CN210452536U - Oil pressure spanner pulse device - Google Patents
Oil pressure spanner pulse device Download PDFInfo
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- CN210452536U CN210452536U CN201921405212.2U CN201921405212U CN210452536U CN 210452536 U CN210452536 U CN 210452536U CN 201921405212 U CN201921405212 U CN 201921405212U CN 210452536 U CN210452536 U CN 210452536U
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Abstract
The utility model discloses an oil pressure spanner pulse device, including main shaft and hydro-cylinder, the main shaft setting is inside the hydro-cylinder, and the main shaft is rotatable to be set up in the hydro-cylinder bottom surface, is provided with the bearing between the tail end of main shaft and the inside of hydro-cylinder, and the tail end of main shaft corresponds two parts of relative pivoted of laminating bearing respectively with the hydro-cylinder. Therefore, direct contact friction between the tail end of the main shaft and the bottom surface of the oil cylinder is avoided, the bearing has the characteristic of small frictional resistance, so that the frictional force between the tail end of the main shaft and the oil cylinder is greatly reduced, finally, the torque climbing speed of the oil pressure pulse unit is ensured, the energy loss is reduced, meanwhile, the working efficiency and the torque output stability of the oil pressure pulse unit are improved, and the service life of the oil pressure pulse unit is also prolonged.
Description
Technical Field
The utility model relates to an oil pressure pulse technical field, more specifically say, relate to an oil pressure spanner pulse device.
Background
The oil pressure pulse wrench converts the rotation energy of the pneumatic engine into oil pressure pulses, and converts the pulses into fastening torque for screwing and disassembling a threaded fastener. The pulse torque is generated by the rotation of the oil cylinder of the pulse generator and is transmitted to the load end through the main shaft.
At present, the tail end of a main shaft of a pulse unit of most oil pressure pulse tools is in direct contact friction with the bottom surface of an oil cylinder, and under the condition, the tail end of the main shaft and the bottom surface of the oil cylinder are easy to reduce the pulse frequency due to large frictional resistance of a matching surface in the matching and tightening process, so that the climbing of torque is slowed down, and the output loss of the torque is large.
In view of the above, it is an urgent need to solve the above problems by those skilled in the art to provide a device capable of reducing the torque output loss of the hydraulic pulse unit.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides an oil pressure wrench pulse device, which can ensure the pulse efficiency of an oil pressure pulse unit, reduce the torque output loss, and improve the service life of the oil pressure pulse unit.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides an oil pressure spanner pulse device, includes main shaft and hydro-cylinder, and the main shaft sets up inside the hydro-cylinder, and the main shaft is rotatable to be set up in the hydro-cylinder bottom surface, is provided with the bearing between the tail end of main shaft and the inside of hydro-cylinder, and the tail end of main shaft and hydro-cylinder correspond respectively and laminate two parts of relative pivoted of bearing.
Preferably, the bearing is a plane bearing, and the bottom surface of the tail end of the main shaft and the bottom surface inside the oil cylinder are respectively and correspondingly attached to the bearing.
Preferably, the bearing is a flat thrust needle bearing.
Preferably, the bearing is a flat thrust ball bearing.
Preferably, the circumferential surface of the tail end of the main shaft and the circumferential surface inside the oil cylinder are correspondingly attached to the bearing respectively.
Preferably, the bearing is a ring-free bearing having only a cage and rolling elements.
The utility model provides an oil pressure spanner pulse device, including main shaft and hydro-cylinder, the main shaft setting is inside the hydro-cylinder, and the main shaft is rotatable to be set up in the hydro-cylinder bottom surface, is provided with the bearing between the tail end of main shaft and the inside of hydro-cylinder, and the tail end of main shaft corresponds the laminating bearing respectively with the hydro-cylinder.
The bearing is arranged between the tail end of the main shaft and the oil cylinder, the tail end of the main shaft and the oil cylinder respectively correspond to two parts which are attached to the bearing and rotate relatively, direct contact friction between the tail end of the main shaft and the oil cylinder is avoided, the bearing has the characteristic of small frictional resistance, friction force between the tail end of the main shaft and the oil cylinder is greatly reduced, accordingly, the torque climbing speed of the oil pressure pulse unit is guaranteed, energy loss is reduced, and meanwhile, the working efficiency and the torque output stability of the oil pressure pulse unit are improved.
