Adjusting gear forming die

Abstract

The utility model discloses an adjusting gear forming die. Comprising an adjusting gear and a forming die, the forming die comprises an upper inner punch, an upper outer punch, a middle die, a first lower punch, a second lower punch, a third lower punch and a core rod which are sequentially arranged from top to bottom, and a cavity is formed in the middle of the middle die; the bottom of the upper outer punch extends into the cavity, the bottom of the lower outer punch extends into the cavity, and the bottom of the upper inner punch and the bottom of the upper outer punch jointly form an upper cavity wall; the third lower punch penetrates through the second lower punch and the first lower punch from bottom to top, and the top of the first lower punch, the top of the second lower punch and the top of the third lower punch jointly form a lower cavity wall; a fifth axial through hole is formed in the lower third punch, the core rod penetrates through the fifth axial through hole and the first axial through hole from bottom to top, and the outer wall, located in the cavity, of the core rod serves as an inner cavity wall; and the upper cavity wall, the lower cavity wall, the inner cavity wall and the mold cavity jointly form a mold cavity for adjusting the gear. The utility model has the advantages of high strength and high production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of powder metallurgy, and particularly relates to an adjusting gear forming die. Background Art

[0002] In order to cooperate with the driving shaft, a connecting shaft body for connecting the driving shaft is arranged in the middle of the adjusting gear of the vehicle seat. As Figure 4 shown, the connecting shaft body protrudes on both sides of the adjusting gear, and an assembly hole for cooperating with the driving shaft is opened inside the connecting shaft body.

[0003] The existing adjusting gear of the vehicle seat connects the middle connecting shaft body with the body of the adjusting gear by welding. The problem is that the strength of the welding part of the adjusting gear cannot be guaranteed, and the welding process is time-consuming and laborious. It is urgent to manufacture the adjusting gear of the vehicle seat by an integral forming method. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an adjusting gear forming die which can produce an integrally formed adjusting gear and is convenient and fast in production, aiming at the deficiencies existing in the prior art.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is: an adjusting gear forming die, comprising an adjusting gear and a forming die. The forming die comprises an upper inner punch, an upper outer punch, a middle die, a lower first punch, a lower second punch, a lower third punch and a core rod which are arranged in sequence from top to bottom. A cavity is arranged in the middle of the middle die; the upper inner punch is provided with a first axial through hole, the upper outer punch is provided with a second axial through hole, the bottom of the upper outer punch extends into the cavity, the upper inner punch passes through the second axial through hole from top to bottom, the bottom of the lower outer punch extends into the cavity, and the bottom of the upper inner punch and the bottom of the upper outer punch jointly form an upper cavity wall; the lower first punch is provided with a third axial through hole, the lower second punch passes through the third axial through hole from bottom to top, the top of the lower second punch extends into the cavity, the lower second punch is provided with a fourth axial through hole, the lower third punch passes through the fourth axial through hole from bottom to top, the top of the lower third punch extends into the cavity, and the top of the lower first punch, the top of the lower second punch and the top of the lower third punch jointly form a lower cavity wall; the lower third punch is provided with a fifth axial through hole, the cross section of the fifth axial through hole is the same as that of the first axial through hole, the core rod passes through the fifth axial through hole and the first axial through hole from bottom to top, and the outer wall of the core rod in the cavity serves as an inner cavity wall; the upper cavity wall, the lower cavity wall, the inner cavity wall and the cavity jointly form a die cavity for the adjusting gear.

[0006] Preferably, a first cavity is formed between the outer wall of the upper inner punch and the second axial through hole. The upper inner punch is radially provided with a first air vent connecting the first axial through hole, and the upper outer punch is radially provided with a second air vent connecting the first cavity.

[0007] Preferably, a second cavity is formed between the lower first punch and the lower second punch, a third cavity is formed between the lower second punch and the lower third punch, and a fourth cavity is formed between the core rod and the lower third punch.

[0008] Preferably, the aperture of the second axial through-hole is the same as that of the fourth axial through-hole.

