1294851 九、發明說明： 【發明所屬之技術領域】 - 本發明是有關於一種鼓式煞車機構，特別是有關於一 . 種可增進煞車制動效果之鼓式煞車機構。 【先前技術】 請參閱第1圖，一習知之鼓式煞車機構1主要包括有 一煞車槓桿11、一煞車槓桿固定座12、一煞車導線21、 一導管22、一調整螺帽37、一煞車臂31、一固定盤33以 φ 及一導線定位座33a。煞車槓桿11是以轉動之方式連接於 煞車槓桿固定座12，並且煞車槓桿11是與煞車導線21之 一端接合。煞車槓桿固定座12是設置於一機車之一把手 上。導管22之一端22a是固定於煞車槓桿固定座12，而 部份的煞車導線21是被導管22所包覆。煞車導線21之另 • 一端具有端部螺牙21a，端部螺牙21a是經由調整螺帽37 來固定於煞車臂31上。導線定位座33a是設置於固定盤 33之上，而導管22之另一端22b是固定於導線定位座33a •上。 此外，如第1圖及第2A圖所示，在固定盤33内設置 有一煞車凸輪34、一第一煞車蹄片35a、一第二煞車蹄片 35b以及一定位銷36。第一煞車蹄片35a是相對於第二煞 車蹄片35b，並且第一煞車蹄片35a之兩端及第二煞車蹄 片35b之兩端分別是抵接於煞車凸輪34及定位銷36。更 詳細的來說，第一煞車蹄片35a及第二煞車蹄片35b可以 定位銷36為旋轉支點來進行旋轉，因而可根據操作需要來 0134-A21578TWF1 (N2);95-丁 OP-7;/Hawdong 6 1294851 抵緊摩擦套設在固定盤33外圍上之一輪框38，進而可達 成對輪框38(或車輪）的煞車效果。此外，如第1圖及第2A ， 圖所示，煞車臂31是連接於設置在固定盤33内之煞車凸 . 輪 34。 當一騎乘者欲對輪框38(或車輪）進行煞車操作時，騎 乘者可扳動煞車槓桿11來拉動煞車導線21，因而可使連 接於煞車導線21之煞車臂31旋轉一角度。此時，如第2B 圖所示，連接於煞車臂31之煞車凸輪34亦會隨之依逆時 _ 針方向旋轉一角度，使得第一煞車蹄片35a及第二煞車蹄 片35b以定位銷36為旋轉支點而撐開。然而，由於煞車凸 輪34在將第一煞車蹄片35a及第二煞車蹄片35b撐開時所 接觸之位置不同，故第一煞車蹄片35a被煞車凸輪34所撐 開之一角度A會比第二煞車蹄片35b被煞車凸輪34所撐 開之一角度B小。在此，值得注意的是，當輪框38(或車 輪)朝車體前方轉動（依逆時針方向轉動）時，輪框38(或車 輪)之煞車制動主要是靠第一煞車蹄片35a與其抵緊摩擦來 Φ 達成。然而，由於角度A比角度B小，故當輪框38(或車 輪)朝車體前方轉動（依逆時針方向轉動）時，第一煞車蹄片 35a便會無法有效抵緊輪框38(或車輪），進而無法對輪框 38(或車輪)提供有效的煞車制動效果。 有鑑於此，本發明之目的是要提供一種應用於機車之 鼓式煞車機構，其可有效運用煞車蹄片與輪框之間的摩擦 力來達成輪框（或車輪)之煞車制動效果。 【發明内容】 0134-A21578TWF1 (N2);95-TOP-7;/Hawdong 7 1294851 本發明基本上採用如下所詳述之特徵以為了要解決上 述之問題。也就是說，本發明適用於一機車，並且包括一 - 煞車槓桿固定座；一煞車槓桿，係以轉動之方式連接於該 . 煞車槓桿固定座；一輪框；一固定盤，係套設於該輪框之 中，並且具有一煞車凸輪、一第一煞車蹄片、一第二煞車 蹄片及一定位銷，該第一煞車蹄片係相對於該第二煞車蹄 片，以及該第一煞車蹄片之兩端及該第二煞車蹄片之兩端 係分別抵接於該煞車凸輪及該定位銷；一煞車臂，係設置 Φ 於該固定盤之上，並且係連接於該煞車凸輪；一導管，係 連接於該煞車槓桿固定座與該煞車臂之間；以及一煞車導 線，係穿設於該導管之中，並且係固定於該煞車槓桿與該 固定盤之間，其中，當該煞車槓桿相對於該煞車槓桿固定 座轉動而拉動該煞車導線時，該導管係推動該煞車臂，以 '迫使該煞車凸輪轉動，以及該第一煞車蹄片及該第二煞車 蹄片係错由該煞車凸輪而對該定位銷旋轉’以抵緊摩擦該 輪框。 # 同時，根據本發明之鼓式煞車機構，其更包括一定位 座及一調整螺帽，其中，該定位座係設置於該固定盤之上， 該煞車導線具有一第一端及一第二端，該第一端係固定於 該煞車槓桿之上，該第二端係成形有螺紋，並且係藉由鎖 附於該調整螺帽而固定於該定位座之上。 又在本發明中，該鼓式煞車機構更包括一定位座及一 調整螺帽，其中，該定位座係設置於該固定盤之上，該煞 車導線具有一第一端及一第二端，該第一端係固定於該煞 0134-A21578TWF1 (N2);95-T〇P-7;/Hawdong 8 1294851 車槓桿之上，該第二端係固定於該定位座之上，該導管具 有一螺紋端部，以及該調整螺帽係抵接於該煞車臂，並且 係鎖附於該螺紋端部之上。 ， 為使本發明之上述目的、特徵和優點能更明顯易懂， 下文特舉較佳實施例並配合所附圖式做詳細說明。 【實施方式】 茲配合圖式說明本發明之較佳實施例。 第一實施例 • 請參閱第3A圖及第3B圖，本實施例之鼓式煞車機構 100主要包括有一煞車槓桿固定座110、一煞車槓桿120、 一輪框130、一固定盤140、一煞車臂150、一導管160、 一煞車導線170、一定位座180以及一調整螺帽190。 煞車槓桿固定座110可以是設置於一機車之上，而煞 ’ 車槓桿120是以轉動之方式連接於煞車槓桿固定座110。 如第3A圖、第3B圖、第4A圖及第4B圖所示，固定 盤140是套設於輪框130之中，並且固定盤140具有一煞 • 車凸輪141、一第一煞車蹄片H2、一第二煞車蹄片I43 及一定位銷144。如第4A圖及第4B圖所示，第一煞車蹄 片142是相對於第二煞車蹄片143,以及第一煞車蹄片142 之兩端及第二煞車蹄片143之兩端是分別抵接於煞車凸輪 141及定位銷144。 仍如第3A圖、第3B圖、第4A圖及第4B圖所示，煞 車臂150是設置於固定盤140之上，並且煞車臂150是連 接於固定盤140中之煞車凸輪141。 0134-A21578TWF1 (N2);95-TOP-7;/Hawdong 9 1294851 導管160是連接於煞車槓桿固定座110與煞車臂150 之間。 ' 定位座180是設置於固定盤140之上。 ， 煞車導線170是穿設於導管160之中，並且煞車導線 170是固定於煞車槓桿120與固定盤140之間。更詳細的 來說，煞車導線170具有一第一端171及一第二端172， 第一端171是固定於煞車槓桿120之上，而第二端172成 形有螺紋，並且是藉由鎖附於調整螺帽190而固定於定位 • 座180之上。 如上所述，當一騎乘者欲對輪框130(或車輪）進行煞車 操作時，騎乘者可扳動煞車槓桿120，此時，煞車槓桿120 會相對於煞車槓桿固定座110轉動而拉動煞車導線170。 特別的是，如第3B圖所示，由於煞車導線170已從煞車 ' 槓桿固定座110處被拉出，加上煞車導線170是固定於煞 車槓桿120與固定盤140之間，故位於導管160與定位座 180間之煞車導線170的長度勢必會減少。