Pressure foot differential connecting rod structure and embroidery machine

Abstract

The utility model discloses a presser foot differential connecting rod structure and an embroidery machine. The presser foot differential connecting rod structure comprises a presser foot differential connecting rod and a damping seat fixed at the end part of the presser foot differential connecting rod, the damping seat comprises a seat body with a cavity inside and a damping body; a cavity is formed in the base, a window communicated with the cavity is formed in the top of the base, the damping body comprises an embedding part embedded in the cavity and a matching part exposed out of the window, and the matching part is used for bearing the presser foot and is matched with the ascending stroke and the descending stroke of the presser foot. The damping device has the advantages that the damping effect is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to a presser foot differential connecting rod structure and an embroidery machine, and is applied in the technical field of embroidery machines. Background Art

[0002] The applicant's prior application CN206581003U discloses a presser foot transmission device for an embroidery machine head, including a presser foot driven by a main shaft, the presser foot connected to a needle bar, the needle bar installed on a needle bar frame, a presser foot transmission device is provided between the main shaft and the presser foot, the presser foot transmission device includes a cam connected to the main shaft, the cam drives a V-shaped connecting rod with an opening downward, the V-shaped connecting rod with an opening downward is connected to a V-shaped connecting rod with an opening upward, and the V-shaped connecting rod with an opening upward cooperates with the presser foot to move.

[0003] The presser foot transmission device is used to match the speed difference between the needle bar and the presser foot. One end of the V-shaped connecting rod (presser foot differential connecting rod) is used for differential coordination with the presser foot. Specifically, a bushing is connected to the outer sleeve of one end of the pin shaft, and a shock-absorbing ring is connected to the outside of the bushing. The shock-absorbing ring contacts the presser foot to provide support to complete the differential coordination. However, the shock-absorbing ring is limited by its thin thickness. Under the impact of the high-frequency reciprocating lifting and lowering motion of the presser foot, the shock-absorbing effect is poor, and it is very easy to be damaged, resulting in a short service life. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a presser foot differential connecting rod structure and an embroidery machine, which can improve the shock absorption effect and prolong the service life.

[0005] The utility model is realized through the following technical solutions.

[0006] A presser foot differential connecting rod structure, comprising a presser foot differential connecting rod and a shock absorbing seat fixed on the end of the presser foot differential connecting rod;

[0007] The shock-absorbing seat includes a seat body with a cavity inside and a shock-absorbing body; the top of the seat body has a window connected to the cavity, and the shock-absorbing body includes an embedding part embedded in the cavity and a matching part exposed by the window, and the matching part is used to support the presser foot and cooperate with the rising stroke and descending stroke of the presser foot.

[0008] As a further improvement of the present invention, the width of the window in a certain direction is smaller than the maximum width of the cavity in the direction, so as to prevent the shock absorbing body from escaping from the window.

[0009] As a further improvement of the present invention, the inner wall of the seat body has at least one inner recess, and the shock absorber has an outer protrusion that fits in with the inner recess; or, the inner wall of the seat body has at least one outer protrusion, and the shock absorber has an inner recess that fits in with the outer protrusion, so as to prevent the shock absorber from falling out of the window.

[0010] As a further improvement of the present invention, the embedded portion is configured as a laterally extending cylinder, and the matching portion has a limiting structure abutting against the edge of the window to prevent the shock absorbing body from circumferentially rotating relative to the seat body.

[0011] As a further improvement of the present invention, the embedded portion is configured as a laterally extending polygonal column, which is used to prevent the shock-absorbing body from rotating circumferentially relative to the seat body.

[0012] As a further improvement of the present invention, the matching portion of the shock absorbing body has an arc-shaped surface in contact with the presser foot.

[0013] As a further improvement of the utility model, one side of the seat body is provided with a latch, and the latch is transversely inserted and fixed to the end of the presser foot differential connecting rod.

[0014] As a further improvement of the present invention, a processing window communicating with the cavity is provided on the side of the seat.

[0015] As a further improvement of the present invention, the shock absorbing body is configured as a shock absorbing body made of rubber material.

[0016] An embroidery machine comprises the presser foot differential connecting rod structure.