[0009] Preferably, the cross-section of the mandrel is in the shape of a concave-convex gear.

[0010] Preferably, the middle die includes a middle die sleeve arranged outside the cavity.

[0011] Preferably, the inner wall of the cavity is provided with straight-tooth threads.

[0012] Compared with the prior art, the present utility model has the following advantages: a forming die for integrally forming an adjusting gear is designed, avoiding the problem of the structural strength of the welded adjusting gear and improving the strength of the adjusting gear; by using the cavity and through-holes, the problem of poor operation caused by gas extrusion between the dies is reduced, the production of the adjusting gear is accelerated, and the production efficiency is improved. Description of the Drawings

[0013] Figure 1 is an axonometric view of the forming die in the present utility model.

[0014] Figure 2 is a sectional view of the forming die in the present utility model.

[0015] Figure 3 is an exploded axonometric view of the forming die in the present utility model.

[0016] Figure 4 is an axonometric view of the adjusting gear in the present utility model.

[0017] Wherein, 1 - forming die, 11 - upper inner punch, 12 - upper outer punch, 13 - middle die, 14 - lower first punch, 15 - lower second punch, 16 - lower third punch, 17 - mandrel, 21 - first ventilation hole, 22 - second ventilation hole, 23 - cavity, 31 - first axial through-hole, 32 - second axial through-hole, 33 - third axial through-hole, 34 - fourth axial through-hole, 35 - fifth axial through-hole. Detailed Embodiments

[0018] The present utility model will be further clarified below in conjunction with the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. After reading the present utility model, various equivalent forms of modification by those skilled in the art fall within the scope defined by the appended claims of this application.

[0019] As Figures 1 to 3The shown adjusting gear forming die includes an adjusting gear and a forming die 1. The forming die 1 includes an upper inner punch 11, an upper outer punch 12, a middle die 13, a lower first punch 14, a lower second punch 15, a lower third punch 16, and a mandrel 17 arranged successively from top to bottom. A cavity 23 is provided in the middle of the middle die 13, and a straight-tooth thread is provided on the inner wall of the cavity 23. The middle die 13 includes a middle die 13 sleeve arranged outside the cavity 23; the upper inner punch 11 is provided with a first axial through hole 31, the upper outer punch 12 is provided with a second axial through hole 32, the bottom of the upper outer punch 12 extends into the cavity 23, the upper inner punch 11 passes through the second axial through hole 32 from top to bottom, the bottom of the lower outer punch extends into the cavity 23, and the bottom of the upper inner punch 11 and the bottom of the upper outer punch 12 jointly form an upper cavity wall; the lower first punch 14 is provided with a third axial through hole 33, the lower second punch 15 passes through the third axial through hole 33 from bottom to top, the top of the lower second punch 15 extends into the cavity 23, the lower second punch 15 is provided with a fourth axial through hole 34, the lower third punch 16 passes through the fourth axial through hole 34 from bottom to top, and the aperture of the second axial through hole 32 is the same as the aperture of the fourth axial through hole 34, achieving symmetry in the up and down positions and ensuring the symmetrical flatness of the finished product. The top of the lower third punch 16 extends into the cavity 23, and the top of the lower first punch 14, the top of the lower second punch 15, and the top of the lower third punch 16 jointly form a lower cavity wall; the lower third punch 16 is provided with a fifth axial through hole 35, and the fifth axial through hole 35 has the same cross-section as the first axial through hole 31. The cross-section of the mandrel 17 is in the shape of a concave-convex gear, and the mandrel 17 passes through the fifth axial through hole 35 and the first axial through hole 31 from bottom to top. The outer wall of the mandrel 17 in the cavity 23 serves as the inner cavity wall; the upper cavity wall, the lower cavity wall, the inner cavity wall, and the cavity 23 jointly form a die cavity for the adjusting gear.