也就是說，拉 • 動煞車導線170即會迫使導管160推動煞車臂150，進而 會迫使連接於煞車臂150之煞車凸輪141依順時針方向轉 動。此時，如第4B圖所示，第一煞車蹄片142及第二煞 車蹄片143會以定位銷144為旋轉支點而撐開（亦即，第一 煞車蹄片142及第二煞車蹄片143會對定位銷144旋轉而 各自撐開一角度）。此時，由於煞車凸輪141在將第一煞車 蹄片142及第二煞車蹄片143撐開時所接觸之位置不同， 故第一煞車蹄片142被煞車凸輪141所撐開之一角度A’ 0134-A21578TWFl(N2);95-TOP-7;/Hawdong 10 1294851 會比第二煞車蹄片143被煞車凸輪141所撐開之一角度以 大。在此，值得注意的是，當輪框130(或車輪）朝車體前方 ， 轉動（依逆時針方向轉動）時，輪框130(或車輪）之煞車制動 . 主要是靠第一煞車蹄片142與其抵緊摩擦來達成。如上所 述，由於角度A’比角度B’大，故當輪框130(或車輪）朝車 體前方轉動（依逆時針方向轉動）時，第一煞車蹄片142便 能有效抵緊輪框130(或車輪），進而可對輪框130(或車輪) 提供有效的煞車制動效果。 第二實施例 在本實施例中，與第一實施例相同之元件均標示以相 同之符號。 ‘ 請參閱第5圖，在本實施例之鼓式煞車機構100’之 ' 中，定位座180’是設置於固定盤140之上，煞車導線170’ 具有一第一端171及一第二端172’，第一端171是固定於 煞車槓桿120之上，而第二端172’是直接固定於定位座 • 180’之上。此外，導管160’具有一螺紋端部161，調整螺 帽190’是抵接於煞車臂150，並且調整螺帽190’是鎖附於 導管160’之螺紋端部161之上。 至於本實施例之其他元件構造或特徵均與第一實施例 相同，故為了使本案之說明書内容能更清晰易懂起見，在 此省略其重複之說明。 同樣地，當一騎乘者對輪框130(或車輪）進行煞車操作 時，藉由導管160’推動煞車臂150，即可對輪框130(或車 0134-A21578TWF1 (N2);95-TOP-7;/Hawdong 11 1294851 輪)提供有效的煞車制動效果。 雖然本發明已以較佳實施例揭露於上，然其並非用以 限定本發明，任何熟習此項技藝者，在不脫離本發明之精 神和範圍内，當可作些許之更動與潤飾，因此本發明之保 護範圍當視後附之申請專利範圍所界定者為準。1294851 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention relates to a drum brake mechanism, and more particularly to a drum brake mechanism that can improve the brake effect of a brake. [Prior Art] Referring to Figure 1, a conventional drum brake mechanism 1 mainly includes a brake lever 11, a brake lever mount 12, a brake wire 21, a conduit 22, an adjustment nut 37, and a brake arm. 31. A fixed disk 33 is positioned by a φ and a wire positioning seat 33a. The brake lever 11 is rotationally coupled to the brake lever mount 12, and the brake lever 11 is engaged with one end of the brake wire 21. The brake lever mount 12 is disposed on one of the handles of a locomotive. One end 22a of the duct 22 is fixed to the brake lever mount 12, and a part of the brake wire 21 is covered by the duct 22. The other end of the brake wire 21 has an end thread 21a, and the end thread 21a is fixed to the brake arm 31 via the adjusting nut 37. The wire positioning seat 33a is disposed above the fixed disk 33, and the other end 22b of the catheter 22 is fixed to the wire positioning seat 33a. Further, as shown in Figs. 1 and 2A, a brake cam 34, a first brake shoe 35a, a second brake shoe 35b, and a positioning pin 36 are disposed in the fixed disk 33. The first brake shoe 35a is opposite to the second brake shoe 35b, and both ends of the first brake shoe 35a and the second brake shoe 35b are abutted against the brake cam 34 and the positioning pin 36, respectively. In more detail, the first brake shoe 35a and the second brake shoe 35b can be rotated by the positioning pin 36 as a rotation fulcrum, so that it can be 0134-A21578TWF1 (N2); 95-butyl OP-7 according to operation requirements; /Hawdong 6 1294851 A wheel frame 38 provided on the periphery of the fixed disk 33 is abutted against the friction, thereby achieving a braking effect on the wheel frame 38 (or the