Speed reducer with housing
By setting an oil pump and a valve between the lower part of the housing of the reducer and the upper part, the problem of insufficient lubrication when the reducer is restarted is solved, and the effect of timely oil supply and lubrication when the reducer is restarted is achieved.
Patent Information
- Application Number
- CN202311623561.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-30
- Publication Date
- 2025-05-30
AI Technical Summary
When the existing reducer is restarted, it may be insufficient lubrication due to the emptied oil pipe, which will affect the normal operation of the equipment.
A reducer with a housing is designed, by providing an oil pump and a valve between the lower and upper parts of the housing to ensure that the oil pipe is prevented from being emptied when the reducer is stopped, and oil is supplied and lubricated in time when restarting.
It effectively prevents the oil pipe from being drained when the reducer stops, ensures that the oil pump can supply oil immediately when restarted, ensures timely lubrication of lubricating components, and extends the service life of the equipment.
Smart Images
Figure CN120062333A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a speed reducer having a housing. Background Art
[0002] As is well known, speed reducers have components that require lubrication, such as bearings or the meshing areas of tooth parts. Summary of the Invention
[0003] Therefore, the object of the present invention is to improve a speed reducer, wherein lubrication should be ensured even when the speed reducer is restarted.
[0004] According to the present invention, this object is achieved in a speed reducer having the features given in claim 1.
[0005] In the case of a speed reducer having a housing, an important feature of the present invention is that the housing has a lower part and an upper part placed on the lower part,
[0006] wherein an oil pump driven by the input shaft of the speed reducer, in particular an end pump, sucks oil from the inside of the speed reducer via an oil pipe and a valve,
[0007] wherein the valve is arranged below the oil level, in particular in the direction of gravity,
[0008] wherein the oil pump is arranged above the oil level, in particular in the direction of gravity.
[0009] The advantage here is that when the speed reducer is in a stopped state, the valve can be used to prevent the oil pipe from emptying. Thus, when the speed reducer is restarted, the oil pump is supplied with oil, and thus oil can be immediately conveyed, whereby the components that need to be lubricated can be supplied with oil as soon as possible.
[0010] In an advantageous design, the valve is a one-way valve, in particular a check valve. The advantage here is that when the speed reducer is in a stopped state, the oil pipe can be prevented from emptying, so that when the speed reducer is restarted, lubrication can be restored as soon as possible.
[0011] In an advantageous design, the rotational axis of the input shaft is arranged in the interface, in particular the separation surface, between the upper part and the lower part,
[0012] In particular, wherein the first half of the bearing receiving part of the bearing of the input shaft is formed in the lower part, and the other half of the bearing receiving part of the bearing is formed in the upper part. The advantage here is that the bearing to be lubricated is located at the height of the interface, so that the oil pump located in the interface only needs to apply a small pumping power to lubricate the bearing.
[0013] In an advantageous design, the interface intersects the spatial region occupied by the oil pump. The advantage here is that the oil pump only needs to apply a small pumping power to ensure the lubrication of the components to be lubricated located within the interface.
[0014] In an advantageous design, the oil pipe extends from the oil pump to the valve, and the valve is connected in an oil-tight manner, in particular directly or via a connecting pipe extending into the notch, to the notch penetrating the wall of the lower component. The advantage here is that the oil pipe is arranged outside the housing, so that the conveyed oil is cooled by the ambient air. In addition, the emptying of the oil pipe can be prevented, so that when the speed reducer is restarted, the cooled oil can be immediately provided for lubrication.
[0015] In an advantageous design, the oil pipe is configured in a meandering manner. The advantage here is that the cooling effect can be increased by lengthening the oil pipe. This is because the oil pipe is arranged outside the speed reducer and is preferably spaced apart from the surface of the speed reducer. Thereby, an effective cooling effect can be achieved.
[0016] In an advantageous design, the oil pipe is connected to the suction connection of the oil pump, in particular to the inlet of the oil pump.
[0017] Wherein, a transparent area and / or a sensor for detecting oil is arranged on the suction connection. The advantage here is that the transparent area serves as an observation window, so that the oil level in the oil pipe can be monitored. Thereby, it can be easily detected whether the oil pipe is empty. Alternatively or additionally, a sensor that can perform this monitoring automatically can be used.
