Turning clamp and system for spline shaft

Abstract

The utility model belongs to the technical field of spline shaft machining, and discloses a turning clamp and system for a spline shaft, and the turning clamp comprises a shell, a first clamping jaw assembly, a second clamping jaw assembly and a control module; the first clamping jaw assembly comprises two self-centering clamping jaws which are symmetrically arranged on the shell; the second clamping jaw assembly comprises at least two induction clamping jaws symmetrically arranged on the shell. The control module is in signal connection with the first clamping jaw assembly so as to synchronously control the two self-centering clamping jaws to move relatively in the diameter direction of the shell. The control module is in signal connection with the second clamping jaw assembly so as to independently control the at least two induction clamping jaws to freely move in the diameter direction of the shell, according to the technical scheme, a spline shaft with iron knots on the cast surface can be clamped and fixed, and turning machining can be conveniently conducted on the spline shaft of the type.

Description

Technical Field

[0001] The utility model relates to the technical field of spline shaft processing, in particular to a spline shaft turning fixture and a system. Background Art

[0002] As a mechanical transmission element, a spline shaft has key teeth arranged along the axial direction for transmitting torque and synchronous rotation. It is often used in situations where precise positioning and high torque transmission are required. Its manufacturing process generally requires the use of a lathe to process the outer dimensions of the spline shaft raw material, and then a milling machine to process the key teeth of the spline shaft. In the process of using a lathe to process the spline shaft raw material, however, the spline shaft raw material often forms protruding burrs and iron lumps on the surface after casting, resulting in an uneven surface of the spline shaft raw material. When turning the spline shaft raw material, the lathe chuck cannot clamp or even hold the spline shaft raw material due to the uneven surface of the spline shaft raw material. In view of this, the utility model is proposed. Utility Model Content

[0003] In order to solve the problem that a lathe chuck cannot clamp or even cannot clamp a spline shaft raw material with iron lumps, the utility model provides a turning fixture and system for a spline shaft.

[0004] In order to solve the above-mentioned technical problems, the utility model provides a turning fixture for a spline shaft, the turning fixture comprising a shell, a first jaw assembly, a second jaw assembly and a control module; the first jaw assembly comprises two self-centering jaws symmetrically arranged on the shell; the second jaw assembly comprises at least two induction jaws symmetrically arranged on the shell; the control module is connected to the first jaw assembly signal to synchronously control the two self-centering jaws to move relative to each other along the diameter direction of the shell; the control module is connected to the second jaw assembly signal to individually control at least two induction jaws to move freely along the diameter direction of the shell.

[0005] In an embodiment of the present utility model, the number of the self-centering claws is two, and the number of the induction claws is 2n times the number of the self-centering claws, wherein n is a positive integer.

[0006] In an embodiment of the present utility model, when n is greater than or equal to 2, the angles between adjacent sensing claws and the angles between adjacent sensing claws and the self-centering claw are equal.

[0007] In an embodiment of the present utility model, the turning fixture further comprises a force control sensing module connected to the second clamping jaw assembly by signal so as to sense the clamping force of the induction clamping jaw.

[0008] In an embodiment of the utility model, the first clamping jaw assembly includes a first driving member, a first gear and a driving disk. The driving disk is arranged in the shell and has a transmission gear on one side and a spirally distributed slot on the other side. The first gear is fixed to the first driving member and meshes with the transmission gear. The self-centering clamping jaw is provided with a tooth that meshes with the slot.

[0009] In an embodiment of the utility model, the second clamping jaw assembly includes a second driving member and a second gear, a rack is provided on one side of the sensing claw, the second driving member is fixed on the shell, the second gear is fixed on the second driving member and meshes with the rack; the number of the second driving members and the second gear is equal to the number of the sensing claws.

[0010] In an embodiment of the present invention, the second clamping jaw assembly further comprises a protective shell, and the protective shell is fixed on the housing to accommodate the second driving member and the second gear.

[0011] In an embodiment of the utility model, a clamping portion concentric with the housing is provided on the housing, and a receiving area for receiving the first clamping jaw assembly is formed inside the clamping portion.

[0012] In an embodiment of the utility model, the surfaces of the self-centering claw and the induction claw that clamp the spline shaft are provided with anti-slip grooves.