To sum up, the utility model discloses a set bearing arrangement between main shaft tail end and hydro-cylinder, can guarantee the pulse efficiency of oil pressure pulse unit, reduce moment of torsion output loss, finally can improve the moment of torsion output efficiency and the stability of oil pressure pulse unit to improve oil pressure pulse unit's working life.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a sectional view of an embodiment of a hydraulic wrench pulse device according to the present invention;
FIG. 2 is a schematic view of a first bearing of the oil wrench pulse device;
FIG. 3 is a schematic view of a second bearing of the oil wrench pulse device;
FIG. 4 is a schematic view of the cross-sectional structure A-A of FIG. 1;
FIG. 5 is a schematic view of the cross-sectional structure B-B in FIG. 1;
fig. 6 is an exploded view of an oil pressure pulse device in an embodiment of an oil pressure wrench pulse device according to the present invention;
fig. 7 is a schematic structural diagram of a camshaft of an embodiment of an oil pressure wrench pulse device provided by the present invention.
Wherein, 1 is a sealing cover, 2 is a main shaft, 3 is a roller, 4 is a piston, 5 is a cam shaft, 6 is an oil cylinder, 7 is a bearing, 21 is an oil hole, 24 is a sealing step, and 51 is an overflow hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide an oil pressure spanner pulse device, its pulse efficiency that can guarantee the oil pressure pulse unit reduces moment of torsion output loss to improve the working life of oil pressure pulse unit.
Referring to fig. 1 to 7, fig. 1 is a cross-sectional view of an embodiment of a hydraulic wrench pulse device according to the present invention; FIG. 2 is a schematic view of a first bearing of the oil wrench pulse device; FIG. 3 is a schematic view of a second bearing of the oil wrench pulse device;
FIG. 4 is a schematic view of the cross-sectional structure A-A of FIG. 1; FIG. 5 is a schematic view of the cross-sectional structure B-B in FIG. 1; fig. 6 is an exploded view of an oil pressure pulse device in an embodiment of an oil pressure wrench pulse device according to the present invention; fig. 7 is a schematic structural diagram of a camshaft of an embodiment of an oil pressure wrench pulse device provided in the present invention.
The utility model provides a pair of oil pressure spanner pulse device, including main shaft 2 and hydro-cylinder 6, main shaft 2 sets up inside hydro-cylinder 6, and main shaft 2 is rotatable to be set up in hydro-cylinder 6 bottom surfaces, is provided with bearing 7 between main shaft 2's tail end and the hydro-cylinder 6 is inside, and main shaft 2's tail end corresponds two parts of laminating bearing 7's relative pivoted respectively with hydro-cylinder 6.
It should be noted that, by providing the bearing 7 between the tail end of the main shaft 2 and the oil cylinder 6, the tail end of the main shaft 2 and the oil cylinder 6 respectively correspond to two components which are attached to the bearing 7 and rotate relatively, so that direct contact friction between the tail end of the main shaft 2 and the oil cylinder 6 is avoided, and by utilizing the characteristic that the bearing 7 has small friction resistance, the friction force between the tail end of the main shaft 2 and the bottom surface of the oil cylinder 6 is greatly reduced, thereby ensuring the torque climbing speed of the oil pressure pulse unit, reducing energy loss, and simultaneously improving the working efficiency and the torque output stability of the oil pressure pulse unit.
In addition, it should be further noted that the spindle 2 is rotatably disposed on the bottom surface of the cylinder 6, which only illustrates that the relative position between the spindle 2 and the bottom surface of the cylinder 6 can be changed, and does not mean that the spindle 2 and the cylinder 6 rotate synchronously. In addition, the selection of the bearing 7 described herein needs to be selected according to actual conditions and actual requirements during actual operation.
To sum up, the utility model discloses a set bearing 7 device between 2 tail ends of main shaft and hydro-cylinder 6, can guarantee the pulse efficiency of oil pressure pulse unit, reduce moment of torsion output loss, finally can improve the moment of torsion output efficiency and the stability of oil pressure pulse unit to improve the working life of oil pressure pulse unit.
On the basis of the above embodiment, the bearing 7 is a plane bearing, and the bottom surface of the tail end of the main shaft 2 and the bottom surface of the inside of the oil cylinder 6 are respectively and correspondingly attached to the bearing 7.
