CN213998652U - Mechanical self-centering clamping tool for machining of differential mechanism - Google Patents
Mechanical self-centering clamping tool for machining of differential mechanism Download PDFInfo
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- CN213998652U CN213998652U CN202120007245.2U CN202120007245U CN213998652U CN 213998652 U CN213998652 U CN 213998652U CN 202120007245 U CN202120007245 U CN 202120007245U CN 213998652 U CN213998652 U CN 213998652U
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Abstract
The utility model discloses a mechanical self-centering clamping tool for differential machining, which comprises a tool base body, wherein a positioning taper sleeve is connected on the tool base body, an elastic opening sleeve is arranged in the positioning taper sleeve in a matching way, and a locking nut for driving the elastic opening sleeve to move is connected on the outer wall of the positioning taper sleeve in a threaded way; the tool base body is also connected with a plurality of positioning supporting seats which are uniformly distributed; still be connected with the supporting connection seat with location supporting seat looks adaptation on the frock base member, be connected with the pull rod on the supporting connection seat, the top of pull rod is connected with the threaded rod, and swing joint has the clamp plate on the threaded rod, and threaded connection has lock nut on the threaded rod of clamp plate top, and the clamp plate forms the centre gripping space that is used for the centre gripping work piece with location supporting seat top. The device has the advantages of simple and compact structure, easy use, short manufacturing period, low cost and small occupied space, greatly improves the quality of processed parts after being put into production and used, greatly reduces the rejection rate and improves the customer satisfaction.
Description
Technical Field
The utility model relates to an anchor clamps technical field, concretely relates to differential mechanism processing is with mechanical type self-centering clamping frock.
Background
In automobile parts, the differential is an important part of the automobile parts. The differential mechanism has the function of enabling the rotating speeds of wheels on two sides to be different, and the differential mechanism is used for adjusting the rotating speeds of the wheels to achieve the effect. Whether differential mechanism can reach the effect of differential in the use, mainly by the machining precision decision in the cross shaft hole in the differential mechanism casing, want to improve the machining precision in cross shaft hole, anchor clamps have played very big effect in the course of working.
Aiming at the position accuracy of the central line of the cross shaft hole in the drawing of the differential case assembly, the position degree of the central line of the cross shaft hole relative to the excircle central line reference G of the bearing retainer of the left differential case, the excircle central line reference H of the bearing retainer of the right differential case and the joint end face reference I of the left differential case and the right differential case is required to be phi 0.05, so that the requirement on the position accuracy of the central line of the cross shaft hole is met, and the design of a tool clamp is very important.
The processing precision of the tool, the positioning inner spigot precision of a special worktable of the numerical control boring machine and the fit clearance analysis and calculation after the tool and the workpiece are clamped are used at present:
1. the size of the inner spigot at the center of the rotary working table of the special numerical control boring machine is phi 50-phi 50.01, the roundness error of the inner hole is 0.01mm, and the size of the matched outer spigot of the tool and the working table is phi 50 in order to ensure the assembly of the tool and the special numerical control boring machine;
2. the size of the outer circle of a bearing stop of a right shell of the differential used for positioning the tool is phi 110, a gap must be left between the inner hole of the tool and the workpiece to ensure that the workpiece is smoothly installed in the inner hole of the tool, and the size of the inner hole matched with the workpiece of the tool is phi 110;
3. after a workpiece is loaded into the tool, the minimum clearance between the workpiece and the center positioning spigot of the rotary worktable of the special numerical control boring machine and the positioning inner hole of the tool is equal to the lower deviation 0+ of the positioning spigot of the special numerical control boring machine and the upper deviation 0+ (the lower deviation of the tool and the workpiece matching spigot is 0.075-the upper deviation of a bearing stop of a differential case) is equal to 0.03mm, and the maximum clearance between the workpiece and the center positioning spigot of the rotary worktable of the special numerical control boring machine and the positioning inner hole of the tool is equal to the upper deviation 0.01-the lower deviation-0.01 + of the tool and the special positioning spigot of the special machine (the upper deviation of the tool and the workpiece matching spigot is 0.085-the lower deviation of the bearing stop of the differential case) is equal to 0.082 mm.
