Side punching die, clutch outer ring machined through side punching die and clutch mechanism of washing machine

Abstract

The utility model discloses a side punching die, a clutch outer ring processed by the side punching die and a clutch mechanism of a washing machine, and the side punching die comprises an inner hole positioning assembly which comprises a positioning seat suitable for being embedded in an inner hole of an annular product and a plurality of concave grooves formed in the outer side wall of the positioning seat at intervals in the circumferential direction, the concave die blocks are suitable for being detachably inserted into the concave grooves in a one-to-one mode; a through hole extending in the radial direction of the annular product is formed in each female die block; a receding groove which is formed in the axial direction of the circular-ring-shaped product and communicates with the penetrating hole is further formed in the side wall face, facing the circular-ring-shaped product, of each female die block. The outer wall positioning assembly comprises a positioning ring suitable for being wound on the outer side wall of the annular product and punching needle holes formed in the positioning ring and suitable for being in one-to-one correspondence with the penetrating holes of the multiple female die blocks. The punching needle comprises a needle body suitable for sequentially penetrating through the punching needle hole and the side wall of the annular product and then being inserted into the penetrating hole.

Description

Technical Field

[0001] The utility model relates to the field of household appliance processing, in particular to a side punching die, a clutch outer ring processed by using the same, and a clutch mechanism of a washing machine. Background Art

[0002] The drive system of a washing machine mainly includes a motor, a housing, a clutch mechanism, a drive shaft, and a drive shaft sleeve. Among them, the drive shaft is rotatably arranged in the drive shaft sleeve, the lower end of the drive shaft is connected to the motor, the upper end of the drive shaft is connected to a washing machine impeller or agitator, and the drive shaft sleeve is fixedly connected to the inner barrel of the washing machine. The clutch mechanism is connected to the motor and is used to control whether the output power of the motor is transmitted to the drive shaft sleeve.

[0003] In the prior art, for the clutch mechanism applied in the drive system of a washing machine, for example, there is no circumferential positioning structure between the clutch outer ring and the clutch inner tooth member of the washing machine drive mechanism and the clutch assembly disclosed in the publication number CN103437126A. Therefore, there is a phenomenon of noise generation during the dehydration drive of the washing machine.

[0004] Based on the above situation, for another example, in the solution disclosed in the publication number CN205603892U, at least one shaft hole fitting positioning mechanism for restricting the relative rotation between the clutch inner tooth member and the clutch outer ring is provided between the peripheral wall of the clutch inner tooth member and the clutch outer ring to solve the noise problem during the dehydration drive of the washing machine. However, through actual research and use, as shown in Figure 1 During the punching process of the positioning hole of the clutch outer ring 2, a punching burr surface 3 perpendicular to the axis of the punching hole will be generated. The existence of the punching burr surface 3 will cause the problem of broken positioning posts 11 in the circumferential direction of the clutch inner tooth member 1, resulting in the phenomenon of relative rotation or even separation between the clutch outer ring 2 and the clutch inner tooth member 1, thus bringing problems such as jamming or even clutch failure during the dehydration drive of the washing machine. In addition, combined with the unreasonable cone angle and length dimensions of the conical hole on the clutch outer ring of the coupling, it will further lead to the serious quality problem of the separation between the clutch outer ring and the clutch inner tooth member, and further there is the failure problem that the washing machine cannot perform dehydration drive.

[0005] Therefore, in view of the problems existing in the use of the clutch assembly in several existing public technologies, it is necessary to further optimize the cooperation structure between the clutch outer ring and the clutch inner tooth member. Content of the Utility Model

[0006] The first object of the utility model is to provide a side punching die to solve the technical problem of preventing punching burrs perpendicular to the axis of the punching hole from being generated during the punching process of the punching hole.

[0007] The second purpose of the utility model is to provide a clutch outer ring to solve the technical problem of preventing the punching holes of the clutch outer ring from generating punching burrs perpendicular to the axis line of the punching holes during the punching process.

[0008] The third object of the utility model is to provide a clutch mechanism for a washing machine to solve the technical problem of improving the stability of the washing machine in use.

