Split type reinforced inner gear ring structure

Abstract

The utility model provides a split type reinforced inner gear ring structure which is detachably clamped in a sleeve and comprises a ring body, inner teeth evenly and annularly arranged on the inner side of the ring body and clamping structures evenly and annularly arrayed on the upper portion of the ring body and used for being clamped with the sleeve. The clamping structure comprises a clamping part and a positioning part which is arranged on the back face of the clamping part and used for positioning the gear ring, and the sleeve comprises a sleeve body, a center through hole formed in the center of the sleeve body, a protruding block which is arranged on the bottom face of the sleeve body and is shaped like a Chinese character'tu 'and an object taking groove which is formed in the inner wall of the sleeve body and used for taking the inner gear ring. The adjacent protruding blocks form a clamping groove matched with the outer contour of the clamping structure, and the inner teeth do not penetrate through the positioning part. The split type reinforced inner gear ring structure is high in structural strength and good in using stability, the inner gear ring has good structural strength, and the connecting stability of the inner gear ring and the sleeve in the using process can be guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of powder metallurgy parts, in particular to a split-type reinforced inner gear ring structure. Background Art

[0002] Powder metallurgy is a process technology that produces metal powder or uses metal powder (or a mixture of metal powder and non-metal powder) as raw material, and then forms and sinters it to manufacture metal materials, composite materials and various types of products. The production of saw blade pressing plates through powder metallurgy technology has low cost, high production efficiency and is suitable for mass production.

[0003] The inner ring gear is a common mechanical component in planetary reduction mechanisms. Since the split inner ring gear has less machining allowance, higher machining accuracy and is easy to disassemble and maintain than the integral type, the inner ring gear mostly adopts a split structure. However, the split inner ring gear is prone to sliding and dislocation due to the matching clearance when used in conjunction with the sleeve, which leads to poor stability of the split ring gear when connected to an electric tool (such as an electric drill). In addition, when the inner ring gear is stamped in the prior art, the inner side of the locating block on the inner ring gear is generally directly opened by the inner teeth to facilitate the production of the inner ring gear. However, the inner wall of this type of inner ring gear is evenly distributed with internal teeth, which not only reduces the structural strength of the ring gear and causes tooth collapse, but also easily damages the locating block due to the concentrated torque at the position of the locating block. Utility Model Content

[0004] The utility model proposes a split reinforced internal gear ring structure. By providing a clamping structure that engages with the sleeve at the bottom of the internal gear ring, it can not only be quickly combined with the sleeve for use, but also be stably clamped with the sleeve through a positioning part, thereby avoiding shaking of the internal gear ring due to the fitting gap during the process. By designing the positioning part as an integrated structure that is not penetrated by the internal teeth, the structural strength of the gear ring can be greatly enhanced, effectively solving the problems in the prior art.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A split reinforced internal gear ring structure, which can be detachably snapped into the interior of a sleeve, comprises a ring body, internal teeth uniformly arranged on the inner side of the ring body, and a snap-fit ​​structure uniformly arranged in an annular array on the upper part of the ring body for snapping into each other with the sleeve, the snap-fit ​​structure comprising a snap-fitting portion and a positioning portion arranged on the back side of the snap-fitting portion for positioning the gear ring, the sleeve comprising a cylinder body, a central through hole opened in the center of the cylinder body, a "convex"-shaped protrusion arranged on the bottom surface of the cylinder body, and a taking groove opened on the inner wall of the cylinder body for taking the internal gear ring, adjacent protrusions form a slot that matches the outer contour of the snap-fit ​​structure, and the internal teeth do not penetrate the positioning portion.

[0007] Furthermore, the locking portion includes a connecting block fixedly arranged on the upper part of the inner gear ring and a locking block fixedly connected to the upper part of the connecting block for engaging with the locking groove, the locking block includes a horizontally arranged locking surface and an arc-shaped transition surface connecting the locking surface and the locking block, and the positioning portion is a reinforcing rib vertically fixedly connected to the middle part of the back side of the locking block.

[0008] Furthermore, the connecting block is fixedly connected to the tooth top of the inner teeth, the reinforcing rib is fixedly connected to the ring top of the ring body, the top surface of the reinforcing rib and the clamping surface are in the same horizontal plane, the connecting block spans the upper part of the four inner teeth and the two ends of the connecting block are located at the top surface of the tooth peak of the inner teeth.

[0009] Furthermore, the number of the engaging structures is eight groups, and the arc of the engaging portion is π / 8 arc.

[0010] Furthermore, the inner wall of the sleeve has a three-layer stepped structure, including a first step surface located in the same horizontal plane as the upper surface of the protrusion, a second step surface located in the same horizontal plane as the upper surface of the extraction groove, and a third step surface located in the same horizontal plane as the top surface of the sleeve.

