Joint bearing dust-proof oil seal mold

Abstract

The utility model provides a joint bearing dustproof oil seal mould relates to mould design, include: outer mould, it includes upper outer mould, middle outer mould and lower outer mould, and upper outer mould is equipped with upper mould cavity, and upper mould cavity includes upper positioning groove, upper inverted mould groove, and the bottom of upper outer mould is equipped with upper boss, middle outer mould is equipped with middle mould cavity, and middle mould cavity includes middle embedding groove, middle inverted mould groove, and the bottom of middle outer mould is equipped with middle boss, lower outer mould is equipped with lower mould cavity, and lower mould cavity includes lower embedding groove, lower inverted mould groove and lower positioning groove, and upper boss is embedded in middle embedding groove, and middle boss is embedded in lower embedding groove, and the inner core includes upper positioning shaft, mandrel and lower positioning shaft, and the inner core is placed in the outer mould, and upper positioning shaft is embedded in upper positioning groove, and lower positioning shaft is embedded in lower positioning groove, so that the forming space of oil seal is formed between outer mould and mandrel. The utility model has the beneficial effects: the forming space precision of oil seal improves, avoids the flash or glue defect of oil seal after forming, reduces the oil leakage risk of equipment, prolongs the actual service life of oil seal.

Description

Technical Field

[0001] This utility model relates to the field of mold design technology, and in particular to a dustproof oil seal mold for spherical bearings. Background Technology

[0002] Rubber oil seals are core sealing elements for rotating or reciprocating motion components in the field of construction machinery. Their core function is to prevent lubricating oil leakage and isolate external dust and impurities from intrusion. Typical applications include critical components such as spherical bearings. However, due to the harsh working conditions of construction machinery, rubber oil seals are prone to wear and failure during service, leading to oil leakage and directly interfering with normal equipment operation. Therefore, frequent replacement is necessary, making the quality control of rubber oil seal manufacturing particularly critical.

[0003] Currently, the mainstream molding process for rubber oil seals uses a combination of upper and lower molds. However, this type of mold generally suffers from insufficient alignment accuracy during mold closing, which easily leads to defects such as flash or insufficient adhesive in the molded oil seal. Flash can scratch the mating parts of the oil seal during equipment operation, compromising the integrity of the sealing pair; insufficient adhesive directly results in an incomplete sealing surface structure, weakening the sealing performance. The combination of these two defects significantly increases the risk of oil leakage and further shortens the actual service life of the oil seal. Utility Model Content

[0004] In view of this, in order to solve the above-mentioned problems in the current processing of rubber oil seal molds, the present invention provides a dustproof oil seal mold for spherical bearings.

[0005] An embodiment of this utility model provides a dustproof oil seal mold for spherical bearings, comprising: An outer mold includes an upper outer mold, a middle outer mold, and a lower outer mold. The upper outer mold has a through-hole upper mold cavity, which includes an upper positioning groove and an upper mold groove connected to the bottom of the upper positioning groove. The bottom of the upper outer mold has an upper boss. The middle outer mold has a through-hole middle mold cavity, which includes a middle insert groove and a middle mold groove connected to the bottom of the middle insert groove. The bottom of the middle outer mold has a middle boss. The lower outer mold has a through-hole lower mold cavity, which includes a lower insert groove, a lower mold groove, and a lower positioning groove connected sequentially from top to bottom. The upper boss is embedded in the middle insert groove, and the middle boss is embedded in the lower insert groove, so that the upper outer mold, the middle outer mold, and the lower outer mold are connected sequentially. The inner core includes an upper positioning shaft, a mandrel, and a lower positioning shaft connected sequentially from top to bottom. The inner core is placed inside the outer mold. The upper positioning shaft is embedded in the upper positioning groove, and the lower positioning shaft is embedded in the lower positioning groove, so that an oil-sealed molding space is formed between the outer mold and the mandrel.

[0006] Furthermore, the upper mold groove includes an upper first upper mold groove and a lower second upper mold groove. The first upper mold groove is cylindrical, and the second upper mold groove is a frustum shape with a diameter that gradually increases from top to bottom.

[0007] Furthermore, both the upper boss and the middle groove are cylindrical, so that the upper boss can be tightly embedded in the middle groove, and both the middle boss and the lower groove are cylindrical, so that the middle boss can be tightly embedded in the lower groove.

[0008] Furthermore, the height of the upper boss is greater than the depth of the middle groove, so that a first mold-opening groove is formed between the upper outer mold and the middle outer mold, and the height of the middle boss is greater than the depth of the lower groove, so that a second mold-opening groove is formed between the middle outer mold and the lower outer mold.