In addition to the oil wrench pulse device according to the first embodiment, the bearing 7 is a flat thrust needle bearing.
The flat needle thrust bearing is a rolling bearing that receives an axial load, and includes a thrust cage with needle rollers and a thrust washer. The thrust retainer has the functions of keeping the position of the needle roller from being misplaced and guiding the needle roller to rotate. The thrust needle and cage assembly is a major component of a flat thrust needle bearing that, when used with different sets of thrust bearing washers, can provide many different combinations for bearing configurations. However, if the surfaces of the adjacent parts are used as raceway surfaces, a gasket can be omitted, so that the structure of the plane thrust needle roller bearing is more compact, and the needle rollers adopted by the plane thrust needle roller bearing are cylindrical rollers, so that the edge stress can be reduced, and the service life of the plane thrust needle roller bearing is prolonged.
In addition, the contact length between the bearing and a contact object is increased by selecting the high-precision needle roller, so that the plane thrust needle roller bearing can obtain higher load capacity and higher rigidity in a small space. Therefore, the plane thrust needle roller bearing is suitable for occasions with large load requirements and small space size.
As can be seen from the above description, the planar needle roller thrust bearing is disposed between the tail end of the main shaft 2 and the bottom surface of the oil cylinder 6, so that the tail end of the main shaft 2 and the bottom surface of the oil cylinder 6 are respectively and correspondingly attached to two side surfaces of the retainer of the planar needle roller thrust bearing, that is, the tail end of the main shaft 2 and the bottom surface of the oil cylinder 6 are used as raceway surfaces, and therefore, a gasket can be omitted, and the structure of the planar needle roller thrust bearing is more compact. And the plane thrust needle roller bearing has higher load capacity, higher rigidity and longer service life. When the size specification of the main shaft 2, the oil cylinder 6 and the like in the oil pressure wrench pulse device is large, the load formed between the tail end of the main shaft 2 and the bottom surface of the oil cylinder 6 is also large, therefore, preferably, when the specification of the oil pressure wrench pulse device is large, a plane thrust needle bearing is arranged between the tail end of the main shaft 2 and the bottom surface of the oil cylinder 6, and the purposes of improving the pulse efficiency of the oil pressure pulse unit, reducing the torque output loss, improving the torque output energy efficiency and stability of the oil pressure pulse unit and prolonging the service life of the oil pressure pulse unit can be achieved.
In addition to the oil wrench pulse device according to the first embodiment, the bearing 7 is a flat thrust ball bearing.
It should be noted that, the plane thrust ball bearing is a rolling bearing axial load, its nominal contact angle is greater than 45 °, the basic parts are shaft ring, race ring, rolling element with or without cage, and it also has advantages of less noise pollution and long service life. The plane thrust ball bearing is larger than the plane thrust needle roller bearing in space size, but the friction coefficient of the plane thrust ball bearing is smaller than that of the plane thrust needle roller bearing because the steel balls are in point contact.
It can be known from the above description that the flat thrust ball bearing is arranged between the tail end of the main shaft 2 and the bottom surface of the oil cylinder 6, so that the tail end of the main shaft 2 and the bottom surface of the oil cylinder 6 are respectively and correspondingly attached to two side surfaces of the retainer of the flat thrust ball bearing, when the main shaft 2, the oil cylinder 6 and the like in the oil wrench pulse device are small in size, the axial load formed between the tail end of the main shaft 2 and the bottom surface of the oil cylinder 6 is small, by using the flat thrust ball bearing, the friction between the tail end of the main shaft 2, the bottom surface of the oil cylinder 6 and the bearing contact surface can be small, the abrasion between the main shaft 2 and the oil cylinder 6 can be reduced, and the flat thrust ball bearing can bear the axial load, the flat thrust ball bearing has small noise pollution and long service life during use, and finally the pulse efficiency of the oil pulse unit can be effectively ensured, the, and the working life of the oil pulse unit is prolonged.
On the basis of the first embodiment, the circumferential surface of the rear end of the main shaft 2 and the circumferential surface of the interior of the cylinder 6 are respectively adapted to be clearance-fitted with two relatively rotating surfaces of the bearing 7. Namely, a circumferential bearing is adopted, so that the circumferential surface of the tail end of the main shaft 2 is sleeved in the bearing 7, the outer part of the bearing 7 is in clearance fit with the inner wall of the oil cylinder 6, and a rolling body of the bearing 7 can drive the retainer to rotate.
