Flange plate driving device and pump motor device

Abstract

The utility model relates to the field of pump-motor, in particular to a flange plate driving device and a pump motor device.The flange plate driving device comprises a cylindrical cam, a cam variable rod and a guide mechanism, when the cylindrical cam rotates, the intersection point of a first limiting part on the cylindrical cam and the first end of the cam variable rod continuously changes, and the first limiting part of the cylindrical cam and the first end of the cam variable rod continuously change; in other words, the position of the first sliding part on the cam variable rod continuously changes along with the position of the intersection point, so that rotation of the cylindrical cam can be converted into directional movement of the cam variable rod, the flange plate is driven to swing through the directional movement of the cam variable rod, and the rotation angle of the cylindrical cam is controlled; and the swing angle of the flange plate can be accurately driven and controlled, so that the flange plate can be suitable for various working conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to pump-motor field, concretely relates to a flange plate drive device and pump-motor. BACKGROUND

[0002] In the variable hydraulic pump-motor working process, the displacement and the torque change are controlled by the flange plate swing angle of the pump-motor, and the existing flange plate swing angle control generally directly uses the reciprocating swing of the motion end of the hydraulic drive flange plate, and this driving mode makes the flange plate only be located in the middle position or left limit position or right limit position, has certain limitation, and cannot be applicable to various complex working conditions. SUMMARY

[0003] In order to solve the above technical problems, on the one hand, the utility model provides a flange plate drive device for driving the flange plate reciprocating swing around its swing center, comprising:

[0004] Cylinder cam, the cylinder cam at least has first cylinder surface, the first cylinder surface is formed on the first limit portion along the first curve, and the first curve is formed on the first cylinder surface along the circumferential direction and along the axial direction simultaneously;

[0005] Cam variable rod, including first end and second end, the first end is provided with the first sliding portion that can slide along the first limit portion, and the second end is provided with the second limit portion that can cooperate with the second sliding portion on the flange plate;

[0006] Guiding mechanism for limiting the movement of the cam variable rod perpendicular to the first plane, and the first plane is parallel to the movement curve of the second sliding portion when the flange plate swings.

[0007] Preferably, the first curve is a closed curve, so that the first limit portion is connected at the first end and the end.

[0008] Preferably, the first limit portion is a first groove formed along the first curve.

[0009] Preferably, the first sliding portion is provided with a roller, and the roller can slide or roll in the first groove.

[0010] Preferably, the second limit portion is a second groove formed on the cam variable rod along the axial direction of the cam variable rod, and the second sliding portion can reciprocate in the second groove.

[0011] Preferably, the guide mechanism comprises a hinge shaft arranged between the first end and the second end, and the cam variable rod is hinged to the hinge shaft, and when the first limiting part drives the first sliding part to slide, the cam variable rod can swing around the hinge shaft.

[0012] Preferably, the flange driving device further comprises a cam shaft, and the cylindrical cam is connected to a power source through the cam shaft, and the power source can output torque around the axis of the first cylindrical surface.

[0013] Preferably, the power source is a servo motor.

[0014] In another aspect, the utility model also provides a pump-motor, the pump-motor includes the flange plate and flange plate driving device of above.

[0015] By the technical scheme of the utility model, the flange driving device comprises a cylindrical cam, a cam variable rod and a guide mechanism, the guide mechanism is used for limiting the movement of the plane where the movement curve of the second sliding part is located when the cam variable rod swings perpendicularly to the flange, that is, the movement track of any point on the cam variable rod is parallel to the plane, when the cylindrical cam rotates, the intersection point of the first limiting part on the cylindrical cam and the first end of the cam variable rod continuously changes, that is, the position of the first sliding part on the cam variable rod continuously changes with the position of the intersection point, therefore, the rotation of the cylindrical cam can be converted into the directional movement of the cam variable rod, and then the directional movement of the cam variable rod drives the swing of the flange, and by controlling the rotation angle of the cylindrical cam, the swing angle of the flange can be accurately driven and controlled, so that the flange can be suitable for various working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the structure schematic view of the flange driving device provided by an embodiment of the utility model, and

[0017] Figure 2 is the structure schematic view of the flange driving device in different movement states provided by an embodiment of the utility model, and

[0018] Figure 3 is the principle diagram of the cylindrical cam displacement curve function in the flange driving device provided by an embodiment of the utility model, and

[0019] Wherein, 1, cylindrical cam;11, first cylindrical surface;12, first limiting part;2, cam variable rod;21, first sliding part;22, second limiting part;3, guide mechanism;4, flange;41, second sliding part;42, movement curve. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described in the following with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] Figure 1 It is the structural schematic view of the flange driving device provided by an embodiment of the utility model.