[0009] Furthermore, both the upper positioning groove and the lower positioning groove are cylindrical, the upper positioning groove has the same diameter as the upper positioning shaft, and the lower positioning groove has the same diameter as the lower positioning shaft.

[0010] Furthermore, steps are formed at the connection points of the upper positioning shaft and the lower positioning shaft with the two ends of the mandrel, and the upper positioning shaft and the lower positioning shaft abut against the upper mold cavity and the lower mold cavity through the two steps.

[0011] Furthermore, the middle mold groove includes an upper first middle mold groove and a lower second middle mold groove. The first middle mold groove is a frustum shape with a diameter that gradually decreases from top to bottom, and the second middle mold groove is cylindrical.

[0012] Furthermore, the lower mold groove is a cylinder with a diameter smaller than that of the lower insert groove.

[0013] Furthermore, the bottom surface of the central boss is provided with a first overflow groove, and the bottom surface of the lower recess is provided with a second overflow groove. The central boss is embedded into the lower recess so that the first overflow groove and the second overflow groove are closed.

[0014] Furthermore, the upper mold cavity, the middle mold cavity, and the lower mold cavity are all coaxially arranged with the inner core.

[0015] The beneficial effects of the technical solution provided by the embodiments of this utility model are as follows: The dustproof oil seal mold for spherical bearings of this utility model is divided into an outer mold and an inner core. The outer mold is set as an upper outer mold, a middle outer mold and a lower outer mold. The upper outer mold and the lower outer mold are respectively fitted with the upper positioning shaft and the lower positioning shaft at both ends of the inner core through the upper positioning groove and the lower positioning groove to achieve accurate positioning. The upper outer mold, the middle outer mold and the lower outer mold are connected in sequence by fitting, so that the oil seal lip is subjected to uniform force, the forming space accuracy of the oil seal is improved, the defects of flash or missing glue in the formed oil seal are avoided, the risk of oil leakage of equipment is reduced and the actual service life of the oil seal is extended. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a dustproof oil seal; Figure 2 This is a schematic diagram of a dustproof oil seal mold for a spherical bearing according to the present invention; Figure 3 This is an exploded view of a dustproof oil seal mold for a joint bearing according to this utility model.

[0017] In the diagram: 100, Dustproof oil seal; 1, Outer mold; 11, Upper outer mold; 111, Upper positioning groove; 112, First upper mold groove; 113, Second upper mold groove; 114, Upper boss; 12, Middle outer mold; 121, Middle insert groove; 122, First middle mold groove; 123, Second middle mold groove; 124, Middle boss; 125, First overflow groove; 13, Lower outer mold; 131, Lower insert groove; 132, Lower mold groove; 133, Lower positioning groove; 134, Second overflow groove; 14, First mold opening groove; 15, Second mold opening groove; 2, Inner core; 21, Upper positioning shaft; 22, Mandrel; 23, Lower positioning shaft. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings. The following description presents a preferred embodiment of several possible embodiments of this utility model, intended to provide a basic understanding of the utility model, but not intended to identify the key or decisive elements of the utility model or to limit the scope of protection sought.

[0019] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0020] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures. Also, it should be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale.

[0022] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please refer to Figure 2 and 3 This utility model provides a dustproof oil seal mold for spherical bearings, used to manufacture such... Figure 1 The dustproof oil seal 100 shown mainly includes an outer mold 1 and an inner core 2.

[0024] The outer mold 1 mainly includes an upper outer mold 11, a middle outer mold 12, and a lower outer mold 13, which are arranged sequentially from top to bottom. The external shapes of the upper outer mold 11, the middle outer mold 12, and the lower outer mold 13 can be flexibly set according to the actual application scenario. For example, in this embodiment, the shapes of the upper outer mold 11, the middle outer mold 12, and the lower outer mold 13 are approximately cylindrical.

[0025] The upper outer mold 11 has a through-hole upper mold cavity, which includes an upper positioning groove 111 and an upper mold groove connected to the bottom of the upper positioning groove 111. The bottom of the upper outer mold 11 has an upper boss 114. Specifically, the upper mold groove includes an upper first upper mold groove 112 and a lower second upper mold groove 113. The first upper mold groove 112 is cylindrical, and the second upper mold groove 113 is a frustum shape with a diameter that gradually increases from top to bottom.

