surface of the upper open rectangular sleeve, the top surface of the thrust ball bearing abutting against the bottom surface of the upper limit section.

[0009] Preferably, a rubber pressure block is fitted around the clearance section, and the rubber pressure block is located between the thrust ball bearing and the upper limit section.

[0010] Preferably, a dust cover is detachably installed on the top of the upper open rectangular sleeve, and the outer edge of the dust cover fits with the outer edge of the upper open rectangular sleeve.

[0011] Preferably, two bearing top seats are provided below the ball bearing, symmetrically arranged on both sides of the main shaft along the second direction. The bearing top seats include a half-cylinder and a base plate located at the outer edge of the bottom of the half-cylinder. The top of the half-cylinder abuts against the outer bearing shell of the ball bearing, and the base plate is detachably connected to the top of the gourd beam.

[0012] Preferably, a compensation washer is provided between the base plate and the hoist beam. The top of the compensation washer is provided with a threaded hole, and the base plate is provided with a through hole corresponding to the position of the threaded hole. The compensation washer and the base plate are detachably connected by bolts passing through the through hole and threadedly engaging with the threaded hole.

[0013] Preferably, the connecting assembly includes two side connecting plates disposed on both sides of the upper open rectangular sleeve along a first direction, and each side connecting plate has two connecting holes arranged along a second direction, and the two connecting shafts of the traveling trolley are respectively rotatably installed in the corresponding connecting holes.

[0014] Preferably, the upper open rectangular sleeve is provided with a locking block on the outer surface along the second direction, and the two side connecting plates are provided with a locking slot in the middle, with the inner wall of the locking slot fitting with the outer wall of the locking block.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model features a self-rotating main shaft connected to the hoist beam, a connecting component connected to the traveling trolley, and a rotating component located between the main shaft and the connecting component. When the electric hoist turns, the two traveling trolleys automatically deflect via the main shaft, making the turn more stable. Compared to electric hoists with two traveling trolleys that require a larger sheet metal turning track, the turning joint of this utility model effectively reduces the radius of the turning track, decreasing the space occupied and significantly saving factory space and manufacturing costs. Furthermore, existing ordinary hoists only require two through holes on the hoist beam for the main shaft to pass through to install the turning joint provided by this utility model, making the modification simple, convenient, and easy to promote and use.

[0017] Furthermore, the rotating assembly is equipped with thrust ball bearings and ball bearings. The ball bearings are fitted onto the bearing section, and the upper limit section abuts against the thrust ball bearings to achieve stable rotation of the main shaft. This ensures that the connecting assembly and the traveling trolley can rotate stably around the main shaft. In addition, a dust cover is provided on the rubber pressure block to cover the upper open rectangular sleeve, reducing dust from falling into the ball bearings and thrust ball bearings, avoiding wear on the bearing surfaces and reduction in precision, and ensuring operational stability.

[0018] In addition, there are two bearing top seats, bearing sections, compensation washers, and intermediate sections. After the compensation washers are installed, the two bearing top seats are used for assembly, so that the lower limit section is stably abutted against the bottom end of the hoist crossbeam, and the upper limit section abuts against the rubber pressure block, which prevents the main shaft from shifting axially and ensures the stable installation of the main shaft.

[0019] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of a small-radius turning joint provided in an embodiment of this application;

[0022] Figure 2 A cross-sectional structural diagram of a small-radius turning joint provided in an embodiment of this application;

[0023] Figure 3 A schematic diagram of an assembly structure of a small-radius turning joint and a traveling trolley provided for an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the structure of a bearing top seat in a small-radius turning joint, provided as an embodiment of this application.

[0025] The diagram is labeled as follows: 1. Main shaft; 11. Intermediate section; 12. Lower limit section; 13. Bearing section; 14. Clearance section; 15. Upper limit section; 2. Connecting assembly; 21. Upper open rectangular sleeve; 22. Clamping block; 23. Side connecting plate; 24. Bayonet; 25. Connecting hole; 3. Rotating assembly; 31. Compensating washer ring; 32. Bearing top seat; 321. Half cylinder; 322. Base plate; 33. Ball bearing; 34. Thrust ball bearing; 35. Rubber pressure block; 36. Dust cover; 4. Hoist crossbeam; 5. Traveling trolley; 51. Connecting shaft. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0027] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] Please refer to Figures 1-4 An embodiment of this utility model provides a small-radius turning joint, comprising:

[0029] The main shaft 1 extends through the hoist beam 4. The axis of the main shaft 1 extends vertically. From top to bottom, the main shaft 1 includes a lower limit section 12, a middle section 11, a bearing section 13, a clearance section 14, and an upper limit section 15. The top of the lower limit section 12 abuts against the bottom of the hoist beam 4. The sections are arranged in descending order of diameter as follows: lower limit section 12, middle section 11, bearing section 13, clearance section 14, and upper limit section 15.

[0030] The connecting component 2 includes an upper open rectangular sleeve 21 that is rotatably fitted onto the top of the main shaft 1. The upper open rectangular sleeve 21 has a bearing mounting hole at its bottom. The upper open rectangular sleeve 21 is rotatably connected to the connecting shaft 51 of the traveling trolley 5. The axis of the connecting shaft 51 extends in the first direction.