[0011] Furthermore, the picking groove is crescent-shaped, the number of the picking grooves is two, and the two picking grooves are centrally symmetrical about the center of the inner gear ring.

[0012] Furthermore, the vertical height of the taking groove is greater than the height of the ring body.

[0013] The utility model has the following characteristics and beneficial effects:

[0014] The utility model relates to a split reinforced inner gear ring structure, which is provided with a snap-fit ​​structure that is snap-fitted with the sleeve at the bottom of the inner gear ring, which can not only be used in combination with the sleeve quickly, but also be stably snap-fitted with the sleeve through the positioning part. The positioning part is designed as a reinforcing rib structure fixedly connected to the rear of the snap-fit ​​part, which can not only avoid the shaking of the inner gear ring due to the matching clearance during the process, but also improve the overall strength of the snap-fit ​​part. By designing the positioning part as an integral pressure block that is not penetrated by the inner teeth, the structural strength of the gear ring is further enhanced. By designing the inner wall of the sleeve as a three-layer stepped structure, it is not only convenient to install the inner gear ring, but also the inner gear ring and the sleeve can be quickly separated through the extraction groove. The utility model has a split reinforced inner gear ring structure with high structural strength and good stability in use. It not only makes the inner gear ring have good structural strength, but also ensures the connection stability between the inner gear ring and the sleeve during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 This is a schematic diagram of the connection structure of a split reinforced internal gear ring structure of the utility model;

[0017] Figure 2 This is a diagram showing the combined state of an inner gear ring and a sleeve in a split reinforced inner gear ring structure of the utility model;

[0018] Figure 3 It is a structural schematic diagram of an inner gear ring in a split reinforced inner gear ring structure of the utility model;

[0019] Figure 4 For this utility model Figure 3 The enlarged view of point A in the middle;

[0020] Figure 5 It is a top view of an inner gear ring in a split reinforced inner gear ring structure of the utility model.

[0021] In the figure, 1-sleeve; 101-cylinder body; 102-center through hole; 103-bump; 104-removal groove; 105-slot; 106-first step surface; 107-second step surface; 108-third step surface; 2-ring body; 21-ring top; 3-inner teeth; 31-tooth top; 32-tooth peak; 4-engaging structure; 5-engaging part; 51-connecting block; 52-engaging block; 521-engaging surface; 522-transition surface; 6-positioning part. DETAILED DESCRIPTION

[0022] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] Reference Figure 1 and Figure 2As shown, a schematic diagram of the connection structure of a split reinforced internal gear ring structure, a combined state diagram of the internal gear ring and the sleeve, a split reinforced internal gear ring structure, which can be detachably snapped into the inside of the sleeve 1, including a ring body 2, inner teeth 3 evenly arranged on the inner side of the ring body 2, and a snap-fitting structure 4 evenly arranged in an annular array on the upper part of the ring body 2 for mutual snapping with the sleeve 1. The number of the snap-fitting structures 4 is eight groups. The snap-fitting structures 4 include a snap-fitting portion 5 and a positioning portion 6 arranged on the back side of the snap-fitting portion 5 for positioning the gear ring. By arranging a snap-fitting structure 4 that is mutually snapped with the sleeve 1 at the bottom of the inner gear 3, it can not only be quickly combined with the sleeve 1 for use, but also be stably snap-fitted with the sleeve 1 through the positioning portion 6.

[0024] The sleeve 1 includes a cylinder 101, a central through hole 102 opened in the center of the cylinder 101, a "convex" shaped convex block 103 arranged on the bottom surface of the cylinder 101, and a taking groove 104 opened on the inner wall of the cylinder 101 for taking the inner gear ring 3. The vertical height of the taking groove 104 is greater than the height of the ring body 2. This height difference structure allows the inner gear ring to not completely cover the taking groove 104 after installation, making it convenient to take the inner gear ring through the taking groove. The taking groove 104 is crescent-shaped. shape, the number of the picking grooves 104 is two and the two picking grooves 104 are centrally symmetrical about the center of the inner tooth circle 3. This symmetrical picking groove 104 structure can greatly facilitate the user to pick up the inner tooth circle 3 through the picking groove 104. The adjacent protrusions 103 form a clamping groove 105 that is adapted to the outer contour of the clamping structure 4. The inner tooth 3 does not penetrate the positioning portion 6. The positioning portion 6 is designed to be in the form of an integral pressing block that is not penetrated by the inner tooth 3, which can greatly enhance the structural strength of the gear ring.

