A spring pre-tightening structure for a fixed center distance sectorial worm gear

Abstract

The utility model discloses a kind of fan-shaped worm gear spring pre-tightening structures suitable for fixed center distance, including pedestal, compression spring, fixed end cover and torsion spring.The pedestal is box structure, and the inside of box is equipped with a containing cavity, and the lateral wall of box is opened with a fixed groove.The containing cavity is installed with intermeshing fan-shaped worm gear and worm.The one end of worm passes out containing cavity, and extends into fixed groove, and is marked as A end.The A end of worm is provided with compression spring, and the compression spring is fixed by fixed end cover.The fan-shaped worm gear is connected with output rod, and torsion spring is set on the rod body of output rod.The utility model realizes the radial pre-tightening of fan-shaped worm gear by torsion spring, and eliminates transmission gap by the synergic effect of axial compression spring and radial torsion spring, to realize the gap automatic compensation under the condition of worm gear and worm fixed center distance.

Description

Technical Field

[0001] This utility model relates to the field of worm gear transmission technology, specifically a sector-shaped worm gear spring preload structure suitable for fixed center distance. Background Technology

[0002] In worm gear drives, even with high machining precision, a certain meshing clearance must be maintained during assembly to prevent jamming. While existing worm gear preload structures can solve some installation and usage problems, the following issues still exist:

[0003] 1) Fixed center distance structures are difficult to compensate for gaps by adjusting the installation distance;

[0004] 2) Existing preload structures are complex and difficult to apply to the special working conditions of sector worm gears;

[0005] 3) Lack of comprehensive solutions that address both axial and radial clearances simultaneously. Utility Model Content

[0006] The purpose of this utility model is to provide a preloaded structure for a sector-shaped worm gear spring suitable for a fixed center distance, including a base, a compression spring, a fixed end cap, and a torsion spring.

[0007] The base is a box structure, with an internal cavity and a fixing groove on the side wall of the box.

[0008] The cavity contains a sector-shaped worm gear and a worm.

[0009] The sector-shaped worm gear meshes with the worm.

[0010] One end of the worm gear passes through the receiving cavity and extends into the fixed groove, denoted as end A.

[0011] A compression spring is provided at end A of the worm gear, and the compression spring is fixed by a fixed end cap.

[0012] The sector-shaped worm gear is connected to the output rod, and a torsion spring is fitted on the body of the output rod.

[0013] Furthermore, the center distance between the sector-shaped worm gear and the worm is fixed.

[0014] Furthermore, the other end of the worm gear extends out of the base and is connected to the drive mechanism, denoted as end B.

[0015] Furthermore, a flange is provided on the side of the worm gear near end B, and the flange is located inside the receiving cavity.

[0016] Furthermore, the sidewall of the base is provided with through hole I and through hole II. The A end of the worm gear extends into the fixing groove through through hole I, and the B end extends into the outside through through hole II.

[0017] Furthermore, the fixed end cap is connected to the base by threads.

[0018] Furthermore, the fixed end cap includes an annular boss and an end cap. An annular boss is fixed on the center of one side plate of the end cap, and the annular boss is embedded in a fixing groove, so that the two ends of the compression spring abut against the end face of the end cap and the worm gear, respectively.

[0019] Furthermore, one end of the output rod is connected to a sector-shaped worm gear located in the receiving cavity, and the other end extends out of the base and is connected to the driven member.

[0020] Furthermore, a through hole III is provided on the side wall of the base. The output rod passes through the through hole III and connects to the driven member.

[0021] The technical effects of this utility model are undeniable, and its beneficial effects are as follows:

[0022] 1) This utility model effectively eliminates transmission backlash through the synergistic effect of a dual pre-tightening mechanism;

[0023] 2) This utility model achieves automatic gap compensation while maintaining a fixed center distance;

[0024] 3) This utility model has a simple structure, requires no complex adjustment mechanism, and has high reliability;

[0025] 4) The preload of this utility model is adjustable, which can adapt to different working conditions. Attached Figure Description

[0026] Figure 1 This is a schematic diagram (front view) of the preload structure of the sector-shaped worm gear spring of this utility model.

[0027] Figure 2 This is a schematic diagram (side view) of the preloaded structure of the sector-shaped worm gear spring of this utility model.