Through the data analysis, the main reason that the position degree of the center line of the cross-shaped shaft hole is out of tolerance is caused by the large fit clearance between the excircle of the bearing retainer of the right shell of the differential and the special machine of the numerical control boring machine and the positioning inner hole of the tool. If the fit clearance between the tool positioning inner hole and the outer circle of the bearing retainer of the right shell of the differential is too small, the workpiece is not easy to be arranged in the tool inner hole, the auxiliary time is increased, and the production efficiency is low. The workpiece and the tool positioning inner hole are collided during clamping, so that the inner hole is collided and damaged, the centering precision is reduced, and the factor is also the factor causing the position degree of the center line of the cross shaft hole to be out of tolerance.
The analysis shows that the gap is reserved between the bearing retainer excircle of the right differential shell and the tool inner hole, so that the position degree phi 0.05 of the central line of the phi 34 cross shaft hole of the machined workpiece relative to the reference I, H, G can not be basically ensured, and the position degree of the central line of the phi 34 cross shaft hole detected by the three-coordinate measuring machine is 0.07-0.08mm, so that the rejection rate of the workpiece is high.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the mechanical self-centering clamping tool for machining the differential mechanism is provided, is used for eliminating the influence of the size deviation of workpiece machining on the machining precision of the cross-shaped shaft hole, and improves the machining precision of the cross-shaped shaft hole. The device has simple and compact structure, easy use, short manufacturing period and low cost, and occupies small space because of no other auxiliary devices.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model provides a mechanical self-centering clamping tool for differential machining, which comprises a tool base body, wherein a positioning taper sleeve is connected on the tool base body, an elastic opening sleeve is arranged in the positioning taper sleeve in a matching way, and a locking nut for driving the elastic opening sleeve to move is connected on the outer wall of the positioning taper sleeve in a threaded way; the tool base body is also connected with a plurality of positioning supporting seats which are uniformly distributed; the tool base body is further connected with a supporting and connecting seat matched with the positioning and supporting seat, the supporting and connecting seat is connected with a pull rod, the top of the pull rod is connected with a threaded rod, a pressing plate is movably connected onto the threaded rod, a fastening nut is connected onto the threaded rod above the pressing plate in a threaded mode, and a clamping space used for clamping a workpiece is formed in the top end of the pressing plate and the top end of the positioning and supporting seat.
Preferably, the supporting and connecting seat is further connected with a supporting rod, the supporting rod is arranged below the pressing plate, and when the pressing plate is used, two ends of the pressing plate respectively act on the top end of the supporting rod and the top end of the positioning and supporting seat.
Preferably, a circle of sliding groove is formed in the outer wall of the elastic opening sleeve, a boss is arranged on the inner wall of the locking nut, and the boss is movably inserted into the sliding groove.
Preferably, the number of the positioning supporting seats is 4.
Preferably, the tool base body is further provided with a drainage chip groove.
Compared with the prior art, the beneficial effects of the utility model are that:
when the device is used, the positioning support seats are fastened on a tool base body, four positioning support seats are processed, the process size is ensured, the heights of the positioning support seats are consistent, the tool base body is connected with the positioning taper sleeve through bolts, an outer spigot of the positioning taper sleeve is connected with an inner spigot of a special boring machine, the elastic opening sleeve is combined with a conical surface of the positioning taper sleeve, the locking nut is connected with the positioning taper sleeve through threads, the locking nut is rotated in the using process, the inner conical surface of the locking nut is contacted with the outer conical surface of the elastic opening sleeve to clamp a workpiece, automatic centering work is completed, the supporting connection seat is fastened on the tool base body, the supporting rod and the pull rod are fastened on the supporting connection seat, and the workpiece is pressed by the pressing plate through the fastening nut to complete clamping of the workpiece; the clamp and the workpiece are in full contact, so that a clamping gap between the tool and the workpiece is eliminated, the quality of a processed part is greatly improved after the clamp is put into production, and the position degree of the central line of the cross-shaped shaft hole of the differential case assembly is 0.03-0.04mm through detection of a three-coordinate measuring machine, so that the drawing requirements are met, waste products are greatly reduced, and the customer satisfaction is improved.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view of the present invention.
Fig. 3 is an enlarged schematic view of fig. 2.
Fig. 4 is a schematic structural view in the use state of the present invention.
