Deceleration structure with output end bearing bidirectional load

Abstract

The invention discloses a speed reduction structure with an output end bearing bidirectional load, which comprises an input gear shaft, a transmission gear, an output shaft, a box body, a bearing seat, a rotating bearing and a load bearing, the bearing seat is connected with the box body, and the input gear shaft is horizontally arranged in the bearing seat through the rotating bearing; the output shaft is vertically arranged in the box body through a rotating bearing and a load bearing, and the input gear shaft is connected with the output shaft through a transmission gear. The load bearing is arranged on the output shaft, the load bearing is connected with the output shaft and the box body, and the axial load borne by the output shaft is transmitted to the box body, so that the output shaft does not shift when bearing the axial load, meanwhile, the phenomenon that a meshing bevel gear structure is stuck is avoided, and the purpose that the load of the output bearing is loaded is achieved; and therefore, the speed reducing mechanism not only can bear radial load, but also can bear bidirectional load, and the use requirements under specific working conditions are met.

Description

Technical Field

[0001] The invention relates to the technical field of reducers, and in particular to a reduction gear structure with an output end bearing a bidirectional load. Background Art

[0002] The reduction mechanism plays the role of matching the rotational speed and transmitting the torque. Under normal circumstances, the output shaft of the reduction mechanism does not bear the axial force, but mainly bears the radial load. Therefore, the rotating structure of the output shaft is mostly supported by a pair of deep groove ball bearings; when the output shaft can bear the axial force, the rotating structure of the output shaft is mostly positioned by a pair of angular contact ball bearings or a pair of tapered roller bearings to realize the bearing of the axial load. However, the above structure has great structural safety hazards: when the output shaft is subjected to axial force, the angular contact ball bearing or tapered roller bearing on one side is compressed, and the preload of the angular contact ball bearing or tapered roller bearing on the other side is released. When the preload is released, its radial positioning accuracy will be affected, and the axis of the driving wheel and the axis of the driven wheel cannot maintain the original design requirements, which will inevitably cause the meshing area of ​​the two gears to change, and then affect the load-bearing capacity of the gears, and may cause risks such as gear tooth breakage; secondly, when the driven wheel is located on the driving wheel side, opposite to the axial load-bearing capacity of the output shaft, that is, the axial force is upward, and the driven wheel is located below the driving wheel, when the axial force is large, the driven wheel tends to move upward, which will inevitably reduce the tooth clearance between the driving wheel and the driven wheel, and may cause the gear to get stuck.

[0003] Therefore, the output shaft of the T-type reduction structure disclosed in the prior art, such as CN109677598A, generally cannot meet the requirement of bearing axial load. However, in actual applications, the output shaft of the T-type reduction structure needs to bear axial load in certain application environments. The present invention provides a reduction structure with an output end bearing bidirectional load to solve the above problem. Summary of the invention

[0004] The present invention provides a reduction structure with an output end bearing a bidirectional load. By changing the setting position of the transmission gear and the bearing arrangement on the output shaft, the output shaft can bear an axial load, thereby solving the technical problem of a T-type reduction mechanism bearing a bidirectional load.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A reduction structure with a bidirectional load at the output end, comprising an input gear shaft, a transmission gear, an output shaft, a housing, a bearing seat, a rotating bearing and a load bearing, wherein the bearing seat is connected to the housing, the input gear shaft is horizontally arranged in the bearing seat through a rotating bearing, the output shaft is vertically arranged in the housing through a rotating bearing and a load bearing, the rotating bearing is used for the rotation of the input gear shaft and the output shaft around the axis, the load bearing is used for bearing the axial load of the output shaft, the input gear shaft is connected to the output shaft through a transmission gear, and drives the output shaft to rotate.

[0006] Furthermore, a unloading ring platform is provided on the box body, the output shaft is arranged in the unloading ring platform, and the load bearing is located on the unloading ring platform.

[0007] Furthermore, the inner end of the input gear shaft is meshed with a transmission gear, and the transmission gear is located above the input gear shaft.

[0008] Furthermore, the load bearings are arranged in pairs, and are respectively located on the upper and lower sides of the unloading ring platform.