[0018] In an advantageous design, a further oil pipe extends from the pressure connection, in particular the outlet, of the oil pump to a further notch penetrating the wall of the upper component. The advantage here is that the further notch can be arranged directly above the notch of the lower component without lateral misalignment, whereby as large a toothed component as possible can be non-rotatably connected to the input shaft, or whereby the largest possible spacing is achieved between the two notches and the toothed component non-rotatably connected to the input shaft, whereby the interference of the high-speed rotating toothed component on the oil conveyance is minimized.
[0019] In an advantageous design, the valve has a sleeve.
[0020] In particular, the sleeve is screwed onto the connecting pipe and is connected in an oil-tight manner in particular. The advantage here is that the valve can be reliably and oil-tightly connected to the speed reducer. Here, the sleeve serves as a housing for the components arranged inside the sleeve.
[0021] In an advantageous design, the valve has a tappet that extends through a first opening arranged centrally in the ring component and is guided in the first opening, in particular wherein the first opening serves as a sliding bearing. The advantage here is that the tappet can move back and forth in the axial direction (i.e., in the direction of the ring axis of the ring component).
[0022] In an advantageous design, the ring part is connected to the sleeve, in particular in an oil-tight manner and in particular detachably. In particular, the ring part is screwed with its external teeth into the internal teeth of the sleeve. The advantage here is that the ring part is fixed in the sleeve.
[0023] In an advantageous design, the ring part has additional openings which are spaced apart from one another in the circumferential direction with respect to the ring axis. The advantage here is that the additional openings enable the flow-through of oil.
[0024] In an advantageous design, the tappet has a widened tappet head which, when the tappet head abuts against the ring part, covers the additional openings, in particular in an oil-tight manner.
[0025] Here, the additional openings are radially spaced apart from the first opening. In particular, the radial range covered by the first opening - with respect to the ring axis - is spaced apart from the radial range covered by the additional openings. The advantage here is that the oil flow can only be released by a corresponding axial positioning of the tappet.
[0026] In an advantageous design, a spring element supported on the ring part presses against a support ring which abuts against a retaining ring. Here, the retaining ring is inserted into an annular groove of the tappet, in particular such that the tappet head - in particular in an oil-tight manner - covers the additional openings. The advantage here is that if the oil pump does not have a suction pressure, the widened tappet head closes the additional openings and thus prevents the flow-through of oil through the ring part. However, if the suction pressure overcomes the spring force generated by the spring element, the flow-through of oil can be achieved.
[0027] In an advantageous design, a further retaining ring is inserted into an internal groove of the sleeve. The further retaining ring - in particular in the direction of the ring axis of the ring part - limits the tappet. The advantage here is that the tappet can move back and forth between a stop on the ring part of the tappet head and a stop on the further retaining ring.
[0028] Further advantages are given by the dependent claims. The invention is not limited to the feature combinations of the claims. For a person skilled in the art, other reasonable combination possibilities of the claims and / or single claim features and / or features of the description and / or features of the drawings can be obtained, in particular from the object set and / or by comparison with the prior art. Description of the Drawings
[0029] The invention is described in detail below with reference to the drawings:
[0030] Figure 1 The speed reducer according to the invention is shown in an axonometric view;
[0031] Figure 2 The speed reducer is shown in a side view;
[0032] Figure 3 Shows the positions of the oil pump 2 and the valve 1 relative to the oil level 30;
[0033] Figure 4 Is shown in a perspective view Figure 3 of the position;
[0034] Figure 5 The valve 1 is shown disassembled in a perspective view;
[0035] Figure 6 Shows a cross-section of the valve 1.
[0036] List of reference numerals:
[0037] 1 Valve, in particular a non-return valve
[0038] 2 Oil pump
[0039] 3 Lower part
[0040] 4 Upper part
[0041] 5 Output shaft
[0042] 20 Input shaft
[0043] 30 Oil level
[0044] 51 Sleeve
[0045] 52 Retaining ring
[0046] 53 Tappet
[0047] 54 Ring part
[0048] 55 Spring element, in particular an annular spring
[0049] 56 Support ring
[0050] 57 Retaining ring Detailed description
[0051] As shown in the drawings, the speed reducer has a housing which has a lower part 3 and an upper part 4 placed on the lower part 3. Thus, the speed reducer is preferably designed to have a split housing as the housing.