[0031] Rotating assembly 3 includes a ball bearing 33 disposed in a bearing mounting hole, the inner wall of the ball bearing 33 abutting against the outer wall of the bearing section 13, and a thrust ball bearing 34 disposed on the bottom surface of the upper open rectangular sleeve 21, the top surface of the thrust ball bearing 34 abutting against the bottom surface of the upper limit section 15.

[0032] like Figures 1-3 As shown, the first direction is Figure 1 In the forward and backward directions, when the hoist beam 4 is stationary, the traveling trolley 5 and the connecting assembly 2 can rotate around the main shaft 1. The upper open rectangular sleeve 21 of the connecting assembly 2 is not only rotatably connected to the bearing section 13 through the ball bearing 33, but also rotatably connected to the upper limit section 15 through the thrust ball bearing 34, improving the stability of rotation. Furthermore, when the electric hoist turns, the two traveling trolleys 5 will automatically deflect through the main shaft 1, making the turn more stable. Compared with electric hoists with two traveling trolleys 5 that require a larger sheet metal turning track, the turning joint of this utility model can effectively reduce the radius of the turning track and reduce the space occupied by the turning track, greatly saving factory space and manufacturing costs. In addition, existing ordinary hoists only need to open two mounting holes on the hoist beam 4 for the main shaft 1 to pass through to install the turning joint provided by this utility model, which is simple and convenient to modify and easy to promote and use.

[0033] In some embodiments, a rubber block 35 is fitted over the clearance section 14, and the rubber block 35 is disposed between the thrust ball bearing 34 and the upper limit section 15; for example Figure 2As shown, the upper limit section 15 is to press against the top of the thrust ball bearing 34. If the outer diameter of the upper limit section 15 is too large, the thrust ball bearing 34 will not be able to be fitted onto the outside of the main shaft 1. Therefore, a deformable rubber pressure block 35 is added as a radial distance compensation between the upper limit section 15 and the thrust ball bearing 34. This not only facilitates the installation of the thrust ball bearing 34, but also ensures the stability of rotation.

[0034] In some embodiments, a dust cover 36 is detachably installed on the top of the upper-opening rectangular sleeve 21, and the outer edge of the dust cover 36 fits with the outer edge of the upper-opening rectangular sleeve 21; such as Figure 2 As shown, the upper opening of the upper rectangular sleeve 21 is covered by the dust cover 36 to prevent dust from entering the upper rectangular sleeve 21 and reduce the impact of dust on the bearing.

[0035] In some embodiments, two bearing top seats 32 are provided below the ball bearing 33, symmetrically arranged on both sides of the main shaft 1 along a second direction. Each bearing top seat 32 includes a semi-cylinder 321 and a base plate 322 located at the outer edge of the bottom of the semi-cylinder 321. The top of the semi-cylinder 321 abuts against the outer bearing shell of the ball bearing 33, and the base plate 322 is detachably connected to the top of the hoist beam 4. Figure 2 , Figure 3 and Figure 4 As shown, during assembly, the two semi-cylinders 321 are fitted onto the outer wall of the main shaft 1, providing upward compressive force to the ball bearing 33, the upper open rectangular sleeve 21, and the rubber pressure block 35, and downward compressive force to the hoist beam 4. This ensures that the bottom end of the hoist beam 4 abuts against the top end of the lower limit section 12, and the bottom end of the upper limit section 15 abuts against the rubber pressure block 35. The main shaft 1 will not experience axial displacement during use, thus achieving stable installation and stable rotation of the main shaft 1.

[0036] In some embodiments, a compensating washer 31 is provided between the base plate 322 and the hoist beam 4. The top of the compensating washer 31 is provided with a threaded hole, and the base plate 322 is provided with a through hole corresponding to the position of the threaded hole. The compensating washer 31 and the base plate 322 are detachably connected by bolts passing through the through hole and threadedly engaging with the threaded hole. Figure 2 , Figure 3 and Figure 4 As shown, the bearing top seat 32 can be detachably installed with the compensating washer 31, and the compensating washer 31 abuts against the hoist beam 4. Under the premise of ensuring that the main shaft 1 will not shift axially, there is no need to open additional screw holes on the hoist beam 4, which avoids reducing the strength of the hoist beam 4 due to too many screw holes. In addition, if the compensating washer 31 is not used, the thickness of the base plate 322 or the length of the half cylinder 321 needs to be increased. This may cause the bearing top seat 32 to be too heavy and difficult to assemble or reduce the overall strength and make it easy to be damaged. Therefore, the compensating washer 31 is set to solve the above problems.

[0037] In some embodiments, the connecting assembly 2 includes two side connecting plates 23 disposed on both sides of the upper open rectangular sleeve 21 along a first direction. Each side connecting plate 23 has two connecting holes 25 arranged along a second direction. Two connecting shafts 51 of a traveling trolley 5 are rotatably mounted in the corresponding connecting holes 25. Figure 1 and Figure 3 As shown, the second direction is Figure 1 In the left and right directions, two connecting holes 25 are set to connect to the two connecting shafts 51 of a traveling trolley 5 to ensure the stability of the connection.

