Clamp spring installation tool for powder metallurgy gear shaft

Abstract

The utility model discloses a clamp spring installation tool for a powder metallurgy gear shaft, and belongs to the field of powder metallurgy equipment. The device comprises a shaft mounting seat and a snap spring pressure mechanism, a shaft placing hole for placing a shaft is formed in the shaft mounting seat, the part, matched with a gear, of the upper end of the shaft extends out of the shaft placing hole, and an annular snap spring groove is formed in the upper end of the shaft; the snap spring pressure mechanism comprises a pressure head and a round rod; the pressing head is connected with a lifting part of the press machine, and a through hole is formed in the position, corresponding to the shaft placing hole, of the pressing head; the lower end of the round rod penetrates through the through hole, the round rod is limited and cannot fall down from the through hole, and the diameter of the through hole is smaller than the outer diameter of a circular ring of the clamping spring. Semi-automatic installation of the clamp spring can be achieved through a traditional press machine, production efficiency is greatly improved, and labor intensity is relieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to powder metallurgy equipment field, more specifically, relate to a kind of clamping spring installation tool of powder metallurgy gear shaft. BACKGROUND

[0002] Powder metallurgy technology is widely used in aerospace, shipbuilding, automobile industry, household appliances, garden machinery, 3D printing and other fields since its easy forming, low cost, little or no cutting and other advantages. With the maturation of powder metallurgy forming press, die material and raw material (powder), it promotes the development of powder metallurgy technology. In recent years, a large number of castings or pure machining parts have been replaced by powder metallurgy technology. However, powder metallurgy products are not dense (usually density 6.8-7.0g / cm 3 ), and the strength and toughness of some special powder metallurgy structural parts are not as good as those of the same type of steel parts. For example, some long-diameter gear shaft parts are not suitable for this method of production, but if the whole gear shaft is changed into a gear and steel shaft assembly, it can fully meet the functional and strength performance requirements.

[0003] In order to prevent the gear from moving off the shaft, a clamping spring slot is added to the shaft in the prior art to install a clamping spring to limit the gear from falling off. At present, in the actual processing and production process, the cooperation and connection of the clamping spring and the clamping spring slot on the gear shaft are basically completed by the workers using a clamping spring pliers. The worker inserts the pointed mouth of the clamping spring pliers into the holes at both ends of the clamping spring, expands the clamping spring outward, and inserts it into the clamping spring slot on the gear shaft. After the clamping spring is inserted into the clamping spring slot, the clamping spring pliers are pulled out of the hole, and the clamping spring is tightened inward under the action of the restoring force, so as to be tightly fitted in the clamping spring slot. This operation of installing the clamping spring through the clamping spring pliers is troublesome, which leads to low production efficiency.

[0004] A kind of drive half shaft clamping spring slot and hold tight clamping spring are disclosed in the patent literature with patent application number CN202021149375.1 and publication date January 29, 2021. The moving joint assembly includes a moving joint, a handle part spline shaft installed on one side of the moving joint, and a clamping spring slot opened on the handle part spline shaft. The clamping spring slot is connected with the hold tight clamping spring. The side of the clamping spring slot away from the moving joint is provided with a slope for easy insertion and removal of the hold tight clamping spring. The original 0-degree vertical surface is machined into a 10°±1° slope surface. The existence of the slope makes it easier to pull out the drive half shaft assembly from the cooperation with the main reducer half shaft gear during maintenance and replacement. This scheme improves the structure of the clamping spring slot, making the clamping spring easier to insert and remove. However, the clamping spring is still difficult to be clamped into the clamping spring slot during actual installation, and manual expansion of the clamping spring is often required, which is time-consuming and labor-intensive. SUMMARY

[0005] 1. Problem to be solved

[0006] In view of the existing gear shaft clamping groove, when installing, it needs to manually expand the clamping spring for installation, which is time-consuming and laborious, the utility model provides a powder metallurgy gear shaft's clamping spring installation tool, through the traditional press, the semi-automatic installation of the clamping spring can be realized, the production efficiency is greatly improved, and the labor intensity is reduced.

[0007] 2、Technical scheme

[0008] To solve the above problems, the utility model adopts the following technical scheme.

[0009] A kind of powder metallurgy gear shaft's clamping spring installation tool, including shaft mounting seat and clamping spring pressure mechanism, the shaft mounting seat is set with the shaft placement hole of placing shaft, the upper end of the shaft and the part of gear cooperation protrude shaft placement hole, the upper end of the shaft is provided with annular clamping spring groove;The clamping spring pressure mechanism includes pressure head and round bar;The pressure head connects the lifting component of press, and it is set with through hole corresponding to the position of shaft placement hole;The lower end of the round bar passes through the through hole and the round bar is restricted and cannot fall from the through hole, and the diameter of the through hole is less than the outer diameter of the ring of clamping spring.