[0052] The interface between the lower part 3 and the upper part 4, in particular the separating surface, i.e. the contact surface of the two parts, also includes the rotational axes of the input shaft 20 and the output shaft 5 of the speed reducer.
[0053] The lower part 3 is partially filled with oil and is set on a horizontal plane. Thus, the oil level 30 is arranged below the interface.
[0054] The bearing receiving portion of the corresponding bearing is bisected from the input plane. Thus, one half of each bearing is received in the lower part 3 and the other half is received in the upper part 4.
[0055] The oil pump 2 is preferably driven by the input shaft 20. Since the input shaft 20 is the fastest rotating shaft of the speed reducer, the oil pump 2 achieves a high supply rate.
[0056] The oil pump 2 is located above the oil level 30. The oil pump is divided by a dividing surface and sucks oil via an oil pipe in which a valve 1, in particular a check valve, in particular a non-return valve, is arranged, and the oil pipe passes through the wall of the lower part 4 into the oil sump of the speed reducer. For this purpose, the wall of the lower part 4 has a through notch.
[0057] The valve 1 is arranged below the oil level 30. The valve 1 is preferably arranged at the height of the notch. In particular, the central axis of the notch intersects the valve 1.
[0058] In particular, the area covered by the valve in the vertical direction overlaps with the area covered by the notch in the vertical direction.
[0059] The area covered by the oil pump 2 in the vertical direction overlaps with the area covered by the input shaft 20 in the vertical direction.
[0060] However, preferably, the valve 1 is not arranged directly below the oil pump 2, but on the side of the input shaft 20 away from the output shaft in the transverse direction, where the transverse direction is parallel to the dividing surface and perpendicular to the axis of rotation of the input shaft 20.
[0061] Due to the action of the valve 1, the oil pipe is not emptied even when the input shaft 20 stops. Therefore, when the input shaft 20 is restarted subsequently, the oil pump 2 can suck oil in the suction area without having to suck air.
[0062] The oil conveyed by the oil pump 2 is preferably guided through an additional oil pipe, which enters the internal space of the speed reducer through an additional notch in the upper part 4.
[0063] As Figure 5 and Figure 6 shown, the valve 1 has a sleeve 51 which has a connection portion for the oil pipe and is connected to the oil pipe. The sleeve 51 is connected to the lower part 3 at its other end such that oil can flow into the valve through the notch of the lower part 3.
[0064] A retaining ring 52 is received in the sleeve 51. The sleeve 51 has a first opening arranged centrally therethrough, and a tappet 53 passes through this opening and is guided, in particular guided parallel to the ring axis, during its linear reciprocating motion.
[0065] Another opening through the retaining ring 52 is radially spaced from the first opening with respect to the ring axis of the retaining ring 52.
[0066] The tappet 53 is restricted on one side during its reciprocating motion by a snap ring 54 because the widened head on the tappet 53 abuts against the snap ring 52, and thereby covers another opening in an oil-impermeable manner, and on the other side, it is restricted by the snap ring 52 received in the sleeve 51, but this snap ring does not provide an oil-impermeable stop. In particular, in the latter case, oil can circulate around the tappet head within the sleeve 51.
[0067] On the tappet 53, a snap ring 57 is clamped in an annular groove of the tappet 53, and a support ring 56 abuts against the tappet 53, and the support ring 56 has an outer diameter larger than that of the snap ring 57.
[0068] A spring member, in particular an annular spring / helical spring, sleeved on the tappet is supported on the snap ring 57 and, on the other hand, presses against the support ring 56.
[0069] In this way, as long as the suction pressure of the oil pump is not large enough to cause the tappet head of the tappet 53 to be pushed away from the snap ring 57 against the spring force generated by the spring member 55, and thus in particular to cause the valve to release the oil flow, the widened tappet head of the tappet 53 is pressed against the snap ring 57, thereby closing another opening in the snap ring 57.
[0070] Preferably, the additional notch in the upper part 4 is vertically arranged directly above the notch in the lower part 3, in particular without lateral misalignment or misalignment in the transverse direction. In this way, a large gear can be connected to the input shaft 20 in a non-rotatable relative manner without disturbing the oil flow into and out of the internal space of the speed reducer.