On the basis of the oil pressure wrench pulse device in the first embodiment, specifically, the oil cylinder extends along the axis and is provided with a first accommodating cavity along the axis, the tail end of the main shaft 2 is provided with a second accommodating cavity along the axis, the tail end of the camshaft is embedded into the bottom of the first accommodating cavity along the axis to realize synchronous rotation of the camshaft and the oil cylinder, the head end cam of the camshaft is installed into the second accommodating cavity to realize rotation of the camshaft in the main shaft 2, the upper side and the lower side of the head end cam are provided with vertical holes penetrating through the main shaft 2, a moving part is arranged in each vertical hole to realize up-and-down movement of the moving part along the vertical axis of the vertical hole, the main shaft 2 is provided with a sealing step 24 attached to the side part of the moving part to realize sealing of the inner cavity of the main shaft 2, the inner wall of the oil cylinder is provided with an arc-shaped protrusion to realize that the outer side of the, cup joint the head end of main shaft 2 and install the sealed lid of the end side that holds the chamber at the first and in order to realize the sealing of the inner chamber of hydro-cylinder, the camshaft is along radially being equipped with the overflow hole of perpendicular to axis, the second that the overflow hole intercommunication is located both sides holds the chamber and carries out the pressure release through the overflow hole with the hydraulic oil that realizes in the second holds the chamber, the tail end of main shaft 2 is equipped with oilhole 21 in order to realize the intercommunication of the inner chamber of hydro-cylinder and the inner chamber of main shaft 2, the rotation through the hydro-cylinder converts oil pressure pulse into and acts on main shaft 2 in order to realize the.
It should be noted that, in the use process of the oil pressure wrench pulse device, firstly, the oil cylinder 6 is rotated to generate rotation power, the arc surface bulge on the inner wall of the oil cylinder 6 rotates together with the oil cylinder 6 under the action of the rotation power, and at this time, the main shaft 2 is static relative to the oil cylinder 6 and does not bear acting force; when the arc-shaped bulge rotates around the axis of the oil cylinder 6 to be contacted and attached with the outer side of the moving part, along with the continuous rotation of the arc-shaped bulge, the moving part is acted by a downward pressing force and moves downwards along the vertical hole, at the moment, the side part of the moving part is attached with the sealing step 24 arranged on the main shaft 2 to seal the inner cavity of the main shaft 2, because the sealing cover 1 and the oil cylinder 6 form the sealing of the inner cavity of the oil cylinder 6, on the basis that the sealing of the inner environment and the outer environment of the camshaft 5 and the volume of the inner cavity of the main shaft 2 pressed by the moving part are reduced, hydraulic oil in the inner cavity of the main shaft 2 is pressed and begins to be decompressed through the overflow hole 51 on the camshaft 5, the hydraulic oil finally flows into the inner cavity of the oil cylinder 6 through the oil hole 21, in the hydraulic oil overflowing process, the overflowing hydraulic oil exerts a reaction force on the lower side of the moving part, so that the upper sides of the oil cylinder So that the main shaft 2 rotates and outputs pulse torque outwards; the oil cylinder 6 continues to rotate and drives the moving part to move downwards, when the side part of the moving part is separated from the sealing step 24, the inner cavity of the main shaft 2 is not closed any more, the inner cavity of the main shaft 2 is communicated with the inner cavity of the oil cylinder 6, the pressure difference between the two inner cavities becomes zero, the moving part loses the reaction force of hydraulic oil, the moving part does not apply the reaction force to the oil cylinder 6 any more, namely the oil cylinder 6 loses the driving force to the main shaft 2, at the moment, the pulse action stops, the main shaft 2 also stops rotating, meanwhile, along with the pressing action of the cambered surface bulge on the moving part, the moving part continues to slide downwards until the lowest position, and at the moment, the tangent line; along with the continuous rotation of the oil cylinder 6, the arc-shaped bulge is not contacted with the outer side of the moving part any more, the moving part is not subjected to the pressure of the arc-shaped bulge any more, the cam shaft 5 