[0013] In order to solve the technical problems in the prior art, the utility model also provides a turning system for a spline shaft, wherein the turning system comprises a lathe and the turning fixture, and the lathe comprises a chuck for clamping the turning fixture.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] By controlling the synchronous movement of the two self-centering jaws, the initial clamping and fixing of the spline shaft can be achieved. By controlling the self-centering jaws to move individually, when there is an iron lump on the spline shaft, at least two sensing jaws can be moved to different distances to clamp the spline shaft, thereby achieving secondary fixation of the spline shaft and improving the firmness of the spline shaft clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the embodiments of the present utility model and constitute a part of the specification. Together with the following specific implementation methods, they are used to explain the embodiments of the present utility model, but do not constitute a limitation on the embodiments of the present utility model. In the accompanying drawings:

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the turning fixture provided by the embodiment of the utility model;

[0018] Figure 2 This is a first exploded structural schematic diagram of a turning fixture provided by an embodiment of the utility model;

[0019] Figure 3 It is a second exploded structural schematic diagram of the turning fixture provided by one embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of a first state of a turning fixture provided by an embodiment of the utility model clamping a spline shaft;

[0021] Figure 5 This is a schematic diagram of a second state of a turning fixture provided by an embodiment of the utility model clamping a spline shaft;

[0022] Figure 6 This is a schematic diagram of a third state of a turning fixture clamping a spline shaft provided by an embodiment of the utility model;

[0023] Figure 7 This is a schematic diagram of a state in which a turning fixture provided by another embodiment of the utility model clamps a spline shaft.

[0024] Description of Reference Numerals

[0025] 1. Turning fixture; 2. Spline shaft; 21. Iron lump; 11. Housing; 12. First clamping jaw assembly; 13. Second clamping jaw assembly;

[0026] 111, clamping portion;

[0027] 121, self-centering claw; 122, first driving member; 123, first gear; 124, driving plate; 125, transmission gear; 126, slot; 127, tooth;

[0028] 131. Induction claw; 132. Second driving member; 133. Second gear; 134. Rack; 135. Protective shell. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0030] See also Figure 1-Figure 4 , Figure 1 It is a three-dimensional structural schematic diagram of the turning fixture provided by the embodiment of the utility model; Figure 2 This is a first exploded structural schematic diagram of a turning fixture provided by an embodiment of the utility model;

[0031] Figure 3It is a second exploded structural schematic diagram of the turning fixture provided by one embodiment of the utility model; Figure 4 It is a schematic diagram of the first state of the turning fixture provided by the embodiment of the utility model clamping the spline shaft. The turning fixture 1 includes a housing 11, a first clamping jaw assembly 12, a second clamping jaw assembly 13 and a control module; the first clamping jaw assembly 12 includes two self-centering jaws 121 symmetrically arranged on the housing 11; the second clamping jaw assembly 13 includes at least two induction jaws 131 symmetrically arranged on the housing 11; the control module is connected to the first clamping jaw assembly 12 to synchronously control the two self-centering jaws 121 to move relative to each other along the diameter direction of the housing 11; the control module is connected to the second clamping jaw assembly 13 to individually control the at least two induction jaws 131 to move freely along the diameter direction of the housing 11.

[0032] By symmetrically arranging two self-centering claws 121 on the shell 11, and using a control module to connect the signal with the first clamping jaw assembly 12, the two self-centering claws 121 can be driven to move relative to each other along the diameter direction of the shell 11 under the control of the control module. That is, the control module can control the two self-centering claws 121 to move toward the center direction of the shell 11 at the same time or move away from the center direction of the shell 11 at the same time, so that the two self-centering claws 121 can clamp or release the spline shaft 2 in the same diameter direction together. After clamping the spline shaft 2, the two self-centering claws 121 can initially clamp and fix the spline shaft 2.

[0033] By symmetrically arranging at least two sensing claws 131 on the shell 11, and using a control module to connect the second clamping jaw assembly 13 with a signal, at least two sensing claws 131 can be driven to move freely along the diameter direction of the shell 11 under the control of the control module, that is, the control module can control one of the sensing claws 131 to move toward the center of the shell 11, and at the same time control the other sensing claw 131 to move away from the center of the shell 11, thereby realizing the free movement of at least two sensing claws 131. When there is an iron lump 21 on the surface of the spline shaft 2, by controlling at least two sensing claws 131 to move toward the center of the spline shaft 2 separately, when one of the sensing claws 131 contacts the iron lump 21, it stops moving immediately until the other sensing claw 131 contacts the spline shaft 2, and then controls at least two sensing claws 131 to move toward the center of the spline shaft 2 at the same time to clamp the spline shaft 2.

