CN218863213U

CN218863213U - Transmission gear box and lifting column and office table comprising same

Info

Publication number: CN218863213U
Application number: CN202221853484.0U
Authority: CN
Inventors: 王克敏
Original assignee: Changzhou Huizhi Electric Appliance Co ltd
Current assignee: Changzhou Huizhi Electric Appliance Co ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2023-04-14
Anticipated expiration: 2032-07-19

Abstract

The utility model belongs to the technical field of the desk, concretely relates to transmission gear box and contain lift post, desk of this transmission gear box, including box, power shaft, transmission shaft, a serial communication port, be equipped with first helical gear, second helical gear in the box, first helical gear is equipped with first helical gear, and the second helical gear is equipped with second helical gear, and the axis mutually perpendicular of first helical gear, second helical gear, first helical gear and second helical gear keep meshing, the power shaft pierces through in the first shaft hole that the box runs through to first helical gear axle center department, and first shaft hole department is equipped with the first locking mechanical system that makes first helical gear and power shaft synchronous rotation, the transmission shaft pierces through in the second shaft hole that the box runs through to the second helical gear, and second shaft hole department is equipped with the second locking mechanical system that makes second helical gear transmission shaft synchronous rotation, the utility model discloses a noise when crisscross gear's structure can effectively reduce the operation improves and uses experience.

Description

Transmission gear box and lifting column and office table comprising same

Technical Field

The utility model belongs to the technical field of the desk, concretely relates to transmission gear box and contain this transmission gear box's lift post, desk.

Background

The desk of liftable is a common office furniture, and the lift of desk needs the lift post, and general lift post adopts lead screw elevation structure, for guaranteeing both sides lead screw elevation structure's synchronous operation, needs to adopt gear box synchronous drive, and adopts metal gear in the current gear box, and the striking sound of tooth is big in the operation, and the noise that leads to the operation is big, influences the customer and uses the impression to still improve production's cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem to above-mentioned defect, provide a drive gear box and contain this drive gear box's lift post, desk, the utility model discloses a noise when the structure of crisscross gear can effectively reduce the operation improves and uses experience.

The utility model provides a technical scheme that its technical problem adopted as follows:

the utility model provides a transmission gear box, includes plastic's box, power shaft, transmission shaft, its characterized in that, be equipped with first helical gear, the second helical gear of plastics in the box, first helical gear is equipped with first spiral tooth, and the second helical gear is equipped with second spiral tooth, and the axis mutually perpendicular of first helical gear, second helical gear, first spiral tooth and second spiral tooth keep meshing, the power shaft pierces through the box and runs through to the first shaft hole of first helical gear axle center department, and first shaft hole department is equipped with the first locking mechanism that makes first helical gear and power shaft synchronous rotation, the transmission shaft pierces through the box and runs through to the second shaft hole of second helical gear, and second shaft hole department is equipped with the second locking mechanism that makes second gear transmission shaft synchronous rotation.

Furthermore, the two ends of the first helical gear are provided with first positioning bosses, the outer sides of the first positioning bosses are provided with first assembling bosses, the first positioning bosses and the first shaft hole are coaxial, the outer diameters of the first positioning bosses are larger than those of the first assembling bosses and smaller than those of the first helical gear, a first assembling cavity for accommodating the first assembling bosses is formed in the box body, the first assembling bosses are rotatably matched with the first assembling cavity, and the end faces of the first positioning bosses are abutted to the inner wall of the cavity to position the axial positions of the first helical gear.

Furthermore, an assembly groove is formed in the box body at the insertion position of the transmission shaft, an assembly bearing is arranged in the assembly groove, the assembly bearing is sleeved on the transmission shaft, a positioning mechanism for locking the axial position of the assembly bearing on the transmission shaft is arranged on the transmission shaft, a cover plate for limiting the assembly bearing in the assembly groove is arranged at the assembly groove on the box body, and a through hole for the transmission shaft to penetrate through is formed in the cover plate.

Furthermore, second positioning bosses are arranged at two ends of the second bevel gear, a second assembling boss is arranged on the outer side of the second positioning boss, the outer diameter of the second assembling boss is smaller than that of the second positioning boss, the outer diameter of the second positioning boss is smaller than that of the second bevel gear, a second bearing is sleeved at the second positioning boss, a bearing groove for accommodating the second bearing is formed in the corresponding position in the box, and the outer end face of the second bearing is abutted against the side wall of the bearing groove to axially position the second bevel gear.