[0009] The side punching die of the utility model is realized as follows:

[0010] A side punching die, suitable for side punching processing of annular products, comprising: suitable for side punching processing of annular products, characterized in that it comprises:

[0011] An inner hole positioning assembly, comprising a positioning seat suitable for being embedded in the inner hole of a circular ring-shaped product, a plurality of recessed grooves arranged on the outer side wall of the positioning seat at intervals along the circumferential direction, and a plurality of concave modules suitable for being detachably inserted into the plurality of recessed grooves one by one; a through hole extending along the radial direction of the circular ring-shaped product is formed on each concave module; and a clearance groove arranged along the axial direction of the circular ring-shaped product and communicating with the through hole is also provided on the side wall surface of each concave module facing the circular ring-shaped product; the two ends of the clearance groove extend to one of the axial side ends of the concave module;

[0012] An outer wall positioning assembly, comprising a positioning ring suitable for wrapping around the outer side wall of the annular product, and punching pin holes provided on the positioning ring and suitable for one-to-one correspondence with the perforations of the plurality of concave modules;

[0013] The punching needle comprises a needle body which is suitable for sequentially passing through the punching needle hole and the side wall of the annular product and then inserted into the punching hole. The needle body is suitable for forming a punching hole when passing through the side wall of the annular product.

[0014] In an optional implementation of the present invention, the bottom wall surface of the recess is a flat surface; and

[0015] The groove bottom wall surface of the relief groove is perpendicular to the central axis of the through hole.

[0016] In an optional implementation of the utility model, the cross-section of the clearance groove along the radial surface of the annular product is rectangular.

[0017] In an optional implementation of the present invention, the groove depth of the recess is H, H = 0.1-0.4 mm.

[0018] In an optional implementation of the present invention, assuming that the length of the clearance groove is B, then D≤B≤D+0.2.

[0019] In an optional implementation of the present invention, the diameter of the punching hole is larger than the diameter of the perforation; and

[0020] The needle body comprises a large outer diameter needle for adapting to the punching needle hole and a small outer diameter needle for adapting to the perforation; the outer diameter of the large outer diameter needle is greater than the outer diameter of the small outer diameter needle, so that a conical transition section is formed between the large outer diameter needle and the small outer diameter needle.

[0021] In an optional implementation of the present invention, the annular product is a full-circle integrated structure.

[0022] The clutch outer ring of the utility model is realized as follows:

[0023] A clutch outer ring comprises: an annular body and a plurality of punching holes punched on the side wall of the annular body along the circumferential direction;

[0024] Each punching hole is formed by using the side punching die;

[0025] A boss is formed on the edge of the punching hole facing the inner hole of the annular body; the boss protrudes along the axial direction of the punching hole toward the inner hole.

[0026] In an optional implementation of the utility model, the boss is waist-shaped along the axial direction of the annular body; and

[0027] Assume that the outer diameter of the major axis of the boss is D2, then D2 = 1.1D 凹 ~1.3D 凹 ; where D 凹 is the inner diameter of the perforation.

[0028] In an optional implementation of the present invention, the height of the boss relative to the edge of the punched hole is H2; then: H≤H2≤H+RR 凹 ;in

[0029] H is the depth of the recess, R is the radius of the inner hole of the annular body, R 凹 is the radius of the locating seat.

[0030] In an optional implementation of the utility model, a trumpet hole with a gradually increasing inner diameter is formed on the side of the punching hole facing away from the inner hole of the annular body;

[0031] Assume that the inner diameter of the end of the horn hole away from the inner hole of the annular body is D1, and the axial length of the horn hole is H1; then

[0032] 0.2t≤H1≤0.5t, 1.1D≤D1≤1.3D;

[0033] D is the diameter of the punched hole; t is the thickness of the side wall of the annular body.

[0034] The clutch mechanism of the washing machine of the utility model is realized as follows:

[0035] A clutch mechanism for a washing machine, comprising: the clutch outer ring, and a clutch inner tooth member adapted to be injection-molded and fixedly connected to the inner hole of the clutch outer ring; wherein

[0036] The clutch inner tooth member includes an inner tooth member body and a positioning post integrally formed with the inner tooth member body and adapted to be embedded in the punching hole.

[0037] In an alternative embodiment of the present utility model, chamfers C are respectively provided at the two axial end edges of the inner hole of the annular body of the clutch outer ring; then:

[0038] 0.07R ≤ C ≤ 0.55t; where t is the thickness of the side wall of the annular body, and R is the radius of the inner hole of the annular body.