[0028] In the diagram: 1. Base; 2. Sector-shaped worm gear; 3. Worm; 4. Compression spring; 5. Fixed end cap; 6. Torsion spring; 301. Flange. Detailed Implementation

[0029] The present invention will be further described below with reference to embodiments, but it should not be construed as the scope of the present invention being limited to the following embodiments. Various substitutions and modifications made based on ordinary technical knowledge and conventional methods in the art without departing from the above-described technical concept of the present invention should be included within the protection scope of the present invention.

[0030] Example 1:

[0031] See Figure 1 , Figure 2A preloaded structure for a sector worm gear spring suitable for a fixed center distance includes a base 1, a compression spring 4, a fixed end cap 5, and a torsion spring 6.

[0032] The base 1 is a box structure, with an internal cavity and a fixing groove on the side wall of the box.

[0033] The cavity contains a sector-shaped worm gear 2 and a worm 3.

[0034] The sector-shaped worm gear 2 meshes with the worm 3.

[0035] One end of the worm gear 3 passes through the receiving cavity and extends into the fixed groove, denoted as end A.

[0036] A compression spring 4 is provided at end A of the worm gear 3, and the compression spring 4 is fixed by a fixed end cap 5.

[0037] The sector worm gear 2 is connected to the output rod, and a torsion spring 6 is fitted on the body of the output rod.

[0038] The radial preload of the sector worm gear 2 is achieved by the torsion spring 6, and the transmission backlash is eliminated by the synergistic action of the axial compression spring 4 and the radial torsion spring 6, so as to achieve automatic backlash compensation under the condition of fixed center distance of worm gear.

[0039] Example 2:

[0040] The main structure of this embodiment is the same as that of embodiment 1. Furthermore, the center distance between the sector worm gear 2 and the worm 3 is fixed.

[0041] Example 3:

[0042] The main structure of this embodiment is the same as any one of embodiments 1-2. Further, see [link to embodiment 1-2]. Figure 1 The other end of the worm gear 3 extends out of the base 1 and is connected to the drive mechanism, denoted as end B.

[0043] Example 4:

[0044] The main structure of this embodiment is the same as that of Embodiment 3. Further details can be found in [link to embodiment 3]. Figure 1 The worm gear 3 has a flange 301 on the side of the rod near end B, and the flange is located in the receiving cavity.

[0045] Example 5:

[0046] The main structure of this embodiment is the same as any one of embodiments 3-4. Further, see [link to embodiment 3-4]. Figure 1 The base 1 has through holes I and II on its side wall. The A end of the worm gear 3 extends into the fixing groove through through hole I, and the B end extends into the outside through through hole II.

[0047] Example 6:

[0048] The main structure of this embodiment is the same as any one of embodiments 1 to 5. Furthermore, the fixed end cap 5 and the base 1 are connected by threads.

[0049] Example 7:

[0050] The main structure of this embodiment is the same as any one of embodiments 1 to 6. Further, see [link to embodiment 1-6]. Figure 1 The fixed end cap 5 includes an annular boss and an end cap. An annular boss is fixed on the center of one side plate of the end cap, and the annular boss is embedded in a fixing groove, so that the two ends of the compression spring 4 abut against the end face of the end cap and the worm gear 3 respectively.

[0051] Example 8:

[0052] The main structure of this embodiment is the same as any one of embodiments 1 to 7. Further, see [link to embodiment 1]. Figure 2 One end of the output rod is connected to the sector worm gear 2 located in the receiving cavity, and the other end extends out of the base 1 and is connected to the driven member.

[0053] Example 9:

[0054] The main structure of this embodiment is the same as that of embodiment 8. Furthermore, a through hole III is provided on the side wall of the base 1. The output rod passes through the through hole III and connects to the driven member.

[0055] Example 10:

[0056] The main structure of this embodiment is the same as any one of embodiments 1 to 9, and further includes a base 1, a compression spring 4, a fixed end cap 5, and a torsion spring 6.

[0057] The base 1 is a box structure, with an internal cavity and through holes I, II, III and a fixing groove on the side wall of the box.

[0058] The two ends of the through hole I are respectively connected to the receiving cavity and the fixing groove.

[0059] The two ends of the through holes II and III are respectively connected to the receiving cavity and the outside.

[0060] Through hole I and through hole II are arranged opposite to each other.

[0061] The cavity contains a sector-shaped worm gear 2 and a worm 3.

[0062] The sector-shaped worm gear 2 meshes with the worm 3, and the center distance between the two is fixed.

[0063] One end of the worm gear 3 extends out of the cavity and into the fixed groove through the through hole I, which is denoted as end A. The other end extends out of the base 1 through the through hole II and is connected to the drive mechanism, which is denoted as end B.