[0038] In some embodiments, the upper-opening rectangular sleeve 21 is provided with a locking block 22 on its outer surface along the second direction, and the two side connecting plates 23 are provided with a locking slot 24 in their middle portions, the inner wall of the locking slot 24 fitting with the outer wall of the locking block 22; for example Figure 1 As shown, the clip 22 is directly inserted into the slot 24 to achieve quick positioning and installation, which facilitates subsequent welding and fixing and improves assembly efficiency.

[0039] When this utility model is used to modify a common electric hoist, firstly, the connecting shaft 51 of the traveling trolley 5 is removed and then reassembled. During the reassembly process, the two connecting shafts 51 of one traveling trolley 5 are respectively passed through the corresponding connecting holes 25 to realize the installation of the connecting component 2. Then, the thrust ball bearing 34 is placed in the upward-opening rectangular sleeve 21, and the ball bearing 33 is installed inside the bearing mounting hole.

[0040] Next, through mounting holes are made in the hoist beam 4. The main shaft 1 is passed through the two mounting holes of the hoist beam 4 from bottom to top. Then, the compensation washer 31 is first put on the top of the main shaft 1, so that the main shaft 1 passes through the ball bearing 33 and the upper open rectangular sleeve 21, so that the ball bearing 33 is fitted into the bearing section 13. Then, the rubber pressure block 35 is fitted on the top of the main shaft 1, so that the rubber pressure block 35 is located between the upper limit section 15 and the thrust ball bearing 34.

[0041] Finally, two bearing top seats 32 are used between the ball bearing 33 and the compensating washer 31, so that the top of the half cylinder 321 abuts against the outer bearing shell of the ball bearing 33, and the base plate 322 is bolted to the compensating washer 31, thereby realizing the modification of a regular electric hoist.

[0042] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A small-radius turning joint for connecting a traveling trolley (5) and a hoist beam (4), characterized in that, include: The main shaft (1) extends through the gourd beam (4). The axis of the main shaft (1) extends vertically. The main shaft (1) includes, from top to bottom, a lower limit section (12), a middle section (11), a bearing section (13), a clearance section (14), and an upper limit section (15). The top end of the lower limit section (12) abuts against the bottom end of the gourd beam (4). The connecting component (2) includes an upper open rectangular sleeve (21) that is rotatably fitted on the top of the main shaft (1). The upper open rectangular sleeve (21) has a bearing mounting hole at the bottom. The upper open rectangular sleeve (21) is rotatably connected to the connecting shaft (51) of the traveling trolley (5). The axis of the connecting shaft (51) extends in a first direction. The rotating assembly (3) includes a ball bearing (33) disposed in a bearing mounting hole, the inner wall of the ball bearing (33) abutting against the outer wall of the bearing section (13), and a thrust ball bearing (34) disposed on the inner bottom surface of the upper open rectangular sleeve (21), the top surface of the thrust ball bearing (34) abutting against the bottom surface of the upper limit section (15).

2. The small-radius turning joint according to claim 1, characterized in that, The clearance section (14) is fitted with a rubber block (35), which is located between the thrust ball bearing (34) and the upper limit section (15).

3. The small-radius turning joint according to claim 2, characterized in that, The top of the upper open rectangular sleeve (21) is detachably fitted with a dust cover (36), and the outer edge of the dust cover (36) fits with the outer edge of the upper open rectangular sleeve (21).

4. The small-radius turning joint according to claim 1, characterized in that, Below the ball bearing (33), there are two bearing top seats (32) symmetrically arranged on both sides of the main shaft (1) along the second direction. The bearing top seat (32) includes a half cylinder (321) and a bottom plate (322) located on the outer edge of the bottom of the half cylinder (321). The top of the half cylinder (321) abuts against the outer bearing shell of the ball bearing (33), and the bottom plate (322) is detachably connected to the top of the gourd beam (4).

5. The small-radius turning joint according to claim 4, characterized in that, A compensation washer (31) is provided between the base plate (322) and the gourd beam (4). The top of the compensation washer (31) is provided with a threaded hole. The base plate (322) is provided with a through hole corresponding to the position of the threaded hole. The compensation washer (31) and the base plate (322) are detachably connected by bolts through the through hole and threadedly engaging with the threaded hole.

6. The small-radius turning joint according to claim 1, characterized in that, The connecting assembly (2) includes two side connecting plates (23) arranged on both sides of the upper open rectangular sleeve (21) along the first direction. Each side connecting plate (23) has two connecting holes (25) arranged along the second direction. The two connecting shafts (51) of the walking trolley (5) are rotatably installed in the corresponding connecting holes (25).

7. The small-radius turning joint according to claim 6, characterized in that, The upper open rectangular sleeve (21) is provided with a locking block (22) on the outer surface along the second direction, and the two side connecting plates (23) are provided with a locking slot (24) in the middle, and the inner wall of the locking slot (24) fits with the outer wall of the locking block (22).

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