[0039] Adopting the above technical solution, the present utility model has the following beneficial effects: The side punching die of the present utility model, the clutch outer ring processed by it, and the clutch mechanism of the washing machine, by providing a relief groove on the concave module of the side punching die, make a circular product such as the clutch outer ring in the present application form a boss on the edge of the punching hole during the punching process, rather than directly forming a burr surface. In this way, not only will a sharp fracture surface not be formed between the clutch outer ring and the positioning post of the clutch inner tooth member, but on the contrary, the injection strength between the clutch outer ring and the clutch inner tooth member is enhanced through the boss, thereby avoiding the problem of column breakage in the circumferential direction of the clutch inner tooth member and resulting in jamming and failure during the dehydration drive of the washing machine. Description of the Drawings

[0040] Figure 1 It is a schematic diagram of the cooperation between the clutch outer ring and the clutch inner tooth member of the clutch mechanism of a washing machine in the prior art;

[0041] Figure 2 It is an exploded structural schematic diagram of the side punching die of the present utility model;

[0042] Figure 3 It is a structural schematic diagram of the inner positioning component of the side punching die of the present utility model;

[0043] Figure 4 It is a structural schematic diagram of the concave module of the inner positioning component of the side punching die of the present utility model;

[0044] Figure 5 It is a structural schematic diagram of the punching needle of the side punching die of the present utility model;

[0045] Figure 6 It is a schematic diagram of the side punching die of the present utility model before punching a circular product;

[0046] Figure 7Schematic diagram of the side punching die of the present utility model during the punching process of a circular ring-shaped product;

[0047] Figure 8 Schematic diagram of the structure of the clutch outer ring of the present utility model;

[0048] Figure 9 For Figure 8 A-direction sectional view of

[0049] Figure 10 Schematic diagram of the clutch mechanism of the washing machine of the present utility model;

[0050] Figure 11 For Figure 10 B-direction sectional view of

[0051] In the figure: clutch inner tooth part 1, clutch outer ring 2, burr surface 3, punching hole 21, convex platform 22, trumpet hole 23, positioning column 11, positioning seat 4, recessed groove 41, concave die block 5, relief groove 51, perforation 52, positioning ring 6, punching needle hole 61, limiting hole 62, needle body 7, small outer diameter needle 71, large outer diameter needle 72, conical transition section 73, limiting part 8. Specific embodiments

[0052] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments in conjunction with the accompanying drawings.

[0053] Embodiment 1:

[0054] Please refer to Figures 2 to 5 As shown, this embodiment provides a side punching die applicable to the side punching processing of circular ring-shaped products. The circular ring-shaped products here can be, for example but not limited to, the clutch outer ring 2 in the clutch mechanism of a washing machine. Regarding the circular ring-shaped products here, they can be an integral circular structure. For example, directly using formed pipe steel materials can make the processing technology simpler and the cost lower; they can also be non-integral structures, that is, as long as the products can form a circular ring shape, the side punching die of this embodiment can be used to process the punching holes 21 on the side walls.

[0055] Specifically, the side punching die adopted in this embodiment includes: an inner hole positioning component for punching and positioning the inner hole of the circular ring-shaped product and an outer wall positioning component for punching and positioning the outer side wall of the circular ring-shaped product. Through the inner hole positioning component and the outer wall positioning component, the clamping and positioning of the circular ring-shaped product are realized, so as to simultaneously perform the side punching operation in the radial direction around the circumference of the circular ring-shaped product.

[0056] Next, in detail, first is the inner hole positioning component, which includes a positioning seat 4 adapted to be embedded in the inner hole of the annular product, a plurality of recessed grooves 41 arranged at intervals along the circumferential direction on the outer side wall of the positioning seat 4, and a plurality of concave modules 5 adapted to be detachably inserted into the plurality of recessed grooves 41 one by one. Here, considering that the positioning seat 4 is to form the positioning of the inner hole of the annular product, when the recessed groove 41 and the concave module 5 are assembled in place, the concave module 5 and the positioning seat 4 as a whole form a cylindrical structure, and the outer side wall of the positioning seat 4 can be in abutting fit with the inner hole wall of the annular product. Here, the mating structure between the concave module 5 and the recessed groove 41 can optionally adopt the form of a dovetail groove, and the insertion and disassembly of the concave module 5 and the recessed groove 41 are both carried out along the axial direction of the positioning seat 4.