[0026] The outer mold 12 has a through-hole cavity, which includes a central groove 121 and a central mold groove connected to the bottom of the central groove 121. The bottom of the outer mold 12 has a central boss 124. Specifically, the central mold groove includes an upper first central mold groove 122 and a lower second central mold groove 123. The first central mold groove 122 is a frustum-shaped cylinder with a diameter that gradually decreases from top to bottom, and the second central mold groove 123 is cylindrical.

[0027] The lower outer mold 13 is provided with a through-hole lower mold cavity, which includes a lower insert groove 131, a lower mold groove 132, and a lower positioning groove 133 connected sequentially from top to bottom. Specifically, the lower mold groove 132 is a cylinder with a diameter smaller than that of the lower insert groove 131.

[0028] The upper boss 114 is embedded in the middle groove 121, and the middle boss 124 is embedded in the lower groove 131, so that the upper outer mold 11, the middle outer mold 12, and the lower outer mold 13 are connected in sequence. Specifically, both the upper positioning groove 111 and the lower positioning groove 133 are cylindrical.

[0029] In some embodiments, the upper boss 114 and the middle groove 121 are both cylindrical, so that the upper boss 114 can be tightly embedded in the middle groove 121, and the middle boss 124 and the lower groove 131 are both cylindrical, so that the middle boss 124 can be tightly embedded in the lower groove 131.

[0030] The inner core 2 is disposed in the middle of the outer mold 1. The inner core 2 includes an upper positioning shaft 21, a mandrel 22, and a lower positioning shaft 23 connected sequentially from top to bottom. The upper positioning groove 111 has the same diameter as the upper positioning shaft 21, and the lower positioning groove 133 has the same diameter as the lower positioning shaft 23. The upper positioning shaft 21 and the upper positioning groove 111 are clearance-fitted, and the lower positioning shaft 23 and the lower positioning groove 133 are clearance-fitted. The shape of the surface of the mandrel 22 is approximately the same as the shape of the inner wall of the outer mold 1, that is, the same as the shape of the inner wall of the dustproof oil seal 100 to be processed. The inner core 2 is placed inside the outer mold 1, the upper positioning shaft 21 is embedded in the upper positioning groove 111, and the lower positioning shaft 23 is embedded in the lower positioning groove 133, so that a forming space for the oil seal is formed between the outer mold 1 and the mandrel 22.

[0031] Furthermore, in order to ensure accurate center positioning, the upper mold cavity, the middle mold cavity, and the lower mold cavity in this embodiment are all coaxially arranged with the inner core 2.

[0032] In some embodiments, steps are formed at the connection points of the upper positioning shaft 21 and the lower positioning shaft 23 with the two ends of the mandrel 22, and the upper positioning shaft 21 and the lower positioning shaft 23 abut against the upper mold cavity and the lower mold cavity through the two steps, thereby achieving more accurate positioning of the mandrel 22.

[0033] To facilitate mold opening, the height of the upper boss 114 is greater than the depth of the middle groove 121, forming a first mold opening groove 14 between the upper outer mold 11 and the middle outer mold 12. The height of the middle boss 124 is greater than the depth of the lower groove 131, forming a second mold opening groove 15 between the middle outer mold 12 and the lower outer mold 13. The upper outer mold 11 and the middle outer mold 12 can be easily opened via the first mold opening groove 14, and the middle outer mold 12 and the lower outer mold 13 can be easily opened via the second mold opening groove 15.

[0034] In addition, to allow the sealant to melt and fill the molding space, and to allow excess sealant to overflow, the bottom surface of the central boss 124 is provided with a first overflow groove 125, and the bottom surface of the lower recess 131 is provided with a second overflow groove 134. The central boss 124 is embedded in the lower recess 131, so that the first overflow groove 125 and the second overflow groove 134 close together to form an overflow cavity. The overflow cavity is used to store a larger amount of sealant, thereby ensuring the quality of mold forming. Similarly, a similar overflow groove can be provided between the upper boss 114 and the central recess 121.

[0035] The process of making a dustproof oil seal 100 using a joint bearing dustproof oil seal mold of this utility model is as follows: First, assemble the mold and fill the molding space with colloid (broken colloid strips). Specifically, first assemble the inner core 2 and the upper outer mold 11, and fill the space between the upper outer mold 11 and the inner core 2 with colloid. Then assemble the middle outer mold 12 and fill the space between the middle outer mold 12 and the inner core 2 with colloid. Place colloid on the edge of the lower mold 131 of the lower outer mold 13. Then assemble the lower outer mold 13 and press the broken colloid strips together. In this way, the molding space between the outer mold 1 and the inner core 2 is filled with colloid. Then, clamp the assembled outer mold 1 and inner core 2 with a special clamp (U-shaped clamp) and place them in a furnace to be heated to the required temperature to melt the colloid. The melted colloid fills the molding space, and the excess colloid flows to the first overflow groove 125 and the second overflow groove 134. After the colloid solidifies, disassemble the outer mold 1 and the inner core 2 to obtain the required dustproof oil seal 100.