[0009] Furthermore, the input gear shaft and the output shaft are arranged perpendicular to each other, the axis of the input gear shaft and the axis of the output shaft intersect or are offset, when the axis of the input gear shaft and the axis of the output shaft intersect, the transmission gear is a bevel gear structure, when the axis of the input gear shaft and the axis of the output shaft are offset, the input gear shaft is a hypoid gear driving wheel, and the transmission gear is a hypoid gear driven wheel.

[0010] Furthermore, a locking nut is provided at the bottom end of the output shaft, and the output shaft is connected to the box body through the locking nut.

[0011] Furthermore, the rotating bearings on the input gear shaft are arranged in pairs, the two rotating bearings are arranged on the input gear shaft opposite to each other, and a spacer sleeve is arranged between the two rotating bearings.

[0012] Furthermore, the rotating bearing on the input gear shaft is a tapered bearing, and the rotating bearing on the output shaft is provided in two groups, the group located on the upper side is a deep groove ball bearing, and the group located on the lower side is a deep groove ball bearing or a cylindrical roller bearing.

[0013] Furthermore, a group of rotating bearings on the lower side of the output shaft is located above or below the load bearing, and a group of rotating bearings on the upper side of the output shaft is located above the load bearing.

[0014] The beneficial effects of the present invention are as follows: A load bearing is arranged on the output shaft, and the load bearing connects the output shaft and the housing, and transmits the axial load of the output shaft to the housing, so that the output shaft will not shift when bearing the axial load, and the meshing bevel gear structure will not be stuck, thereby achieving the purpose of loading the output bearing, and thus the reduction mechanism can not only bear radial loads, but also bidirectional loads, meeting the use requirements under specific working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the internal structure of the present invention; Figure 2 It is a schematic diagram of the structure of the input axis and the output axis offset setting of the present invention; Figure 3 This is a schematic diagram of the structure in which the input axis and the output axis intersect each other in the present invention.

[0016] Figure numerals: 1, input gear shaft; 2, transmission gear; 3, output shaft; 4, housing; 41, unloading ring; 5, bearing seat; 6, rotating bearing; 7, load bearing. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings of the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] like Figure 1 As shown, a reduction structure with a bidirectional load at the output end includes an input gear shaft 1, a transmission gear 2, an output shaft 3, a housing 4, a bearing seat 5, a rotating bearing 6 and a load bearing 7. The bearing seat 5 is connected to the housing 4. The input gear shaft 1 is horizontally arranged in the bearing seat 5 through the rotating bearing 6. The input gear shaft 1 is in a horizontal state in the bearing seat 5 and rotates around its own axis. The output shaft 3 is vertically arranged in the housing 4 through the rotating bearing 6 and the load bearing 7. The output shaft 3 is in a vertical state in the housing 4 and rotates around its own axis. The rotating bearing 6 is used for the self-rotation of the input gear shaft 1 and the output shaft 3. The load bearing 7 is used for bearing the axial load of the output shaft 3. The load bearing 7 connects the housing 4 and the output shaft 3. The input gear shaft 1 is connected to the output shaft 3 through the transmission gear 2 to drive the output shaft 3 to rotate.

[0020] like Figure 1As shown, in the specific transmission process of the present invention, the input gear shaft 1 serves as the input end, the power system is connected to the input gear shaft 1 through a coupling, the power is transmitted to the input gear shaft 1, the input gear shaft 1 is meshed with the transmission gear 2, and the deceleration function is realized through the set transmission ratio, the transmission gear 2 is connected to the output shaft 3 through a spline, and the power is transmitted to the output shaft 3, and the output shaft 3 outputs the rotation function outward through a coupling or a synchronous pulley or a gear. In the above transmission process, the rotation of the input gear shaft 1 is realized by the rotating bearing 6 arranged thereon. The input gear shaft 1 rotates in the bearing seat 5 through the rotating bearing 6, and then the inner end of the input gear shaft 1 meshes with the transmission gear 2, changing the rotation by 90° and outputting it through the output shaft 3. The output shaft 3 rotates in the housing 4 through the rotating bearing 6, and when bearing an axial load, the load is transferred to the housing 4 through the load bearing 7 arranged on the output shaft 3, thereby avoiding displacement of the output shaft 3, and thus not causing displacement of the transmission gear 2 arranged on the output shaft 3, and further not causing changes in the meshing clearance between the input gear shaft 1 and the transmission gear 2, and not causing the occurrence of gear jamming.