[0025] The inner wall of the sleeve 1 has a three-layer stepped structure, including a first step surface 106 located in the same horizontal plane as the upper surface of the protrusion 103, a second step surface 107 located in the same horizontal plane as the upper surface of the picking groove 104, and a third step surface 108 located in the same horizontal plane as the top surface of the sleeve 1. By designing the inner wall of the sleeve 1 as a three-layer stepped structure, not only can the installation of the three rings of internal teeth be facilitated, but the three rings of internal teeth and the sleeve 1 can also be quickly separated through the picking groove 104.

[0026] Reference Figure 3 , Figure 4 and Figure 5As shown, a structural schematic diagram of an inner gear ring in a split reinforced inner gear ring structure, an enlarged view at point A and a top view of the inner gear ring, the clamping portion 5 includes a connecting block 51 fixedly arranged on the upper part of the inner gear ring 3 and a clamping block 52 fixedly connected to the upper part of the connecting block 51 for cooperating with the clamping slot 105, the arc of the clamping portion 5 is π / 8 arc, the clamping block 52 includes a horizontally arranged clamping surface 521 and an arc-shaped transition surface 522 connecting the clamping surface 521 and the clamping block 52, the form of the clamping surface 521 and the transition surface 522 can make the clamping portion 5 fit better with the clamping slot 105, the positioning portion 6 is a reinforcing rib vertically fixedly connected to the middle part of the back side of the clamping block 52, and the positioning portion 6 is designed as a reinforcing rib structure fixedly connected to the rear part of the clamping portion 5, which can not only avoid the shaking of the inner gear ring 3 due to the fitting clearance during the process, but also improve the overall strength of the clamping portion 5.

[0027] The connecting block 51 is fixedly connected to the tooth top 31 of the inner teeth 3, the reinforcing rib is fixedly connected to the ring top 21 of the ring body 2, the top surface of the reinforcing rib is in the same horizontal plane as the clamping surface 521, the connecting block 51 spans the upper part of the four inner teeth 3 and the two ends of the connecting block 51 are located at the top surface of the tooth peak 32 of the inner teeth 3. This connection structure can greatly enhance the overall structural strength of the four inner teeth 3 interconnected with the connecting block 51 without affecting the inner teeth 3 of the inner teeth 3.

[0028] A split reinforced internal gear three-ring structure has high structural strength and good use stability, which not only makes the internal gear three rings have good structural strength, but also ensures the connection stability between the internal gear three rings and the sleeve 1 during use.

[0029] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A split reinforced internal gear ring structure, which can be detachably connected to the inside of the sleeve, characterized in that: It includes a ring body, internal teeth uniformly arranged inside the ring body, and a clamping structure uniformly arrayed on the upper part of the ring body for mutual clamping with a sleeve, the clamping structure includes a clamping part and a positioning part arranged on the back of the clamping part for positioning the gear ring, the sleeve includes a cylinder body, a central through hole opened in the center of the cylinder body, a "convex" shaped convex block arranged on the bottom surface of the cylinder body, and a taking groove opened on the inner wall of the cylinder body for taking the internal gear ring, adjacent convex blocks form a clamping groove adapted to the outer contour of the clamping structure, and the internal teeth do not penetrate the positioning part.

2. The split reinforced internal gear ring structure according to claim 1, characterized in that: The engaging portion includes a connecting block fixedly arranged on the upper part of the inner gear ring and a clamping block fixedly connected to the upper part of the connecting block for engaging with the clamping groove. The clamping block includes a horizontally arranged clamping surface and an arc-shaped transition surface connecting the clamping surface and the clamping block. The positioning portion is a reinforcing rib vertically fixedly connected to the middle part of the back side of the clamping block.

3. The split reinforced internal gear ring structure according to claim 2, characterized in that: The connecting block is fixedly connected to the tooth top of the inner teeth, the reinforcing rib is fixedly connected to the circle top of the ring body, the top surface of the reinforcing rib is in the same horizontal plane as the clamping surface, the connecting block spans the upper part of the four inner teeth and the two ends of the connecting block are located at the top surface of the tooth peak of the inner teeth.

4. A split reinforced internal gear ring structure according to claim 1, 2 or 3, characterized in that: The number of the clamping structures is eight, and the arc of the clamping portion is π / 8 arc.

5. A split reinforced internal gear ring structure according to claim 1, 2 or 3, characterized in that: The inner wall of the sleeve has a three-layer stepped structure, including a first step surface located in the same horizontal plane as the upper surface of the protrusion, a second step surface located in the same horizontal plane as the upper surface of the extraction groove, and a third step surface located in the same horizontal plane as the top surface of the sleeve.

6. A split reinforced internal gear ring structure according to claim 1, 2 or 3, characterized in that: The picking groove is crescent-shaped, there are two picking grooves, and the two picking grooves are centrally symmetrical about the center of the inner gear ring.

7. A split reinforced internal gear ring structure according to claim 1, 2 or 3, characterized in that: The vertical height of the taking groove is greater than the height of the ring body.

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