Furthermore, the box body is of a splicing structure formed by splicing the box body A and the box body B, and the box body A and the box body B are connected and locked through axially arranged screws.

Further, the first shaft hole is a polygonal hole.

Furthermore, the transmission shaft is a screw rod, an assembly section matched with the assembly bearing is arranged on the screw rod, the outer diameter of the assembly section is smaller than that of the screw rod, a step surface for limiting the assembly bearing is formed between the assembly section and the screw rod, a snap spring is arranged on the inner side of the assembly bearing on the screw rod, and the step surface and the snap spring form the positioning mechanism.

Furthermore, the second shaft hole is a polygonal hole, and a polygonal connecting section matched with the second shaft hole in structure is arranged on the transmission shaft.

Further, the apron passes through fastening screw and is connected with the box, and the cover is equipped with the cooperation circle on the transmission shaft in the apron outside, and the department of correspondence is equipped with the cooperation section of assembly cooperation circle on the transmission shaft, and cooperation section department external diameter is less than the transmission shaft external diameter, joins in marriage the stage and forms cooperation step face between the transmission shaft, and cooperation circle both sides terminal surface is contradicted respectively on cooperation step face, on the apron.

Furthermore, the first helical gear is provided with a first left-handed helical gear, the second helical gear is provided with a second left-handed helical gear, and the first helical gear and the second helical gear are kept meshed.

The utility model has the advantages that: adopt above-mentioned scheme, the first helical gear of plastic system of injection moulding has been adopted, the second helical gear, the noise when adopting staggered gear's structure can effectively reduce the operation, first helical gear, the tooth meshing rotation through the spiral between the second helical gear, better cushioning nature has, the noise of operation is little, effort between the tooth is decomposed, the atress on the tooth has been reduced, protection tooth, increase of service life, further noise reduction, compare current metal gear, the cost reduces by a wide margin, first helical gear, the second helical gear is stabilized positioning in the box, axial float when avoiding the transmission, stable in structure, the result of use is showing, the improvement is experienced in the use when using the desk.

Drawings

The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the utility model after the box body a is hidden.

Fig. 3 is a schematic cross-sectional view of a box body according to an embodiment of the present invention.

Fig. 4 is a schematic partial cross-sectional view of a transmission shaft according to an embodiment of the present invention.

Fig. 5 is a schematic cross-sectional view of a lifting column according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a box body in an embodiment of the present invention.

Wherein: the structure comprises a box body 1, a through hole 11, a first assembly cavity 12, a bearing groove 13, an assembly groove 14, a first bevel gear 2, a first shaft hole 21, a first positioning boss 22, a first assembly boss 23, a second bevel gear 3, a second shaft hole 31, a second positioning boss 32, a second assembly boss 33, a transmission shaft 4, an assembly section 41, a matching section 42, a second bearing 5, an assembly bearing 6, an inner pipe 7, an outer pipe 8 and a screw nut 9.

Detailed Description

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

Referring to fig. 1 and 2, a transmission gear box includes a plastic box 1, a first helical gear 2 and a second helical gear 3 are arranged in the box 1, the first helical gear 2 and the second helical gear 3 are both plastic parts, the first helical gear 2 is provided with a left-handed first helical gear, the second helical gear 3 is provided with a left-handed second helical gear, the first helical gear and the second helical gear are meshed, axes of the first helical gear 2 and the second helical gear 3 are perpendicular to each other, a hexagonal first shaft hole 21 is arranged at an axis of the first helical gear 2, a hexagonal second shaft hole 31 is arranged at an axis of the second helical gear 3, a through hole 11 communicated with the first shaft hole 21 is arranged at a position corresponding to the first shaft hole 21 on the box 1, a power shaft (not shown in the figure) penetrates through the box from the through hole 11 and penetrates into the first shaft hole 21, the power shaft is of a hexagonal structure matched with the first shaft hole 21, torque of an external driving mechanism is input to the first helical gear 2 through the power shaft, the power shaft drives the first helical gear 2 to synchronously rotate, the transmission shaft 1 is provided with a transmission shaft 4 outputting power outwards, one end of the transmission shaft 4 is connected with the hexagonal second helical gear 31, and the second helical gear is connected with the end of the hexagonal shaft at a section of the second helical gear.