[0057] Furthermore, each concave module 5 is formed with a perforation 52 extending along the radial direction of the annular product; and on the side wall surface of each concave module 5 facing the annular product, there is also provided a relief groove 51 arranged along the axial direction of the annular product and communicating with the perforation 52. The two ends of the relief groove 51 respectively extend to one of the axial side ends of the concave module 5. For which specific axial side end, this embodiment does not make an absolute limitation. In this regard, in an optional implementation case, the perforation 52 is located in the middle of the relief groove 51 along the axial length of the concave module 5.

[0058] Based on the design of the relief groove 51 in the above situation, when the annular product after the side punching operation and the positioning seat 4 can be separated by relative movement in the axial direction, the punching burrs formed on the end surface of the punching hole 21 facing the positioning groove during the punching process can move along the positioning groove. Since the positioning groove provides an interval for the movement of the punching burrs, the punching burrs will not form a burr surface 3 extending into the punching hole 21 along the inner diameter direction of the punching hole 21, but can form a convex platform 22 protruding towards the inner hole side of the annular product along the axial direction of the punching hole 21. Specifically, one end of the relief groove 51 extends to one of the axial side ends of the concave module 5. When the annular product is separated from the positioning seat 4, the annular product moves towards the end of the relief groove 51 extending to the axial side end of the concave module 5, that is, the end of the relief groove 51 extending to the axial side end of the concave module 5 forms an exit for the separation of the annular product and the positioning seat 4.

[0059] Next to be described is the outer wall positioning component, which includes a positioning ring 6 adapted to surround the outer side wall of the annular product, and a punching needle hole 61 provided on the positioning ring 6 and adapted to correspond to the perforations 52 of the plurality of concave modules 5 one by one. The punching needle includes a needle body 7 adapted to sequentially pass through the punching needle hole 61 and the side wall of the annular product and then insert into the perforation 52. The needle body 7 is adapted to form a punching hole 21 when passing through the side wall of the annular product. The punching needle can be made of die steel material.

[0060] Of course, it should be noted here that in an optional implementation case, for the punching needle, it may further include a limiting portion 8 provided at one end of the needle body 7. The outer diameter d3 of the limiting portion 8 is greater than the outer diameter of the needle body 7, so that a T-shaped body is formed between the needle body 7 and the limiting portion 8. The limiting portion 8 does not actually play a role in punching the circular ring-shaped product, but only plays a role in limiting the position of the punching needle during the punching process. Correspondingly, for the positioning ring 6, a limiting hole 62 communicating with the through hole 52 and adapted to the limiting portion 8 is formed inside it. The inner diameter of the limiting hole 62 is greater than the inner diameter of the punching hole 21, so that the limiting portion 8 will not enter the punching needle hole 61 during the punching process along with the overall punching needle.

[0061] Based on the above structure, next, regarding the relief groove 51 in this embodiment, taking an implementation case as an example with reference to the accompanying drawings, the bottom wall surface of the relief groove 51 is a flat surface; and the bottom wall surface of the relief groove 51 is perpendicular to the central axis of the through hole 52. Of course, the flat surface here can also be replaced by an arc surface. This embodiment does not make an absolute limitation on this, nor will it list them one by one.

[0062] Based on the case where the bottom wall surface of the relief groove 51 is a flat surface, in an optional implementation manner, the cross-section of the overall relief groove 51 along the radial plane of the circular ring-shaped product is a rectangle. In this regard, let the groove depth of the relief groove 51 be H; H = 0.1 - 0.4 mm.

[0063] Based on the above structure, furthermore, let the length of the relief groove 51 be B; considering the service life of the concave die block 5 and the punching needle, then D ≤ B ≤ D + 0.2. Optionally, the center of the length direction of the relief groove 51 coincides with the center of the punching hole 21.