[0034] The control module includes any one of physical control buttons or programming language control to realize the control of the self-centering claw 121 and the induction claw 131 .

[0035] See also Figure 4-Figure 6 , Figure 4 This is a schematic diagram of a first state of a turning fixture 1 clamping a spline shaft 2 provided by an embodiment of the utility model; Figure 5 This is a schematic diagram of a second state of the turning fixture 1 provided by the embodiment of the utility model clamping the spline shaft 2; Figure 6 1 is a schematic diagram of a third state of the turning fixture 1 provided by the embodiment of the utility model clamping the spline shaft 2. In the embodiment of the utility model, the number of the induction claws 131 is two, such as Figure 4 As shown, when the turning fixture 1 is used to clamp the spline shaft 2 with the iron lump 21, one side of the iron lump 21 is first rotated to a position corresponding to the quasi-sensing claw 131, and then the upper and lower self-centering claws 121 are controlled to move synchronously through the control module, and the two self-centering claws 121 are clamped on the surface of the spline shaft 2 to achieve preliminary fixation of the spline shaft 2, as shown in FIG. Figure 5 As shown, after the two self-centering claws 121 are clamped on the surface of the spline shaft 2, the two induction claws 131 are controlled by the control module to move synchronously toward the direction of the spline shaft 2 until the left induction claw 131 contacts the iron lump 21 first and then randomly stops driving the left induction claw 131 to continue moving. Figure 6 As shown, when the sensing claw 131 on the left first contacts the iron lump 21 and stops moving, the control module continues to control the sensing claw 131 on the right to continue moving toward the spline shaft 2 until the sensing claw 131 on the right contacts the spline shaft 2. Finally, the control module controls the two sensing claws 131 to move toward the spline shaft 2 at the same time to clamp the spline shaft 2, thereby clamping and fixing the spline shaft 2 with the iron lump 21.

[0036] In the embodiment of the present utility model, the number of the self-centering claws 121 is two, and the number of the sensing claws 131 is 2n times the number of the self-centering claws 121 , where n is a positive integer.

[0037] The number of the self-centering claws 121 is set to two, so that the spline shaft 2 can be initially clamped and fixed by the two self-centering claws 121, so that the subsequent induction claws 131 can clamp and fix the spline shaft 2 for the second time. By setting the number of the induction claws 131 to 2n times the self-centering claws 121, the force applied by the induction claws 131 when clamping the spline shaft 2 can be more uniform, thereby avoiding uneven force on the spline shaft 2 and causing displacement of the spline shaft 2.

[0038] like Figure 4 As shown, when n=1, that is, the number of the sensing claws 131 is 2, the self-centering claws 121 and the sensing claws 131 are distributed around the shell 11 at a 90° interval, so that the two self-centering claws 121 clamp the upper and lower sides of the spline shaft 2, and the two sensing claws 131 clamp the left and right sides of the spline shaft 2.

[0039] In the embodiment of the present invention, when n is greater than or equal to 2, the angles between adjacent sensing claws 131 and the angles between adjacent sensing claws 131 and the self-centering claw 121 are equal.

[0040] See also Figure 7 , Figure 7 It is a schematic diagram of the state of the turning fixture 1 clamping the spline shaft 2 provided by another embodiment of the utility model. When n=2, that is, the number of the induction claws 131 is 4, the angles between adjacent induction claws 131 and the angles between adjacent induction claws 131 and the self-centering claws 121 are equal, that is, the angle between each adjacent claw is 60°, so that the two self-centering claws clamp the upper and lower sides of the spline shaft 2, and the four induction claws 131 clamp the two sides of the spline shaft 2, thereby improving the clamping stability of the turning fixture 1 on the spline shaft 2.

[0041] In the embodiment of the present utility model, the turning fixture 1 further comprises a force control sensing module connected to the second clamping jaw assembly 13 by signal, so as to sense the clamping force of the sensing jaw 131 .

[0042] By connecting the force control sensing module with the signal of the second clamping jaw assembly 13, the clamping force of the sensing claw 131 on the spline shaft 2 can be sensed under the action of the force control sensing module, thereby ensuring that the clamping force of the sensing claw 131 on the spline shaft 2 in the same diameter direction is equal, avoiding the spline shaft 2 from being clamped off-center due to different clamping forces.

[0043] The force control sensing module includes any one of a pressure sensor and a piezoresistor, and the signal connection method between the force control sensing module and the second clamping jaw assembly 13 includes a wired signal connection and a wireless signal connection.