wheel). Further, as shown in Figs. 1 and 2A, the brake arm 31 is connected to a brake projection wheel 34 provided in the fixed disk 33. When a rider wants to perform a braking operation on the wheel frame 38 (or the wheel), the rider can pull the brake lever 11 to pull the brake wire 21, thereby rotating the brake arm 31 connected to the brake wire 21 by an angle. At this time, as shown in FIG. 2B, the brake cam 34 connected to the brake arm 31 is also rotated by an angle in the reverse direction, so that the first brake shoe 35a and the second brake shoe 35b are positioned pins. 36 is opened for the rotation fulcrum. However, since the position at which the brake cam 34 contacts the first brake shoe 35a and the second brake shoe 35b is different, the angle 1 of the first brake shoe 35a is distracted by the brake cam 34. The second brake shoe 35b is held at an angle B by the brake cam 34. Here, it is worth noting that when the wheel frame 38 (or the wheel) is rotated toward the front of the vehicle body (rotating in the counterclockwise direction), the brake of the wheel frame 38 (or the wheel) is mainly by the first brake shoe 35a and Resist the friction to achieve Φ. However, since the angle A is smaller than the angle B, when the wheel frame 38 (or the wheel) is rotated toward the front of the vehicle body (rotating in the counterclockwise direction), the first brake shoe 35a cannot effectively abut the wheel frame 38 (or The wheel), in turn, does not provide an effective braking effect on the wheel frame 38 (or the wheel). In view of the above, an object of the present invention is to provide a drum brake mechanism for a locomotive that can effectively utilize the friction between the brake shoe and the wheel frame to achieve the brake effect of the wheel frame (or wheel). SUMMARY OF THE INVENTION 0134-A21578TWF1 (N2); 95-TOP-7; /Hawdong 7 1294851 The present invention basically employs the features detailed below in order to solve the above problems. That is, the present invention is applicable to a locomotive and includes a brake lever fixing seat; a brake lever is coupled to the brake lever fixing seat in a rotating manner; a wheel frame; a fixed disk is sleeved on the In the wheel frame, and having a brake cam, a first brake shoe, a second brake shoe and a positioning pin, the first brake shoe is opposite to the second brake shoe, and the first brake The two ends of the shoe and the two ends of the second shoe are respectively abutted against the brake cam and the positioning pin; a brake arm is disposed on the fixed disk and is coupled to the brake cam; a conduit connected between the brake lever mount and the brake arm; and a brake wire disposed in the conduit and secured between the brake lever and the fixed disk, wherein When the brake lever rotates relative to the brake lever mount to pull the brake wire, the conduit pushes the brake arm to 'force the brake cam to rotate, and