[0064] In addition, regarding the punching needle hole 61 adopted in this embodiment, it should be further noted that the aperture of the punching needle hole 61 is greater than the aperture of the through hole 52; and the needle body 7 includes a large outer diameter needle 72 adapted to the punching needle hole 61 and a small outer diameter needle 71 adapted to the through hole 52; the outer diameter d2 of the large outer diameter needle 72 is greater than the outer diameter d of the small outer diameter needle 71, so that a conical transition section 73 is formed between the large outer diameter needle 72 and the small outer diameter needle 71, and the outer diameter of the conical transition section 73 is d1. Furthermore, let the axial length of the limiting portion 8 be B4, the axial length of the large outer diameter needle 72 be B3, the axial length of the small outer diameter needle 71 be B1, the axial length of the conical transition section 73 be B2, d = D (D is the aperture of the punching hole 21); d1 = D1 (D1 is the inner diameter of the end of the flared hole 23 away from the inner hole of the circular ring-shaped product); B2 = H1 (the axial length of the flared hole 23 is H1).

[0065] The punch hole 61 with this structure is mainly used to form a trumpet-shaped hole 23 in the punching hole 21 of the annular product. Specifically, when the punching needle with this structure punches the annular product, as the needle body 7 is successively inserted into the punch hole 61, the annular product, and the perforation 52, the conical transition section 73 just forms the trumpet-shaped hole 23 at the side end of the punching hole 21 formed on the annular product and facing away from the concave die block 5. In this way, for the processing of the annular product, only one punching is required to integrally process and form a cylindrical punching hole 21, a trumpet-shaped hole 23 located on one side of the punching hole 21, and a boss 22 located on the other side of the punching hole 21 and with the edge protruding towards the inner hole of the annular product. Using a set of side punching dies, one-time processing and forming can be achieved, with high processing efficiency and low processing cost.

[0066] Embodiment 2:

[0067] Please refer to Figures 2 to 11 As shown, on the basis of the side punching die of Embodiment 1, this embodiment provides a clutch outer ring 2, including: an annular body and a plurality of punching holes 21 punched and formed on the side wall of the annular body along the circumferential direction; each punching hole 21 is processed and formed by using the side punching die of Embodiment 1. The clutch outer ring 2 of this embodiment can use a magnetically conductive material such as ordinary steel material, and a formed pipe can be directly used to make it an annular product.

[0068] The clutch outer ring 2 in this embodiment is essentially an annular product. Therefore, when the side punching die of Embodiment 1 is used to process the clutch outer ring 2 in this embodiment, it can be understood that the clutch outer ring 2 at this time is the annular product of Embodiment 1. Therefore, the punching hole 21 formed on the clutch outer ring 2 by using the side punching die of Embodiment 1 includes a cylindrical punching hole 21, a trumpet-shaped hole 23 located on one side of the punching hole 21, and a boss 22 located on the other side of the punching hole 21 and with the edge protruding towards the inner hole of the annular product.

[0069] Based on the above situation, it should also be noted that for the punching holes 21, trumpet-shaped holes 23, and bosses 22 punched and formed on the clutch outer ring 2, it is preferably in the middle position of the axial height of the clutch outer ring 2, and the deformation caused by the corresponding punching stress is small and the processing accuracy is high. Of course, two rows of punching holes 21 distributed axially can also be punched and formed on the outer circle of the clutch at this time. The two rows of punching holes 21 can be distributed axially and directly opposite, or can be distributed axially and offset. This embodiment does not make an absolute limitation on this.

[0070] The trumpet-shaped hole 23 formed by punching can eliminate the stress generated when the injection-molded material contracts due to high and low temperatures, so that the stress is reduced to a very small value or completely eliminated; at the same time, it can also generate a certain holding force between the inner clutch gear 1 and the outer clutch ring 2 in the radial direction, ensuring the concentricity of the mating structure formed by the inner clutch gear 1 and the outer clutch ring 2.

[0071] Next, the specific boss 22 and trumpet-shaped hole 23 will be described. First, the boss 22:

[0072] In terms of shape, the boss 22 is waist-shaped along the axial direction of the circular ring-shaped body; based on the boss 22 with this shape, let the outer diameter of the long axis of the boss 22 be D2, then D2 = 1.1D 凹 ~1.3D 凹 ; where D 凹 is the inner diameter of the perforation 52. Let the height of the boss 22 protruding from the hole edge of the punching hole 21 be H2; then H ≤ H2 ≤ H + R - R 凹 ; where H is the depth of the relief groove 51, R is the radius of the inner hole of the circular ring-shaped body, and R 凹 is the radius of the positioning seat 4. H is usually in the range of 0.1 - 0.4 mm, and H2 is generally in the range of 0.15 - 0.5 mm.