[0010] As the further improvement of claim, the lower end of the round bar is the necking structure.

[0011] As the further improvement of claim, the lifting component of press is guided by rack and pinion mechanism.

[0012] As the further improvement of claim, the upper end of the lifting component of press is connected to the top of press by return spring.

[0013] As the further improvement of claim, the lower end of the shaft is provided with clamping block, and the corresponding position of the shaft placement hole is set with clamping groove matched with the clamping block.

[0014] As the further improvement of claim, one part of the position of the upper end of the shaft contacted with gear is plane, and the gear is set with installation groove matched with the plane.

[0015] As the further improvement of claim, the upper end of the round bar is connected to press by spring.

[0016] As the further improvement of claim, the outer side of the upper part of the round bar is provided with annular baffle with diameter greater than the diameter of the through hole.

[0017] As the further improvement of claim, the round bar is ladder structure, and the through hole is corresponding ladder hole.

[0018] 3、Beneficial effects

[0019] Compared with the prior art, the powder metallurgy gear shaft's circlip installation tool has the beneficial effects that

[0020] (1) The utility model relates to a circlip installation tool of a powder metallurgy gear shaft, when working, first, the circlip is sleeved on the lower end of the round rod, when the pressure machine control pressure head is pressed down, the round rod is contacted with the top end of the shaft and is lifted up, the shaft is also entered into the through hole of the pressure head, and because the outer diameter of the circlip ring is greater than the inner diameter of the through hole, the circlip is pressed into the circlip groove on the top end of the shaft by the pressure machine, the installation of the circlip is realized, through the mode, the quick semi-automatic installation of the circlip can be realized, the production efficiency is greatly improved, and the labor intensity is reduced.

[0021] (2) The utility model relates to a circlip installation tool of a powder metallurgy gear shaft, the lower end of the round rod is provided as a necked structure, so that the circlip can be conveniently sleeved on the round rod along the inclined surface, and the circlip is also conveniently pressed to the circlip groove from the round rod.

[0022] (3) The utility model relates to a circlip installation tool of a powder metallurgy gear shaft, the lower end of the shaft is provided with a clamping block, the corresponding position of the shaft placing hole is provided with a clamping groove matched with the clamping block, the circumferential movement of the shaft in the shaft mounting seat is limited, the working stability of the tool is ensured, and the upper end of the shaft is provided as a plane at the position contacted with the gear, the mounting groove matched with the plane is provided in the gear, so that the circumferential movement of the gear on the shaft is limited, and the working stability of the tool is further ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the structure schematic view of the utility model circlip installation tool;

[0024] Figure 2 It is the structure schematic view of the utility model round rod and shaft;

[0025] Figure 3 It is the structure schematic view of the utility model pressure head and round rod;

[0026] Figure 4 It is the structure schematic view of the utility model pressure machine;

[0027] In the drawing: 1, shaft mounting seat;2, shaft;3, circlip groove;4, pressure head;5, round rod;6, circlip;7, gear rack mechanism;8, return spring;9, clamping block;10, gear;11, plane. DETAILED DESCRIPTION

[0028] Exemplary embodiments of the present invention are described in detail below. While these exemplary embodiments have been described in sufficient detail to enable those skilled in the art to practice the present invention, it should be understood that other embodiments may be implemented and various changes may be made to the present invention without departing from its spirit and scope. The more detailed description of embodiments of the present invention below is not intended to limit the scope of the claimed invention, but is merely illustrative and does not limit the description of the features and characteristics of the invention, in order to provide the best mode for carrying out the invention and sufficient to enable those skilled in the art to practice it. Therefore, the scope of the present invention is defined only by the appended claims.

[0029] Example 1

[0030] A snap ring mounting fixture for powder metallurgy gear shafts is used during the assembly process of gear shafts to install the snap ring into the snap ring groove of the shaft, preventing the gear from detaching from the shaft. Its specific structure and technical effects are described in detail below.

[0031] like Figures 1 to 3 As shown, the tooling includes a shaft mounting base 1 and a snap ring pressure mechanism. The shaft mounting base 1 has a shaft placement hole for placing a shaft 2. The upper end of the shaft 2, which mates with the gear, extends out of the shaft placement hole. The upper end of the shaft 2 is provided with an annular snap ring groove 3.