[0021] like Figure 1 As shown, the axial positioning and radial positioning of the output shaft 3 are independent and separately arranged, and its radial positioning is achieved by the rotating bearing 6, and the axial positioning is achieved by two load bearings 7 that are paired and arranged in opposite directions. When the output shaft 3 bears a vertical load, such as a large load in an upward direction, the load bearing 7 located below has a tendency to be compressed. At this time, the output shaft 3 and the transmission gear 2 thereon have an upward movement tendency, but the load bearing 7 is unloaded and the load is transferred to the housing 4, so that the output shaft 3 and the transmission gear 2 thereon do not shift, thereby avoiding the phenomenon of gear jamming; and even when the large load in the upward direction exceeds the limit, since the transmission gear 2 is located above the input gear shaft 1, even if the output shaft 3 and the transmission gear 2 thereon are displaced upward, it will only cause the gear tooth gap between the transmission gear 2 and the input gear shaft to increase, and the gear jamming will not occur. When a large load is applied downward, the load bearing 7 located above is used for unloading and load transfer before the load exceeds the limit. When the load exceeds the limit, the bottom end of the output shaft is supported on the box 4, so it will not be displaced, and the gear will not be stuck. The rotating bearing 6 ensures that the axis of the output shaft 3 remains unchanged, that is, the gear contact area will not change significantly, avoiding the problem of gear tooth breakage caused by changes in the force area. The above structure keeps the output shaft stable in both radial and axial directions, thereby avoiding structural damage.

[0022] like Figure 1As shown, further, a unloading ring platform 41 is provided on the box body 4, and a mounting hole is provided in the unloading ring platform 41. The output shaft 3 is arranged in the mounting hole in the unloading ring platform 41, and the load bearing 7 is located on the unloading ring platform 41; the load bearings 7 are arranged in pairs on the output shaft 3, and are respectively located on the upper and lower sides of the unloading ring platform 41, and the unloading ring platform 41 is clamped. When the output shaft 3 carries a load in a downward direction, the load bearing 7 located on the upper side plays a role in unloading and load transfer. When the output shaft 3 carries a load in an upward direction, the load bearing 7 located on the lower side plays a role in unloading and load transfer.

[0023] Furthermore, the inner end of the input gear shaft 1 is meshed with the transmission gear 2 , and the transmission gear 2 is located above the input gear shaft 1 .

[0024] like Figure 2 , 3 As shown, further, the input gear shaft 1 and the output shaft 3 are arranged perpendicular to each other, and the axis of the input gear shaft 1 and the axis of the output shaft 3 intersect or are offset; when they are arranged to intersect, the axis of the input gear shaft 1 and the axis of the output shaft 3 are perpendicular to each other and intersect, or they can intersect but not be perpendicular, at which time the transmission gear 2 is a bevel gear structure; when they are offset, the axis of the input gear shaft 1 and the axis of the output shaft 3 are perpendicular to each other but offset and do not intersect, the input gear shaft 1 and the transmission gear 2 form a quasi-hyperbolic gear structure, the input gear shaft 1 is a quasi-hyperbolic gear driving wheel, and the transmission gear 2 is a quasi-hyperbolic gear driven wheel.

[0025] Furthermore, a locking nut is provided at the bottom end of the output shaft 3, and the output shaft 3 is connected to the housing 4 through the locking nut. The locking nut axially fixes the output shaft 3 in the housing 4. The locking nut is provided at the bottom end of the output shaft 3, and cooperates with the limiting step on the structure of the output shaft 3 to tighten the rotating bearing 6 and the load bearing 7, thereby stabilizing the output shaft 3 in the housing 4.

[0026] Furthermore, the rotating bearings 6 on the input gear shaft 1 are arranged in pairs, and the two rotating bearings 6 are relatively arranged on the input gear shaft 1, and the rotating bearings 6 on the input gear shaft 1 are pre-tightened by a locking nut, and a spacer is provided between the two rotating bearings 6 to increase the rigidity of the input gear shaft 1.