Description of reference numerals:
1, a tool base body, 2, a positioning taper sleeve, 3, an elastic opening sleeve, 4, a locking nut, 5, a supporting and connecting seat, 6, a positioning and supporting seat, 7, a supporting rod, 8, a pull rod, 9, 10, a fastening nut and 11 threaded rods; 12 a first tapered surface; 13 a second tapered surface; 14 bosses; 15 chute; 16 drainage chip grooves.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
Example one
As shown in fig. 1-4, the mechanical self-centering clamping tool for processing a differential mechanism provided in this embodiment includes a tool base 1, a positioning taper sleeve 2 is connected to the tool base 1, the tool base 1 is circular, the positioning taper sleeve 2 is disposed at a center position of the tool base 1, an elastic opening sleeve 3 is disposed in the positioning taper sleeve 2 in a matching manner, and an inner wall of the positioning taper sleeve 2 is attached to an outer wall of the elastic opening sleeve 3 and has a second taper surface 13; the second conical surface 13 is of a structure with a wide upper part and a narrow lower part, so that when the elastic opening sleeve 3 moves downwards relatively along the positioning taper sleeve 2, the elastic opening sleeve 3 can be tightened; the outer wall of the positioning taper sleeve 2 is in threaded connection with a locking nut 4 for driving the elastic opening sleeve 3 to move; the outer wall of the elastic opening sleeve 3 and the inner wall of the locking nut 4 are provided with first conical surfaces 12 which are matched, and the first conical surfaces 12 are of structures with narrow tops and wide bottoms; when the clamping device is used, the locking nut 4 can drive the elastic opening sleeve 3 to move downwards through the first conical surface 12 by rotating the locking nut 4, and when the elastic opening sleeve 3 moves downwards, the elastic opening sleeve 3 can be tightened up due to the arrangement of the second conical surface 13, so that a workpiece is clamped.
The tool base body 1 is also connected with a plurality of positioning supporting seats 6 which are uniformly distributed, the positioning supporting seats 6 play a role in supporting workpieces, and the number of the positioning supporting seats 6 is 4; the tool base body 1 is also connected with a supporting and connecting seat 5 matched with the positioning and supporting seat 6, the supporting and connecting seat 5 is connected with a pull rod 8, the top of the pull rod 8 is connected with a threaded rod 11, and the pull rod 8 can be directly welded with the threaded rod 11; the threaded rod 11 is movably connected with a pressing plate 9, a hole is formed in the pressing plate 9, the threaded rod 11 freely penetrates through the hole, the pressing plate 9 can move up and down along the threaded rod 11, a fastening nut 10 is connected onto the threaded rod 11 in a threaded mode above the pressing plate 9, and a clamping space used for clamping a workpiece is formed between the pressing plate 9 and the top end of the positioning support seat 6. Still be connected with bracing piece 7 on the supporting connection seat 5, bracing piece 7 sets up in the below of clamp plate 9, and when using, the both ends of clamp plate 9 act on 7 tops of bracing piece and 6 tops of location supporting seat respectively.
The setting of bracing piece 7 can provide the holding power for clamp plate 9, just so can make clamp plate 9 both ends atress, improves stability, prevents to appear clamp plate 9 because of the great easy problem of damaging of single-ended atress.
Still seted up drainage chip groove 16 on the frock base member 1, the convenient clearance.
The working principle is as follows:
1. clamping process
Firstly, a part is placed on a positioning support seat 6 and clamped in an elastic opening sleeve 3, a locking nut 4 is rotated, the diameter of the elastic opening sleeve 3 is gradually reduced under the action of the positioning taper sleeve 2 and the elastic opening sleeve 3 due to taper centering of the positioning taper sleeve 2 and the elastic opening sleeve 3, the locking nut 4 is rotated, and the elastic opening sleeve 3 starts to be in contact positioning with the part, so that self-centering clamping is realized; then one end of a pressure plate 9 is placed on the surface of the part, the other end of the pressure plate is placed above the supporting rod 7, a fastening nut 10 on a threaded rod 11 is screwed, the workpiece is pressed tightly, the workpiece is axially clamped, and the workpiece is clamped.
2. Process for unloading workpieces
After the processing is finished, the locking nut 4 is rotated anticlockwise, the locking nut 4 drives the elastic opening sleeve 3, the elastic opening sleeve 3 is opened outwards, after the clamping force is loosened slowly, the fastening nut 10 above the pressing plate 9 is loosened, the part is taken down, and the working procedure processing is finished.