[0022] As Figure 1 shown, the utility model provides a kind of flange driving device, for driving flange 4 reciprocating swing around its swing center, including cylindrical cam 1, cam variable rod 2 and guide mechanism 3, the movement track of any point on cam variable rod 2 is parallel to first plane, cylindrical cam 1 at least has first cylindrical surface 11, first cylindrical surface is formed with first limiting portion 12 on it along first curve extends, first curve is the curve that extends along the circumference direction and axial direction on first cylindrical surface 11, cam variable rod 2 includes first end and second end, in Figure 1 It is left end and right end, first sliding portion 21 is provided on first end, first sliding portion 21 can be cooperated with first limiting portion 12, second limiting portion 22 is provided on second end, for cooperating with second sliding portion 41 on flange 4;

[0023] Guide mechanism 3 is used to limit the movement of cam variable rod 2 towards perpendicular to first plane, first plane is parallel to the movement curve 42 (the circular dotted line track in Figure 1 When cylindrical cam 1 rotates, the intersection of first curve and the plane where first sliding portion 21 movement track is located is constantly changed, i.e. the intersection of first limiting portion 12 and the plane is constantly changed, so that first sliding portion 21 slides along first limiting portion 12 under the limiting action of guide mechanism 3, and then drive the action of cam variable rod 2, and drive the swing of flange 4 through the cooperation of second limiting portion 22 and second sliding portion 41.

[0024] Based on the above setting, by cylindrical cam 1 as driving part, cam variable rod 2 as transmission part, flange 4 as driven part, by controlling the rotation angle of cylindrical cam 1, the movement of cam variable rod 2 and the swing angle of flange 4 can be conveniently controlled, so that flange 4 can be suitable for various working conditions, and the relationship function between the rotation angle of cylindrical cam 1 and the movement amplitude of cam variable rod 2 and the swing angle of flange 4 can be further established according to size parameters, to facilitate further control.

[0025] The positional relationship between the cylindrical cam 1 and the cam variable rod 2 can be as follows: Figure 1 As shown, the first cylindrical surface 11 of the cylindrical cam 1 is located on the side of the first end of the cam variable rod 2 that is perpendicular to the paper and faces inward (or outward). Alternatively, the first cylindrical surface 11 can be installed on the side of the first end that is far away from the second end. The positional relationship between the cylindrical cam 1 and the cam variable rod 2 can be adjusted according to the actual installation space and other conditions, which will not be elaborated here.

[0026] It should also be noted that the cylindrical cam 1 can be as follows: Figure 1 The cylindrical structure shown can also be a structure with only the first cylindrical surface 11 in other shapes, such as a cylinder, etc. The first cylindrical surface 11 can be as follows: Figure 1 The complete cylindrical surface shown can also be a partial area of ​​a cylindrical surface, as long as the shape and structure of the cylindrical cam 1 and the first cylindrical surface 11 can satisfy the requirement that when the first cylindrical surface 11 rotates around the axis, the first limiting part 12 provided on it can drive the first sliding part 21 to move.

[0027] like Figure 1 As shown, in one preferred embodiment, the first curve is a closed curve, that is, a curve with the beginning and end connected. At this time, the beginning and end of the first limiting part 12 are connected to each other to form a closed annular groove. When the first cylindrical surface 11 rotates once, the movement trajectory of the first sliding part 21 on the first limiting part 12 is exactly the same. At this time, it is only necessary to drive the cylindrical cam 1 to rotate in a specific direction, which can drive the cam variable rod 2 to swing back and forth, thereby driving the flange 4 to swing back and forth.