the first brake shoe and the second brake shoe are misaligned The Rotating the drive cam pin is positioned 'in a tight friction against the wheel frame. At the same time, the drum brake mechanism according to the present invention further includes a positioning seat and an adjusting nut, wherein the positioning seat is disposed on the fixing plate, and the braking wire has a first end and a second The first end is fixed to the brake lever, the second end is formed with a thread, and is fixed to the positioning seat by being locked to the adjusting nut. In the present invention, the drum brake mechanism further includes a positioning seat and an adjusting nut, wherein the positioning seat is disposed on the fixing plate, and the braking wire has a first end and a second end. The first end is fixed on the 煞0134-A21578TWF1 (N2); 95-T〇P-7;/Hawdong 8 1294851 vehicle lever, the second end is fixed on the positioning seat, the duct has a The threaded end, and the adjustment nut abuts the brake arm and is attached to the threaded end. The above described objects, features and advantages of the present invention will become more apparent from the description of the appended claims. [Embodiment] A preferred embodiment of the present invention will be described with reference to the drawings. First Embodiment Please refer to FIGS. 3A and 3B. The drum brake mechanism 100 of the present embodiment mainly includes a brake lever fixing base 110, a brake lever 120, a wheel frame 130, a fixed plate 140, and a brake arm. 150. A conduit 160, a brake wire 170, a positioning base 180, and an adjustment nut 190. The brake lever mount 110 may be disposed on a locomotive, and the ’' vehicle lever 120 is coupled to the brake lever mount 110 in a rotational manner. As shown in FIG. 3A, FIG. 3B, FIG. 4A and FIG. 4B, the fixing plate 140 is sleeved in the wheel frame 130, and the fixing plate 140 has a car cam 141 and a first brake shoe. H2, a second brake shoe piece I43 and a positioning pin 144. As shown in FIGS. 4A and 4B, the first brake shoe 142 is opposite to the second brake shoe 143, and both ends of the first brake shoe 142 and the second brake shoe 143 are respectively abutted. It is connected to the brake cam 141 and the positioning pin 144. Still as shown in Figs. 3A, 3B, 4A, and 4B, the arm 150 is disposed above the fixed plate 140, and the brake arm 150 is the brake cam 141 that is coupled to the fixed plate 140. 0134-A21578TWF1 (N2); 95-TOP-7; /Hawdong 9 1294851 The conduit 160 is connected between the brake lever mount 110 and the brake arm 150. The positioning seat 180 is disposed above the fixed disk 140. The brake wire 170 is threaded into the conduit 160, and the brake wire 170 is fixed between the brake lever 120 and the fixed disk 140. In more detail, the brake wire 170 has a first end 171 and a second end 172. The first end 171 is fixed to the brake lever 120, and the second end 172 is