The working principle is as follows: the torque input by the power shaft drives the first helical gear 2 in the box body 1 to synchronously rotate with the first helical gear 2, the first helical gear 2 drives the second helical gear 3 which is meshed with the first helical gear to synchronously rotate, the second helical gear 3 outputs the torque to the transmission shaft 4, and the torque is converted from the power shaft to the transmission shaft 4 in the twisting direction.

Referring to fig. 2 and 3, the case 1 has a first groove for accommodating the first helical gear 2 and a second groove for accommodating the second helical gear 3, the first groove and the second groove are perpendicular to each other, the first helical gear and the second helical gear are engaged at a joint of the first groove and the second groove, the first helical gear 2 has first positioning bosses 22 at both ends thereof, a first assembling boss 23 is provided at an outer side of the first positioning boss 22, the first assembling boss 23 and the first positioning boss 22 are coaxial with the first axial hole 21, an outer diameter of the first positioning boss 22 is larger than the first assembling boss 23 and smaller than an outer diameter of the first helical gear 2, a radial length of the first positioning boss 21 is smaller, an end face of the first positioning boss 22 abuts against an inner side of the first groove for axially positioning the first helical gear 2, the position of the first helical gear 2 in the box body 1 is stable, referring to fig. 6, a first assembly cavity 12 structurally matched with the first assembly boss 23 is arranged at two sides of the first groove on the box body 1, the first assembly boss 23 is rotatably matched with the first assembly cavity 12, the rotatability of the first helical gear 2 is realized, the through hole 11 is communicated with and coaxial with the first assembly cavity 12, the first assembly boss 23 and the first positioning boss 22 are arranged, so that the first helical gear 2 has reliable positioning capability and rotatable capability in the box body 1, the running stability is improved, meanwhile, the axial length of the first helical gear 2 is normal, the connection length with a power shaft is increased, the transmission stability is improved, and for enhancing the rotatability of the first helical gear 2, a bearing or other rotation matching parts can be arranged at the first assembly boss 23.

The two ends of the second helical gear 3 are provided with second positioning bosses 32, the outer sides of the second positioning bosses 32 are provided with second assembling bosses 33, the outer diameters of the second assembling bosses 33 are smaller than the outer diameters of the second positioning bosses 32, the outer diameters of the second positioning bosses 32 are smaller than the outer diameters of the second helical gear 3, the axial length of the second positioning bosses 3 is smaller than the length of the second assembling bosses 33, the second bearings 5 are sleeved at the second assembling bosses 33, bearing grooves 13 for accommodating the second bearings 5 are formed in the corresponding positions in the box body 1, the bearing grooves 13 are communicated with the second grooves, the inner side end faces of the inner rings of the second bearings 5 are abutted against the end faces of the second positioning bosses 32, the outer side end faces of the outer rings of the second bearings 5 are abutted against the side walls of the bearing grooves 13 to achieve axial positioning of the second helical gear 3, the second positioning bosses 232 are arranged to be matched with the second bearings 5 to achieve axial position limitation of the second helical gear 3, the second bearings 5 are convenient to arrange, the inner end of the transmission shaft 4 is inserted into the second shaft hole 31 to be matched with the structure of the second helical gear 3, and the transmission shaft 4 can drive the transmission shaft to synchronously rotate.