[0073] Secondly, for the trumpet-shaped hole 23, the trumpet-shaped hole 23 has a structure with an increasingly enlarged inner diameter from the cylindrical punching hole 21 towards the side away from the inner hole of the circular ring-shaped body. Based on this structure, let the inner diameter of the end of the trumpet-shaped hole 23 far from the inner hole of the circular ring-shaped body (i.e., the maximum inner diameter of the entire trumpet-shaped hole 23) be D1, and the axial length of the trumpet-shaped hole 23 be H1; then 0.2t ≤ H1 ≤ 0.5t, 1.1D ≤ D1 ≤ 1.3D; where D is the aperture of the punching hole 21; and t is the thickness of the side wall of the circular ring-shaped body.

[0074] For the clutch mechanism of the washing machine using the outer clutch ring 2 of this embodiment, it has been found through experiments that when there is a boss 22 formed on the edge of the punching hole 21 of the outer clutch ring 2, the strength between the outer clutch ring 2 and the inner clutch gear 1 of the clutch mechanism can be increased by 56.7% compared to the case without this structure; the aging experiment at 125°C / 200 hours passes 100%; the 2-hour cold and hot alternating experiment at -20°C to 125°C passes 100%; the anti-drop ability of the same height is increased by more than 1 time; it improves the problem that the burr surface 3 of the punching hole 21 of the outer clutch ring 2 in the prior art causes the positioning column 11 of the inner clutch gear 1 to break, and eliminates the problem that the inner clutch gear 1 has a problem of column breakage in the circumferential direction, resulting in jamming failure and inability to drive normally during the dehydration drive of the washing machine.

[0075] Embodiment 3:

[0076] Please refer to Figures 2 to 11As shown in the figure, based on the clutch outer ring 2 of Embodiment 2, the present embodiment provides a clutch mechanism for a washing machine, including: the clutch outer ring 2 of Embodiment 2, and a clutch inner tooth part 1 fixedly connected to the inner hole of the clutch outer ring 2 by injection molding; wherein the clutch inner tooth part 1 includes an inner tooth part body and a positioning column 11 integrally formed with the inner tooth part body and adapted to be embedded in the punching hole 21. The clutch inner tooth part 1 is injection molded from the center of the clutch outer ring 2 to its inner circle direction.

[0077] When the thickness t of the side wall of the clutch outer ring 2 is 0.5 - 2 mm, and the aperture D of the punching hole 21 is ≤ 5 mm (the larger the aperture D of the punching hole 21 can be taken without affecting the magnetic force, the higher the strength between the clutch inner tooth part 1 and the clutch outer ring 2), when the precision requirement meets the GB / T1804 - 2000 m level and above, the groove depth H of the relief groove 51 can take a smaller value, so that a more precise clutch outer ring 2 part, its punching hole 21 and a longer - life concave module 5 can be obtained; generally, on the basis of meeting the strength, the smaller the value of the wall thickness t of the clutch outer ring 2 combined with the outer diameter, the better, and both the material cost and the production cost are low; for example, when t = 0.5, the aperture D of the punching hole 21 = 5 mm, and the groove depth H of the relief groove 51 = 0.1 mm.

[0078] When the number of punching holes 21 in the circumferential direction of the clutch outer ring 2 is more than 3, the assembly precision between the concave module 5 and the punching needle is poor, and H can take a larger value, so that punching holes 21 with relatively low processing precision and lower cost and a longer - life concave module 5 can be obtained, and the strength of the positioning column 11 on the clutch inner tooth part 1 can be higher. For example, when the number of punching holes 21 in the circumferential direction of the clutch outer ring 2 is 6, the gap between the concave module 5 and the punching needle is more than 0.1 mm. Considering the general processing precision and low processing difficulty and cost, H ≥ 0.3 mm; on the basis of meeting the magnetic force, when D ≥ 5 mm, preferably, the number of punching holes 21 in the circumferential direction of the clutch outer ring 2 is 2, which is convenient for processing, has low cost, and H ≥ 0.2 mm is sufficient.

[0079] At the same time, the inner diameter D of the through - hole 52 on the concave module 5 凹 is slightly larger than D. When the gap between the through - hole 52 on the concave module 5 and the punching hole 21 of the clutch outer ring 2 is large, and considering the wear of the mold during use, etc., H can take a larger value, so that the strength of the positioning column 11 on the clutch inner tooth part 1 can be higher; for example, when the inner diameter D of the through - hole 52 凹 - D ≥ 0.08 mm, H ≥ 0.25 mm.