formed with a thread and is locked. The adjusting nut 190 is fixed to the positioning base 180. As described above, when a rider wants to perform a braking operation on the wheel frame 130 (or the wheel), the rider can pull the brake lever 120, and at this time, the brake lever 120 rotates relative to the brake lever mount 110 to pull the brake. Wire 170. In particular, as shown in FIG. 3B, since the brake wire 170 has been pulled out from the brake lever assembly 110 and the brake wire 170 is fixed between the brake lever 120 and the fixed disk 140, it is located in the conduit 160. The length of the brake wire 170 between the positioning block 180 and the positioning seat 180 is bound to decrease. That is, pulling the brake wire 170 forces the catheter 160 to push the brake arm 150, which in turn forces the brake cam 141 coupled to the brake arm 150 to rotate in a clockwise direction. At this time, as shown in FIG. 4B, the first brake shoe piece 142 and the second brake shoe piece 143 are opened by the positioning pin 144 as a rotation fulcrum (that is, the first brake shoe piece 142 and the second brake shoe piece 142). 143 rotates the positioning pins 144 to each open an angle). At this time, since the brake cam 141 is in a different position when the first brake shoe 142 and the second brake shoe 143 are opened, the first brake shoe 142 is held by the brake cam 141 at an angle A'. 0134-A21578TWFl(N2); 95-TOP-7;/Hawdong 10 1294851 will be larger than the second brake shoe 143 by the brake cam 141. Here, it is worth noting that when the wheel frame 130 (or the wheel) is rotated toward the front of the vehicle body (rotating in the counterclockwise direction), the brake of the wheel frame 130 (or the wheel) is mainly driven by the first brake shoe. 142 is achieved by friction with it. As described above, since the angle A' is larger than the angle B', when the wheel frame 130 (or the wheel) is rotated toward the front of the vehicle body (rotating in the counterclockwise direction), the first brake shoe piece 142 can effectively abut the wheel frame. 130 (or wheel), in turn, provides effective braking effect on wheel frame 130 (or wheel). SECOND EMBODIMENT In the present embodiment, the same elements as those of the first embodiment are denoted by the same reference numerals. Referring to FIG. 5, in the drum brake mechanism 100' of the present embodiment, the positioning seat 180' is disposed on the fixed plate 140, and the brake wire 170' has a first end 171 and a second end. 172', the first end 171 is fixed to the brake lever 120, and the second end 172' is directly fixed to the positioning seat 180'. In addition, the catheter 160' has a threaded end 161 with the adjustment nut 190' abutting the brake arm 150 and the adjustment nut 190' is attached to the threaded end 161 of the catheter 160'. The other element configurations and features of the present embodiment are the same