Referring to fig. 4, an assembly groove 14 is provided at the insertion position of the transmission shaft 4 on the box body 1, an assembly bearing 6 is provided in the assembly groove 14, the inner ring of the assembly bearing 6 is sleeved on the transmission shaft 4, an assembly section 41 for installing the assembly bearing 6 in a matching manner is provided on the transmission shaft 4, a matching section 42 is provided at the outer side of the assembly section 41, the outer diameter of the assembly section 41 is smaller than the outer diameter of the matching section 42, the outer end surface of the inner end of the assembly bearing 6 is abutted against the step surface between the assembly section 41 and the matching section 42, a snap spring (not shown in the figure) is provided at the inner end of the assembly bearing 6 on the assembly section 41 and clings to the inner end surface of the inner ring of the assembly bearing 6, correspondingly, a snap spring groove is provided at the position, the assembly bearing 6 is stably fixed on the transmission shaft 4, a cover plate 10 is provided at the assembly groove 14 on the box body 4, the cover plate 10 is connected with the box body 1 through a screw, a through hole for the transmission shaft 4 to pass through is provided on the cover plate 10, the assembly bearing 6 is limited in the assembly groove 14, the assembly bearing 6, the transmission shaft 4 is reliably connected with the box body 1, the transmission shaft 4, the stable relation of the transmission shaft 4 and the box body 1 is stable, the structure is convenient for assembly and maintenance,

42 department covers of cooperation section of transmission shaft 4 is equipped with

cooperation circle

100, 42 external diameters of department of cooperation section are less than the external diameter of transmission shaft 4, it forms the cooperation step face to join in marriage stage 42 outer, the both sides terminal surface of cooperation circle 42 is contradicted respectively on the cooperation step face, on the apron 10, it is spacing to set up cooperation circle 100 and carry out the axial to apron 10, and simultaneously, the cooperation of the transmission shaft 4 of being convenient for and apron 10 can be sealed through-hole department, improve transmission shaft 4 and apron 10, 1 complex axiality of box.

The box 1 is a splicing structure formed by splicing the box A and the box B, and the box A and the box B are connected and locked through the axially arranged screws, so that the structure is convenient for production and assembly of the transmission case, improves the production efficiency and is convenient for maintenance and operation.

The utility model provides a lifting column, refer to fig. 5, including inner tube 7, the cover is established at the outside outer tube 8 of inner tube 7, box 1 is fixed at the top end of outer tube 8, inner tube 7, outer tube 8 all adopts square pipe, high in structural strength, and more pleasing to the eye, be equipped with the connecting plate with 8 top end connection of outer tube on the box 1, be equipped with even board 71 on the inner tube 7, be equipped with screw nut 9 on even board 71, screw nut 9 and even board 71 rotatable fit, screw nut 9 and lead screw thread fit, transmission shaft 4 rotates, make screw nut 9 reciprocate to the removal on transmission shaft 4, promote in inner tube 7 stretches out or the retraction outer tube 8, realize going up and down.

The utility model provides an office table, including the table, the crossbeam, the longeron, driving motor and transmission axle, contain two foretell lift stands, the crossbeam, the longeron sets up the support that constitutes the support table bottom, concretely speaking, two crossbeams set up the support that constitutes the I shape at the both ends of longeron, two lift stands are discrete in the support bottom left and right sides, driving motor fixes on the top of outer tube 8, the top of outer tube 8 is equipped with the motor board of connecting driving motor, outer tube 8 is connected in longeron and crossbeam department of meeting, connection structure is firm, the bottom of inner tube 7 is connected with the stabilizer blade, the both ends of transmission axle extend respectively to in the first shaft hole 21 of the first helical gear 2 in both sides, driving motor's worm wheel department is equipped with a shaft hole, the transmission axle passes by shaft hole department, driving motor's worm wheel drives the transmission axle and rotates, thereby realize the lift of two lift stands, realize the lift adjustment of table, moreover, the steam generator is simple structure, strong support nature, importantly, noise when operation is little, the result of use is showing has been improved.

The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the techniques of the present invention are substantially any simple modification and equivalent changes to the above embodiments, all falling within the protection scope of the present invention.

Claims

1. The utility model provides a transmission gear box, includes plastic's box, power shaft, transmission shaft, its characterized in that, be equipped with first helical gear, the second helical gear of plastics in the box, first helical gear is equipped with first spiral tooth, and the second helical gear is equipped with second spiral tooth, and the axis mutually perpendicular of first helical gear, second helical gear, first spiral tooth and second spiral tooth keep meshing, the power shaft pierces through the box and runs through to the first shaft hole of first helical gear axle center department, and first shaft hole department is equipped with the first locking mechanism that makes first helical gear and power shaft synchronous rotation, the transmission shaft pierces through the box and runs through to the second shaft hole of second helical gear, and second shaft hole department is equipped with the second locking mechanism that makes second gear transmission shaft synchronous rotation.