[0036] In this document, the directional terms such as front, back, top, and bottom are defined based on the position of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that these are relative concepts and can vary depending on different methods of use and placement; the use of these directional terms should not limit the scope of protection claimed in this application.

[0037] Where there is no conflict, the embodiments and features described above can be combined with each other. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dustproof oil seal mold for spherical bearings, characterized in that, include: An outer mold includes an upper outer mold, a middle outer mold, and a lower outer mold. The upper outer mold has a through-hole upper mold cavity, which includes an upper positioning groove and an upper mold groove connected to the bottom of the upper positioning groove. The bottom of the upper outer mold has an upper boss. The middle outer mold has a through-hole middle mold cavity, which includes a middle insert groove and a middle mold groove connected to the bottom of the middle insert groove. The bottom of the middle outer mold has a middle boss. The lower outer mold has a through-hole lower mold cavity, which includes a lower insert groove, a lower mold groove, and a lower positioning groove connected sequentially from top to bottom. The upper boss is embedded in the middle insert groove, and the middle boss is embedded in the lower insert groove, so that the upper outer mold, the middle outer mold, and the lower outer mold are connected sequentially. The inner core includes an upper positioning shaft, a mandrel, and a lower positioning shaft connected sequentially from top to bottom. The inner core is placed inside the outer mold. The upper positioning shaft is embedded in the upper positioning groove, and the lower positioning shaft is embedded in the lower positioning groove, so that an oil-sealed molding space is formed between the outer mold and the mandrel.

2. The dustproof oil seal mold for a spherical bearing as described in claim 1, characterized in that: The upper mold groove includes a first upper mold groove at the top and a second upper mold groove at the bottom. The first upper mold groove is cylindrical, and the second upper mold groove is a frustum-shaped cylinder with a diameter that gradually increases from top to bottom.

3. The dustproof oil seal mold for a spherical bearing as described in claim 1, characterized in that: Both the upper boss and the middle groove are cylindrical, so that the upper boss can be tightly embedded in the middle groove. Both the middle boss and the lower groove are cylindrical, so that the middle boss can be tightly embedded in the lower groove.

4. The dustproof oil seal mold for a spherical bearing as described in claim 3, characterized in that: The height of the upper boss is greater than the depth of the middle groove, so that a first mold opening groove is formed between the upper outer mold and the middle outer mold. The height of the middle boss is greater than the depth of the lower groove, so that a second mold opening groove is formed between the middle outer mold and the lower outer mold.

5. The dustproof oil seal mold for a spherical bearing as described in claim 1, characterized in that: Both the upper positioning groove and the lower positioning groove are cylindrical. The upper positioning groove has the same diameter as the upper positioning shaft, and the lower positioning groove has the same diameter as the lower positioning shaft.

6. The dustproof oil seal mold for a spherical bearing as described in claim 1, characterized in that: The upper positioning shaft and the lower positioning shaft form steps at the connection points with the two ends of the mandrel, and the upper positioning shaft and the lower positioning shaft abut against the upper mold cavity and the lower mold cavity through the two steps.

7. The dustproof oil seal mold for a spherical bearing as described in claim 1, characterized in that: The middle mold groove includes an upper first middle mold groove and a lower second middle mold groove. The first middle mold groove is a frustum-shaped groove with a diameter that gradually decreases from top to bottom, and the second middle mold groove is a cylinder.

8. The dustproof oil seal mold for a spherical bearing as described in claim 1, characterized in that: The lower mold groove is a cylinder with a diameter smaller than that of the lower insert groove.

9. The dustproof oil seal mold for a spherical bearing as described in claim 1, characterized in that: The bottom surface of the central boss is provided with a first overflow groove, and the bottom surface of the lower recess is provided with a second overflow groove. The central boss is embedded in the lower recess so that the first overflow groove and the second overflow groove are closed.

10. A dustproof oil seal mold for a spherical bearing as described in claim 1, characterized in that: The upper mold cavity, the middle mold cavity, and the lower mold cavity are all coaxially arranged with the inner core.

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