[0028] In addition, the first curve can also be an open curve, that is, a curve whose beginning and end are not connected, such as a spiral. In this case, the beginning and end of the first limiting part 12 are far apart from each other. When the first cylindrical surface 11 rotates, the first sliding part 21 can only drive the first limiting part 12 to slide in a direction. Therefore, it can drive the first cylindrical surface 11 to rotate in both directions, thereby driving the cam variable rod 2 and the flange 4 to reciprocate.

[0029] Figure 2 This is a structural schematic diagram of a flange drive device in different motion states according to an embodiment of the present invention.

[0030] like Figure 2 As shown, Figure 2 The illustration shows, in one specific embodiment, the state of the cam variable rod 2 when the cylindrical cam 1 drives the cam variable rod 2 to swing, the state of the cam variable rod 2 when it is in the middle position and the two extreme positions on both sides of the middle position, and the state of the flange 4 when the cam variable rod 2 is in the above three position states, the state of the flange 4 when it is in the middle position and the two extreme positions on both sides of the middle position.

[0031] in, Figure 2The first curve in the shown embodiment is a closed curve, and the first limiting part 12 formed along the closed curve has a midpoint, an upper extreme point and a lower extreme point in the axial direction of the first cylindrical surface 11. When the first sliding part 21 cooperates with the midpoint, the cam variable rod 2 and the flange plate 4 are in the middle position. When the first sliding part 21 cooperates with the upper extreme point or the lower extreme point, the cam variable rod 2 and the flange plate 4 are in the two extreme positions respectively.

[0032] As shown in one of the preferred embodiments, the first limiting part 12 is a first groove formed along the first curve, i.e. a groove opened on the peripheral surface of the first cylindrical surface 11. The first groove can have two groove side surfaces and a groove bottom surface, which can limit the first sliding part 21 in three directions, so as to realize the relative sliding of the first sliding part 21 relative to the first limiting part 12. When turning the cylindrical cam 1, only the feed amount during turning needs to be controlled, so as to realize the machining of the groove on the cylindrical surface, and the manufacturing of the cylindrical cam 1 is more convenient. Figure 1 In addition, the first limiting part 12 can also be other grooves formed along the first curve, such as a T-shaped groove, etc., or a protruding structure formed along the first curve. At this time, the first sliding part 21 should have a recess structure corresponding to the protruding structure, so that the first sliding part 21 can slide along the first limiting part 12.

[0033] In one of the preferred embodiments, the first sliding part 21 is internally provided with a roller, which can slide or roll in the above-mentioned first groove. The specific movement mode of the roller can refer to the movement mode of the roller in the existing ball bearing. Through such a setting, the friction between the first sliding part 21 and the first limiting part 12 can be reduced, or the sliding friction can be converted into lower rolling friction, so that the movement of the first sliding part 21 and the cam variable rod 2 is more smooth.

[0034] As shown in one of the preferred embodiments, the first limiting part 12 is a first groove formed along the first curve, i.e. a groove opened on the peripheral surface of the first cylindrical surface 11. The first groove can have two groove side surfaces and a groove bottom surface, which can limit the first sliding part 21 in three directions, so as to realize the relative sliding of the first sliding part 21 relative to the first limiting part 12. When turning the cylindrical cam 1, only the feed amount during turning needs to be controlled, so as to realize the machining of the groove on the cylindrical surface, and the manufacturing of the cylindrical cam 1 is more convenient.

[0035] Figure 1 ​As shown, in one of the preferred embodiments, the second limiting portion 22 is a second groove formed on the cam variable lever 2 along the axial direction of the cam variable lever 2, and the second sliding portion 41 can reciprocate in the second groove, forming a sliding groove connecting rod structure; since the rotation center of the flange plate 4 is fixed, the second sliding portion 41 can only move along the movement curve 42, so the second groove of the second limiting portion 22 should have a certain length to ensure the smoothness of the movement. Similar to the cooperation of the first limiting portion 12 and the first sliding portion 21, the second limiting portion 22 can also be a protruding structure formed on the cam variable lever 2 along the axial direction, at this time the second sliding portion 41 should have a recess structure corresponding to the protruding structure and other clamping structures, as long as the second limiting portion 22 can drive the second sliding portion 41 and the flange plate 4 to swing when the cam variable lever 2 swings.