[0044] In an embodiment of the utility model, the first clamping jaw assembly 12 includes a first driving member 122, a first gear 123 and a driving disk 124. The driving disk 124 is arranged in the housing 11 and a transmission gear 125 is arranged on one side thereof, and a spirally distributed slot 126 is opened on the other side. The first gear 123 is fixed on the first driving member 122 and meshes with the transmission gear 125. The self-centering clamping jaw 121 is provided with a clamping tooth 127 that meshes with the clamping slot 126.

[0045] By arranging the driving disk 124 in the shell 11 and arranging a transmission gear 125 on one side of the driving disk 124, when the first driving member 122 drives the first gear 123 to rotate, the first gear 123 can drive the transmission gear 125 to rotate, thereby causing the driving disk 124 to rotate. Since a spiral groove 126 is provided on the side of the driving disk 124 away from the transmission gear 125, and a tooth 127 meshing with the groove 126 is provided on the self-centering claw 121, when the driving disk 124 rotates, the two self-centering claws 121 can be driven to move synchronously relative to each other under the action of the groove 126, that is, the two self-centering claws 121 move toward the center of the shell 11 at the same time or move away from the center of the shell 11 at the same time.

[0046] In an embodiment of the utility model, the second clamping jaw assembly 13 includes a second driving member 132 and a second gear 133, a rack 134 is provided on one side of the sensing claw 131, the second driving member 132 is fixed on the shell 11, and the second gear 133 is fixed on the second driving member 132 and meshes with the rack 134; the number of the second driving members 132 and the second gear 133 is equal to the number of the sensing claws 131.

[0047] By fixing the second driving member 132 on the shell 11 and connecting it to the second gear 133, a rack 134 meshing with the second gear 133 is provided on one side of the sensing claw 131, so that when the second driving member 132 drives the second gear 133 to rotate, the rack 134 can be driven to move, that is, the sensing claw 131 can be driven to move toward the center of the shell 11 or away from the center of the shell 11.

[0048] Since the number of second driving members 132 and second gears 133 is equal to the number of sensing claws 131, that is, each sensing claw 131 is connected to the corresponding second driving member 132 through the corresponding second gear 133, the corresponding second gear 133 can be driven to rotate under the drive of each second driving member 132, thereby realizing the individual control of each sensing claw 131, that is, individually controlling at least two sensing claws 131 to move freely along the diameter direction of the shell 11.

[0049] In the embodiment of the utility model, a protruding clamping portion 111 is provided on the housing 11 , and the second clamping jaw assembly 13 further includes a protective shell 135 , which is fixed on the housing 11 to accommodate the second driving member 132 and the second gear 133 .

[0050] By fixing the protective shell 135 on the housing 11 to accommodate the second driving member 132 and the second gear 133, it is possible to prevent dust and stains in the environment from adhering to the second gear 133 or the second driving member 132, thereby preventing the second driving member 132 from smoothly driving the second gear 133 to rotate.

[0051] In the embodiment of the utility model, a clamping portion 111 which is concentric with the housing 11 is disposed on the housing 11 , and a receiving area for receiving the first clamping jaw assembly 12 is formed inside the clamping portion 111 .

[0052] By providing a clamping portion 111 concentric with the shell 11 on the shell 11, the chuck on the lathe can clamp the clamping portion 111, so that the spline shaft 2 can be clamped by the turning fixture 1, and the turning fixture 1 is driven to rotate when the lathe chuck rotates, so that the turning tool can perform turning operations on the spline shaft 2 clamped on the turning fixture 1.

[0053] In the embodiment of the present utility model, the surfaces of the self-centering claws 121 and the induction claws 131 that clamp the spline shaft 2 are provided with anti-slip grooves.

[0054] By providing anti-skid patterns on the self-centering jaws 121 and the sensing jaws 131 , when the turning fixture 1 clamps the spline shaft 2 , the anti-skid patterns can be designed to increase the clamping friction force on the spline shaft 2 and prevent the clamped spline shaft 2 from loosening.

[0055] In order to solve the technical problems in the prior art, the utility model further provides a turning system for a spline shaft. The turning system comprises a lathe and the turning fixture 1 mentioned above. The lathe comprises a chuck for clamping the turning fixture 1 .