[0017] Beneficial effects of the utility model:

[0018] On the one hand, it can provide a better buffering effect on the presser foot to complete the differential coordination and reduce the vibration of the embroidery machine; on the other hand, due to the high-frequency reciprocating and lifting motion characteristics of the presser foot, the shock-absorbing body of this embodiment can have better fatigue tolerance compared to the prior art, avoiding damage caused by high-frequency impact and extending the service life; in addition, due to the embedded coordination of the shock-absorbing body and the seat body, the disassembly and replacement of the shock-absorbing body is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following is a detailed description of the preferred implementation examples of the present invention with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein:

[0020] Figure 1 It is a structural schematic diagram of the presser foot differential connecting rod structure;

[0021] Figure 2 This is a schematic diagram of the explosion of the shock absorber;

[0022] Figure 3 It is a schematic diagram of the relationship between the presser foot differential connecting rod structure and the presser foot. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below based on the accompanying drawings and implementation cases.

[0024] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0025] Implementation Case 1:

[0026] Reference Figure 1-Figure 3 , a presser foot differential link structure is arranged in the head of an embroidery machine, and its function is to achieve the speed difference between the needle bar 4 and the presser foot 3. The presser foot differential link structure of this embodiment includes a presser foot differential link 1 and a shock absorber seat 2, and the shock absorber seat 2 is fixed on the end of the presser foot differential link 1. The shock absorber seat 2 includes a seat body 21 and a shock absorber body 22, the seat body 21 has a cavity 2a inside, and a window 2b is provided on the top of the seat body 21, and the window 2b is connected to the cavity 2a in the seat body 21; the shock absorber body 22 includes an embedded portion 221 and a matching portion 222, wherein the embedded portion 221 is embedded in the cavity 2a, and the matching portion 222 is exposed by the window 2b, and the matching portion 222 is used to carry the presser foot 3 and match the rising stroke and the falling stroke of the presser foot 3.

[0027] Regarding the cooperation of the matching portion 222 with the rising stroke and the falling stroke of the presser foot 3, more specifically, the matching portion 222 of the shock absorber 22 can provide support for the matching component 31 of the presser foot 3. When the presser foot 3 is in the rising stroke, the needle bar 4 moves upward from the lowest position when the presser foot 3 is pressed on the embroidery cloth, the presser foot differential link 1 swings, the matching portion 222 supports the matching component 31 and applies force to the presser foot 3 and drives the presser foot 3 to rise a certain distance to reduce the speed difference between the presser foot 3 and the needle bar 4. Since the moving speed of the needle bar 4 is greater than that of the presser foot 3, the needle clamp of the needle bar 4 finally presses against the presser foot 3 and drives the presser foot 3 to move upward, and the presser foot differential link 1 and the presser foot 3 are separated. When cooperating with the descending stroke of the presser foot 3, the needle bar 4 moves downward from the highest position, and through the action of the compression spring supporting the needle bar 4 and the presser foot 3, the needle bar 4 drives the presser foot 3 to move downward. When the presser foot 3 descends a certain distance and approaches the embroidery cloth, the mating portion 222 supports the mating component 31 and applies force to the presser foot 3 and continuously reduces the speed of the presser foot 3 until the presser foot 3 presses the embroidery cloth.

[0028] In this embodiment, a cavity 2a is provided in the seat 21 and the shock-absorbing body 22 is embedded in the cavity 2a, so that the size of the shock-absorbing body 22 is maximized, thereby increasing the thickness of the support of the presser foot 3 by the shock-absorbing body 22. On the one hand, it can better provide a buffering effect on the presser foot 3 to complete the differential coordination and reduce the vibration of the embroidery machine; on the other hand, due to the high-frequency reciprocating and lifting motion characteristics of the embroidery needle, the shock-absorbing body 22 of this embodiment can have better fatigue tolerance compared with the prior art, avoid damage caused by high-frequency impact, and extend the service life.

[0029] In order to prevent the shock absorber 22 from falling out of the cavity 2a and causing the shock absorber 22 to lose its function during the high-frequency swing of the presser foot differential link 1, the shock absorber 22 needs to have an anti-falling performance.

[0030] In one embodiment, the width of the window 2b in a certain direction is smaller than the maximum width of the cavity 2a in the same direction, so as to prevent the shock absorber 22 from escaping from the window 2b. For example, in the present embodiment, the seat 21 is a cylindrical structure extending laterally, and the height of the window 2b is lower than the horizontal plane where the center line of the seat 21 is located, so that the width of the window 2b in the horizontal radial direction is smaller than the diameter width of the cavity 2a, so that the embedded portion 221 of the shock absorber 22 cannot escape from the window 2b when embedded in the cavity 2a.

[0031] In another embodiment, the inner wall of the seat body 21 has at least one inner recess, and the shock absorber 22 has an outer protrusion that fits in with the inner recess; or, the inner wall of the seat body 21 has at least one outer protrusion, and the shock absorber 22 has an inner recess that fits in with the outer protrusion, so as to prevent the shock absorber 22 from falling out of the window 2b. Through the fitting of the inner recess and the outer protrusion, the embedded portion 221 can also be locked in the cavity 2a to prevent the shock absorber 22 from falling out of the window 2b.