[0036] As shown, Figure 1 in one of the preferred embodiments, the guide mechanism 3 can be a hinged structure, that is, a hinge hole is arranged between the first end and the second end of the cam variable lever 2, the hinge hole is hinged on the hinge shaft of the guide mechanism 3, and the hinge shaft is perpendicular to the movement curve 42 Figure 1 , that is, perpendicular to the paper), so that the cam variable lever 2 can only reciprocate around the hinge shaft, that is, the movement of the cam variable lever 2 perpendicular to the movement curve 42 can be limited;

[0037] With such a setting mode, by adjusting the first distance between the first end and the hinge hole and the second distance between the second end and the hinge hole, when the first distance is greater than the second distance, the cam transmission mechanism saves power and distance, and when the first distance is less than the second distance, the cam transmission mechanism consumes power and saves distance, thereby adjusting the transmission ratio of the cam transmission mechanism; further, a plurality of hinge holes can be formed on the cam variable lever, each hinge hole can cooperate with the hinge shaft, and by adjusting the hinge hole cooperating with the hinge shaft, only one cam variable lever can meet the demand of multiple transmission ratios;

[0038] In addition, the guide mechanism 3 can also be a straight line guide mechanism, for example, the guide mechanism 3 has a sliding groove parallel to the axial direction of the first cylindrical surface 41, the cam variable lever 2 is provided with a sliding block cooperating with the sliding groove, and the sliding block can only reciprocate along the sliding groove, when the cylindrical cam 1 rotates, based on the limiting of the sliding groove, the cam variable lever 2 reciprocates along the extension direction of the sliding groove, realizing the driving of the flange plate 4, and the specific structure of the guide mechanism 3 can only realize the limiting of the cam variable lever 2, which will not be described here.

[0039] In one of the preferred embodiments, a cam shaft is connected to the cylindrical cam 1, the cylindrical cam 1 is connected to the power source through the cam shaft, and the power source can output torque around the axis of the first cylindrical surface 11, the cam shaft can be, for example, Figure 1As shown, the shaft-shaped components arranged on the axial two sides of the cylindrical cam 1, the two end portions of which can be installed in the corresponding support structure through rotating bearings, thereby supporting the cylindrical cam 1 between the support structures; wherein the cam shaft is preferably coaxially arranged with the cylindrical cam 1 and the first cylindrical surface 11, so that the dynamic balance is better when rotating, or other installation modes can be selected according to actual needs, in addition, the cam shaft can be a shaft rod fixedly installed on the cylindrical cam 1, or can be integrally formed with the cylindrical cam 1, which will not be described here.

[0040] In one preferred embodiment, the power source adopts a servo motor, which can output a more precise quantitative torque or rotation angle, thereby being able to control the rotation of the cam shaft and the cylindrical cam 1 more accurately.

[0041] The utility model also provides a pump-motor, including above-mentioned flange plate drive arrangement and flange plate, any item flange plate and flange plate drive arrangement, application this embodiment provides pump-motor, flange plate 4 has more swing angle state, and can pass through the rotation of cylindrical cam 1 accurate control flange plate 4 swing angle, improve the use effect of pump-motor.

[0042] In one preferred embodiment, the pump-motor further comprises a drive control system, which can calculate the displacement V of the pump-motor from the rotation angle x of the cylindrical cam 1 according to the formula V=f1(f2(g2(g1(x)))).

[0043] Wherein, g1(x)=α, α is the swing angle of the cam variable rod 2, g2(g1(x))=β, β is the swing angle of the flange plate 4, f2(g2(g1(x)))=γ, γ is the angle between the cylinder and the rotation center of the main shaft of the pump-motor based on the swing angle of the flange plate 4, and finally the displacement V is calculated according to the value of γ.

[0044] Figure 3 It is the flange plate drive device provided by an embodiment of the utility model. Wherein, the horizontal coordinate x is the rotation angle of the cylindrical cam 1, the vertical coordinate g1(x) is the offset of the first sliding part 21 relative to the middle position (i.e. the flange plate 4 is in the middle position, and in the Figure 1 embodiment, the cam variable rod 2 is in the horizontal state), α is the swing angle of the cam variable rod 2, rm is the cylindrical radius of the first cylindrical surface 11 of the cylindrical cam 1, 2πrm is the circumference of the first cylindrical surface 11, and A is the swing diameter of the first sliding part 21 of the cam variable rod 2 around the guide mechanism 3 (in Figure 3 the embodiment, the guide mechanism 3 adopts Figure 1 the hinged structure shown in Figure 2 , and A is the distance between the first sliding part 21 and the hinge shaft).