and the oil cylinder 6 rotate synchronously, at the moment, the cam shaft 5 rotates to be contacted with the bottom surface of the moving part, and along with the continuous rotation of the cam shaft 5, the moving part is subjected to upward thrust and moves upwards; when the moving part moves upwards until the side part of the moving part contacts and is attached to the sealing step 24, the inner cavity of the main shaft 2 is closed again, and along with the continuous upward movement of the moving part, the inner cavity of the main shaft 2 generates oil absorption action due to negative pressure, so that hydraulic oil in the inner cavity of the oil cylinder 6 enters the inner cavity of the main shaft 2 through the oil hole 21 and the overflow hole 51; along with the continuous rotation of the oil cylinder 6, the cam shaft 5 continuously drives the moving part to move upwards until the side part of the moving part is not contacted with and attached to the sealing step 24 any more, the inner cavity of the oil cylinder 6 is communicated with the inner cavity of the main shaft 2 again, and at the moment, the oil suction action is stopped; when the camshaft 5 continues to drive the moving part to move upwards until the tangent of the contact point of the camshaft 5 and the lower side of the moving part is perpendicular to the horizontal axis, the moving part has the highest moving position, and at the moment, the camshaft 5 continues to rotate and is not contacted with the bottom side of the moving part any more and drives the moving part to move; under the continuous rotation of the oil cylinder 6, the arc surface bulge contacts with the outer side of the moving part again and repeats the process, so that the effect that only one pulse is generated when the oil cylinder 6 rotates for one circle is achieved.
For better technological effect, the removal portion includes piston 4 and gyro wheel 3, and piston 4 is equipped with the annular wall with the laminating of vertical hole, and gyro wheel 3 installs and is protruding the laminating of cambered surface of the outside of gyro wheel 3 and hydro-cylinder 6 and follow vertical hole and drive piston 4 downstream when hydro-cylinder 6 rotates on piston 4.
In addition, the head end cam of the cam shaft 5 is provided with a flat section and a convex section, when the moving part moves to the lowest position, the oil cylinder 6 rotates, the lowest end of the cambered surface bulge of the oil cylinder 6 is attached to the roller 3, the piston 4 is attached to the flat section, the tangent line of the contact point of the cambered surface bulge and the cambered surface bulge at the moment is perpendicular to the vertical axis, and the tangent line of the contact point of the piston 4 and the flat section is perpendicular to the vertical axis; when the moving part moves to the highest position, the convex section is attached to the piston 4, a tangent line at the contact point of the convex section and the piston 4 is perpendicular to the vertical axis, and the cambered surface bulge rotates for a quarter of a circle from the lowest end of the cambered surface bulge and the attachment position of the roller 3.
Specifically, the cambered surface of the oil cylinder 6 is two and is symmetrically arranged on the inner side wall surface of the oil cylinder 6, and the moving parts are two and are symmetrically arranged on the upper side and the lower side of the head end cam of the camshaft 5 in the vertical hole. That is, by providing two moving portions in the vertical hole, pressure can be applied to the roller 3 at corresponding positions through the two arc protrusions on the inner side wall of the oil cylinder 6 at the same time, so that both the pistons 4 move toward the direction close to the camshaft 5 along the vertical hole; when the two pistons 4 move to the lowest position towards the camshaft 5 at the same time, the bottom surfaces of the two pistons 4 are respectively contacted with the upper side and the lower side of the flat section of the camshaft 5, and the connecting line of the contact points of the two pistons 4 and the flat section is vertical to the horizontal axis; when the camshaft 5 rotates and contacts the bottoms of the pistons 4 by the convex sections, the two pistons 4 simultaneously move along the vertical holes in a direction away from the camshaft 5; when the two pistons 4 move to the highest position simultaneously, the bottom surfaces of the two pistons 4 are respectively contacted with the upper side and the lower side of the protruding section of the camshaft 5, and the connecting line of the contact points of the two pistons 4 and the protruding section is vertical to the horizontal axis.