[0020] A first cavity is formed between the outer wall of the upper inner punch 11 and the second axial through hole 32. The upper inner punch 11 is radially provided with a first air vent hole 21 connecting the first axial through hole 31, and the upper outer punch 12 is radially provided with a second air vent hole 22 connecting the first cavity. A second cavity is formed between the lower first punch 14 and the lower second punch 15, a third cavity is formed between the lower second punch 15 and the lower third punch 16, and a fourth cavity is formed between the mandrel 17 and the lower third punch 16. Through the cavities and the air vent holes, the air during the pressurization process is exhausted, making the stamping process smoother.

[0021] The working process and principle of the present utility model: During work, the mandrel 17 is successively inserted into the lower third punch 16, the lower second punch 15, the lower first punch 14, the middle die 13, and the upper inner punch 11. The material is filled into the cavity 23. The upper inner punch 11 and the lower third punch 16 cooperate to form the connecting shaft body in the middle of the adjusting gear. The upper outer punch 12 and the lower first punch 14, the lower second punch 15 cooperate to form the straight teeth and groove surfaces of the adjusting gear, and it is formed in one stamping. It has high structural strength and high production efficiency.

[0022] The above description shows and describes the preferred embodiments of the present utility model. As previously mentioned, it should be understood that the present utility model is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments. Instead, it can be used in various other combinations, modifications, and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the techniques or knowledge in the relevant field. Any changes and variations made by those skilled in the art without departing from the spirit and scope of the present utility model shall fall within the protection scope of the appended claims of the present utility model.

Claims

1. An adjusting gear forming die, comprising an adjusting gear and a forming die, characterized in that: The forming mold comprises an upper inner punch, an upper outer punch, a middle die, a lower punch, a lower second punch, a lower third punch and a core rod which are arranged in sequence from top to bottom. A cavity is arranged in the middle of the middle die; the upper inner punch is provided with a first axial through hole, the upper outer punch is provided with a second axial through hole, the bottom of the upper outer punch extends into the cavity, the upper inner punch passes through the second axial through hole from top to bottom, the bottom of the lower outer punch extends into the cavity, and the bottom of the upper inner punch and the bottom of the upper outer punch jointly form an upper cavity wall; the lower punch is provided with a third axial through hole, the lower second punch passes through the third axial through hole from bottom to top, and the top of the lower second punch The lower two punches are provided with a fourth axial through hole, and the lower three punches pass through the fourth axial through hole from bottom to top. The top of the lower three punches extends into the cavity, and the top of the lower punch, the top of the lower two punches, and the top of the lower three punches jointly form the lower cavity wall; the lower three punches are provided with a fifth axial through hole, and the fifth axial through hole is consistent with the cross-section of the first axial through hole. The core rod passes through the fifth axial through hole and the first axial through hole from bottom to top, and the outer wall of the core rod in the cavity serves as the inner cavity wall; the upper cavity wall, the lower cavity wall, the inner cavity wall and the cavity jointly form the mold cavity of the adjusting gear.

2. The adjusting gear forming die according to claim 1, characterized in that: A first cavity is formed between the outer wall of the upper inner punch and the second axial through hole, a first air vent is radially provided on the upper inner punch to connect to the first axial through hole, and a second air vent is radially provided on the upper outer punch to connect to the first cavity.

3. The adjusting gear forming die according to claim 1, characterized in that: A second cavity is formed between the lower punch and the lower second punch, a third cavity is formed between the lower second punch and the lower third punch, and a fourth cavity is formed between the core rod and the lower third punch.

4. The adjusting gear forming die according to claim 1, characterized in that: The diameter of the second axial through hole is the same as the diameter of the fourth axial through hole.

5. The adjusting gear forming die according to claim 1, characterized in that: The cross section of the mandrel is in the shape of a concave and convex gear.

6. The adjusting gear forming die according to claim 1, characterized in that: The middle mold includes a middle mold sleeve arranged outside the mold cavity.

7. The adjusting gear forming die according to claim 1, characterized in that: The inner wall of the cavity is provided with a straight tooth thread.

Images