[0080] At the same time, in order to facilitate feeding and discharging during punching the clutch outer ring 2 and improve production efficiency, the diameter R formed by the positioning seat 4 and the concave module 5 凹The dimensional fit clearance with the inner diameter of the clutch outer ring 2 is relatively larger. At this time, the H dimension is preferably slightly larger, so that the axial length of the convex platform 22 becomes larger, which can make the positioning post 11 on the clutch inner tooth part 1 stronger and extend the service life of the concave die block 5. If the clearance between the clutch outer ring 2 and the positioning seat 4 and the positioning ring 6 is not less than 0.10 mm, H≥0.2 mm.

[0081] It should be noted here that regarding the trumpet hole 23 punched on the clutch outer ring 2, while ensuring the concentricity of the clutch inner tooth part 1 and the clutch outer ring 2, it is also necessary to ensure that the stress caused by the shrinkage of the clutch inner tooth part 1 after injection molding is very small or there is no stress, and it should satisfy: (D1 - D) / 2H1 < 0.6, that is, when the D1 dimension takes a large value, the H1 dimension also takes a large value. When the shrinkage rate of the injection molding body material of the clutch inner tooth part 1 is large, H1 can take a maximum value, and the D1 value can take a smaller value, which can satisfy: (D1 - D) / 2H1 < 0.3. In this case, the concentricity accuracy of the clutch inner tooth part 1 and the clutch outer ring 2 will be slightly reduced, but the stress caused by the shrinkage of the clutch inner tooth part 1 after injection molding tends to 0 and the strength is higher. This structure can ensure the concentricity within a certain accuracy with the clutch outer ring 2 when the injection molding body material of the clutch inner tooth part 1 shrinks, and better prevent the potential hazard of the positioning post 11 integrally formed on the clutch inner tooth part 1 from being broken due to the shrinkage stress.

[0082] In this embodiment, through the trumpet hole 23, while ensuring the concentricity of the clutch inner tooth part 1 and the clutch outer ring 2, it also ensures that the stress caused by the shrinkage of the clutch inner tooth part 1 after injection molding is very small or there is no stress, so that the positioning post 11 of the clutch inner tooth part 1 suitable for being embedded in the punching hole 21 is not easily broken.

[0083] On the basis of the above structure, considering further improving the firmness and reliability of the connection structure formed by the clutch inner tooth part 1 and the clutch outer ring 2 during long-term use, chamfers C are respectively provided at the two axial end edges of the inner hole of the annular body of the clutch outer ring 2; then: 0.07R ≤ C ≤ 0.55t; where t is the thickness of the side wall of the annular body, and R is the radius of the inner hole of the annular body, and the angle of the chamfer C can be selected as 45°.

[0084] After the C chamfers at the two axial ends of the clutch inner tooth part 1 and the clutch outer ring 2 are combined, it has the effect of the clutch inner tooth part 1 tightly holding the clutch outer ring 2 along the axis direction, making the overall appearance of the clutch mechanism beautiful while increasing the axial pull-off force between the clutch inner tooth part 1 and the clutch outer ring 2. It is found through experiments that by designing the chamfer C here, the strength of the connection part formed between the clutch outer ring 2 and the clutch inner tooth part 1 is increased by 56.7% compared with the case without this structure; it passes 100% in the aging experiment at 125°C / 200 hours; it passes 100% in the 2-hour cold and hot alternating experiment at high and low temperatures of -20°C to 125°C; the anti-drop ability at the same height is also increased by more than 1 time.