[0032] In addition, in order to ensure that the supporting effect of the matching portion 222 on the matching component 31 of the presser foot 3 is stable, it is also required that the shock absorbing body 22 will not move relative to the seat body 21 in the cavity 2a.

[0033] In one embodiment, the embedding portion 221 is configured as a laterally extending cylinder, and the matching portion 222 has a limiting structure 221 a abutting against the edge of the window 2 b to prevent the shock absorbing body 22 from circumferentially rotating relative to the seat body 21 .

[0034] In another embodiment, the embedded portion 221 is configured as a laterally extending polygonal column, so as to prevent the shock absorbing body 22 from circumferentially rotating relative to the seat body 21 .

[0035] In addition, based on the swing characteristics of the connecting rod structure of the presser foot 3, the movement trajectory of the shock absorbing seat 2 is arc-shaped. Based on this, in this embodiment, the mating portion 222 of the shock absorbing body 22 has an arc-shaped surface in contact with the presser foot 3, thereby reducing the friction resistance between the mating portion 222 and the mating component 31 of the presser foot 3.

[0036] Regarding the connection relationship between the shock absorber seat 2 and the presser foot differential link 1, in this embodiment, a pin 23 is provided on one side of the seat body 21, and the pin 23 is laterally inserted and fixed on the end of the presser foot differential link 1, and a fastening nut 231 is installed at the other end where the pin 23 passes through the presser foot differential link 1.

[0037] In addition, in this embodiment, a processing window 2c communicating with the cavity 2a is provided on the side of the seat body 21, and the cavity 2a in the seat body 21 can be processed through the processing window 2c to reduce the difficulty of the processing and manufacturing process.

[0038] In this test case, the shock absorbing body 22 is configured to be a shock absorbing body 22 made of rubber material, so that the shock absorbing body 22 has good shock absorbing performance.

[0039] Implementation Case 2:

[0040] An embroidery machine includes a presser foot differential connecting rod structure, and the presser foot differential connecting rod structure is shown in implementation case 1.

[0041] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the implementation cases of the utility model.

Claims

1. A presser foot differential connecting rod structure, characterized in that: It includes a presser foot differential connecting rod and a shock absorbing seat fixed on the end of the presser foot differential connecting rod; The shock-absorbing seat includes a seat body with a cavity inside and a shock-absorbing body; the top of the seat body has a window connected to the cavity, and the shock-absorbing body includes an embedding part embedded in the cavity and a matching part exposed by the window, and the matching part is used to support the presser foot and cooperate with the rising stroke and descending stroke of the presser foot.

2. The presser foot differential link structure according to claim 1, characterized in that: The width of the window in a certain direction is smaller than the maximum width of the cavity in the same direction, so as to prevent the shock-absorbing body from escaping from the window.

3. The presser foot differential link structure according to claim 1, characterized in that: The inner wall of the seat body has at least one inner recess, and the shock absorber has an outer protrusion that fits in with the inner recess; or, the inner wall of the seat body has at least one outer protrusion, and the shock absorber has an inner recess that fits in with the outer protrusion, so as to prevent the shock absorber from falling out of the window.

4. The presser foot differential link structure according to claim 1, characterized in that: The embedding portion is configured as a laterally extending cylinder, and the matching portion has a limiting structure abutting against the edge of the window to prevent the shock absorbing body from circumferentially rotating relative to the seat body.

5. The presser foot differential link structure according to claim 1, characterized in that: The embedded portion is configured as a laterally extending polygonal column, and is used to prevent the shock-absorbing body from rotating in the circumferential direction relative to the seat body.

6. The presser foot differential link structure according to any one of claims 1 to 5, characterized in that: The matching portion of the shock-absorbing body has an arc-shaped surface in contact with the presser foot.

7. The presser foot differential link structure according to any one of claims 1 to 5, characterized in that: One side of the seat body is provided with a latch, and the latch is transversely inserted and fixed on the end of the presser foot differential connecting rod.

8. The presser foot differential link structure according to any one of claims 1 to 5, characterized in that: A processing window communicating with the cavity is provided on the side of the seat body.

9. The presser foot differential link structure according to any one of claims 1 to 5, characterized in that: The shock absorbing body is configured as a shock absorbing body made of rubber material.

10. An embroidery machine, characterized in that: It comprises a presser foot differential connecting rod structure as described in any one of claims 1 to 9.

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