[0056] When performing turning operation on the spline shaft 2, the turning fixture 1 is clamped by the chuck, and the spline shaft 2 is clamped by the turning fixture 1, so that the rotation of the chuck can be controlled under the operation of the lathe, and the turning fixture 1 rotates synchronously with the chuck, and then the turning operation of the spline shaft 2 can be achieved by operating the movement of the turning tool on the lathe.

[0057] By symmetrically arranging two self-centering claws 121 on the shell 11, and using a control module to connect the signal with the first clamping jaw assembly 12, the two self-centering claws 121 can be driven to move relative to each other along the diameter direction of the shell 11 under the control of the control module. That is, the control module can control the two self-centering claws 121 to move toward the center direction of the shell 11 at the same time or move away from the center direction of the shell 11 at the same time, so that the two self-centering claws 121 can clamp or release the spline shaft 2 in the same diameter direction together. After clamping the spline shaft 2, the two self-centering claws 121 can initially clamp and fix the spline shaft 2.

[0058] By symmetrically arranging at least two sensing claws 131 on the shell 11, and using a control module to connect the second clamping jaw assembly 13 with a signal, at least two sensing claws 131 can be driven to move freely along the diameter direction of the shell 11 under the control of the control module, that is, the control module can control one of the sensing claws 131 to move toward the center of the shell 11, and at the same time control the other sensing claw 131 to move away from the center of the shell 11, thereby realizing the free movement of at least two sensing claws 131. When there is an iron lump 21 on the surface of the spline shaft 2, by controlling at least two sensing claws 131 to move toward the center of the spline shaft 2 separately, when one of the sensing claws 131 contacts the iron lump 21, it stops moving immediately until the other sensing claw 131 contacts the spline shaft 2, and then controls at least two sensing claws 131 to move toward the center of the spline shaft 2 at the same time to clamp the spline shaft 2.

[0059] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

[0061] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A turning fixture for a spline shaft, characterized in that: The turning fixture comprises a housing, a first clamping jaw assembly, a second clamping jaw assembly and a control module; The first clamping jaw assembly includes two self-centering clamping jaws symmetrically arranged on the housing; The second clamping jaw assembly includes at least two induction clamping jaws symmetrically arranged on the housing; The control module is connected to the first clamping jaw assembly by signal so as to synchronously control the two self-centering clamping jaws to move relative to each other along the diameter direction of the housing; The control module is connected to the second clamping jaw assembly by signal so as to independently control at least two of the sensing jaws to move freely along the diameter direction of the shell.

2. The turning fixture for a spline shaft according to claim 1, characterized in that: The number of the self-centering claws is two, and the number of the induction claws is 2n times the number of the self-centering claws, wherein n is a positive integer.

3. The turning fixture for a spline shaft according to claim 2, characterized in that: When n is greater than or equal to 2, the angles between adjacent sensing jaws and the angles between adjacent sensing jaws and the self-centering jaw are equal.

4. The turning fixture for a spline shaft according to claim 1, characterized in that: The turning fixture also includes a force control sensing module connected to the second clamping jaw assembly signal to sense the clamping force of the sensing jaw.

5. The turning fixture for a spline shaft according to claim 1, characterized in that: The first clamping jaw assembly includes a first driving member, a first gear and a driving disk. The driving disk is arranged in the shell and has a transmission gear on one side and a spirally distributed slot on the other side. The first gear is fixed to the first driving member and meshes with the transmission gear. The self-centering clamping jaw is provided with a tooth that meshes with the slot.

6. The turning fixture for a spline shaft according to claim 1, characterized in that: The second clamping jaw assembly includes a second driving member and a second gear. A rack is provided on one side of the sensing claw. The second driving member is fixed to the shell. The second gear is fixed to the second driving member and meshes with the rack. The number of the second driving members and the second gear is equal to the number of the sensing claws.

7. The turning fixture for a spline shaft according to claim 6, characterized in that: The second clamping jaw assembly further includes a protective shell, which is fixed to the housing to accommodate the second driving member and the second gear.

8. The turning fixture for a spline shaft according to claim 1, characterized in that: The housing is provided with a clamping portion which is concentric with the housing, and a receiving area for receiving the first clamping jaw assembly is formed inside the clamping portion.

9. The turning fixture for a spline shaft according to any one of claims 1 to 8, characterized in that: The surfaces of the self-centering claw and the induction claw that clamp the spline shaft are provided with anti-slip grooves.

10. A turning system for a spline shaft, characterized in that: The turning system comprises a lathe and a turning fixture as claimed in any one of claims 1 to 9, wherein the lathe comprises a chuck for clamping the turning fixture.

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