[0085] In the above specific embodiments, the purpose, technical solution and beneficial effects of the present utility model have been further described in detail. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

[0086] In the description of the present utility model, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0087] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0088] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present utility model is usually placed, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0089] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0090] In the present utility model, unless otherwise clearly defined and limited, the first feature being above or below the second feature may include direct contact between the first and second features, or may include contact between the first and second features not being direct but through additional features therebetween. Moreover, the first feature being above, on top of, and over the second feature includes the first feature being directly above and diagonally above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, beneath, and under the second feature includes the first feature being directly below and diagonally below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

Claims

1. A side punching die, suitable for side punching processing of annular products, characterized in that: include: An inner hole positioning assembly, comprising a positioning seat suitable for being embedded in the inner hole of a circular ring-shaped product, a plurality of recessed grooves arranged on the outer side wall of the positioning seat at intervals along the circumferential direction, and a plurality of concave modules suitable for being detachably inserted into the plurality of recessed grooves one by one; a through hole extending along the radial direction of the circular ring-shaped product is formed on each concave module; and a clearance groove arranged along the axial direction of the circular ring-shaped product and communicating with the through hole is also provided on the side wall surface of each concave module facing the circular ring-shaped product; the two ends of the clearance groove extend to one of the axial side ends of the concave module; An outer wall positioning assembly, comprising a positioning ring suitable for wrapping around the outer side wall of the annular product, and punching pin holes provided on the positioning ring and suitable for one-to-one correspondence with the perforations of the plurality of concave modules; The punching needle comprises a needle body which is suitable for sequentially passing through the punching needle hole and the side wall of the annular product and then inserted into the punching hole. The needle body is suitable for forming a punching hole when passing through the side wall of the annular product.

2. The side punching die according to claim 1, characterized in that: The bottom wall of the recess is a flat surface; and The groove bottom wall surface of the relief groove is perpendicular to the central axis of the through hole.

3. The side punching die according to claim 2, characterized in that: The cross section of the relief groove along the radial surface of the annular product is rectangular.

4. The side punching die according to claim 3, characterized in that: Assume that the groove depth of the recess is H; H = 0.1 ~ 0.4mm.

5. The side punching die according to claim 4, characterized in that: Assume the length of the clearance groove is B; then D≤B≤D+0.

2.

6. The side punching die according to claim 1, characterized in that: The diameter of the punching hole is larger than the diameter of the punching hole; and The needle body comprises a large outer diameter needle for adapting to the punching needle hole and a small outer diameter needle for adapting to the perforation; the outer diameter of the large outer diameter needle is greater than the outer diameter of the small outer diameter needle, so that a conical transition section is formed between the large outer diameter needle and the small outer diameter needle.

7. The side punching die according to claim 1, characterized in that: The annular product is a full-circle integrated structure.

8. A clutch outer ring, characterized in that: include: An annular body and a plurality of punched holes punched on a side wall of the annular body along a circumferential direction; in Each punching hole is formed by using the side punching die as described in any one of claims 1 to 7; wherein A boss is formed on the edge of the punching hole facing the inner hole of the annular body; the boss protrudes along the axial direction of the punching hole toward the inner hole.

9. The clutch outer ring according to claim 8, characterized in that: The boss is waist-shaped along the axial direction of the annular body; and Assume that the outer diameter of the major axis of the boss is D2, then D2 = 1.1D 凹 ~1.3D 凹 ; where D 凹 is the inner diameter of the perforation.

10. The clutch outer ring according to claim 8 or 9, characterized in that The height of the boss relative to the edge of the punched hole is H2; then: H≤H2≤H+RR 凹 ;in H is the depth of the groove, R is the radius of the inner hole of the annular body, R 凹 is the radius of the locating seat.

11. The clutch outer ring according to claim 8 or 9, characterized in that: A trumpet hole with a gradually increasing inner diameter is formed on the side of the punching hole facing away from the inner hole of the annular body; Assume that the inner diameter of the end of the horn hole away from the inner hole of the annular body is D1, and the axial length of the horn hole is H1; then 0.2t≤H1≤0.5t, 1.1D≤D1≤1.3D; in D is the diameter of the punched hole; t is the thickness of the side wall of the annular body.

12. A clutch mechanism for a washing machine, characterized in that: include: The clutch outer ring as claimed in any one of claims 8 to 11, and the clutch inner toothed member adapted to be fixed to the inner hole of the clutch outer ring by injection molding; in The clutch internal gear member comprises an internal gear member body and a positioning column which is integrally formed with the internal gear member body and is suitable for being embedded in the punching hole.

13. The clutch mechanism of the washing machine according to claim 12, characterized in that: The two axial end edges of the inner hole of the annular body of the clutch outer ring are respectively provided with chamfers C; then: 0.07R≤C≤0.55t; wherein t is the thickness of the side wall of the annular body, and R is the radius of the inner hole of the annular body.

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