2. The transmission gearbox as claimed in claim 1, wherein the first bevel gear has first positioning bosses at both ends thereof, first assembling bosses are provided at outer sides of the first positioning bosses, the first assembling bosses and the first positioning bosses are coaxial with the first shaft hole, the first positioning bosses have outer diameters larger than and smaller than those of the first bevel gear, the casing has a first assembling cavity for accommodating the first assembling bosses, the first assembling bosses are rotatably fitted with the first assembling cavity, end faces of the first positioning bosses abut against an inner wall of the casing to position an axial position of the first bevel gear, the first shaft hole is a polygonal hole, the first shaft hole constitutes the first locking mechanism, and the power shaft is provided with a polygonal structure fitted with the first shaft hole.

3. The transmission gearbox as claimed in claim 1, wherein the casing has an assembly groove at the insertion position of the transmission shaft, the assembly groove has an assembly bearing, the assembly bearing is sleeved on the transmission shaft, the transmission shaft has a clamp spring for locking the axial position of the assembly bearing on the transmission shaft, the casing has a cover plate at the assembly groove for limiting the assembly bearing in the assembly groove, and the cover plate has a through hole for the transmission shaft to pass through.

4. The transmission gearbox according to claim 1, wherein the two ends of the second helical gear are provided with second positioning bosses, the outer sides of the second positioning bosses are provided with second assembling bosses, the outer diameters of the second assembling bosses are smaller than the outer diameters of the second positioning bosses, the outer diameters of the second positioning bosses are smaller than the outer diameters of the second helical gear, the second positioning bosses are sleeved with second bearings, bearing grooves for accommodating the second bearings are arranged at corresponding positions in the box body, the outer end faces of the second bearings abut against the side walls of the bearing grooves to axially position the second helical gear, the second shaft holes are polygonal holes, the transmission shaft is provided with polygonal connecting sections matched with the second shaft hole in structure, and the second shaft holes of the polygonal holes form the second locking mechanism.

5. The transmission gearbox as claimed in claim 1, wherein the casing is a split structure formed by splitting the casing body A and the casing body B, and the casing body A and the casing body B are connected and locked by axially arranged screws.

6. The transmission gearbox as claimed in claim 3, wherein the cover plate is connected to the casing through a fastening screw, a fitting ring is sleeved on the transmission shaft outside the cover plate, a fitting section for fitting the fitting ring is provided at a corresponding position on the transmission shaft, the outer diameter of the fitting section is smaller than that of the transmission shaft, a fitting step surface is formed between the fitting section and the transmission shaft, and end surfaces of two sides of the fitting ring are respectively abutted against the fitting step surface and the cover plate.

7. The transmission gearbox according to claim 3, wherein the transmission shaft is provided with an assembling section for fitting and assembling a bearing, the outer diameter of the rotating and assembling section is smaller than that of the screw rod, a step surface for limiting and assembling the bearing is formed between the assembling section and the screw rod, and the step surface and the clamp spring respectively abut against two sides of the assembling bearing.

8. The utility model provides a lift stand which characterized in that: the transmission gear box comprises the transmission gear box body according to any one of claims 1 to 7, and further comprises an inner tube and an outer tube sleeved outside the inner tube, the box body is fixed at the end part of the outer end, the transmission shaft is a screw rod, a screw nut is arranged on the inner tube, and the screw nut is in threaded fit with the screw rod.

9. The utility model provides an office table, includes table, crossbeam, longeron, driving motor and transmission axle, its characterized in that: the table comprises a table top, two lifting columns, a transverse beam, a longitudinal beam, a support, a driving motor, a transmission shaft and a support leg, wherein the transverse beam and the longitudinal beam are arranged at the bottom of the table top to form a support for supporting the table, the two lifting columns are separately arranged at the left side and the right side of the bottom of the support, the top ends of outer pipes of the lifting columns are connected with the support, the bottom end of the inner pipe is connected with the support leg, the driving motor is fixed at the top end of one of the outer pipes, two ends of the transmission shaft respectively extend into first shaft holes of first bevel gears at two sides, the driving motor is fixed at the top of one of the outer pipes, and the transmission shaft is connected with a worm wheel shaft of the driving motor.