[0071] The viewing window is preferably arranged in the oil pipe, in particular adjacent to or immediately adjacent to the oil pump, in particular on the suction connection of the oil pump. In this way, the function of the valve 1 can be checked when the input shaft 20 is stopped. Alternatively or additionally, an oil detection sensor can also be arranged on the oil pipe in the area of the suction connection of the oil pump and / or on the oil pipe adjacent to or immediately adjacent to the oil pump 2. In this way, the sensor signal can be transmitted to the controller, which indicates and / or reports an alarm signal in case of oil shortage, thereby indirectly monitoring the function of the valve 1.
[0072] In a further embodiment according to the invention, the oil pipe is designed to extend meanderingly from the notch of the lower part 3 to the oil pump 2. In this way, a cooling effect can be achieved.
Claims
1. A speed reducer having a housing, The housing has a lower part and an upper part placed on the lower part, An oil pump driven by the input shaft of the speed reducer, especially an end pump, sucks oil from inside the speed reducer via an oil pipe and a valve, It is characterized in that, The valve - especially in the direction of gravity - is arranged below the oil level, The oil pump - especially in the direction of gravity - is arranged above the oil level.
2. The speed reducer according to claim 1, It is characterized in that, The valve is a one-way valve, especially a check valve.
3. The speed reducer according to any one of the preceding claims, It is characterized in that, The rotational axis of the input shaft is arranged in the interface, especially the separation surface, between the upper part and the lower part, In particular, the first half of the bearing receiving part of the bearing of the input shaft is constructed in the lower part, and the other half of the bearing receiving part of this bearing is constructed in the upper part.
4. The speed reducer according to any one of the preceding claims, It is characterized in that, The interface intersects the space area occupied by the oil pump.
5. The speed reducer according to any one of the preceding claims, It is characterized in that, The oil pipe extends from the oil pump to the valve, and the valve is connected in an oil-tight manner, especially directly or via a pipe extending into the notch, to the notch penetrating the wall of the lower part.
6. The speed reducer according to any one of the preceding claims, It is characterized in that, The oil pipe is constructed in a meandering manner.
7. The speed reducer according to any one of the preceding claims, It is characterized in that, The oil pipe is connected to the suction connection part of the oil pump, especially to the inlet of the oil pump, A transparent area and / or a sensor for detecting oil are arranged on the suction connection part.
8. The speed reducer according to any one of the preceding claims, It is characterized in that, Another oil pipe extends from the pressure connection part, especially the outlet, of the oil pump to the other notch penetrating the wall of the upper part.
9. The speed reducer according to any one of the preceding claims, It is characterized in that, The valve has a sleeve, In particular, the sleeve is screwed onto the pipe, especially in an oil-tight connection here.
10. The speed reducer according to any one of the preceding claims, It is characterized in that, The valve has a tappet, and the tappet passes through and is guided in a first opening arranged centrally in the ring part. In particular, the first opening serves as a sliding bearing.
11. The speed reducer according to any one of the preceding claims, It is characterized in that, The ring part is connected to the sleeve, especially in an oil-tight manner, especially detachably. In particular, the ring part screws its external teeth into the internal teeth of the sleeve.
12. The speed reducer according to any one of the preceding claims, It is characterized in that, The ring part has additional openings, and these additional openings are spaced apart from each other in the circumferential direction with respect to the ring axis.
13. The speed reducer according to any one of the preceding claims, It is characterized in that, The tappet has a widened tappet head, and when the tappet head abuts against the ring part, the tappet head - especially in an oil-tight manner - covers the additional openings, The additional opening is radially spaced from the first opening, in particular, the radial range based on the ring axis covered by the first opening is spaced from the radial range covered by the additional opening.
14. The speed reducer according to any one of the preceding claims, characterized in that a spring member supported on the ring member presses against a support ring that abuts against a snap ring, and the snap ring is embedded in an annular groove of the tappet, in particular such that the additional opening is covered by the tappet head - in particular oil-tight.
15. The speed reducer according to any one of the preceding claims, characterized in that an additional snap ring is embedded in an internal groove of the sleeve, and the additional snap ring particularly limits the tappet in the direction of the ring axis of the ring member.