[0032] The retaining ring pressure mechanism includes a pressure head 4 and a round rod 5. The pressure head 4 is connected to the lifting component of the press, and has a through hole corresponding to the position of the shaft placement hole. The lower end of the round rod 5 passes through the through hole, and the round rod 5 is restricted from falling through the through hole. The diameter of the through hole is smaller than the outer diameter of the ring of the retaining ring 6. Specifically, any one of the following three methods can be used to restrict the fall of the round rod 5: ① The upper end of the round rod 5 is connected to the press via a spring; ② An annular baffle with a diameter larger than the diameter of the through hole is set on the upper outer side of the round rod 5; ③ The round rod 5 is set as a stepped structure, and the through hole is a corresponding stepped hole, so that the round rod is blocked from falling through the stepped structure. This embodiment uses the third method.

[0033] During operation, the retaining ring 6 is first fitted onto the lower end of the round rod 5. When the press head 4 is pressed down, the round rod 5 contacts the top of the shaft 2 and is lifted up, and the shaft 2 enters the through hole of the press head 4. Since the outer diameter of the retaining ring 6 is larger than the inner diameter of the through hole, the retaining ring 6 is pressed down by the press and snapped into the retaining ring groove 3 at the upper end of the shaft, thus achieving the installation of the retaining ring 6. In this way, the retaining ring 6 can be installed quickly and semi-automatically, greatly improving production efficiency and reducing labor intensity. In this embodiment, the lower end of the round rod 5 has a constricted structure, which allows the retaining ring 6 to be easily fitted onto the round rod 5 along the inclined surface, and at the same time, it also facilitates the smooth pressing of the retaining ring 6 from the round rod 5 into the retaining ring groove 3.

[0034] Furthermore, the lower end of the shaft 2 is provided with a clamping block 9, and the corresponding position of the shaft placement hole is provided with a clamping groove matched with the clamping block 9, which can limit the circumferential movement of the shaft 2 in the shaft mounting seat 1, and ensure the working stability of the tool. At the same time, one part of the position where the upper end of the shaft 2 contacts with the gear 10 is a plane 11, and the gear 10 is correspondingly provided with a mounting groove matched with the plane 11, which can limit the circumferential movement of the gear 10 on the shaft 2, and further ensure the working stability of the tool.

[0035] As shown in Figure 4 The press machine can be a common press machine on the market, the lifting part is guided by the gear and rack mechanism 7, and the upper end of the lifting part of the press machine is connected to the top of the press machine through the return spring 8.

[0036] In summary, the clamping spring installation tool for the powder metallurgy gear shaft of the embodiment can realize the semi-automatic installation of the clamping spring through the traditional press machine, greatly improve the production efficiency, and reduce the labor intensity.

Claims

1. A snap ring mounting fixture for a powder metallurgy gear shaft, comprising a shaft mounting base (1), wherein the shaft mounting base (1) has a shaft placement hole for placing a shaft (2), the upper end of the shaft (2) extending out of the shaft placement hole to engage with the gear, and the upper end of the shaft (2) is provided with an annular snap ring groove (3), characterized in that: It also includes a snap ring pressure mechanism; the snap ring pressure mechanism includes a pressure head (4) and a round rod (5); the pressure head (4) is connected to the lifting component of the press, and a through hole is opened at the position corresponding to the shaft placement hole; the lower end of the round rod (5) passes through the through hole and the round rod (5) is restricted from falling out of the through hole, and the diameter of the through hole is smaller than the outer diameter of the ring of the snap ring (6).

2. The snap ring mounting fixture for a powder metallurgy gear shaft according to claim 1, characterized in that: The lower end of the round rod (5) has a constricted structure.

3. The snap ring mounting fixture for a powder metallurgy gear shaft according to claim 2, characterized in that: The lifting components of the press are guided by a gear and rack mechanism (7).

4. The snap ring mounting fixture for a powder metallurgy gear shaft according to claim 3, characterized in that: The upper end of the lifting component of the press is connected to the top of the press via a return spring (8).

5. The snap ring mounting fixture for a powder metallurgy gear shaft according to claim 1, characterized in that: The lower end of the shaft (2) is provided with a locking block (9), and a slot matching the locking block (9) is opened at the corresponding position of the shaft placement hole.

6. The snap ring mounting fixture for a powder metallurgy gear shaft according to claim 5, characterized in that: One part of the position where the upper end of the shaft (2) contacts the gear (10) is a plane (11), and the gear (10) has a corresponding mounting groove that matches the plane (11).

7. A snap ring mounting fixture for a powder metallurgy gear shaft according to any one of claims 1-6, characterized in that: The upper end of the round rod (5) is connected to the press via a spring.

8. A snap ring mounting fixture for a powder metallurgy gear shaft according to any one of claims 1-6, characterized in that: The upper outer side of the round rod (5) is provided with an annular baffle with a diameter larger than that of the through hole.

9. A snap ring mounting fixture for a powder metallurgy gear shaft according to any one of claims 1-6, characterized in that: The round rod (5) has a stepped structure, and the through hole is a corresponding stepped hole.

Images