[0064] A compression spring 4 is provided at end A of the worm gear 3, and the compression spring 4 is fixed by a fixed end cap 5.

[0065] The fixed end cap 5 includes an annular boss and an end cap, with the annular boss fixed at the center of one side plate of the end cap. The annular boss is embedded in a fixing groove, so that the two ends of the compression spring 4 abut against the end faces of the end cap and the worm gear 3, respectively.

[0066] The sector worm gear 2 is connected to the output rod. One end of the output rod is connected to the sector worm gear 2 located in the receiving cavity, and the other end extends out of the base 1 through the through hole III and is connected to the driving component. A torsion spring 6 is fitted on the body of the output rod.

[0067] Example 11:

[0068] The main structure of this embodiment is the same as any one of embodiments 1 to 10. Furthermore, this utility model patent proposes a pre-tightening structure for a worm gear mechanism for fixed center distance transmission, including a base 1 with an inner cavity. The inner cavity of the base is used to install a sector worm gear 2 and a worm 3. The center distance of the worm gear is fixed in the inner cavity. A compression spring 4 is provided at one end of the worm 3 and is fixed by a fixed end cap 5. The compression spring 4 achieves axial pre-tightening of the worm 3 by applying axial force to the worm 3. A torsion spring 6 is installed between the worm gear 2 and the base 1. One end of the torsion spring 6 is fixed to the inner cavity, and the other end acts on the sector worm gear 2.

[0069] This invention utilizes the synergistic effect of axial compression spring 4 and radial torsion spring 6 to solve the installation clearance problem of worm gears with small fixed center distances.

[0070] This invention uses a torsion spring 6 to achieve radial preload of the sector worm gear 2, which, together with the axial compression spring 4, effectively eliminates the meshing clearance of the worm gear. Compared with existing technical solutions, the structure is simpler, the applicability is higher, and the subsequent maintenance of the device is easier.

Claims

1. A preloaded structure for a sector-shaped worm gear spring suitable for a fixed center distance, characterized in that: Includes a base (1), a compression spring (4), a fixed end cap (5), and a torsion spring (6); The base (1) is a box structure, with an internal cavity and a fixing groove on the side wall of the box; The cavity is equipped with a sector worm gear (2) and a worm (3); The sector-shaped worm gear (2) meshes with the worm (3); One end of the worm (3) passes through the receiving cavity and extends into the fixed groove, which is referred to as end A; a compression spring (4) is provided at end A of the worm (3), and the compression spring (4) is fixed by a fixed end cap (5); The sector worm gear (2) is connected to the output rod, and a torsion spring (6) is sleeved on the body of the output rod.

2. The preload structure for a sector-shaped worm gear spring with a fixed center distance as described in claim 1, characterized in that: The center distance between the sector worm gear (2) and the worm (3) is fixed.

3. The sector-shaped worm gear spring preload structure suitable for fixed center distance as described in claim 1, characterized in that: The other end of the worm (3) extends out of the base (1) and is connected to the drive mechanism, denoted as end B.

4. The preload structure for a sector-shaped worm gear spring with a fixed center distance as described in claim 3, characterized in that: The worm (3) has a flange (301) on the side of the rod near end B, and the flange is located in the receiving cavity.

5. A preloaded structure for a sector-shaped worm gear spring with a fixed center distance as described in claim 3, characterized in that: The base (1) has through holes I and II on its side wall; the A end of the worm (3) extends into the fixed groove through through hole I, and the B end extends into the outside through through hole II.

6. The preload structure for a sector-shaped worm gear spring with a fixed center distance according to claim 1, characterized in that: The fixed end cap (5) and the base (1) are connected by threads.

7. The preload structure for a sector-shaped worm gear spring with a fixed center distance according to claim 1, characterized in that: The fixed end cap (5) includes an annular boss and an end cap; an annular boss is fixed on the center of one side plate of the end cap, and the annular boss is embedded in the fixing groove so that the two ends of the compression spring (4) abut against the end cap and the end face of the worm (3) respectively.

8. The preload structure for a sector-shaped worm gear spring with a fixed center distance according to claim 1, characterized in that: One end of the output rod is connected to the sector worm gear (2) located in the receiving cavity, and the other end extends out of the base (1) to connect to the driven member.

9. A preloaded structure for a sector-shaped worm gear spring with a fixed center distance as described in claim 8, characterized in that: The base (1) has a through hole III on its side wall; the output rod passes through the through hole III and is connected to the driven member.

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