Specifically, in the first stage, the oil cylinder 6 is driven by rotary power to generate rotary motion, the oil cylinder 6 is rotated and is contacted with the roller 3 through the arc protrusion, and the arc protrusion applies acting force under the drive of the rotary power to enable the roller 3 to drive the piston 4 to slide inwards along the vertical hole, namely towards the direction close to the camshaft 5; in the second stage, the sealing bulge at the side part of the piston 4 is contacted and attached with the sealing step 24, at the moment, the inner cavity of the main shaft 2 is sealed by the main shaft 2, the piston 4 and the cam shaft 5, the inner cavity of the oil cylinder 6 is sealed by the sealing cover 1 and the oil cylinder 6, in a sealed environment, hydraulic oil in the inner cavity of the main shaft 2 is affected by the downward movement of the piston 4 so that the volume of the inner cavity of the main shaft 2 is reduced, the hydraulic oil in the inner cavity of the main shaft 2 is pressurized and begins to be decompressed through an overflow hole 51 on the cam shaft 5, finally the hydraulic oil flows into the inner cavity of the oil cylinder 6 through an oil hole 21 at the tail part of the main shaft 2, in the process of overflow pressure relief, the hydraulic oil applies reaction force to the piston 4, the oil cylinder 6 and the roller 3 form interaction force, in the stage, the piston 4 is always in a closed condition, the oil cylinder 6 can drive the roller 3 to transmit torque to the main shaft 2, so that the main shaft 2 rotates, namely the main shaft 2 generates a rotation angle relative to the oil cylinder 6; in the third stage, the oil cylinder 6 continues to rotate under the drive of the rotary power, the piston 4 continues to move inwards under the action of the cambered surface protrusion until the sealing protrusion on the side part of the piston 4 is separated from the contact fit with the sealing step 24, at the moment, the inner cavity of the main shaft 2 is not sealed, namely, the inner cavity of the main shaft 2 is communicated with the inner cavity of the oil cylinder 6, the pressure difference of the two accommodating cavities becomes zero, the piston 4 loses the reaction force of the hydraulic oil, namely, the roller 3 does not apply the reaction force to the oil cylinder 6, namely, the oil cylinder 6 loses the driving force to the main shaft 2, at the moment, the pulse action is stopped; in the fourth stage, the oil cylinder 6 continues to rotate, on the premise that the inner cavity of the main shaft 2 is communicated with the inner cavity of the oil cylinder 6 and the roller 3 does not exert a reaction force on the oil cylinder 6 any more, the arc-shaped protrusion continues to exert an acting force on the roller 3, the roller 3 moves to the lowest position under the action of the oil cylinder 6, namely, the piston 4 is respectively attached to the flat sections on the upper side and the lower side of the cam shaft 5, at the moment, the lowest end of the arc-shaped protrusion is attached to the roller 3, namely, the tangent line of the contact point of the arc-shaped protrusion and; in the fifth stage, the oil cylinder 6 continues to rotate, the cambered surface bulge is separated from contact and attachment with the roller 3, the roller 3 is not subjected to the acting force of the oil cylinder 6 any more, at the moment, the cam shaft 5 rotates synchronously with the oil cylinder 6, under the rotation action of the cam shaft 5, the piston 4 is subjected to upward thrust, namely, under the driving of the cam shaft 5, the bulge section pushes the piston 4 to slide along the vertical hole in the direction far away from the cam shaft 5; in the sixth stage, the camshaft 5 continues to rotate and drives the piston 4 to slide upwards, when the piston 4 slides to the sealing bulge at the side part of the piston 4 and is contacted and jointed with the sealing step 24, the inner cavity of the main shaft 2 is closed again, the volume of the inner cavity of the main shaft 2 is increased and negative pressure is generated through the continuous upward sliding of the piston 4, the inner cavity of the main shaft 2 generates oil absorption action under the action of the negative pressure, and hydraulic oil in the inner cavity of the oil cylinder 6 flows into the inner cavity of the main shaft 2 through the oil hole 21 and the overflow hole 51 of the camshaft 5; in the seventh stage, the camshaft 5 continues to synchronously rotate along with the rotation of the oil cylinder 6, when the piston 4 moves upwards until the sealing bulge of the piston is separated from contact and fit with the sealing step 24, the inner cavity of the main shaft 2 is not closed any more, namely the inner cavity of the main shaft 2 is communicated with the inner cavity of the oil cylinder 6, and at the moment, the oil suction action is stopped; in the eighth stage, the inner cavity of the main shaft 2 is not closed any more, the piston 4 continues to slide outwards until the bottom of the piston 4 is respectively attached to the upper side and the lower side of the protruding section of the camshaft 5, the tangent of the contact point of the piston 4 and the protruding section is perpendicular to the vertical axis, and the piston 4 has the highest position. The pulse action of the oil cylinder 6 is completed by the above process, and the next pulse action can be performed by repeating the above process.