[0027] Furthermore, the rotary bearing 6 on the input gear shaft 1 is a tapered bearing.

[0028] Furthermore, two groups of rotating bearings 6 are arranged on the output shaft 3. According to different structures and functions, the arrangement positions of the rotating bearings 6 on the output shaft 3 are different. The group of rotating bearings 6 located on the upper side is above the load bearing 7 and the transmission gear 2, and is a deep groove ball bearing. The group of rotating bearings 6 located on the lower side is below the transmission gear 2, and is arranged above or below the load bearing 7 according to different needs, and is a deep groove ball bearing or a cylindrical roller bearing.

[0029] Furthermore, the box body 4 is provided with an oil filling port and an oil discharge port, and oil plugs are installed on the oil filling port and the oil discharge port, and an oil mirror is provided on the side of the box body 4.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

Claims

1. A deceleration structure with a bidirectional load at the output end, characterized in that: The invention comprises an input gear shaft (1), a transmission gear (2), an output shaft (3), a housing (4), a bearing seat (5), a rotating bearing (6) and a load bearing (7), wherein the bearing seat (5) is connected to the housing (4), the input gear shaft (1) is horizontally arranged in the bearing seat (5) via the rotating bearing (6), the output shaft (3) is vertically arranged in the housing (4) via the rotating bearing (6) and the load bearing (7), the rotating bearing (6) is used for the input gear shaft (1) and the output shaft (3) to rotate around their axes, the load bearing (7) is used for bearing the axial load of the output shaft (3), and the input gear shaft (1) is connected to the output shaft (3) via the transmission gear (2) to drive the output shaft (3) to rotate.

2. According to claim 1, a deceleration structure with a bidirectional load at the output end, characterized in that: A unloading ring platform (41) is provided on the housing (4), the output shaft (3) is arranged in the unloading ring platform (41), and the load bearing (7) is located on the unloading ring platform (41).

3. The deceleration structure with bidirectional load at the output end according to claim 1 is characterized in that: The inner end of the input gear shaft (1) is meshed with a transmission gear (2), and the transmission gear (2) is located above the input gear shaft (1).

4. The deceleration structure with bidirectional load at the output end according to claim 2 is characterized in that: The load bearings (7) are arranged in pairs and are respectively located on the upper and lower sides of the unloading ring platform (41).

5. The deceleration structure with bidirectional load at the output end according to claim 1 is characterized in that: The input gear shaft (1) and the output shaft (3) are arranged perpendicular to each other, the axis of the input gear shaft (1) and the axis of the output shaft (3) intersect or are arranged offset, when the axis of the input gear shaft (1) and the axis of the output shaft (3) intersect, the transmission gear (2) is a bevel gear structure, when the axis of the input gear shaft (1) and the axis of the output shaft (3) are offset, the input gear shaft (1) is a hypoid gear driving wheel, and the transmission gear (2) is a hypoid gear driven wheel.

6. The deceleration structure with a bidirectional load at the output end according to claim 1 is characterized in that: A locking nut is provided at the bottom end of the output shaft (3), and the output shaft (3) is connected to the box body (4) via the locking nut.

7. The deceleration structure with bidirectional load at the output end according to claim 1 is characterized in that: The rotary bearings (6) on the input gear shaft (1) are arranged in pairs, the two rotary bearings (6) are arranged on the input gear shaft (1) opposite to each other, and a spacer sleeve is provided between the two rotary bearings (6).

8. The deceleration structure with bidirectional load at the output end according to claim 7 is characterized in that: The rotating bearing (6) on the input gear shaft (1) is a tapered bearing, and the rotating bearing (6) on the output shaft (3) is provided in two groups, the group located on the upper side is a deep groove ball bearing, and the group located on the lower side is a deep groove ball bearing or a cylindrical roller bearing.

9. A deceleration structure with a bidirectional load at the output end according to claim 8, characterized in that: A group of rotating bearings (6) located on the lower side of the output shaft (3) is located above or below the load bearing (7), and a group of rotating bearings (6) located on the upper side of the output shaft (3) is located above the load bearing (7).

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