as those of the first embodiment, and therefore, in order to make the contents of the present specification clearer and easier to understand, the repeated description thereof will be omitted. Similarly, when a rider performs a braking operation on the wheel frame 130 (or the wheel), the wheel frame 130 can be pushed by the conduit 160' (or the car 0134-A21578TWF1 (N2); 95-TOP- 7;/Hawdong 11 1294851 wheel) provides effective braking effect. Although the present invention has been disclosed in its preferred embodiments, it is not intended to limit the present invention, and it is possible to make some modifications and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.
0134-A21578TWF1 (N2);95-TOP-7;/Hawdong 12 1294851 【圖式簡單說明】 ^ 1圖係顯示-習知鼓式煞車機構 〜 第2A圖係顯示根據第i圖之習知士 、面示意圖； 盤之一内部構造示意圖； 白°攱式煞車機構之固定 第2B圖係顧示根據第丨圖之習知 盤之另一内部構造示意圖； a，煞車機構之固定0134-A21578TWF1 (N2); 95-TOP-7;/Hawdong 12 1294851 [Simple diagram of the diagram] ^ 1 diagram display - the familiar drum brake mechanism ~ 2A diagram shows the knowledge according to the i-map, Schematic diagram of the internal structure of one of the discs; Fig. 2B of the fixing of the white 攱-type brake mechanism is a schematic diagram of another internal structure of the conventional disc according to the figure; a, fixing of the brake mechanism
弟3A圖係顯示本發明 之一平面示意圖； 弟3B圖係顯示本發明 之另一平面示意圖； n施例之鼓式煞車機構 之第-實施例之鼓式煞車機構 第4A圖係顯示根據第3a 之一内部構造示意圖； 圖之鼓式煞車機構之固定盤 第4B圖係顯示根據第3B圖之鼓式煞車 之另一内部構造示意圖；以及 U疋盔Figure 3A shows a plan view of the present invention; Figure 3B shows another schematic plan view of the present invention; n. The drum type brake mechanism of the first embodiment of the drum type brake mechanism is shown in Figure 4A. 3a is a schematic diagram of the internal structure; Figure 4B of the fixed disc of the drum brake mechanism of the figure shows another internal structure diagram of the drum brake according to Fig. 3B;
、，第=_顯示本發明之第二實施例之鼓式煞車機構之 平面不意圖。 【主要元件符號說明】 I、 100、100’〜鼓式煞車機構 II、 120〜煞車槓桿 12、110〜煞車槓桿固定座 21、 170、170’〜煞車導線 21a〜端部螺牙 22、 160〜導管 〇134-A21578TWF(N2)；95-T〇P-7；hawdong 13 1294851 22a、22b 〜端 31、150〜煞車臂 33、 140〜固定盤 3 3a〜導線定位座 34、 141〜煞車凸輪 35a、142〜第一煞車蹄片 35b、143〜第二煞車蹄片 36、144〜定位銷 丨 37、190、190’〜調整螺帽 38、130〜輪框 171〜第一端 172、172’〜第二端 180、180’〜定位座 A、A，、B、B，〜角度The first =_ shows the plane of the drum brake mechanism of the second embodiment of the present invention. [Description of main component symbols] I, 100, 100'~Drum brake mechanism II, 120~ brake lever 12, 110~ brake lever mount 21, 170, 170'~ brake wire 21a~ end screw 22, 160~ Catheter 〇134-A21578TWF(N2); 95-T〇P-7; hawdong 13 1294851 22a, 22b~end 31, 150~ 煞 arm 33, 140~ fixed disk 3 3a~ wire positioning seat 34, 141~ brake cam 35a 142~1 煞 煞 35 35 35 35 35 35 35 35 36 36 36 36 36 36 36 36 36 定位 定位 定位 定位 定位 定位 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整 调整Second end 180, 180'~ positioning seat A, A, B, B, ~ angle
0134-A21578TWF(N2)；95-TOP-7；hawdong 140134-A21578TWF(N2); 95-TOP-7; hawdong 14