On the basis of an oil wrench pulse device according to any one of the above embodiments, the bearing 7 is specifically a ring-less bearing having only a cage and rolling elements.
It should be noted that the bearing 7 described herein is a ring-free bearing having only a retainer and a rolling element, and is to make the tail end of the main shaft 2 and the bottom surface of the oil cylinder 6 respectively and correspondingly attach to two side surfaces of the rolling element of the bearing 7, that is, the tail end of the main shaft 2 and the bottom surface of the oil cylinder 6 can be used as rolling surfaces of the rolling element, so that a ring can be omitted, the structure of the bearing 7 is more compact, and the structure of the oil wrench pulse device can be more compact.
It should be further noted that, in order to ensure that the loading capacity and the running performance of the bearing without the ferrule are the same as those of the bearing with the ferrule, the hardness, the processing precision and the surface quality of the raceway surface should be similar to those of the bearing with the ferrule, that is, the hardness, the processing precision and the surface quality of the tail end of the main shaft 2 and the bottom surface of the oil cylinder 6 should be similar to those of the raceway surface of the bearing with the ferrule.
It should be noted that, in actual operation, the bearing 7 may be a bearing with a cage and a rolling element, but the bearing has a larger space size and is not as compact as a bearing without a cage. Therefore, in the actual application process, the selection of the bearing 7 can be selected according to the actual situation and the actual requirement.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The utility model provides an arbitrary compound mode of all embodiments all is in this utility model's a protection scope, does not do here and gives unnecessary details.
It is right above that the utility model provides an oil pressure spanner pulse device introduces in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (6)
1. The utility model provides an oil pressure spanner pulse device, includes main shaft (2) and hydro-cylinder (6), its characterized in that, main shaft (2) set up inside hydro-cylinder (6), just main shaft (2) rotatable set up in the bottom surface of hydro-cylinder (6), the tail end of main shaft (2) with be provided with bearing (7) between the inside of hydro-cylinder (6), the tail end of main shaft (2) with hydro-cylinder (6) correspond the laminating respectively two parts of relative pivoted of bearing (7).
2. The oil wrench pulse device according to claim 1, wherein the bearing (7) is a flat bearing, and the bottom surface of the tail end of the main shaft (2) and the bottom surface of the inside of the oil cylinder (6) are respectively attached to the bearing (7) correspondingly.
3. An oil wrench pulse device according to claim 2, characterized in that the bearing (7) is a flat thrust needle bearing.
4. An oil wrench impulse device according to claim 2, characterized in, that said bearing (7) is a flat thrust ball bearing.
5. An oil wrench pulse device according to claim 1, characterized in that the circumferential surface of the tail end of the spindle (2) and the circumferential surface inside the cylinder (6) are adapted to be clearance fitted with two relatively rotating surfaces of the bearing (7), respectively.
6. An oil wrench impulse device according to any one of the claims 1-5, characterized in, that the bearing (7) is a ring-less bearing with only cage and rolling bodies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921405212.2U CN210452536U (en) | 2019-08-27 | 2019-08-27 | Oil pressure spanner pulse device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921405212.2U CN210452536U (en) | 2019-08-27 | 2019-08-27 | Oil pressure spanner pulse device |
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| CN210452536U true CN210452536U (en) | 2020-05-05 |
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| CN201921405212.2U Active CN210452536U (en) | 2019-08-27 | 2019-08-27 | Oil pressure spanner pulse device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111546277A (en) * | 2020-05-13 | 2020-08-18 | 泰田集团有限公司 | Pneumatic screwdriver and impact mechanism |
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2019
- 2019-08-27 CN CN201921405212.2U patent/CN210452536U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111546277A (en) * | 2020-05-13 | 2020-08-18 | 泰田集团有限公司 | Pneumatic screwdriver and impact mechanism |
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Address after: No.98, dongtaihe Road, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Taitian Group Co.,Ltd. Address before: No.98, dongtaihe Road, Jiaojiang District, Taizhou City, Zhejiang Province Patentee before: TAITIAN GROUP CO.,LTD. |