Example two
On the basis of the first embodiment, a circle of sliding groove 15 is formed in the outer wall of the elastic opening sleeve 3, a boss 14 is arranged on the inner wall of the locking nut 4, and the boss 14 is movably inserted into the sliding groove 15. When the locking nut 4 is rotated, the boss 14 also slides in the sliding groove 15; the arrangement of the lug boss 14 and the sliding groove 15 is to ensure that when the locking nut 4 is loosened in the process of unloading workpieces, the elastic opening sleeve 3 can move upwards along with the locking nut 4, so that the problem that the locking nut 4 is loosened and the elastic opening sleeve 3 cannot reset due to being clamped in the positioning taper sleeve 2 too tightly can be solved, and the next normal use can be ensured.
When the device is used, the positioning support seats 6 are fastened on the tool base body 1, four positioning support seats 6 are machined, the process size is guaranteed, the heights of the positioning support seats 6 are consistent, and the tool base body 1 and the positioning taper sleeve 2 are connected through bolts, so that the device is convenient to disassemble; the outer spigot of the positioning taper sleeve 2 is connected with the inner spigot of the special boring machine, the elastic opening sleeve 3 is combined with the inner conical surface of the positioning taper sleeve 2, the locking nut 4 is connected with the positioning taper sleeve 2 through threads, the locking nut 4 is rotated in the using process, the inner conical surface of the locking nut 4 is contacted with the outer conical surface of the elastic opening sleeve 3 and then clamps a workpiece, the automatic centering work is completed, the supporting and connecting seat 5 is fastened on the tool base body 1, the supporting rod 7 and the pull rod 8 are fastened on the supporting and connecting seat 5, and the pressing plate 9 presses the workpiece through the fastening nut 10 to complete the clamping of the workpiece; the clamp and the workpiece are in full contact, so that a clamping gap between the tool and the workpiece is eliminated, the quality of a processed part is greatly improved after the clamp is put into production, and the position degree of the central line of the cross-shaped shaft hole of the differential case assembly is 0.03-0.04mm through detection of a three-coordinate measuring machine, so that the drawing requirements are met, waste products are greatly reduced, and the customer satisfaction is improved.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. A mechanical self-centering clamping tool for machining a differential mechanism comprises a tool base body and is characterized in that a positioning taper sleeve is connected onto the tool base body, an elastic opening sleeve is arranged in the positioning taper sleeve in a matched mode, and a locking nut used for driving the elastic opening sleeve to move is connected onto the outer wall of the positioning taper sleeve in a threaded mode; the tool base body is also connected with a plurality of positioning supporting seats which are uniformly distributed; the tool base body is further connected with a supporting and connecting seat matched with the positioning and supporting seat, the supporting and connecting seat is connected with a pull rod, the top of the pull rod is connected with a threaded rod, a pressing plate is movably connected onto the threaded rod, a locking nut is connected onto the threaded rod above the pressing plate in a threaded mode, and a clamping space used for clamping a workpiece is formed in the top end of the positioning and supporting seat.
2. The mechanical self-centering clamping tool for differential machining according to claim 1, wherein a support rod is further connected to the support connection seat, the support rod is disposed below the pressing plate, and when in use, two ends of the pressing plate respectively act on top ends of the support rod and top ends of the positioning support seats.
3. The mechanical self-centering clamping tool for machining the differential mechanism according to claim 1, wherein a circle of sliding groove is formed in the outer wall of the elastic opening sleeve, and a boss is arranged on the inner wall of the locking nut and movably inserted into the sliding groove.
4. The mechanical self-centering clamping tool for differential machining according to claim 1, wherein the number of the positioning support seats is 4.
5. The mechanical self-centering clamping tool for machining the differential mechanism according to claim 1, wherein a drainage chip groove is further formed in the tool base body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120007245.2U CN213998652U (en) | 2021-01-04 | 2021-01-04 | Mechanical self-centering clamping tool for machining of differential mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120007245.2U CN213998652U (en) | 2021-01-04 | 2021-01-04 | Mechanical self-centering clamping tool for machining of differential mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213998652U true CN213998652U (en) | 2021-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120007245.2U Active CN213998652U (en) | 2021-01-04 | 2021-01-04 | Mechanical self-centering clamping tool for machining of differential mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213998652U (en) |
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2021
- 2021-01-04 CN CN202120007245.2U patent/CN213998652U/en active Active
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Address after: No.366 Huatai Road, new material industrial park, Jinan City, Shandong Province Patentee after: Shandong Xinzhong'an Intelligent Manufacturing Co.,Ltd. Address before: No.366 Huatai Road, new material industrial park, Jinan City, Shandong Province Patentee before: Shandong Xinzhong Heavy Duty Truck Parts Manufacturing Co.,Ltd. |