[0045] As Figure 3 shown, when the rotation angle of the cylindrical cam 1 is x1, the first sliding part 21 is at one limit position on the first limit part 12 of the cylindrical cam 1, at this time, the offset g1(x1) of the first sliding part 21 is the maximum offset in one direction, the swing angle of the cam variable rod 2 is -αmax, which is the maximum swing angle in one direction, at this time, the swing angle of the flange plate 4 is βmax, with the rotation angle of the cylindrical cam 1 changing to x1, x2, …, until x n , the first sliding part 21 is at another limit position on the first limit part 12 of the cylindrical cam 1, the offset g1(x n ) of the first sliding part 21 is the maximum offset in another direction, the swing angle of the cam variable rod 2 is αmax, which is the maximum swing angle in another direction, at this time, the swing angle of the flange plate 4 is -βmax, by establishing the above function curve, the offset of the first sliding part 21 and the swing angle α of the cam variable rod 2 can be obtained from the rotation angle x of the cylindrical cam 1, and then the swing angle β of the flange plate 4 can be obtained.

[0046] In addition, the mathematical relationship between the displacement of the first sliding part 21 and the displacement of the second limit part 22 of the cam variable rod 2 can be further established according to the specific setting mode of the cam variable rod 2 and the guide mechanism 3, the mathematical relationship between the displacement of the second limit part and the displacement of the second sliding part 41 of the flange plate 4 can be established according to the specific setting mode of the second limit part 22 and the second sliding part 41 of the flange plate 4, and the swing angle of the flange plate 4 can be further obtained;

[0047] That is, the relationship between the rotation angle of the cylindrical cam and the displacement of the pump-motor can be obtained according to the specific parameters of the pump-motor and the flange plate driving device therein, so that when the pump-motor needs to output the displacement V1, the rotation angle x1 of the cylindrical cam can be inversely deduced through the above relationship, and the rotation angle of the cylindrical cam 1 can be quantitatively driven through a servo motor or the like, so as to realize the output displacement of various pump-motors and meet the needs of various working conditions.

[0048] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent replacements of the technical solutions of the present application do not deviate from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A flange driving device for driving a flange to reciprocate around its swing center, characterized in that, include: A cylindrical cam, wherein the cylindrical cam has at least a first cylindrical surface, and a first limiting portion is formed on the first cylindrical surface by extending along a first curve, the first curve being formed on the first cylindrical surface by extending simultaneously in the circumferential direction and in the axial direction. A cam variable lever includes a first end and a second end. The first end is provided with a first sliding part that can slide along the first limiting part, and the second end is provided with a second limiting part that can cooperate with the second sliding part on the flange. A guiding mechanism is used to limit the movement of the cam variable rod perpendicular to a first plane, the first plane being parallel to the motion curve of the second sliding part when the flange swings.

2. The flange driving device according to claim 1, characterized in that, The first curve is a closed curve, which connects the first end and the last end of the first limiting part.

3. The flange drive device according to claim 1, characterized in that, The first limiting part is a first groove formed by extending along the first curve.

4. The flange driving device according to claim 3, characterized in that, The first sliding part is provided with a roller, which can slide or roll within the first groove.

5. The flange drive device according to claim 1, characterized in that, The second limiting part is a second groove formed on the cam variable rod extending along the axial direction of the cam variable rod, and the second sliding part can reciprocate within the second groove.

6. The flange driving device according to claim 1, characterized in that, The guiding mechanism includes a hinge shaft disposed between the first end and the second end, and the cam variable rod is hinged to the hinge shaft. When the first limiting part drives the first sliding part to slide, the cam variable rod can swing around the hinge shaft.

7. The flange drive device according to claim 1, characterized in that, It also includes a camshaft, through which the cylindrical cam is connected to a power source, the power source being able to output torque about the axis of the first cylindrical surface.

8. The flange drive device according to claim 7, characterized in that, The power source is a servo motor.

9. A pump motor device, characterized in that, The pump motor assembly includes the flange and flange drive device as described in any one of claims 1 to 8.

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